High-strength air-jet texturing yarn training clothes fabric and processing technology thereof

Abstract

The invention discloses a high-strength air-jet texturing yarn training clothes fabric and a processing technology thereof, and relates to the technical field of functional composite fabrics, and the processing technology comprises the following steps: sequentially dipping yarns in a dipping solution containing phosphoric acid acrylate, taking out, drying and curing; spinning to form gray fabric; performing post-treatment, drying and shaping to obtain the fabric of the exercise and training clothes; the yarns are obtained by doubling and twisting polyester, vinylon and interlaced yarns and cotton fibers; and the polyester is one or a mixture of two of polyester air-jet textured yarns and polyester fibers. By introducing the polyester air-jet textured yarns, cohesive force among fibers is enhanced, the strength and the resistance to frictional wear of the fabric are improved, and the stability and the durability of the fabric are improved; and the fabric has better moisture absorption and ventilation effects. According to the method, the yarn is soaked, alkenyl monomers are copolymerized on the surface of the yarn, and through chemical covalent cross-linking and physical and mechanical effects, the bonding tightness between fibers is improved, and the strength and wear resistance of the yarn and the fabric made of the yarn are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of functional composite fabrics, and specifically to a high-strength air-jet textured yarn work uniform fabric and its processing technology. Background Art

[0002] As an important part of the individual soldier system, the work uniform is a standard clothing worn by soldiers during combat, training, and performing duties, which plays a role in protecting the human body from environmental factors. This requires its fabric to have good abilities to resist tensile fracture, tearing, bursting, and abrasion, etc., and it is necessary to ensure that the fabric has good air permeability and moisture permeability, so that the heat and sweat emitted by the human body can pass through smoothly. Air texturing, also known as jet texturing, refers to a processing method of using compressed air to spray and process filaments to obtain fluffiness and endow it with some characteristics similar to those of staple fiber yarns. Its product is called air-jet textured yarn, abbreviated as ATY, which has a fluffy feeling and a soft feeling, and can enhance the wet and heat comfort performance of clothing fabrics to a certain extent. However, after air texturing, the strength of the yarn will be lost. Therefore, we propose a high-strength air-jet textured yarn work uniform fabric and its processing technology. Summary of the Invention

[0003] The purpose of the present invention is to provide a high-strength air-jet textured yarn work uniform fabric and its processing technology to solve the problems raised in the above background art.

[0004] To solve the above technical problems, the present invention provides the following technical solutions:

[0005] A processing technology for a high-strength air-jet textured yarn work uniform fabric includes the following processes:

[0006] Immerse the yarn in an impregnating solution containing phosphoric acid acrylate in sequence, take it out and dry and cure it to form a modified yarn loaded with phosphoric acid acrylate; weave to form a grey cloth;

[0007] Perform post-treatment on the grey cloth, dry and shape it to form a hydrophilic layer, and obtain the work uniform fabric.

[0008] Further, the yarn includes polyester, vinylon, and cotton fiber;

[0009] Specifically, it is prepared by the following processes:

[0010] Card the vinylon and polyester together, and card the cotton fiber to respectively form polyester-vinylon sliver and cotton sliver;

[0011] Draw the polyester-vinylon sliver, and then blend it with the cotton sliver to form a polyester-vinylon-cotton drawn sliver;

[0012] Then perform roving, spinning, winding, and doubling twisting in sequence to form the required yarn.

[0013] Furthermore, the dry weight per unit length of the polyester-viscose sliver is 18.5 - 21.6 g / 5 m;

[0014] The dry weight per unit length of the cotton sliver is 17.0 - 21.6 g / 5 m;

[0015] The drawing process for the polyester-viscose sliver is as follows: 6 strands of the polyester-viscose sliver are combined, and the draft in the back zone is 1.5 - 1.8 times; the dry weight per unit length of the resulting polyester-viscose drawn sliver is 18.5 - 19.8 g / 5 m;

[0016] The mixing and drawing process is as follows: 1 strand of cotton sliver and 5 - 8 strands of polyester-viscose drawn sliver are combined, and the draft in the back zone after combination is 1.7 - 1.9 times to obtain a pre-drawn sliver with a dry weight per unit length of 18.5 - 21.0 g / 5 m;

[0017] 7 - 8 strands of the pre-drawn sliver are combined for the second drawing, and the draft in the back zone for the second drawing is 1.4 - 1.5 times to obtain a second-drawn sliver with a dry weight per unit length of 19.0 - 19.5 g / 5 m;

[0018] 7 - 8 strands of the second-drawn sliver are combined for the third drawing, and the draft in the back zone for the third drawing is 1.3 - 1.4 times to obtain a polyester-cotton drawn sliver with a dry weight per unit length of 19.0 - 19.8 g / 5 m;

[0019] The roving process is as follows: the total draft multiple is 6.0 - 6.5 times, the draft in the back zone is 1.2 - 1.4 times, the dry weight per unit length of the roving is 6.0 - 6.5 g / 10 m, and the twist factor of the roving is 70 - 75;

[0020] The spinning process is as follows: the total draft multiple is 36 - 40 times, the draft in the back zone is 1.15 - 1.25 times, and the twist of the spun yarn is 125 - 140 turns / 10 cm;

[0021] The winding process is as follows: the winding speed of the yarn is 1200 - 1500 m / min;

[0022] The doubling and twisting process is as follows: the spindle speed is 9000 rpm, S twist, the temperature is 21 - 25 °C, and the humidity is 60% - 70%.

[0023] Furthermore, the mass ratio of polyester, vinylon, and cotton fibers is (60 - 70):(15 - 25):(15 - 25).

[0024] Furthermore, the polyester includes 20% - 30% polyester air-jet textured yarn and 70% - 80% polyester fiber.

[0025] Furthermore, the linear density of the yarn is 16 - 20 tex.

[0026] Furthermore, the fabric for the combat uniform is one of plain weave and twill weave.

