The woven fabric coating can improve certain functional uses, such as waterproofing, anti-velvet and warmth, and also adds performance to make some thin woven fabrics suitable for autumn and winter wear. But what are the factors affecting the quality of woven fabric coatings? Generally, it is mainly a problem of coating agent, base fabric and processing technology.
The coating agent is the key to affect the quality of the woven fabric coating. The technical specifications of the coating agent, in addition to the general particle size, viscosity, pH value, ionic type and solid content, are applied to the woven fabric used for making garments. In terms of layers, the film is required to be soft but not sticky. Methyl methacrylate or methyl acrylate content is high, the hand feels hard, the content is less, and it will affect the film strength. The proportion of butyl acrylate is much higher, and it feels soft but sticky. Therefore, the coating agent should have a viscosity suitable for processing, and a thickener can be added to adjust the viscosity, but a good rheology is required to facilitate the processing operation.
For example, the waterproof coating product requires that the coating agent meet the water pressure resistance of the waterproof product, so the content must be high. The content of foreign coating agents can reach 60%, while the domestic product content is only 40%, generally around 30%. Due to the addition of certain additives in the coating agent, air bubbles are often generated during processing, which also affects water pressure resistance. The coating agent also needs to have good compatibility with other chemical raw materials, otherwise it tends to become thin or thick, which affects the coating process.