Abdomen oriented warm-keeping fabric, preparation method thereof and application of abdomen oriented warm-keeping fabric in hip wrapping skirt

Abstract

The invention relates to the technical field of fabric processing, in particular to an abdomen oriented warm-keeping fabric, a preparation method thereof and application of the abdomen oriented warm-keeping fabric in a hip wrapping skirt, and the abdomen oriented warm-keeping fabric sequentially comprises a graphene layer capable of making contact with the skin, a fabric layer and a warm-keeping layer. The graphene layer takes a polyurethane resin glue solution as a substrate and is compounded with functional components such as graphene and diatomite and auxiliaries, so that the graphene layer is skin-friendly, non-inductive, breathable, anti-stuffy, uniform in heat conduction and stable in structure; the thermal insulation layer takes a polyurethane resin glue solution as a frame and is matched with a far infrared heating filler to form an absorption-conversion-release circulating heating mode, so that long-term directional thermal insulation is guaranteed. The polyurethane glue solution is prepared through a specific process, is soft, skin-friendly and stable in structure, can efficiently bear functional components, and avoids agglomeration and falling off. Through a three-layer collaborative design, the fabric is thin and warm-keeping, and can be independently sewn at the belly position of clothes to realize an invisible effect without changing the wearing habit of modern women.

Description

Technical Field

[0001] This application relates to the field of fabric processing technology, and more specifically, to an abdominal directional thermal insulation fabric, its preparation method, and its application in a bodycon skirt. Background Technology

[0002] With increased health awareness among contemporary women, the traditional Chinese medicine theory that "the abdomen is the palace of the five internal organs" and Western medicine's understanding of the significant impact of pelvic warmth on women's reproductive health and digestive function have become widely accepted. Surveys show that 78% of women of childbearing age experience abdominal coldness during menstruation, 65% of postpartum women are concerned about abdominal warmth and repair, and older women have an even more urgent need for abdominal warmth due to decreased metabolism. To improve warmth, the following three methods are commonly used to address this issue: Wearing thermal underwear is not ideal. Traditional thermal underwear covers the abdomen but is outdated, bulky, and stuffy. It is seriously out of touch with the fashionable dressing scenarios of modern women wearing it as an outer layer and inner layer. It cannot be matched with trendy items such as bodycon skirts, dresses, and low-waisted pants. It causes a sense of incongruity in various scenarios such as the workplace and social occasions. In addition, the static thermal design makes it easy to feel stuffy in indoor heating environments. Wearing thick skirts / trousers, which achieve warmth through physical stacking, can easily lead to a strong feeling of constriction in the waist and abdomen, poor moisture permeability, and limited movement, failing to meet the dynamic thermal and humidity regulation needs of indoor and outdoor temperature difference scenarios such as offices and commuting. Disposable products such as hand warmers are used, but their temperature is uncontrollable, they are very noticeable, pose safety hazards, have a heavy environmental burden, and have low integration with branded clothing, affecting the wearing experience. In conclusion, existing technologies have failed to resolve the structural contradictions between functional precision, wearing comfort, scene adaptability, and fashion compatibility in women's abdominal warmth products. There is an urgent need for a new technological solution that can achieve invisible and sustainable integration of abdominal warmth functions without changing modern women's established dressing habits. Summary of the Invention

[0003] In order to address the structural contradiction between functional precision, wearing comfort, scene adaptability and fashion compatibility that existing technologies have failed to resolve, this application provides an abdominal directional thermal insulation fabric and its preparation method, as well as its application in a bodycon skirt.

[0004] In a first aspect, this application provides a targeted abdominal thermal insulation fabric, which adopts the following technical solution: An abdominal directional thermal insulation fabric, comprising, in sequence, a graphene layer that comes into contact with the skin, a fabric layer, and a thermal insulation layer, wherein the graphene is prepared from the following raw materials in parts by weight: 100 parts of polyurethane resin liquid 4-8 parts of tackifier 3-10 parts of maleic anhydride-grafted silicone oil Epoxy soybean oil 5-15 parts Graphene 6-12 parts Diatomaceous earth 1-5 parts Crosslinking agent 1-3 parts Penetrating agent 0.5-2 parts Sodium carboxymethyl cellulose 0.5-1.5 parts The warm layer is prepared from the following raw materials by weight: Polyurethane resin glue 100 parts Tackifier 3-6 parts Maleic anhydride grafted silicone oil 2-5 parts Far infrared heating filler 10-20 parts Crosslinking agent 1-3 parts Penetrating agent 0.5-1.5 parts The maleic anhydride grafted silicone oil is prepared by reacting maleic anhydride with amino silicone oil.

