Embroidery with PU layer and processing technology thereof

Abstract

The present application belongs to the technical field of textiles, and specifically discloses a kind of embroidery with PU layer and its processing technology.The embroidery with PU layer includes mesh layer and PU layer, and the PU layer, by weight, includes the following raw materials: 60 80 parts of polyether polyols, 50 70 parts of 2,4 toluene diisocyanate, 6 15 parts of vinyl trimethoxy silane, 25 35 parts of modified talc, 13 20 parts of modified glass fiber, 7 13 parts of triacetin and 9 15 parts of graphene.The embroidery with PU layer prepared by the present application has higher mechanical strength, tear resistance and elasticity, and subsequently contributes to embroidery process, so that the insertion of needle and thread or penetration of PU layer, PU layer is also not easy to tear.

Description

Technical Field

[0001] The present application relates to the technical field of textiles, and in particular to an embroidery product with a PU layer and a processing technology thereof. Background Art

[0002] Embroidery is a textile made by hand or machine. It is artistic, ornamental and practical. It can be flat or three-dimensional. It can decorate walls, bedding, clothes and accessories, etc. and has a wide range of uses.

[0003] PU, short for polyurethane, has a good appearance and feel, delicate and soft texture, good wear resistance and high temperature resistance. It is widely used in machinery, automobiles, construction, textiles, sports equipment, furniture and other fields. Among them, PU film is widely used on clothing as a protective layer for patterns due to its good elasticity, breathability and wear resistance, and is deeply loved by people.

[0004] In the prior art, PU film is fixed on the surface of clothing by embroidery, which not only has good ornamental value but also provides protection for the clothing. However, the existing PU film is easily torn due to the insertion or penetration of needle and thread, thereby affecting the subsequent embroidery process. Summary of the Invention

[0005] In order to improve the problem that the existing PU film is easily torn due to the insertion or penetration of needles and threads, the present application provides an embroidery with a PU layer and a processing technology thereof.

[0006] This application provides an embroidery product with a PU layer, which adopts the following technical solution:

[0007] An embroidery with a PU layer comprises a mesh layer and a PU layer. The PU layer comprises the following raw materials, measured in parts by weight: 60-80 parts of polyether polyol, 50-70 parts of 2,4-toluene diisocyanate, 6-15 parts of vinyltrimethoxysilane, 25-35 parts of modified talc, 13-20 parts of modified glass fiber, 7-13 parts of glycerol triacetate, and 9-15 parts of graphene.

[0008] By adopting the above technical solution, the polyether polyol has high toughness and strength, good film-forming properties, can form a uniform and dense film layer, and can also improve the fluidity, adhesion, chemical corrosion resistance, heat resistance and weather resistance of the system, thereby improving the overall performance of the system; the polyether polyol and 2,4-toluene diisocyanate react to form a polyurethane elastomer with high elasticity and excellent physical properties, and vinyltrimethoxysilane is used as a surface treatment agent to form a polymer film on the surface of the material, thereby increasing the adhesion, wear resistance and corrosion resistance of the material.

[0009] Modified talcum powder has good stability, wear resistance, toughness, strength and adsorption, and can enhance the mechanical strength of the system. Modified glass fiber has good tensile strength, ductility, compressive strength and stiffness, and can form a three-dimensional network structure in the system, increasing the cohesion and flexural stiffness of the system. Graphene has good mechanical properties, ductility and chemical resistance, and can improve the elasticity, crack resistance and tear resistance of the system. Modified talcum powder can be loaded on the surface of graphene, and graphene can be loaded on the surface of modified glass fiber. Modified talcum powder, modified glass fiber and graphene cooperate with each other to jointly improve the mechanical properties of the system, so that the prepared PU layer has good mechanical strength and tear resistance, which will help the embroidery process in the future, allowing the needle and thread to be inserted into or penetrate the PU layer, and the PU layer is not easy to tear.

[0010] Preferably, the mass ratio of the modified talc powder, modified glass fiber and graphene is 2.1-3.2:1.2-2.2:1.

