A breathable and moisture-permeable composite fabric production process and equipment

Abstract

The present invention provides a breathable and moisture-permeable composite fabric production process, which adopts composite modified fabric production equipment to produce breathable and moisture-permeable composite fabrics, including the following steps: S1, surface fabric preparation; S2, inner fabric preparation; S3, fabric compounding, the surface fabric and the inner fabric are compounded by a polyurethane spraying compounding process to obtain the breathable and moisture-permeable composite fabric. The breathable and moisture-permeable composite fabric obtained by the breathable and moisture-permeable composite fabric production process of the present invention has the advantages of moisture permeability and quick drying, breathable and comfortable, moisturizing and skin care, anti-oxidation, etc., and is suitable for further promotion and use.

Description

Technical Field

[0001] The invention relates to the technical field of composite fabric production and preparation, and in particular to a method for preparing an air-permeable and moisture-permeable composite fabric. Background Art

[0002] Textile fibers can usually be divided into natural fibers and synthetic fibers. Natural fibers include cotton, linen, silk, wool, etc., and synthetic fibers include polyester, acrylic, polypropylene, and vinylon, etc. Although synthetic fibers have great advantages over natural fibers in terms of output and strength, they are far less comfortable to wear than natural fibers due to their poor hygroscopicity and breathability. In addition, due to the accelerated pace of work and increased pressure in life, people are eager to relax and have leisure time. Therefore, casual clothing has become the mainstream of clothing design in the domestic and foreign textile markets. The style of casual clothing requires ease and naturalness, comfort and beauty, and health care. The fabrics must have the characteristics of "light, soft, loose, and drape". Changes in fashion trends have promoted structural changes in textile fibers and clothing fabrics. At present, the development trends of clothing fibers and fabrics are mainly reflected in three aspects:

[0003] (1) The market share of cellulose and protein fibers continues to increase;

[0004] (2) Differentiated fibers with high moisture conductivity, moisture absorption, quick drying and other wearing comfort characteristics are developing rapidly;

[0005] (3) Clothing fabrics are made of multi-component blends to complement the advantages of different fibers.

[0006] In view of the current status of synthetic fibers, for example, acetalized polyvinyl alcohol fiber, i.e., vinylon, still has the disadvantage of poor dyeability, which causes vinylon to be mainly used in industrial products and is greatly restricted in terms of civilian products. In the modification process of vinylon, people began to explore the use of natural protein to transform the performance of vinylon based on the unique advantages of natural protein fibers, such as silk, such as good hygroscopicity, softness, luster, comfort, good dyeing, etc., so that it can be used more in civilian products. The patent number is CN 1492087A, which discloses a "collagen composite fiber and its preparation method", which is a protein extracted from animal hides or leather industry waste, after adding olefin monomer modifiers for grafting, mixed with polyvinyl alcohol and stirred evenly, to prepare a spinning solution with a certain concentration and viscosity, and then after wet spinning, coagulation, stretching and acetalization treatment, the collagen composite fiber used as a textile material can be obtained. The document with patent number 200510020902.2 discloses a "metal ion modified collagen-polyvinyl alcohol composite fiber and its preparation method". On the basis of collagen and polyvinyl alcohol, metal ions are used as chelating and cross-linking modifiers to prepare spinning solution, and a series of subsequent processes are carried out to prepare new collagen-polyvinyl alcohol composite fibers.

[0007] In order to expand the application scope of yarn, it is necessary to increase the collagen content of yarn or fabric to achieve the moisturizing and skin care effects of yarn or fabric. In view of this, we disclose a method for preparing a breathable and moisture-permeable composite fabric.

[0008] In addition, in the actual application process, the composite fabrics include sewing, gluing and other methods. Among them, the composite fabrics compounded by sewing have a good feel and will not affect the properties of the fabric itself. However, if the fabrics that need to be waterproof are prepared by this method, the waterproof effect will be destroyed. There is also a poor bonding effect at the non-sewing stitches between the fabrics, which affects their subsequent processing and use. The composite modified fabrics compounded by gluing have the advantages of high bonding degree and fast bonding speed. The polyurethane spraying composite process is one of the adhesive composites and is widely used. However, it also has certain problems in use. During the spraying interval of the existing polyurethane spraying equipment, the glue delivery pipeline is suspended by the valve, and the glue inside the nozzle is always in a heating state. During the polyurethane bonding process, temperature and maintenance time are important factors affecting the bonding strength. If the temperature is too high, The most significant impact is the reduction of the adhesion of polyurethane, mainly because when the temperature rises, the molecular distance in the polyurethane glue will increase, and the interaction force between molecules will weaken, thereby reducing the adhesion ability. At the same time, when the temperature rises, the volume of the polyurethane glue will expand, which will cause stress between the front and back of the adhesive section, affecting the bonding strength. The fabric has poor peeling resistance after compounding. Excessive temperature changes will also affect the curing speed of the polyurethane glue. The curing temperature and time used for maintenance of the same batch of fabrics are consistent, and the curing time and temperature of the polyurethane glue coating area with large temperature fluctuations are inevitably different from those of the polyurethane glue coating area with normal temperature, which will inevitably lead to poor bonding effect in this area. In addition, when the downtime is relatively long, the polyurethane glue exposed outside the nozzle is in contact with the air for a long time, which is easy to cause gelation, and it needs to be manually cleaned before continuing production;

[0009] In view of the above-mentioned defects of the production equipment and process when producing composite modified fabrics in the existing technology, it is necessary to further improve and optimize them. Summary of the invention

[0010] In view of the shortcomings of the prior art, the present invention aims to provide a process and equipment for producing breathable and breathable composite fabrics. The produced breathable and breathable composite fabrics have the advantages of quick drying, breathable and comfortable, moisturizing and skin care, and anti-oxidation, and are suitable for further promotion and use; it also solves the problem that the polyurethane glue heating time is long after the machine is stopped during the production of composite modified fabrics, resulting in excessively high temperature and affecting the composite effect, and the problem that gel occurs at the nozzle after long-term shutdown and needs to be manually cleaned before production can continue. .

[0011] To achieve the above object, the present invention proposes the following technical solutions:

[0012] A breathable and moisture-permeable composite fabric production process, which uses composite modified fabric production equipment to produce breathable and moisture-permeable composite fabrics, includes the following steps:

[0013] S1. Surface fabric preparation

[0014] preparing silk fiber yarn, vitamin E viscose fiber modified yarn and polyester yarn, and feeding them into a weaving machine for weaving;

[0015] S2. Preparation of inner fabric

[0016] (1) Select weaving equipment: Krit warp knitting machine, machine gauge is 28 needles / 25.4mm, machine width is 186″, number of bars is 2bars, machine speed is 1100-1300r / min;

[0017] (2) Set the machine parameters:

[0018] The yarn laying number of the front comb GB1 is 1-0 / 0-1 / / , the warp let-off is 1000-1050mm / rack, and the threading method is full threading;

[0019] The yarn laying number of GB2 is 1-0 / 3-4 / / , the warp let-off is 2000-2500mm / rack, and the threading method is full threading;

[0020] (3) Making a blank: Using collagen modified yarn and protein modified cotton yarn as raw materials, the front comb GB1 performs a chain-weaving yarn laying motion, and the back comb GB2 performs a warp-bending yarn laying motion, and the inner layer fabric is woven using a warp-bending chain-weaving structure;

[0021] S3, fabric composite

[0022] The surface fabric and the inner fabric are compounded by using a polyurethane spraying compounding process to obtain the breathable and moisture-permeable composite fabric.

