CN1103385C - Autoamtic temp-regulating fibre and its products - Google Patents

Abstract

The invention relates to an automatic temperature-regulating fiber and its products. It is characterized in that the heat-storage microcapsule is used as the functional additive component of the self-regulating fiber, and the conventional fiber-forming polymer is used as the base material. Thermal microcapsules refer to a phase-change substance with a melting temperature of 20-50°C, a crystallization temperature of 30-5°C, a heat of fusion and a heat of crystallization ≥ 200J/g as the capsule core, and its weight accounts for 30% of the total weight of the thermal storage microcapsules. 40-80%; with styrene-divinylbenzene copolymer, triacrylic amine, urea-formaldehyde resin, epoxy resin or calcium silicate as the capsule wall, synthesized by in-situ polymerization; its diameter is 0.1-20 μm. The fibers and products can automatically adjust their own temperature in two directions as the ambient temperature changes.

Description

Self-regulating fiber and its products

The present invention relates to functional fiber and its product, specifically a fiber with heat energy absorption, storage and release function and its product. The fiber or product can automatically adjust its own temperature in two directions as the ambient temperature changes. The international patent classification number is proposed to be D01F 1/10.

Studies have shown that when in thermal equilibrium, the most comfortable skin temperature for the human body is 33.4°C; when the difference between the skin temperature of any part of the body and the average skin temperature is 1.5-3.0°C, the human body feels neither cold nor hot; if the temperature difference exceeds ±4.5°C , the human body will feel warm and cold. Therefore, when the temperature of the external environment is too low, or the body is in a relatively low temperature environment for too long, if the thermal insulation resistance of the clothing material is insufficient, the body temperature will drop quickly, and it is easy to catch a cold, frostbite or other diseases. In lifesaving science, the rectal temperature of 35°C is the threshold for deep body temperature drop. Serious dysfunction will occur if it is lower than 35°C. At this time, the human body is in a semi-conscious state and loses its ability to respond to the external environment. , heat preservation is very important to the human body. Conversely, in summer or tropical or some special working environment, when the external environment temperature is too high, if the thermal resistance of the clothing material is too large, the human body cannot lose heat as quickly as possible through sensible heat transfer, but can only maintain normal body temperature through a large amount of perspiration. Maintaining this state for a long time will cause excessive water loss in the body, disorder of body temperature regulation, lead to heat stroke, and even death. Therefore, it is also very important to cool down in time when you are in a high temperature environment.

Traditional clothing or textiles are generally composed of natural fibers such as cotton, hemp, silk, wool, etc., or/and chemical fiber materials such as viscose, polyester, nylon, and acrylic fibers. These fiber materials mainly play the role of maintaining the normal temperature of the human body in the clothes by blocking the heat transfer between the human body and the external environment, that is, heat radiation, heat conduction and heat convection. When the temperature of the external environment is lower than the skin surface temperature of the human body, it is only necessary to increase the clothing or textiles in time, that is, to increase the thermal resistance of the fiber material to reduce the heat exchange between the human body and the external environment, thereby maintaining the normal body temperature of the human body; when the external environment temperature When changing from below to close to body temperature, it is necessary to reduce clothing or textiles in time, that is, to reduce the thermal resistance of fiber materials, so as to increase the heat exchange between the human body and the environment. Therefore, timely and appropriate increase or decrease of clothing is the main means to keep body temperature constant. However, when the temperature difference varies greatly during a day, people often cannot do this due to subjective reasons or objective conditions, especially in the fast-paced modern life. When the ambient temperature is higher than the body temperature (the temperature in the clothing is higher than the body temperature), the human body can no longer lose heat through general heat radiation, heat convection and heat conduction, but must sweat a lot through the skin, and use the evaporation of sweat to take away heat ( The amount of heat taken away by vaporized sweat is several times that of liquid sweat), in order to maintain a constant body temperature, it is meaningless to take off even all the clothes, not to mention that under normal circumstances, taking off too much clothes is not allowed in public life of. The price is excessive loss of body fluids, disordered balance of the body, decline in physical fitness, feeling unwell, and disease.

