High-stability multi-layer composite wrinkled fabric and preparation method thereof

Abstract

The invention discloses a high-stability multi-layer composite wrinkled fabric and a preparation method thereof, belongs to the technical field of garment fabrics, and aims to solve the technical problems of infirm dyeing and poor stability of the wrinkled fabric in the prior art. In addition, how to improve the antibacterial property and the mechanical property of the wrinkled fabric is the technical problem to be solved urgently. The pleated fabric comprises a pleated fabric and an antibacterial fabric, the pleated fabric and the antibacterial fabric are connected through silver-plated connecting fibers, polyester fibers are subjected to a first-stage stretching-dyeing-second-stage stretching process to obtain firmly-dyed modified polyester filaments, the modified polyester filaments are doped with memory shape alloy fibers, and the pleated fabric is obtained through a pleating process. The prepared wrinkled fabric has the advantages of being high in temperature-resistant stability, deformation resistance and mechanical property, and the skin-friendly performance and the antibacterial performance of the wrinkled fabric are improved by compounding the wrinkled fabric with the antibacterial cotton gray fabric.

Description

Technical Field

[0001] The invention relates to the technical field of clothing fabrics, in particular to a highly stable multi-layer composite wrinkled fabric and a preparation method thereof. Background Art

[0002] As an important element of the overall shape and detail design of clothing, pleats are a form of expression of clothing shape and a design technique to achieve fabric recycling art and decorative art. Pleated fabrics have a unique position in fabric development because of their rich layering, significant texture characteristics and unique visual effects. Currently, most of the pleated fabrics on the market are made by machine pleating. Machine pleating has the characteristics of high pleating efficiency, good effect and large output. However, after dyeing, pleated fabrics have technical problems such as weak dyeing, poor temperature stability and poor deformation resistance.

[0003] Patent application CN114232175A discloses a preparation process of a pleated fabric, wherein the pleated fabric comprises a soft surface layer and a shaping layer, wherein the shaping layer is made of TPU yarn material and has good molding ability when being heated and wrinkled, and the shaping layer provides a holding force for the folded pleated portion, and the edges of the pleated portions formed on the pleated fabric present a Z-shaped structure symmetrically arranged with each other, thereby improving the deformation resistance of the pleated fabric and hindering its restoration to flatness, thereby further improving its own stability; however, the setting of the pleats can only maintain the shaping structure on both sides, but cannot provide physical support for the continuous and regular pleated structure of the fabric. In addition, how to maintain the color fastness of the pleated fabric is still a technical problem that needs to be solved urgently.

[0004] Patent application CN115874464A discloses a two-color fabric with irregular wrinkles and a preparation process thereof. The preparation process of the two-color fabric with irregular wrinkles includes selecting a polyester fiber fabric for dyeing, and then performing cloth discharging, printing transfer, and calendering processes to prepare a two-color fabric with irregular wrinkles. In the dyeing process, the fabric is allowed to accumulate in the dye vat as much as possible to form wrinkles, and then the hot water in the vat is directly discharged after the pressure in the vat is relieved by a high-temperature drainage method, and then cold water is quickly injected to increase the wrinkle effect of the fabric surface by thermal expansion and contraction. However, the above-mentioned production process only increases the wrinkle effect of the fabric surface, and how to improve the dyeing fastness of the fabric, and improve the deformation resistance and temperature stability of the wrinkled fabric are still technical problems that need to be solved urgently.

[0005] In view of the technical defects in this aspect, a solution is now proposed. Summary of the invention

[0006] The object of the present invention is to provide a highly stable multi-layer composite wrinkled fabric and a preparation method thereof, so as to solve the technical problems in the prior art of fabric wrinkle making and dyeing, such as poor deformation resistance, poor temperature stability and low dyeing fastness.

