Method for producing synthetic leather by using solvent-free double-component polyurethane scraping and coating method

A two-component polyurethane and synthetic leather technology, which is applied in textiles and papermaking, can solve the problems of high cost, complex technology, and high equipment requirements, and achieve the effects of reduced energy consumption, wide application range, and improved working environment

Inactive Publication Date: 2012-05-09
佛山市飞凌皮革化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Many people have tried to prepare synthetic leather with water-based polyurethane, but due to the complicated technology, high cost and high requirements for equipment, it has not been widely used.

Method used

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  • Method for producing synthetic leather by using solvent-free double-component polyurethane scraping and coating method
  • Method for producing synthetic leather by using solvent-free double-component polyurethane scraping and coating method
  • Method for producing synthetic leather by using solvent-free double-component polyurethane scraping and coating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Scratch-coat the fabric on the release paper, the coating amount is 120 g / square meter, first dry at 80°C for 60 seconds, and then dry at 110°C for 120 seconds to obtain the fabric layer; the fabric is made of 100 parts by weight of oily polyurethane HU-8550D (purchased from Shanghai Xinyu Resin Co., Ltd.), 30 parts by weight of butanone, 40 parts by weight of ethyl acetate and 5 parts by weight of pigment are mixed;

[0047] (2) Control the flow rate of the feeding machine so that the material M and SF-93N (purchased from Foshan Feiling Leather Chemical Co., Ltd.) are mixed in the mixing chamber of the feeding machine at a weight ratio of 161.1:28, poured and scraped onto the fabric layer and then dried at 90°C for 60 seconds to obtain a foamed material layer; the coating amount of the foamed material layer is 266 g / m2; the M material consists of the following components in parts by weight : SF-93H (purchased from Foshan Feiling Leather Chemical Co., Ltd.) 90 parts...

Embodiment 2

[0053] (1) Scratch-coat the fabric on the release paper, the coating amount is 130 g / square meter, first dry at 100°C for 60 seconds, and then dry at 130°C for 150 seconds to obtain the fabric layer; the fabric is made of 100 parts by weight of oily polyurethane DU-S1050 (purchased from Guangdong Daying Chemical Co., Ltd.), 30 parts by weight of water, 0.5 parts by weight of water-based thickener HEUR-A (produced by Hefei Anke Fine Chemical Co., Ltd.) and 15 parts by weight a mixture of pigments;

[0054] (2) Control the flow rate of the feeding machine so that the material M and SF-93N (purchased from Foshan Feiling Leather Chemical Co., Ltd.) are mixed in the mixing chamber of the feeding machine at a weight ratio of 161.1:28, poured and scraped onto the fabric layer and then dried at 70°C for 60 seconds to obtain a foamed material layer; the coating amount of the foamed material layer is 400 g / m2; the M material is composed of the following components in parts by weight : ...

Embodiment 3

[0060] (1) Scratch-coat the fabric on the release paper, the coating amount is 150 g / square meter, first dry at 80°C for 60 seconds, and then dry at 130°C for 120 seconds to obtain the fabric layer; the fabric is made of 100 parts by weight of oily polyurethane HU-8550D (purchased from Shanghai Xinyu Resin Co., Ltd.), 30 parts by weight of butanone, 40 parts by weight of ethyl acetate and 5 parts by weight of pigment are mixed;

[0061] (2) Control the flow rate of the feeding machine so that the material M and SF-97N (purchased from Foshan Feiling Leather Chemical Co., Ltd.) are mixed in the mixing chamber of the feeding machine at a weight ratio of 101.2:28, poured and scraped onto the fabric layer and then dried at 110°C for 60 seconds to obtain a foam material layer; the layer coating amount of the foam material is 374 g / m2; the M material is composed of the following components in parts by weight : SF-97H (purchased from Foshan Feiling Leather Chemical Co., Ltd.) 90 parts...

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Abstract

The invention discloses a method for producing synthetic leather by using a solvent-free double-component polyurethane scraping and coating method and the synthetic leather produced by using the same. The method comprises the following steps: (1) controlling the flow of a material loading machine so that an M material and an N material are mixed in the mixing chamber of the material loading machine and then poured, scraped and coated to release paper coated with an isolation layer, drying so as to obtain a foamed material layer, wherein the coating amount of scraping and coating is 50-2000g/m<2>; (2) pressing and compounding the foamed material layer, heating and solidifying; and (3) coiling, curing, and separating out the release paper at last, so as to obtain the synthetic leather finished product. According to the invention, an organic solvent and water are not used in the synthesis and mixing of polyurethane resin on a foaming layer and a bonding layer and in the various links of embarkation. Compared with the method for producing the foaming layer with a water-based polyurethane composite material, the method disclosed by the invention can greatly reduce energy consumption; and the synthetic leather has good property and excellent hand feeling.

Description

technical field [0001] The invention belongs to the field of synthetic leather and its manufacture, and in particular relates to a method for producing synthetic leather by using a solvent-free two-component polyurethane composite material by a scraping method, and the synthetic leather produced by the method. Background technique [0002] Polyurethane resins have various excellent properties and can be used in many fields, including synthetic leather and coatings. Conventional processes for producing synthetic leather from polyurethane resins are based, for example, on solvent systems in which an organic solvent such as dimethylformamide ("DMF") is added to a wet-process polyurethane resin material to prepare a porous layer, and the resulting mixture is applied to base fibers, and then soaked in water to solidify, while the water replaces the organic solvent, and then the water is removed to obtain a porous structure. It is sometimes called a "wet process" because of the w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/14C08G18/42C08G18/48C08K3/26
Inventor 彭昊梁瑞玲
Owner 佛山市飞凌皮革化工有限公司
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