[0005] By adopting the above technical scheme, the three layers of graphene layer, fabric layer and warm layer are synergized to obtain a fabric that is thin and warm. The structural contradiction between the functional precision, wearing comfort, scene adaptability and fashion compatibility of the existing female abdominal warming products is solved. The fabric can be sewn alone at the corresponding abdominal position, without affecting the structure of the clothing and without being bloated, and can realize the effect of invisibility, meet the dressing needs of multiple scenes such as the workplace, social interaction and commuting, and realize precise, comfortable and sustainable directional warming without changing the established dressing habits of modern women.

[0006] Among them, the graphene layer takes polyurethane resin glue as the base, under the viscosity adjustment of sodium carboxymethyl cellulose and the uniform dispersion of the penetrating agent, the functional components such as graphene and diatomaceous earth form a dense and uniform film structure, and the adhesion of the graphene layer and the fabric layer is greatly improved with the curing enhancement of the crosslinking agent. There is no peeling and wrinkling phenomenon after repeated rubbing and washing, and the structure stability is excellent. At the same time, the graphene is uniformly distributed under the action of the penetrating agent, constructing a continuous and efficient heat conduction channel, and the toughening modification of the base by the epoxy soybean oil not only ensures that the heat conduction efficiency is greatly improved compared with a single graphene coating, but also avoids the problem of insufficient fit caused by the rigidity of the coating; the lubrication modification of the maleic anhydride grafted silicone oil and the flexibility optimization of the epoxy soybean oil form a synergy, reducing the surface friction coefficient of the coating, and achieving a no-sense fit experience when the skin is in contact; the porous structure of diatomaceous earth forms a breathable path with the base, improving the breathability of the fabric, effectively avoiding the stuffy and sticky feeling after sweating, and the tackifier strengthens the dynamic fit between the coating and the human skin. Whether in dynamic scenes such as standing and walking or in static scenes such as sitting for a long time, it can tightly fit the abdomen without displacement, and finally realizes the technical effects of uniform heat conduction, no-sense skin, breathable and anti-stuffy, and stable and durable, providing reliable inner layer support for directional warming.

[0007] The warm-keeping layer polyurethane resin glue solution constructs a warm-keeping layer basic framework, guarantees structural strength and durability, far infrared heating fillers serve as the core, continuously absorb environmental heat energy and heat emitted by the human body and convert them into far infrared radiation heat to feedback to the abdomen, forming a circulation heating mode of absorption-conversion-release; the polyurethane resin glue solution can uniformly wrap the heating fillers to avoid agglomeration and falling off, the crosslinking agent and tackifier strengthen the bonding force of the far infrared heating fillers and the substrate, provide structural guarantee for continuous heating, and at the same time improve the bonding stability of the warm-keeping layer and the fabric layer, so that they do not fall off in the use process; the maleic anhydride grafted silicone oil optimizes the softness of the fabric to improve the fit and reduce heat loss, the penetrating agent promotes the deep fusion of each component to ensure uniform distribution of the heating performance, and together reduces heat loss, finally realizes long-term stable directional warm-keeping effect.

[0008] Preferably, the polyurethane glue solution is prepared by the following method: According to parts by weight, polyether polyol 15-20 parts, polyester polyol 10-20 parts and cosolvent 3-8 parts are added to water 30-50 parts, heated to 80-100℃ and stirred to dissolve uniformly, 2-8 parts of dihydroxyl-terminated polydimethylsiloxane and 0.01-0.05 parts of catalyst are added, stirring is maintained for 30-50 min, the temperature is lowered to 30-35℃, 8-15 parts of polyisocyanate and 3-5 parts of hydrophilic chain extender are added and stirred to dissolve uniformly, the temperature is raised to 50-60℃, 0.1-0.5 parts of hydrophilic chain extender is added again and stirring is continued for 20-30 min, the pH is adjusted to 6.5-7.5, and the polyurethane glue solution is obtained.