[0007] The object of the present invention can be achieved by the following technical scheme: a method for preparing a highly stable multi-layer composite pleated fabric, comprising a pleated fabric and an antibacterial fabric, wherein the pleated fabric and the antibacterial fabric are connected by a silver-plated connecting fiber;

[0008] The method for preparing the wrinkled fabric comprises the following steps:

[0009] S1. The polyester fiber is subjected to primary stretching to obtain primary stretched yarn; the primary stretching temperature is 70-80°C, and the stretching ratio is 3.5-4.0;

[0010] S2, mixing and dyeing the primary stretched yarn with the dye solution, wherein the dyeing temperature of the primary stretched yarn is 120-130° C. and the dyeing time is 40-50 min, and then filtering and vacuum drying the primary stretched yarn at 40-50° C. to constant weight to obtain a modified fiber;

[0011] S3, the modified fiber is subjected to secondary stretching to obtain secondary stretched yarn; the stretching temperature of the secondary stretched yarn is 200-210°C, and the stretching multiple is 1.1-1.2; the secondary stretched yarn is subjected to post-processing to obtain modified polyester filament;

[0012] The polyester fiber is sequentially subjected to primary stretching, secondary stretching and relaxation heat setting processes to prepare modified polyester filaments. A dyeing process is inserted between the primary stretching process and the secondary stretching process to pre-dye the primary stretched filaments to prepare dyed modified polyester filaments.

[0013] S4, shape memory alloy fiber as weft yarn, modified polyester filament as warp yarn, weaving on a small weaving prototype machine, the warp yarn and the weft yarn are interwoven at 35-60°C to form a biaxial oblique woven fabric, that is, a polyester fabric doped with memory alloy;

[0014] S5. The polyester fabric doped with the memory alloy is bonded to a heat shrinkable film, and is heated and shrunk to form a wrinkled texture on the surface; then, the fabric is separated from the heat shrinkable film, and is subjected to a stentering shaping and a washing process to obtain a wrinkled fabric.

[0015] Shape memory alloy fibers are used as the weft yarns of the fabric, and modified polyester filaments are used as the warp yarns of the fabric. The warp yarns and the weft yarns are interwoven obliquely to prepare polyester fabric doped with shape memory alloys. The polyester fabric doped with shape memory alloys is pleated by a heating shrinkage process to obtain a pleated fabric.

[0016] Further, in step S2, the dye solution is prepared by the following steps;

[0017] 5-10 g of alizarin, 1.5-3 g of dispersant styrylphenol polyoxyethylene ether and 50 mL of deionized water are mixed evenly, and high-speed sheared in an emulsifying disperser to obtain a dye solution; wherein the high-speed shearing speed is 1000 r / min, and the high-speed shearing time is 30-60 min.

[0018] Styrylphenol polyoxyethylene ether is used as a nonionic dispersant to reduce the particle size of alizarin and disperse dyes, improve its own dispersion efficiency, and prepare a dye solution.

[0019] Furthermore, in step S3, the post-process treatment is to perform relaxation heat setting on the secondary drawn yarn, and the relaxation rate of the relaxation heat setting is 5% and the setting temperature is 200-210°C.

[0020] Furthermore, the method for preparing the shape memory alloy fiber comprises the following steps:

[0021] A1. Cut a Cu-Zn-Al alloy ingot into small pieces, wherein Cu is 70%wt, Zn is 25%wt, and Al is 5%wt, and then put it into a glass tube with a diameter of 4 mm. Heat the glass tube with an acetylene flame until the Cu-Zn-Al alloy ingot is melted, and then draw the alloy together with the glass shell into a wire to obtain an alloy fiber with a diameter of 0.2 mm.

[0022] The Cu-Zn-Al alloy ingot is drawn into ultrafine alloy fibers of a certain diameter.

[0023] A2. Heat the vacuum annealing furnace to 550°C, then place the alloy fiber in the vacuum annealing furnace and keep it warm for 5 minutes, and then quench it in water to prepare the memory shape alloy fiber.

[0024] Furthermore, in step S4, the warp yarn density is 55-65 yarns / cm, and the weft yarn density is 35-45 yarns / cm.

[0025] The shape memory alloy fiber is used as the weft yarn of the fabric, and the polyester fabric doped with the shape memory alloy is prepared by adjusting the appropriate density of the warp and weft yarns.

[0026] Furthermore, in step S5, the temperature of heating and shrinking is 100-140° C., and the duration of heating and shrinking is 1-2 minutes.

[0027] Further, in step S1, the antibacterial fabric is prepared by the following steps;

[0028] Octadecyldimethyl[3-(trimethoxysilyl)propyl]ammonium chloride and deionized water are mixed evenly to obtain a quaternary ammonium salt solution; cotton grey cloth and the quaternary ammonium salt solution are mixed evenly to make a bath ratio of 1:15-20; the cotton grey cloth is soaked at 40-50° C. for 1-2 hours to obtain a finished grey cloth; the finished grey cloth is vacuum dried at 40-50° C. to a constant weight to obtain an antibacterial fabric.

