A wig

Abstract

The present application provides a wig, comprising an inner layer structure and an outer layer structure, wherein the inner layer structure at least comprises an inner layer substrate of P3HB4HB, and the outer layer structure at least comprises an outer layer substrate of P3HB4HB, and a skin-core type or island-in-sea type structure of the wig is prepared by melt spinning. The wig fully imitates human hair, is soft inside and tough outside, has greater strength than human hair, has excellent dyeing property, and can completely replace chemical fiber wigs.

Description

Technical Field

[0001] This invention relates to the field of fiber materials technology, specifically to a wig, its preparation method, and its application. Background Technology

[0002] Currently, high-end wigs are mostly made from human hair, animal hair, or protein fibers. They are soft to the touch, have moderate luster, and are breathable, but they are expensive and face raw material shortages. Wigs made from synthetic fibers such as polyester (PET), polyvinyl chloride (PVC), polyamide (PA), and polypropylene (PP) are cheaper, but their feel, luster, and performance are inferior to those made from human hair. Furthermore, synthetic wigs do not degrade naturally after disposal, leading to large-scale accumulation that is extremely difficult to manage, posing a threat to the environment and contradicting the concept of sustainable development.

[0003] Based on the above situation, there is an urgent need to find a suitable biodegradable material as the main base material for the production of wigs, to replace low-end pure synthetic fiber wigs, while possessing physical and chemical properties and user experience comparable to human hair, and having good breathability, antibacterial, antistatic, and heat resistance properties, thereby solving the prominent problems existing in the current wig industry. Summary of the Invention

[0004] This invention provides a wig with a core-skin or island-type structure composed of specific raw materials. This wig closely mimics human hair, being soft on the outside and tough on the inside, stronger than human hair, and exhibiting excellent dyeability, making it a complete replacement for synthetic fiber wigs. Without the addition of antibacterial or smoothing agents, this wig possesses excellent antibacterial, anti-mite, and moisturizing properties, a smooth feel, and excellent skin-friendliness. The wig's manufacturing method eliminates acid washing and bleaching steps, and allows for re-dyeing and fading during subsequent use, making the wig's user experience even closer to that of real hair. Furthermore, the wig's styling method is more uniform, the styling temperature is lower, the styling time is shorter, its normal lifespan is longer, and it degrades quickly after disposal, aligning better with low-carbon and environmentally friendly principles. Specifically:

[0005] In a first aspect, the present invention provides a wig comprising an outer layer structure and an inner layer structure.

[0006] The mass ratio of the outer layer structure (or its raw material) to the inner layer structure (or its raw material) is any value in (35-126):(10-89), preferably any value in (62.5-81):(35-50), more preferably 8:5 or 1.6:1.

[0007] Preferably, the outer layer structure (or its raw materials) comprises an outer layer substrate and an outer layer auxiliary material. The outer layer substrate in the outer layer structure (or its raw materials) has a mass content of 50%-100% (preferably 50%-62.5%, 62.5%-100%, or 60-70%), for example, 50%, 60%, 62.5%, 65%, 70%, 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 99.5%, 99.9%, or 100%. The outer layer auxiliary material in the outer layer structure (or its raw materials) has a mass content of 0%-50%, for example, 0%, 5%, 6%, 7%, 8%, 9%, 10%, 15%, 20%, 30%, 40%, or 50%.

[0008] In one specific embodiment of the present invention, the outer layer structure (or its raw materials) includes 35-90 parts (preferably 55-70 parts) of outer layer substrate and 0-36 parts (preferably 12-24 parts) of outer layer auxiliary material.

[0009] In one specific embodiment of the present invention, the outer layer structure (or its raw materials) comprises 62.5 parts of outer layer substrate and 17.625 parts of outer layer auxiliary materials.

[0010] Preferably, the outer substrate comprises P3HB4HB. The molar content of 4HB in the P3HB4HB is any value between 0-20%, preferably any value between 5-20%, 8-15%, 10-20%, or 8-10%, for example, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, or 20%.

[0011] Preferably, the outer substrate comprises P3HB4HB with the same 4HB molar content.

[0012] Preferably, the outer substrate comprises one or more of P3HB and 4HB with different 4HB molar contents.

[0013] The inner layer structure (or its raw materials) comprises an inner layer substrate and inner layer auxiliary materials. The inner layer substrate comprises any value between 25% and 100% by mass, for example, 25%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 99.5%, 99.9%, or 100%. The auxiliary materials comprise any value between 0% and 75% by mass, for example, 0%, 5%, 6%, 7%, 8%, 9%, 10%, 15%, 20%, 30%, 40%, 50%, 60%, 70%, or 75%.

[0014] In one specific embodiment of the present invention, the inner layer structure (or its raw materials) comprises 10-60 parts (preferably 30-40 parts) of inner layer substrate and 0-29 parts (preferably 10-19 parts) of inner layer auxiliary material.

[0015] In one specific embodiment of the present invention, the inner layer structure (or its raw materials) comprises 35 parts of inner layer substrate and 14.125 parts of inner layer auxiliary materials.

[0016] The inner substrate comprises P3HB4HB. The molar content of 4HB in the P3HB4HB is any value between 0-20%, preferably any value between 5-20%, 8-15%, 10-20%, or 8-10%, for example, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, or 20%.

[0017] Preferably, the inner layer substrate contains the same 4HB molar content of P3HB4HB.

[0018] Preferably, the inner layer substrate comprises one or more of P3HB and 4HB with different 4HB molar contents.

[0019] Preferably, the inner layer substrate further includes one or more of PBAT, PBS, PBA, PBT, PLA, PPC, regenerated cellulose, seaweed fiber, or soybean protein fiber.

[0020] In one specific embodiment of the present invention, the inner layer substrate is selected from any one of the following groups:

[0021] A) P3HB4HB, PLA and PBAT, wherein the mass ratio of P3HB4HB, PLA and PBAT is (10-20):(10-15):(5-10), preferably 16:12:7, and more preferably 16 parts of P3HB4HB, 12 parts of PLA and 7 parts of PBAT.

[0022] B) P3HB4HB, PPC and soybean protein fiber, wherein the mass ratio of P3HB4HB, PPC and soybean protein fiber is (10-15):(10-20):(5-10), preferably 13:16:6, and more preferably 13 parts P3HB4HB, 16 parts PPC and 6 parts soybean protein fiber.

[0023] C) P3HB4HB, seaweed fiber and PBS, wherein the mass ratio of P3HB4HB, seaweed fiber and PBS is (10-20):(10-15):(5-10), preferably 15:12:8, and more preferably 15 parts P3HB4HB, 12 parts seaweed fiber and 8 parts PBS;

[0024] D) P3HB4HB, PBA and PBT, wherein the mass ratio of P3HB4HB, PBA and PBT is (10-20):(5-15):(5-15), preferably 15:10:10, and more preferably 15 parts of P3HB4HB, 10 parts of PBA and 10 parts of PBT.

[0025] E) P3HB4HB, PLA and regenerated cellulose, wherein the mass ratio of P3HB4HB, PLA and regenerated cellulose is (5-15): (10-20): (5-15), preferably 10.5:15:9.5, and more preferably 10.5 parts of P3HB4HB, 15 parts of PLA and 9.5 parts of regenerated cellulose.

[0026] Preferably, the outer or inner auxiliary material independently includes one or more of the following: heat stabilizer, chain extender, antioxidant, nucleating agent, coupling agent, anti-hydrolysis agent, flame retardant, surfactant, or color masterbatch.

[0027] The heat stabilizer is selected from one or more of calcium stearate, zinc stearate, magnesium stearate, barium stearate, methyl mercaptoacetate, and heat stabilizer DP1100.

[0028] The chain extender is selected from one or more of chain extender X-U993, chain extender LK4468, chain extender ADR4400, and chain extender 6901;

[0029] The antioxidant is selected from one or more of antioxidant 1010, antioxidant 1024, antioxidant 1076, and antioxidant T501;

[0030] The nucleating agent is selected from one or more of tungsten disulfide, titanium boride, boron nitride, nano titanium dioxide, nano silica HB-630, hollow glass microspheres, and carbon nanotubes;

[0031] The coupling agent is selected from one or more of the following: titanate coupling agent AT1618, maleic anhydride, coupling agent BYKC8003, silane coupling agent A-172, silane coupling agent KH550, and silane coupling agent KH570.

[0032] The preferred materials are titanate coupling agent AT1618, maleic anhydride and silane coupling agent KH570.

[0033] In one specific embodiment of the present invention, the mixture comprises 0.5 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, and 0.25 parts of silane coupling agent KH570; or, 0.25 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, and 0.25 parts of silane coupling agent KH570.

[0034] For example, in the outer layer structure, there are 62.5 parts of P3HB4HB (4HB molar content 8%), 0.5 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, and 0.25 parts of silane coupling agent KH570.

[0035] For example, in the inner layer structure, there are 16 parts P3HB4HB (4HB molar content 15%), 12 parts PLA, 7 parts PBAT, 0.25 parts titanate coupling agent AT1618, 0.25 parts maleic anhydride, and 0.25 parts silane coupling agent KH570.

[0036] The preferred materials are titanate coupling agent AT1618, maleic anhydride and silane coupling agent KH550.

[0037] In one specific embodiment of the present invention, the mixture comprises 0.375 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, and 0.375 parts of silane coupling agent KH550; or, 0.25 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, and 0.25 parts of silane coupling agent KH550.

[0038] For example, in the outer layer structure, there are 50 parts of P3HB4HB (4HB molar content 5%), 12.5 parts of P3HB4HB (4HB molar content 20%), 0.375 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, and 0.375 parts of silane coupling agent KH550.

[0039] For example, in the inner layer structure, there are 13 parts P3HB4HB (4HB molar content 15%), 16 parts PPC, 6 parts soybean protein fiber, 0.25 parts titanate coupling agent AT1618, 0.25 parts maleic anhydride, and 0.25 parts silane coupling agent KH550.

[0040] The preferred self-coupling agents are BYKC8003, maleic anhydride, and silane coupling agent A-172.

[0041] In one specific embodiment of the present invention, the coupling agent is 0.25 parts of BYKC8003, 0.375 parts of maleic anhydride, and 0.375 parts of silane coupling agent A-172, or 0.2 parts of BYKC8003, 0.275 parts of maleic anhydride, and 0.275 parts of silane coupling agent A-172.

[0042] For example, in the outer layer structure, there are 5 parts of P3HB4HB (4HB molar content 5%), 57.5 parts of P3HB4HB (4HB molar content 10%), 0.25 parts of coupling agent BYKC8003, 0.375 parts of maleic anhydride, and 0.375 parts of silane coupling agent A-172.

[0043] For example, in the inner layer structure, there are 15 parts P3HB4HB (4HB molar content 15%), 12 parts seaweed fiber, 8 parts PBS, 0.2 parts coupling agent BYKC8003, 0.275 parts maleic anhydride, and 0.275 parts silane coupling agent A-172.

[0044] The anti-hydrolysis agent is selected from one or more of anti-hydrolysis agent 936, anti-hydrolysis agent HD900A, and anti-hydrolysis agent BTWR-500;

[0045] The flame retardant is selected from one or more of ammonium polyphosphate, triphenyl phosphate, and toluene diphenyl phosphate.

[0046] Preferred to be ammonium polyphosphate and / or triphenyl phosphate, and more preferably, the mass ratio of ammonium polyphosphate to triphenyl phosphate is 3:5 to 2:3.

[0047] For example, in the outer layer structure, there are 62.5 parts of P3HB4HB (4HB molar content 8%), 2 parts of ammonium polyphosphate, and 3 parts of triphenyl phosphate.

[0048] For example, in the inner layer structure, there are 16 parts of P3HB4HB (4HB molar content 15%), 12 parts of PLA, 7 parts of PBAT, 1.5 parts of ammonium polyphosphate, and 2.5 parts of triphenyl phosphate.

[0049] The preferred materials are triphenyl phosphate and / or toluene diphenyl phosphate, and more preferably, the mass ratio of triphenyl phosphate to toluene diphenyl phosphate is 11:5 to 7:3.

[0050] For example, in the outer layer structure, there are 50 parts of P3HB4HB (4HB molar content 5%), 12.5 parts of P3HB4HB (4HB molar content 20%), 3.5 parts of triphenyl phosphate, and 1.5 parts of toluene diphenyl phosphate.

[0051] For example, in the inner layer structure, there are 13 parts P3HB4HB (4HB molar content 15%), 16 parts PPC, 6 parts soybean protein fiber, 2.75 parts triphenyl phosphate, and 1.25 parts diphenyl toluene phosphate.

[0052] Preferred to be ammonium polyphosphate and / or toluene diphenyl phosphate.

[0053] For example, in the outer layer structure, there are 5 parts of P3HB4HB (4HB molar content 5%), 57.5 parts of P3HB4HB (4HB molar content 10%), 2.5 parts of ammonium polyphosphate, and 2.5 parts of diphenyl toluene phosphate.

[0054] For example, in the inner layer structure, there are 15 parts of P3HB4HB (4HB molar content 15%), 12 parts of seaweed fiber, 8 parts of PBS, 2 parts of ammonium polyphosphate, and 2 parts of toluene diphenyl phosphate.

[0055] The surfactant is selected from one or more of polyethylene glycol, polyvinyl alcohol, rhamnolipids, and quaternary ammonium salt surfactants; further, the polyethylene glycol is one or more of polyethylene glycol-3000, polyethylene glycol-6000, polyethylene glycol-10000, and polyethylene glycol-20000; the polyvinyl alcohol is one or more of polyvinyl alcohol 1799, polyvinyl alcohol 2099, polyvinyl alcohol 2499, and polyvinyl alcohol 2699; and the quaternary ammonium salt surfactant is one or more of benzyltriethylammonium chloride, didodecyldimethylammonium chloride, hexadecyltrimethylammonium chloride, and octadecyltrimethylammonium chloride.

[0056] Preferred from polyethylene glycol-6000 and / or rhamnolipid.

[0057] For example, in the outer layer structure, there are 62.5 parts of P3HB4HB (4HB molar content 8%) and 0.375 parts of polyethylene glycol-6000 and 0.375 parts of rhamnolipid. Or, in the outer layer structure, there are 62.5 parts of P3HB4HB (4HB molar content 8%) and 0.375 parts of rhamnolipid.

[0058] For example, in the inner layer structure, there are 16 parts P3HB4HB (4HB molar content 15%), 12 parts PLA, 7 parts PBAT, 0.25 parts polyethylene glycol-6000, and 0.25 parts rhamnolipid. Or, in the inner layer structure, there are 16 parts P3HB4HB (4HB molar content 15%), 12 parts PLA, 7 parts PBAT, and 0.25 parts rhamnolipid.