[0011] By adopting the above technical solution, the mass ratio of modified talc powder, modified glass fiber and graphene is further limited, and a composition with good mechanical strength and tear resistance is obtained. The modified talc powder can be loaded on the surface of the graphene, and the graphene loaded with modified talc powder can be loaded on the surface of the modified glass fiber. The modified talc powder, modified glass fiber and graphene cooperate with each other and have a synergistic effect, jointly improving the mechanical properties of the PU layer, which subsequently helps embroidery and is not easy to break.

[0012] Preferably, the preparation method of the modified talc powder comprises the following steps:

[0013] (1) Grinding talc powder, dispersing it in deionized water, adding a silane coupling agent, stirring at 78-82° C. for 30-40 minutes, filtering, and drying to obtain a mixture 1;

[0014] (2) dispersing chitosan fibers in a citric acid solution with a mass concentration of 2-3%, stirring at a temperature of 65-70° C. for 10-20 minutes, filtering, and drying to obtain a second mixture;

[0015] (3) Dispersing the mixture 1 of step (1) in deionized water, adding the mixture 2 of step (2), adding pectin, stirring at a temperature of 85-90° C. for 1-2 hours, filtering, and drying to obtain modified talc.

[0016] By adopting the above technical solution, talc powder is first ground to obtain powder, and a silane coupling agent is added for stirring to increase the interaction force between talc powder and other components, making the talc powder more evenly dispersed, reducing the agglomeration of talc powder, and improving the stability and consistency of the system.

[0017] Chitosan fiber has strong ductility, toughness and biocompatibility. Chitosan fiber is mixed with citric acid, so that chitosan macromolecules contact citric acid molecules, so that citric acid and amino groups on chitosan produce ionic crosslinking and chemical crosslinking, thereby improving the mechanical properties of chitosan fiber.

[0018] The mixture 1 of step (1) and the mixture 2 of step (2) are mixed and stirred, and the treated chitosan fibers can be loaded on the surface of the treated talcum powder, thereby enhancing the mechanical properties of the talcum powder. The pectin coats the talcum powder, thereby increasing the viscosity between the talcum powder and the chitosan fibers, making the chitosan fibers more stably loaded on the surface of the chitosan fibers, thereby increasing the mechanical stability of the talcum powder, and contributing to the subsequent improvement of the mechanical properties of the system.

[0019] Preferably, the mass ratio of the talc powder, chitosan fiber and pectin is 1:0.2-0.5:0.07-0.09.

[0020] By adopting the above technical solution, the mass ratio of talc, chitosan fiber and pectin is further limited within a certain range, thereby improving the mechanical strength and tear resistance of talc. The chitosan fiber is loaded on the surface of the talc, and the pectin increases the viscosity between the talc and the chitosan fiber, thereby improving the relevant properties of the talc. It is subsequently applied to the PU layer and has a high mechanical modification.

[0021] Preferably, the mass ratio of the talc powder to the silane coupling agent is 1:0.3-0.6.

[0022] By adopting the above technical solution, the mass ratio of talc powder and silane coupling agent is further limited within a certain range, and the talc powder and silane coupling agent are mixed and reacted, thereby increasing the interaction force between talc powder and other components, making the talc powder more evenly dispersed, reducing the agglomeration of talc powder, improving the stability and consistency of the system, and facilitating the subsequent mixing modification of talc powder and other components.

[0023] Preferably, the method for preparing the modified glass fiber comprises the following steps:

[0024] (1) dispersing the glass fiber in a potassium permanganate solution, stirring for 10-20 minutes, washing with water, and then dispersing it in a sodium hydroxide solution, washing with water, filtering, and drying to obtain treated glass fiber;

[0025] (2) grinding the ceramic powder, sieving it, dispersing it in ammonia water, washing it with water, and filtering it to obtain treated ceramic powder;

[0026] (3) Dispersing the glass fiber treated in step (1) in deionized water, adding the ceramic powder treated in step (2), stirring at a temperature of 75-80° C. for 1-2 hours, adding nanocellulose, continuing to stir, filtering, and drying to obtain modified glass fiber.

