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Process for producing waterborne polyurethane resin based on dry process

A water-based polyurethane and production process technology, applied in the direction of layered products, chemical instruments and methods, lamination devices, etc., can solve the problems of affecting quality, affecting the effect of coating and scraping, and easy to stick to dust, so as to prevent dust from entering spraying Effect of area, enhancement effect

Active Publication Date: 2016-05-11
ZHEJIANG M&F CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in the whole manufacturing process, the transfer veneer of the release paper method in the prior art is that PU resin slurry is repeatedly coated on the release paper; Dust is sticky, which affects the effect of coating and scraping, and affects the quality after synthesis

Method used

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  • Process for producing waterborne polyurethane resin based on dry process
  • Process for producing waterborne polyurethane resin based on dry process
  • Process for producing waterborne polyurethane resin based on dry process

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0027] refer to Figure 1 to Figure 3 Shown, the method that present embodiment provides based on dry method production waterborne polyurethane resin comprises the following steps:

[0028] The first step is to use the wet polyurethane production process to make the bass, which is specifically:

[0029] a. Firstly, use impregnation equipment to soak the non-woven fabric or wool base material, and then use extrusion equipment to squeeze out part of the impregnating liquid in the non-woven fabric, so that the content of the impregnating liquid in the non-woven fabric is 1 / 2 of the weight of the non-woven fabric 10% to 40%. On the one hand, such a content can make the product form a film smoothly in the subsequent processing, and on the other hand, it also avoids the waste...

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Abstract

The invention relates to the field of waterborne polyurethane resin manufacturing technologies and discloses a dry method-based waterborne polyurethane resin producing process. The dry method-based waterborne polyurethane resin producing process comprises the steps of: S1, making a Bass by using a wet method polyurethane production process, and S2, repeatedly coating PU resin slurry on a piece of release paper, drying to obtain a PU membrane and gluing the PU membrane with the Bass to obtain the waterborne polyurethane resin; in the step S2, the PU resin slurry is sprayed on the release paper by using a coating spray gun; and in the spraying process of the coating spray gun, the coating spray gun forms a ring-shaped airflow around the spraying area. According to the dry method-based waterborne polyurethane resin producing process, the coating spray gun is used for spraying, the ring-shaped airflow is formed around the spraying area during the spraying process of the coating spray gun and the ring-shaped airflow is capable of effectively preventing the dust entering into the spraying area, so that the spraying effect is improved.

Description

technical field [0001] The present invention relates to the technical field of water-based polyurethane resin manufacture, and more specifically, relates to a method for producing water-based polyurethane resin based on a dry method. Background technique [0002] Synthetic leather is widely used in the production of various shoes, boots, luggage and ball games. The polyurethane artificial leather is mainly divided into dry polyurethane artificial leather and wet polyurethane artificial leather. Among them, the so-called dry-process polyurethane artificial leather refers to a multi-layer structure formed by adding a base cloth to the obtained multi-layer film after the solvent in the solvent-type polyurethane resin is volatilized. The wet-process polyurethane artificial leather is a multi-layer structure with air permeability and moisture permeability and a continuous porous layer obtained by using solvent-based polyurethane to form a film in water. Currently, the dry metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06N3/14B32B37/00
Inventor 邵烨叶青松何韬
Owner ZHEJIANG M&F CHEM