[0059] Preferred from polyvinyl alcohol-2099 and / or rhamnolipin.

[0060] For example, in the outer layer structure, there are 50 parts of P3HB4HB (4HB molar content 5%), 12.5 parts of P3HB4HB (4HB molar content 20%), 0.3 parts of polyvinyl alcohol-2099, and 0.45 parts of rhamnolipid.

[0061] For example, in the inner layer structure, there are 13 parts P3HB4HB (4HB molar content 15%), 16 parts PPC, 6 parts soybean protein fiber, 0.2 parts polyvinyl alcohol-2099, and 0.3 parts rhamnolipid.

[0062] Preferably derived from rhamnolipids and / or benzyltriethylammonium chloride.

[0063] For example, in the outer layer structure, there are 5 parts of P3HB4HB (4HB molar content 5%), 57.5 parts of P3HB4HB (4HB molar content 10%), 0.45 parts of rhamnolipid, and 0.3 parts of benzyltriethylammonium chloride.

[0064] For example, in the inner layer structure, there are 15 parts P3HB4HB (4HB molar content 15%), 12 parts seaweed fiber, 8 parts PBS, 0.3 parts rhamnolipid, and 0.2 parts benzyltriethylammonium chloride.

[0065] The masterbatch is a P3HB4HB base masterbatch with different color systems added as needed.

[0066] In one specific embodiment of the present invention, the outer layer structure (or its raw materials) comprises 62.5 parts of a copolymer of 3-hydroxybutyric acid (3HB) and 4-hydroxybutyric acid (4HB) P3HB4HB (4HB molar content 8%), and the inner layer structure (or its raw materials) comprises 16 parts of P3HB4HB (4HB molar content 15%), 12 parts of PLA, and 7 parts of PBAT. Preferably, the inner layer structure and / or the outer layer structure further comprises a coupling agent, a surfactant, and / or a flame retardant.

[0067] In one specific embodiment of the present invention, the outer layer structure (or its raw materials) comprises 50 parts of P3HB4HB (4HB molar content 5%) and 12.5 parts of P3HB4HB (4HB molar content 20%), and the inner layer structure (or its raw materials) comprises 13 parts of P3HB4HB (4HB molar content 15%), 16 parts of PPC, and 6 parts of soybean protein fiber. Preferably, the inner layer structure and / or the outer layer structure further comprises a coupling agent, a surfactant, and / or a flame retardant.

[0068] In one specific embodiment of the present invention, the outer layer structure (or its raw materials) comprises 5 parts P3HB4HB (5% mol content of 4HB) and 57.5 parts P3HB4HB (10% mol content of 4HB), and the inner layer structure (or its raw materials) comprises 15 parts P3HB4HB (15% mol content of 4HB), 12 parts seaweed fiber, and 8 parts PBS. Preferably, the inner layer structure and / or the outer layer structure further comprises a coupling agent, a surfactant, and / or a flame retardant.

[0069] In one specific embodiment of the present invention, the outer layer structure (or its raw materials) comprises 62.5 parts of P3HB4HB (4HB molar content 8%), and the inner layer structure (or its raw materials) comprises 15 parts of P3HB4HB (4HB molar content 10%), 10 parts of PBA, and 10 parts of PBT. Preferably, the inner layer structure and / or the outer layer structure further comprises a coupling agent, a surfactant, and / or a flame retardant.

[0070] In one specific embodiment of the present invention, the outer layer structure (or its raw materials) comprises 62.5 parts of P3HB4HB (4HB molar content 8%), and the inner layer structure (or its raw materials) comprises 10.5 parts of P3HB4HB (4HB molar content 20%), 15 parts of PLA, and 9.5 parts of regenerated cellulose. Preferably, the inner layer structure and / or the outer layer structure further comprises a coupling agent, a surfactant, and / or a flame retardant.

[0071] In one specific embodiment of the present invention, the outer layer structure (or its raw materials) comprises 62.5 parts of a copolymer of 3-hydroxybutyric acid (3HB) and 4-hydroxybutyric acid (4HB) P3HB4HB (4HB molar content 8%), 1 part of a coupling agent, 0.375 parts or 0.75 parts of a surfactant, and 5 parts of a flame retardant; and the inner layer structure (or its raw materials) comprises 16 parts of P3HB4HB (4HB molar content 15%), 12 parts of PLA, 7 parts of PBAT, 0.75 parts of a coupling agent, 0.25 parts or 0.5 parts of a surfactant, and 4 parts of a flame retardant.

[0072] In one specific embodiment of the present invention, the outer layer structure (or its raw materials) comprises 62.5 parts of a copolymer of 3-hydroxybutyric acid (3HB) and 4-hydroxybutyric acid (4HB) P3HB4HB (4HB molar content 8%), 0.5 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, 0.25 parts of silane coupling agent KH570, 2 parts of ammonium polyphosphate, 3 parts of triphenyl phosphate, 0.375 parts of polyethylene glycol-6000, and 0.375 parts of rhamnolipid; and the inner layer structure (or its raw materials) comprises 16 parts of P3HB4HB (4HB molar content 15%), 12 parts of PLA, 7 parts of PBAT, 0.25 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, and 0.25 parts of silane coupling agent KH570. 1.5 parts ammonium polyphosphate, 2.5 parts triphenyl phosphate, 0.25 parts polyethylene glycol-6000, and 0.25 parts rhamnolipid.

[0073] In one specific embodiment of the present invention, the composition includes 35-90 parts of outer substrate, 0-2.25 parts of chain extender, 0-1.5 parts of antioxidant, 0-4 parts of nucleating agent, 0-2.5 parts of heat stabilizer, 0-2 parts of coupling agent, 0-1.5 parts of anti-hydrolysis agent, 0-1.5 parts of surfactant, 0-10 parts of flame retardant, and 0-10 parts of color masterbatch, and 10-60 parts of inner substrate, 0-1.75 parts of chain extender, 0-1.5 parts of antioxidant, 0-4 parts of nucleating agent, 0-1.5 parts of heat stabilizer, 0-1.5 parts of coupling agent, 0-1 part of anti-hydrolysis agent, 0-1 part of surfactant, 0-8 parts of flame retardant, and 0-8 parts of color masterbatch.

[0074] Preferably, the wig has a core-skin type or an island type structure.

[0075] The outer layer is composed of a cortex or marine components, while the inner layer is composed of a core or island components.

[0076] In a second aspect, the present invention provides a method for preparing the above-mentioned wig, the method comprising melting and granulating the outer layer structure and the inner layer structure respectively, and then spinning, cooling, oiling and stretching and winding.

[0077] Preferably, after stretching and winding, the process also includes inspection, grading, and packaging to obtain composite PHA hair strands;

[0078] Preferably, the preparation method further includes a hair product manufacturing process, namely, the composite PHA wig strands are whipped, processed in a three-stage machine, post-processed, shaped, rehydrated, and packaged to obtain a wig with PHA as the base material.

[0079] Preferably, the barrel temperature for the outer layer structure melt granulation is any value between 130-210℃, more preferably any value between 150-190℃ or 155-185℃; for example, the barrel temperature is 130, 135, 140, 145, 150, 155, 160, 165, 170, 175, 180, 185, 190, 195, 200, 205, or 210℃.

[0080] Preferably, the air supply temperature for the outer layer structure melt granulation is any value between 18-65℃, and more preferably any value between 45-65℃ or 50-60℃; for example, the air supply temperature is 18, 20, 25, 30, 35, 40, 45, 50, 55, 60, or 65℃.

[0081] Preferably, the barrel temperature for the inner layer structure melt granulation is any value between 130-210℃, more preferably any value between 150-205℃ or 155-200℃; for example, the barrel temperature is 130, 135, 140, 145, 150, 155, 160, 165, 170, 175, 180, 185, 190, 195, 200, 205, or 210℃.

[0082] Preferably, the air supply temperature for the inner layer structure melt granulation is any value between 18-65℃, and more preferably any value between 25-60℃ or 30-55℃; for example, the air supply temperature is 18, 20, 25, 30, 35, 40, 45, 50, 55, 60, or 65℃.

[0083] Preferably, the spinning temperature is any value between 120-210℃, more preferably any value between 120-180℃ or 125-175℃; for example, 120, 125, 130, 135, 140, 145, 150, 155, 160, 165, 170, 175, 180, 185, 190, 195, 200, 205, 210℃.

[0084] Preferably, the pressure inside the melt metering pump during the spinning process is controlled to any value between 8 and 17 MPa, and more preferably any value between 10 and 15 MPa; for example, 8, 9, 10, 11, 12, 13, 14, 15, 16, and 17 MPa.

[0085] Preferably, the spinning speed is any value between 80 and 160 m / min, such as 80, 90, 100, 110, 120, 130, 140, 150, or 160 m / min.

[0086] Preferably, the temperature of the stretching and winding is set to any value in the range of 70-120°C, and more preferably any value in the range of 80-120°C or 85-120°C, such as 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120°C.

[0087] Preferably, the stretching speed of the stretching winding is any value in the range of 200-640 m / min, such as 200, 300, 400, 500, 600, and 640 m / min.

[0088] Preferably, the stretch ratio of the stretch winding is any value between 2.5 and 4, such as 2.5, 3, 3.5, and 4.

[0089] Preferably, the preparation method further includes shaping.

[0090] Preferably, the shaping is either curved hair shaping or straight hair shaping. Specifically, curved hair shaping preferably uses a steam-heated container shaping method, and straight hair shaping preferably uses a steam-heated container shaping method.

[0091] Further preferably, the temperature for setting the curly hair is any value in the range of 60-118℃, preferably any value in the range of 65-110℃ or 70-105℃, for example 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 118℃.

[0092] Further preferably, the setting time for the curly hair is any value between 15 and 70 minutes, preferably any value between 25 and 60 minutes, such as 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, and 70 minutes.

[0093] More preferably, the hair straightening temperature is any value in the range of 70-125℃, preferably any value in the range of 75-118℃ or 80-118℃, for example 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 118, 120, 125℃.

[0094] Further preferably, the hair straightening time is any value in the range of 20-75 min, preferably any value in the range of 30-65 min, such as 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75 min.

[0095] In one specific embodiment of the present invention, the preparation method includes the following steps:

[0096] Step 1: Weigh 35-90 (preferably 55-70) parts of outer layer substrate and 0-36 (preferably 12-24) parts of outer layer auxiliary material by weight, mix them, melt and cool them through a twin-screw extruder to granulate, wherein the barrel temperature is set to 130-210℃, and a ring blower is used with an air supply temperature of 18-65℃ to obtain outer layer granules;

[0097] Step 2: Weigh 10-60 (preferably 30-40) parts of inner layer substrate and 0-29 (preferably 10-19) parts of inner layer auxiliary material by weight, mix them, melt and cool them through a twin-screw extruder to granulate, wherein the barrel temperature is set to 130-210℃, and a ring blower is used with an air supply temperature of 18-65℃ to obtain inner layer granules;

[0098] Step 3: Vacuum dry the obtained outer and inner granules, and inject them into an extrusion device equipped with a heating device for melting. The granules are melt-extruded by a screw, and with the help of a composite spinneret with a core-shell or island-type structure, the outer granules are extruded as the skin or island component, and the inner granules are extruded as the core / island component, forming a complete composite PHA pre-oriented yarn. The spinning temperature is set to 120-210℃, the pressure in the melt metering pump is controlled at 8-17MPa, and the spinning speed is 80-160m / min.

[0099] Step 4: Cool the composite PHA pre-oriented yarn through a vertical 1-2m long ring-shaped air blowing channel, where the air supply temperature is 18-65℃;

[0100] Step 5: Apply oil to the cooled composite PHA pre-oriented yarn from Step 4 using an oil roller;

[0101] Step 6: Feed the oiled composite PHA pre-oriented yarn from Step 5 into a hot roller and winding device for stretching and winding. Control the stretching temperature to be 70-120℃, the stretching and winding speed to be 200-640m / min, and the stretching ratio to be 2.5-4. The resulting finished yarn is wound onto a bobbin.

[0102] The preferred method also includes step seven: inspecting, grading, and packaging the full roll of hair obtained in step six to obtain composite PHA hair strands.

[0103] The preferred method also includes step eight: processing the composite PHA hair strands through a three-stage machine, post-processing, shaping, rehydration, and packaging to obtain a PHA-based wig.

[0104] Preferably, in step eight, the styling is either curl styling or straight hair styling; wherein,

[0105] The curvature is set in a steam chamber at a temperature of 60-118℃ for 15-70 minutes.

[0106] The direct setting method uses a steam chamber for setting at a temperature of 70-125℃ for 20-75 minutes.

[0107] In one specific embodiment of the present invention, the preparation method includes:

[0108] Step 1: Vacuum dry each raw material at 70-100℃ for 6-12 hours to control the moisture content below 0.5%;

[0109] Step 2: Weigh 35-90 (preferably 62.5) parts by weight of outer layer substrate, 0-2.25 parts by weight of chain extender, 0-1.5 parts by weight of antioxidant, 0-4 parts by weight of nucleating agent, 0-2.5 parts by weight of heat stabilizer, 0-2 parts by weight of coupling agent, 0-1.5 parts by weight of anti-hydrolysis agent, 0-1.5 parts by weight of surfactant, 0-10 parts by weight of flame retardant, and 0-10 parts by weight of color masterbatch, and physically mix them. Melt and cool the mixture using a twin-screw extruder, set the barrel temperature to 130-210℃, use a ring blower, and use an air supply temperature of 18-65℃ to obtain outer layer granules.

[0110] Weigh 10 to 60 (preferably 35) parts of inner layer substrate, 0-1.75 parts of chain extender, 0-1.5 parts of antioxidant, 0-4 parts of nucleating agent, 0-1.5 parts of heat stabilizer, 0-1.5 parts of coupling agent, 0-1 part of anti-hydrolysis agent, 0-1 part of surfactant, 0-8 parts of flame retardant, and 0-8 parts of color masterbatch and physically mix them. Melt and cool the mixture through a twin-screw extruder and granulate it. Set the barrel temperature to 130-210℃ and use ring blowing with an air supply temperature of 18-65℃ to obtain inner layer granules.

[0111] Step 3: After vacuum drying the outer and inner granules at 70-100℃ for 1-4 hours, they are injected into an extrusion device equipped with a heating device for melting and extrusion by a screw. The sheath / sea component and core / island component of the composite PHA pre-oriented yarn are then extruded using a composite spinneret with a sheath / core or island structure. The spinning temperature is set to 120-210℃, the pressure in the melt metering pump is controlled at 8-17MPa, and the spinning speed is 80-160m / min to obtain the composite PHA pre-oriented yarn.