[0027] Furthermore, the surface density of the fabric for the combat uniform is 180 - 210 g / m 2 ;

[0028] The warp density is 280 - 310 threads / 10 cm; the weft density is 194 - 220 threads / 10 cm.

[0029] In the above technical solution, the yarn is obtained by false-twisting polyester, vinylon and network yarn, and cotton fiber. The vinylon has a small elongation at break, which is different from that of polyester and cotton fiber, and the surface of vinylon is relatively smooth, so it is easy to break and slip. Therefore, mixing polyester and vinylon first to make their elongation at break similar to that of cotton fiber helps to improve the spinnability of the yarn, reduce the slippage of fibers, avoid fiber breakage during the blending process, and improve the tightness of the yarn.

[0030] Among them, the polyester includes polyester air-jet textured yarn and polyester fiber. Compared with polyester fiber, due to the influence of its structural characteristics, the polyester air-jet textured yarn (air-jet textured yarn) has an enhanced fiber cohesion and is not easily pulled out or broken, which improves the spinnability of the yarn. The fabric has better resistance to friction and wear, and its integrity can be maintained for a long time, which extends the service life of the fabric. The polyester air-jet textured yarn has better bulkiness, allowing air to flow freely between the fibers, achieving good air permeability, effectively avoiding the stuffy feeling during use, and maintaining skin comfort. The yarn and fabric made by drawing the polyester air-jet textured yarn and polyester fiber, etc. have a complex interwoven structure, with stable and consistent deformation, and can withstand large external forces while still maintaining good strength, which improves the stability and durability of the fabric.

[0031] While the polyester ensures the strength and elasticity of the fabric, the cotton fiber and vinylon in the yarn have good hygroscopicity, making the fabric surface smooth, not easy to pilling, and having good skin-friendly air permeability and durability. When blended in the yarn, together with the complex interwoven structure affected by the air-jet textured yarn, the moisture evaporation area of the fabric increases with the increase of the specific surface area of the tissue, which effectively improves the wicking effect of the fabric and has better moisture absorption and air permeability.

[0032] Furthermore, the impregnating solution includes impregnating solution A and impregnating solution B;

[0033] The impregnating solution A includes the following mass components: 2 - 5 g / L vinyl epoxyethane, 0.2 - 0.5 g / L emulsifier;

[0034] The impregnating solution B includes the following mass components: 20 - 60 g / L acrylate emulsion, 0 - 30 g / L polyether block modified amino silicone oil, and the pH is 4.2 - 5.0.

[0035] Furthermore, the impregnating process is: placing the yarn in the impregnating solution A at 90 - 100 °C, impregnating for 20 - 40 min, and the bath ratio is 1:(10 - 20); dewatering and drying;

[0036] Then it is placed in immersion liquid B at 60 - 80°C and immersed for 30 - 50 min, followed by two immersions and two rollings, with a liquor pickup rate of 60% - 90% and a bath ratio of 1:(10 - 50).

[0037] Furthermore, the acrylate emulsion is obtained by mixing vinyl monomers, emulsifiers, and deionized water, followed by shear emulsification and then adding initiators:

[0038] The acrylate emulsion comprises the following mass components: 10 - 60 g / L of vinyl monomers, 1 - 6 g / L of emulsifiers, and 0.2 - 0.5 g / L of initiators.

[0039] Furthermore, the initiator is one of ammonium persulfate and potassium persulfate;

[0040] The emulsifier is a fatty alcohol polyoxyethylene ether non-ionic surfactant.

[0041] Furthermore, the vinyl monomers include 25 - 30 parts of diacrylate, 15 - 20 parts of dimethacrylate, 6 - 10 parts of reactive acrylate, 1 - 2 parts of vinyl-terminated polydimethylsiloxane, and 4.7 - 6.2 parts of phosphoric acid acrylate.

[0042] Furthermore, the diacrylate is one or a mixture of more than one of 1,10-decanediol diacrylate, butanediol diacrylate, pentanediol diacrylate, 1,6-hexanediol diacrylate, diethylene glycol diacrylate, tetraethylene glycol diacrylate, triethylene glycol diacrylate, dipropylene glycol diacrylate, 1,3-adamantanediol diacrylate, allyl diglycol dicarbonate, m-xylene glycol diacrylate, cyclohexanedimethanol diacrylate, 1,12-dodecanediol 2-methyl-2-propenoate, 1,9-nonanediol 2-methyl-2-propenoate;

[0043] The dimethacrylate is one or a mixture of more than one of ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, pentaethylene glycol dimethacrylate, pentaerythritol dimethacrylate, diglycol dimethacrylate, 1,6-hexanediol dimethacrylate, neopentyl glycol dimethacrylate, 1,4-butanediol dimethacrylate, 1,3-propanediol dimethacrylate;

[0044] The reactive acrylate is a hydroxy acrylate, and is selected from one or a mixture of more than one of 2,3-dihydroxypropyl acrylate, allyl hydroxyethyl ether, caffeic acid, p-hydroxycinnamic acid, m-hydroxycinnamic acid, 2,4-dihydroxycinnamic acid, 4-allyl catechol, 6-hydroxyhexyl acrylate, 5-hydroxypentyl acrylate, 4-hydroxybutyl acrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate, hydroxyethyl acrylate, hydroxyethyl methacrylate, N-(hydroxymethyl)acrylamide.

[0045] In the above technical solution, the yarn can be directly impregnated with impregnating solution B without passing through impregnating solution A. Polyester can be pretreated with alkali to hydrolyze the ester groups on its surface to generate hydroxyl groups; the surfaces of vinylon and cotton fibers also contain functional groups such as hydroxyl groups. By impregnating with impregnating solution A, its component vinyl ethylene oxide reacts with the hydroxyl groups to load carbon-carbon double bonds on the surface of the fiber, making it functionalized. Then, it is impregnated with impregnating solution B. At high temperature, the initiator plays a role, initiating the copolymerization of the vinyl monomer and the surface of the functionalized yarn to form a copolymer, and obtaining a modified yarn.