[0023] On the basis of the above scheme and as a preferred scheme of the above scheme, the composite modified fabric production equipment includes a weaving machine, a polyurethane spray compound machine, a negative pressure pump and a high-pressure hot air blower, the polyurethane spray compound machine includes a frame, a reeling device, a polyurethane spraying device, a hot pressing device, a reeling device, a polyurethane glue supply barrel, a first metering pump, a cleaning solvent supply barrel, a second metering pump and a plurality of solenoid valves, the reeling device includes an inner layer material reeling device and a surface material reeling device, the surface material reeling device and the inner layer material reeling device are arranged on the upper wall of the frame in an upper and lower distribution, the hot pressing device and the reeling device are both arranged on the upper wall of the frame and are both located on the right side of the reeling device, and the polyurethane spraying device includes:

[0024] An insulation box for controlling the temperature of the polyurethane glue, the insulation box is fixedly connected to the upper wall of the frame and is located between the unwinding device and the hot pressing device, and an insulation structure is arranged inside the insulation box;

[0025] A feed connector, the feed connector is fixedly connected to the right wall of the heat preservation box and close to the upper wall. The end of the feed connector away from the heat preservation box is fixedly connected to the first reversing valve through a second feed pipe. The first reversing valve is provided with a group of inlets and two groups of outlets. The feed connector is fixedly connected to one of the two groups of outlets in the first reversing valve. The other group of outlets of the first reversing valve is fixedly connected to a reflux pipe. The end of the reflux pipe away from the first reversing valve is connected to a polyurethane glue supply barrel. The inlet of the first reversing valve is fixedly connected to a first metering pump through a first feed pipe. The end of the first metering pump away from the first feed pipe is fixedly connected to the polyurethane glue supply barrel.

[0026] A drying joint, the drying joint is fixedly connected to the right wall of the heat preservation box and is located below the feed joint, and one end of the drying joint away from the heat preservation box is connected to the high-pressure hot air blower through a high-temperature resistant air pipe;

[0027] A cleaning solvent joint, wherein the cleaning solvent joint is fixedly connected to the right wall of the heat preservation box and is located below the drying joint, wherein one end of the cleaning solvent joint away from the heat preservation box is fixedly connected to the second metering pump through a solvent pipeline, and one end of the second metering pump away from the solvent pipeline is connected to the cleaning solvent supply barrel;

[0028] A nozzle for spraying polyurethane glue, the nozzle is fixedly connected to the lower wall of the heat preservation box, the inner wall of the nozzle is provided with a fan-shaped atomizing spray hole for spraying polyurethane glue in a fan shape, and a protective cover is fixedly connected to the left wall of the nozzle;

[0029] A heating pipe, the heating pipe is fixedly connected to the lower wall of the inner side of the heat preservation box, the heating pipe is spiral and the spiral lower end is connected to the nozzle, the end of the heating pipe away from the nozzle is connected to the feed joint through a connecting pipe, the drying joint and the cleaning solvent joint facing the heat preservation box are both connected to the right wall of the heat preservation box and extend into the heat preservation box, and the ends of the drying joint and the cleaning solvent joint extending into the heat preservation box are both connected to the connecting pipe;

[0030] A heating structure for heating the heating pipe, wherein the heating structure is arranged on the inner wall of the heat preservation box;

[0031] A temperature detection structure for detecting the temperature inside the incubator, wherein the temperature detection structure is arranged on the left wall of the incubator;

[0032] A stopper for covering the nozzle, the stopper being rotatably connected to the left wall of the nozzle through a rotating structure, the stopper being located below the protective cover, a circular step being provided on the lower wall of the stopper, and the inner diameter of the circular step being consistent with the outer diameter of the nozzle;

[0033] A sealing structure for sealing when the cover covers the nozzle, the sealing structure being arranged on the inner upper wall of the step;

[0034] A driving structure for driving the rotating structure to move and thus driving the blocking cover to move, wherein the driving structure is fixedly connected to the lower wall of the heat preservation box and is located on the left side of the nozzle, and the driving structure is rotatably connected to the rotating structure through a connecting rod;

[0035] A first negative pressure connector and a second negative pressure connector, wherein the first negative pressure connector and the second negative pressure connector are respectively fixedly connected to the front wall of the nozzle and the upper wall of the baffle cover, the first negative pressure connector is connected to the inside of the nozzle, and the second negative pressure connector is connected to the inside of the circular step of the baffle cover;

[0036] The adsorption structure is used for sucking away the waste glue and cleaning liquid inside the nozzle, and the adsorption structure is arranged between the first negative pressure joint, the second negative pressure joint and the negative pressure pump.

[0037] On the basis of the above scheme and as a preferred scheme of the above scheme, the thermal insulation structure is a thermal insulation layer, and the thermal insulation layer is fixedly connected to the inner wall of the thermal insulation box.

[0038] On the basis of the above scheme and as a preferred scheme of the above scheme, the heating structure is an electric heating module, the electric heating module is fixedly connected to the lower wall of the inner side of the heat preservation box, and one end of the electric heating module away from the lower wall of the inner side of the heat preservation box extends into the spiral center of the spiral heating tube;

[0039] On the basis of the above scheme and as a preferred scheme of the above scheme, the temperature detection structure is a temperature sensor, and the temperature sensor is fixedly connected to the left wall of the incubator. One end of the temperature sensor facing the incubator passes through the left wall of the incubator and extends into the interior of the incubator.

[0040] On the basis of the above scheme and as a preferred scheme of the above scheme, the rotating structure includes a first rotating seat and a second rotating seat, the first rotating seat is fixedly connected to the left wall of the nozzle and is located inside the protective cover, the second rotating seat is fixedly connected to the upper wall of the baffle cover, the first rotating seat is rotatably connected to the first swing arm and the second swing arm from top to bottom on the side away from the nozzle, the second rotating seat is rotatably connected to the third swing arm and the fourth swing arm on the side away from the baffle cover from left to right, one end of the first swing arm away from the first rotating seat is rotatably connected with one end of the fourth swing arm away from the second rotating seat and one end of the connecting rod away from the driving structure, the second swing arm is rotatably connected with the fourth swing arm at the middle position in the length direction, the end of the second swing arm away from the first rotating seat is rotatably connected with one end of the third swing arm away from the second rotating seat, and the baffle cover can obtain a flipping range of 180 degrees through the first rotating seat, the second rotating seat, the first swing arm, the second swing arm, the third swing arm and the fourth swing arm.

[0041] On the basis of the above scheme and as a preferred scheme of the above scheme, the sealing structure is a sealing gasket, which is fixedly connected to the upper wall of the inner side wall of the circular step of the blocking cover, and a through hole that penetrates up and down is provided in the center of the inner wall of the sealing gasket.

[0042] On the basis of the above scheme and as a preferred scheme of the above scheme, the driving structure is an electric telescopic rod, which is fixedly connected to the lower wall of the insulation box and located on the left side of the nozzle, and the extension shaft of the electric telescopic rod is rotatably connected to the end of the connecting rod away from the rotating structure.

[0043] On the basis of the above scheme and as a preferred scheme of the above scheme, the adsorption structure includes a first suction pipe, a second suction pipe, and a waste liquid bottle. The first suction pipe is fixedly connected to an end of the first negative pressure joint away from the nozzle, the second suction pipe is fixedly connected to an end of the second negative pressure joint away from the baffle, the end of the first suction pipe away from the first negative pressure joint and the end of the second suction pipe away from the second negative pressure joint are commonly fixedly connected to a second reversing valve, one end of the second reversing valve away from the first suction pipe and the second suction pipe is fixedly connected to a main suction pipe, the waste liquid bottle is fixedly connected to an end of the main suction pipe away from the second reversing valve, a group of inlets and outlets are provided on the waste liquid bottle, the inlet of the waste liquid bottle is fixedly connected to an introduction pipe that passes through the inside of the waste liquid bottle, the main suction pipe is connected to the introduction pipe, and the outlet of the waste liquid bottle is connected to a negative pressure pump through a negative pressure pipe.