[0112] Step 4: Cool the composite PHA pre-oriented yarn through a vertical 1-2m long ring-shaped air blowing channel, with an air supply temperature of 18-65℃.

[0113] Step 5: Apply oil to the composite PHA pre-oriented yarn obtained from step 4 by passing it through an oil roller.

[0114] Step 6: Feed the composite PHA pre-oriented yarn obtained from oiling in Step 5 into a hot roller and winding device for stretching and winding. Control the stretching temperature to be 70-120℃, the stretching and winding speed to be 200-640m / min, and the stretching ratio to be 2.5-4. The resulting finished yarn is wound onto a bobbin.

[0115] Step 7: The full rolls obtained in Step 6 are inspected, graded, and packaged to obtain composite PHA hair strands;

[0116] Step 8: The composite PHA hair strands are whipped, processed using a three-stage machine, post-processed, shaped, rehydrated, and packaged to obtain a PHA-based wig.

[0117] A third aspect of the present invention provides an application of the above-described wig in the manufacture of hair-related products, examples of which include any artificial hair-related products such as wigs, hair extensions, false eyelashes, false beards, or hair used in the creation of dolls.

[0118] The abbreviations and full names of this invention are shown in Table 1.

[0119] Table 1: Comparison of Abbreviations and Full Names

[0120]

[0121]

[0122] Beneficial effects:

[0123] 1. The wig fibers of this invention have a core-skin type or island-island type structure. Human hair consists of an epidermal cuticle layer, a main cortex layer, and a central medulla layer. During wig manufacturing, it requires descaling treatment such as acid washing, thus primarily consisting of two layers. The core-skin type or island-island type structure of this application fully mimics human hair, closely resembling it at a microscopic level, and possesses the characteristics of various materials in both the cortex / island component and the core / island component. The wig is soft on the outside and tough on the inside, with greater strength than human hair. The hollow glass microspheres added to the core / island component further reduce the fiber weight, making the final wig lighter and more comfortable.

[0124] 2. The wig fibers can be pre-dyed by adding color masterbatch during preparation, resulting in a uniform and translucent dye that closely resembles human hair. This eliminates the need for acid washing and bleaching steps in traditional hair product manufacturing, saving manpower and resources while reducing pollution caused by bleaching the wig fibers. Furthermore, the wig exhibits excellent dyeability and can be re-dyed and faded during subsequent use, with consistent color changes under the same conditions. This significantly improves the reusability of the wig and enhances the user experience.

[0125] 3. The wig of this invention is entirely biodegradable in its main components. Because PHA constitutes the largest proportion, even with the presence of other biodegradable materials, the environmental requirements for degradation are significantly reduced, while the degradation rate is greatly increased. The entire process from raw material selection to manufacturing is non-toxic, green, environmentally friendly, and sustainable.

[0126] 4. Using PHA as the main raw material eliminates the use of synthetic fiber materials and avoids the raw material shortage problem faced by human hair and animal hair. At the same time, it is more economical and provides a better user experience, and can completely replace synthetic fiber wigs.

[0127] 5. The wig described in this application has skin-friendly properties and excellent biocompatibility. Therefore, when users wear the wig, they will not experience any adverse experiences such as itching, stinging, burning, allergies, dryness, static electricity, or lack of breathability. Compared with traditional synthetic fiber wigs, the comfort of use is greatly improved, and the user experience is closer to that of human hair.

[0128] 6. The wig of the present invention, through the PHA modern spinning process, makes it possible to realize continuous and automated wig production, thereby greatly improving production efficiency; moreover, the styling method is more uniform, regardless of whether the hair is straight or curly; the styling temperature is much lower than that of human hair, and the styling time is also greatly shortened, thereby saving energy and reducing emissions, reducing costs, and partially replacing human hair in wig production, thus revolutionizing the wig industry.

[0129] 7. The wig of this invention degrades extremely slowly during normal use, similar to the wear and tear of real hair, thus having a long service life, close to that of human hair. It only degrades rapidly when discarded and placed in natural environments such as soil, rivers, lakes, or oceans. Furthermore, wigs made with PHA as the base material offer faster and more convenient styling, and the material itself has a high specific heat capacity, meaning that repeated switching between straight and curly styles does not result in significant performance degradation. This excellent durability for repeated styling provides users with a better experience and greater economic value.

[0130] 8. The wig of this invention has a surface moisture content similar to that of human hair. This is due to the hydrophilic modification of the wig substrate by coupling agents and surfactants, which makes its moisture absorption slightly better and similar to that of human hair. These two types of additives have a synergistic effect, and combined with the hydrophobic properties of PHA itself, the wig strands have a more hydrophilic surface and a more hydrophobic interior, thus making the wig substrate more breathable, with good moisture permeability and breathability, and easier to dry than human hair, resulting in better overall performance than human hair.

[0131] 9. The wigs of this invention primarily use environmentally friendly, non-toxic, bio-based, and biocompatible additives. In particular, the use of a bio-based surfactant—rhamnolipid—unexpectedly resulted in a synergistic effect with the PHA main material, making the PHA-based wigs more skin-friendly and moisturizing. All flame retardants used are phosphorus-based environmentally friendly flame retardants; their reasonable proportions result in excellent flame retardant performance without affecting the mechanical properties of the PHA-based wigs. Attached Figure Description

[0132] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings, wherein:

[0133] Figure 1 : Cross-sectional structure diagram of wig strands, where 1-cortex, 2-core, 3-marginal component, 4-island component.

[0134] Figure 2 : Compare with the wig made of real human hair from a certain brand in Example 1.

[0135] Figure 3 Compare with Example 2, which shows a wig made from protein fiber as the base material by a certain brand.

[0136] Figure 4 Compare with Example 3, which shows a wig made from PAN as the base material by a certain brand.

[0137] Figure 5 : The wig made in Comparison Example 4. Detailed Implementation

[0138] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0139] Tests, specific methods, and references used in the embodiments

[0140] I. Test

[0141] 1. Basic properties: fineness, single filament breaking strength;

[0142] 2. Subjective evaluation: softness, smoothness (straight hair and curly hair are evaluated separately), volume, and shine;

[0143] 3. Processing and usage performance: crimp fastness, combing resistance, repeatable shaping durability, monofilament breaking strength after crimping, dyeing effect, repeat dyeing durability, and water content;

[0144] 4. Special properties: antistatic, breathable, flame retardant, heat resistant, antibacterial, anti-mite, and fast degradation.

[0145] 5. Safety and hygiene performance: Its performance is comprehensively evaluated based on pH value, formaldehyde content, decomposable aromatic amine content, odor, etc.

[0146] II. Testing Methods

[0147] 1. Basic performance

[0148] Fineness (dtex): The average fineness index of the fiber is calculated using the mid-section cutting and weighing method. The fiber is combed into a bundle with one end flat and parallel straight. Then, a 10mm long fiber bundle is cut from the middle of the fiber using a fiber cutter. The cut fiber bundle is then weighed on a balance, and the total number of fibers in the bundle is counted. Based on the number of fibers, weight, and cut length, the average fineness of the fiber can be calculated.

[0149] Monofilament breaking strength (cN): Tested according to the method in GB / T 13835.5 "Test methods for rabbit hair fibers - Part 5: Breaking strength and elongation at break of single fibers", and the results were calculated according to method "9.1".

[0150] 2. Subjective evaluation

[0151] Softness, smoothness (straight and curly hair were evaluated separately), volume, and shine: a subjective evaluation method was used, and two groups of people were selected as subjects.

[0152] One group consists of 10 experts or experienced subjects, with a weight of 1. They are familiar with the scales and descriptive terms used in subjective testing, understand the human sensations corresponding to each level in the terminology, and can quickly and accurately evaluate and quantify the performance of wigs. They are front-line staff or hair product fiber material R&D personnel with more than three consecutive years of work experience in hair product companies.

[0153] Another group consisted of 10 consumers who had received minimal training, with a weighting of 0.5. Prior to the experiment, these participants received instruction on fiber performance and evaluation terminology to ensure they could accurately assess the performance of the wig fibers and guarantee the rigor of the results.

[0154] Experimental conditions: temperature 20℃±2℃, relative humidity 65%±2%, wind speed ≤0.1m / s.

[0155] The performance evaluation scales and descriptive terms are shown in Table 2-5.

[0156] Table 2: Subjective Evaluation Scale for Softness

[0157]

[0158] Table 3: Subjective Evaluation Scale for Smoothness

[0159]

[0160] Table 4: Subjective Evaluation Scale for Fluffiness

[0161]

[0162] Table 5: Subjective Evaluation Scale for Glossiness

[0163]

[0164]

[0165] 3. Processing and performance

[0166] Crimp strength refers to the property of fibers to maintain their crimped shape when subjected to external force. The index reflecting crimp strength is expressed as the plastic deformation rate, which is the percentage change in crimp length relative to the fiber length after repeated loading and unloading. Therefore:

[0167] Plastic deformation rate after first loading and unloading

[0168]

[0169] Where: L0—the length of the fiber naturally hanging down (mm);

[0170] L1 – The length (mm) of the fiber after being unloaded and allowed to hang naturally for 2 minutes following the first 30 minutes of being under load.

[0171] Plastic deformation rate after the second loading and unloading

[0172]

[0173] In the formula: L2——the length (mm) of the fiber after being unloaded and naturally hanging for 2 minutes after being held under load for 30 minutes.

[0174] And so on, the plastic deformation rate after the nth loading and unloading

[0175]

[0176] In the formula: L n — The length (mm) of the fiber after being unloaded for 30 minutes under load for the nth time and then naturally hanging for 2 minutes.

[0177] To more comprehensively characterize the curl retention of hair under external force during use, this patent simulates three stress models on the hair wig, namely:

[0178] ① Loading and unloading effects, simulating hand touching or pulling during use, the specific method is as follows:

[0179] A single, shaped hair strand was extracted and its natural hanging length L0 was measured. A constant load (3.67g) was then applied to the hair strand, unloaded after 30 minutes, and allowed to recover for 2 minutes. The length L1 of the hair strand after one loading and unloading cycle was then measured again. The loading and unloading process was repeated, and the lengths L2, L3, L4, L5, L6, and L7 of the hair strand after several loading and unloading cycles were measured sequentially. The plastic deformation rate of the hair strand was calculated according to the formula, and the result was taken as the average of 5 hair strands.

[0180] ② Combing action (30 times per cycle): Simulates combing when using a wig. The specific method is as follows:

[0181] Select a set of hair strands (about 300 strands), measure its natural hanging length L0, and then comb it evenly and slowly (10-20cm / s) from the top to the bottom of the hair strands. Comb the hair strands for 7 cycles as required by the experiment, with 30 times per cycle and a 2-hour interval between cycles. Measure and record the length of the hair strands 15 minutes after each cycle, which are L1, L2, L3, L4, L5, L6, and L7. Calculate the fiber plastic deformation rate according to the formula, and take the average value of 5 hair strands as the result.

[0182] ③ Water washing effect, simulating the water washing process when using a wig, the specific method is as follows:

[0183] Select approximately 300 pre-shaped hair strands and measure their natural hanging length L0. Gently wig the strands in a constant-temperature water bath, avoiding rubbing to ensure uniformity. Set the washing temperature to 30℃ and the washing time to 20 minutes. Wash the hair strands 1, 2, 3, 4, 5, 6, and 7 times as required for the experiment. After drying horizontally in a 40℃ oven for 2 hours, remove the strands and measure and record the lengths as L1, L2, L3, L4, L5, L6, and L7. Calculate the fiber plastic deformation rate using the formula, and take the average of the five hair strands. Then:

[0184] When L i If ≥4% of the values ​​in (i = 1, 2, ..., 7) are present, the curling strength is judged to be very poor.

[0185] When L i (i = 1, 2, ..., 7) are all < 4%, but there are ≥ 3.25%, indicating poor curling strength;

[0186] When L i (i = 1, 2, ..., 7) are all < 3.25%, but there are ≥ 2.5%, so the curling strength is judged to be average;

[0187] When L i (i = 1, 2, ..., 7) are all < 2.5%, but there are ≥ 1.75%, which indicates good curling strength;

[0188] When L i (i = 1, 2, ..., 7) are all < 1.75%, indicating excellent curl fastness.

[0189] Combing resistance: This refers to the wig's ability to withstand frequent combing, and the fact that even after being damaged by combing, it can be restored to its original state by using a hair straightener or ironing.

[0190] The specific evaluation method is as follows: Select three bundles of styled hair wigs (approximately 300 hairs per bundle), count the total number of hairs A0 and the number of damaged hairs D0, then comb the hair wig bundles evenly from top to bottom (20-40 cm / s). Comb the hair wig bundles for 10 cycles as required by the experiment, 50 times per cycle, with a 2-hour interval between cycles. Starting 15 minutes after each cycle, count and record the total number of hairs and the number of damaged hairs, denoted as A1-A0. 10 D1-D 10 .but:

[0191] When there are 2 or 3 bundles of hair strands in D i / A i (i = 1, 2, ..., 10) exist with a value ≥ 5%, or D i / D i-1 If ≤95% of the hair strands are present, the combing resistance of the wig is deemed unqualified.

[0192] When there are two bundles of wig hair strands in D i / A i (i = 1, 2, ..., 10) are all < 5%, and D i / D i-1 Only when all percentages are greater than 95% can the combing resistance of the wig be deemed acceptable;

[0193] When the D of 3 bundles of wig hair i / A i (i = 1, 2, ..., 10) are all < 5%, and D i / D i-1 When all percentages are greater than 95%, the combing resistance of the wig is considered good;

[0194] For hair strands that have been properly treated, use a flat iron or iron to restore more than 0.5D of damaged hair. 10 The hair strands were found to have excellent combability.

[0195] Repeatable styling durability: refers to the property of a wig that can be repeatedly adapted to straight or curly hair.

[0196] The specific evaluation method is as follows: Select a bundle of approximately 1000 straight hair wig strands (uniformly thin), and test the single-filament breaking strength of 100 strands. The average value is recorded as F0. The hair is then curled according to the styling process requirements. After 24 hours, it is straightened again according to the same process. This constitutes one styling cycle. Five styling cycles are performed. After each cycle, 100 strands are randomly selected to test the single-filament breaking strength, and the average values ​​are recorded as F1, F2, ..., F... 10 .but:

[0197] When F i / F i-1 (i = 1, 2, ..., 10) There exists ≤90% or F 10 When / F0 < 60%, the repeatability durability of the wig is deemed unqualified.

[0198] When F i / F i-1 (i = 1, 2, ..., 10) are all greater than 90% and 60% ≤ F 10 When / F0 < 70%, the repeatability and durability of the wig are deemed acceptable.

