Technical characteristics of waterproof cloth (canvas)

The dyed or printed canvas must be fully washed to remove as much as possible the surface active ingredients such as dispersing agent, wetting agent, detergent and so on, so as to prevent the presence of these additives from affecting the waterproofing agent. The waterproof effect. In the preparation process of the water-repellent material and liquid, attention must be paid to the sequence of chemical material Ⅲ, namely: water-repellent → cross-linking agent → catalyst to prevent flocculation and sedimentation; and pay attention to the chemical material barrels should be used as material barrels, and metal iron barrels are prohibited. , In order to prevent the stability of the material liquid from being affected; and note: once the material liquid is configured, it should be used up within 24 hours, otherwise it is easy to deteriorate and make the material liquid invalid.