[0046] The vinyl monomers are all small molecules, which can diffuse efficiently and enter the yarn fibers. The specific components include diacrylate, dimethacrylate, vinyl-terminated polydimethylsiloxane, and phosphoric acid acrylate. They are all multi-functional copolymerization monomers with two vinyl groups, which can undergo free radical copolymerization reactions to form a network cross-linked structure and deposit on the fiber surface. Through chemical covalent cross-linking and physical mechanical effects, the binding tightness between the fibers is improved, and the relative slippage of the fibers is restricted, thus significantly improving the strength of the yarn and the fabric made therefrom. At the same time, the fabric prepared from the modified yarn has good stiffness and flexibility. Under dry friction, the adhesion between the fabrics and between the fabric and the skin is reduced, which helps to improve the wear resistance of the fabric, relieve skin damage caused by friction, and improve its durability, service life and comfort.

[0047] The vinyl monomer also contains reactive acrylate, and its hydroxyl functional group can improve the hydrophilicity of the yarn and the fabric made therefrom to a certain extent, and increase the number of surface active groups of the modified yarn, so as to facilitate the smooth implementation of subsequent processes.

[0048] Furthermore, the phosphoric acid acrylate is prepared by the following process:

[0049] Mix the methylated amino resin, diol and catalyst, stir and heat to 80 - 90 °C, and react for 120 - 180 min under vacuum negative pressure conditions; carry out vacuum distillation to obtain hydroxyl melamine resin;

[0050] Mix bis(trihydroxymethylpropane) bisphosphoryl chloride and hydroxyl melamine resin in N,N-dimethylformamide, heat to 150 - 155 °C, and reflux for 60 - 80 min;

[0051] Add hydroxyl acrylate and inhibitor, and continue to react for 60 - 90 min; filter, wash, and dry under vacuum to obtain phosphoric acid acrylate.

[0052] Further, the diol is one or a mixture of more than one of ethylene glycol, methyl propylene glycol, 1,3 - butanediol, 2,3 - butanediol, 1,4 - dithio - 2,5 - diol, 2,3 - dihydroxy - 1,4 - dioxane, and cyclooctane - 1,5 - diol;

[0053] The molar ratio of the methylated amino resin to the diol is 1:(6.3 - 6.6);

[0054] The catalyst is p - toluenesulfonic acid, and its dosage is 0.15% - 0.25% of the total mass of the methylated amino resin and the diol.

[0055] Further, the mass ratio of the hydroxymelamine resin, bis(trimethylolpropane) bisphosphoryl chloride (CAS No: 99835 - 67 - 3), and hydroxyacrylate is 10:(18.3 - 31.3):(4.9 - 14.9);

[0056] The vacuum negative pressure condition is 800 mbar;

[0057] The inhibitor is p - methoxyphenol, and its dosage is 0.3% - 0.4% of the mass of the hydroxyacrylate.

[0058] Further, the process conditions for drying and curing are as follows: pre - bake at 80 - 100 °C for 3 - 5 min, and then bake at 160 - 175 °C for 2.5 - 3.0 min; wash with water and dry until the moisture content of the yarn is 10% - 20%.

[0059] In the above technical solution, under the action of the catalyst, the methylated amino resin and the diol undergo an ether - exchange reaction to form an amino resin with multiple hydroxyl groups, denoted as hydroxymelamine resin. Then, the hydroxyl groups in the hydroxymelamine resin and the hydroxyacrylate react with the phosphoryl chloride in bis(trimethylolpropane) bisphosphoryl chloride in sequence to form a melamine resin with an unsaturated double - bond and a phosphoric acid ester heterocyclic structure, denoted as phosphoric acid acrylate. The ether bonds and phosphoric acid esters in the product structure have good hydrophilicity, which can play the role of a surfactant to a certain extent, promote its water dispersion and emulsification in the acrylate emulsion, increase the lubricating performance of the yarn surface, reduce its surface friction coefficient, reduce the friction between the modified yarns and between the fabric made therefrom and the skin, and help improve its friction damage and wear - resistance performance; and can improve the hydrophilicity, antistatic property, and wash - resistance performance of the modified yarn and its fabric.

[0060] Meanwhile, phosphoric acid acrylate has a significant impact on the mechanical properties, thermal stability, and flame retardancy of yarns and fabrics. Its structure contains a triazine ring and a phosphoric acid ester heterocycle. When it copolymerizes with other monomers to form a network cross-linked structure, the rigidity of the molecular chain is increased, the density and cohesion between fibers are enhanced, and their free movement is restricted, thereby improving the strength and thermal stability of the fabric. It can also decompose during combustion to produce nitrogen- and phosphorus-containing gases, release water, and form a dense carbon layer, diluting the concentration of surrounding combustible gases and blocking the transfer of heat and combustible gases, thus preventing the further spread of the flame and improving its flame retardancy ability.

[0061] Further, the post-treatment process is as follows: Place the grey fabric in a chitosan solution, impregnate it at a temperature of 60 - 80°C for 30 - 90 min; dip and roll twice, with a liquor pickup rate of 60% - 80% and a bath ratio of 1:(10 - 30).

[0062] Further, the concentration of the chitosan solution is 5 - 7 g / L, and the pH is 4.2 - 4.8.

[0063] Further, the process conditions for drying and shaping are as follows: Bake at a temperature of 100 - 120°C for 5 - 10 min; dry at a temperature of 60 - 80°C for 2 - 3 h.