[0029] Furthermore, the usage ratio of octadecyldimethyl[3-(trimethoxysilyl)propyl]ammonium chloride and deionized water is 5-10 g:100 mL.

[0030] As another aspect of the present invention, a method for preparing a highly stable multi-layer composite pleated fabric comprises the following steps:

[0031] B1. Apply glue on one side of the wrinkled fabric to obtain a glue layer. The amount of glue applied is 5-10g / m 2 ;

[0032] B2. Bond the antibacterial fabric and the adhesive layer, and then transfer them to a hot press machine for hot pressing and shaping to obtain a highly stable multi-layer composite pleated fabric; wherein the hot pressing temperature is 80-90°C, the hot pressing pressure is 2-5MPa, and the hot pressing time is 1-2min.

[0033] The present invention has the following beneficial effects:

[0034] 1. Cu-Zn-Al alloy ingots are melted and drawn to produce ultrafine alloy fibers; the alloy fibers are annealed and quenched to be in a martensitic state and have shape memory effect; shape memory alloy fibers utilize their own shape memory effect, superelasticity and high damping properties to have temperature stability and deformation resistance. The prepared wrinkled fabric is doped with a certain amount of shape memory alloy fibers to fix the shape of the alloy at room temperature. When the fabric temperature rises or is subjected to external force, it will automatically return to its original shape, thereby improving the temperature stability and deformation resistance of the wrinkled fabric; in addition, shape memory alloy fibers have excellent mechanical properties. Polyester fiber itself has the advantages of good strength, good wear resistance and thermoplasticity; shape memory alloy fibers and modified polyester filaments are used as warp and weft yarns, and the prepared fabrics can meet the requirements of machine pleating.

[0035] 2. In order to improve the fastness of the coloring of the wrinkled fabric, the present invention selects to dope the dyeing process in the primary stretching process and the secondary stretching process; alizarin is used as a natural dye, and after adding a dispersant, a dye solution with uniform particle distribution and good dispersibility is obtained; alizarin is used as a natural dye, and under weakly acidic conditions, the natural dye is adsorbed on the primary stretching yarn through hydrogen bonds and van der Waals forces. In the primary stretching process, the polyester fiber adopts a low-temperature high-multiple stretching process to form a high-orientation, low-crystalline structure; when the crystallinity of the polyester fiber is low, the gaps between molecules on the primary stretching yarn that can accommodate dye molecules become more, so that the dyeing effect is better. The modified fiber is stretched by the secondary stretching to produce a large amount of orientation-induced crystallization to obtain a secondary stretching yarn; the secondary stretching yarn is then subjected to a relaxation heat setting process to effectively fix the above-mentioned orientation-induced crystallization. The secondary stretching process improves the crystallinity and orientation of the modified polyester filament, and can further fix the dye in the molecular gap to improve the stability of the dye.

[0036] 3. The colored polyester filaments are mixed with memory shape alloy fibers to obtain fabrics; after the fabrics are processed to form pleated textures, the thickness, width and spacing between the pleats are fixed, and the shape memory alloy provides thermal stability and thermoplasticity to maintain the pleats. In addition, in the pleated fabrics prepared in the present invention, the warp yarns and weft yarns are interwoven at 30, 45 and 60°C to form a biaxial bias woven fabric; the bias fabric can overcome the disadvantage of insufficient bias strength and has the advantage of light weight.