[0044] On the basis of the above scheme and as a preferred scheme of the above scheme, the breathable and moisture-permeable composite fabric comprises a composite surface fabric and an inner fabric:

[0045] The surface fabric is formed by alternately interweaving silk fiber yarn as warp yarn, vitamin E viscose fiber modified yarn and polyester yarn as weft yarn; the warp density of the surface fabric is 1100 yarns / 10cm, the weft density is 450 yarns / 10cm, and the organization structure is 5-piece 3-fly satin;

[0046] The inner layer fabric is made of collagen modified yarn and protein modified cotton yarn, and is woven by the front comb GB1 and the back comb GB2 of a single needle bed warp knitting machine; wherein the front comb GB1 performs chain yarn padding movement, and the back comb GB2 performs warp diagonal yarn padding movement.

[0047] On the basis of the above scheme and as a preferred scheme of the above scheme, the collagen-modified composite fiber constituting the collagen-modified yarn includes the following substances in parts by weight:

[0048] Polyvinyl alcohol 75-88 parts;

[0049] 15-30 parts of collagen;

[0050] 1.5-4.5 parts of silver-loaded graphene oxide.

[0051] On the basis of the above scheme and as a preferred scheme of the above scheme, the fineness of the polyester yarn is 140-160dtex, the fineness of the vitamin E viscose fiber modified yarn is 140-160dtex, and the weft ratio of the vitamin E viscose fiber modified yarn to the polyester yarn is (1-3):1.

[0052] On the basis of the above scheme and as a preferred scheme of the above scheme, the vitamin E viscose fiber modified yarn is a viscose fiber loaded with core-shell structured vitamin E nanoparticles.

[0053] On the basis of the above scheme and as a preferred scheme of the above scheme, the particle size of the core-shell structured vitamin E nanoparticles is 0.1-0.5 um.

[0054] On the basis of the above scheme and as a preferred scheme of the above scheme, the protein-modified cotton yarn is made by finishing with a polycarboxylic acid finishing agent and then adsorbing sericin on the surface of the fiber.

[0055] On the basis of the above scheme and as a preferred scheme of the above scheme, the polycarboxylic acid finishing agent is citric acid.

[0056] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0057] The present invention discloses a production process and equipment for breathable and moisture-permeable composite fabrics. The surface fabrics used in the fabrics use vitamin E viscose fiber modified yarns with excellent moisture permeability and breathability, wherein vitamin E can also capture free radicals to form stable compounds, and has good antioxidant properties; the inner fabrics use collagen modified yarns and protein modified cotton yarns as raw materials, and utilize the formation of chemical bonds to prevent the loss of collagen, thereby ensuring the stability of the fibers and having the effect of moisturizing and skin care. The composite fabrics of the present invention have the advantages of moisture permeability and quick drying, breathable and comfortable, moisturizing and skin care, and anti-oxidation, and are suitable for further promotion and use.

[0058] The composite modified fabric production equipment of the present invention comprises a weaving machine, a polyurethane spray compound machine, a negative pressure pump and a high-pressure hot air blower; when the present invention is shut down for a short time, a part of the glue in the nozzle is sucked away by the negative pressure pump, and a certain negative pressure is maintained, so that the glue in the nozzle will not drip onto the surface of the inner layer of the fabric; when the material change, the type change, etc. require a long shutdown time, the first reversing valve is switched to return the fed glue from the reflux pipe to the polyurethane glue supply barrel, so as to avoid the glue staying in the first feed pipe for a long time and causing gelling; while the glue refluxes, the rotating structure is driven by the electric telescopic rod to drive the baffle cover to cover the nozzle, the negative pressure pump generates negative pressure to suck the remaining glue in the nozzle into the waste liquid bottle, and the cleaning solvent is introduced through the cleaning solvent joint to flush the connecting pipe and the inside of the heating pipe.

[0059] Compared with the existing technology, the composite modified fabric production equipment sprays polyurethane glue to the side of the inner fabric opposite to the surface fabric through the fan-shaped atomizing nozzle in the nozzle before the surface fabric and the inner fabric are laminated, and then laminated after hot pressing by a hot pressing device. When the machine is stopped for a short time, a part of the glue in the nozzle is sucked away by a negative pressure pump, and a certain negative pressure is maintained, so that the glue in the nozzle will not drip onto the surface of the inner fabric, avoiding the defect of excessive local glue.

[0060] Compared with the prior art, the composite modified fabric production equipment, when changing materials, changing models, etc. requires a long period of downtime, the first reversing valve switches to return the fed glue from the reflux pipe to the polyurethane glue supply barrel, thereby preventing the glue from staying in the first feed pipe for a period of time and causing gelling. While the glue is reflowing, the electric telescopic rod drives the rotating structure to drive the baffle cover to cover the nozzle, and the negative pressure pump generates negative pressure to suck the remaining glue in the nozzle into the waste liquid bottle, and the cleaning solvent is introduced through the cleaning solvent joint to flush the inside of the connecting pipe and the heating pipe. The waste liquid after flushing also follows the negative pressure generated by the negative pressure pump into the waste liquid bottle for collection, and then hot air is introduced through the drying joint to dry the inside, which does not affect the use of the nozzle in subsequent production, does not require manual cleaning, and also avoids the problem of decreased adhesion due to long-term heating of the glue.

[0061] It should be appreciated that all combinations of the foregoing concepts, as well as additional concepts described in greater detail below, may be considered part of the present subject matter disclosure to the extent such concepts are not mutually inconsistent.

[0062] The foregoing and other aspects, embodiments and features of the present invention will be more fully understood from the following description. Other additional aspects of the present invention, such as the features and / or beneficial effects of the exemplary embodiments, will be apparent from the following description or will be learned from the practice of the specific embodiments according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 This is a schematic diagram of the overall structure of the composite modified fabric production equipment of the present invention;

[0064] Figure 2 For the present invention Figure 1 A partial enlarged view of the middle A;

[0065] Figure 3 It is a partial cross-sectional view of the internal structure of the waste liquid bottle of the composite modified fabric production equipment of the present invention;

[0066] Figure 4 It is a partial cross-sectional view of the internal structure of the protective cover of the composite modified fabric production equipment of the present invention;

[0067] Figure 5It is a partial cross-sectional view of the internal structure of the heat preservation box of the composite modified fabric production equipment of the present invention;

[0068] Figure 6 For the present invention Figure 5 A partial enlarged view of point B in the middle.

[0069] Among them, 1. the first feed pipe; 2. the first reversing valve; 3. the reflux pipe; 4. the second feed pipe; 5. the insulation box; 6. the feed joint; 7. the drying joint; 8. the cleaning solvent joint; 9. the nozzle; 10. the first negative pressure joint; 11. the protective cover; 12. the electric telescopic rod; 13. the first suction pipe; 14. the second suction pipe; 15. the second reversing valve; 16. the main suction pipe; 17. the waste liquid bottle; 18. the negative pressure pipe; 19. the fan-shaped atomizing spray hole; 20. the blocking cover; 21. the sealing gasket; 22. the second negative pressure joint; 23. the inlet pipe; 24. the connecting rod; 25. the first rotating seat; 26. the first swing arm; 27. the second swing arm; 28. the second rotating seat; 29. ​​the third swing arm; 30. the fourth swing arm; 31. the connecting pipe; 32. the heating pipe; 33. the electric heating module; 34. the temperature sensor; 35. the insulation layer. DETAILED DESCRIPTION

[0070] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described 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. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with general skills in the field to which the present invention belongs.

