Manufacturing method of waterborne polyurethane nubuck leather

A technology of water-based polyurethane and a manufacturing method, applied in the field of synthetic leather manufacturing, can solve problems such as environmental and human harm, and achieve the effects of high color fastness, soft hand feeling and bright colors

Inactive Publication Date: 2013-11-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the entire synthetic leather industry is based on solvent-based polyurethane. A large amount of organic solvents such as dimethyl formamide, methyl ethyl ketone, toluene, and ethyl ace...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Step 1: Coating a water-based polyurethane foam coating on the base fabric, the coating method is scrape coating, and the base fabric is woven suede in woven fabric.

[0051] The slurry formula of waterborne polyurethane foam coating is:

[0052] Waterborne polyurethane resin (40% solid content; Hefei Ketian GS-200) 100 parts by mass;

[0053] Thickener (Deqian Hemings Rheolate-1; acrylic acid type) 0.2 parts by mass;

[0054] Foaming agent (AES; fatty alcohol polyoxyethylene ether sodium sulfate) 2 parts by mass;

[0055] Foam stabilizer (coconut acid monoethanolamide) 2.5 parts by mass;

[0056] Crosslinking agent (Bayer Bayhydur 3100; isocyanate type) 0.2 parts by mass;

[0057] Dyeing darkening agent (Sera Fast N-HFN; DyStar (Shanghai) Trading Co., Ltd.) 0.5 parts by mass, made by mechanically mixing and foaming, the volume ratio of the air intake of the foaming machine to the amount of slurry is 0.5:1.

[0058] Step 2: drying the coated substrate at a drying t...

Embodiment 2

[0063] Step 1: Coating a water-based polyurethane foam coating on the base fabric, the coating method is scrape coating, and the base fabric is weft-knitted elastic raised fabric among knitted fabrics.

[0064] The slurry formula of waterborne polyurethane foam coating is:

[0065] Waterborne polyurethane resin (45% solid content; Hefei Ketian GS-200) 100 parts by mass;

[0066] Thickener (Deqian Hemings Rheolate-1; acrylic acid type) 1.8 parts by mass;

[0067] Foaming agent (AES; fatty alcohol polyoxyethylene ether sodium sulfate) 3 parts by mass;

[0068] Foam stabilizer (coconut acid monoethanolamide) 3 parts by mass;

[0069] Crosslinking agent (Bayer Bayhydur 3100; isocyanate type) 1.1 parts by mass;

[0070] Dyeing darkening agent (DESOAGEN BF, Desaier Chemical Industry Co., Ltd.) 2 parts by mass, made by mechanical mixing and foaming, the volume ratio of the air intake of the foaming machine to the amount of slurry is 1:1.

[0071] Step 2: drying the coated substrate...

Embodiment 3

[0076] Step 1: Coat the base fabric with a water-based polyurethane foam coating, the coating method is roller coating, and the base fabric is spunlace non-woven fabric among non-woven fabrics.

[0077] The slurry formula of waterborne polyurethane foam coating is:

[0078] Waterborne polyurethane resin (50% solid content; Yantai Wanhua Leasys 3458) 100 parts by mass;

[0079] Thickener (Coatex company, RHEO-2000; acrylic acid type) 3.4 parts by mass;

[0080] Foaming agent (sulfosuccinate 403; disodium laureth sulfosuccinate monoester) 4 parts by mass;

[0081] Foam stabilizer (coconut acid diethanolamide) 3.5 parts by mass;

[0082] Crosslinking agent (Japan NPU, AQ-130; isocyanate type) 2 parts by mass;

[0083] Dyeing darkening agent (Weihai Chenyuan Chemical CYD-301S; polyamino polymer) 3.5 parts by mass, made by mechanical mixing and foaming, the volume ratio of the air intake of the foaming machine to the amount of slurry is 1.5 :1.

[0084] Step 2: drying the coat...

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PUM

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Abstract

The invention relates to a manufacturing method of waterborne polyurethane nubuck leather. The entire synthetic leather industry is built on the basis of solvent polyurethane as a main body at present, and causes great harm to the environment and a human body. The manufacturing method comprises the following steps: coating a prepared waterborne polyurethane foam slurry coating on base fabric; drying the coated base material, and carrying out surface polishing treatment; and finally carrying out dyeing and finishing, drying and surface modification on the polished semi-finished product to obtain the waterborne polyurethane nubuck leather. The waterborne polyurethane nubuck leather manufactured by the method has bright color, high color fastness, uniform and delicate abscess, soft handfeeling, good drapability, air and water vapor permeability and simple manufacturing process; the surface style has the effect similar to that of dermal frosted leather; the appearance and the handfeeling of the waterborne polyurethane nubuck leather are similar to those of natural leather; no organic solvent is used in the production process; no organic solvent is discharged; according to the manufacturing method, energy-saving and environment-friendly effects are achieved. Thus, the technology has positive significance in the aspects of increasing the varieties and designs of the waterborne polyurethane nubuck leather and improving the added value of products.

Description

technical field [0001] The invention belongs to the technical field of synthetic leather manufacture, and in particular relates to a method for manufacturing water-based polyurethane nubuck leather. Background technique [0002] Leather products are characterized by firmness, durability, elegance and comfort. As the earliest raw material for leather products, natural leather is widely used for its high strength, elasticity and good hygienic properties. But natural leather resource is limited, can't satisfy the needs of people's increasing living standard. Polyurethane synthetic leather is the best substitute for natural leather due to its excellent wear resistance, good tear strength and elongation, flat surface, full hand feeling, comfort, good recovery, and moderate price. [0003] At present, the entire synthetic leather industry is based on solvent-based polyurethane. A large amount of organic solvents such as dimethyl formamide, methyl ethyl ketone, toluene, and ethyl...

Claims

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Application Information

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IPC IPC(8): D06N3/14B32B27/40B32B27/12C08L75/04
Inventor 罗晓民张哲杨菲菲冯见艳张鹏刘蕊
Owner SHAANXI UNIV OF SCI & TECH
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