[0064] Further, the chitosan solution is prepared by the following process:

[0065] Mix chitosan and glacial acetic acid solution, heat to 60 - 65°C, and stir until completely dissolved; cool to 20 - 30°C, add sodium periodate, and react in the dark for 2 - 3 h; add absolute ethanol to terminate the reaction, dialyze, and vacuum dry to obtain aldehyde-functionalized chitosan;

[0066] Mix aldehyde-functionalized chitosan and glacial acetic acid, stir and swell for 2 h; add nitric acid, phosphoric acid, and sodium nitrate, stir and react in the dark at a temperature of 35 - 40°C for 2 - 3 h; add absolute ethanol to terminate the reaction, let stand, filter, wash the precipitate, soak it in acetone, filter, and vacuum dry to obtain carboxyl-functionalized chitosan;

[0067] Add deionized water, heat to 60 - 70°C, and stir to dissolve to obtain the chitosan solution.

[0068] Further, the mass ratio of chitosan to sodium periodate is 10:(3.2 - 10.7);

[0069] The ratio of chitosan to glacial acetic acid solution is 2 g / 100 mL, and the concentration of the glacial acetic acid solution is 2 v%.

[0070] Further, the ratio of aldehyde-functionalized chitosan to glacial acetic acid is 2 g / 100 mL, and the concentration of the glacial acetic acid solution is 2 v%;

[0071] The ratio of aldehyde - group - modified chitosan, nitric acid, phosphoric acid, and sodium nitrate is 10 g:(19 - 25) mL:(18.5 - 12.5) mL:(0.50 - 0.55) g;

[0072] The concentration of nitric acid is 96 - 98 wt%, and the concentration of phosphoric acid is 85 wt%.

[0073] In the above - mentioned technical solution, after the modified yarn is woven, it is placed in a chitosan solution for post - treatment. The chitosan solution is prepared from carboxyl - group - modified chitosan. Under the oxidation of sodium periodate, the C2 and C3 positions on the glucosyl group of the chitosan chain undergo ring - opening oxidation to form aldehyde groups, obtaining aldehyde - group - modified chitosan. Then, using the nitric acid / phosphoric acid - sodium nitrate oxidation system, the C6 position of the aldehyde - group - modified chitosan is selectively oxidized to oxidize its primary hydroxyl group to a carboxyl group, obtaining carboxyl - group - modified chitosan. Compared with the hydroxyl group, the carboxyl group has better hydrophilicity, which effectively improves the water solubility of chitosan, and while ensuring its moisture absorption, air permeability, and antibacterial properties, aldehyde groups are introduced. Under low - pH conditions, a covalent cross - link occurs between the modified yarn and the carboxyl - group - modified chitosan, and a hemi - acetal reaction between the hydroxyl group and the aldehyde group occurs and deposits on the yarn surface. The carboxyl - group - modified chitosan cross - links into a film on the yarn surface and fills the voids, making the cross - over area between the warp and weft yarns smoother, reducing the friction between the skin and the fabric. The friction coefficient between the fabric and the skin in both dry and wet states is reduced, and the resulting skin damage is alleviated; the wash - resistance of the fabric is improved. The content of hydrophilic groups in the fabric increases, effectively improving the moisture absorption effect of the fabric; and it can reduce the surface tension of water on the fabric surface, reduce the wet friction between the skin and the fabric, relieve friction damage, and improve its wet - friction performance. At the same time, chitosan contains abundant elements such as nitrogen and phosphorus, which can inhibit the continuation of the thermal decomposition reaction, prevent the spread of flames, and can form a dense charred layer to block heat and flammable gases, improving the flame - retardant performance of the fabric.

[0074] If the impregnation process is placed after the preparation of the grey fabric, the combined action of the copolymerization of vinyl monomers and the cross - linking of carboxyl - group - modified chitosan on the grey fabric will, to a certain extent, affect the air - permeability and moisture - permeability of the fabric. Therefore, the impregnation process is placed after the preparation of the yarn. Specific Embodiments

[0075] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0076] In the following specific embodiments, the "parts" are all parts by mass; all weaving adopts compact spinning;

[0077] Cotton fiber: linear density 1.64 dtex, length 28 mm, sourced from ZhongSheng Health Textile Co., Ltd.;

[0078] Polyester fiber: linear density 2.2 dtex, length 83 mm, sourced from Zhangjiagang Rongchang Polyester Top Co., Ltd.;

[0079] Polyester air-jet textured yarn: 2.45 dtex, sourced from Zhejiang Jinxia New Material Technology Co., Ltd.;

[0080] Vinylon: linear density 1.66 dtex, length 38 mm, sourced from Shenzhen Huasu Technology Development Co., Ltd.;

[0081] The yarn is produced by the following process: Blend and card the vinylon and polyester, and card the cotton fiber to form a polyester-vinylon sliver with a dry weight per unit length of 19.6 g / 5 m and a cotton sliver with a dry weight per unit length of 19.6 g / 5 m respectively; Draw six polyester-vinylon slivers in the drawframe, with a back zone draft of 1.5 times to form a polyester-vinylon drawframe sliver with a dry weight per unit length of 18.8 g / 5 m; Combine one cotton sliver and seven polyester-vinylon drawframe slivers, with a back zone draft of 1.8 times after combination to obtain a pre-drawn sliver with a dry weight per unit length of 21.0 g / 5 m; Draw eight pre-drawn slivers in the second drawframe, with a back zone draft of 1.5 times to obtain a second drawframe sliver with a dry weight per unit length of 19.1 g / 5 m; Draw eight second drawframe slivers in the third drawframe, with a back zone draft of 1.36 times to obtain a polyester-vinylon-cotton drawframe sliver with a dry weight per unit length of 19.4 g / 5 m; Then perform roving in sequence, with the process parameters: total draft multiple 6.5 times, back zone draft 1.4 times, roving dry weight per unit length 6.3 g / 10 m, roving twist factor 74; Perform spinning, with the process parameters: total draft multiple 36.5 times, back zone draft 1.25 times, spinning twist 135 turns / 10 cm; Perform winding, with the winding speed of 1300 m / min; Perform doubling and twisting, with the spindle speed of 9000 rpm, S twist to obtain a yarn with a linear density of 19.3 tex; The above processes are all carried out in an environment with a temperature of 23 ± 2 °C and a humidity of 60 ± 5%; The mass ratio of polyester, vinylon, and cotton fiber is 60:20:20; The polyester includes 20% polyester air-jet textured yarn and 80% polyester fiber;