[0071] The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular forms of "a", "an" or "the" and other similar words do not indicate a quantitative limitation, but indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" cover the features, wholes, steps, operations, elements and / or components listed after "include" or "comprise", and do not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0072] In the present invention, the silver-loaded graphene oxide is prepared by configuring graphite oxide into a 1.5 mg / mL aqueous solution, and then ultrasonicating the graphene oxide aqueous solution with a 480W power ultrasonic machine for 30 minutes, and then dropping the same volume of 0.5 mg / mL silver nitrate solution at a rate of 0.5 mL / min using a dropping funnel to obtain a mixed aqueous solution; then, 0.5 wt% of APTES and 1 mol / L ammonia solution are added to the mixed aqueous solution in sequence, and stirred for 24 hours at a stirring speed of 650 rpm-850 rpm, put into a reactor, and place it in a blast drying oven at 80° C. for 24 hours, take it out and place it to room temperature, and wash it with deionized water to obtain the silver-loaded graphene oxide.

[0073] Further, polyvinyl alcohol and water are stirred and dissolved at 95°C for 4 hours in a certain proportion, and collagen is soaked in distilled water twice its mass at room temperature for 4 hours. After the polyvinyl alcohol is dissolved, the temperature is lowered to 65°C, and the swollen collagen is added to the polyvinyl alcohol solution and stirred for 1 hour. Silver-loaded graphene oxide is configured into a 3.5% aqueous solution, and a constant pressure dropping funnel is used to slowly drop the silver-loaded graphene oxide solution into the blended solution, stir evenly, filter after 30 minutes, and degas to obtain a spinning solution. Finally, wet spinning is used to obtain collagen-modified composite fibers, wherein the spinneret aperture is 0.08mm, the stock solution temperature is 65°C, the coagulation bath is a saturated sodium sulfate solution, and the coagulation bath temperature is 45°C. The fiber is then subjected to processes such as hot stretching and shaping to produce collagen-modified yarn.

[0074] In the collagen modified yarn system, silver-loaded graphene oxide can not only provide silver elements and improve fiber strength, but also has antibacterial and mildew-proof effects; on the other hand, because graphene oxide has a large specific surface area and rich hydroxyl, carboxyl, and epoxy groups, it can form ester bonds with the hydroxyl groups of polyvinyl alcohol and amide bonds with the amino groups of collagen. In this way, during the use of the fiber, the formation of chemical bonds can be used to reduce or prevent the loss of collagen, thereby ensuring the stability of the fiber. The mechanical properties of the yarn were tested using a fiber electronic strength meter. After testing, the mechanical strength of the collagen fiber prepared without adding silver-loaded graphene oxide was 3.40 cN / dtex at break and 12.80% at break; the mechanical strength of the collagen modified composite fiber prepared after adding silver-loaded graphene oxide was 4.95 cN / dtex at break and 12.56% at break.

[0075] Furthermore, the protein-modified cotton yarn is prepared by adsorbing sericin on the surface of the fiber after finishing with a polycarboxylic acid finishing agent. The specific preparation method includes the following steps:

[0076] (1) Cotton yarn pretreatment

[0077] The raw cotton yarn is placed in a deionized water solution at 60-70°C for constant temperature scouring to perform desizing and remove impurities.

[0078] (2) Impregnation modification

[0079] The treated cotton yarn is placed in a mixed solution of 9wt% citric acid and 4wt% sodium hypophosphite at a bath ratio of 1:20. After being fully immersed for 5 minutes, it is taken out, immersed and rolled, dried at 80°C, and then placed in a 3wt% sodium bicarbonate solution (bath ratio of 1:30) for 30 minutes. The cotton yarn that has been fully washed and dried is then immersed in a 6wt% sericin solution at a bath ratio of 1:30 and the immersion time is 60 minutes. After being fully washed, it is dried at 80°C for 0.5-1h.

[0080] The protein modification design of cotton yarn can improve the hygroscopicity of cotton yarn and enhance the moisturizing effect of cotton yarn by utilizing the skin care effect of amino acids. The fabric made in this way can eliminate human sweat and is not easy to produce stuffiness and stickiness, thus achieving the effect of rapid moisture absorption. Secondly, it can respond to the humidity changes of the wearing space and the external environment through hygroscopicity and dehumidification, that is, it can regulate humidity and enhance the comfort of use when wearing. Its mechanism is:

[0081] Cotton fibers contain a large number of hydroxyl groups, which can combine with the carboxyl groups in citric acid to undergo an esterification reaction: the two adjacent carboxyl groups in citric acid are first dehydrated to form anhydrides, which then further react with the hydroxyl groups on the cotton fibers to form esters. After the carboxylated cotton yarn is treated with sodium bicarbonate, a large number of negatively charged carboxyl groups are formed on the fiber surface, which can combine with a large number of amino acid derivatives in the form of ionic bonds in aqueous solution to achieve a large amount of amino acid adsorption, thereby achieving the purpose of collagenization of fiber yarns.

[0082] Furthermore, the vitamin E viscose fiber modified yarn used in the present invention is selected from the vitamin E viscose fiber of Huamao Biotech Co., Ltd., which is specifically a viscose fiber formed by adding tourmaline material to the spinning solution to encapsulate the core-shell structure nanoparticles of vitamin E, and blending and spinning. The vitamin E viscose yarn is made by compact spinning, which has the performance of viscose fiber and good antioxidant and deodorizing functions. The vitamin E content in the viscose fiber is 0.26 mg / kg as tested by Beijing Zhongke Optical Analysis Chemical Technology Research.

[0083] Performance Testing

[0084] Air permeability test

[0085] The air permeability test refers to the GB / T 5453-1997 method, where the test parameters are: pressure difference 100Pa, sample area 20cm 2.

[0086] Moisture permeability

[0087] The moisture permeability test refers to the GB / T 12704.1-2009 method, where the test parameters are working temperature (38±2)℃, relative humidity (90±2)%, and sample diameter 70mm.

[0088] Antioxidant properties

[0089] The 1,1-diphenyl-2-picrylhydrazyl (DPPH) method is used to test the antioxidant properties of the fabric. The DPPH method is used to measure the absorbance of the DPPH·ethanol solution at 517nm using an ultraviolet spectrophotometer to determine the ability of the fabric to eliminate free radicals. The smaller the absorbance value at 517nm, the more free radicals the fabric removes, and the better its antioxidant performance. In the present invention, it is converted into a DPPH free radical elimination rate to indicate the quality of its antioxidant performance.

[0090] Determination of collagen content

[0091] The collagen content of the sample is an important indicator of composite modified fabrics. It is tested according to the "First Method" in GB / T5009.5-2016 "National Food Safety Standard Determination of Protein in Food". The protein content in the sample is determined after sampling and water extraction, which is used as the collagen content of the sample. The detailed test method is described in the standard and will not be repeated here.

[0092] Examples 1-4

[0093] A breathable and moisture-permeable composite fabric, comprising a composite surface fabric and an inner fabric:

[0094] The surface fabric is formed by alternately interweaving silk fiber yarn as warp yarn, vitamin E viscose fiber modified yarn and polyester yarn as weft yarn; the warp density of the surface fabric is 1100 yarns / 10cm, the weft density is 450 yarns / 10cm, and the organization structure is 5-piece 3-fly satin;

[0095] The inner layer fabric is made of collagen modified yarn and protein modified cotton yarn, and is woven by a front comb GB1 and a back comb GB2 of a single needle bed warp knitting machine; wherein the front comb GB1 performs a chain yarn laying motion, and the back comb GB2 performs a warp oblique yarn laying motion;

[0096] The collagen-modified composite fiber constituting the collagen-modified yarn includes polyvinyl alcohol, collagen and silver-loaded graphene oxide, and the usage amounts thereof are shown in Table 1.

[0097] Furthermore, the vitamin E viscose fiber modified yarn is viscose fiber loaded with core-shell structured vitamin E nanoparticles, and its weft ratio to the polyester yarn is shown in Table 1.

