The woven fabric base fabric for coating needs to be pre-treated. The woven fabric base fabric can not be used with surfactants such as acid and alkali and other detergents. The fluff of the fabric surface should be cleaned to avoid the adhesion of the coating. When the fastness and the squeegee are applied, the hair is dragged by the hair, and the knife is damaged. The surface of the fabric is also required to be smooth and smooth, and the yarns are arranged neatly. There must be no such phenomenon as “dilute road” or “tight buckle”, so that the scraper is evenly coated and does not easily penetrate into the opposite side of the woven fabric, thereby improving the feel. .
The quality and effect of the waterproof coating depend on the warp and weft density of the woven fabric, the tightness is high, and the water repellency is good; otherwise, the water repellency is poor. When the same coating processing method is used, the waterproof performance is 60 pieces/cm×30 pieces/cm more than 50 pieces/cm×26 pieces/cm, and other woven fabric coatings basically follow this rule.
The woven fabric coating finishing process is determined by the end product's use and base fabric. For example, cotton canvas fire-fighting suits are required to have waterproof performance against water washing and water repellency. Since the warp and weft density of the base fabric is low, the surface of the fabric is not smooth, and it is difficult to meet the requirements. For mountaineering sportswear in the cold regions like Northern Europe, it is necessary to meet the requirements of breathable and moisture permeable, and to achieve a certain water pressure resistance index. To this end, it is necessary to increase the amount of coating and add functional additives to the coating agent in the process.