[0199] When F i / F i-1 (i = 1, 2, ..., 10) are all greater than 90% and 70% ≤ F 10 When / F0 < 80%, the repeatability and durability of the wig are considered good.

[0200] When F i / F i-1 (i = 1, 2, ..., 10) are all > 90% and F 10 When / F0≥80%, the wig is judged to have excellent repeatability and durability.

[0201] Curling monofilament breaking strength: Select a bundle of straight hair wigs (about 300 strands, uniform in fineness) that has been set, and curl them according to the setting process requirements. After 24 hours, extract 100 strands of the wig and test their monofilament breaking strength according to the method in "GB / T 13835.5 Rabbit hair fiber test method part 5: single fiber breaking strength and breaking elongation".

[0202] Dyeing / fading effect: refers to the property that the color change is uniform and consistent after the same batch of wigs is faded or dyed under the same conditions.

[0203] The specific evaluation method is as follows: Select three bundles of black straight hair wigs (approximately 1000 strands, uniformly fine) that have been styled. Bleaching or dyeing is performed according to the hair dyeing process requirements. The uniformity of the bleaching or dyeing changes is scored, and the average score is taken. Two groups of people (10 each) are selected as subjects, as described in "2. Subjective Evaluation". The performance evaluation scale and descriptive terms for the dyeing / bleaching effect are shown in Table 6.

[0204] Table 6: Evaluation Scale for Dyeing / Fading Effects

[0205]

[0206]

[0207] Repeat dyeing durability: refers to the property that the wig strands can be faded and dyed; and that the color change is uniform and consistent after the same batch of wig strands has been faded or dyed multiple times under the same conditions.

[0208] The specific evaluation method is as follows: Select three bundles of well-shaped, straight black hair wigs (approximately 1000 strands, uniformly fine). Following the hair dyeing process, first bleach the hair, then dye it again after 72 hours. This constitutes one dyeing cycle. Perform three repeated dyeing cycles (each cycle using a different color). After each cycle, evaluate the bleaching and dyeing effects according to the scale in Table 6. Therefore:

[0209] When each bundle of hair strands does not have uniform dyeing in all three cycles (i.e., each bundle of hair strands has a dyeing effect of <4 points in one cycle), the repeated dyeing durability of the hair strands is unqualified.

[0210] When the dyeing of 1 or 2 bundles of hair is uniform in 3 cycles (i.e., the dyeing effect of 1 or 2 bundles of hair in 3 cycles is ≥4 points), the repeat dyeing durability of the hair is qualified.

[0211] When the dyeing of the three hair strands is uniform in all three cycles (i.e., the dyeing effect of the three hair strands in all three cycles is ≥4 points), the repeated dyeing durability of the hair strands is good.

[0212] When the dyeing of the three hair strands is uniform in all three cycles and the fading is also uniform in all three cycles (i.e., the dyeing and fading effects of the three hair strands are all ≥4 points), the repeated dyeing durability of the hair strands is excellent.

[0213] Moisture content: This is assessed by the contact angle between the wig strands and deionized water; a smaller contact angle indicates better moisture content. Samples were prepared by arranging over 100 wig strands in parallel and close proximity. The samples were tested using an OCA40 fully automated fiber contact angle measuring instrument from Data Physics, Germany. The results were averaged from five different sampling points. Therefore:

[0214] When the water contact angle is less than 30°, the wettability is considered excellent.

[0215] When 30 ≤ water contact angle < 45°, the wettability is considered good.

[0216] When 45° ≤ water contact angle < 60°, the wettability is considered average.

[0217] When 60° ≤ water contact angle < 75°, the wettability is considered poor.

[0218] When the water contact angle is greater than 75°, the wettability is considered very poor.

[0219] 4. Special performance

[0220] Antistatic properties: assessed by mass resistivity, which refers to the resistance when current passes through a fiber bundle with a length of 1 cm and a mass of 1 g. The test was conducted using an LFY-405 fiber resistivity meter, and the result is the average of 5 samples.

[0221] Breathability: Tested according to the method in GB / T 40357-2021 "Determination of breathability of hair products and wigs", and the average value of at least 5 points is taken.

[0222] Flame retardancy: Flame retardancy is characterized by the limiting oxygen index, and the test is conducted according to the method in FZ / T 50017-2011 "Test Method for Flame Retardant Properties of Polyester Fibers - Oxygen Index Method".

[0223] Heat resistance: Heat resistance is assessed by the breaking strength of a single filament at high temperature (100℃).

[0224] Antibacterial properties: The antibacterial properties of textiles were tested according to the method in GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles - Part 3: Shaking method" to obtain the inhibition rate against Staphylococcus aureus and Escherichia coli.

[0225] Anti-mite properties: The repellency rate was tested according to the "repellency method" in GB / T 24259-2009 "Evaluation of anti-mite performance of functional fibers".

[0226] Degradation rate:

[0227] The degradation rate during use was measured by testing the percentage of mass loss of the wig bundles (more than 1000 strands) obtained in the corresponding examples and control examples after 6 months of normal use by 10 people (wearing time ≥4 hours per day, washing once a day, drying and storing in a plastic bag when not in use, and collecting fallen wig strands).

[0228] The degradation rate after disposal was determined by referring to the test method for "biodegradability" in EN 13432, specifically the mass ratio of water, carbon dioxide, and minerals that were ultimately converted into wig bundles (more than 1000 strands) obtained in the corresponding examples and control examples after 6 months of aerobic composting.

[0229] 5. Safety and hygiene performance

[0230] pH value: Tested according to the method in GB / T 7573-2009 "Determination of pH value of water extract of textiles".

[0231] Formaldehyde content: The test was conducted in accordance with the methods in GB / T 2912.1-2009 "Determination of formaldehyde in textiles - Part 1: Free and hydrolyzed formaldehyde (water extraction method)" and GB / T 2912.3-2009 "Determination of formaldehyde in textiles - Part 3: High performance liquid chromatography".

[0232] Content of decomposable aromatic amines: Tested according to the methods in GB / T 17592-2011 "Determination of prohibited azo dyes in textiles" and GB / T23344-2009 "Determination of 4-aminoazobenzene in textiles".

[0233] Odor: Tested according to method 5.3.3 in GB / T 23170-2019 "Hair Products, Wigs and Headwear".

[0234] III. Referenced Test Standards and Literature:

[0235] Xuchang Hongyang Biochemical Industry Development Co., Ltd. Biodegradable polylactic acid fiber for wigs and its production process [P]. CN:201210406770.7,2012.

[0236] Xuchang Hongyang Biochemical Industry Development Co., Ltd. A biodegradable antibacterial and flame-retardant PLA wig fiber and its preparation method [P]. CN:202010734342.1,2020.

[0237] Xuchang Hongyang Biochemical Industry Development Co., Ltd. Degradable Antibacterial and Flame-Retardant Wig Fiber Based on PLA and Its Preparation Method [P]. CN:202010734831.7,2020.

[0238] Kaneka Chemical Industry Co., Ltd. Improved Regenerated Collagen Fiber and Manufacturing Method [P]. CN:98117804.9, 1998.

[0239] Kaneka Chemical Industry Co., Ltd. Regenerated Collagen Fiber with Excellent Heat Resistance [P]. CN:00810216.3, 2000.

[0240] Chen Weitai, Sun Runjun. Discussion on tensile mechanical properties of wig fibers [J]. Journal of Xi'an University of Engineering, 2010, (1):21-25

[0241] Li Ke, Ye Ting, Jiang Jing, Wang Shaofei. Preparation and performance study of protein / cellulose blend yarn for wigs [J]. Shanghai Textile Science & Technology, 2018, Vol. 46(2): 14-18, 21

[0242] Chen Wenjun. Research on the structure and properties of fibers for wigs [D]. Xi'an University of Engineering, 2016.

[0243] Zheng Yang,Chen JC,Ma YM,Chen GQ.Engineering Biosynthesis ofPolyhydroxyalkanoates(PHA) for Diversity and Cost Reduction.MetabolicEngineering 58(2020)82-93(10.1016 / j.ymben.2019.07.004)

[0244] GB / T 2912.1-2009, Textiles - Determination of formaldehyde - Part 1: Free and hydrolyzed formaldehyde (water extraction method) [S].

[0245] GB / T 2912.3-2009, Determination of formaldehyde in textiles - Part 3: High performance liquid chromatography [S].

[0246] GB / T 7573-2009, Determination of pH value of aqueous extracts of textiles [S].

[0247] GB / T 13835.5-2009, Rabbit hair fiber test methods - Part 5: Single fiber breaking strength and elongation at break [S].

[0248] GB / T 17592-2011, Determination of prohibited azo dyes in textiles [S].

[0249] GB / T 20944.3-2008, Evaluation of antimicrobial properties of textiles - Part 3: Vibration method [S].

[0250] GB / T 23170-2019, Hair Products, Wigs, Headpieces and Hair Accessories [S].

[0251] GB / T 23344-2009, Determination of 4-aminoazobenzene in textiles [S].

[0252] GB / T 24259-2009, Evaluation of the anti-mite performance of functional fibers [S].

[0253] GB / T 40357-2021, Determination of air permeability of hair products (wigs) [S].

[0254] FZ / T 50017-2011, Test method for flame retardant properties of polyester fiber: oxygen index method [S].

[0255] T / ZZB 1605-2020, Flame-retardant polyester hair for wigs [S].

[0256] Example 1

[0257] All raw materials are vacuum dried at 70-100℃ for 8-10 hours to control the moisture content to below 0.5%;

[0258] Step 1: Weigh out the following components by weight: 62.5 parts P3HB4HB (4HB molar content 8%), 0.625 parts chain extender X-U993, 0.5 parts chain extender ADR4400, 0.5 parts antioxidant 1010, 0.25 parts antioxidant 1076, 0.25 parts tungsten disulfide, 0.5 parts titanium boride, and 1.25 parts... 0.5 parts of nano-silica HB-630, 0.75 parts of calcium stearate, 0.5 parts of zinc stearate, 0.5 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, 0.25 parts of silane coupling agent KH570, 0.25 parts of anti-hydrolysis agent HD900A, 0.5 parts of anti-hydrolysis agent BTWR-500, 0.375 parts of polyethylene glycol-6000, 0.375 parts of rhamnolipid, 2 parts of ammonium polyphosphate, 3 parts of triphenyl phosphate, and 5 parts of color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder. The barrel temperature is set to 155-185℃, and a ring blower is used with an air supply temperature of 50-60℃ to obtain the outer layer granules.

[0259] Step 2: Weigh out 16 parts of P3HB4HB (4HB molar content 15%), 12 parts of PLA, 7 parts of PBAT, 0.5 parts of chain extender X-U993, 0.375 parts of chain extender ADR4400, 0.5 parts of antioxidant 1010, 0.25 parts of antioxidant 1076, 1.25 parts of hollow glass microspheres, 0.75 parts of boron nitride, 0.5 parts of calcium stearate, 0.25 parts of zinc stearate, 0.25 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, 0.25 parts of silane coupling agent KH570, 0.25 parts of anti-hydrolysis agent HD900A, 0.25 parts of anti-hydrolysis agent BTWR-500, 0.25 parts of polyethylene glycol-6000, and 0.25 parts of other ingredients. 1 part rhamnolipin, 1.5 parts ammonium polyphosphate, 2.5 parts triphenyl phosphate, and 4 parts color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder, with the barrel temperature set at 155-200℃ and a ring blower used with an air supply temperature of 30-55℃ to obtain the inner layer granules.

[0260] Step 3: After vacuum drying the outer and inner granules at 70-100℃ for 2-3 hours, inject them separately into an extrusion device equipped with a heating device for melting and extrusion through a screw, combined with a core or island structure (see...). Figure 1 The composite spinneret separately spins out the skin / sea component and core / island component to form composite PHA pre-oriented yarn. The spinning temperature is set to 125-175℃, the pressure inside the melt metering pump is controlled at 10-15MPa, and the spinning speed is 80-160m / min to obtain composite PHA pre-oriented yarn.

[0261] Step 4: Cool the composite PHA pre-oriented yarn through a vertical 1-2m long ring-blowing channel, with an air supply temperature of 30-55℃;

[0262] Step 5: Apply oil to the composite PHA pre-oriented yarn obtained from step 4 by passing it through an oil roller;

[0263] Step 6: The composite PHA pre-oriented yarn obtained from oiling in Step 5 is fed into a hot roller and winding device for stretching and winding. The stretching temperature is controlled at 85-120℃, the stretching and winding speed is 200-640m / min, and the stretching ratio is 2.5-4. The resulting finished yarn is wound on a bobbin.

[0264] Step 7: The full rolls obtained in Step 6 are inspected, graded, and packaged to obtain composite PHA hair strands;

[0265] The composite PHA wig fibers are processed through a three-stage machine, post-processing, styling, re-moistening, and packaging. For curly hair, a steam oven is used for styling, with a temperature of 70-105℃ and a styling time of 25-60 minutes. For straight hair, a steam oven is used for styling, with a temperature of 80-118℃ and a styling time of 30-65 minutes, thus producing a wig with PHA as the base material.

[0266] Example 2

[0267] All raw materials are vacuum dried at 70-100℃ for 8-10 hours to control the moisture content to below 0.5%;

[0268] Step 1: Weigh out the following by mass: 50 parts P3HB4HB (4HB molar content 5%), 12.5 parts P3HB4HB (4HB molar content 20%), 0.5 parts chain extender LK4468, 0.625 parts chain extender ADR4400, 0.5 parts antioxidant 1024, 0.25 parts antioxidant 1076, 0.375 parts tungsten disulfide, 0.375 parts boron nitride, and 1.25 parts... Nano-silica HB-630, 0.75 parts calcium stearate, 0.5 parts magnesium stearate, 0.375 parts titanate coupling agent AT1618, 0.25 parts maleic anhydride, 0.375 parts silane coupling agent KH550, 0.375 parts hydrolysis inhibitor HD900A, 0.375 parts hydrolysis inhibitor 936, 0.3 parts polyvinyl alcohol-2099, 0.45 parts rhamnolipid, 3.5 parts triphenyl phosphate, 1.5 parts diphenyl toluene phosphate, and 5 parts color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder. The barrel temperature is set to 155-185℃, and a ring blower is used with an air supply temperature of 50-60℃ to obtain the outer layer granules.

