Preparation method and application of wear-resistant composite fabric

Abstract

The invention discloses a preparation method and application of a wear-resistant composite fabric, and the preparation method of the wear-resistant composite fabric comprises the following steps: yarn making and drawing, sizing dyeing and weaving; wherein the raw materials of the first modified fibers comprise modified polylactic acid fibers, polyester fibers and cotton fibers in the yarn making and drawing process; the raw materials of the second modified fibers comprise one or more of polyester fibers, spandex fibers, cotton fibers and polyamide fibers; the raw materials of the third modified fibers comprise one or more of polyester fibers, spandex fibers, cotton fibers and polyamide fibers. The wear-resistant composite fabric is used for improving the wear resistance of the fabric and prolonging the service life; meanwhile, the fabric has an antibacterial effect and is closer to the skin of a human body; in addition, the wear-resistant composite fabric is mainly applied to jean fabrics in the market.

Description

Technical Field

[0001] The invention relates to the technical field of composite fabrics, and in particular to a preparation method and application of a wear-resistant composite fabric. Background Art

[0002] Since its introduction in 1873, denim fabric has evolved from basic use to fashion trend. It is deeply loved by people for its rough surface style, wear resistance and personality. After three centuries of development and evolution, people's enthusiasm and demand for denim clothing have not diminished. my country is one of the world's major denim clothing producers and consumers, and the denim clothing industry occupies an important position in my country's national economy.

[0003] With the improvement of people's living standards and the introduction of the concept of low-carbon green environmental protection in the textile industry, people's consumption concept of denim products has changed accordingly. From the initial durable wear to the current demand for comfortable, casual and multifunctional clothing, denim product manufacturers have also put forward higher requirements for the production and weaving of denim fabrics, hoping to obtain yarns and fabrics with better performance, as well as energy-saving and environmentally friendly production processes. Although the current denim fabrics have a certain wear resistance, they are not good in terms of antibacterial properties and skin contact. It is necessary to provide a fabric that can increase the touch while improving its wear resistance. Summary of the invention

[0004] The present application provides a preparation method and application of a wear-resistant composite fabric, wherein the wear-resistant composite fabric is used to increase the wear resistance of the fabric and increase its service life; at the same time, it has an antibacterial effect and is closer to human skin.

[0005] The present application provides a method for preparing a wear-resistant composite fabric, which is characterized by comprising the following steps: yarn making and drawing: drawing a plurality of first modified fibers with different twisting degrees to obtain a first spun yarn; drawing a plurality of second modified fibers with different twisting degrees to obtain a second spun yarn; drawing a plurality of third modified fibers with different twisting degrees to obtain a third spun yarn; sizing and dyeing: sizing and dyeing the first spun yarn, the second spun yarn, and the third spun yarn; weaving: using the first spun yarn as a warp yarn to weave into a first fabric; The second spun yarn is used as the warp yarn to weave the second fabric: the third spun yarn sews the first fabric and the second fabric together to obtain a double-layer wear-resistant fabric, and desizing and enzyme washing the double-layer wear-resistant fabric; the wear-resistant composite fabric is obtained; the raw materials of the first modified fiber include modified polylactic acid fiber, polyester fiber and cotton fiber; the raw materials of the second modified fiber include one or more of polyester fiber, spandex fiber, cotton fiber and nylon fiber; the raw materials of the third modified fiber include one or more of polyester fiber, spandex fiber, cotton fiber and nylon fiber.

[0006] By adopting the above technical scheme, the wear-resistant composite fabric in the present application is compounded with a double-layer fabric structure, and can greatly improve the wear resistance while being more suitable for contact with the skin and reducing the discomfort to the skin. The first fabric is close to the skin of the wearer, and the first spun yarn for weaving the first fabric is woven by modified polylactic acid fiber, polyester fiber and cotton fiber. The yarn drawing between the modified polylactic acid fiber, polyester fiber and cotton fiber can greatly improve its wear resistance and reduce the discomfort caused by denim skin to the skin. The second fabric is woven with the second spun yarn, wherein the material of the second spun yarn is used as the material of denim cloth, and then used as the modification of the outer side of the fabric to improve the texture of the denim. The third spun yarn not only has the texture of denim cloth, but also can increase the stability of the mutual sewing of the first fabric and the second fabric through its toughness.