In order to improve the temperature of the living environment, various functional textiles have been invented. In the 1960s, a textile coated with aluminum-titanium alloy foil was developed to reflect the far-infrared rays emitted by the human body, commonly known as "space cotton" thermal insulation material, which was widely developed and used in China in the 1980s. Another example is the "Toray Thermal" fiber, which generates heat after the micro-conductive material is energized, which can significantly improve the heat preservation effect. It contains iron micropowder, and the chemical reaction exothermic fiber that uses its oxidation and heat release has also been developed abroad. Japanese Patent Publication No. 3-3202 discloses a solar thermal storage fiber containing zirconium carbide micropowder that absorbs near-infrared heat release, which can significantly increase the internal temperature of the fabric under sunlight. Chinese invention patent CN1123850A discloses a composition and manufacturing method of a fiber that absorbs and emits far-infrared rays, which can absorb far-infrared rays emitted by the human body and convert them into heat to improve the heat preservation effect. Japanese Laid-Open Patent Publication No. 5-117910 discloses a fiber that reflects thermal radiation in sunlight and shields ultraviolet rays, and its fabric can reduce the internal temperature. But all these fiber material textiles only have one-way temperature adjustment function, that is, they can only improve the thermal insulation effect, or reduce the temperature inside the clothing to a certain extent, but cannot improve the thermal insulation function of the fiber material and reduce the thermal resistance of the fiber material. Effect, especially can not improve or reduce the thermal insulation effect of fiber material according to the needs of the human body, that is, there is no two-way temperature regulation function or effect.

Textiles with two-way temperature-regulating function are new topics in the world's fiber material research in the 1980s, especially in the 1990s. For example, U.S. Patent No. 4,871,615 discloses a method of filling the hollow fiber with inorganic hydrated salt or plastic crystal material by impregnation to prepare a fiber with temperature regulation function, but this fiber is neither washable nor durable. The crystal water in the hydrated salt will evaporate during the temperature rise and fall process, so that the fiber loses its temperature regulation function. For another example, the applicant's Chinese invention patent ZL96105229.5 discloses a polymer that uses polyether, aliphatic polyester, polyester ether, etc. as the main component of the core or island component of the fiber, and uses the fiber-forming polymer as the sheath component Or sea ingredients, the method of preparing fibers with automatic temperature regulation function through melt composite spinning. However, this method is only suitable for the manufacture of fibers with polymers as core or island components. For organic substances with lower melt viscosity, such as n-dodecanoic acid, n-tridecyl alcohol, n-tetradecyl alcohol, n-pentadecanol, n-hexadecanol Alcohol, n-hexadecane, n-heptadecane, n-octadecane, n-nonadecane, n-eicosane, n-hexadecane, n-docosane, etc. are not suitable, because these organic substances will During the process, it escapes from the sheath or sea component of the fiber, making the spinning process difficult.

The object of the present invention is to provide a self-regulating temperature fiber and its products made by heat storage microcapsule technology. It can use organic phase-change substances as functional additives, and can be produced by general spinning and textile processes. It has better functions of automatically absorbing, storing and releasing heat according to changes in ambient temperature.

The fiber of the present invention and its products are different from conventional fibers and their products. The biggest feature is that when the ambient temperature is high, it can absorb the heat of the environment and store it inside the fiber, so that the internal temperature of the fiber is lower than that of conventional fibers; When the temperature is low, the energy stored in the fiber can be released, so that the internal temperature of the fiber is higher than that of conventional fibers. The automatic temperature adjustment function of the fiber of the present invention makes the clothing processed by this fiber have better wearing comfort than ordinary clothing; when used in interior decoration materials, the indoor temperature fluctuation range can be relatively reduced, creating a more suitable environment for people's lives. and working environment.

The purpose of the present invention is achieved in this way: design a kind of automatic temperature-regulating fiber with automatic heat absorption, storage and heat release function according to the change of ambient temperature, it is characterized in that described automatic temperature-regulating fiber is based on heat storage microcapsules Functional additives, using conventional fiber-forming polymers as the base material, the weight ratio of heat storage microcapsules to fiber-forming polymers is 30-80:70-20, and it is made by conventional spinning technology; the heat storage Microcapsules refer to the phase-change material with a melting temperature of 20-50°C, a crystallization temperature of 30-5°C, and a heat of fusion and crystallization ≥ 200J/g as the capsule core, and the weight of the phase-change material should account for the total heat storage microcapsules. 40-80% by weight; using styrene-divinylbenzene copolymer, tripolynitrile amine, urea-formaldehyde resin, epoxy resin or calcium silicate as the capsule wall, synthesized by in-situ polymerization; the heat storage microcapsules The diameter is 0.1-20 μm.

