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Preparation process of blending modified easy-to-clean leather

A technology of blending modification and preparation process, applied in textiles and papermaking, etc., can solve the problems of easy phase separation, high hardness of finishing agent, low elongation rate, etc., and achieve good antibacterial effect, ingenious process and good compatibility. Effect

Pending Publication Date: 2021-12-21
南通中豪超纤制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Leather products are widely used in daily life, and the various chemical reagents used in the manufacturing process of the highest-grade leather products will cause great pollution to the environment, which does not meet the requirements of environmental protection; the shape of the leather is irregular, there are many surface defects, and the utilization rate Low, high cost for customers; microfiber leather is gradually replacing traditional polyvinyl chloride and wet-process polyurethane leather, and is currently the closest product to real leather; ordinary synthetic leather is produced from thermoplastic polyurethane, its heat resistance, durability The maintainability is difficult to meet the use requirements of some public places
In order to make the leather surface have a decontamination effect, in the past, gravure printing was used to achieve decontamination, and the two-component anti-graffiti acrylic coating agent was transferred to the resin surface of the leather surface. The production efficiency was low, the cost was high, and the coating agent had high hardness and low elongation. , affects the overall softness and texture of the product, and cannot be applied to high-elongation leather surfaces
At present, there is also an internal addition coating method to apply the finishing agent on the leather surface, but the compatibility between the finishing agent and the resin is poor, and problems such as phase separation and precipitation are prone to occur.
Ordinary polyurethane resin does not have anti-graffiti, anti-sticking, waterproof and other effects

Method used

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  • Preparation process of blending modified easy-to-clean leather
  • Preparation process of blending modified easy-to-clean leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of preparation technology of blending modified easy decontamination leather, concrete steps are as follows,

[0023] a. Coat the modified polyurethane mixed slurry on the release paper, dry at 80°C for 2 minutes, and the coating amount is 100g / ㎡ to form a surface layer; the modified polyurethane mixed slurry, wherein: modified polyurethane Resin: 100 parts by mass, leveling agent: 0.3 parts by mass, aliphatic NCO prepolymer 1.0 parts by mass, defoamer 0.1 parts by mass, antifungal agent 0.8 parts by mass.

[0024] The preparation method of described modified polyurethane resin:

[0025] 1) 100 parts by mass of one or two polyurethane resins with a solid content of 20% polyester, polyether or polycarbonate is raised to 70°C to reduce the viscosity of the system.

[0026] 2) Slowly add 3 parts by mass of a di- and trifunctional isocyanate curing agent with an NCO content of 6% and 0.5 parts by mass of a hydroxyl polyether-modified siloxane with a hydroxyl value of...

Embodiment 2

[0034] A kind of preparation technology of blending modified easy decontamination leather, concrete steps are as follows,

[0035] a. Coat the modified polyurethane mixed slurry on the release paper, dry at 90°C for 3 minutes, and the coating amount is 120g / ㎡ to form a surface layer; the modified polyurethane mixed slurry, wherein: modified polyurethane Resin: 100 parts by mass, leveling agent: 0.5 parts by mass, aliphatic NCO prepolymer 2.0 parts by mass, defoamer 0.2 parts by mass, antifungal agent 1.5 parts by mass.

[0036] The preparation method of described modified polyurethane resin:

[0037] 1) 100 parts by mass of one or two polyurethane resins with a solid content of 50% polyester, polyether or polycarbonate is raised to 90°C to reduce the viscosity of the system.

[0038] 2) Slowly add 4 parts by mass of di- and trifunctional isocyanate curing agents with an NCO content of 9% and 3 parts by mass of hydroxyl polyether-modified siloxane with a hydroxyl value of 70 m...

Embodiment 3

[0046] A kind of preparation technology of blending modified easy decontamination leather, concrete steps are as follows,

[0047] a. Coat the modified polyurethane mixed slurry on the release paper, dry at 85°C for 2.5 minutes, and the coating amount is 110g / ㎡ to form a surface layer; the modified polyurethane mixed slurry, wherein: modified polyurethane Resin: 100 parts by mass, leveling agent: 0.4 parts by mass, aliphatic NCO prepolymer 2 parts by mass, defoamer 0.15 parts by mass, antifungal agent 1.15 parts by mass.

[0048]The preparation method of described modified polyurethane resin:

[0049] 1) 100 parts by mass of one or two polyurethane resins with a solid content of 30% polyester, polyether or polycarbonate is raised to 80°C to reduce the viscosity of the system.

[0050] 2) Slowly add 3 parts by mass of a di- and trifunctional isocyanate curing agent with an NCO content of 8% and 2 parts by mass of a hydroxyl polyether-modified siloxane with a hydroxyl value of ...

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Abstract

The invention relates to a preparation process of blending modified easy-to-clean leather. The preparation process of the blending modified easy-to-clean leather comprises the following specific steps of a, coating release paper with modified polyurethane mixed slurry to form a surface layer; b, coating release paper with the polyurethane mixed slurry to form a polyurethane transition layer; c, coating the dried polyurethane transition layer with environment-friendly high-solid-content polyurethane slurry to form a high-solid-content polyurethane slurry layer; d, superposing a superfine fiber fabric on the high-solid-content polyurethane slurry layer, and then extruding and compounding by a compression roller; e, baking in a baking oven; and f, cooling to normal temperature through a cooling wheel, and separating the leather from the release paper to obtain synthetic leather. The preparation process of the blending modified easy-to-clean leather has the advantages that an intaglio printing mode is not needed, the modified polyurethane resin is adopted for internal addition, and the method is good in compatibility, free of separation and good in precipitation.

Description

technical field [0001] The invention relates to the field of leather production, in particular to a preparation process of blended modified decontamination leather. Background technique [0002] Leather products are widely used in daily life, and the various chemical reagents used in the manufacturing process of the highest-grade leather products will cause great pollution to the environment, which does not meet the requirements of environmental protection; the shape of the leather is irregular, there are many surface defects, and the utilization rate Low, high cost for customers; microfiber leather is gradually replacing traditional polyvinyl chloride and wet-process polyurethane leather, and is currently the closest product to real leather; ordinary synthetic leather is produced from thermoplastic polyurethane, its heat resistance, durability Maintainability is difficult to meet the use requirements of some public places. In order to make the leather surface have a decont...

Claims

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Application Information

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IPC IPC(8): D06N3/14D06N3/00
CPCD06N3/145D06N3/0097D06N3/0059D06N3/0006D06N2209/146D06N2211/28D06N2209/142D06N2209/1671Y02P70/62
Inventor 王林云刘明刘小平
Owner 南通中豪超纤制品有限公司
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