[0007] Preferably, the synthesis steps of the modified polylactic acid fiber include: polymerization blending: adding triacetin, tributyl citrate, polyethylene glycol, gluconolactone and glycerol to polylactic acid slices for heating and blending to obtain a mixed polymer; toughening blending: reheating the mixed polymer and adding a TiO 2 The modified oligomer is prepared to obtain modified polylactic acid; blend spinning: PHA (polyhydroxystearic acid) is added to the modified polylactic acid, and blend spinning is performed by an electrostatic spinning method to obtain modified polylactic acid fibers.

[0008] Preferably, in the polymerization and blending process, the polylactic acid chips include one of left-rotational polylactic acid (PLLA), right-rotational polylactic acid (PDLA), and racemic polylactic acid (PDLLA).

[0009] By adopting the above technical solution, there are currently three types of polylactic acid slices. Experimental measurements show that in PLLA / PDLA blended fibers, the crystallization rate of the spun fibers is higher during the coagulation process, and the tensile strength of the fibers increases with the increase in the stretch ratio and the molecular weight of the polymer. When the viscosity-average molecular weight drops to a certain level during the spinning process, the tensile strength of the fibers can reach a certain level.

[0010] Preferably, during the polymerization and blending process, the polylactic acid chips have a pre-crystallization temperature of 60-100° C., a pre-crystallization time of 1-3 hours, a drying temperature of 85-95° C., and a drying time of 20-40 hours.

[0011] By adopting the above technical solution, the moisture content of the slices can be controlled below 50ppm through parameter control, thereby achieving higher toughness and increasing wear resistance.

[0012] Optionally, during the toughening blending process, the 2 The modified oligomer is TiO modified with polylactic acid oligomer 2 ; or TiO2 coated with polycaprolactone 2 .

[0013] By adopting the above technical scheme, the polylactic acid / titanium dioxide composite material is used as a multifunctional material due to its excellent mechanical, thermal, photocatalytic and antibacterial properties by adding oligomer-modified TiO2 into the polylactic acid before blending and spinning. 2 It can make the spinning more uniform, thereby improving the toughness; as a further preferred embodiment, the TiO 2 Originally, the porous nanofiber scaffold with high ability to simulate the natural environment was used for animal wound healing by electrospinning. In this application, polycaprolactone can improve the mechanical properties of the fiber by reacting with polylactic acid, and combined with nano-scale TiO 2 , further improving the toughness before mixed spinning.

[0014] Optionally, in the co-spinning process, one or more of acetone and chloroform are used as solvent.

[0015] By adopting the above technical scheme, in the electrospinning preparation method, acetone, chloroform, chloroform and a mixture of acetone and chloroform are used to improve the uniformity of the material during spinning. Moreover, since a softer solvent is required to load nanofibers of different thicknesses, and according to tests, it is found that as the spinning time increases, the diameter of the modified polylactic acid fiber will become shorter and even reach 500nm, and the toughness of the composite fiber can also be improved.

[0016] Preferably, in the fabric finishing step, the treatment temperature in the desizing treatment is 40°C-70°C, and the desizing enzyme concentration is 6g / L-15g / L; the treatment liquid of the enzyme washing treatment contains 1g / L-2g / L cellulase and 0.2g / L-0.4g / L citric acid.

[0017] On the other hand, the present application discloses an application of a wear-resistant composite fabric. The wear-resistant composite fabric prepared by the preparation method of the wear-resistant composite fabric is suitable for denim clothing.

[0018] In the wear-resistant composite fabric of the present application, modified polylactic acid fiber is used in the first spinning yarn, which is not only conducive to fitting the human skin, but also helps the degradation of clothing; and can also greatly increase the wear resistance, making denim clothes more durable.

