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CN-122013550-A - Electroless refrigeration leather and preparation process thereof

CN122013550ACN 122013550 ACN122013550 ACN 122013550ACN-122013550-A

Abstract

The invention relates to an electroless refrigeration leather and a preparation process thereof, wherein the leather is formed by superposing an antifouling layer, an anti-aging layer, a refrigeration layer, a reflecting layer and a leather base cloth layer. By adding the composite cooling powder into the refrigerating layer, the infrared emissivity of the air window wave band is obviously improved, the surface temperature of the leather is effectively reduced, the reflecting layer uses particles with high and low refractive indexes to construct a scattering interface, the sunlight is efficiently reflected, the infrared radiation is matched, the leather temperature is jointly reduced, and the problem of accumulation of the surface temperature of the black leather is solved. The anti-aging layer is used for protecting leather, avoiding the reduction of the service life of the leather due to ultraviolet irradiation, and has excellent cooling effect, wear-resisting color fastness and ageing resistance through optimal design of each layer thickness.

Inventors

  • LIU XIAOFEI
  • FAN XIAOJUN
  • CHEN SIRU
  • ZHU YIHAO

Assignees

  • 深圳市创冷科技有限公司

Dates

Publication Date
20260512
Application Date
20260316

Claims (9)

  1. 1. An electroless refrigeration leather is characterized in that an antifouling layer, an anti-aging layer, a refrigeration layer, a reflecting layer and a leather base cloth layer are overlapped; The refrigerating layer comprises, by mass, 350-500 parts of aqueous polyurethane resin, 15-25 parts of a cross-linking agent, 200-300 parts of composite cooling powder, 3-6 parts of a leveling agent, 15-25 parts of a dispersing agent, 8-12 parts of a silane coupling agent, 1-3 parts of a defoaming agent, 45-100 parts of pigment powder and 80-120 parts of deionized water.
  2. 2. The electroless refrigeration leather of claim 1, wherein the composite cooling powder comprises, by mass, cu Fe 2 O 4 -80 parts, la 2 O 3 -60 parts, yb 2 O 3 -60 parts, al 2 O 3 -60 parts and Cr 2 O 3 -30 parts.
  3. 3. The electroless refrigeration leather according to any one of claims 1 or 2, wherein the pigment powder comprises, in parts by mass, fe 3 O 4 to 70 parts, mnO 2 to 20 parts, and MgO 3 to 8 parts.
  4. 4. The electroless refrigeration leather of claim 3, wherein the reflective layer comprises, by mass, 80-120 parts of deionized water, 5-10 parts of a leveling agent, 20-30 parts of a dispersing agent, 400-600 parts of an aqueous polyurethane resin, 3-6 parts of a crosslinking agent, and 60-110 parts of refractive particles.
  5. 5. The electroless refrigeration leather of claim 4, wherein the refractive particles comprise, in parts by weight, high refractive index particles having a refractive index >2 and low refractive index particles having a refractive index < 1.6; The high refractive index particles comprise 20-30 parts of TiO 2 , 5-10 parts of ZrO 2 , 8-10 parts of SiC, 6-8 parts of Si 3 N 4 and 8-10 parts of ZnSe; The low-refractive-index particles comprise 10-20 parts of BaSO 4 , 3-8 parts of SiO 2 and 3 -8 parts of CaCO.
  6. 6. The electroless refrigeration leather of claim 5, wherein the anti-aging layer comprises, by mass, 80-120 parts of aqueous polyurethane resin and 1-5 parts of ultraviolet blocking agent.
  7. 7. The electroless refrigeration leather of claim 6, wherein the stain-proofing layer comprises, by mass, 80-120 parts of aqueous polyurethane resin, 1-5 parts of silica and 0.1-0.5 part of stain-proofing auxiliary agent.
  8. 8. The electroless refrigeration leather of claim 7, wherein the stain-resistant layer is 10 to 15 μm thick, the anti-aging layer is 25 to 30 μm thick, the refrigeration layer is 50 to 300 μm thick, and the reflective layer is 80 to 100 μm thick.
  9. 9. A process for preparing an electroless refrigeration leather, characterized in that an electroless leather material according to any one of claims 7 to 8 is used, the process comprising: s1, preparing a refrigerating layer: firstly uniformly mixing the leveling agent and the dispersing agent, adding the composite cooling powder, stirring and dispersing, then adding the aqueous polyurethane resin, the silane coupling agent, the pigment powder and the defoaming agent, and uniformly stirring to obtain aqueous polyurethane cooling slurry; Adding the cross-linking agent into the aqueous polyurethane cooling slurry for cross-linking, and coating to prepare a refrigerating layer; s2, preparing a reflecting layer: Firstly stirring and mixing the leveling agent and the dispersing agent, then adding the refractive particles, stirring and dispersing, and then adding the aqueous polyurethane resin and the crosslinking agent, and mixing to obtain aqueous polyurethane resin reflective functional slurry; Coating the aqueous polyurethane resin reflective functional slurry on the refrigerating layer to obtain the reflective layer; S3, preparing an anti-aging layer: mixing the aqueous polyurethane resin and the ultraviolet blocking agent, and then coating the mixture on the refrigerating layer to obtain the anti-aging layer; s4, preparing an antifouling layer, namely mixing the waterborne polyurethane, the silicon dioxide and the antifouling additive, and then coating the mixture on an anti-aging layer to obtain the antifouling layer; S5, preparing a leather base cloth layer: And coating at least one of woven cloth, knitted cloth, non-woven cloth and composite fabric on the reflecting layer to obtain the leather base cloth layer, and then obtaining the complete electroless refrigeration leather.