[0027] By adopting the above technical solution, the glass fiber and the potassium permanganate solution are mixed, and the potassium permanganate solution erodes the surface of the glass fiber to a certain extent, making the surface of the glass fiber uneven and porous, thereby increasing the specific surface area of ​​the glass fiber. The glass fiber is then dispersed in a sodium hydroxide solution, and the sodium hydroxide solution further erodes the surface of the glass fiber, further increasing the surface porous structure of the glass fiber, thereby improving the specific surface area of ​​the glass fiber.

[0028] Ceramic powder has an air-permeable microporous structure and has good hardness, wear resistance and corrosion resistance. Ceramic powder is treated with ammonia to remove organic impurities on the surface of the ceramic powder and increase the specific surface area of ​​the ceramic powder. Ceramic powder is mixed with glass fiber and can be loaded in the pore structure of the glass fiber, thereby improving the mechanical strength of the glass fiber. Nanocellulose has a certain viscosity and can increase the adhesion between ceramic powder and glass fiber, so that the ceramic powder is stably loaded on the surface of the glass fiber, thereby improving the stability of the mechanical properties of the glass fiber and contributing to the performance of the subsequent glass fiber-modified PU layer.

[0029] Preferably, the mass ratio of the glass fiber, ceramic powder and nanocellulose is 1:0.4-0.8:0.03-0.06.

[0030] By adopting the above technical solution, the mass ratio of glass fiber, ceramic powder and nanocellulose is further limited within a certain range, thereby improving the mechanical strength, wear resistance and tear resistance of the glass fiber. The ceramic powder can be loaded on the surface of the glass fiber, and the nanocellulose can coat the glass fiber, further improving the adhesion between the glass fiber and the ceramic powder, which helps to improve the corresponding performance of the subsequent PU layer.

[0031] Preferably, the stirring rate is 1200-1300 r / min.

[0032] By adopting the above technical solution, the stirring rate is further limited so that the components are mixed evenly, thereby helping to improve the performance stability of the system.

[0033] In a second aspect, the present application provides a processing technology for embroidery with a PU layer, comprising the following steps:

[0034] Preparation of PU layer: polyether polyol, 2,4-toluene diisocyanate, vinyl trimethoxysilane, modified talc, modified glass fiber, triacetin and graphene were mixed and stirred at 70-75°C for 2-3 hours to obtain a mixture, which was then obtained by knife coating to obtain a PU film;

[0035] The mesh layer is fixed, and the PU layer is covered on the upper side of the mesh layer. Then, embroidery is performed, and the PU layer is embroidered on the mesh layer using embroidery thread. The excess PU layer is removed using a laser to obtain an embroidery product with a PU layer.

[0036] By adopting the above technical solution, the embroidery with a PU layer obtained by the above method has good comprehensive performance. On the one hand, it can achieve the visual effect of wrinkles, and on the other hand, it can achieve the fixation of the PU layer. The obtained embroidery has good softness, breathability, and bending resistance.

[0037] Preferably, the thickness of the PU layer is 0.1-0.2 mm.

[0038] By adopting the above technical solution, the thickness of the PU layer is further limited, and the comprehensive properties of the PU layer, such as mechanical properties, are guaranteed, so that the prepared embroidery is soft and breathable.

[0039] In summary, this application has the following beneficial effects:

[0040] 1. The polyether polyol in this application has high toughness and strength, good film-forming properties, can form a uniform and dense film layer, and can also improve the fluidity, adhesion, chemical corrosion resistance, heat resistance and weather resistance of the system, thereby improving the overall performance of the system; the polyether polyol and 2,4-toluene diisocyanate react to form a polyurethane elastomer with high elasticity and excellent physical properties, and vinyltrimethoxysilane is used as a surface treatment agent to form a polymer film on the surface of the material, thereby increasing the adhesion, wear resistance and corrosion resistance of the material.

[0041] 2. The modified talc powder in this application has good stability, wear resistance, toughness, strength and adsorption, and can enhance the mechanical strength of the system. The modified glass fiber has good tensile strength, ductility, compressive strength and stiffness, and can form a three-dimensional network structure in the system, thereby increasing the cohesion and flexural stiffness of the system. Graphene has good mechanical properties, ductility and chemical resistance, and can improve the elasticity, crack resistance and tear resistance of the system.