[0019] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0020] 1. The wear-resistant composite fabric in the present application is composited with a double-layer fabric structure, in which the first fabric is close to the wearer's skin and is woven together by modified polylactic acid fiber, polyester fiber and cotton fiber, which can greatly improve its wear resistance and reduce the discomfort caused by denim leather to the skin.

[0021] 2. This application adopts polylactic acid / titanium dioxide composite material as a multifunctional material, and adds oligomer-modified TiO 2 It can make spinning more uniform and thus improve the toughness.

[0022] 3. In the electrospinning method for preparing polylactic acid, the present application uses acetone, chloroform, chloroform and a mixture of acetone and chloroform, which can improve the uniformity of the material during spinning and thus improve the toughness of the composite fiber. DETAILED DESCRIPTION

[0023] The present application provides a method for preparing a wear-resistant composite fabric, which is used to increase the wear resistance of the fabric and increase its service life; at the same time, it has an antibacterial effect and is closer to human skin.

[0024] The technical solutions in the embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or server comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or modules that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] raw material

[0027] Polyester fiber: (in my country, more than 85% of polyethylene terephthalate is polyester fiber) This application is a commercially available polyester fiber;

[0028] Cotton fiber: (natural polymer compound, the raw material is cotton processed by modern technology) structural formula (C6H10O5)n; this application is commercially available cotton fiber;

[0029] Spandex fiber: This application is a commercially available polyurethane fiber;

[0030] Nylon fiber: This application is commercially available nylon fiber

[0031] Polylactic acid chips: CAS No. 26100-51-6 Molecular formula (C 3 H 6 O 3 )x purity: 95-98%; In the embodiments of the present application, PLLA (levorotatory polylactic acid), PDLA (dextrorotatory polylactic acid), and PDLLA (racemic polylactic acid) are used;

[0032] Triacetin: CAS No. 102-76-1, molecular weight 218.204, purity: 98.0-99.0%;

[0033] Tributyl citrate: CAS No. 77-94-1, molecular weight 360.45, purity: 98.0-99.0%;

[0034] Polyethylene glycol: CAS No. 25322-68-3, molecular weight 104.15, purity: 98.0-99.0%;

[0035] Gluconolactone: CAS No. 90-80-2 Molecular weight 178.14 Purity: 98.0-99.0%;

[0036] Glycerol: CAS No. 56-81-5, molecular weight 92.094, purity: 98.0-99.0%;

[0037] Titanium dioxide: CAS No. 13463-67-7 Molecular weight 79.87 Purity: 99.0-99.5%;

[0038] Polyhydroxystearic acid: CAS No. 58128-22-6 Molecular weight 310.35 Purity: 98.0-99.0%;

[0039] Polycaprolactone: CAS No. 24980-41-4 Molecular weight 114.14 Purity: 98.0-99.0% Acetone: CAS No. 37-64-1 Molecular weight 58.079 Purity: 99.0-99.5%

[0040] Chloroform: CAS No. 67-66-3 Molecular weight 119.38 Purity: 99.0-99.5%

[0041] Raw material example

[0042] The synthesis steps of modified polylactic acid fiber include:

[0043] S1, polymerization blending: adding triacetin, tributyl citrate, polyethylene glycol, gluconolactone and glycerol to polylactic acid slices in proportion, heating in a reaction kettle, and blending at a temperature of 200-300° C. to obtain a mixed polymer;

[0044] S2, toughening blending: reheat the mixed polymer to 200-300°C and add TiO 2 Modified oligomers are prepared to obtain modified polylactic acid;

[0045] S3. Co-spinning: PHA (polyhydroxystearic acid) is added to the modified polylactic acid, and co-spinning is performed by electrostatic spinning to obtain modified polylactic acid fibers.