[0009] By adopting the above technical scheme, first, polyether polyol and polyester polyol are used as the basic system, and dihydroxyl-terminated polydimethylsiloxane is used to optimize the compatibility, then hydrophilic chain extender is added step by step, and the temperature and pH value are regulated, a substrate material with uniform stability, strong adhesion, and soft and skin-friendly structure stability is prepared, which can not only efficiently bear the functional components such as graphene in the graphene layer, diatomite and far infrared heating fillers in the warm-keeping layer, avoid the agglomeration or falling off of the components, guarantee the continuity of the synergistic effect of the functional components, but also give the fabric good ductility and moisture permeability, neither increase the bulky feeling of the fabric, nor reduce the restraint feeling in wearing, provide key substrate support for the invisible warm-keeping, comfortable fitting and long-term durability of the overall fabric, and further strengthen the comprehensive advantages of the abdominal directional warm-keeping fabric in function, comfort and fashion.

[0010] Preferably, the polyester polyol is composed of polydiethylene glycol adipate diol, polycaprolactone diol and polycaprolactone polyol according to a weight ratio of 1:(3-5):(5-9).

[0011] By adopting the above technical scheme, the polyethylene glycol adipate diol improves the skin-friendliness and moisture permeability of the system, the polycaprolactone diol enhances the flexibility and low-temperature adaptability of the polyurethane glue solution, and the high-proportion polycaprolactone polyol strengthens the structural stability of the glue solution and the bearing capacity of the functional filler, so that the comprehensive performance of the polyurethane glue solution is optimized, the polyurethane glue solution has excellent film-forming property, adhesion and durability, can stably bear the components such as graphene and far-infrared heating filler and avoid the components from falling off, has good softness and ductility, ensures that the subsequent fabric is not bulky and has no binding feeling, and the compatibility of the glue solution with other raw materials is improved, so that the overall fabric realizes invisible warmth, comfortable fitting and the like.

[0012] Preferably, the molecular weight of the dihydroxyl-terminated polydimethylsiloxane is 2000-5000, and the hydroxyl content is 6-12%.

[0013] By adopting the above technical scheme, the parameters of the dihydroxyl-terminated polydimethylsiloxane are optimized, the appropriate molecular weight not only ensures the softness and ductility of the glue solution, avoids the subsequent fabric from being stiff or bulky, but also forms good compatibility with raw materials such as polyether polyol and polyester polyol, the hydroxyl content of 6-12% can fully participate in the cross-linking reaction, strengthen the bonding force with polyisocyanate and hydrophilic chain extender, improve the film-forming stability and adhesion of the polyurethane glue solution, and then the glue solution can more stably bear the functional components such as graphene and far-infrared heating filler, reduce the aggregation or falling off of the components, and at the same time, the glue solution has excellent moisture permeability and wear resistance, which is beneficial to realize the technical effects of invisible warmth, comfortable fitting and long-term durability of the fabric.

[0014] Preferably, the far-infrared heating filler is prepared by the following method: The oxide filler is ground to 200-300 nm; The carbide filler is ground to 50-100 nm; The nitride filler is ground to 600-1000 nm; The oxide filler, the carbide filler, the nitride filler and the magnesium borate whisker are mixed according to the weight ratio (1-3):(3-5):(2-5):1, then ethanol and a silane coupling agent are added and stirred to obtain the far-infrared heating filler.

[0015] By adopting the above technical scheme, the fillers of different particle sizes form a dense packing structure, reducing the heat conduction gap and greatly improving the absorption efficiency of environmental heat and human heat. The small particle size characteristics of carbides enhance the heat conduction and heat absorption efficiency, oxides and nitrides improve the far infrared radiation conversion capability, magnesium borate whiskers optimize the dispersibility and structural stability of the fillers, and silane coupling agents greatly improve the compatibility of the fillers and the polyurethane glue solution, avoiding uneven heating caused by agglomeration, and finally enabling the fillers to have an efficient and stable absorption-conversion-release far infrared heating cycle, which not only guarantees the continuous warming effect of the warming layer, but also uniformly distributes in the fabric without increasing the bulky feeling, which is conducive to improving the directional warming, comfortable adaptability of the overall fabric.

[0016] Preferably, the maleic anhydride grafted silicone oil is prepared by the following method: Dissolve 50.0g of amino silicone oil in 80ml of toluene, heat to 80-85℃ to remove water, add maleic anhydride powder 5.4g in batches, control the temperature not to exceed 90℃, add acetic acid catalyst 0.5g, heat to 105-110℃ to reflux, after the reaction is completed, remove the solvent by distillation under reduced pressure, to obtain maleic anhydride grafted silicone oil.