[0082] Chitosan: molecular weight about 600,000, deacetylation degree about 85%, sourced from Sinopharm Chemical Reagent Co., Ltd.;

[0083] The initiator is ammonium persulfate; The emulsifier is a non-ionic surfactant AE09 of fatty alcohol polyoxyethylene ether type;

[0084] The chitosan solution is prepared by the following process: Mix chitosan and 2v% glacial acetic acid solution, heat to 62 °C, and stir until completely dissolved; cool to 25 °C, add sodium periodate, and react for 2.5 h in the dark; add absolute ethanol to terminate the reaction, dialyze, and vacuum dry to obtain aldehyde-functionalized chitosan; the mass ratio of chitosan to sodium periodate is 10:7; the ratio of chitosan to glacial acetic acid solution is 2 g / 100 mL. Mix the aldehyde-functionalized chitosan and 2v% glacial acetic acid, and stir to swell for 2 h; add nitric acid, phosphoric acid, and sodium nitrate, and stir and react for 2.5 h at 38 °C in the dark; add absolute ethanol to terminate the reaction, let stand, filter, wash the precipitate, soak in acetone, filter, and vacuum dry to obtain carboxyl-functionalized chitosan; the ratio of aldehyde-functionalized chitosan to glacial acetic acid is 2 g / 100 mL; the ratio of aldehyde-functionalized chitosan to nitric acid, phosphoric acid, and sodium nitrate is 10 g:22 mL:15.5 mL:0.52 g; the concentration of nitric acid is 96 wt%, and the concentration of phosphoric acid is 85 wt%. Mix the carboxyl-functionalized chitosan and deionized water, heat to 65 °C, and stir until dissolved to obtain the chitosan solution;

[0085] The dosage of the catalyst p-toluenesulfonic acid is 0.2% of the total mass of the methylated amino resin and diol; the inhibitor p-methoxyphenol, and its dosage is 0.3% of the mass of hydroxyacrylate;

[0086] Before impregnation, the yarn is placed in impregnation liquid A at 95 °C, impregnated for 30 min, and the bath ratio is 1:15; dehydrated and dried; impregnation liquid A includes the following mass components: 3.5 g / L vinyl ethylene oxide and 0.3 g / L emulsifier.

[0087] Example 1: A processing process for a high-strength air-jet textured yarn work uniform fabric, including the following process:

[0088] S1. Mix the methylated amino resin, ethylene glycol, and the catalyst p-toluenesulfonic acid, stir and heat to 80 °C, and react for 120 min under a vacuum negative pressure of 800 mbar; carry out vacuum distillation to obtain hydroxy melamine resin; the molar ratio of methylated amino resin to ethylene glycol is 1:6.3;

[0089] Mix bis(tris(hydroxymethyl)propane) bisphosphoryl chloride and hydroxy melamine resin in N,N-dimethylformamide, heat to 150 °C, and reflux for 60 min; add N-(hydroxymethyl)acrylamide and the inhibitor p-methoxyphenol, and continue to react for 60 min; filter, wash, and vacuum dry to obtain phosphoric acid acrylate; the mass ratio of hydroxy melamine resin, bis(tris(hydroxymethyl)propane) bisphosphoryl chloride, and N-(hydroxymethyl)acrylamide is 10:18.3:4.9;

[0090] Immerse the yarn in the impregnating solution. The impregnation process is as follows: Place the yarn in impregnating solution A at 90°C for 20 minutes with a bath ratio of 1:10; dehydrate and dry. Impregnating solution A includes 2 g / L vinyl epoxyethane and 0.2 g / L emulsifier.

[0091] Then place it in impregnating solution B at 60°C for 30 minutes, dip and roll twice, with a liquor pickup rate of 60% and a bath ratio of 1:10. Impregnating solution B includes: 20 g / L acrylate emulsion, 10 g / L polyether block modified amino silicone oil, and the pH is 5.0. The acrylate emulsion is obtained by mixing vinyl monomers, emulsifier, and deionized water, followed by shear emulsification and then adding initiator. The acrylate emulsion includes: 10 g / L vinyl monomers, 1 g / L emulsifier, 0.2 g / L initiator. The vinyl monomers include 25 parts of diacrylate, 15 parts of dimethacrylate, 6 parts of reactive acrylate, 1 part of vinyl-terminated polydimethylsiloxane, and 4.7 parts of phosphoric acid acrylate. The diacrylate is 1,6-hexanediol diacrylate; the dimethacrylate is triethylene glycol dimethacrylate; the reactive acrylate is N-(hydroxymethyl)acrylamide.

[0092] Dry and cure. The process conditions are: pre-dry at 80°C for 3 minutes and then cure at 160°C for 2.5 minutes; wash with water and dry until the moisture content of the yarn is 10% to obtain the modified yarn.

[0093] S2. Weave to form a grey fabric; the weave is plain weave, and the areal density is 193 g / m 2 ; the warp density is 284.7 ends / 10 cm; the weft density is 197.5 picks / 10 cm.

[0094] S3. Post-treatment. The post-treatment process is as follows: Place the grey fabric in a chitosan solution and immerse it at 60°C for 30 minutes; dip and roll twice, with a liquor pickup rate of 60% and a bath ratio of 1:10. The concentration of the chitosan solution is 5 g / L and the pH is 4.8; dry and shape. The process conditions for drying and shaping are: bake at 100°C for 5 minutes; dry at 60°C for 2 hours to obtain the fabric for combat uniforms.

[0095] Example 2: A processing process for a high-strength air-jet textured yarn fabric for combat uniforms, including the following processes:

[0096] S1. Mix methylated amino resin, 1,3-butanediol, and the catalyst p-toluenesulfonic acid, stir and heat to 85°C, and react under a vacuum negative pressure of 800 mbar for 150 minutes; carry out vacuum distillation to obtain hydroxy melamine resin. The molar ratio of methylated amino resin to 1,3-butanediol is 1:6.4.