[0269] Step 2: Weigh out 13 parts P3HB4HB (4HB molar content 15%), 16 parts PPC, 6 parts soybean protein fiber, 0.375 parts chain extender LK4468, 0.5 parts chain extender ADR4400, 0.5 parts antioxidant 1024, 0.25 parts antioxidant 1076, 1.5 parts hollow glass microspheres, 0.5 parts carbon nanotubes, 0.4 parts calcium stearate, 0.35 parts heat stabilizer DP1100, 0.25 parts titanate coupling agent AT1618, and 0.25 parts... 0.25 parts maleic anhydride, 0.25 parts silane coupling agent KH550, 0.25 parts anti-hydrolysis agent HD900A, 0.25 parts anti-hydrolysis agent 936, 0.2 parts polyvinyl alcohol-2099, 0.3 parts rhamnolipid, 2.75 parts triphenyl phosphate, 1.25 parts diphenyl toluene phosphate, and 4 parts color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder. The barrel temperature is set to 155-200℃, and a ring blower is used with an air supply temperature of 30-55℃ to obtain the inner layer granules.

[0270] Step 3: After vacuum drying the outer and inner granules at 70-100℃ for 2-3 hours, inject them separately into an extrusion device equipped with a heating device for melting and extrusion through a screw, combined with a core or island structure (see...). Figure 1 The composite spinneret separately spins out the skin / sea component and core / island component to form composite PHA pre-oriented yarn. The spinning temperature is set to 125-175℃, the pressure inside the melt metering pump is controlled at 10-15MPa, and the spinning speed is 80-160m / min to obtain composite PHA pre-oriented yarn.

[0271] Step 4: Cool the composite PHA pre-oriented yarn through a vertical 1-2m long ring-blowing channel, with an air supply temperature of 30-55℃;

[0272] Step 5: Apply oil to the composite PHA pre-oriented yarn obtained from step 4 by passing it through an oil roller;

[0273] Step 6: The composite PHA pre-oriented yarn obtained from oiling in Step 5 is fed into a hot roller and winding device for stretching and winding. The stretching temperature is controlled at 85-120℃, the stretching and winding speed is 200-640m / min, and the stretching ratio is 2.5-4. The resulting finished yarn is wound on a bobbin.

[0274] Step 7: The full rolls obtained in Step 6 are inspected, graded, and packaged to obtain composite PHA hair strands;

[0275] The composite PHA wig fibers are processed through a three-stage machine, post-processing, styling, re-moistening, and packaging. For curly hair, a steam oven is used for styling, with a temperature of 70-105℃ and a styling time of 25-60 minutes. For straight hair, a steam oven is used for styling, with a temperature of 80-118℃ and a styling time of 30-65 minutes, thus producing a wig with PHA as the base material.

[0276] Example 3

[0277] All raw materials are vacuum dried at 70-100℃ for 8-10 hours to control the moisture content to below 0.5%;

[0278] Step 1: Weigh out 5 parts by weight of P3HB4HB (4HB molar content 5%), 57.5 parts by weight of P3HB4HB (4HB molar content 10%), 0.4 parts by weight of chain extender 6901, 0.725 parts by weight of chain extender ADR4400, 0.4 parts by weight of antioxidant 1024, and 0.35 parts by weight of antioxidant T501. 0.375 parts tungsten disulfide, 0.3 parts carbon nanotubes, 1.325 parts nano-silica HB-630, 0.625 parts zinc stearate, 0.625 parts barium stearate, 0.25 parts coupling agent BYKC8003, 0.375 parts maleic anhydride, 0.375 parts silane coupling agent A-172, 0.375 parts anti-hydrolysis agent BTWR-500, 0.375 parts anti-hydrolysis agent 936, 0.45 parts rhamnolipid, 0.3 parts benzyltriethylammonium chloride, 2.5 parts ammonium polyphosphate, 2.5 parts diphenyl toluene phosphate, and 5 parts color masterbatch were physically mixed, melted and cooled to granulate using a twin-screw extruder. The barrel temperature was set to 155-185℃, and a ring blower with an air supply temperature of 50-60℃ was used to obtain the outer layer granules.

[0279] Step 2: Weigh out 15 parts of P3HB4HB (4HB molar content 15%), 12 parts of seaweed fiber, 8 parts of PBS, 0.3 parts of chain extender 6901, 0.575 parts of chain extender ADR4400, 0.4 parts of antioxidant 1024, 0.35 parts of antioxidant T501, 1.375 parts of hollow glass microspheres, 0.375 parts of tungsten disulfide, 0.25 parts of nano titanium dioxide, 0.3 parts of calcium stearate, 0.45 parts of methyl mercaptoacetate, 0.2 parts of coupling agent BYKC8003, 0.275 parts of maleic anhydride, 0.275 parts of silane coupling agent A-172, 0.25 parts of anti-hydrolysis agent BTWR-500, and 0.25 parts of anti-hydrolysis agent 936. 0.3 parts rhamnolipin, 0.2 parts benzyltriethylammonium chloride, 2 parts ammonium polyphosphate, 2 parts diphenyl toluene phosphate, and 4 parts color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder, with the barrel temperature set at 155-200℃ and a ring blower used with an air supply temperature of 30-55℃ to obtain the inner layer granules.

[0280] Step 3: After vacuum drying the outer and inner granules at 70-100℃ for 2-3 hours, inject them separately into an extrusion device equipped with a heating device for melting and extrusion through a screw, combined with a core or island structure (see...). Figure 1 The composite spinneret separately spins out the skin / sea component and core / island component to form composite PHA pre-oriented yarn. The spinning temperature is set to 125-175℃, the pressure inside the melt metering pump is controlled at 10-15MPa, and the spinning speed is 80-160m / min to obtain composite PHA pre-oriented yarn.

[0281] Step 4: Cool the composite PHA pre-oriented yarn through a vertical 1-2m long ring-blowing channel, with an air supply temperature of 30-55℃;

[0282] Step 5: Apply oil to the composite PHA pre-oriented yarn obtained from step 4 by passing it through an oil roller;

[0283] Step 6: The composite PHA pre-oriented yarn obtained from oiling in Step 5 is fed into a hot roller and winding device for stretching and winding. The stretching temperature is controlled at 85-120℃, the stretching and winding speed is 200-640m / min, and the stretching ratio is 2.5-4. The resulting finished yarn is wound on a bobbin.

[0284] Step 7: The full rolls obtained in Step 6 are inspected, graded, and packaged to obtain composite PHA hair strands;

[0285] The composite PHA wig fibers are processed through a three-stage machine, post-processing, styling, re-moistening, and packaging. For curly hair, a steam oven is used for styling, with a temperature of 70-105℃ and a styling time of 25-60 minutes. For straight hair, a steam oven is used for styling, with a temperature of 80-118℃ and a styling time of 30-65 minutes, thus producing a wig with PHA as the base material.

[0286] Example 4

[0287] All raw materials are vacuum dried at 70-100℃ for 8-10 hours to control the moisture content to below 0.5%;

[0288] Step 1: Weigh out the following components by weight: 62.5 parts P3HB4HB (4HB molar content 8%), 0.625 parts chain extender X-U993, 0.5 parts chain extender ADR4400, 0.5 parts antioxidant 1010, 0.25 parts antioxidant 1076, 0.25 parts tungsten disulfide, 0.5 parts titanium boride, and 1.25 parts... 0.5 parts of nano-silica HB-630, 0.75 parts of calcium stearate, 0.5 parts of zinc stearate, 0.5 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, 0.25 parts of silane coupling agent KH570, 0.25 parts of anti-hydrolysis agent HD900A, 0.5 parts of anti-hydrolysis agent BTWR-500, 0.375 parts of polyethylene glycol-6000, 0.375 parts of rhamnolipid, 2 parts of ammonium polyphosphate, 3 parts of triphenyl phosphate, and 5 parts of color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder. The barrel temperature is set to 155-185℃, and a ring blower is used with an air supply temperature of 50-60℃ to obtain the outer layer granules.

[0289] Step 2: Weigh out 15 parts of P3HB4HB (4HB molar content 10%), 10 parts of PBA, 10 parts of PBT, 0.5 parts of chain extender X-U993, 0.375 parts of chain extender ADR4400, 0.5 parts of antioxidant 1010, 0.25 parts of antioxidant 1076, 1.25 parts of hollow glass microspheres, 0.75 parts of boron nitride, 0.5 parts of calcium stearate, 0.25 parts of zinc stearate, 0.25 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, 0.25 parts of silane coupling agent KH570, 0.25 parts of anti-hydrolysis agent HD900A, 0.25 parts of anti-hydrolysis agent BTWR-500, 0.25 parts of polyethylene glycol-6000, and 0.25 parts of other ingredients. 1 part rhamnolipin, 1.5 parts ammonium polyphosphate, 2.5 parts triphenyl phosphate, and 4 parts color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder, with the barrel temperature set at 155-200℃ and a ring blower used with an air supply temperature of 30-55℃ to obtain the inner layer granules.

[0290] Step 3: After vacuum drying the outer and inner granules at 70-100℃ for 2-3 hours, inject them separately into an extrusion device equipped with a heating device for melting and extrusion through a screw, combined with a core or island structure (see...). Figure 1 The composite spinneret separately spins out the skin / sea component and core / island component to form composite PHA pre-oriented yarn. The spinning temperature is set to 125-175℃, the pressure inside the melt metering pump is controlled at 10-15MPa, and the spinning speed is 80-160m / min to obtain composite PHA pre-oriented yarn.

[0291] Step 4: Cool the composite PHA pre-oriented yarn through a vertical 1-2m long ring-blowing channel, with an air supply temperature of 30-55℃;

[0292] Step 5: Apply oil to the composite PHA pre-oriented yarn obtained from step 4 by passing it through an oil roller;

[0293] Step 6: The composite PHA pre-oriented yarn obtained from oiling in Step 5 is fed into a hot roller and winding device for stretching and winding. The stretching temperature is controlled at 85-120℃, the stretching and winding speed is 200-640m / min, and the stretching ratio is 2.5-4. The resulting finished yarn is wound on a bobbin.

[0294] Step 7: The full rolls obtained in Step 6 are inspected, graded, and packaged to obtain composite PHA hair strands;

[0295] The composite PHA wig fibers are processed through a three-stage machine, post-processing, styling, re-moistening, and packaging. For curly hair, a steam oven is used for styling, with a temperature of 70-105℃ and a styling time of 25-60 minutes. For straight hair, a steam oven is used for styling, with a temperature of 80-118℃ and a styling time of 30-65 minutes, thus producing a wig with PHA as the base material.

[0296] Example 5

[0297] All raw materials are vacuum dried at 70-100℃ for 8-10 hours to control the moisture content to below 0.5%;

[0298] Step 1: Weigh out the following components by weight: 62.5 parts P3HB4HB (4HB molar content 8%), 0.625 parts chain extender X-U993, 0.5 parts chain extender ADR4400, 0.5 parts antioxidant 1010, 0.25 parts antioxidant 1076, 0.25 parts tungsten disulfide, 0.5 parts titanium boride, and 1.25 parts... 0.5 parts of nano-silica HB-630, 0.75 parts of calcium stearate, 0.5 parts of zinc stearate, 0.5 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, 0.25 parts of silane coupling agent KH570, 0.25 parts of anti-hydrolysis agent HD900A, 0.5 parts of anti-hydrolysis agent BTWR-500, 0.375 parts of polyethylene glycol-6000, 0.375 parts of rhamnolipid, 2 parts of ammonium polyphosphate, 3 parts of triphenyl phosphate, and 5 parts of color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder. The barrel temperature is set to 155-185℃, and a ring blower is used with an air supply temperature of 50-60℃ to obtain the outer layer granules.

[0299] Step 2: Weigh out 10.5 parts P3HB4HB (4HB molar content 20%), 15 parts PLA, 9.5 parts regenerated cellulose, 0.5 parts chain extender X-U993, 0.375 parts chain extender ADR4400, 0.5 parts antioxidant 1010, 0.25 parts antioxidant 1076, 1.25 parts hollow glass microspheres, 0.75 parts boron nitride, 0.5 parts calcium stearate, 0.25 parts zinc stearate, 0.25 parts titanate coupling agent AT1618, and 0.25 parts... Maleic anhydride, 0.25 parts silane coupling agent KH570, 0.25 parts anti-hydrolysis agent HD900A, 0.25 parts anti-hydrolysis agent BTWR-500, 0.25 parts polyethylene glycol-6000, 0.25 parts rhamnolipid, 1.5 parts ammonium polyphosphate, 2.5 parts triphenyl phosphate, and 4 parts color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder. The barrel temperature is set to 155-200℃, and a ring blower is used with an air supply temperature of 25-60℃ to obtain the inner layer granules.

[0300] Step 3: After vacuum drying the outer and inner granules at 70-100℃ for 2-3 hours, inject them separately into an extrusion device equipped with a heating device for melting and extrusion through a screw, combined with a core or island structure (see...). Figure 1 The composite spinneret separately spins out the skin / sea component and core / island component to form composite PHA pre-oriented yarn. The spinning temperature is set to 125-175℃, the pressure inside the melt metering pump is controlled at 10-15MPa, and the spinning speed is 80-160m / min to obtain composite PHA pre-oriented yarn.

[0301] Step 4: Cool the composite PHA pre-oriented yarn through a vertical 1-2m long ring-blowing channel, with an air supply temperature of 30-55℃;

[0302] Step 5: Apply oil to the composite PHA pre-oriented yarn obtained from step 4 by passing it through an oil roller;

[0303] Step 6: The composite PHA pre-oriented yarn obtained from oiling in Step 5 is fed into a hot roller and winding device for stretching and winding. The stretching temperature is controlled at 85-120℃, the stretching and winding speed is 200-640m / min, and the stretching ratio is 2.5-4. The resulting finished yarn is wound on a bobbin.

[0304] Step 7: The full rolls obtained in Step 6 are inspected, graded, and packaged to obtain composite PHA hair strands;

[0305] The composite PHA wig fibers are processed through a three-stage machine, post-processing, styling, re-moistening, and packaging. For curly hair, a steam oven is used for styling, with a temperature of 70-105℃ and a styling time of 25-60 minutes. For straight hair, a steam oven is used for styling, with a temperature of 80-118℃ and a styling time of 30-65 minutes, thus producing a wig with PHA as the base material.

[0306] Compare with Example 1

[0307] A certain brand makes wigs from real human hair (see...) Figure 2 ).

[0308] Compare with Example 2

[0309] A certain brand makes wigs using protein fibers as the base material (see...) Figure 3 ).

[0310] Compare with Example 3

[0311] A certain brand makes wigs using PAN as the base material (see...) Figure 4 ).