[0037] 4. The skin affinity of shape memory alloy fiber is poor. The present invention uses cotton grey cloth as a soft inner layer; there are many pores inside the cotton fiber, and the air can stay between the fibers to form a static air layer, thereby achieving a heat preservation effect. Cotton fiber has a unique hollow structure, excellent wear resistance and moisture absorption properties, and its main component cellulose molecules contain hydroxyl groups with high chemical reaction activity, so the surface of the cotton fiber is very easy to be modified. Cotton fabric is modified with octadecyl dimethyl [3- (trimethoxysilyl) propyl] ammonium chloride to improve its antibacterial properties. Octadecyl dimethyl [3- (trimethoxysilyl) propyl] ammonium chloride has a wide bactericidal spectrum; it shows excellent antibacterial effects on Gram-positive bacteria, Gram-negative bacteria, molds, yeasts, and algae; octadecyl dimethyl [3- (trimethoxysilyl) propyl] ammonium chloride is used in cotton fabric finishing, and has excellent antibacterial properties against Staphylococcus aureus, Escherichia coli, and Candida albicans. The antibacterial fabric and the pleated fabric are then connected by silver-plated connecting fibers to obtain a composite fabric. Since the quaternary ammonium salt on the antibacterial fabric can react with the phenolic hydroxyl group in the pleated fabric dye liquid alizarin to undergo an acid-base neutralization reaction, the bonding performance between the two layers of fabric is further improved, and the stability of the prepared multi-layer composite pleated fabric is further improved. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Example 1

[0040] This embodiment provides a method for preparing a pleated fabric for a highly stable multi-layer composite pleated fabric, comprising the following steps:

[0041] 1. Preparation of shape memory alloy fibers

[0042] 1. A Cu-Zn-Al alloy ingot is used, wherein Cu is 70%wt, Zn is 25%wt, and Al is 5%wt. A section of the Cu-Zn-Al alloy ingot is cut into small pieces, and the pieces are placed in a glass tube with a diameter of 4 mm. The glass tube is heated with an acetylene flame until the Cu-Zn-Al alloy ingot is melted, and the alloy is drawn into a wire together with the glass shell to obtain an alloy fiber with a diameter of 0.2 mm.

[0043] 2. The vacuum annealing furnace is heated to 550°C, and then the alloy fiber is placed in the vacuum annealing furnace for 5 minutes, and then quenched in water to prepare the shape memory alloy fiber.

[0044] 2. Preparation of wrinkled fabrics

[0045] 1. The polyester fiber is subjected to primary stretching to obtain a primary stretching yarn; the primary stretching speed is 500 m / min, the stretching temperature is 70°C, and the stretching multiple is 3.5;

[0046] 2. Weigh 5 g of alizarin powder and add it to a 150 mL beaker. Then add 1.5 g of dispersant styrylphenol polyoxyethylene ether and 50 mL of deionized water to the beaker. Perform high-speed shearing in an emulsifying disperser at a speed of 1000 r / min and a high-speed shearing time of 30 min to obtain a dye solution.

[0047] 3. The dye solution and the primary stretched yarn are mixed and dyed, the dye liquor ratio is 10:1, the dyeing temperature is 120° C., the dyeing time is 40 min, and then filtered and the primary stretched yarn is vacuum dried at 40° C. to constant weight to obtain modified fibers.

[0048] 4. The modified fiber is subjected to secondary stretching to obtain secondary stretched yarn; the stretching speed of the secondary stretching is 200 m / min, the temperature of the secondary stretching is 200° C., and the stretching multiple of the secondary stretching is 1.1; the secondary stretched yarn is subjected to relaxation heat setting, the setting relaxation rate is 5%, and the setting temperature is 140° C. to obtain modified polyester filament.

[0049] 3. Preparation of polyester fabric doped with memory alloy

[0050] Shape memory alloy fibers with a diameter of 0.2 mm were used as weft yarns and modified polyester filaments were used as warp yarns. The weft yarns were woven on a small prototype machine. The warp yarns and the weft yarns were interwoven at an angle of 30° to form a biaxial oblique woven fabric. The warp yarn density was 55 yarns / cm and the weft yarn density was 35 yarns / cm.

[0051] 4. Preparation of pleated fabrics

[0052] The polyester fabric doped with memory alloy is bonded to a heat shrinkable film and heated and shrunk. The heating and shrinking temperature is 100°C and the heating and shrinking time is 1 minute. After the heat shrinking treatment, a wrinkled texture is formed on the surface of the composite fabric to obtain the heat-shrunk fabric. The heat-shrunk fabric is separated from the heat shrinkable film, and after being treated with a stretching, shaping and washing process, a wrinkled fabric is obtained.

[0053] Example 2

[0054] This embodiment provides a method for preparing a pleated fabric for a highly stable multi-layer composite pleated fabric, comprising the following steps:

[0055] 1. Preparation of shape memory alloy fibers

[0056] 1. A Cu-Zn-Al alloy ingot is used, wherein Cu is 70%wt, Zn is 25%wt, and Al is 5%wt. A section of the Cu-Zn-Al alloy ingot is cut into small pieces, and the pieces are placed in a glass tube with a diameter of 4 mm. The glass tube is heated with an acetylene flame until the Cu-Zn-Al alloy ingot is melted, and the alloy is drawn into a wire together with the glass shell to obtain an alloy fiber with a diameter of 0.3 mm.