[0097] Mix bis(trimethylolpropane) bisphosphoryl chloride and hydroxymelamine resin in N,N-dimethylformamide, heat up to 152 °C, and reflux for 70 min; add 4-hydroxybutyl acrylate and inhibitor p-hydroxyanisole, and continue to react for 75 min; filter, wash, and dry in vacuum to obtain phosphoric acid acrylate; the mass ratio of hydroxymelamine resin, bis(trimethylolpropane) bisphosphoryl chloride, and 4-hydroxybutyl acrylate is 10:24.8:9.9;

[0098] Immerse the yarn in the impregnating solution, and the impregnating process is as follows: place the yarn in impregnating solution A at 95 °C for 30 min, with a bath ratio of 1:15; dehydrate and dry; impregnating solution A includes 3.5 g / L vinyl epoxyethane and 0.3 g / L emulsifier;

[0099] Then place it in impregnating solution B at 70 °C for 40 min, dip and roll twice, with a liquor pickup rate of 75%, and a bath ratio of 1:30; impregnating solution B includes: 40 g / L acrylate emulsion, 20 g / L polyether block modified amino silicone oil, and the pH is 4.5; the acrylate emulsion is obtained by mixing vinyl monomers, emulsifier, and deionized water, followed by shear emulsification and then adding initiator; the acrylate emulsion includes: 35 g / L vinyl monomers, 3 g / L emulsifier, 0.3 g / L initiator; the vinyl monomers include 28 parts of diacrylate, 18 parts of dimethacrylate, 8 parts of reactive acrylate, 1.5 parts of vinyl-terminated polydimethylsiloxane, and 5.4 parts of phosphoric acid acrylate; the diacrylate is 1,3-adamantanediol diacrylate; the dimethacrylate is pentaerythritol dimethacrylate; the reactive acrylate is 4-hydroxybutyl acrylate;

[0100] Dry and cure, and the process conditions are: pre-dry at 90 °C for 4 min, and bake at 168 °C for 2.7 min; wash with water and dry until the moisture content of the yarn is 15% to obtain the modified yarn;

[0101] S2. Weave to form a grey fabric; the weave is plain weave, and the areal density is 201 g / m 2 ; the warp density is 283.9 ends / 10 cm; the weft density is 196.7 picks / 10 cm;

[0102] S3. Post-treatment, and the post-treatment process is as follows: place the grey fabric in the chitosan solution and immerse it at 70 °C for 60 min; dip and roll twice, with a liquor pickup rate of 70%, and a bath ratio of 1:20; the concentration of the chitosan solution is 6 g / L, and the pH is 4.5; dry and shape, and the process conditions for drying and shaping are: bake at 110 °C for 8 min; dry at 70 °C for 2.5 h; obtain the training uniform fabric.

[0103] Example 3: A processing process for a high-strength air-jet textured yarn training uniform fabric, including the following processes:

[0104] S1. Mix methylated amino resin, cyclooctane-1,5-diol and the catalyst p-toluenesulfonic acid, stir and heat to 90 °C, and react for 180 min under a vacuum negative pressure of 800 mbar; carry out vacuum distillation to obtain hydroxy melamine resin; the molar ratio of methylated amino resin to cyclooctane-1,5-diol is 1:6.6;

[0105] Mix bis(tris(hydroxymethyl)propane) bisphosphoryl chloride and hydroxy melamine resin in N,N-dimethylformamide, heat up to 155 °C, and reflux for 80 min; add hydroxy acrylate and the inhibitor p-methoxyphenol, and continue to react for 90 min; filter, wash, and dry under vacuum to obtain phosphoric acid acrylate; the mass ratio of hydroxy melamine resin, bis(tris(hydroxymethyl)propane) bisphosphoryl chloride, and 2,4-dihydroxycinnamic acid is 10:31.3:14.9;

[0106] Immerse the yarn in the impregnating solution. The impregnation process is as follows: place the yarn in impregnating solution A at 100 °C for 40 min, with a bath ratio of 1:20; dehydrate and dry; impregnating solution A includes 5 g / L vinyl ethylene oxide and 0.5 g / L emulsifier;

[0107] Then place it in impregnating solution B at 80 °C for 50 min, dip two times and roll two times, with a liquor pickup rate of 90%, and a bath ratio of 1:50; impregnating solution B includes: 60 g / L acrylate emulsion, 30 g / L polyether block modified amino silicone oil, and the pH is 4.2; the acrylate emulsion is obtained by mixing vinyl monomers, emulsifier, and deionized water, followed by shear emulsification and then adding initiator; the acrylate emulsion includes: 60 g / L vinyl monomers, 6 g / L emulsifier, 0.5 g / L initiator; the vinyl monomers include 30 parts of diacrylate, 20 parts of dimethacrylate, 10 parts of reactive acrylate, 2 parts of vinyl-terminated polydimethylsiloxane, and 6.2 parts of phosphoric acid acrylate; the diacrylate is cyclohexanedimethanol diacrylate; the dimethacrylate is pentaethylene glycol dimethacrylate; the reactive acrylate is hydroxy 2,4-dihydroxycinnamic acid;

[0108] Dry and cure. The process conditions are as follows: pre-dry at 100 °C for 5 min, and then bake at 175 °C for 3.0 min; wash with water and dry until the moisture content of the yarn is 20% to obtain the modified yarn;

[0109] S2. Weave to form a grey fabric; the weave is plain weave, and the areal density is 208 g / m 2 ; the warp density is 283.2 ends / 10 cm; the weft density is 196.1 picks / 10 cm;

[0110] S3. Post-treatment. The post-treatment process is as follows: Place the blank fabric in a chitosan solution, impregnate it at 80 °C for 90 min; dip and roll twice, with a liquor pickup rate of 80% and a bath ratio of 1:30; the concentration of the chitosan solution is 7 g / L and the pH is 4.2; dry and shape. The process conditions for drying and shaping are as follows: Bake at 120 °C for 10 min; dry at 80 °C for 3 h; obtain the training uniform fabric.

