Clean production process for polyurethane synthetic leather base with ultramicro leather powder as filling material

A technology of clean production and leather powder, applied in the direction of synthetic resin layered products, layered products, textiles and papermaking, etc., can solve the problems of waste of resources, occupation of space, pollution of the environment, etc.

Inactive Publication Date: 2013-09-11
CHINA LEATHER & FOOTWEAR IND RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If these solid wastes cannot be effectively treated, they will not only occu

Method used

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  • Clean production process for polyurethane synthetic leather base with ultramicro leather powder as filling material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1. Method for producing polyurethane synthetic leather by direct coating method:

[0036] The process flow is:

[0037] 1. Preparation of ultra-fine leather powder: first use scissors to cut the leather waste into less than 1cm 2 Then use a centrifugal crusher to crush the leather waste. The high-speed rotating blade of the centrifugal pulverizer is used to hit the leather, and high-speed impact is generated between the leather and the leather, and between the leather and the barrel wall to achieve the purpose of crushing. The ultrafine leather powder of 30~80μm can be obtained through the centrifugal crusher. The ultrafine leather powder is grafted or not modified. The modified ultrafine leather powder is modified by maleic anhydride grafting. Sex, belongs to the existing technology.

[0038] 2. Preparation of micro-foaming finishing agent: 50 parts of polyurethane resin, 15 parts of water-based color paste, 15 parts of ultra-fine leather powder, 2 parts of foaming ...

Embodiment 2

[0041] Example 2. Production process of polyurethane synthetic leather by indirect coating method:

[0042] 1. Preparation of ultra-fine leather powder: first use scissors to cut it to no more than 1cm 2 Then use a centrifugal crusher to crush the leather waste. The high-speed rotating blade of the centrifugal pulverizer is used to hit the leather, and high-speed impact is generated between the leather and the leather, and between the leather and the barrel wall to achieve the purpose of crushing. The ultrafine leather powder of 30~80μm can be obtained through the centrifugal crusher. The ultrafine leather powder is grafted or not modified. The modified ultrafine leather powder adopts maleic anhydride-acrylic acid grafting. Branch modification.

[0043] 2. Preparation of micro-foaming finishing agent: 55 parts of polyurethane resin, 10 parts of water-based color paste, 20 parts of ultra-fine leather powder, 2 parts of foaming agent, 2 parts of foam stabilizer, 3 parts of crosslink...

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Abstract

The invention discloses a clean production process for a polyurethane synthetic leather base with ultramicro leather powder as a filling material. The process comprises the following steps: introducing air and water-based finishing slurry blended with ultramicro leather powder into a mixer according to a certain proportion and allowing a high-quality micro-foaming finishing agent to be formed under high-speed dispersion action of a stirring head; and coating the micro-foaming finishing agent and then drying and curing the micro-foaming finishing agent so as to prepare the synthetic leather base. The method provided by the invention has the advantages of simple preparation, easy control and the like, eliminates pollution of dimethyl formamide (DMF) produced in a wet production method for synthetic leather and reduces pollution of the industry of synthetic leather; and introduction of the natural ultramicro leather powder enables moisture and air permeability of polyurethane synthetic leather to be improved.

Description

Technical field [0001] The invention relates to a production process of synthetic leather, in particular to a clean production process of a polyurethane synthetic leather base (bottom layer) with ultrafine leather powder as a filler. Background technique [0002] Synthetic leather is a composite material that simulates the structure and performance of natural leather and can be used as a substitute for natural leather. It is widely used in making shoes, boots, bags and balls. [0003] According to the National Bureau of Statistics' statistics on the output of more than 500 enterprises above designated size in the synthetic leather industry, in 2011 it reached 2.41 million tons, or 4.3 billion square meters, of which polyurethane synthetic leather was 2.8 billion square meters, achieving a total industrial output value of more than 100 billion yuan, a year-on-year increase 9.57%, the total production volume ranks first in the world. my country has become the world's largest produc...

Claims

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Application Information

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IPC IPC(8): D06N3/14B32B27/40B32B27/12C08L75/04C08L33/00C08L47/00C08L89/00C08J9/04
Inventor 丁志文陈永芳庞晓燕程正平刘娜杨雅琼
Owner CHINA LEATHER & FOOTWEAR IND RES INST
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