[0057] 2. The vacuum annealing furnace is heated to 550°C, the alloy fiber is then placed in the vacuum annealing furnace for 8 minutes, and then quenched in water to prepare the shape memory alloy fiber.

[0058] 2. Preparation of wrinkled fabrics

[0059] 1. The polyester fiber is subjected to primary stretching to obtain a primary stretching yarn; the primary stretching speed is 500 m / min, the stretching temperature is 70°C, and the stretching multiple is 3.5;

[0060] 2. Weigh 5 g of alizarin powder and add it to a 150 mL beaker. Then add 1.5 g of dispersant styrylphenol polyoxyethylene ether and 50 mL of deionized water to the beaker. Perform high-speed shearing in an emulsifying disperser at a speed of 1000 r / min and a high-speed shearing time of 30 min to obtain a dye solution.

[0061] 3. The dye solution and the primary stretched yarn are mixed and dyed, the dye liquor ratio is 15:1, the dyeing temperature is 125° C., the dyeing time is 45 min, and then filtered and the primary stretched yarn is vacuum dried at 45° C. to constant weight to obtain modified fibers.

[0062] 4. The modified fiber is subjected to secondary stretching to obtain secondary stretched yarn; the stretching speed of the secondary stretching is 200 m / min, the temperature of the secondary stretching is 205° C., and the stretching multiple of the secondary stretching is 1.1; the secondary stretched yarn is subjected to relaxation heat setting, the setting relaxation rate is 5%, and the setting temperature is 150° C. to obtain modified polyester filament.

[0063] 3. Preparation of polyester fabric doped with memory alloy

[0064] Shape memory alloy fibers with a diameter of 0.2 mm were used as weft yarns and modified polyester filaments were used as warp yarns. The weft yarns were woven on a small prototype machine. The warp yarns and weft yarns were interwoven at an angle of 45° to form a biaxial oblique woven fabric. The warp yarn density was 60 yarns / cm and the weft yarn density was 40 yarns / cm.

[0065] 4. Preparation of pleated fabrics

[0066] The polyester fabric doped with memory alloy is bonded to the heat shrink film and heated and shrunk. The temperature of the heat shrinkage is 120℃ and the duration of the heat shrinkage is 2 minutes. After the heat shrinkage treatment, a wrinkled texture is formed on the surface of the composite fabric to obtain the heat-shrunk fabric. The heat-shrunk fabric is separated from the heat shrink film and treated with a tentering setting and washing process to obtain a wrinkled fabric.

[0067] Example 3

[0068] This embodiment provides a method for preparing a pleated fabric for a highly stable multi-layer composite pleated fabric, comprising the following steps:

[0069] 1. Preparation of shape memory alloy fibers

[0070] 1. A Cu-Zn-Al alloy ingot is used, wherein Cu is 70%wt, Zn is 25%wt, and Al is 5%wt. A section of the Cu-Zn-Al alloy ingot is cut into small pieces, and the pieces are placed in a glass tube with a diameter of 4 mm. The glass tube is heated with an acetylene flame until the Cu-Zn-Al alloy ingot is melted, and the alloy is drawn into a wire together with the glass shell to obtain an alloy fiber with a diameter of 0.3 mm.

[0071] 2. The vacuum annealing furnace is heated to 550°C, and then the alloy fiber is placed in the vacuum annealing furnace for 5-10 minutes, and then quenched in water to prepare the shape memory alloy fiber.

[0072] 2. Preparation of wrinkled fabrics

[0073] 1. The polyester fiber is subjected to primary stretching to obtain a primary stretched yarn; the primary stretching speed is 500 m / min, the stretching temperature is 80°C, and the stretching multiple is 4.0.

[0074] 2. Weigh 10 g of alizarin powder and add it to a 150 mL beaker. Then add 3 g of dispersant styrylphenol polyoxyethylene ether and 50 mL of deionized water to the beaker. Perform high-speed shearing in an emulsifying disperser at a speed of 1000 r / min and a high-speed shearing time of 60 min to obtain a dye solution.