[0312] Comparative Example 4 (excluding P3HB4HB compared to Example 1)

[0313] All raw materials are vacuum dried at 70-100℃ for 8-10 hours to control the moisture content to below 0.5%;

[0314] Step 1: Weigh out the following components by weight: 27.5 parts PBAT, 35 parts PLA, 0.625 parts chain extender X-U993, 0.5 parts chain extender ADR4400, 0.5 parts antioxidant 1010, 0.25 parts antioxidant 1076, 0.25 parts tungsten disulfide, 0.5 parts titanium boride, 1.25 parts nano silica HB-630, 0.5 parts calcium stearate, 0.75 parts zinc stearate, 0.5 parts titanate coupling agent AT1618, and 0.25 parts maleic anhydride. 0.25 parts of silane coupling agent KH570, 0.25 parts of anti-hydrolysis agent HD900A, 0.5 parts of anti-hydrolysis agent BTWR-500, 0.375 parts of polyethylene glycol-6000, 0.375 parts of rhamnolipid, 2 parts of ammonium polyphosphate, 3 parts of triphenyl phosphate, and 5 parts of color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder. The barrel temperature is set to 150-190℃, and a ring blower is used with an air supply temperature of 50-60℃ to obtain the outer layer granules.

[0315] Step 2: Weigh out 24 parts PLA, 11 parts PBAT, 0.5 parts chain extender X-U993, 0.375 parts chain extender ADR4400, 0.5 parts antioxidant 1010, 0.25 parts antioxidant 1076, 1.25 parts hollow glass microspheres, 0.75 parts boron nitride, 0.5 parts calcium stearate, 0.25 parts zinc stearate, 0.25 parts titanate coupling agent AT1618, 0.25 parts maleic anhydride, 0.25 parts silane coupling agent KH570, 0.25 parts anti-hydrolysis agent HD900A, 0.25 parts anti-hydrolysis agent BTWR-500, 0.25 parts polyethylene glycol-6000, 0.25 parts rhamnolipid, and 1.5 parts ammonium polyphosphate. 2.5 parts of triphenyl phosphate and 4 parts of color masterbatch are physically mixed, melted and cooled into granules through a twin-screw extruder, with the barrel temperature set at 155-200℃ and a ring blower used with an air supply temperature of 30-55℃ to obtain inner layer granules;

[0316] Step 3: After vacuum drying the outer and inner granules at 70-100℃ for 2-3 hours, they are injected into an extrusion device equipped with a heating device for melting. The granules are then melt-extruded by a screw and spun out into the sheath / sea component and core / island component of the composite pre-oriented yarn using a composite spinneret with a sheath / core or island structure. The spinning temperature is set to 125-175℃, the pressure in the melt metering pump is controlled at 10-15MPa, and the spinning speed is 80-160m / min to obtain the composite pre-oriented yarn.

[0317] Step 4: Cool the composite pre-oriented yarn through a vertical 1-2m long ring-shaped air blowing channel, with an air supply temperature of 30-55℃;

[0318] Step 5: Apply oil to the composite pre-oriented yarn obtained from step 4 by passing it through an oil roller;

[0319] Step 6: The composite pre-oriented yarn obtained from oiling in Step 5 is fed into a hot roller and winding device for stretching and winding. The stretching temperature is controlled at 85-120℃, the stretching and winding speed is 200-640m / min, and the stretching ratio is 2.5-4. The resulting finished yarn is wound on a bobbin.

[0320] Step 7: The full rolls of hair obtained in Step 6 are inspected, graded, and packaged to obtain composite hair strands;

[0321] The composite hair fibers are processed through a three-stage machine, post-processing, styling, re-moistening, and packaging. For curly hair, a steam oven is used for styling at 70-105℃ for 25-60 minutes; for straight hair, a steam oven is used at 80-118℃ for 30-65 minutes, resulting in the wig (see [link to product description]). Figure 5 ).

[0322] Comparative Example 5 (compared to Example 1, its hair strands are not a skin-core or island-type structure)

[0323] All raw materials are vacuum dried at 70-100℃ for 8-10 hours to control the moisture content to below 0.5%;

[0324] Step 1: Weigh out the following components by weight: 62.5 parts P3HB4HB (4HB molar content 8%), 16 parts P3HB4HB (4HB molar content 15%), 12 parts PLA, 7 parts PBAT, 1.125 parts chain extender X-U993, 0.875 parts chain extender ADR4400, 1 part antioxidant 1010, 0.5 parts antioxidant 1076, 1.25 parts hollow glass microspheres, 0.75 parts boron nitride, 0.25 parts tungsten disulfide, 0.5 parts titanium boride, 1.25 parts nano silica HB-630, 1 part calcium stearate, 1 part zinc stearate, 0.75 parts titanate coupling agent AT1618, and 0.5 parts other components. 0.5 parts maleic anhydride, 0.5 parts silane coupling agent KH570, 0.5 parts anti-hydrolysis agent HD900A, 0.75 parts anti-hydrolysis agent BTWR-500, 0.625 parts polyethylene glycol-6000, 0.625 parts rhamnolipid, 3.5 parts ammonium polyphosphate, 5.5 parts triphenyl phosphate, and 9 parts color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder. The barrel temperature is set to 155-200℃, and a ring blower is used with an air supply temperature of 30-55℃ to obtain granules.

[0325] Step 2: After the granules are vacuum dried at 70-100℃ for 2-3 hours, they are injected into an extrusion device with a heating device for melting and extrusion by screw. The spinning temperature is set to 125-175℃, the pressure in the melt metering pump is controlled at 10-15MPa, and the spinning speed is 80-160m / min to obtain composite PHA pre-oriented yarn.

[0326] Step 3: Cool the composite PHA pre-oriented yarn through a vertical 1-2m long ring-blowing channel, with an air supply temperature of 30-55℃;

[0327] Step 4: Apply oil to the composite PHA pre-oriented yarn obtained from step 3 by passing it through an oil roller;

[0328] Step 5: The composite PHA pre-oriented yarn obtained from oiling in Step 4 is fed into a hot roller and winding device for stretching and winding. The stretching temperature is controlled at 85-120℃, the stretching and winding speed is 200-640m / min, and the stretching ratio is 2.5-4. The resulting finished yarn is wound on a bobbin.

[0329] Step Six: The full rolls obtained in Step Five are inspected, graded, and packaged to obtain composite PHA hair strands;

[0330] The composite PHA wig fibers are processed through a three-stage machine, post-processing, styling, re-moistening, and packaging. For curly hair, a steam oven is used for styling, with a temperature of 70-105℃ and a styling time of 25-60 minutes. For straight hair, a steam oven is used for styling, with a temperature of 80-118℃ and a styling time of 30-65 minutes, thus producing a wig with PHA as the base material.

[0331] Comparative Example 6 (different setting time compared to Example 1)

[0332] All raw materials are vacuum dried at 70-100℃ for 8-10 hours to control the moisture content to below 0.5%;

[0333] Step 1: Weigh out the following components by weight: 62.5 parts P3HB4HB (4HB molar content 8%), 0.625 parts chain extender X-U993, 0.5 parts chain extender ADR4400, 0.5 parts antioxidant 1010, 0.25 parts antioxidant 1076, 0.25 parts tungsten disulfide, 0.5 parts titanium boride, and 1.25 parts... 0.5 parts of nano-silica HB-630, 0.75 parts of calcium stearate, 0.5 parts of zinc stearate, 0.5 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, 0.25 parts of silane coupling agent KH570, 0.25 parts of anti-hydrolysis agent HD900A, 0.5 parts of anti-hydrolysis agent BTWR-500, 0.375 parts of polyethylene glycol-6000, 0.375 parts of rhamnolipid, 2 parts of ammonium polyphosphate, 3 parts of triphenyl phosphate, and 5 parts of color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder. The barrel temperature is set to 155-185℃, and a ring blower is used with an air supply temperature of 50-60℃ to obtain the outer layer granules.

[0334] Step 2: Weigh out 16 parts of P3HB4HB (4HB molar content 15%), 12 parts of PLA, 7 parts of PBAT, 0.5 parts of chain extender X-U993, 0.375 parts of chain extender ADR4400, 0.5 parts of antioxidant 1010, 0.25 parts of antioxidant 1076, 1.25 parts of hollow glass microspheres, 0.75 parts of boron nitride, 0.5 parts of calcium stearate, 0.25 parts of zinc stearate, 0.25 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, 0.25 parts of silane coupling agent KH570, 0.25 parts of anti-hydrolysis agent HD900A, 0.25 parts of anti-hydrolysis agent BTWR-500, 0.25 parts of polyethylene glycol-6000, and 0.25 parts of other ingredients. 1 part rhamnolipin, 1.5 parts ammonium polyphosphate, 2.5 parts triphenyl phosphate, and 4 parts color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder, with the barrel temperature set at 155-200℃ and a ring blower used with an air supply temperature of 30-55℃ to obtain the inner layer granules.

[0335] Step 3: After vacuum drying the outer and inner granules at 70-100℃ for 2-3 hours, inject them separately into an extrusion device equipped with a heating device for melting and extrusion through a screw, combined with a core or island structure (see...). Figure 1 The composite spinneret separately spins out the skin / sea component and core / island component to form composite PHA pre-oriented yarn. The spinning temperature is set to 125-175℃, the pressure inside the melt metering pump is controlled at 10-15MPa, and the spinning speed is 80-160m / min to obtain composite PHA pre-oriented yarn.

[0336] Step 4: Cool the composite PHA pre-oriented yarn through a vertical 1-2m long ring-blowing channel, with an air supply temperature of 30-55℃;

[0337] Step 5: Apply oil to the composite PHA pre-oriented yarn obtained from step 4 by passing it through an oil roller;

[0338] Step 6: The composite PHA pre-oriented yarn obtained from oiling in Step 5 is fed into a hot roller and winding device for stretching and winding. The stretching temperature is controlled at 85-120℃, the stretching and winding speed is 200-640m / min, and the stretching ratio is 2.5-4. The resulting finished yarn is wound on a bobbin.

[0339] Step 7: The full rolls obtained in Step 6 are inspected, graded, and packaged to obtain composite PHA hair strands;

[0340] The composite PHA wig fibers are processed through a three-stage machine, post-processing, styling, re-moistening, and packaging. For curly hair, a steam oven is used for styling, with a temperature of 70-105℃ and a styling time of 1-5 minutes. For straight hair, a steam oven is used for styling, with a temperature of 80-118℃ and a styling time of 90-120 minutes, thus producing a wig with PHA as the base material.

[0341] Comparative Example 7 (different setting temperature compared to Example 1)

[0342] All raw materials are vacuum dried at 70-100℃ for 8-10 hours to control the moisture content to below 0.5%;

[0343] Step 1: Weigh out the following components by weight: 62.5 parts P3HB4HB (4HB molar content 8%), 0.625 parts chain extender X-U993, 0.5 parts chain extender ADR4400, 0.5 parts antioxidant 1010, 0.25 parts antioxidant 1076, 0.25 parts tungsten disulfide, 0.5 parts titanium boride, and 1.25 parts... 0.5 parts of nano-silica HB-630, 0.75 parts of calcium stearate, 0.5 parts of zinc stearate, 0.5 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, 0.25 parts of silane coupling agent KH570, 0.25 parts of anti-hydrolysis agent HD900A, 0.5 parts of anti-hydrolysis agent BTWR-500, 0.375 parts of polyethylene glycol-6000, 0.375 parts of rhamnolipid, 2 parts of ammonium polyphosphate, 3 parts of triphenyl phosphate, and 5 parts of color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder. The barrel temperature is set to 155-185℃, and a ring blower is used with an air supply temperature of 50-60℃ to obtain the outer layer granules.

[0344] Step 2: Weigh out 16 parts of P3HB4HB (4HB molar content 15%), 12 parts of PLA, 7 parts of PBAT, 0.5 parts of chain extender X-U993, 0.375 parts of chain extender ADR4400, 0.5 parts of antioxidant 1010, 0.25 parts of antioxidant 1076, 1.25 parts of hollow glass microspheres, 0.75 parts of boron nitride, 0.5 parts of calcium stearate, 0.25 parts of zinc stearate, 0.25 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, 0.25 parts of silane coupling agent KH570, 0.25 parts of anti-hydrolysis agent HD900A, 0.25 parts of anti-hydrolysis agent BTWR-500, 0.25 parts of polyethylene glycol-6000, and 0.25 parts of other ingredients. 1 part rhamnolipin, 1.5 parts ammonium polyphosphate, 2.5 parts triphenyl phosphate, and 4 parts color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder, with the barrel temperature set at 155-200℃ and a ring blower used with an air supply temperature of 30-55℃ to obtain the inner layer granules.

[0345] Step 3: After vacuum drying the outer and inner granules at 70-100℃ for 2-3 hours, inject them separately into an extrusion device equipped with a heating device for melting and extrusion through a screw, combined with a core or island structure (see...). Figure 1 The composite spinneret separately spins out the skin / sea component and core / island component to form composite PHA pre-oriented yarn. The spinning temperature is set to 125-175℃, the pressure inside the melt metering pump is controlled at 10-15MPa, and the spinning speed is 80-160m / min to obtain composite PHA pre-oriented yarn.

[0346] Step 4: Cool the composite PHA pre-oriented yarn through a vertical 1-2m long ring-blowing channel, with an air supply temperature of 30-55℃;

[0347] Step 5: Apply oil to the composite PHA pre-oriented yarn obtained from step 4 by passing it through an oil roller;

[0348] Step 6: The composite PHA pre-oriented yarn obtained from oiling in Step 5 is fed into a hot roller and winding device for stretching and winding. The stretching temperature is controlled at 85-120℃, the stretching and winding speed is 200-640m / min, and the stretching ratio is 2.5-4. The resulting finished yarn is wound on a bobbin.

[0349] Step 7: The full rolls obtained in Step 6 are inspected, graded, and packaged to obtain composite PHA hair strands;

[0350] The composite PHA wig fibers are processed through a three-stage machine, post-processing, styling, re-moistening, and packaging. For curly hair, a steam oven is used for styling, with a temperature of 120-140℃ and a styling time of 25-60 minutes. For straight hair, a steam oven is used for styling, with a temperature of 125-148℃ and a styling time of 30-65 minutes, thus producing a wig with PHA as the base material.

[0351] Comparative Example 8 (compared to Example 1, the inner layer substrate does not contain P3HB4HB)

[0352] All raw materials are vacuum dried at 70-100℃ for 8-10 hours to control the moisture content to below 0.5%;

[0353] Step 1: Weigh out the following components by weight: 62.5 parts P3HB4HB (4HB molar content 8%), 0.625 parts chain extender X-U993, 0.5 parts chain extender ADR4400, 0.5 parts antioxidant 1010, 0.25 parts antioxidant 1076, 0.25 parts tungsten disulfide, 0.5 parts titanium boride, and 1.25 parts... 0.5 parts of nano-silica HB-630, 0.75 parts of calcium stearate, 0.5 parts of zinc stearate, 0.5 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, 0.25 parts of silane coupling agent KH570, 0.25 parts of anti-hydrolysis agent HD900A, 0.5 parts of anti-hydrolysis agent BTWR-500, 0.375 parts of polyethylene glycol-6000, 0.375 parts of rhamnolipid, 2 parts of ammonium polyphosphate, 3 parts of triphenyl phosphate, and 5 parts of color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder. The barrel temperature is set to 155-185℃, and a ring blower is used with an air supply temperature of 50-60℃ to obtain the outer layer granules.

