Waterproof cloth (canvas) craft formula

 Process flow: cloth feeding → padding (two soaking and two rolling, overrun rate 70%) → baking (185 190℃, 1.5min) → cooling roll cooling → cloth dropping

Among them: melamine resin as a crosslinking agent can react with organic fluorine water repellents to form a three-dimensional network structure on the surface of the fiber, making the film of the water repellent thinner and hindering; and MgCl2 as a metal salt homogeneous catalyst can release protons at high temperatures Catalysis is carried out to make the methylol in the cross-linking resin molecule react to achieve the cross-linking effect; isopropanol is mainly used to prevent the aggregation of the waterproofing agent in the finishing solution and achieve the effect of stable penetration