[0046] Example

[0047] Example 1

[0048] Yarn making and drawing: three 30Ttex modified polylactic acid fibers, two 35Ttex polyester fibers, and five 30Ttex cotton fibers are drawn to obtain a first spinning yarn; five 30Ttex spandex fibers and five 35Ttex polyester fibers are drawn to obtain a second spinning yarn; five 30Ttex spandex fibers and five 35Ttex polyester fibers are drawn to obtain a third spinning yarn;

[0049] Sizing and dyeing: sizing and dyeing the first spun yarn, the second spun yarn and the third spun yarn;

[0050] Weaving: The first spun yarn is used as the warp yarn to weave the first fabric; the second spun yarn is used as the warp yarn to weave the second fabric. Fabric finishing: The third spun yarn sews the first fabric and the second fabric together to obtain a double-layer wear-resistant fabric, and the double-layer wear-resistant fabric is desized and enzyme-washed; the desizing temperature is 50°C, and the desizing enzyme concentration is 10g / L; the enzyme washing treatment liquid contains 1.5g / L cellulase and 0.3g / L citric acid; finally, a wear-resistant composite fabric is obtained.

[0051] During the modification process of the modified polylactic acid fiber in Example 1, TiO 2 The modified oligomer is TiO2 coated with polycaprolactone 2 . And the polylactic acid slices are made of left-handed polylactic acid (PLLA).

[0052] Embodiment 2-9

[0053] The difference between Example 2-9 and Example 1 is that the raw material components of the first modified fiber, the second modified fiber and the third modified fiber are different. The specific parameters are shown in Table 1.

[0054] Table 1. Fiber raw material composition table of Examples 1-9

[0055]

[0056]

[0057] Comparative Example

[0058] Comparative Example 1

[0059] The difference of Comparative Example 1 is that the raw materials of the first modified fiber are polyester fiber and cotton fiber.

[0060] Comparative Example 2

[0061] The difference of Comparative Example 2 is that the raw materials of the first modified fiber are polylactic acid fiber, polyester fiber and cotton fiber, and the polylactic acid fiber is a commercially available finished polylactic acid fiber.

[0062] Performance testing

[0063] In order to further study the performance parameters of the wear-resistant composite fabric, the present application further carries out the following example verification.

[0064] 1. Fabric wear resistance

[0065] The experiment uses the flat friction method to determine the resistance of the composite fabric after zero washing and a certain number of washings. The characterization index is the friction mass loss. The greater the mass loss rate, the better the wear resistance of the fabric. The wear resistance of each tissue was tested at 300, 800, and 1200 revolutions, and the mass loss percentage was calculated.

[0066] 2. Fabric bursting performance

[0067] Bursting refers to the phenomenon that a part of a fabric is damaged by an external force perpendicular to the plane of the fabric. The higher the bursting strength, the better the bursting performance of the fabric. This experiment uses a spherical ejector to measure the bursting performance of denim fabric after zero washing and multiple washings. The bursting strength of each fabric after different washing times is tested.

[0068] 3. Fabric mechanical properties

[0069] Fabric stretchability refers to the phenomenon that a fabric will break when it is subjected to a certain tensile load. Therefore, the experiment selected the constant force elongation (constant load 25N) test method to conduct mechanical tensile tests on the composite fabrics after different washing times.

[0070] 4. Antibacterial performance test: According to the modified AATCC 100-1999 standard test method, the composite fabric was tested for antibacterial properties. The inoculated bacteria were Staphylococcus aureus (ATCC 6538) and Escherichia coli (ATCC 43895). The sterilization rate was calculated by counting the number of surviving bacteria. The concentration of Staphylococcus aureus in this test was 1.50×106CFU, and the concentration of Escherichia coli in this test was 3.76×106CFU.