[0098] A method for preparing an air-permeable and moisture-permeable composite fabric comprises the following steps:

[0099] S1. Surface fabric preparation

[0100] preparing silk fiber yarn, vitamin E viscose fiber modified yarn and polyester yarn, and feeding them into a weaving machine for weaving;

[0101] S2. Preparation of inner fabric

[0102] (1) Select weaving equipment: Krit warp knitting machine, machine gauge is 28 needles / 25.4mm, machine width is 186″, number of bars is 2bars, machine speed is 1100-1300r / min;

[0103] (2) Set the machine parameters:

[0104] The yarn laying number of the front comb GB1 is 1-0 / 0-1 / / , the warp let-off is 1000-1050mm / rack, and the threading method is full threading;

[0105] The yarn laying number of GB2 is 1-0 / 3-4 / / , the warp let-off is 2000-2500mm / rack, and the threading method is full threading;

[0106] (3) Making a blank: Using collagen modified yarn and protein modified cotton yarn as raw materials, the front comb GB1 performs a chain-weaving yarn laying motion, and the back comb GB2 performs a warp-bending yarn laying motion, and the inner layer fabric is woven using a warp-bending chain-weaving structure;

[0107] S3, fabric composite

[0108] The surface fabric and the inner fabric are compounded by using a polyurethane spray compounding process.

[0109] Comparative Example 1

[0110] Different from Example 1, the inner layer fabric of the composite modified fabric in this example is made of collagen modified yarn as raw material and is woven by the front comb GB1 and the back comb GB2 of a single needle bed warp knitting machine, and the front comb GB1 and the back comb GB2 are both collagen modified yarn.

[0111] Comparative Examples 2-4

[0112] The fiber yarns were prepared according to different material usage ratios, and the fabrics were woven and compounded according to the same preparation method as in Example 1 to obtain the corresponding fabrics for performance testing and comparison. The usage of each material and the comparison of related tests are shown in Table 1.

[0113] Table 1 Material ratio and test results analysis table

[0114]

[0115] From the comparison results in Table 1 above, we can see that:

[0116] (1) Under the premise that other conditions remain unchanged, increasing the proportion of vitamin E viscose fiber modified yarn can improve the air permeability and moisture permeability of the fabric;

[0117] (2) Silver-loaded graphene oxide in collagen-modified yarn has the effect of stabilizing collagen, thereby optimizing the moisturizing and skin care properties of the yarn;

[0118] (3) The use of vitamin E viscose fiber modified yarn has a great influence on the antioxidant properties.

[0119] Embodiment 5-8

[0120] A process for producing a breathable and moisture-permeable composite fabric according to embodiments 5-8, wherein the breathable and moisture-permeable composite fabrics correspond to embodiments 1-4 respectively, for example, the breathable and moisture-permeable composite fabrics in embodiment 7 correspond to embodiment 3 respectively;

[0121] In the specific embodiments 5-8, a breathable and moisture-permeable composite fabric production process adopts a composite modified fabric production equipment to produce the breathable and moisture-permeable composite fabric; the composite modified fabric production equipment adopted is the same;

[0122] like Figures 1 to 6 As shown, the composite modified fabric production equipment includes a weaving machine, a polyurethane spray compound machine, a negative pressure pump and a high-pressure hot air blower. The polyurethane spray compound machine includes a frame, a reeling device, a polyurethane spray device, a hot pressing device, a reeling device, a polyurethane glue supply barrel, a first metering pump, a cleaning solvent supply barrel, a second metering pump and a plurality of solenoid valves. The reeling device includes an inner material reeling device and a surface material reeling device. The surface material reeling device and the inner material reeling device are arranged on the upper wall of the frame in an upper and lower distribution. The hot pressing device and the reeling device are both arranged on the upper wall of the frame and are both located on the right side of the reeling device. The technical solution in this implementation is mainly optimized and improved for the polyurethane Euhn diagram device part, and the rest is basically consistent with the prior art;

[0123] The polyurethane spraying device comprises: an insulation box 5 for controlling the temperature of polyurethane glue, a feed joint 6, a drying joint 7, a cleaning solvent joint 8, a nozzle 9 for spraying polyurethane glue, a heating tube 32, a heating structure for heating the heating tube 32, a temperature detection structure for detecting the temperature inside the insulation box 5, a baffle 20 for covering the nozzle 9, a sealing structure for sealing when the baffle 20 shields the nozzle 9, a driving structure for driving the rotating structure to move and thereby driving the baffle 20 to move, a first negative pressure joint 10, a second negative pressure joint 22, and an adsorption structure for sucking away waste glue and cleaning liquid inside the nozzle 9;

[0124] The heat preservation box 5 is fixedly connected to the upper wall of the frame and is located between the unwinding device and the hot pressing device. A heat preservation structure is arranged inside the heat preservation box 5. The heat preservation structure is a heat preservation layer 35. The heat preservation layer 35 is fixedly connected to the inner wall of the heat preservation box 5. The heat preservation layer 35 can reduce the heat loss rate in the heat preservation box 5, reduce the number of times the electric heating module 33 is used, and save energy.

[0125] The feed connector 6 is fixedly connected to the right wall of the heat preservation box 5 and close to the upper wall. The end of the feed connector 6 away from the heat preservation box 5 is fixedly connected to the first reversing valve 2 through the second feed pipe 4. The first reversing valve 2 is provided with a group of inlets and two groups of outlets. The feed connector 6 is fixedly connected to one of the two groups of outlets in the first reversing valve 2. The other group of outlets of the first reversing valve 2 is fixedly connected to the reflux pipe 3. The end of the reflux pipe 3 away from the first reversing valve 2 is connected to the polyurethane glue supply barrel. The inlet of the first reversing valve 2 is fixedly connected to the first metering pump through the first feed pipe 1. The end of the first metering pump away from the first feed pipe 1 It is fixedly connected to the polyurethane glue supply barrel. During normal spraying and compounding, the first metering pump extracts polyurethane glue from the polyurethane glue supply barrel, passes through the first feed pipe 1, the first reversing valve 2, the second feed pipe 4, the connecting pipe 31, and the heating pipe 32, and enters the nozzle 9, and then sprays out through the fan-shaped atomizing spray hole 19 in the nozzle 9. When the downtime is long, in order to avoid the gelation caused by the glue staying in the first feed pipe 1 for a long time, the flow direction is switched by the first reversing valve 2, and the polyurethane glue in the first feed pipe 1 returns to the polyurethane glue supply barrel along the first reversing valve 2 and the reflux pipe 3;

[0126] The cleaning solvent joint 8 is fixedly connected to the right wall of the heat preservation box 5 and is located below the drying joint 7. The end of the cleaning solvent joint 8 away from the heat preservation box 5 is fixedly connected to the second metering pump through the solvent pipeline. The end of the second metering pump away from the solvent pipeline is connected to the cleaning solvent supply barrel. When the reflux pipe 3 is activated, some glue must remain inside the nozzle 9, the heating pipe 32, and the connecting pipe 31. The cleaning solvent in the cleaning solvent supply barrel can be extracted by the second metering pump and passed into the nozzle 9, the heating pipe 32, and the connecting pipe 31 for cleaning, thereby improving the quality of subsequent glue use and improving the composite bonding force;

[0127] The drying joint 7 is fixedly connected to the right wall of the heat preservation box 5 and is located below the feed joint 6. The end of the drying joint 7 away from the heat preservation box 5 is connected to the high-pressure hot air blower through a high-temperature resistant air pipe. After the solvent cleans the pipeline, high-temperature air is introduced through the drying joint 7 to dry the inside of the pipeline;

[0128] The nozzle 9 is fixedly connected to the lower wall of the heat preservation box 5. The inner wall of the nozzle 9 is provided with a fan-shaped atomizing spray hole 19 for spraying polyurethane glue in a fan shape. The left wall of the nozzle 9 is fixedly connected with a protective cover 11. During compounding, the glue is sprayed from the fan-shaped atomizing spray hole 19 and evenly sprinkled on the surface of the inner layer of fabric.

