A method of forming a nylon spacer fabric

Abstract

The forming method of the nylon interlayer fabric provided by the application specifically comprises the following steps: pretreating nylon yarn; using a warping machine to warp the nylon yarn to ensure that the tension of each yarn is consistent, and then using a Karl Mayer double needle bed warp knitting machine to weave the arranged nylon yarn into an interlayer mesh fabric; feeding the woven interlayer mesh fabric into a setting machine for preheating treatment, and the temperature during preheating is 100 DEG C to 120 DEG C; after the preheating treatment, the mesh fabric is placed for 10 h to 12 h, and then formal setting is performed, the setting temperature is 160 DEG C to 170 DEG C, and the setting speed is 20 m / min to 25 m / min; the mesh fabric after setting is subjected to hot pressing and plastic sealing treatment, the temperature of the pressing mold is 145 DEG C to 160 DEG C, the time is 20 s to 25 s, and the peeling degree reaches 7N; and finally, the product is subjected to forming treatment. The forming method of the nylon interlayer fabric provided by the application can combine nylon and the interlayer fabric by using a special process, improve the physical and chemical properties thereof, not only improve the strength and wear resistance, but also improve the dyeing property, and the width stability of the interlayer fabric is also improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of spraying equipment, and particularly relates to a forming method of nylon interlining fabric. BACKGROUND

[0002] Nylon cloth is the first synthetic fiber in the world. Nylon is a polyamide fiber, and nylon cloth has good comprehensive performance, including mechanical properties, heat resistance, wear resistance, chemical resistance and self-lubricity, and has low friction coefficient, certain flame retardance, easy processing, and is suitable for glass fiber and other fillers to fill and enhance modification to improve performance and expand application range.

[0003] The excellent shock absorption, insulation and water absorption performance of the interlining fabric can make it a good material for industrial applications such as car seats, mattress, chair decorations, and for special clothes such as thermal underwear and elderly products. However, the interlining fabrics produced on the market at present are mostly made of polyester material, which has the following technical problems:

[0004] (1) poor strength, poor wear resistance, easy to ignite, and poor elastic recovery capacity;

[0005] (2) dyeing property is worse than that of nylon;

[0006] (3) the nylon interlining fabric has unstable size and loose structure;

[0007] As known, although the addition of a small amount of polyamide fiber in the interlining fabric can greatly improve the wear resistance and elastic recovery rate, and can withstand tens of thousands of folds without breaking, the above technical problems cannot be completely solved. SUMMARY

[0008] The present application aims to provide a forming method of nylon interlining fabric, which solves the technical problem of how to combine nylon and interlining fabric to improve the physical and chemical properties, not only improves the strength and wear resistance, but also improves the dyeing property, and the width stability of the interlining fabric is also improved.

[0009] A forming method of nylon interlining fabric, specifically comprising the following steps:

[0010] Step S1: pretreating nylon yarn;

[0011] Step S2: using a warping machine to warp to ensure that each thread has consistent tension;

[0012] Step S3: using a Karl Mayer double needle bed warp knitting machine to weave the finished nylon yarn into a mesh cloth;

[0013] Step S4: send the woven mesh cloth into the setting machine for preheating treatment, the temperature during preheating is 100-120℃;

[0014] Step S5: after the mesh cloth after preheating treatment is placed for 10-12h, formal setting, the setting temperature is 160-170℃, the setting speed is 20-25m / min;

[0015] Step S6: the mesh cloth after setting is processed by hot pressing and plastic sealing, the temperature of the pressing mold is 145-160℃, the time is 20-25s, reaching the standard of 7N peeling degree;

[0016] Step S7: finally, the product is processed by shaping.

[0017] In the step S3, when weaving, the "X" type hollow three-dimensional structure design is adopted, 100D / 34F nylon is used as the Z direction + 70D / 32F nylon as the surface organization, and the spacer fabric of 0.3-2cm can be made.

[0018] In the step S1, the nylon yarn pretreatment step is as follows:

[0019] Step S11: the nylon yarn is boiled at 92-95℃ for 2-2.5h;

[0020] Step S12: add silica powder to the epoxy resin structural adhesive, the mass percentage of silica powder in the whole epoxy resin structural adhesive is 15-20%, the nylon yarn is placed in a closed space, and an epoxy resin structural adhesive spray is formed;

[0021] Step S13: form a lubricating oil spray in the closed space, and stand for 1-2h;

[0022] Step S14: take out the nylon yarn in step S13 from the closed space, mix glass fiber in it, and the mass percentage of glass fiber in the nylon yarn is 30-40%.