[0017] By adopting the above technical scheme, the maleic anhydride grafted silicone oil with high grafting rate, uniform structure and no solvent residue can be stably prepared, which can be deeply integrated with polyurethane glue solution, graphene, far infrared heating filler and other raw materials without agglomeration, and also retains the soft and smooth nature of silicone oil, which can effectively optimize the skin-friendly touch of the graphene layer, reduce skin friction irritation, and improve the flexibility of the warming layer, avoiding fabric stiffness.

[0018] Preferably, the adhesion promoter is a silane-based adhesion promoter.

[0019] By adopting the above technical scheme, the silane-based promoter can strengthen the bonding force of the functional components such as graphene and far infrared heating filler to the polyurethane glue solution substrate through chemical bonding, which not only guarantees the structural stability of the graphene layer and the warming layer, reduces the loss of components in daily wear, prolongs the service life of the fabric, but also does not affect the softness and moisture permeability of the fabric, ensuring that the layers do not interfere with each other when playing the functions of skin-friendly, heating and warming, and other components supporting the invisible warming, comfortable adaptability of the overall fabric.

[0020] Preferably, the penetrating agent is composed of penetrating agents BYK-6798 and RR-SF-102 in a weight ratio of 1:(2-4).

[0021] By adopting the above technical scheme, the type and amount of penetrating agent are optimized, the penetration and fusion efficiency of each component is further improved, the functional fillers are deeply combined with the substrate, and the performance unevenness caused by local agglomeration is avoided. At the same time, the softness and moisture permeability of the fabric are not damaged, and the functions of the graphene layer and the warming layer are stably played.

[0022] In a second aspect, the application provides a preparation method of the abdominal directional thermal fabric, which adopts the following technical scheme: The preparation method of the abdominal directional thermal fabric comprises the following preparation steps: Preparation of coating A: uniformly mix polyurethane resin glue, tackifier, maleic anhydride grafted silicone oil, epoxy soybean oil, graphene, diatomite, crosslinking agent, penetrating agent and sodium carboxymethyl cellulose to obtain coating A; Preparation of coating B: uniformly mix polyurethane resin glue, tackifier, maleic anhydride grafted silicone oil, far-infrared heating filler, crosslinking agent and penetrating agent to obtain coating B; Preparation of finished product: coating A is coated on the surface of the fabric, dried, coating B is coated on the other surface of the fabric, dried, and a thermal fabric is obtained.

[0023] By adopting the above technical scheme, the raw material ratio of the graphene layer and the thermal layer is controlled by separately preparing coating A and coating B, the interference of mixing different functional components is avoided, the targeted functions of skin-friendly and continuous thermal conduction of each layer are ensured, the layered structure of the graphene layer, the fabric layer and the thermal layer is directly constructed by double-sided directional coating, the complex compounding process is not needed, the production process is simplified, the functional layer is closely attached to the fabric, and the layered separation is avoided, step-by-step drying allows each layer of coating to be fully solidified, the interlayer adhesion and structural stability are improved, and the uniformity and continuity of the synergistic effect of each component are ensured. The overall process is efficient and controllable, the original softness and adaptability of the fabric are not damaged, the functional advantages of each layer are maximized, and reliable process protection is provided for the final fabric to realize invisible, comfortable, sustainable directional thermal and fashionable compatible characteristics.

[0024] In a third aspect, the application provides an application of the abdominal directional thermal fabric, which adopts the following technical scheme: The application of the abdominal directional thermal fabric is used for hip-hugging skirts and trousers, and the abdominal directional thermal fabric is the abdominal directional thermal fabric of the first aspect or is prepared by the preparation method of the abdominal directional thermal fabric of the second aspect.

[0025] By adopting the above technical scheme, the abdominal directional thermal fabric is applied to hip-hugging skirts and trousers, and invisible abdominal directional thermal is realized without changing the existing wearing habits. The layered synergistic design avoids the bloated feeling of traditional thermal products, perfectly adapts to the fit tailoring of hip-hugging skirts and the activity of trousers. The fabric has softness, air permeability and structural stability, does not restrict the limb movement and does not affect the fashionable appearance of clothes, is compatible with multiple scenes such as office and commuting, completely solves the pain point that fashionable lower garments and abdominal thermal are difficult to be considered together, and realizes the efficient unification of fashionable dressing and healthy thermal.