[0042] 3. In this application, modified talc can be loaded on the surface of graphene, and graphene can be loaded on the surface of modified glass fiber. The modified talc, modified glass fiber and graphene cooperate with each other to improve the mechanical properties of the system, so that the prepared PU layer has good mechanical strength and tear resistance, which is helpful for the subsequent embroidery process, so that the needle and thread can be inserted into or penetrate the PU layer, and the PU layer is not easy to tear. DETAILED DESCRIPTION

[0043] The present application is further described in detail below with reference to the embodiments.

[0044] The raw materials used in the examples and comparative examples can all be obtained commercially.

[0045] Preparation example of modified talc

[0046] Preparation Example 1-1

[0047] The preparation method of modified talcum powder comprises the following steps:

[0048] (1) Grind 1.2 kg of talc powder, disperse it in 2.1 L of deionized water, add a silane coupling agent, stir at 80° C. for 35 min, filter, and dry to obtain a mixture 1;

[0049] (2) Dispersing chitosan fibers in 1.3 L of 2% citric acid solution, stirring at 67° C. for 15 min, filtering, and drying to obtain a second mixture;

[0050] (3) Disperse the mixture 1 of step (1) in 3 L of deionized water, add the mixture 2 of step (2), add pectin, stir at a temperature of 88° C. for 1.5 h, filter, and dry to obtain modified talc.

[0051] Among them, the mass ratio of talc powder, chitosan fiber and pectin is 1:0.2:0.09.

[0052] The mass ratio of talc powder to silane coupling agent is 1:0.6.

[0053] Preparation Example 1-2

[0054] The difference from Preparation Example 1-1 is that in step (1), no silane coupling agent is added.

[0055] Preparation Examples 1-3

[0056] The difference from Preparation Example 1-1 is that in step (2), chitosan fiber is not added.

[0057] Preparation Examples 1-4

[0058] The difference from Preparation Example 1-1 is that in step (3), no pectin is added.

[0059] Preparation Examples 1-5

[0060] The difference from Preparation Example 1-1 is that the mass ratio of talc powder, chitosan fiber and pectin is 1:0.5:0.07.

[0061] Preparation Examples 1-6

[0062] The difference from Preparation Example 1-1 is that the mass ratio of talc powder, chitosan fiber and pectin is 1:0.8:0.01.

[0063] Preparation Examples 1-7

[0064] The difference from Preparation Example 1-1 is that the mass ratio of talc powder to silane coupling agent is 1:0.3.

[0065] Preparation Examples 1-8

[0066] The difference from Preparation Example 1-1 is that the mass ratio of talc powder to silane coupling agent is 1:0.9.

[0067] Preparation example of modified glass fiber

[0068] Preparation Example 2-1

[0069] The preparation method of modified glass fiber comprises the following steps:

[0070] (1) 1.3 kg of glass fiber was dispersed in 2 L of 12% potassium permanganate solution, stirred for 15 min, washed with water, and then dispersed in 2.1 L of 8% sodium hydroxide solution, washed with water, filtered, and dried to obtain treated glass fiber;

[0071] (2) grinding the ceramic powder, passing it through a 20-mesh sieve, and then dispersing it in 1.5 L of 7% ammonia water, washing it with water, and filtering it to obtain treated ceramic powder;

[0072] (3) The glass fiber treated in step (1) was dispersed in 2.1 L of deionized water, and the ceramic powder treated in step (2) was added. The mixture was stirred at 78° C. for 1.5 h, and nanocellulose was added. The mixture was further stirred, filtered, and dried to obtain modified glass fiber.

[0073] The mass ratio of glass fiber, ceramic powder and nanocellulose is 1:0.8:0.03.

[0074] The stirring rate is 1200 r / min.

[0075] Preparation Example 2-2

[0076] The difference from Preparation Example 2-1 is that in step (2), no ceramic powder is added.

[0077] Preparation Example 2-3

[0078] The difference from Preparation Example 2-1 is that in step (3), no nanocellulose is added.

[0079] Preparation Example 2-4

[0080] The difference from Preparation Example 2-1 is that the stirring rate is 1300 r / min.

[0081] Preparation Example 2-5

[0082] The difference from Preparation Example 2-1 is that the mass ratio of glass fiber, ceramic powder and nanocellulose is 1:0.4:0.06.