[0023] In the step S12, aluminum oxide powder is added to the epoxy resin structural adhesive, and the mass percentage of aluminum oxide powder in the whole epoxy resin structural adhesive is 10-15%.

[0024] In the step S14, the components of the glass fiber are as follows according to the mass percentage: SiO2 is 54-58%, Al2O3 is 5-7%, CaO is 1-3%, MgO is 1-2%, Na2O is 2-3%, K2O is 1-2%, and colorant 30-35%.

[0025] In step S14, the material colorant is any one of copper oxide, cuprous oxide, gold atoms, compound colloidal particles, metal colloidal particles, and semiconductor coloring materials.

[0026] In step S14, the percentage of the content of the active colorant to SiO2 and Al2O3 is as follows:

[0027] Colorant content / (SiO2 + Al2O3) = 0.5-0.55.

[0028] In step S4, during preheating, inorganic pigment dye is sprayed onto the nylon interlayer fabric.

[0029] The positive effects of this invention are as follows:

[0030] (1) Because nylon contains hydrophilic groups - amide groups, it makes nylon easy to absorb water. However, after nylon absorbs a certain amount of water, it helps the orientation and crystallization movement of its internal macromolecules, allowing the internal macromolecules to tend to natural orientation and achieve the balance between internal crystallization and decrystallization, thereby eliminating its internal stress, greatly enhancing the toughness of nylon parts and basically eliminating brittleness.

[0031] (2) The addition of glass fiber to nylon has the following technical advantages:

[0032] First, by utilizing the reinforcement mechanism of glass fiber, the overall mechanical properties of the nylon interlayer fabric are improved;

[0033] Secondly, colorants are mixed into the glass fiber. Under the action of the colorants, the glass fiber is naturally a specific color and mixed into the nylon. That is, the nylon as a whole also presents a specific color without dyeing. This is a novel idea and different from the existing ideas of nylon dyeing.

[0034] The presence of colorants also increases the elastic modulus of nylon to some extent;

[0035] Third, the flame retardancy of glass fiber helps to achieve flame retardancy against nylon;

[0036] (3) Spraying epoxy resin structural adhesive and lubricating oil sequentially onto the nylon surface has the following technical effects:

[0037] First, as a composite material in which glass fiber and resin are well bonded, interfacial bond failure is highly unlikely. The intermolecular forces at the interface are greater than the cohesive strength of the resin, which can play a role in stress relaxation and buffering.

[0038] Secondly, by using epoxy resin structural adhesive, the adhesion strength of lubricating oil on nylon is increased, reducing the previous problem of lubricating oil falling off nylon. At the same time, epoxy resin structural adhesive has excellent bonding strength with nylon.

[0039] Third, the epoxy resin structural adhesive and lubricating oil cover prevent the nylon from losing moisture, thus avoiding a decrease in the strength of the nylon;

[0040] Fourth, adding silica powder and aluminum oxide powder to epoxy resin structural adhesive helps to increase the wear resistance, strength and elastic modulus of nylon, increases elastic recovery ability, enhances interfacial bonding force and inhibits crack propagation.

[0041] Fifth, after the nylon is coated with epoxy resin structural adhesive, the original step S4 helps to achieve and strengthen the shaping treatment of the nylon, increases the stability of its shape and size, and makes the structure dense.

[0042] (4) This design uses nylon as the raw material and adopts an "X" shaped hollow three-dimensional structure design during weaving. 100D / 34F nylon is used as the Z-direction and 70D / 32F nylon is used as the surface structure, which can be made into a 0.3cm to 2cm layered fabric. The unique "X" shaped support breaks through the 0-degree support of traditional cotton wadding and spray-bonded cotton loose fiber, which greatly improves the support density and the super breathability of the upper and lower layers. With a double-sided mesh design, it can form an oxygen circulation between the upper and lower layers, absorb moisture and wick away sweat, prevent the growth of bacteria and mites, and is skin-friendly and can be directly contacted by the human body. Through a special shaping process, the shrinkage ratio is controlled within 2%-3%, avoiding width instability and reducing labor costs and energy consumption.