[0071] Table 2. Performance test table of Examples 1-9 and Comparative Examples 1-2

[0072]

[0073]

[0074] Conclusion Analysis

[0075] According to the above tests, the main damage during wearing and household use is the wear caused by the fabric being subjected to different forms and sizes of friction. After the wear occurs, the fabric fibers will break, fall off, and be pulled out and disintegrated. The part of the fabric that is rubbed will have mass loss, and the loss rate of mass loss can be used to judge the fabric damage. This application analyzes the wear resistance of the fabric after washing 0 times, 20 times, and 40 times. In addition, the bursting force, breaking force, and elongation at break of the composite fabric are on a downward trend as the number of washings increases. This is because the more times the fabric is washed, the more the fabric is subjected to repeated mechanical external forces during the washing process, and after multiple cycles of continuous washing, drying, friction, and ironing, the mechanical properties of the fabric gradually decrease, and the fluff on the surface of the fabric decreases and becomes thinner, resulting in a decrease in the bursting force and mechanical properties of the fabric. Since polyester fiber and cotton fiber are added to the first spun yarn and the second spun yarn, both of which have good elastic recovery, a certain elasticity is still maintained after multiple washings, thereby enabling better mechanical properties to be maintained.

[0076] From the analysis of Examples 1-9, Example 5 is the optimal example, wherein the raw materials of the first spun yarn are modified polylactic acid fiber, polyester fiber, and cotton fiber; the raw materials of the second spun yarn are spandex fiber and cotton fiber; and the raw materials of the third spun yarn are spandex fiber and polyester fiber.

[0077] In addition, in combination with Comparative Examples 1-2, when polyester fiber is not added to the first fabric, the wear resistance and various mechanical properties thereof are reduced, which is due to the superior mechanical properties of polylactic acid. However, the performance improvement is not high, which is because the polylactic acid has not been modified, and further research is needed.

[0078] In addition, titanium dioxide modified with polylactic acid oligomers is added to the modified polylactic acid fiber during the modification process. Since titanium metal plays a specific role in skin morphogenesis and function, titanium ions as exogenous ions will destroy the ecological balance of bacteria, but have little effect on human skin, thereby increasing the antibacterial effect while reducing damage to human skin.

[0079] Example 10

[0080] The difference between Example 10 and Example 5 is that TiO 2 The modified oligomer is TiO modified with polylactic acid oligomer 2 .

[0081] The difference between Example 11 and Example 5 is that the polylactic acid slices used are dextrorotatory polylactic acid (PDLA).

[0082] The difference between Example 12 and Example 5 is that the polylactic acid slices used are racemic polylactic acid (PDLLA).

[0083] Performance testing

[0084] In order to further study the performance parameters of the wear-resistant composite fabric, the present application further carried out the above experiment to verify the embodiment. Specific data can be seen in the following test table.

[0085] Table 3. Performance test table of Examples 5, 10-12

[0086]

[0087] Conclusion Analysis

[0088] According to the above test analysis, Example 12 is the best example, in which when the modified polylactic acid fiber is in its modification process, TiO 2 The modified oligomer is TiO2 coated with polycaprolactone 2 . And the polylactic acid slices are made of racemic polylactic acid (PDLLA).

[0089] In addition, in the present application, during the blending spinning process of the modified polylactic acid, a mixture of acetone and chloroform is used, which can further improve the uniformity of the material during spinning and increase the spinning time, which can further improve the toughness of the composite fiber.

[0090] Application Examples

[0091] The present application also discloses an application of a wear-resistant composite fabric. The wear-resistant composite fabric prepared by the preparation method of the wear-resistant composite fabric is suitable for denim clothing.

[0092] Currently, denim clothing is classified into tops, bottoms, and one-pieces. Tops include denim jackets, denim shirts, denim jackets, denim vests, denim suit jackets, denim windbreakers, denim sweatshirts, etc.; bottoms include jeans, denim skirts, denim long skirts, denim long skirts, etc.; one-pieces include denim dresses, denim overalls, denim overalls, etc.

[0093] As a preferred embodiment, the composite fabric in the present application is more suitable for clothing that fits the human skin, such as denim shirts, jeans, denim skirts, denim long skirts, and denim long skirts. Since friction and pulling of elbows, knees, buttocks, and other parts are inevitable in daily activities when wearing denim clothing, sitting, squatting, and exercising, the composite fabric can achieve the wear resistance of denim clothing, and can also improve the antibacterial effect of denim clothing, reducing the damage caused by clothing to the skin.