[0083] Preparation Example 2-6

[0084] The difference from Preparation Example 2-1 is that the mass ratio of glass fiber, ceramic powder and nanocellulose is 1:0.1:0.09.

[0085] Example

[0086] Example 1

[0087] An embroidery with a PU layer comprises the following raw materials: a mesh layer and a PU layer. The PU layer comprises the following raw materials by weight: 60 kg of polyether polyol, 70 kg of 2,4-toluene diisocyanate, 15 kg of vinyl trimethoxysilane, 35 kg of modified talc, 20 kg of modified glass fiber, 13 kg of triacetin and 9 kg of graphene.

[0088] The processing technology of embroidery with a PU layer includes the following steps: preparing the PU layer: mixing polyether polyol, 2,4-toluene diisocyanate, vinyl trimethoxysilane, modified talc, modified glass fiber, triacetin and graphene, stirring at 75°C for 3 hours to obtain a mixture, and then applying the mixture by doctor blade coating to obtain a PU film;

[0089] The mesh layer is fixed, and the PU layer is covered on the upper side of the mesh layer, and then embroidery is performed. The PU layer is embroidered on the mesh layer using embroidery thread, and the excess PU layer is removed using a laser to obtain an embroidery with a PU layer; the thickness of the PU layer is 0.1-0.2 mm.

[0090] The modified talc powder was prepared according to Preparation Example 1-1, and the modified glass fiber was prepared according to Preparation Example 2-1.

[0091] Example 2

[0092] An embroidery with a PU layer, which differs from Example 1 in that it includes the following raw materials: 80 kg of polyether polyol, 50 kg of 2,4-toluene diisocyanate, 6 kg of vinyltrimethoxysilane, 25 kg of modified talc, 13 kg of modified glass fiber, 7 kg of triacetin, and 15 kg of graphene.

[0093] Example 3

[0094] An embroidery with a PU layer, which differs from Example 1 in that the modified talc powder is prepared using Preparation Example 1-2.

[0095] Example 4

[0096] An embroidery with a PU layer, which differs from Example 1 in that the modified talc powder is prepared using Preparation Examples 1-3.

[0097] Example 5

[0098] An embroidery with a PU layer, which differs from Example 2 in that the modified talc powder is prepared using Preparation Examples 1-4.

[0099] Example 6

[0100] An embroidery with a PU layer, which differs from Example 2 in that the modified talc powder is prepared using Preparation Examples 1-5.

[0101] Example 7

[0102] An embroidery with a PU layer, which differs from Example 2 in that the modified talc powder is prepared using Preparation Examples 1-6.

[0103] Example 8

[0104] An embroidery with a PU layer, which differs from Example 2 in that the modified talc powder is prepared using Preparation Examples 1-7.

[0105] Example 9

[0106] An embroidery with a PU layer, which differs from Example 2 in that the modified talc powder is prepared using Preparation Example 1-8.

[0107] Example 10

[0108] An embroidery with a PU layer, which differs from Example 2 in that the modified glass fiber is prepared using Preparation Example 2-2.

[0109] Example 11

[0110] An embroidery with a PU layer, which differs from Example 1 in that the modified glass fiber is prepared using Preparation Example 2-3.

[0111] Example 12

[0112] An embroidery with a PU layer, which differs from Example 1 in that the modified glass fiber is prepared using Preparation Examples 2-4.

[0113] Example 13

[0114] An embroidery with a PU layer, which differs from Example 1 in that the modified glass fiber is prepared using Preparation Example 2-5.

[0115] Example 14

[0116] An embroidery with a PU layer, which differs from Example 1 in that the modified glass fiber is prepared using Preparation Examples 2-6.

[0117] Example 15

[0118] An embroidery with a PU layer, which differs from Example 1 in that the mass ratio of modified talcum powder, modified glass fiber and graphene is 2.1:1.2:1.

[0119] Example 16

[0120] An embroidery with a PU layer, which differs from Example 1 in that the mass ratio of modified talc powder, modified glass fiber and graphene is 3.2:2.2:1.

[0121] Comparative Example

[0122] Comparative Example 1

[0123] An embroidery with a PU layer, which differs from Example 1 in that modified talcum powder is not added.