Compared with the prior art, the automatic temperature-regulating fiber of the present invention is designed with advanced thermal storage microcapsule technology, and uses organic matter instead of polymer as a phase change substance, so that the source of raw materials is wider, and because the organic matter is more efficient than the prior art The polymer used has a greater heat of phase change, so the temperature self-regulation function of the fiber and its products is better. In addition, the present invention can be produced by the general spinning process, without adopting the relatively complex composite spinning process used in the prior art, so that the production is simpler.

The main feature of the design of the invention is the technology of making automatic temperature-regulating fibers by utilizing heat storage microcapsules. It uses a phase-change substance with a melting temperature of 20-50°C, a crystallization temperature of 30-5°C, and a heat of fusion and crystallization ≥ 200J/g as the capsule core, and the weight of the phase-change substance should account for 10% of the total weight of the heat storage microcapsules. 40-80%; styrene-divinylbenzene copolymer, triacrylic amine, urea-formaldehyde resin, epoxy resin or calcium silicate as the capsule wall, synthesized by in-situ polymerization. And the diameter of the heat storage microcapsules should be controlled between 0.1-20 μm. When the thermal storage microcapsules are made into self-temperature-regulating fibers and their products in a suitable way, the fibers and their products containing the above thermal storage microcapsules can absorb the environment when the ambient temperature is higher than the melting temperature of the phase change substance. The heat in the heat storage makes the phase change material in the thermal storage microcapsules gradually change from solid to liquid to store the heat; when the ambient temperature is lower than the crystallization temperature of the phase change material, the phase change material in the thermal storage microcapsules gradually From liquid to solid, the stored heat is released, so as to achieve the purpose of automatic temperature regulation. The so-called automatic temperature-regulating fiber and its products refer to the fiber and its products that can automatically absorb or release heat according to the change of ambient temperature, and automatically adjust the ambient temperature in two directions.

The phase-change material (PCM) in the thermal storage microcapsules of the present invention should use a phase-change material with a melting temperature of 20-50°C, a crystallization temperature of 30-5°C, and a heat of fusion and crystallization ≥ 200J/g as the capsule core. This is a specific choice in consideration of the use environment, purpose and performance requirements of the self-temperature-regulating fiber and its products, or in other words, the need to achieve the purpose of the present invention. The content of the PCM should account for 40-80% of the total weight of the capsule; more preferably 50-80%. If the content of the phase-change substance is lower than 40%, the heat-absorbing and releasing heat of the heat-storing microcapsules is small, and it is difficult to meet practical requirements. Repeated research results show that the content of phase-change substances can reach about 80%. If the content of the phase-change substance continues to increase, the strength of the capsule wall will be too low, and leakage will easily occur during use, which will affect the stability of the fiber performance and the effect of heat absorption and release functions.

The phase change substance used as the capsule core in the present invention is n-dodecanoic acid, n-tridecyl alcohol, n-tetradecyl alcohol, n-pentadecanol, n-hexadecanol, n-hexadecane, n-heptadecane, n-octadecane , n-nonadecane, n-eicosane, n-hecodecane, and n-docosane; the capsule wall is styrene-divinylbenzene copolymer, melamine, urea-formaldehyde resin, One of epoxy resin or calcium silicate.

The present invention adopts organic matter as phase-change material compared with prior art adopting polymer as phase-change material, has wider selectivity, and the absorption and heat release of these organic matter are compared with polyether, fatty acid used in prior art The heat absorption and heat release of family polyesters and polyester ethers are larger. For example, when tested by differential thermal analysis, the phase transition temperature and phase transition heat of several typical organic compounds and polymers are shown in Table 1.