Description

Electroless refrigeration leather and preparation process thereof Technical Field The invention relates to the field of leather materials, in particular to an electroless refrigeration leather and a preparation process thereof. Background The traditional leather is especially applied to automotive interiors, outdoor seats and high-frequency contact daily necessities, and two short plates with two large technologies generally exist, namely, the wear resistance and color fastness of the surface of the leather are low, the wear and color fading phenomena are easy to occur after long-term use, the attractiveness and the service life are influenced, and the heat absorption of the surface of the black leather is remarkable under high-temperature environments such as outdoor vehicles or outdoor facilities in summer, and particularly, the measured surface temperature can reach more than 100 ℃ in high-temperature high-radiation areas such as tropical areas and subtropical areas, so that the human body contact scald is extremely easy to occur, the aging process of leather materials is accelerated, the hardening, cracking and fading are caused, and the applicability and the safety and the comfort of the leather under a high-temperature scene are severely restricted. In summary, the conventional leather has the technical defects that the black leather has low solar reflectance and infrared emissivity, and heat is easy to accumulate on the surface, so that the service life is shortened, and the wear-resistant color fastness is reduced. Disclosure of Invention The invention mainly provides an electroless refrigeration leather and a preparation process thereof, and aims to solve the problems of low solar reflectance and infrared emissivity of black leather, overhigh surface temperature during use, short service life and poor wear-resistant color fastness in the prior art. The invention provides electroless refrigeration leather, which is formed by superposing an antifouling layer, an anti-aging layer, a refrigeration layer, a reflecting layer and a leather base cloth layer; The refrigerating layer comprises, by mass, 350-500 parts of aqueous polyurethane resin, 15-25 parts of a cross-linking agent, 200-300 parts of composite cooling powder, 3-6 parts of a leveling agent, 15-25 parts of a dispersing agent, 8-12 parts of a silane coupling agent, 1-3 parts of a defoaming agent, 45-100 parts of pigment powder and 80-120 parts of deionized water. The refrigerating layer can effectively reduce the temperature of leather, wherein the composite cooling powder has higher infrared emissivity and can radiate infrared light, thereby reducing the temperature of leather. Preferably, the composite cooling powder comprises, by mass, 60-80 parts of CuFe 2O4, 40-60 parts of La 2O3, 40-60 parts of Yb 2O3, 40-60 parts of Al 2O3 and 20-30 parts of Cr 2O3. The various materials of the composite cooling powder are cooperatively mixed, so that the intensity of infrared radiation and the accuracy of an atmospheric window (8-13 mu m) are increased, the infrared radiation efficiency is improved, and the surface temperature of leather is effectively reduced. Preferably, the pigment powder comprises, by mass, fe 3O4 -70 parts, mnO 2 -20 parts and MgO 3-8 parts. The pigment powder is a material capable of coloring leather into black, and MnO 2 and MgO can be matched with the reflecting layer to reflect sunlight and heat, so that the problems of more heat absorption and higher surface temperature of black leather are solved. The reflective layer comprises, by mass, 80-120 parts of deionized water, 5-10 parts of a leveling agent, 20-30 parts of a dispersing agent, 400-600 parts of aqueous polyurethane resin, 3-6 parts of a crosslinking agent and 60-110 parts of refractive particles. The refractive particles are arranged in the reflective layer, so that most sunlight can be reflected back, heat cannot enter the leather, and the temperature of the leather is further reduced. Preferably, the refractive particles comprise high refractive index particles having a refractive index >2 and low refractive index particles having a refractive index < 1.6; The high refractive index particles comprise 20-30 parts of TiO 2, 5-10 parts of ZrO 2, 8-10 parts of SiC, 6-8 parts of Si 3N4 and 8-10 parts of ZnSe; The low-refractive-index particles comprise 10-20 parts of BaSO 4, 3-8 parts of SiO 2 and 3 -8 parts of CaCO. The refractive particles in the reflective layer have high refractive index particles (refractive index > 2) and low refractive index particles (refractive index < 1.6), so that a large number of refractive interfaces can be created, the scattering times in the interfaces can be increased, and the penetration of sunlight can be reduced. Preferably, the anti-aging layer comprises, by mass, 80-120 parts of aqueous polyurethane resin and 1-5 parts of ultraviolet blocking agent. The anti-aging layer can isolate ultraviolet rays, prevent ultraviolet rays from pe