[0075] 3. The dye solution and the primary stretched yarn are mixed and dyed, the dye liquor ratio is 20:1, the dyeing temperature is 130° C., the dyeing time is 50 min, and then filtered and the primary stretched yarn is vacuum dried at 50° C. to constant weight to obtain modified fibers.

[0076] 4. The modified fiber is subjected to secondary stretching to obtain secondary stretched yarn; the stretching speed of the secondary stretching is 200 m / min, the temperature of the secondary stretching is 210° C., and the stretching multiple of the secondary stretching is 1.1; the secondary stretched yarn is subjected to relaxation heat setting, the setting relaxation rate is 5%, and the setting temperature is 160° C. to obtain modified polyester filament.

[0077] 3. Preparation of polyester fabric doped with memory alloy

[0078] Shape memory alloy fibers with a diameter of 0.2 mm were used as weft yarns and modified polyester filaments were used as warp yarns. The weft yarns were woven on a small prototype machine. The warp yarns and the weft yarns were interwoven at an angle of 60° to form a biaxial oblique woven fabric. The warp yarn density was 65 yarns / cm and the weft yarn density was 45 yarns / cm.

[0079] 4. Preparation of pleated fabrics

[0080] The polyester fabric doped with memory alloy is bonded to the heat shrink film and heated and shrunk. The temperature of the heat shrinkage is 140℃ and the duration of the heat shrinkage is 2 minutes. After the heat shrinkage treatment, a wrinkled texture is formed on the surface of the composite fabric to obtain the heat-shrunk fabric. The heat-shrunk fabric is separated from the heat shrink film and treated with a tentering setting and water washing process to obtain a wrinkled fabric.

[0081] Example 4

[0082] This embodiment provides a method for preparing a highly stable multi-layer composite wrinkled fabric, comprising the following steps:

[0083] 1. Mix 5 g of octadecyldimethyl[3-(trimethoxysilyl)propyl]ammonium chloride and 100 mL of deionized water to obtain a quaternary ammonium salt solution; add 10 g of cotton grey cloth into a 150 mL beaker, add the quaternary ammonium salt solution to make the bath ratio 1:15, and then transfer the beaker to a water bath and soak it at 40 ° C for 1 hour to obtain the finished cotton grey cloth; vacuum dry the finished cotton grey cloth at 40 ° C to constant weight to obtain an antibacterial fabric.

[0084] 2. Apply glue to one side of the wrinkled fabric prepared in Example 1 to obtain a glue layer. The amount of glue applied is 5 g / m 2 The antibacterial fabric and the adhesive layer are laminated and then transferred to a hot press for hot pressing and shaping to obtain a highly stable multi-layer composite pleated fabric; wherein the hot pressing temperature is 80°C, the hot pressing pressure is 2MPa, and the hot pressing time is 1min.

[0085] Example 5

[0086] This embodiment provides a method for preparing a highly stable multi-layer composite wrinkled fabric, comprising the following steps:

[0087] 1. Mix 6g of octadecyldimethyl[3-(trimethoxysilyl)propyl]ammonium chloride and 100mL of deionized water to obtain a quaternary ammonium salt solution. Add 10g of cotton grey cloth to a 150mL beaker, add a certain amount of quaternary ammonium salt solution to make the bath ratio 1:18; then transfer the beaker to a water bath and soak at 45°C for 1h to obtain the finished cotton grey cloth. The finished cotton grey cloth is vacuum dried at 44°C to constant weight to obtain an antibacterial fabric.

[0088] 2. Apply glue to one side of the wrinkled fabric prepared in Example 2 to obtain a glue layer. The amount of glue applied is 8 g / m 2 The antibacterial fabric and the adhesive layer are laminated and then transferred to a hot press for hot pressing and shaping to obtain a highly stable multi-layer composite pleated fabric; wherein the hot pressing temperature is 85°C, the hot pressing pressure is 3MPa, and the hot pressing time is 2min.