[0129] The heating pipe 32 is fixedly connected to the lower wall of the inner side of the heat preservation box 5. The heating pipe 32 is spiral and the spiral lower end is connected to the nozzle 9. The end of the heating pipe 32 away from the nozzle 9 is connected to the feed joint 6 through the connecting pipe 31. The drying joint 7 and the cleaning solvent joint 8 facing the heat preservation box 5 are both connected to the right wall of the heat preservation box 5 and extend into the heat preservation box 5. The ends of the drying joint 7 and the cleaning solvent joint 8 extending into the heat preservation box 5 are both connected to the connecting pipe 31. The heating structure is arranged on the inner wall of the heat preservation box 5. The heating structure is an electric heating module 33. The electric heating module 33 is fixed Connected to the lower inner wall of the heat preservation box 5, one end of the electric heating module 33 away from the lower inner wall of the heat preservation box 5 extends into the spiral center of the heating tube 32, the temperature detection structure is arranged on the left wall of the heat preservation box 5, the temperature detection structure is a temperature sensor 34, the temperature sensor 34 is fixedly connected to the left wall of the heat preservation box 5, one end of the temperature sensor 34 facing the heat preservation box 5 penetrates the left wall of the heat preservation box 5 and extends into the heat preservation box 5, the electric heating module 33 is used in conjunction with the temperature sensor 34, and can heat the spiral structure of the heating tube 32 to achieve a suitable spraying temperature;

[0130] The stopper 20 is rotatably connected to the left wall of the nozzle 9 through a rotating structure. The stopper 20 is located below the protective cover 11. The rotating structure includes a first rotating seat 25 and a second rotating seat 28. The first rotating seat 25 is fixedly connected to the left wall of the nozzle 9 and is located inside the protective cover 11. The second rotating seat 28 is fixedly connected to the upper wall of the stopper 20. The first rotating seat 25 is rotatably connected to the first swing arm 26 and the second swing arm 27 from top to bottom on the side away from the nozzle 9. The second rotating seat 28 is rotatably connected to the third swing arm 29 and the fourth swing arm 30 from left to right on the side away from the stopper 20. The end of the first swing arm 26 away from the first rotating seat 25 is connected to the stopper 20. The end of the fourth swing arm 30 away from the second rotating seat 28 and the end of the connecting rod 24 away from the driving structure are rotatably connected together, the second swing arm 27 is rotatably connected to the fourth swing arm 30 at the middle position in the length direction, and the end of the second swing arm 27 away from the first rotating seat 25 is rotatably connected to the end of the third swing arm 29 away from the second rotating seat 28. The blocking cover 20 can obtain a 180-degree flipping range through the first rotating seat 25, the second rotating seat 28, the first swing arm 26, the second swing arm 27, the third swing arm 29 and the fourth swing arm 30. The blocking cover 20 can be flipped when pushed due to the restriction of the rotating structure to facilitate covering the nozzle 9;

[0131] A circular step is provided on the lower wall of the stopper 20, and the inner diameter of the circular step matches the outer diameter of the nozzle 9. A sealing structure is provided on the inner upper wall of the step, and the sealing structure is a sealing gasket 21. The sealing gasket 21 is fixedly connected to the upper wall of the inner side wall of the circular step of the stopper 20. A through hole that penetrates from top to bottom is provided on the inner wall and in the center of the sealing gasket 21. When the nozzle 9 needs to be cleaned, the stopper 20 is turned 180 degrees in advance to cover the lower end of the nozzle 9. The sealing gasket 21 can improve the sealing of the connection to avoid leakage when sucking glue or cleaning solvents.

[0132] The driving structure is fixedly connected to the lower wall of the heat preservation box 5 and is located on the left side of the nozzle 9. The driving structure is rotatably connected to the rotating structure through the connecting rod 24. The driving structure is an electric telescopic rod 12. The electric telescopic rod 12 is fixedly connected to the lower wall of the heat preservation box 5 and is located on the left side of the nozzle 9. The extension shaft of the electric telescopic rod 12 is rotatably connected to the end of the connecting rod 24 away from the rotating structure. The extension and retraction action of the extension shaft of the electric telescopic rod 12 can drive the rotating structure to move through the connecting rod 24, thereby driving the blocking cover 20 to rotate;

[0133] The first negative pressure joint 10 and the second negative pressure joint 22 are respectively fixedly connected to the front wall of the nozzle 9 and the upper wall of the baffle 20. The first negative pressure joint 10 is connected to the inside of the nozzle 9, and the second negative pressure joint 22 is connected to the inside of the circular step of the baffle 20. The adsorption structure is arranged between the first negative pressure joint 10, the second negative pressure joint 22 and the negative pressure pump. The adsorption structure includes a first suction pipe 13, a second suction pipe 14, and a waste liquid bottle 17. The first suction pipe 13 is fixedly connected to the end of the first negative pressure joint 10 away from the nozzle 9, and the second suction pipe 14 is connected to the end of the second negative pressure joint 10 away from the nozzle 9. The material pipe 14 is fixedly connected to the end of the second negative pressure joint 22 away from the blocking cover 20, the end of the first suction pipe 13 away from the first negative pressure joint 10 and the end of the second suction pipe 14 away from the second negative pressure joint 22 are fixedly connected to the second reversing valve 15, the end of the second reversing valve 15 away from the first suction pipe 13 and the second suction pipe 14 is fixedly connected to the main suction pipe 16, the waste liquid bottle 17 is fixedly connected to the end of the main suction pipe 16 away from the second reversing valve 15, and a group of inlet and outlet are provided on the waste liquid bottle 17 The inlet of the waste liquid bottle 17 is fixedly connected with an introduction pipe 23 that passes through the inside of the waste liquid bottle 17, the main suction pipe 16 is connected with the introduction pipe 23, and the outlet of the waste liquid bottle 17 is connected with the negative pressure pump through the negative pressure pipe 18. When the material change or type change requires a long time of shutdown, the first reversing valve 2 returns the fed glue from the reflux pipe 3 to the polyurethane glue supply barrel, avoiding the glue from staying in the first feed pipe 1 for a long time and causing gelation, so that while the glue refluxes, the electric telescopic rod 12 drives the rotating structure to drive the stopper The cap 20 covers the nozzle 9, and the negative pressure pump generates negative pressure to suck the remaining glue in the nozzle 9 into the waste liquid bottle 17, and the cleaning solvent is introduced through the cleaning solvent connector 8 to flush the connecting tube 31 and the heating tube 32. The waste liquid after flushing also enters the waste liquid bottle 17 for collection along the negative pressure generated by the negative pressure pump, and then hot air is introduced through the drying connector 7 to dry the inside. This will not affect the use of the nozzle 9 in subsequent production, does not require manual cleaning, and also avoids the problem of decreased adhesion due to long-term heating of the glue.

