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Waterproof and vapor-permeable superfine fiber suede and its preparation method and application

A technology of microfiber and suede leather, applied in the direction of fiber processing, fiber type, textile and papermaking, etc., can solve the problems of no water resistance, general washing resistance, affecting the vapor permeability, etc.

Active Publication Date: 2021-09-10
HUAFON MICROFIBER SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the existing microfiber suede is basically very air-permeable and has no water resistance. The conventional waterproof microfiber suede is processed by post-finishing and padding with fluorine-based waterproofing agent. The waterproof effect is good but the vapor permeability decline, and the washability is not good
Chinese patent CN106592254A, by padding C6 waterproof finishing agent, makes waterproof, the disadvantage is that it affects the vapor permeability, and the washing resistance is general; Control the size of the pores generated by foaming to achieve a waterproof effect, which makes one side lose the effect of suede; for various sports products, industrial safety products, military products, etc., it needs to have excellent waterproof and vapor permeability

Method used

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  • Waterproof and vapor-permeable superfine fiber suede and its preparation method and application
  • Waterproof and vapor-permeable superfine fiber suede and its preparation method and application
  • Waterproof and vapor-permeable superfine fiber suede and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Preparation of polyurethane resin for waterproof vapor permeable leather:

[0048] (1) Polybutylene adipate diol (0.05mol), polytetrahydrofuran ether diol (0.05mol), double-terminal hydroxyl long-chain alkyl silicone oil (0.01mol), solvent N,N-dimethyl Mix formamide (100ml), add 4,4'-diphenylmethane diisocyanate (0.088mol), and react at 75°C until the content of isocyanate groups is constant;

[0049] (2) Add ethylene glycol (0.23mol), N,N-dimethylformamide (80ml), add 4,4'-diphenylmethane diisocyanate (0.224mol), react at 75°C for 1 hour, add solvent Add 4,4'-diphenylmethane diisocyanate (0.032mol) to N,N-dimethylformamide (194ml), and stop adding when the viscosity reaches 120Pa·s (25°C). Methanol (0.003mol) was added to stop the reaction, and after 30 minutes, the temperature was lowered to 50°C and the material was discharged to obtain the polyurethane resin with a solid mass fraction of 30%.

Embodiment 2

[0051] Preparation of polyurethane resin for waterproof vapor permeable leather:

[0052] (1) Polyhexamethylene adipate diol (0.08mol), polypropylene glycol (0.02mol), double-ended hydroxyl long-chain alkyl silicone oil (0.003mol), double-ended hydroxyl polytrifluoropropylmethylsilane Put oxane (0.002mol) and solvent N,N-dimethylformamide (100ml) into the reaction flask, mix well, put 4,4'-diphenylmethane diisocyanate (0.08mol), and react at 75°C until Constant isocyanate group content;

[0053](2) After the prepolymerization is completed, add ethylene glycol (0.316mol), solvent N,N-dimethylformamide (80ml), add 4,4'-diphenylmethane diisocyanate (0.32mol), 75°C React for 1 hour, add the remaining solvent N,N-dimethylformamide (210g), continue to add 4,4'-diphenylmethane diisocyanate (0.02mol), the viscosity rises to 100Pa·s (25°C ) viscosity, stop adding. Methanol (0.003mol) was added to stop the reaction, and after 30 minutes, the temperature was lowered to 50°C and the ma...

Embodiment 3

[0055] Preparation of polyurethane resin for waterproof vapor permeable leather:

[0056] (1) Polybutylene adipate diol (0.04mol), polytetrahydrofuran ether diol (0.06mol), double-ended hydroxyl long-chain alkyl silicone oil (0.006mol), double-ended hydroxyl polytrifluoropropyl Add methylsiloxane (0.002mol) and solvent N,N-dimethylformamide (100ml) into the reaction flask, mix well, add 4,4'-diphenylmethane diisocyanate (0.339mol), and heat at 75°C Reaction until the isocyanate group content is constant;

[0057] (2) After the prepolymerization is completed, add ethylene glycol (0.271mol), solvent N,N-dimethylformamide (80ml), add 4,4'-diphenylmethane diisocyanate (0.272mol), 75°C React for 1 hour, add the remaining solvent N,N-dimethylformamide (200g), continue to add 4,4'-diphenylmethane diisocyanate (0.016mol), the viscosity rises to 80Pa·s (25°C) When viscosity is reached, stop adding. Methanol (0.003mol) was added to stop the reaction, and after 30 minutes, the tempera...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a waterproof and air-permeable superfine fiber suede leather and its preparation method and application. The preparation method includes the following steps: soaking the sea-island type non-woven fabric in impregnating liquid containing polyurethane resin for waterproof and air-permeable leather, Control the liquid content at 80-100%, then scrape off the resin on the surface of the sea-island type non-woven fabric, and obtain an impregnated base cloth after coagulation and washing with water; put the above impregnated base cloth into toluene for weight reduction to obtain a primary base cloth; The above-mentioned original base cloth is post-treated to obtain the above-mentioned waterproof and air-permeable microfiber suede. The invention makes the prepared suede leather have excellent water-resistance and hydrophobicity; during the wet solidification process, the resin part forms a three-dimensional interpenetrating hole structure, and the hole diameter is small, which satisfies the easy passage of water vapor; and the adhesion between the resin and the fiber, Avoid the presence of large pores. When this product is used in microfiber suede, it achieves both water resistance and air permeability, and its production is easy to operate.

Description

technical field [0001] The invention relates to a novel waterproof and vapor-permeable superfine fiber suede leather and its preparation method and application. Background technique [0002] With the continuous improvement of people's wearing comfort and functionality, differentiated polyurethane synthetic leather has gradually attracted widespread attention from various synthetic leather companies, such as waterproof and moisture-permeable polyurethane synthetic leather. Waterproof and moisture-permeable polyurethane synthetic leather is widely used in the production of high-end shoes and high-end clothing due to its unique waterproof and vapor permeability. According to the waterproof and moisture-permeable mechanism, waterproof and moisture-permeable polyurethane synthetic leather can be divided into microporous moisture-permeable type, non-porous hydrophilic moisture-conducting type, microporous moisture-permeable and hydrophilic moisture-conducting combination type, etc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/568D06M15/572D06M15/576C08G18/61C08G18/48C08G18/42C08G18/40C08G18/32D06M101/34D06M101/38
Inventor 杜明兵胡忠杰张其斌杨银龙韩芹
Owner HUAFON MICROFIBER SHANGHAI
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