[0089] Example 6

[0090] This embodiment provides a method for preparing a highly stable multi-layer composite wrinkled fabric, comprising the following steps:

[0091] 1. Mix 10g of octadecyldimethyl[3-(trimethoxysilyl)propyl]ammonium chloride and 100mL of deionized water to obtain a quaternary ammonium salt solution. Add 10g of cotton grey cloth to a 150mL beaker, add a certain amount of quaternary ammonium salt solution to make the bath ratio 1:20; then transfer the beaker to a water bath and soak at 50°C for 1h to obtain the finished cotton grey cloth. The finished cotton grey cloth is vacuum dried at 50°C to constant weight to obtain an antibacterial fabric.

[0092] 2. Apply glue to one side of the wrinkled fabric prepared in Example 3 to obtain a glue layer. The amount of glue applied is 10 g / m 2 The antibacterial fabric and the adhesive layer are laminated and then transferred to a hot press for hot pressing and shaping to obtain a highly stable multi-layer composite pleated fabric; wherein the hot pressing temperature is 90°C, the hot pressing pressure is 5MPa, and the hot pressing time is 2min.

[0093] Comparative Example 1

[0094] The difference between this comparative example and Example 6 is that when preparing the pleated fabric, modified polyester filaments are used as warp yarns and weft yarns, and shape memory alloys are not used.

[0095] Comparative Example 2

[0096] The difference between this comparative example and Example 6 is that, when preparing the wrinkled fabric, the dyeing process is eliminated between the primary stretching process and the secondary stretching process.

[0097] Comparative Example 3

[0098] The difference between this comparative example and Example 6 is that the cotton grey fabric is not subjected to antibacterial treatment and is directly used as the fabric to be composited with the wrinkled fabric.

[0099] Performance Test:

[0100] 1. The highly stable multi-layer composite wrinkled fabrics prepared in Examples 4-6 and Comparative Examples 1-3 were cut into strips with a length of 10 cm and a width of 1 cm; a strength meter was used to test the tensile breaking strength of the strips prepared in Examples 4-6 and Comparative Examples 1-3, wherein the tensile rate was 100 mm / min.

[0101] 2. According to GB / T8427-2008 “Textiles - Tests for Colour Fastness - Colour Fastness to Washing”, the colour fastness to washing of the highly stable multi-layer composite wrinkled fabrics prepared in Examples 4-6 and Comparative Examples 1-3 was tested.

[0102] 3. According to GB / T20944.3-2008 "Evaluation of antibacterial properties of textiles Part 3: Oscillation method", the antibacterial properties of the highly stable multi-layer composite wrinkled fabrics prepared in Examples 4-6 and Comparative Examples 1-3 against Staphylococcus aureus and Candida albicans were tested. The specific test results are shown in Table 1:

[0103] Table 1- Sample performance test data table

[0104]

[0105] Data Analysis:

[0106] A comparative analysis of the data in Table 1 above shows that the highly stable multi-layer composite wrinkled fabrics prepared in Examples 4-6 of the present invention have high mechanical properties, wash resistance and antibacterial properties, specifically, the highly stable multi-layer composite wrinkled fabrics prepared in Examples 4-6 have high breaking strength values, high soap fastness grades, and high antibacterial rates against Staphylococcus aureus and Candida albicans.

[0107] However, in Comparative Example 1, the wrinkled fabric was prepared without doping with a shape memory alloy with strong mechanical properties and high stability, resulting in a decrease in the mechanical properties and poor stability of the prepared wrinkled fabric, which is manifested in a decrease in the breaking strength value and a decrease in the soap washing fastness grade.

[0108] In Comparative Example 2, no dyeing process was added to the primary stretching process and the secondary stretching process, but the breaking strength and soap fastness of the prepared multi-layer composite wrinkled fabric did not change significantly, indicating that the dye can be fixed during the dyeing process to improve the stability of the dye itself. In Comparative Example 3, the cotton grey fabric was not treated with antibacterial agents, and the antibacterial properties of the prepared composite fabric decreased significantly.