[0134] Working principle: During normal spraying and compounding, the first metering pump draws polyurethane glue from the polyurethane glue supply barrel, passes through the first feed pipe 1, the first reversing valve 2, the second feed pipe 4, the connecting pipe 31, and the heating pipe 32, and then enters the nozzle 9, and then sprays out through the fan-shaped atomizing spray hole 19 in the nozzle 9. During compounding, the glue is sprayed out from the fan-shaped atomizing spray hole 19 and evenly sprinkled on the surface of the inner layer of the fabric. When the downtime is long, in order to avoid the gelation caused by the glue staying in the first feed pipe 1 for a long time, the flow direction is switched by the first reversing valve 2, and the polyurethane glue in the first feed pipe 1 returns along the first reversing valve 2 and the reflux pipe 3. Back to the polyurethane glue supply barrel, when the reflux pipe 3 is activated, some glue must still remain inside the nozzle 9, the heating tube 32, and the connecting tube 31. The cleaning solvent in the cleaning solvent supply barrel can be extracted through the second metering pump, and introduced into the nozzle 9, the heating tube 32, and the connecting tube 31 for cleaning, thereby improving the quality of subsequent glue use and the composite bonding force. After the solvent cleans the pipeline, high-temperature air is introduced through the drying joint 7 to dry the inside of the pipeline. The electric heating module 33 is used in conjunction with the temperature sensor 34 to heat the spiral structure of the heating tube 32 to achieve a suitable spraying temperature. When the nozzle 9 is opened, the cover is pre-placed. 20 is turned 180 degrees to cover the lower end of the nozzle 9, and the sealing pad 21 can improve the sealing of the connection to avoid leakage when sucking glue or cleaning solvent. The extension and retraction of the electric telescopic rod 12 can drive the rotation structure to move through the connecting rod 24, and then drive the cover 20 to rotate. When the material change, type change, etc. require a long time of shutdown, the first reversing valve 2 returns the fed glue from the reflux pipe 3 to the polyurethane glue supply barrel, avoiding the glue staying in the first feed pipe 1 for a long time and causing gelation. When the glue refluxes, the electric telescopic rod 12 drives the rotating structure to drive the cover 20 to cover the nozzle 9, and the negative The pressure pump generates negative pressure to suck the remaining glue in the nozzle 9 into the waste liquid bottle 17, and the cleaning solvent is introduced through the cleaning solvent joint 8 to flush the inside of the connecting pipe 31 and the heating pipe 32. The waste liquid after flushing also enters the waste liquid bottle 17 for collection along the negative pressure generated by the negative pressure pump, and then hot air is introduced through the drying joint 7 to dry the inside, which does not affect the use of the nozzle 9 in subsequent production, does not require manual cleaning, and avoids the problem of decreased adhesion caused by long-term heating of the glue. The heat loss rate in the insulation box 5 can be reduced through the insulation layer 35, the number of times the electric heating module 33 is used is reduced, and energy is saved; in actual production:

[0135] Preparation of surface fabric: preparing silk fiber yarn, vitamin E viscose fiber modified yarn and polyester yarn, feeding them into a weaving machine for weaving, and obtaining surface fabric;

[0136] Preparation of inner layer fabric: preparing a Corite warp knitting machine, collagen modified yarn and protein modified cotton yarn, and weaving the inner layer fabric by using a warp diagonal chain weave structure;

[0137] Fabric compounding, the surface fabric and the inner fabric are respectively placed on the surface material unwinding device and the inner material unwinding device of the polyurethane spray compounding machine, and after being pulled out, they pass through the polyurethane spraying device, the hot pressing device, and the rewinding device in sequence. When the surface fabric and the inner fabric pass through the polyurethane spraying device, the polyurethane glue is sprayed to the side of the inner fabric facing the surface fabric through the fan-shaped atomizing spray hole 19 in the nozzle 9. After spraying and watering, they are hot-pressed and compounded by the hot pressing device, and then rewound by the rewinding device.

[0138] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. A process for producing a breathable and moisture-permeable composite fabric, characterized in that: The production of breathable and moisture permeable composite fabrics using composite modified fabric production equipment includes the following steps: S1. Surface fabric preparation preparing silk fiber yarn, vitamin E viscose fiber modified yarn and polyester yarn, and feeding them into a weaving machine for weaving; S2. Preparation of inner fabric (1) Select weaving equipment: Krit warp knitting machine, machine gauge is 28 needles / 25.4mm, machine width is 186″, number of bars is 2bars, machine speed is 1100-1300r / min; (2) Set the machine parameters: The yarn laying number of the front comb GB1 is 1-0 / 0-1 / / , the warp let-off is 1000-1050mm / rack, and the threading method is full threading; The yarn number of GB2 back comb is 1-0 / 3-4 / / , the warp let-off is 2000-2500mm / rack, and the threading method is full threading; (3) Making a blank: Using collagen modified yarn and protein modified cotton yarn as raw materials, the front comb GB1 performs a chain-weaving yarn laying motion, and the back comb GB2 performs a warp-bending yarn laying motion, and the inner layer fabric is woven using a warp-bending chain-weaving structure; The collagen-modified composite fiber constituting the collagen-modified yarn comprises the following substances in parts by weight: Polyvinyl alcohol 75-88 parts; 15-30 parts of collagen; 1.5-4.5 parts of silver-loaded graphene oxide; S3, fabric composite The surface fabric and the inner fabric are compounded by a polyurethane spraying compounding process to obtain the breathable and moisture-permeable composite fabric; The composite modified fabric production equipment used in the breathable and moisture-permeable composite fabric production process includes a weaving machine, a polyurethane spraying composite machine, a negative pressure pump and a high-pressure hot air blower. The polyurethane spraying composite machine includes a frame, a reeling device, a polyurethane spraying device, a hot pressing device, a reeling device, a polyurethane glue supply barrel, a first metering pump, a cleaning solvent supply barrel, a second metering pump and a plurality of solenoid valves. The reeling device includes an inner layer material reeling device and a surface material reeling device. The surface material reeling device and the inner layer material reeling device are arranged on the upper wall of the frame in an upper and lower distribution. The hot pressing device and the reeling device are both arranged on the upper wall of the frame and are both located on the right side of the reeling device. The polyurethane spraying device includes: A heat preservation box (5) for controlling the temperature of the polyurethane glue, the heat preservation box (5) being fixedly connected to the upper wall of the frame and being located between the unwinding device and the hot pressing device, and a heat preservation structure being arranged inside the heat preservation box (5); A feed connector (6), the feed connector (6) is fixedly connected to the right wall of the heat preservation box (5) and close to the upper wall. The end of the feed connector (6) away from the heat preservation box (5) is fixedly connected to the first reversing valve (2) through the second feed pipe (4). The first reversing valve (2) is provided with a group of inlets and two groups of outlets. The feed connector (6) is fixedly connected to one of the two groups of outlets in the first reversing valve (2). The other group of outlets of the first reversing valve (2) is fixedly connected to a return pipe (3). The end of the return pipe (3) away from the first reversing valve (2) is connected to a polyurethane glue supply barrel. The inlet of the first reversing valve (2) is fixedly connected to a first metering pump through the first feed pipe (1). The end of the first metering pump away from the first feed pipe (1) is fixedly connected to the polyurethane glue supply barrel. A drying joint (7), the drying joint (7) being fixedly connected to the right wall of the heat preservation box (5) and being located below the feed joint (6), and the end of the drying joint (7) away from the heat preservation box (5) being connected to the high-pressure hot air blower via a high-temperature resistant air pipe; a cleaning solvent connector (8), the cleaning solvent connector (8) being fixedly connected to the right wall of the heat preservation box (5) and being located below the drying connector (7); an end of the cleaning solvent connector (8) away from the heat preservation box (5) being fixedly connected to a second metering pump via a solvent pipeline; an end of the second metering pump away from the solvent pipeline being connected to a cleaning solvent supply barrel; A nozzle (9) for spraying polyurethane glue, the nozzle (9) being fixedly connected to the lower wall of the heat preservation box (5); the inner wall of the nozzle (9) being provided with a fan-shaped atomizing spray hole (19) for spraying the polyurethane glue in a fan shape; and a protective cover (11) being fixedly connected to the left wall of the nozzle (9); a heating pipe (32), the heating pipe (32) being fixedly connected to the lower wall of the inner side of the heat preservation box (5), the heating pipe (32) being spiral-shaped and the spiral lower end being connected to the nozzle (9), the end of the heating pipe (32) away from the nozzle (9) being connected to the feed joint (6) through the connecting pipe (31), the ends of the drying joint (7) and the cleaning solvent joint (8) facing the heat preservation box (5) both passing through the right wall of the heat preservation box (5) and both extending into the interior of the heat preservation box (5), and the ends of the drying joint (7) and the cleaning solvent joint (8) extending into the interior of the heat preservation box (5) both being connected to the connecting pipe (31); A heating structure for heating the heating tube (32), the heating structure being arranged on the inner wall of the heat preservation box (5); A temperature detection structure for detecting the internal temperature of the heat preservation box (5), wherein the temperature detection structure is arranged on the left wall of the heat preservation box (5); a blocking cover (20) for covering the nozzle (9), the blocking cover (20) being rotatably connected to the left wall of the nozzle (9) via a rotating structure, the blocking cover (20) being located below the protective cover (11), the lower wall of the blocking cover (20) being provided with a circular step, the inner diameter of the circular step being consistent with the outer diameter of the nozzle (9); A sealing structure used for sealing when the blocking cover (20) covers the nozzle (9), the sealing structure being arranged on the inner upper wall of the step; A driving structure for driving the rotating structure to move and thereby driving the blocking cover (20) to move, the driving structure being fixedly connected to the lower wall of the heat preservation box (5) and located on the left side of the nozzle (9), the driving structure being rotationally connected to the rotating structure via a connecting rod (24); A first negative pressure connector (10) and a second negative pressure connector (22), wherein the first negative pressure connector (10) and the second negative pressure connector (22) are respectively fixedly connected to the front wall of the nozzle (9) and the upper wall of the baffle (20), the first negative pressure connector (10) is connected to the interior of the nozzle (9), and the second negative pressure connector (22) is connected to the interior of the circular step of the baffle (20); An adsorption structure for sucking away waste glue and cleaning liquid inside the nozzle (9), the adsorption structure being arranged between the first negative pressure connector (10), the second negative pressure connector (22) and the negative pressure pump; The driving structure is an electric telescopic rod (12), the electric telescopic rod (12) being fixedly connected to the lower wall of the heat preservation box (5) and located on the left side of the nozzle (9), and the extension shaft of the electric telescopic rod (12) being rotatably connected to an end of the connecting rod (24) away from the rotating structure; The first reversing valve (2) switches to return the fed glue from the return pipe (3) to the polyurethane glue supply barrel, so that the glue flows back, and at the same time, the electric telescopic rod (12) drives the rotating structure to drive the blocking cover (20) to cover the nozzle (9).