[0124] Comparative Example 2

[0125] An embroidery with a PU layer, which differs from Example 1 in that the modified talcum powder is replaced by an equal amount of talcum powder.

[0126] Comparative Example 3

[0127] An embroidery with a PU layer, which differs from Example 1 in that no modified glass fiber is added.

[0128] Comparative Example 4

[0129] An embroidery with a PU layer, which differs from Example 1 in that the modified glass fiber is replaced by an equal amount of glass fiber.

[0130] Comparative Example 5

[0131] An embroidery with a PU layer, which differs from Example 1 in that graphene is not added.

[0132] Performance testing

[0133] The PU layers prepared in Application Examples 1-16 and Comparative Examples 1-5 were subjected to mechanical property tests;

[0134] Determine the hardness of the PU layer according to GB / T 6739-2006;

[0135] The scratch resistance of the PU layer is measured by placing sandpaper on the surface of the PU layer and applying different loads to the sandpaper to determine the minimum mass at which a noticeable scratch appears.

[0136] The wear resistance of the protective film is measured by the average mass lost per 1000 revolutions on a friction and wear tester;

[0137] Tensile strength: The tensile strength was determined according to GB / T1040.3-2006, the elongation at break was tested according to GB / T1040, and the tear strength was tested according to GB / T529. The test results are shown in Table 1.

[0138] Table 1 Test data of embodiments and comparative examples

[0139]

[0140]

[0141] As can be seen from Table 1, the PU layers prepared in Examples 1-2, 6, 8, and 12-13 of the present application have excellent mechanical properties and mechanical strength. Among them, the pencil hardness of Example 1 is 5H, the scratch resistance is 82g, the wear resistance is 0.2mg, and the tensile strength is 58N / mm 2 , tear strength is 51N / mm 2 , and the elongation at break is 190%, indicating that the PU layer prepared in this application has excellent wear resistance, scratch resistance, tensile strength, tear strength and elongation at break, which makes the PU layer have long-term usability, reduces the chance of tearing, and helps the subsequent embroidery process.

[0142] In the preparation method of modified talc powder in Example 3, no silane coupling agent is added. As can be seen from Table 1, compared with Example 1, the pencil hardness is 5H, the scratch resistance is 78g, the wear resistance is 0.3mg, and the tensile strength is 53N / mm 2 , tear strength is 47N / mm 2 , the elongation at break is 185%, indicating that the addition of silane coupling agent for stirring increases the interaction force between talc and other components, makes the talc dispersed more evenly, reduces the agglomeration of talc, and improves the stability and consistency of the system.

[0143] In the preparation method of modified talc powder in Example 4, chitosan fiber is not added. As can be seen from Table 1, compared with Example 1, the pencil hardness is 4H, the scratch resistance is 73g, the wear resistance is 0.5mg, and the tensile strength is 47N / mm 2 , tear strength is 41N / mm 2 The elongation at break was 179%, indicating that chitosan fiber has strong ductility, toughness and biocompatibility, which will help to improve the corresponding properties of talc powder in the future.

[0144] In the preparation method of modified talc powder in Example 5, pectin is not added. As can be seen from Table 1, compared with Example 1, the pencil hardness is 5H, the scratch resistance is 77g, the wear resistance is 0.3mg, and the tensile strength is 52N / mm 2 , tear strength is 46N / mm 2The elongation at break was 183%, indicating that pectin coating of talc increased the viscosity between talc and chitosan fiber, increased the mechanical stability of talc, and contributed to the subsequent improvement of the mechanical properties of the system.

[0145] Example 7 changes the mass ratio of talc, chitosan fiber and pectin. It can be seen from Table 1 that compared with Example 1, the scratch resistance, tensile strength, tear strength and elongation at break are significantly better than those of Example 4 and Example 5, but worse than those of Example 1 and Example 6, indicating that the chitosan fiber is loaded on the surface of the talc, and the pectin increases the viscosity between the talc and the chitosan fiber, thereby improving the relevant properties of the talc. It is subsequently applied to the PU layer with high mechanical modification.