[0354] Step 2: Weigh out 22 parts PLA, 13 parts PBAT, 0.5 parts chain extender X-U993, 0.375 parts chain extender ADR4400, 0.5 parts antioxidant 1010, 0.25 parts antioxidant 1076, 1.25 parts hollow glass microspheres, 0.75 parts boron nitride, 0.5 parts calcium stearate, 0.25 parts zinc stearate, 0.25 parts titanate coupling agent AT1618, 0.25 parts maleic anhydride, 0.25 parts silane coupling agent KH570, 0.25 parts anti-hydrolysis agent HD900A, 0.25 parts anti-hydrolysis agent BTWR-500, 0.25 parts polyethylene glycol-6000, 0.25 parts rhamnolipid, and 1.5 parts ammonium polyphosphate. 2.5 parts of triphenyl phosphate and 4 parts of color masterbatch are physically mixed, melted and cooled into granules through a twin-screw extruder, with the barrel temperature set at 155-200℃ and a ring blower used with an air supply temperature of 30-55℃ to obtain inner layer granules;

[0355] Step 3: After vacuum drying the outer and inner granules at 70-100℃ for 2-3 hours, inject them separately into an extrusion device equipped with a heating device for melting and extrusion through a screw, combined with a core or island structure (see...). Figure 1 The composite spinneret separately spins out the skin / sea component and core / island component to form composite PHA pre-oriented yarn. The spinning temperature is set to 125-175℃, the pressure inside the melt metering pump is controlled at 10-15MPa, and the spinning speed is 80-160m / min to obtain composite PHA pre-oriented yarn.

[0356] Step 4: Cool the composite PHA pre-oriented yarn through a vertical 1-2m long ring-blowing channel, with an air supply temperature of 30-55℃;

[0357] Step 5: Apply oil to the composite PHA pre-oriented yarn obtained from step 4 by passing it through an oil roller;

[0358] Step 6: The composite PHA pre-oriented yarn obtained from oiling in Step 5 is fed into a hot roller and winding device for stretching and winding. The stretching temperature is controlled at 85-120℃, the stretching and winding speed is 200-640m / min, and the stretching ratio is 2.5-4. The resulting finished yarn is wound on a bobbin.

[0359] Step 7: The full rolls obtained in Step 6 are inspected, graded, and packaged to obtain composite PHA hair strands;

[0360] The composite PHA wig fibers are processed through a three-stage machine, post-processing, styling, re-moistening, and packaging. For curly hair, a steam oven is used for styling, with a temperature of 70-105℃ and a styling time of 25-60 minutes. For straight hair, a steam oven is used for styling, with a temperature of 80-118℃ and a styling time of 30-65 minutes, thus producing a wig with PHA as the base material.

[0361] Comparative Example 9 (compared to Example 1, the outer substrate is not pure P3HB4HB, but partially replaced with PBS)

[0362] All raw materials are vacuum dried at 70-100℃ for 8-10 hours to control the moisture content to below 0.5%;

[0363] Step 1: Weigh out the following components by weight: 27.5 parts P3HB4HB (4HB molar content 8%), 35 parts PBS, 0.625 parts chain extender X-U993, 0.5 parts chain extender ADR4400, 0.5 parts antioxidant 1010, 0.25 parts antioxidant 1076, 0.25 parts tungsten disulfide, 0.5 parts titanium boride, 1.25 parts nano silica HB-630, 0.5 parts calcium stearate, 0.75 parts zinc stearate, 0.5 parts titanate coupling agent AT1618, 0.25 parts maleic anhydride, 0.25 parts silane coupling agent KH570, 0.25 parts anti-hydrolysis agent HD900A, and 0.5 parts anti-hydrolysis agent BTWR-500. 0.375 parts of polyethylene glycol-6000, 0.375 parts of rhamnolipin, 2 parts of ammonium polyphosphate, 3 parts of triphenyl phosphate, and 5 parts of color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder. The barrel temperature is set to 155-185℃, and a ring blower is used with an air supply temperature of 50-60℃ to obtain the outer layer granules.

[0364] Step 2: Weigh out 16 parts of P3HB4HB (4HB molar content 15%), 12 parts of PLA, 7 parts of PBAT, 0.5 parts of chain extender X-U993, 0.375 parts of chain extender ADR4400, 0.5 parts of antioxidant 1010, 0.25 parts of antioxidant 1076, 1.25 parts of hollow glass microspheres, 0.75 parts of boron nitride, 0.5 parts of calcium stearate, 0.25 parts of zinc stearate, 0.25 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, 0.25 parts of silane coupling agent KH570, 0.25 parts of anti-hydrolysis agent HD900A, 0.25 parts of anti-hydrolysis agent BTWR-500, 0.25 parts of polyethylene glycol-6000, and 0.25 parts of other ingredients. 1 part rhamnolipin, 1.5 parts ammonium polyphosphate, 2.5 parts triphenyl phosphate, and 4 parts color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder, with the barrel temperature set at 155-200℃ and a ring blower used with an air supply temperature of 30-55℃ to obtain the inner layer granules.

[0365] Step 3: After vacuum drying the outer and inner granules at 70-100℃ for 2-3 hours, inject them separately into an extrusion device equipped with a heating device for melting and extrusion through a screw, combined with a core or island structure (see...). Figure 1 The composite spinneret separately spins out the skin / sea component and core / island component to form composite PHA pre-oriented yarn. The spinning temperature is set to 125-175℃, the pressure inside the melt metering pump is controlled at 10-15MPa, and the spinning speed is 80-160m / min to obtain composite PHA pre-oriented yarn.

[0366] Step 4: Cool the composite PHA pre-oriented yarn through a vertical 1-2m long ring-blowing channel, with an air supply temperature of 30-55℃;

[0367] Step 5: Apply oil to the composite PHA pre-oriented yarn obtained from step 4 by passing it through an oil roller;

[0368] Step 6: The composite PHA pre-oriented yarn obtained from oiling in Step 5 is fed into a hot roller and winding device for stretching and winding. The stretching temperature is controlled at 85-120℃, the stretching and winding speed is 200-640m / min, and the stretching ratio is 2.5-4. The resulting finished yarn is wound on a bobbin.

[0369] Step 7: The full rolls obtained in Step 6 are inspected, graded, and packaged to obtain composite PHA hair strands;

[0370] The composite PHA wig fibers are processed through a three-stage machine, post-processing, styling, re-moistening, and packaging. For curly hair, a steam oven is used for styling, with a temperature of 70-105℃ and a styling time of 25-60 minutes. For straight hair, a steam oven is used for styling, with a temperature of 80-118℃ and a styling time of 30-65 minutes, thus producing a wig with PHA as the base material.

[0371] Comparative Example 10 (no coupling agent was added compared to Example 1)

[0372] All raw materials are vacuum dried at 70-100℃ for 8-10 hours to control the moisture content to below 0.5%;

[0373] Step 1: Weigh out the following components by weight: 62.5 parts P3HB4HB (4HB molar content 8%), 0.625 parts chain extender X-U993, 0.5 parts chain extender ADR4400, 0.5 parts antioxidant 1010, 0.25 parts antioxidant 1076, 0.25 parts tungsten disulfide, 0.5 parts titanium boride, and 1.25 parts... 0.5 parts of nano-silica HB-630, 0.75 parts of calcium stearate, 0.25 parts of anti-hydrolysis agent HD900A, 0.5 parts of anti-hydrolysis agent BTWR-500, 0.375 parts of polyethylene glycol-6000, 0.375 parts of rhamnolipid, 2 parts of ammonium polyphosphate, 3 parts of triphenyl phosphate, and 5 parts of color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder. The barrel temperature is set to 155-185℃, and a ring blower is used with an air supply temperature of 50-60℃ to obtain the outer layer granules.

[0374] Step Two: Weigh out 16 parts of P3HB4HB (4HB molar content 15%), 12 parts of PLA, 7 parts of PBAT, 0.5 parts of chain extender X-U993, 0.375 parts of chain extender ADR4400, 0.5 parts of antioxidant 1010, 0.25 parts of antioxidant 1076, 1.25 parts of hollow glass microspheres, 0.75 parts of boron nitride, 0.5 parts of calcium stearate, 0.25 parts of zinc stearate, 0.25 parts of anti-hydrolysis agent HD900A, 0.25 parts of anti-hydrolysis agent BTWR-500, and 0.25 parts of other ingredients. 0.25 parts of polyethylene glycol-6000, 1.5 parts of rhamnolipin, 2.5 parts of ammonium polyphosphate, 2.5 parts of triphenyl phosphate, and 4 parts of color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder. The barrel temperature is set to 155-200℃, and a ring blower is used with an air supply temperature of 30-55℃ to obtain the inner layer granules.

[0375] Step 3: After vacuum drying the outer and inner granules at 70-100℃ for 2-3 hours, inject them separately into an extrusion device equipped with a heating device for melting and extrusion through a screw, combined with a core or island structure (see...). Figure 1The composite spinneret separately spins out the skin / sea component and core / island component to form composite PHA pre-oriented yarn. The spinning temperature is set to 125-175℃, the pressure inside the melt metering pump is controlled at 10-15MPa, and the spinning speed is 80-160m / min to obtain composite PHA pre-oriented yarn.

[0376] Step 4: Cool the composite PHA pre-oriented yarn through a vertical 1-2m long ring-blowing channel, with an air supply temperature of 30-55℃;

[0377] Step 5: Apply oil to the composite PHA pre-oriented yarn obtained from step 4 by passing it through an oil roller;

[0378] Step 6: The composite PHA pre-oriented yarn obtained from oiling in Step 5 is fed into a hot roller and winding device for stretching and winding. The stretching temperature is controlled at 85-120℃, the stretching and winding speed is 200-640m / min, and the stretching ratio is 2.5-4. The resulting finished yarn is wound on a bobbin.

[0379] Step 7: The full rolls obtained in Step 6 are inspected, graded, and packaged to obtain composite PHA hair strands;

[0380] The composite PHA wig fibers are processed through a three-stage machine, post-processing, styling, re-moistening, and packaging. For curly hair, a steam oven is used for styling, with a temperature of 70-105℃ and a styling time of 25-60 minutes. For straight hair, a steam oven is used for styling, with a temperature of 80-118℃ and a styling time of 30-65 minutes, thus producing a wig with PHA as the base material.

[0381] Comparative Example 11 (no surfactant was added compared to Example 1)

[0382] All raw materials are vacuum dried at 70-100℃ for 8-10 hours to control the moisture content to below 0.5%;

[0383] Step 1: Weigh out the following components by weight: 62.5 parts P3HB4HB (4HB molar content 8%), 0.625 parts chain extender X-U993, 0.5 parts chain extender ADR4400, 0.5 parts antioxidant 1010, 0.25 parts antioxidant 1076, 0.25 parts tungsten disulfide, 0.5 parts titanium boride, and 1.25 parts... 0.5 parts of nano-silica HB-630, 0.75 parts of calcium stearate, 0.5 parts of zinc stearate, 0.5 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, 0.25 parts of silane coupling agent KH570, 0.25 parts of anti-hydrolysis agent HD900A, 0.5 parts of anti-hydrolysis agent BTWR-500, 2 parts of ammonium polyphosphate, 3 parts of triphenyl phosphate, and 5 parts of color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder, with the barrel temperature set at 155-185℃ and a ring blower used with an air supply temperature of 50-60℃ to obtain the outer layer granules;

[0384] Step 2: Weigh out 16 parts of P3HB4HB (4HB molar content 15%), 12 parts of PLA, 7 parts of PBAT, and 0.5 parts of chain extender X-U993. 0.375 parts chain extender ADR4400, 0.5 parts antioxidant 1010, 0.25 parts antioxidant 1076, 1.25 parts hollow glass microspheres, 0.75 parts boron nitride, 0.5 parts calcium stearate, 0.25 parts zinc stearate, 0.25 parts titanate coupling agent AT1618, 0.25 parts maleic anhydride, 0.25 parts silane coupling agent KH570, 0.25 parts hydrolysis inhibitor HD900A, 0.25 parts hydrolysis inhibitor BTWR-500, 1.5 parts ammonium polyphosphate, 2.5 parts triphenyl phosphate, and 4 parts color masterbatch are physically mixed, melted and cooled to granulate using a twin-screw extruder. The barrel temperature is set to 155-200℃, and a ring blower with an air supply temperature of 30-55℃ is used to obtain the inner layer granules.

[0385] Step 3: After vacuum drying the outer and inner granules at 70-100℃ for 2-3 hours, inject them separately into an extrusion device equipped with a heating device for melting and extrusion through a screw, combined with a core or island structure (see...). Figure 1 The composite spinneret separately spins out the skin / sea component and core / island component to form composite PHA pre-oriented yarn. The spinning temperature is set to 125-175℃, the pressure inside the melt metering pump is controlled at 10-15MPa, and the spinning speed is 80-160m / min to obtain composite PHA pre-oriented yarn.

[0386] Step 4: Cool the composite PHA pre-oriented yarn through a vertical 1-2m long ring-blowing channel, with an air supply temperature of 30-55℃;

[0387] Step 5: Apply oil to the composite PHA pre-oriented yarn obtained from step 4 by passing it through an oil roller;

[0388] Step 6: The composite PHA pre-oriented yarn obtained from oiling in Step 5 is fed into a hot roller and winding device for stretching and winding. The stretching temperature is controlled at 85-120℃, the stretching and winding speed is 200-640m / min, and the stretching ratio is 2.5-4. The resulting finished yarn is wound on a bobbin.

[0389] Step 7: The full rolls obtained in Step 6 are inspected, graded, and packaged to obtain composite PHA hair strands;

[0390] The composite PHA wig fibers are processed through a three-stage machine, post-processing, styling, re-moistening, and packaging. For curly hair, a steam oven is used for styling, with a temperature of 70-105℃ and a styling time of 25-60 minutes. For straight hair, a steam oven is used for styling, with a temperature of 80-118℃ and a styling time of 30-65 minutes, thus producing a wig with PHA as the base material.