[0026] To sum up, the application has the following beneficial effects: 1、The application solves the structural contradiction of the existing products in the functional precision, wearing comfort, scene adaptability and fashion compatibility through the synergistic design of the three layers of the graphene layer, the fabric layer and the warm layer, realizes the invisible, sustainable and directional warmth without changing the modern women's dressing habits. It can be sewn alone in the abdominal position of the clothing, without damaging the clothing structure and fashion sense, and is suitable for multiple scenes such as office, socializing and commuting. The graphene layer uses polyurethane resin glue as the base, under the action of sodium carboxymethyl cellulose and penetrant, makes the components such as graphene and diatomite uniformly dispersed and forms a dense film, cooperates with crosslinking agent to enhance the adhesion, and after washing and rubbing, there is no falling and wrinkling, and the structural stability is excellent; the graphene constructs an efficient heat conduction channel, the epoxy soybean oil improves the toughness of the coating, the maleic anhydride grafted silicone oil optimizes the lubricity, and the two realize the skin-friendly and inapparent adhesion; the porous structure of diatomite guarantees the air permeability and prevents stuffiness, the tackifier strengthens the dynamic adhesion, and the inner layer support effect of uniform heat conduction, air permeability, prevention of stuffiness and stability is achieved. The warm layer uses polyurethane resin glue as the frame, the far infrared heating filler forms a cycle heating mode of absorption-transformation-release, cooperates with crosslinking agent and tackifier to strengthen the stability of the filler and the base and the fabric layer, and the maleic anhydride grafted silicone oil and penetrant cooperate to improve the adhesion and ensure uniform heating, reduce heat loss, realize long-term stable directional warmth, and finally achieve the unity of precise, comfortable and sustainable abdominal warmth and fashionable dressing. DETAILED DESCRIPTION

[0027] Preparation Example 1 A polyurethane glue solution is prepared by the following method: Polyether polyol 150g (polytetrahydrofuran diol), polyester polyol 100g and cosolvent 30g (acetone) are added to water 300g portions, heated to 80℃ and stirred to dissolve uniformly, double-hydroxyl terminated polydimethylsiloxane 2g and catalyst 0.1g (stannous octoate) are added, stirring is maintained for 30min, the temperature is lowered to 30℃, then polyisocyanate 80g (2,2,4-trimethylhexamethylene diisocyanate) and hydrophilic chain extender 30g (ethylenediamine) are added and stirred to dissolve uniformly, the temperature is raised to 50℃, then hydrophilic chain extender 1g (ethylenediamine) portions are added again and continue to stir for 20min, the pH is adjusted to 6.5, and a polyurethane glue solution is obtained.

[0028] The polyester polyol is composed of polyhexanedioic acid one-diethylene glycol ester diol with a molecular weight of 2000, poly-caprolactone diol with a molecular weight of 1500 and poly-caprolactone polyol with a molecular weight of 1000 in a weight ratio of 1:3:5; The double-hydroxyl terminated polydimethylsiloxane has a molecular weight of 2000 and a hydroxyl content of 6%; Preparation Example 2-3 is different from Preparation Example 1 in that the types, amounts and parameters of raw materials for preparing the polyurethane glue solution are different, and the specific differences are shown in Table 1. Table 1 Types, amounts and parameters of raw materials for preparing the polyurethane glue solution

[0029] Preparation Example 4 A far infrared heating filler is prepared by the following method: Grind the oxide filler 2.5g (alumina) to 200nm; Grind the carbide filler 7.5g (zirconium carbide) to 50nm; Grind the nitride filler 5g (zirconium nitride) to 600nm; Mix the oxide filler, carbide filler, nitride filler and magnesium borate whisker 2.5g according to the weight ratio of 1:3:2:1, then add ethanol 50ml and silane coupling agent 3g (KH-550) and stir to obtain the far infrared heating filler.

[0030] Preparation Example 5 A far infrared heating filler is prepared by the following method: Grind the oxide filler 5g (yttrium oxide) to 250nm; Grind the carbide filler 10g (silicon carbide) to 80nm; Grind the nitride filler 10g (zirconium nitride) to 800nm; Mix the oxide filler, carbide filler, nitride filler and magnesium borate whisker 2.5g according to the weight ratio (1-3):(3-5):4:1, then add ethanol 50m and silane coupling agent 5g (γ-aminopropyl triethoxysilane) and stir to obtain the far infrared heating filler.