[0094] It should be noted that the above-mentioned sequence of the embodiments of the present application is only for description and does not represent the advantages and disadvantages of the embodiments. And the above-mentioned specific embodiments of this specification are described. Other embodiments are within the scope of the attached claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0095] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

[0096] This specification is merely an exemplary description of the present application and is deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalents, the present application is intended to include these modifications and variations.

Claims

1. A method for preparing a wear-resistant composite fabric, characterized in that: The following steps are involved: Yarn making and drawing: a plurality of first modified fibers with different twisting degrees are subjected to drawing to obtain a first spun yarn; a plurality of second modified fibers with different twisting degrees are subjected to drawing to obtain a second spun yarn; a plurality of third modified fibers with different twisting degrees are subjected to drawing to obtain a third spun yarn; Sizing and dyeing: sizing and dyeing the first spun yarn, the second spun yarn, and the third spun yarn; Weaving: The first spun yarn is used as the warp yarn to weave into the first fabric; the second spun yarn is used as the warp yarn to weave into the second fabric Fabric finishing: the third spun yarn sews the first fabric and the second fabric together to obtain a double-layer wear-resistant fabric, and performs desizing treatment and enzyme washing treatment on the double-layer wear-resistant fabric to obtain a wear-resistant composite fabric; The raw materials of the first modified fiber include modified polylactic acid fiber, polyester fiber and cotton fiber; the raw materials of the second modified fiber include one or more of polyester fiber, spandex fiber, cotton fiber and nylon fiber; the raw materials of the third modified fiber include one or more of polyester fiber, spandex fiber, cotton fiber and nylon fiber.

2. The method for preparing a wear-resistant composite fabric according to claim 1, characterized in that: The synthesis steps of the modified polylactic acid fiber include: Polymerization and blending: adding triacetin, tributyl citrate, polyethylene glycol, gluconolactone and glycerol to polylactic acid slices, heating and blending, and obtaining a mixed polymer; Toughening blending: reheating the mixed polymer and adding a modified oligomer having TiO2 to obtain modified polylactic acid; Co-blending spinning: PHA (polyhydroxystearic acid) is added to the modified polylactic acid, and co-blending spinning is performed by an electrostatic spinning method to obtain modified polylactic acid fibers.

3. The method for preparing a wear-resistant composite fabric according to claim 2, characterized in that: In the polymerization and blending process, the polylactic acid slices include one of left-rotational polylactic acid (PLLA), right-rotational polylactic acid (PDLA), and racemic polylactic acid (PDLLA).

4. The method for preparing a wear-resistant composite fabric according to claim 2, characterized in that: During the polymerization and blending process, the polylactic acid chips have a pre-crystallization temperature of 60-100° C., a pre-crystallization time of 1-3 hours, a drying temperature of 85-95° C., and a drying time of 20-40 hours.

5. The method for preparing a wear-resistant composite fabric according to claim 2, characterized in that: In the toughening blending process, the modified oligomer with TiO2 is TiO2 modified by a polylactic acid oligomer; or TiO2 with a surface coated with polycaprolactone.

6. The method for preparing a wear-resistant composite fabric according to claim 1, characterized in that: In the co-spinning process, one or more of acetone and chloroform is used as the solvent.

7. The method for preparing a wear-resistant composite fabric according to claim 1, characterized in that: In the fabric finishing step, the desizing treatment temperature is 40°C-70°C, and the desizing enzyme concentration is 6g / L-15g / L; the treatment solution of the enzyme washing treatment contains 1g / L-2g / L cellulase and 0.2g / L-0.4g / L citric acid.

8. An application of the wear-resistant composite fabric according to any one of claims 1 to 7, characterized in that: The wear-resistant composite fabric prepared by the preparation method of the wear-resistant composite fabric is suitable for denim clothing.

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