[0391] Comparative Example 12 (compared to Example 1, rhamnolipid was replaced with sodium petroleum sulfonate)

[0392] All raw materials are vacuum dried at 70-100℃ for 8-10 hours to control the moisture content to below 0.5%;

[0393] Step 1: Weigh out the following components by weight: 62.5 parts P3HB4HB (4HB molar content 8%), 0.625 parts chain extender X-U993, 0.5 parts chain extender ADR4400, 0.5 parts antioxidant 1010, 0.25 parts antioxidant 1076, 0.25 parts tungsten disulfide, 0.5 parts titanium boride, and 1.25 parts... 0.5 parts of nano-silica HB-630, 0.75 parts of calcium stearate, 0.5 parts of zinc stearate, 0.5 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, 0.25 parts of silane coupling agent KH570, 0.25 parts of anti-hydrolysis agent HD900A, 0.5 parts of anti-hydrolysis agent BTWR-500, 0.375 parts of polyethylene glycol-6000, 0.375 parts of sodium petroleum sulfonate, 2 parts of ammonium polyphosphate, 3 parts of triphenyl phosphate, and 5 parts of color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder. The barrel temperature is set to 155-185℃, and a ring blower with an air supply temperature of 50-60℃ is used to obtain the outer layer granules.

[0394] Step 2: Weigh out 16 parts of P3HB4HB (4HB molar content 15%), 12 parts of PLA, 7 parts of PBAT, 0.5 parts of chain extender X-U993, 0.375 parts of chain extender ADR4400, 0.5 parts of antioxidant 1010, 0.25 parts of antioxidant 1076, 1.25 parts of hollow glass microspheres, 0.75 parts of boron nitride, 0.5 parts of calcium stearate, 0.25 parts of zinc stearate, 0.25 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, 0.25 parts of silane coupling agent KH570, 0.25 parts of anti-hydrolysis agent HD900A, 0.25 parts of anti-hydrolysis agent BTWR-500, 0.25 parts of polyethylene glycol-6000, and 0.25 parts of other ingredients. 1 part sodium petroleum sulfonate, 1.5 parts ammonium polyphosphate, 2.5 parts triphenyl phosphate, and 4 parts color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder, with the barrel temperature set at 155-200℃ and a ring blower used with an air supply temperature of 30-55℃ to obtain inner layer granules.

[0395] Step 3: After vacuum drying the outer and inner granules at 70-100℃ for 2-3 hours, inject them separately into an extrusion device equipped with a heating device for melting and extrusion through a screw, combined with a core or island structure (see...). Figure 1 The composite spinneret separately spins out the skin / sea component and core / island component to form composite PHA pre-oriented yarn. The spinning temperature is set to 125-175℃, the pressure inside the melt metering pump is controlled at 10-15MPa, and the spinning speed is 80-160m / min to obtain composite PHA pre-oriented yarn.

[0396] Step 4: Cool the composite PHA pre-oriented yarn through a vertical 1-2m long ring-blowing channel, with an air supply temperature of 30-55℃;

[0397] Step 5: Apply oil to the composite PHA pre-oriented yarn obtained from step 4 by passing it through an oil roller;

[0398] Step 6: The composite PHA pre-oriented yarn obtained from oiling in Step 5 is fed into a hot roller and winding device for stretching and winding. The stretching temperature is controlled at 85-120℃, the stretching and winding speed is 200-640m / min, and the stretching ratio is 2.5-4. The resulting finished yarn is wound on a bobbin.

[0399] Step 7: The full rolls obtained in Step 6 are inspected, graded, and packaged to obtain composite PHA hair strands;

[0400] The composite PHA wig fibers are processed through a three-stage machine, post-processing, styling, re-moistening, and packaging. For curly hair, a steam oven is used for styling, with a temperature of 70-105℃ and a styling time of 25-60 minutes. For straight hair, a steam oven is used for styling, with a temperature of 80-118℃ and a styling time of 30-65 minutes, thus producing a wig with PHA as the base material.

[0401] Comparative Example 13 (the flame retardant ratio is different compared to Example 1)

[0402] All raw materials are vacuum dried at 70-100℃ for 8-10 hours to control the moisture content to below 0.5%;

[0403] Step 1: Weigh out the following components by weight: 62.5 parts P3HB4HB (4HB molar content 8%), 0.625 parts chain extender X-U993, 0.5 parts chain extender ADR4400, 0.5 parts antioxidant 1010, 0.25 parts antioxidant 1076, 0.25 parts tungsten disulfide, 0.5 parts titanium boride, and 1.25 parts... 0.5 parts of nano-silica HB-630, 0.75 parts of calcium stearate, 0.5 parts of zinc stearate, 0.5 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, 0.25 parts of silane coupling agent KH570, 0.25 parts of hydrolysis inhibitor HD900A, 0.5 parts of hydrolysis inhibitor BTWR-500, 0.375 parts of polyethylene glycol-6000, 0.375 parts of rhamnolipid, 0.5 parts of ammonium polyphosphate, 4.5 parts of triphenyl phosphate, and 5 parts of color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder. The barrel temperature is set to 155-185℃, and a ring blower is used with an air supply temperature of 50-60℃ to obtain the outer layer granules.

[0404] Step 2: Weigh out 16 parts of P3HB4HB (4HB molar content 15%), 12 parts of PLA, 7 parts of PBAT, 0.5 parts of chain extender X-U993, 0.375 parts of chain extender ADR4400, 0.5 parts of antioxidant 1010, 0.25 parts of antioxidant 1076, 1.25 parts of hollow glass microspheres, 0.75 parts of boron nitride, 0.5 parts of calcium stearate, 0.25 parts of zinc stearate, 0.25 parts of titanate coupling agent AT1618, 0.25 parts of maleic anhydride, 0.25 parts of silane coupling agent KH570, 0.25 parts of anti-hydrolysis agent HD900A, 0.25 parts of anti-hydrolysis agent BTWR-500, 0.25 parts of polyethylene glycol-6000, and 0.25 parts of other ingredients. 0.4 parts rhamnolipin, 3.6 parts ammonium polyphosphate, 3.6 parts triphenyl phosphate, and 4 parts color masterbatch are physically mixed, melted and cooled to granulate through a twin-screw extruder, with the barrel temperature set at 155-200℃ and a ring blower used with an air supply temperature of 30-55℃ to obtain the inner layer granules.

[0405] Step 3: After vacuum drying the outer and inner granules at 70-100℃ for 2-3 hours, inject them separately into an extrusion device equipped with a heating device for melting and extrusion through a screw, combined with a core or island structure (see...). Figure 1 The composite spinneret separately spins out the skin / sea component and core / island component to form composite PHA pre-oriented yarn. The spinning temperature is set to 125-175℃, the pressure inside the melt metering pump is controlled at 10-15MPa, and the spinning speed is 80-160m / min to obtain composite PHA pre-oriented yarn.

[0406] Step 4: Cool the composite PHA pre-oriented yarn through a vertical 1-2m long ring-blowing channel, with an air supply temperature of 30-55℃;

[0407] Step 5: Apply oil to the composite PHA pre-oriented yarn obtained from step 4 by passing it through an oil roller;

[0408] Step 6: The composite PHA pre-oriented yarn obtained from oiling in Step 5 is fed into a hot roller and winding device for stretching and winding. The stretching temperature is controlled at 85-120℃, the stretching and winding speed is 200-640m / min, and the stretching ratio is 2.5-4. The resulting finished yarn is wound on a bobbin.

[0409] Step 7: The full rolls obtained in Step 6 are inspected, graded, and packaged to obtain composite PHA hair strands;

[0410] The composite PHA wig fibers are processed through a three-stage machine, post-processing, styling, re-moistening, and packaging. For curly hair, a steam oven is used for styling, with a temperature of 70-105℃ and a styling time of 25-60 minutes. For straight hair, a steam oven is used for styling, with a temperature of 80-118℃ and a styling time of 30-65 minutes, thus producing a wig with PHA as the base material.

[0411] The test results of each embodiment and control example are shown in Tables 7-8. Except for the curling performance and the marked items, the unmarked items are the straight hair test results.

[0412] Table 7: Test results of Examples 1-5 and Control Examples 1-5

[0413]

[0414]

[0415]

[0416] Table 8: Test results of Example 1 and Control Examples 6-13

[0417]

[0418]

[0419] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0420] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

Claims

1. A wig, characterized in that, The wig described includes an outer layer structure and an inner layer structure; The outer layer structure includes an outer layer substrate and an outer layer auxiliary material. The outer layer substrate includes P3HB4HB, and the outer layer auxiliary material includes one or more of the following: heat stabilizer, chain extender, antioxidant, nucleating agent, coupling agent, anti-hydrolysis agent, flame retardant, surfactant, or color masterbatch. The inner layer structure includes an inner layer substrate and an inner layer auxiliary material, wherein the inner layer substrate is selected from any one of the following groups: A) P3HB4HB, PLA and PBAT, wherein the mass ratio of P3HB4HB, PLA and PBAT is (10-20):(10-15):(5-10); B) P3HB4HB, PPC and soybean protein fiber, wherein the mass ratio of P3HB4HB, PPC and soybean protein fiber is (10-15):(10-20):(5-10). C) P3HB4HB, seaweed fiber and PBS, wherein the mass ratio of P3HB4HB, seaweed fiber and PBS is (10-20):(10-15):(5-10); D) P3HB4HB, PBA and PBT, wherein the mass ratio of P3HB4HB, PBA and PBT is (10-25):(10-20):(10-20); E) P3HB4HB, PLA and regenerated cellulose, wherein the mass ratio of P3HB4HB, PLA and regenerated cellulose is (5-15):(10-25):(5-15); the inner layer auxiliary material includes one or more of the following: heat stabilizer, chain extender, antioxidant, nucleating agent, coupling agent, anti-hydrolysis agent, flame retardant, surfactant or color masterbatch; The outer layer and the inner layer, in terms of mass, have a mass ratio of (35-126):(10-89). The outer layer structure comprises, by weight, 55-70 parts of outer layer substrate and 12-24 parts of outer layer auxiliary material; The inner layer structure comprises, by weight, 30-40 parts inner layer substrate and 10-19 parts inner layer auxiliary material; The molar content of 4HB in the P3HB4HB is between 5% and 20%.

2. The wig according to claim 1, characterized in that, The outer substrate comprises one or more of P3HB and 4HB with different 4HB molar contents.

3. The wig according to claim 1, characterized in that, in, The heat stabilizer is selected from one or more of calcium stearate, zinc stearate, magnesium stearate, barium stearate, methyl mercaptoacetate, and heat stabilizer DP1100. The chain extender is selected from one or more of chain extender X-U993, chain extender LK4468, chain extender ADR4400, and chain extender 6901; The antioxidant is selected from one or more of antioxidant 1010, antioxidant 1024, antioxidant 1076, and antioxidant T501; The nucleating agent is selected from one or more of tungsten disulfide, titanium boride, boron nitride, nano titanium dioxide, nano silica HB-630, hollow glass microspheres, and carbon nanotubes; The coupling agent is selected from one or more of the following: titanate coupling agent AT1618, maleic anhydride, coupling agent BYKC8003, silane coupling agent A-172, silane coupling agent KH550, and silane coupling agent KH570. The anti-hydrolysis agent is selected from one or more of anti-hydrolysis agent 936, anti-hydrolysis agent HD900A, and anti-hydrolysis agent BTWR-500; The flame retardant is selected from one or more of ammonium polyphosphate, triphenyl phosphate, and diphenyl toluene phosphate; The surfactant is selected from one or more of polyethylene glycol, polyvinyl alcohol, rhamnolipid, and quaternary ammonium salt surfactants; The masterbatch is a P3HB4HB base masterbatch with different color systems added as needed.

4. The wig according to claim 3, characterized in that, The polyethylene glycol is one or more of polyethylene glycol-3000, polyethylene glycol-6000, polyethylene glycol-10000, and polyethylene glycol-20000; Polyvinyl alcohol is one or more of polyvinyl alcohol 1799, polyvinyl alcohol 2099, polyvinyl alcohol 2499, and polyvinyl alcohol 2699; The quaternary ammonium salt surfactant is one or more of benzyltriethylammonium chloride, dodecyldimethylammonium chloride, hexadecyltrimethylammonium chloride, and octadecyltrimethylammonium chloride.

5. The wig according to claim 1, characterized in that, The outer layer and the inner layer have a mass ratio of (62.5-81):(35-50).

6. The wig according to claim 1, characterized in that, The wig has a skin-core type or island type structure, wherein the outer layer is a skin or island component, and the inner layer is a core or island component.

7. A method for preparing a wig according to any one of claims 1-6, characterized in that, The preparation method includes melting and granulating the outer and inner layers separately, followed by spinning, cooling, oiling, and stretching and winding.

8. The preparation method according to claim 7, characterized in that, The preparation method includes the following steps: Step 1: Weigh 55-70 parts of outer layer substrate and 12-24 parts of outer layer auxiliary material by mass, mix them, melt and cool them through a twin-screw extruder to granulate. The barrel temperature is set to 130-210℃, and a ring blower is used with an air supply temperature of 18-65℃ to obtain outer layer granules. Step 2: Weigh 30-40 parts of inner layer substrate and 10-19 parts of inner layer auxiliary material by weight, mix them, melt and cool them through a twin-screw extruder to granulate. The barrel temperature is set to 130-210℃, and a ring blower is used with an air supply temperature of 18-65℃ to obtain inner layer granules. Step 3: Vacuum dry the obtained outer and inner granules, and inject them into an extrusion device equipped with a heating device for melting. The granules are melt-extruded by a screw, and with the help of a composite spinneret with a core-shell or island-type structure, the outer granules are extruded as the skin or island component, and the inner granules are extruded as the core / island component, forming a complete composite PHA pre-oriented yarn. The spinning temperature is set to 120-210℃, the pressure in the melt metering pump is controlled at 8-17MPa, and the spinning speed is 80-160m / min. Step 4: Cool the composite PHA pre-oriented yarn through a vertical 1-2m long ring-shaped air blowing channel, where the air supply temperature is 18-65℃; Step 5: Apply oil to the cooled composite PHA pre-oriented yarn from Step 4 using an oil roller; Step 6: Feed the oiled composite PHA pre-oriented yarn from Step 5 into a hot roller and winding device for stretching and winding. Control the stretching temperature to be 70-120℃, the stretching and winding speed to be 200-640m / min, and the stretching ratio to be 2.5-4. The resulting finished yarn is wound onto a bobbin.

9. The preparation method according to claim 8, characterized in that, The preparation method also includes beating and shaping the finished yarn obtained in step six.

10. The preparation method according to claim 9, characterized in that, The styling mentioned refers to either curly hair styling or straight hair styling; wherein, The curvature setting method uses a steam chamber setting at a temperature of 60-118℃ for 15-70 minutes. The direct setting method uses a steam chamber for setting at a temperature of 70-125℃ for 20-75 minutes.

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