[0031] Preparation Example 6 A far infrared heating filler is prepared by the following method: Grind the oxide filler 7.5g (yttrium oxide) to 300nm; Grind the carbide filler 12.5g (zirconium carbide) to 100nm; Grind the nitride filler 12.5g (zirconium nitride) to 1000nm; Mix the oxide filler, carbide filler, nitride filler and magnesium borate whisker 2.5g according to the weight ratio of 3:5:5:1, then add ethanol 50m and silane coupling agent 4g (γ-glycidyl ether propyl trimethoxysilane) and stir to obtain the far infrared heating filler.

[0032] Preparation Example 7 A maleic anhydride grafted silicone oil is prepared by the following method: Amino silicone oil was purchased from Macklin, with the item number A909718 and CAS number 63148-62-0.

[0033] Amino silicone oil was purchased from Macklin, with the item number A909718 and CAS number 63148-62-0.

[0034] Preparation Example 7 A maleic anhydride grafted silicone oil was prepared by the following method: Amino silicone oil was purchased from Macklin, with the item number A909718 and CAS number 63148-62-0.

[0035] Amino silicone oil was purchased from Macklin, with the item number A909718 and CAS number 63148-62-0.

[0036] Example Epoxy soybean oil was purchased from Shandong Xinheng Chemical Co., Ltd., with an epoxy value ≥ 6.0.

[0037] Example 1 An abdomen directional thermal fabric was prepared by the following method: Preparation of coating A: 100 g of polyurethane resin glue (from Preparation Example 1), 4 g of adhesion promoter (γ-aminopropyl triethoxysilane), 3 g of maleic anhydride grafted silicone oil, 5 g of epoxy soybean oil, 6 g of graphene, 1 g of diatomite, 1 g of crosslinking agent (hexamethylene diisocyanate trimer), 0.5 g of penetrating agent, and 0.5 g of sodium carboxymethyl cellulose were uniformly mixed to obtain coating A; Preparation of coating B: 100 g of polyurethane resin glue, 4 g of adhesion promoter (γ-aminopropyl triethoxysilane), 3 g of maleic anhydride grafted silicone oil, 10 g of far infrared heating filler, 1 g of crosslinking agent (hexamethylene diisocyanate trimer), and 0.5 g of penetrating agent were uniformly mixed to obtain coating B; Preparation of finished product: coating A was coated on the surface of the fabric, dried, coating B was coated on the other surface of the fabric, and dried to obtain the thermal fabric.

[0038] Example 2-3 was different from example 1 in that the types, amounts, and parameters of the raw materials for preparing the thermal fabric were different, and the specific differences were shown in Table 2: Table 2 Types, amounts, and parameters of raw materials for preparing thermal fabric Embodiment

[0039] An abdomen-oriented thermal fabric, different from embodiment 1 is that the polyester polyol in the polyurethane glue solution is composed of polyethylene adipate diol with a molecular weight of 2000 and polycaprolactone diol with a molecular weight of 1500 at a weight ratio of 1:3.

[0040] Embodiment 5 An abdomen-oriented thermal fabric, different from embodiment 1 is that the polyester polyol in the polyurethane glue solution is polycaprolactone polyol with a molecular weight of 1000.

[0041] Embodiment 6 An abdomen-oriented thermal fabric, different from embodiment 1 is that the average particle size of aluminum oxide, zirconium carbide and zirconium nitride in the far infrared heating filler is 200 nm.

[0042] Embodiment 7 An abdomen-oriented thermal fabric, different from embodiment 1 is that the average particle size of aluminum oxide in the far infrared heating filler is 50 nm.

[0043] Embodiment 8 An abdomen-oriented thermal fabric, different from embodiment 1 is that the oxide filler, carbide filler, nitride filler and magnesium borate whisker 2.5 g in the far infrared heating filler are mixed at a weight ratio of 1:1:2:1.

[0044] Embodiment 9 An abdomen-oriented thermal fabric, different from embodiment 1 is that only the oxide filler, carbide filler and nitride filler are mixed at a weight ratio of 1:3:2 in the far infrared heating filler.

[0045] Embodiment 10 An abdomen-oriented thermal fabric, different from embodiment 1 is that the penetrating agent is penetrating agent BYK-6798.

[0046] Comparative example Comparative example 1 An abdomen-oriented thermal fabric, different from embodiment 1 is that the polyurethane resin glue solution is replaced by an acrylate resin solution.