[0109] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0110] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0111] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A highly stable multi-layer composite pleated fabric, characterized in that: It includes a pleated fabric and an antibacterial fabric, wherein the pleated fabric and the antibacterial fabric are connected by a silver-plated connecting fiber; The method for preparing the wrinkled fabric comprises the following steps: S1. The polyester fiber is subjected to primary stretching to obtain primary stretched yarn; the primary stretching temperature is 70-80°C, and the stretching ratio is 3.5-4.0; S2, mixing and dyeing the primary stretched yarn with the dye solution, wherein the dyeing temperature of the primary stretched yarn is 120-130° C. and the dyeing time is 40-50 min, and then filtering and vacuum drying the primary stretched yarn at 40-50° C. to constant weight to obtain a modified fiber; S3, the modified fiber is subjected to secondary stretching to obtain secondary stretched yarn; the stretching temperature of the secondary stretched yarn is 200-210°C, and the stretching ratio is 1.1-1.2; The secondary drawn yarn is subjected to post-processing to obtain modified polyester filament; S4, shape memory alloy fiber as weft yarn, modified polyester filament as warp yarn, weaving on a small weaving prototype machine, the warp yarn and the weft yarn are interwoven at 35-60°C to form a biaxial oblique woven fabric, that is, a polyester fabric doped with memory alloy; S5. The polyester fabric doped with the memory alloy is bonded to a heat shrinkable film, and is heated and shrunk to form a wrinkled texture on the surface; then, the fabric is separated from the heat shrinkable film, and is subjected to a stentering shaping and a washing process to obtain a wrinkled fabric.

2. A highly stable multi-layer composite pleated fabric according to claim 1, characterized in that: In step S2, the dye solution is prepared by the following steps; 5-10 g of alizarin, 1.5-3 g of dispersant styrylphenol polyoxyethylene ether and 50 mL of deionized water are mixed evenly, and high-speed sheared in an emulsifying disperser to obtain a dye solution; wherein the high-speed shearing speed is 1000 r / min, and the high-speed shearing time is 30-60 min.

3. The highly stable multi-layer composite pleated fabric according to claim 1, characterized in that: In step S3, the post-process treatment is to perform relaxation heat setting on the secondary drawn yarn, wherein the relaxation rate of the relaxation heat setting is 5% and the setting temperature is 200-210°C.

4. The highly stable multi-layer composite pleated fabric according to claim 1, characterized in that: The preparation method of the shape memory alloy fiber, The steps include: A1. Cut a Cu-Zn-Al alloy ingot into small pieces, wherein Cu is 70%wt, Zn is 25%wt, and Al is 5%wt, and then put it into a glass tube with a diameter of 4 mm. Heat the glass tube with an acetylene flame until the Cu-Zn-Al alloy ingot is melted, and then draw the alloy together with the glass shell into a wire to obtain an alloy fiber with a diameter of 0.2 mm. A2. Heat the vacuum annealing furnace to 550°C, then place the alloy fiber in the vacuum annealing furnace and keep it warm for 5 minutes, and then quench it in water to prepare the memory shape alloy fiber.

5. The highly stable multi-layer composite pleated fabric according to claim 1, characterized in that: In step S4, the warp yarn density is 55-65 yarns / cm, and the weft yarn density is 35-45 yarns / cm.

6. The highly stable multi-layer composite pleated fabric according to claim 1, characterized in that: In step S5, the temperature of heating and shrinking is 100-140° C., and the duration of heating and shrinking is 1-2 minutes.

7. The highly stable multi-layer composite pleated fabric according to claim 1, characterized in that: The antibacterial fabric is prepared by the following steps: Octadecyldimethyl[3-(trimethoxysilyl)propyl]ammonium chloride and deionized water are mixed evenly to obtain a quaternary ammonium salt solution; cotton grey cloth and the quaternary ammonium salt solution are mixed evenly to make a bath ratio of 1:15-20; the cotton grey cloth is soaked at 40-50° C. for 1-2 hours to obtain a finished grey cloth; the finished grey cloth is vacuum dried at 40-50° C. to a constant weight to obtain an antibacterial fabric.

8. The highly stable multi-layer composite pleated fabric according to claim 7, characterized in that: The usage ratio of octadecyldimethyl[3-(trimethoxysilyl)propyl]ammonium chloride and deionized water is 5-10g:100mL.

9. A method for preparing a highly stable multi-layer composite wrinkled fabric according to any one of claims 1 to 8, characterized in that: The following steps are involved: B1. Apply glue on one side of the wrinkled fabric to obtain a glue layer. The amount of glue applied is 5-10g / m 2 ; B2. Bond the antibacterial fabric and the adhesive layer, and then transfer them to a hot press machine for hot pressing and shaping to obtain a highly stable multi-layer composite pleated fabric; wherein the hot pressing temperature is 80-90°C, the hot pressing pressure is 2-5MPa, and the hot pressing time is 1-2min.

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