Table 1 Phase transition temperature and phase transition heat of several typical organic compounds and polymers Substance name molecular weight Crystallization temperature °C Crystallization heat J/g Melting temperature °C Heat of fusion J/g Tetradecyl Alcohol 214 28.25 210.41 42.66 220.11 n-eicosane 282 29.39 231.37 43.88 205.01 n-Hexacane 296 27.00 233.88 42.36 239.02 polyethylene glycol 1000 12.74 134.64 35.10 137.31 polytetramethylene glycol 3000 21.52 87.32 23.76 92.29 Polyethylene Terephthalate - Polyethylene Glycol 23000 23.28 30.27 31.43 30.42 polybutylene glutarate -11.80 48.70 36.30 62.40 Polypropylene Sebacate 14.40 59.50 46.60 89.50

In order to prevent overheating melting or supercooling crystallization in the present invention, the capsule core material also contains an overheating melting and supercooling crystallization preventing agent with a weight of 1-10% of the phase change substance. The anti-superheat melting and supercooling crystallization agent is at least one of organic acid, organic alcohol or organic ester whose melting temperature is 10-30°C higher than the melting temperature of the phase-change substance; the organic acid refers to normal octadecanoic acid, n-nonadecanoic acid, n-eicosic acid, n-behenic acid, oleic acid, linoleic acid; the organic alcohol refers to n-nonadecanol, n-eicosanol; the organic ester refers to n- Methyl Octanoate, Ethyl Linoleate.

In the present invention, the heat storage microcapsules mentioned above are used as functional additive components, conventional fiber-forming polymers are used as substrates, and heat storage microcapsules and fiber-forming polymer melts or solutions with a weight ratio of 30-80:70-20 are mixed Mix evenly, adopt conventional or near-conventional melt or solution spinning process, and then the automatic temperature-regulating fiber of the present invention containing heat storage microcapsules can be produced. Tests show that the self-temperature-regulating fiber has good spinnability, and can be made into various self-temperature-regulating fiber products by adopting ordinary weaving (including knitting and non-woven) technology.

The present invention requires that the weight percentage of heat storage microcapsules in the fiber should be controlled between 30% and 80%. When the heat storage microcapsule weight percentage in the fiber is less than 30%, the phase change substance contained in the fiber is too little, and the heat energy absorption and storage effect is not obvious; when it exceeds 80%, the fiber is difficult to form, or the formed The physical and mechanical properties of the fiber are poor, and it does not have good textile processability. However, this does not exclude the application of the present invention when the weight percentage of heat storage microcapsules in the fiber is higher than 80%. Because under certain conditions, for example, when using the fiber of the present invention to make air purification or functional filter materials that do not require high material mechanical physics or textile processing performance, the heat storage microcapsule weight percentage in the fiber can also be higher than 80%.

The reason why the present invention limits the diameter of the thermal storage microcapsules to be in the range of 0.1-20 μm is mainly based on the technical considerations of automatic temperature-regulating fiber production. When the heat storage microcapsule diameter is greater than 20 μm, it is easy to block the filter screen or spinneret hole during spinning, or cause broken filaments, making fiber processing difficult, so the diameter of the heat storage microcapsule should not be too large; but the diameter of the heat storage microcapsule should not be too large It should not be too small. When the diameter is less than 0.1 μm, the thermal storage microcapsules are prone to bonding, which is not conducive to the uniform dispersion of the thermal storage microcapsules in the polymer. will rise substantially. Generally, when the diameter of the heat storage microcapsules is controlled between 0.5 and 10 μm, the above-mentioned problems will not occur, and the automatic temperature regulation of the heat storage microcapsules is uniform and stable, and the effect is better.

The conventional fiber-forming polymer used as fiber substrate in the present invention refers to polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polycaprolactam, polyadipic acid Hexamethylenediamine, polydecanediamine adipate, polydecanediamine sebacate, polypropylene, polyethylene and other fiber-forming polymers produced by melt spinning process; or polyacrylonitrile, polyethylene One of the fiber-forming polymers such as alcohol, regenerated cellulose fibers and acrylic acid copolymers that are produced into fibers by conventional solution spinning processes. Research and tests have shown that which fiber-forming polymer is used as the base material has no significant impact on the thermal energy absorption, storage and release functions of the fiber of the present invention. Therefore, the present invention is applicable to various conventional spinning processes, and can produce various common fibers containing heat storage microcapsules, and then produce various automatic temperature-regulating fiber products.