[0111] Comparative Example 1: A processing process for a high-strength texturized silk training uniform fabric, including the following processes:

[0112] Steps S1 - S2 are the same as those in Example 1;

[0113] In S3, the chitosan solution is not treated, and the training uniform fabric is obtained.

[0114] Comparative Example 2: A processing process for a high-strength texturized silk training uniform fabric, including the following processes:

[0115] Steps S1 - S2 are the same as those in Example 1; Weave to obtain the training uniform fabric.

[0116] Comparative Example 3: A processing process for a high-strength texturized silk training uniform fabric, including the following processes:

[0117] In S1, impregnation with vinyl ethylene oxide impregnating liquid is not carried out;

[0118] Mix methylated amino resin, N-(hydroxymethyl)acrylamide, inhibitor p-hydroxyanisole, and catalyst p-toluenesulfonic acid, stir and heat to 80 °C, react for 120 min under a vacuum negative pressure of 800 mbar; carry out vacuum distillation to obtain melamine acrylate; the molar ratio of methylated amino resin to N-(hydroxymethyl)acrylamide is 1:6.3; Replace 4.7 parts of phosphoric acid acrylate in the acrylate emulsion with 3.3 parts of melamine acrylate;

[0119] The other processes of steps S2 and S1 are the same as those in Comparative Example 2, and the training uniform fabric is obtained.

[0120] Comparative Example 4: A processing process for a high-strength texturized silk training uniform fabric, including the following processes:

[0121] In S1, the vinyl monomers include 25 parts of diacrylate, 15 parts of dimethacrylate, 6 parts of reactive acrylate, and 1 part of vinyl-terminated polydimethylsiloxane;

[0122] The other processes of steps S2 and S1 are the same as those in Comparative Example 2, and the training uniform fabric is obtained.

[0123] Comparative Example 5: A processing process for a high-strength texturized silk training uniform fabric, including the following processes:

[0124] Take the yarn for spinning to obtain the training uniform fabric; the weave is plain weave, and the areal density is 186 g / m 2 ; the warp density is 290.7 ends / 10 cm; the weft density is 208.1 ends / 10 cm.

[0125] Comparative Example 6: A processing technology for a high-strength texturized yarn training uniform fabric, including the following processes:

[0126] Polyester air-jet textured yarn is not provided in the polyester fiber; the obtained yarn is spun to obtain the training uniform fabric; the weave is plain weave, and the areal density is 178 g / m 2 ; the warp density is 295.3 ends / 10 cm; the weft density is 212.9 ends / 10 cm.

[0127] Experiment: Take the training uniform fabrics obtained in Examples 1-3 and Comparative Examples 1-6, place them in an environment of 25°C and 65% RH for 72 h to balance, prepare specimens, and detect and record the test results of their properties (warp direction):

[0128] Mechanical property test: Referring to GB / T 3923.1 as the reference standard, use a universal testing machine to detect the tensile properties of the specimens, and the tensile rate is 100 mm / min;

[0129] Flame retardant property test: Referring to GB / T 5454 as the reference standard, use a limiting oxygen index instrument to detect the limiting oxygen index of the specimens;

[0130] Moisture absorption and air permeability test; Referring to GB / T 21655.1 as the reference standard, detect the air permeability and moisture permeability of the specimens, and the experimental conditions are a temperature of 38°C and a relative humidity of 90%;

[0131] Dry and wet friction property test: Use a friction and wear tester, with the pig's abdominal skin as the lower friction pair and the specimen as the upper friction pair. Through spherical reciprocating motion, detect the friction coefficients of the specimens in the dry state and the wet state (smear 50 μL of artificial sweat and replenish 50 μL every 5 min), the friction load is 5 N, the reciprocating displacement is 20 mm, the sliding speed is 20 mm / s, the reciprocating number is 100 times, and the experimental environment is 20°C and 50% RH;

[0132] Abrasion resistance: Referring to GB / T 21196 as the reference standard, use a fabric flat grinding instrument to detect the abrasion resistance of the specimens, and the load is 595 g;

[0133] Wash resistance test: Wash the specimens 10 times and then detect the properties of the specimens again; the conditions for one wash are: water temperature 27°C, bath ratio 1:30, washing time 1 min, dehydration and drying.

[0134] Table 1,

[0135]

[0136] Table 2

[0137] Abrasion resistance (flat grinding times) Breaking strength (after washing) Coefficient of friction (dry state) Coefficient of friction (wet state) Example 1 2100 1687 0.21 0.18 Example 2 2300 1677 0.20 0.18 Example 3 2230 1648 0.18 0.16 Comparative Example 1 2300 1616 0.24 0.21 Comparative Example 2 1950 1584 0.29 0.25 Comparative Example 3 1670 1526 0.40 0.33 Comparative Example 4 1240 1471 0.47 0.36 Comparative Example 5 1200 1428 0.55 0.40 Comparative Example 6 1080 1457 0.60 0.42

[0138] Based on the data in the above table, the following conclusions can be clearly obtained:

[0139] The combat uniform fabrics obtained in Examples 1 - 3 are compared with the combat uniform fabrics obtained in Comparative Examples 1 - 6. From the test results,

[0140] Compared with the comparative examples, the combat uniform fabrics obtained in Examples 1 - 3 have higher breaking strength, tearing strength, oxygen index, number of flat abrasion resistance, breaking strength data after washing, and lower dry and wet friction coefficients, and have good air permeability and moisture permeability. This fully demonstrates that the present invention has achieved the improvement of fabric strength, wear resistance, flame retardancy and comfort, and maintains good air permeability and sweat wicking ability.