[0146] In Example 9, the mass ratio of talc and silane coupling agent was changed. As can be seen from Table 1, compared with Example 1, the scratch resistance, tensile strength, tear strength, and elongation at break were significantly better than those in Example 3, but worse than those in Example 1 and Example 8. This shows that the reaction of talc and silane coupling agent mixed together increases the interaction force between talc and other components, makes the talc more evenly dispersed, reduces the agglomeration of talc, improves the stability and consistency of the system, and facilitates the subsequent mixing and modification of talc and other components.

[0147] In the preparation method of Example 10, ceramic powder is not added. As can be seen from Table 1, compared with Example 1, the pencil hardness is 4H, the scratch resistance is 70g, the wear resistance is 0.7mg, and the tensile strength is 44N / mm 2 , tear strength is 37N / mm 2 The elongation at break is 174%, indicating that the ceramic powder has a breathable microporous structure, good hardness, wear resistance and corrosion resistance. The ceramic powder can be loaded in the pore structure of the glass fiber, thereby improving the mechanical strength of the glass fiber.

[0148] In the preparation method of Example 11, nanocellulose is not added. As can be seen from Table 1, compared with Example 1, the pencil hardness is 5H, the scratch resistance is 72g, the wear resistance is 0.6mg, and the tensile strength is 46N / mm 2 , tear strength is 39N / mm 2 The elongation at break is 175%, indicating that nanocellulose has a certain viscosity, which can increase the adhesion between ceramic powder and glass fiber, so that the ceramic powder is stably loaded on the surface of the glass fiber, thereby improving the mechanical properties stability of the glass fiber.

[0149] Example 14 changes the mass ratio of glass fiber, ceramic powder and nanocellulose. It can be seen from Table 1 that compared with Example 1, the scratch resistance, tensile strength, tear strength and elongation at break are significantly better than those of Example 10-11, but worse than those of Example 1 and Examples 12-13, indicating that the ceramic powder can be loaded on the surface of the glass fiber and the nanocellulose can coat the glass fiber, further improving the adhesion between the glass fiber and the ceramic powder, which helps to improve the corresponding performance of the subsequent PU layer.

[0150] Examples 15-16 change the mass ratio of talc, modified glass fiber and graphene. It can be seen from Table 1 that compared with Examples 1-2, the scratch resistance, tensile strength, tear strength and elongation at break are significantly better than those of Examples 1-2, indicating that the mass ratio of modified talc, modified glass fiber and graphene is further limited to obtain a composition with good mechanical strength and tear resistance. The modified talc, modified glass fiber and graphene cooperate with each other and have a synergistic effect, which jointly improves the mechanical properties of the PU layer, and subsequently helps embroidery and is not easy to break.

[0151] Comparative Example 1 does not add modified talc. As can be seen from Table 1, compared with Example 1, the pencil hardness is 3H, the scratch resistance is 61g, the wear resistance is 1.2mg, and the tensile strength is 32N / mm 2 , tear strength is 28N / mm 2 The elongation at break is 162%, indicating that the modified talc has good stability, wear resistance, toughness, strength and adsorption, which can enhance the mechanical strength of the system and subsequently improve the corresponding properties of the PU layer.

[0152] Comparative Example 2: Modified talc powder is replaced with an equal amount of talc powder. As can be seen from Table 1, compared with Example 1, the pencil hardness is 4H, the scratch resistance is 65g, the wear resistance is 0.9mg, and the tensile strength is 37N / mm 2 , tear strength is 33N / mm 2 The elongation at break is 170%, indicating that the modified talc powder prepared in this application has good mechanical properties such as strength and tear resistance, and subsequently significantly improves the corresponding properties of the PU layer.

[0153] Comparative Example 3 does not add modified glass fiber. As can be seen from Table 1, compared with Example 1, the pencil hardness is 3H, the scratch resistance is 59g, the wear resistance is 1.4mg, and the tensile strength is 30N / mm 2 , tear strength is 26N / mm 2 The elongation at break is 160%, indicating that the modified glass fiber has good tensile strength, ductility, compressive strength and stiffness, and can form a three-dimensional network structure in the system, increasing the cohesion and bending stiffness of the system.