2. The process for producing a breathable and moisture-permeable composite fabric according to claim 1, characterized in that: The heat-insulating structure is a heat-insulating layer (35), and the heat-insulating layer (35) is fixedly connected to the inner wall of the heat-insulating box (5).

3. The process for producing a breathable and moisture-permeable composite fabric according to claim 1, characterized in that: The heating structure is an electric heating module (33), the electric heating module (33) is fixedly connected to the inner lower wall of the heat preservation box (5), and one end of the electric heating module (33) away from the inner lower wall of the heat preservation box (5) extends into the spiral center of the spiral heating tube (32); The temperature detection structure is a temperature sensor (34), and the temperature sensor (34) is fixedly connected to the left wall of the thermal insulation box (5). One end of the temperature sensor (34) facing the thermal insulation box (5) penetrates the left wall of the thermal insulation box (5) and extends into the interior of the thermal insulation box (5).

4. The process for producing a breathable and moisture-permeable composite fabric according to claim 1, characterized in that: The rotating structure comprises a first rotating seat (25) and a second rotating seat (28); the first rotating seat (25) is fixedly connected to the left wall of the nozzle (9) and is located inside the protective cover (11); the second rotating seat (28) is fixedly connected to the upper wall of the blocking cover (20); a first swing arm (26) and a second swing arm (27) are rotatably connected in sequence from top to bottom on a side of the first rotating seat (25) away from the nozzle (9); a third swing arm (29) and a fourth swing arm (30) are rotatably connected in sequence from left to right on a side of the second rotating seat (28) away from the blocking cover (20); the first swing arm (26) is away from the first rotating seat (25). One end of the connecting rod (24) is rotatably connected to one end of the fourth swing arm (30) away from the second rotating seat (28) and one end of the connecting rod (24) away from the driving structure; the second swing arm (27) is rotatably connected to the fourth swing arm (30) at a central position in the length direction; one end of the second swing arm (27) away from the first rotating seat (25) is rotatably connected to one end of the third swing arm (29) away from the second rotating seat (28); the blocking cover (20) can obtain a 180-degree turning range through the first rotating seat (25), the second rotating seat (28), the first swing arm (26), the second swing arm (27), the third swing arm (29) and the fourth swing arm (30).

5. The process for producing a breathable and moisture-permeable composite fabric according to claim 1, characterized in that: The sealing structure is a sealing gasket (21), the sealing gasket (21) is fixedly connected to the upper wall of the inner side wall of the circular step of the blocking cover (20), and a through hole penetrating from top to bottom is provided at the center of the inner wall of the sealing gasket (21); The adsorption structure comprises a first suction pipe (13), a second suction pipe (14), and a waste liquid bottle (17); the first suction pipe (13) is fixedly connected to an end of the first negative pressure joint (10) away from the nozzle (9); the second suction pipe (14) is fixedly connected to an end of the second negative pressure joint (22) away from the blocking cover (20); an end of the first suction pipe (13) away from the first negative pressure joint (10) and an end of the second suction pipe (14) away from the second negative pressure joint (22) are fixedly connected to a second reversing valve (15); and the second reversing valve (15) is fixedly connected to the first negative pressure joint (10). 15) is fixedly connected to one end of the main suction pipe (16) away from the first suction pipe (13) and the second suction pipe (14); the waste liquid bottle (17) is fixedly connected to one end of the main suction pipe (16) away from the second reversing valve (15); a group of inlets and outlets are arranged on the waste liquid bottle (17); an inlet of the waste liquid bottle (17) is fixedly connected to an introduction pipe (23) extending toward the inside of the waste liquid bottle (17); the main suction pipe (16) is connected to the introduction pipe (23); and the outlet of the waste liquid bottle (17) is connected to a negative pressure pump via a negative pressure pipe (18).

6. The process for producing a breathable and moisture-permeable composite fabric according to claim 1, characterized in that: The breathable and moisture-permeable composite fabric comprises a composite surface fabric and an inner fabric: The surface fabric is formed by alternately interweaving silk fiber yarn as warp yarn, vitamin E viscose fiber modified yarn and polyester yarn as weft yarn; the warp density of the surface fabric is 1100 yarns / 10cm, the weft density is 450 yarns / 10cm, and the organization structure is 5-piece 3-fly satin; The inner layer fabric is made of collagen modified yarn and protein modified cotton yarn, and is woven by the front comb GB1 and the back comb GB2 of a single needle bed warp knitting machine; wherein the front comb GB1 performs chain yarn padding movement, and the back comb GB2 performs warp diagonal yarn padding movement.

7. A process for producing a breathable and moisture-permeable composite fabric according to claim 6, characterized in that: The fineness of the polyester yarn is 140-160 dtex, the fineness of the vitamin E viscose fiber modified yarn is 140-160 dtex, and the weft ratio of the vitamin E viscose fiber modified yarn to the polyester yarn is (1-3):

1.

8. The process for producing a breathable and moisture-permeable composite fabric according to claim 6, characterized in that: The vitamin E viscose fiber modified yarn is a viscose fiber loaded with core-shell structure vitamin E nanoparticles; The particle size of the core-shell structured vitamin E nanoparticles is 0.1-0.5 um.

9. The process for producing a breathable and moisture-permeable composite fabric according to claim 6, characterized in that: The protein-modified cotton yarn is made by adsorbing sericin on the surface of the fiber after finishing with a polycarboxylic acid finishing agent; The polycarboxylic acid finishing agent is citric acid.

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