[0043] (5) The fabric prepared by the above process can be widely used in clothing, footwear, home decoration and other fields. It has the characteristics of light weight, high strength, good elastic recovery, excellent wear resistance, good dyeability, high chemical resistance and good deformation resistance and aging resistance. Detailed Implementation

[0044] To more clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0045] Example 1

[0046] A method for forming a nylon interlayer fabric specifically includes the following steps:

[0047] Step S2: Use a warping machine to warp each nylon thread to ensure consistent tension;

[0048] Even better, to ensure that the tension of each thread is consistent, a long strip-shaped air jet channel is used to spray air into each thread at the same time. Since the air pressure of the air jet is consistent, the air pressure that the thread bears when the air pressure acts on each thread is also consistent. For looser threads, they will naturally deform with the air pressure, but the overall tension and air pressure can be kept consistent.

[0049] Step S3: Using a Karl Mayer double needle bed, the warp knitting machine weaves the prepared nylon yarn into a mesh fabric;

[0050] Step S4: Send the woven mesh into the setting machine for preheating treatment at a temperature of 110℃;

[0051] Step S5: After the preheated mesh is placed for 10 hours, it is formally shaped using a shaping machine at a shaping temperature of 160℃ and a shaping speed of 21 minutes.

[0052] In this embodiment, the nylon yarn is not pretreated first. According to the above parameters, the elastic modulus of the nylon mesh after shaping can reach 3.6-3.7 GPa, which is much greater than the elastic modulus of ordinary nylon materials (2.8-3.8 GPa). It can be seen that the shaping process in this solution plays an important role in improving the overall elastic modulus of nylon materials.

[0053] Step S6: The shaped mesh is hot-pressed and sealed. The molding temperature is 145℃ and the time is 21 seconds to achieve the 7N peel strength standard.

[0054] Step S7: Finally, the product is shaped.

[0055] In step S3, during weaving, an "X"-shaped hollow three-dimensional structure design is adopted, and 100D / 34F nylon is used as the Z-direction + 70D / 32F nylon is used as the surface structure, which can be made into a 1.5cm layered fabric.

[0056] Example 2

[0057] In this embodiment, step S1 is used to pre-treat the nylon yarn;

[0058] In step S1, the nylon yarn pretreatment step is as follows:

[0059] Step S11: Boil the nylon yarn at 93°C for 2.1 hours;

[0060] Step S12: Add silica powder to the epoxy resin structural adhesive. The silica powder accounts for 17% of the total mass of the epoxy resin structural adhesive. Place the nylon yarn in a closed space and spray the epoxy resin structural adhesive.

[0061] Step S13: In a closed space, form a lubricating oil spray and let it stand for 1.5 hours;

[0062] When spraying epoxy resin structure and lubricating oil, the nozzle flow rate is 0.08-0.12L / min, the working pressure is 40-70kg, the orifice diameter is 0.15mm, the atomized particles are about 5-15μm, the distance between the nozzle and the nylon yarn is 0.8-1.0m, the nozzle moving speed is 50cm / s, and one spraying is sufficient to form one layer.

[0063] Step S14: Take the nylon yarn from step S13 out of the enclosed space and mix it with glass fiber. The mass percentage of glass fiber in the nylon yarn is 33%.

[0064] In step S12, aluminum oxide powder is added to the epoxy resin structural adhesive, and the mass percentage of aluminum oxide powder in the total epoxy resin structural adhesive is 12%.

[0065] In step S14, the glass fiber composition by mass percentage is as follows: SiO2 54%-58%, Al2O3 5%-7%, CaO 1%-3%, MgO 1%-2%, Na2O 2%-3%, K2O 1%-2%, and colored agent 30%-35%.

[0066] In step S14, the material colorant is any one of copper oxide, cuprous oxide, gold atoms, compound colloidal particles, metal colloidal particles, and semiconductor coloring materials.

[0067] In step S14, the percentage of the content of the active colorant to SiO2 and Al2O3 is as follows:

[0068] More preferably, the ratio of colorant / (SiO2+Al2O3) is 0.5-0.55. Extensive experiments have shown that, considering the overall production cost, only within this ratio range can the glass fiber mixed with nylon produce a noticeably prominent color when combined with the specific composition range of the glass fiber in this solution.

[0069] Preferably, the ratio of colored agent to (SiO2+Al2O3) is 0.54.

[0070] After adding glass fiber, epoxy resin structural adhesive, silica powder, and alumina powder to nylon, the elastic modulus of the shaped nylon mesh, within the aforementioned test parameter range, can be consistently measured to be 8.8-9.5 GPa. When nylon + 33% glass fiber + epoxy resin structural adhesive (containing silica and alumina), the measured elastic modulus can reach 8.95 GPa, while the measured elastic modulus of unshaped nylon + 33% glass fiber is approximately 6.8 GPa. Therefore, the elastic modulus of the nylon interlayer fabric treated with this method is significantly improved.