[0141] Compared with Example 1, the chitosan solution in the post - treatment process of Comparative Example 1 was not treated; Comparative Example 2 did not undergo post - treatment and its drying and shaping process. Chitosan has good smoothness, hydrophilicity and flame retardant ability, and its cross - linked products have better strength. When the post - treatment process changes, the strength data of the fabric decreases, and the data changes of wear resistance, dry and wet friction performance and limiting oxygen index are more obvious.

[0142] Based on Comparative Example 2, in Comparative Example 3, the impregnation with vinyl ethylene oxide impregnating solution was not carried out, and the phosphoric acid acrylate in the acrylate emulsion was replaced with melamine acrylate; in Comparative Example 4, the impregnation with vinyl ethylene oxide impregnating solution was not carried out, and the phosphoric acid acrylate in the acrylate emulsion was deleted; in Comparative Example 5, the yarns and fabrics did not undergo processes such as impregnation and post - treatment. The phosphoric acid acrylate in the vinyl monomer has good smoothness and flame retardant ability, and the connection between its copolymer product and the fiber is tight. When the impregnation process changes, the strength of the fabric will decrease, and the wear resistance, wash resistance, dry and wet friction and other properties will also change significantly.

[0143] Compared with Comparative Example 5, in Comparative Example 6, the preparation process of the yarn and the fabric structure are different. The air - textured yarn has good fluffiness and fiber - holding force, which effectively improves the strength, moisture permeability and sweat wicking ability of the fabric and its resistance to friction and wear.

[0144] In summary, the process of the fabric and the setting of its used components in the present invention can promote the comprehensive improvement of its strength, wear resistance, flame retardancy, comfort and air permeability and sweat wicking ability.

[0145] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes that fall within the meaning and scope of the equivalent elements of the claims within the present invention.

Claims

1. A processing technology for high-strength air-changing yarn training uniform fabric, characterized by: Including the following processes: The yarns are sequentially immersed in an impregnation solution containing phosphate acrylate, and then taken out and dried and solidified to form modified yarns loaded with phosphate acrylate; preparing grey cloth; The grey cloth is post-processed, dried and shaped to form a hydrophilic layer to obtain the training uniform fabric.

2. The processing technology of the high-strength air-changing yarn training uniform fabric according to claim 1 is characterized by: The phosphate acrylate is prepared by the following process: The methyl etherified amino resin, diol and catalyst are mixed, stirred and heated to 80-90° C., and reacted for 120-180 minutes under vacuum negative pressure to obtain a hydroxy melamine resin; Mix di(trimethylolpropane)bisphosphoryl chloride and hydroxy melamine resin in N,N-dimethylformamide, heat to 150-155°C, and reflux for 60-80 minutes; add hydroxy acrylate and polymerization inhibitor, and continue to react for 60-90 minutes to obtain phosphate acrylate.

3. The processing technology of the high-strength air-changing yarn training uniform fabric according to claim 1 is characterized by: The impregnation solution containing phosphate acrylate comprises the following mass components: 20-60 g / L acrylate emulsion, 0-30 g / L polyether block modified amino silicone oil, pH 4.2-5.0; The acrylic emulsion is obtained by mixing olefin monomer, emulsifier and deionized water, and then adding initiator after shear emulsification; the acrylic emulsion includes the following mass components: 10-60g / L olefin monomer, 1-6g / L emulsifier and 0.2-0.5g / L initiator.

4. The processing technology of the high-strength air-changing yarn training uniform fabric according to claim 3 is characterized by: The ethylenic monomer comprises 25 to 30 parts of diacrylate, 15 to 20 parts of dimethacrylate, 6 to 10 parts of reactive acrylate, 1 to 2 parts of vinyl-terminated polydimethylsiloxane, and 4.7 to 18.6 parts of phosphoric acid acrylate.

5. The processing technology of the high-strength air-changing yarn training uniform fabric according to claim 1 is characterized by: The impregnation process is as follows: placing the yarn in a vinyl ethylene oxide impregnation solution, impregnating for 20 to 40 minutes at a temperature of 90 to 100° C., with a bath ratio of 1:(10 to 20); dehydrating and drying; Then, the product is placed in an impregnation solution containing phosphate acrylate, immersed at a temperature of 60-80°C for 30-50 minutes, double-immersion and double-rolling, with a rolling rate of 60%-90% and a bath ratio of 1:(10-50).

6. The processing technology of the high-strength air-changing yarn training uniform fabric according to claim 5 is characterized by: The vinyl ethylene oxide impregnation solution comprises the following components by mass: 2-5 g / L vinyl ethylene oxide and 0.2-0.5 g / L emulsifier.

7. The processing technology of the high-strength air-changing yarn training uniform fabric according to claim 1 is characterized by: The post-treatment process is as follows: placing the blank in a chitosan solution, dipping at a temperature of 60-80°C for 30-90 minutes; double dipping and double rolling, with a rolling liquid rate of 60%-80% and a bath ratio of 1:(10-30).

8. The processing technology of the high-strength air-changing yarn training uniform fabric according to claim 7 is characterized by: The chitosan solution is prepared by the following process: Mix chitosan and glacial acetic acid solution, heat to 60-65°C, and stir until completely dissolved; cool to 20-30°C, add sodium periodate, and react in the dark for 2-3 hours to obtain aldehyded chitosan; Mix aldehyde-modified chitosan and glacial acetic acid, stir and swell for 2 hours; add nitric acid, phosphoric acid and sodium nitrate, stir and react at 35-40°C in the dark for 2-3 hours to obtain carboxylated chitosan; add deionized water, heat to 60-70°C, stir and dissolve to obtain chitosan solution.

9. The processing technology of the high-strength air-changing yarn training uniform fabric according to claim 1 is characterized by: The yarn comprises polyester, vinylon and cotton fiber, and the mass ratio of the polyester, vinylon and cotton fiber is (60-70):(15-25):(15-25); the polyester comprises 20%-30% polyester hollow yarn and 70%-80% polyester fiber.

10. A high-strength air-changing yarn training uniform fabric made according to the processing technology described in any one of claims 1 to 9.

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