The functional additives of the present invention are evenly distributed in the fiber-forming polymer in the form of microcapsules, and the fiber-forming polymers are all conventional or commonly used materials, so the present invention no matter in fiber production or product processing , or in the process of people's taking or use, there is no "three wastes" pollution or potential hazards.

It should also be pointed out that after the thermal storage microcapsules of the present invention are mixed with adhesives, dispersants and defoamers in a certain proportion, the automatic temperature-regulating functional coating can also be used for the surface coating of conventional fiber fabrics. , to make self-regulating fiber products with thermal energy absorption, storage and release functions. This technical method is especially suitable for making those non-taking fiber products.

After measurement, the effect of the present invention is very obvious. For example, in the process of constant temperature rise, the internal temperature of the fiber fabric of the present invention is more than 7°C lower than that of the conventional fiber fabric of the same specification; The internal temperature is more than 6°C higher than that of conventional fiber fabrics of the same specification. In the hot summer, wearing the clothes of the fiber fabric of the present invention, the comfort time in the clothes is more than twice as long as that of the contrast fabric clothes; also in the cold winter, the clothes of the fiber fabrics of the present invention are worn, and the comfort time in the clothes is more than the comparison. Fabric garments more than double in length.

The embodiments given below can further specifically describe the present invention:

Example 1 With a melting temperature of 37°C, a heat of fusion of 210J/g, a crystallization temperature of 28°C, and a heat of crystallization of 205J/g, 500g of n-tridecyl alcohol is used as the capsule core, and 10g of n-eicosanol is added to prevent overheating melting and supercooling crystallization. Agent, 160g styrene and 80g divinylbenzene were triggered by 1.2g azobisisobutyronitrile, 5g sorbitan monoglyceride was used as emulsifier, emulsion polymerized into heat storage microcapsules under high-speed stirring at 60°C, and the heat storage microcapsules were determined. The average particle diameter of thermal microcapsules is 5.1 μm. The melting temperature of the thermal storage microcapsules measured by DSC method is 35° C., and the melting heat absorption is 134 J/g. The content of n-tridecyl alcohol in the thermal storage microcapsules is calculated to be 68%.

Mix 2 kg of thermal storage microcapsules into 8 kg of a solution containing 20% polyacrylonitrile, stir evenly, and spin under a conventional process to obtain acrylic staple fibers with a single fiber fineness of 3 dtex. The heat absorption of the fiber in the range of 20-50° C. is 73.7 J/g as measured by DSC method, and the content of heat-storing microcapsules in the fiber is calculated to be 55%. The fiber can be processed into blankets, clothing linings, etc. In addition to good thermal insulation performance, it also has the function of absorbing and releasing heat energy at the wearing temperature.

Example 2 Use n-eicosane with a melting temperature of 44°C, a heat of fusion of 205J/g, a crystallization temperature of 29°C, and a heat of crystallization of 231J/g to replace n-tridecyl alcohol in Example 1, and other compositions and processes are the same as in Example 1 Similarly, the thermal storage microcapsules were synthesized, and the average particle diameter of the thermal storage microcapsules was determined to be 3.6 μm. The melting temperature of the thermal storage microcapsules measured by DSC method is 40° C., and the melting heat absorption is 140 J/g. The content of n-eicosane in the thermal storage microcapsules is calculated to be 65%.

1kg of thermal storage microcapsules and 1kg of polyethylene terephthalate melt were evenly mixed, melt-spun to obtain polyester filaments with a monofilament fineness of 2.1dtex, and the fibers contained 50% of thermal storage microcapsules as determined by DSC method. The endothermic heat of melting is 70J/g, measured in the range of 0-50°C, the endothermic temperature is 40°C, and the exothermic temperature is 30°C. The polyester filament and 64 cotton yarns are knitted at a ratio of 2:1 and processed into knitted fabrics for processing into T-shirts. When worn in the sun in summer, there is an obvious cool feeling. The internal temperature of the T-shirts is determined to be higher than that of ordinary cotton. T-shirts are 8°C lower. When entering the room at 25°C from the outside, the internal temperature of the T-shirt is 7°C higher than that of ordinary cotton T-shirts.