[0071] In step S4, during preheating, inorganic pigment dye is sprayed onto the nylon interlayer fabric.

[0072] Inorganic pigment dyes exhibit the same color as soluble colorants in glass fibers, which helps to deepen the corresponding color modifications. The types of inorganic pigment dyes are prior art to those skilled in the art and will not be detailed here.

[0073] Regarding colored agents, in detail:

[0074] When copper in glass fiber exists as high-valence copper oxide, the glass appears blue-green; when it exists as low-valence cuprous oxide, the glass appears red. When a small amount of gold is added to the glass fiber formulation, after two heating cycles, the gold atoms polymerize into colloidal particles, at which point the glass fiber appears red.

[0075] For coloring of colloidal particles in glass fibers, for example, adding sulfur or selenium compounds to zinc-containing glass fibers to form CdO, ZnS, ZnSe, etc. in the glass, and then performing two heat treatments below the annealing temperature to form CdS and CdSe and grow into larger colloidal particles, the glass is colored by light scattering, such as selenium red, cadmium yellow, etc.

[0076] For coloring metal colloidal particles, for example, adding oxides of gold, silver, and copper to glass fiber raw materials can form glass in colors such as gold red, copper red, and silver yellow.

[0077] For semiconductor coloring, for example, adding colorants such as CdS, CdSe, and CdTe to glass fibers will make the glass fibers orange, CdSe red, and CdTe black.

[0078] The technical features of this invention not described can be implemented by or using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this invention, and this invention is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention should also be within the protection scope of this invention.

Claims

1. A method for forming a nylon interlayer fabric, characterized in that, Specifically, the steps include the following: Step S1: Pre-treat the nylon yarn; In step S1, the nylon yarn pretreatment step is as follows: Step S11: Boil the nylon yarn in water at 92℃-95℃ for 2-2.5 hours; Step S12: Add silica powder and aluminum oxide powder to the epoxy resin structural adhesive. The mass percentage of silica powder in the total epoxy resin structural adhesive is 15%-20%, and the mass percentage of aluminum oxide powder in the total epoxy resin structural adhesive is 10%-15%. Place the nylon yarn in a closed space and form an epoxy resin structural adhesive spray. Step S13: In a closed space, form a lubricating oil spray and let it stand for 1-2 hours; Step S14: Remove the nylon yarn from the enclosed space in step S13 and mix it with glass fiber. The mass percentage of glass fiber in the nylon yarn is 30%-40%. Step S2: Use a warping machine to warp the threads to ensure consistent tension on each thread; Step S3: Use a Karl Mayer double needle bed warp knitting machine to weave the prepared nylon yarn into a mesh fabric; In step S3, during weaving, an "X"-shaped hollow three-dimensional structure design is adopted, and 100D / 34F nylon is used as the Z direction + 70D / 32F nylon is used as the surface structure to make a 0.3cm to 2cm layered fabric. Step S4: Send the woven mesh into the setting machine for preheating treatment. The preheating temperature is 100℃-120℃. In step S4, during preheating, inorganic pigment dye is sprayed onto the nylon interlayer fabric. Step S5: After the preheated mesh is placed for 10-12 hours, it is then formally shaped at a temperature of 160℃-170℃ and a shaped speed of 20m / min-25m / min. Step S6: Perform hot-press sealing on the shaped mesh fabric. The molding temperature is 145℃-160℃ and the time is 20-25 seconds to achieve the 7N peel strength standard. Step S7: Finally, the product is shaped.

2. The method for forming the nylon interlayer fabric according to claim 1, characterized in that, In step S14, the glass fiber composition by mass percentage is as follows: SiO2 54%-58%, Al2O3 5%-7%, CaO 1%-3%, MgO 1%-2%, Na2O 2%-3%, K2O 1%-2%, and colored agent 30%-35%.

3. The method for forming the nylon interlayer fabric according to claim 2, characterized in that, In step S14, the material colorant is any one of copper oxide, cuprous oxide, gold atoms, compound colloidal particles, metal colloidal particles, and semiconductor coloring materials.

4. The method for forming the nylon interlayer fabric according to claim 3, characterized in that, In step S14, the percentage of the content of the active colorant to SiO2 and Al2O3 is as follows: Colorant content / (SiO2 + Al2O3) = 0.5-0.55.