[0154] Comparative Example 4: The modified glass fiber is replaced with an equal amount of glass fiber. As can be seen from Table 1, compared with Example 1, the pencil hardness is 4H, the scratch resistance is 64g, the wear resistance is 0.8mg, and the tensile strength is 36N / mm 2 , tear strength is 32N / mm 2 The elongation at break is 167%, indicating that the modified glass fiber prepared in this application has good mechanical properties such as strength and tear resistance, and subsequently significantly improves the corresponding properties of the PU layer.

[0155] Comparative Example 5 does not add graphene. As can be seen from Table 1, compared with Example 1, the pencil hardness is 3H, the scratch resistance is 63g, the wear resistance is 1.0mg, and the tensile strength is 34N / mm 2 , tear strength is 30N / mm 2 The elongation at break is 165%, indicating that graphene has good mechanical properties, ductility and chemical resistance, and can improve the elasticity, crack resistance and tear resistance of the system, and subsequently improve the corresponding performance of the PU layer.

[0156] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. An embroidery with a PU layer, characterized in that: The invention comprises a mesh layer and a PU layer, wherein the PU layer comprises the following raw materials in parts by weight: 60-80 parts of polyether polyol, 50-70 parts of 2,4-toluene diisocyanate, 6-15 parts of vinyltrimethoxysilane, 25-35 parts of modified talc, 13-20 parts of modified glass fiber, 7-13 parts of glycerol triacetate and 9-15 parts of graphene; The preparation method of the modified talc powder comprises the following steps: (1) Grind talc powder, disperse it in deionized water, add silane coupling agent, stir at 78-82°C for 30-40 minutes, filter, and dry to obtain a mixture; (2) dispersing chitosan fibers in a citric acid solution having a mass concentration of 2-3%, stirring at a temperature of 65-70° C. for 10-20 minutes, filtering, and drying to obtain a second mixture; (3) Dispersing the mixture 1 of step (1) in deionized water, adding the mixture 2 of step (2), adding pectin, stirring at a temperature of 85-90°C for 1-2 hours, filtering, and drying to obtain modified talc; The mass ratio of the talc powder, chitosan fiber and pectin is 1:0.2-0.5:0.07-0.09; The preparation method of the modified glass fiber comprises the following steps: (1) Dispersing the glass fiber in a potassium permanganate solution, stirring for 10-20 minutes, washing with water, and then dispersing it in a sodium hydroxide solution, washing with water, filtering, and drying to obtain treated glass fiber; (2) grinding the ceramic powder, sieving it, dispersing it in ammonia water, washing it with water, and filtering it to obtain treated ceramic powder; (3) dispersing the glass fiber treated in step (1) in deionized water, adding the ceramic powder treated in step (2), stirring at a temperature of 75-80°C for 1-2 hours, adding nanocellulose, continuing to stir, filtering, and drying to obtain modified glass fiber; The mass ratio of the glass fiber, ceramic powder and nanocellulose is 1:0.4-0.8:0.03-0.

06.

2. The embroidery with PU layer according to claim 1, characterized in that: The mass ratio of the modified talc powder, the modified glass fiber and the graphene is 2.1-3.2:1.2-2.2:

1.

3. The embroidery with PU layer according to claim 1, characterized in that: The mass ratio of the talc powder to the silane coupling agent is 1:0.3-0.

6.

4. The embroidery with PU layer according to claim 1, characterized in that: The stirring speed is 1200-1300 r / min.

5. The processing technology of embroidery with PU layer according to claim 1 is characterized in that: The steps include: Preparation of PU layer: polyether polyol, 2,4-toluene diisocyanate, vinyl trimethoxysilane, modified talc, modified glass fiber, triacetin and graphene were mixed and stirred at 70-75°C for 2-3 hours to obtain a mixture, which was then obtained by knife coating to obtain a PU film; The mesh layer is fixed, and the PU layer is covered on the upper side of the mesh layer. Then, embroidery is performed, and the PU layer is embroidered on the mesh layer using embroidery thread. The excess PU layer is removed using a laser to obtain an embroidery product with a PU layer.

6. The processing technology of embroidery with PU layer according to claim 5, characterized in that: The thickness of the PU layer is 0.1-0.2 mm.

Images