Example 3 Take 500 g of a mixture of n-heptadecane, n-octadecane and n-nonadecane in a weight ratio of 2:5:3 as the capsule core, add 2 g of n-octadecanoic acid and 3 g of n-octadecanoic acid methyl ester for superheating and melting Anti-supercooled crystallization agent, 120g urea, 120g formaldehyde, 10g sorbitan triglyceride as emulsifier, emulsion polymerized under high-speed stirring at 70°C to form thermal storage microcapsules, the average particle diameter of thermal storage microcapsules was measured to be 1.2 μm. The melting temperature of the thermal storage microcapsules measured by DSC method is 30° C., and the melting endothermic heat is 120 J/g.

Heat storage microcapsules with a weight ratio of 1:1 are evenly mixed with polydecanediamine sebacate, melted and kneaded to make pellets, and melt spun to obtain nylon filaments. The maximum heat absorption temperature is 30°C, and the maximum heat release temperature The temperature is 20°C.

After the fiber is processed into sportswear fabrics and worn in an environment with a temperature difference of up to 10°C, the temperature change inside the garment is only 2°C, while the internal temperature change of the comparison garment without heat storage microcapsules reaches 5°C.

Example 4 Take 500g of a mixture of n-tridecyl alcohol, n-heptadecane and n-octadecane in a weight ratio of 3:4:3 as the capsule core, add 5g of n-octadecanoic acid methyl ester as an anti-superheat melting and supercooling crystallization agent, 120g Sodium silicate, 60g calcium chloride as capsule wall, 10g sorbitan triglyceride as emulsifier, emulsion polymerized under high-speed stirring at 70°C to form thermal storage microcapsules, the average particle diameter of thermal storage microcapsules was determined to be 8.2 μm.

With this heat storage microcapsules 1.1kg, mixed with 5kg of spinning solution containing 18% by weight of regenerated cellulose fibers, stirred evenly, spinning after defoaming, to obtain 2dtex viscose fibers containing heat storage microcapsules, the The fiber is blended with nylon at a weight ratio of 4:1 to form a yarn. When the outside temperature changes, the knitted socks will feel comfortable for more than twice as long as ordinary nylon socks.

Example 5 Take 100g of n-dodecanoic acid, 200g of n-eicosane, and 200g of n-tridecyl alcohol as the capsule core, add 10g of n-dodecanoic acid as an anti-superheat melting and supercooling crystallization agent, and 100g of 711 produced by Tianjin Jindong Chemical Factory Type epoxy resin and 20g of 105 condensate produced by Changsha Institute of Chemical Industry were used as the capsule wall, and the heat storage microcapsules were emulsion polymerized under high-speed stirring at 50°C. The average particle diameter of the heat storage microcapsules was measured to be 3.1 μm. The content of n-dodecanoic acid in the thermal storage microcapsules is calculated to be 79%.

After mixing 2kg of thermal storage microcapsules with 2kg of 71735 polypropylene produced by Liaoyang Petroleum Chemical Fiber Co., Ltd., melted and kneaded, made into pellets, spun under conventional technology, and the filaments made were used for weaving carpets, with good The indoor air temperature adjustment function of the carpet also has antibacterial properties. According to the test of Tianjin Sanitation and Disease Prevention Center, the antibacterial rate of the carpet against Escherichia coli reaches 28%.

Example 6 Take 200g of n-tetradecyl alcohol and 290g of n-octadecane as the capsule core, add 5g of n-nonadecanol and 5g of n-eicosanol as superheat melting and supercooling crystallization inhibitors, and 200g of hexamethylolmelamine as the wall material, 10g Styrene-maleic anhydride copolymer is used as an emulsifier, and is emulsion-polymerized under high-speed stirring at 70°C to form heat-storage microcapsules. The average particle diameter of heat-storage microcapsules is measured to be 1.1 μm. The calculated capsule core content in the heat storage microcapsules is 58%.