[0047] The acrylate resin solution is purchased from Shanghai Baolijia Chemical Co., Ltd., and the model is BLJ-716.

[0048] Comparative example 2 An abdomen-oriented thermal fabric, the difference between the present example and example 1 is that the maleic anhydride grafted silicone oil is replaced by amino silicone oil.

[0049] Comparative Example 3 An abdomen-oriented thermal fabric, the difference between the present example and example 1 is that the maleic anhydride grafted silicone oil is replaced by amino silicone oil. Comparative Example 4 An abdomen-oriented thermal fabric, the difference between the present example and example 1 is that the maleic anhydride grafted silicone oil is replaced by amino silicone oil.

[0050] Detection method / test method Thermal retention rate test: according to GB / T 11048 standard, the thermal retention rate and thermal resistance value of the fabric are determined.

[0051] Air permeability test: according to GB / T 5453 standard, the air permeability is determined.

[0052] Moisture permeability test: according to GB / T 12704, the moisture permeability is determined.

[0053] Rubbing test: according to AATCC 61-2013 standard, simulate water washing and rubbing, after multiple water washing, observe whether the graphene layer and the thermal layer fall off, if fall off, record the number of water washing, more than 500 times is.

[0054] Skin friendliness test: according to ASTM D3108-2013 "standard test method for friction coefficient between fabrics and skin", using Labthink FTT-03 fabric surface performance tester, with standard silicone skin simulator as the opposite material, test the dynamic friction coefficient. Judgment standard: dynamic friction coefficient <0.3 is low friction, good skin friendliness; 0.3-0.5 is medium. The experimental data are shown in table 3: Table 3 experimental data of examples 1-10 and comparative examples 1-4

[0055] From the data in the experimental table, it can be seen that through the three-layer synergistic design of graphene layer, fabric layer and thermal layer, the present application realizes excellent thermal effect, and has excellent wearing comfort and structural stability. The fabric has good thermal performance, and good air permeability and moisture permeability, effectively solving the problem of stuffiness and stickiness; innovative raw materials such as polyurethane glue solution system and maleic anhydride grafted silicone oil are used, so that the functional layer does not fall off and wrinkle after repeated rubbing and washing, showing excellent durability; the skin friendliness test shows that the friction coefficient of the coating surface is low, and there is no sticky and painful feeling on the skin, realizing the comfortable experience of no feeling.

[0056] Compared with Example 1 and Comparative Examples 1-4, it is illustrated that by using the polyurethane resin glue solution system, maleic anhydride grafted silicone oil, epoxy soybean oil and sodium carboxymethyl cellulose in combination, the abdominal directional thermal insulation fabric can simultaneously have good thermal insulation, air and moisture permeability, wearing comfort and structural stability.

[0057] Compared with Example 1 and Examples 4-5, it is illustrated that the use of polyester polyol, polyethylene glycol adipate diol, polycaprolactone diol and polycaprolactone polyol in combination is beneficial to maintaining the thermal insulation, skin-friendly, air and moisture permeability and durability of the fabric.

[0058] Compared with Example 1 and Examples 6-9, it is illustrated that the technical solution of forming a dense packing structure by using oxides, carbides and nitrides with a specific particle size, and supplementing magnesium borate whiskers to optimize the dispersion stability, is the key to realizing efficient heat absorption, continuous far infrared conversion and thermal insulation effect.

[0059] Compared with Example 1 and Example 10, it is illustrated that the composite penetrating agent promotes the deep and uniform dispersion of functional components and optimizes the micro-pore structure of the fabric through synergistic effect, thereby better solving the problem of stuffiness and stickiness on the basis of ensuring thermal insulation, and realizing the dual optimization of comfort and functionality.

[0060] The specific embodiments are only an explanation of the present application, and are not a limitation of the present application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the specification, as long as the modifications are within the scope of the claims of the present application.

