Dry Microporous Coating Manufacturing Technology and Microporous Coating Fabric Production Technology

Abstract

The invention discloses a dry-process microporous coating production process and a microporous coating fabric production process, including (1) a polyurethane resin mixed solution preparation step and (2) a gluing step, mainly for the polyurethane resin mixed solution during coating The preparation and gluing steps are innovatively designed, and the prepared polyurethane resin mixed solution is stable and has complete emulsification effect. According to TOL / H 2 The boiling point of O mixed solution is different, and at different temperatures, the volatilization rate is different to form holes, which can well avoid skinning and layering after gluing, and bring excellent effects of water pressure moisture permeability stability. In addition, the entire comparison material does not use DMF, avoiding the above-mentioned various disadvantages caused by DMF, and reducing production costs.

Description

technical field [0001] The invention relates to fabric coating technology, in particular to a new dry-process microporous coating production process and a microporous coated fabric production process. Background technique [0002] At present, there are two main methods of moisture permeability of fabrics. One is hydrophilic moisture permeability, which mainly uses hydrophilic groups (-COO, -NH2) to adsorb-release- the H2O vapor molecules from high pressure to low pressure. The method of adsorption is transmitted to the outside of the body. This method of moisture permeability is relatively slow. The moisture permeability is greatly affected by the temperature and humidity of the environment, and the surface of the rubber is wet when it encounters water, which seriously affects the wearing comfort and appearance. Another method is microporous moisture permeability, which mainly makes the polyurethane rubber surface form holes with a diameter of d (0.4*10-9m<d<10*10-6m),...

AI Technical Summary

Problems solved by technology

Wet microporous is mainly to coat polyurethane on the fabric, then dissolve DMF in water through a water tank, and then dry it. In this process, the solvent used is DMF, which has a stronger impact on the environment than MEK, TOL, etc. , and because of the strong polarity of DMF itself, the damage to the fabric will be greater, so that the tear strength of the fabric will be greatly reduced

At present, the dry microporous is mainly through the release paper film drawing method and the direct coating method. The release paper film drawing method includes two kinds of polytetrafluoroethylene film and polyurethane film. The price of polytetrafluoroethylene film is high, while the current price of polyurethane film is Water pressure moisture permeability is also relatively unstable, the abnormal rate is high, and the cost is relatively high

At present, in the dry microporous direct coating process, the microporous rubber material is unstable, prone to skinning, and the emulsification effect is not complete, so that the rubber material is prone to delamination when it is operated on the glue machine.

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