After mixing 2kg of thermal storage microcapsules and 1.5kg of poly(trimethylene terephthalate), they were melted and kneaded to be cut into pellets, and spun under a conventional melt-spinning process to obtain short fibers with a single filament fineness of 1.2dtex. After the fiber is spun, it is processed into a suit inner lining, which has the function of absorbing and releasing heat energy at the wearing temperature, which can enhance the comfort of the garment.

Example 7 Use n-hexadecane instead of n-tridecyl alcohol in Example 1, and other compositions and processes are the same as in Example 1 to synthesize heat storage microcapsules. The average particle diameter of the heat storage microcapsules is determined to be 2.7 μm. The calculated n-eicosane content in the thermal storage microcapsules is 65%.

Heat storage microcapsules and polycaprolactam are evenly mixed at a weight ratio of 1:2, melt-spun to obtain nylon filaments, and further processed into work gloves, which have the function of temperature regulation.

Comparative example Polyethylene terephthalate is melt-spun to make polyester filaments with a single fiber fineness of 2.1dtex. The fiber has no obvious heat absorption and heat release in the range of 0-50°C as determined by DSC method. The polyester filament and 64-count cotton yarn are knitted at a ratio of 2:1 and processed into knitted fabrics for processing into T-shirts. When worn in the sun in summer, there is an obvious sense of stuffiness, and the internal temperature is as high as 41°C. When entering the room at 25°C from the outside, the internal temperature of the T-shirt quickly dropped to 29°C.

Claims (7)

1. An automatic temperature-regulating fiber with automatic heat-absorbing and heat-releasing functions according to ambient temperature changes, it is characterized in that the described automatic temperature-regulating fiber is functionally added with heat-storing microcapsules, and conventional fiber-forming The polymer is the base material, and the weight ratio of heat storage microcapsules to fiber-forming polymer is 30-80:70-20, which is made by conventional spinning process; 50°C, crystallization temperature of 30-5°C, phase-change material with heat of fusion and crystallization ≥ 200J/g as the capsule core, and styrene-butadiene, melamine, urea-formaldehyde resin, epoxy resin or calcium silicate as the capsule wall, and the weight of the phase change material should account for 40-80% of the total weight of the thermal storage microcapsule; the microcapsule is synthesized by in-situ polymerization, and the diameter of the thermal storage microcapsule is 0.1-20 μm. 2. The self-regulating fiber according to claim 1, characterized in that the phase-change substance as the capsule core is n-dodecanoic acid, n-tridecyl alcohol, n-tetradecyl alcohol, n-pentadecanol, n-hexadecanol , n-hexadecane, n-heptadecane, n-octadecane, n-nonadecane, n-eicosane, n-hexadecane, n-docosane; the capsule wall It is one of styrene-butadiene, melamine, urea-formaldehyde resin, epoxy resin or calcium silicate. 3. The self-temperature-regulating fiber according to claim 1 or 2, characterized in that the diameter of the heat storage microcapsules is 0.5-10 μm. 4. The self-regulating fiber according to claim 1 or 2, characterized in that the thermal storage microcapsule core also contains an anti-superheat melting or supercooling crystallization agent with a weight of 1-10% of the phase change substance. 5. The self-temperature-regulating fiber and its products according to claim 3, characterized in that the thermal storage microcapsule core also contains an anti-superheat melting or supercooling crystallization agent with a weight of 1-10% of the phase change substance. 6. The self-temperature-regulating fiber according to claim 4, characterized in that the anti-superheat melting and supercooling crystallization agent is an organic acid, an organic At least one of alcohol or organic ester; said organic acid refers to n-octadecanoic acid, n-nonadecanoic acid, n-eicosanic acid, n-helicoic acid, oleic acid, linoleic acid; said organic alcohol is Refers to n-nonadecanol and n-eicosanol; the organic esters refer to methyl n-octadecanoate and ethyl linoleate. 7. The self-temperature-regulating fiber according to claim 5, characterized in that the anti-superheat melting and supercooling crystallization agent is an organic acid, an organic At least one of alcohol or organic ester; said organic acid refers to n-octadecanoic acid, n-nonadecanoic acid, n-eicosanic acid, n-helicoic acid, oleic acid, linoleic acid; said organic alcohol is Refers to n-nonadecanol and n-eicosanol; the organic esters refer to methyl n-octadecanoate and ethyl linoleate.