Claims

1. A directional thermal insulation fabric for the abdomen, characterized in that, The fabric comprises, in sequence, a graphene layer that comes into contact with the skin, a fabric layer, and a thermal insulation layer, wherein the graphene is prepared from the following raw materials in parts by weight: 100 parts of polyurethane resin liquid 4-8 parts of tackifier 3-10 parts of maleic anhydride-grafted silicone oil 5-15 parts of epoxidized soybean oil 6-12 parts of graphene 1-5 parts diatomaceous earth 1-3 parts crosslinking agent Penetrant 0.5-2 parts Sodium carboxymethyl cellulose 0.5-1.5 parts The insulation layer is prepared from the following raw materials in parts by weight: 100 parts of polyurethane resin liquid 3-6 parts of tackifier 2-5 parts maleic anhydride-grafted silicone oil 10-20 parts of far-infrared heating filler 1-3 parts crosslinking agent Penetrant 0.5-1.5 parts The maleic anhydride-grafted silicone oil is prepared by reacting maleic anhydride with amino silicone oil.

2. The abdominal directional thermal insulation fabric according to claim 1, characterized in that, The polyurethane adhesive is prepared by the following method: By weight, 15-20 parts of polyether polyol, 10-20 parts of polyester polyol, and 3-8 parts of cosolvent are added to 30-50 parts of water and heated to 80-100℃ while stirring until dissolved. Then, 2-8 parts of dihydroxy-terminated polydimethylsiloxane and 0.01-0.05 parts of catalyst are added and stirred for 30-50 minutes. The temperature is then lowered to 30-35℃, and 8-15 parts of polyisocyanate and 3-5 parts of hydrophilic chain extender are added and stirred until dissolved. The temperature is then raised to 50-60℃, and 0.1-0.5 parts of hydrophilic chain extender are added again and stirring is continued for 20-30 minutes. The pH is adjusted to 6.5-7.5 to obtain the polyurethane adhesive.

3. The abdominal directional thermal insulation fabric according to claim 2, characterized in that: The polyester polyol is composed of poly(diethylene adipate diol), polycaprolactone diol, and polycaprolactone polyol in a weight ratio of 1:(3-5):(5-9).

4. The abdominal directional thermal insulation fabric according to claim 2, characterized in that: The dihydroxyl-terminated polydimethylsiloxane has a molecular weight of 2000-5000 and a hydroxyl content of 6-12%.

5. The abdominal directional thermal insulation fabric according to claim 1, characterized in that, The far-infrared heating filler is prepared by the following method: The oxide filler was ground to 200-300 nm. Grind the carbide filler to 50-100 nm; The nitride filler was ground to 600-1000 nm; Oxide filler, carbide filler, nitride filler and magnesium borate whiskers are mixed in a weight ratio of (1-3):(3-5):(2-5):1, and then ethanol and silane coupling agent are added and stirred to obtain far-infrared heating filler.

6. The abdominal directional thermal insulation fabric according to claim 1, characterized in that, The maleic anhydride-grafted silicone oil is prepared by the following method: Dissolve 50.0g of amino silicone oil in 80ml of toluene, heat to 80-85℃ to dehydrate, add 5.4g of maleic anhydride powder in batches, control the temperature not to exceed 90℃, add 0.5g of acetic acid catalyst, heat to 105-110℃ and reflux reaction, after the reaction is completed, remove the solvent by vacuum distillation to obtain maleic anhydride grafted silicone oil.

7. The thermal insulation fabric according to claim 1, characterized in that: The tackifier is a silane-based adhesion promoter.

8. The abdominal directional thermal insulation fabric according to claim 1, characterized in that: The penetrant is composed of penetrant BYK-6798 and RR-SF-102 in a weight ratio of 1:(2-4).

9. A method for preparing an abdominal directional thermal insulation fabric as described in any one of claims 1-8, characterized in that, The preparation steps include the following: Preparation of coating A: Polyurethane resin liquid, tackifier, maleic anhydride grafted silicone oil, epoxidized soybean oil, graphene, diatomaceous earth, crosslinking agent, penetrant and sodium carboxymethyl cellulose are mixed evenly to obtain coating A; Preparation of coating B: Polyurethane resin adhesive, tackifier, maleic anhydride grafted silicone oil, far-infrared heating filler, crosslinking agent and penetrant are mixed evenly to obtain coating B; Preparation of finished product: Apply coating A to the surface of the fabric and dry it. Then apply coating B to the other surface of the fabric and dry it to obtain the thermal insulation fabric.

10. An application of an abdominal directional thermal insulation fabric, characterized in that: The part-oriented thermal insulation fabric is used in bodycon skirts and trousers, and the part-oriented thermal insulation fabric is the part-oriented thermal insulation fabric according to any one of claims 1-8 or is prepared by the method of preparing the part-oriented thermal insulation fabric according to claim 9.

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