Water repellency of textile fabrics

The water can not be sorted through the fabric can be divided into two categories: one is called waterproof finishing, it is on the surface of the fabric coated with a layer of impermeable continuous film, so that the fabric pore blockage, water and air can not pass through. Used for industrial supplies and accessories, such as tent, truck tarpaulin and curtain; another said water repellent finishing, it is applied to a layer of water can not infiltrate water repellent film in the fabric, but not closed void fabric and fabric has the characteristics of both water repellent and breathable. Xinxiang Yulong textile fabric production is generally refers to the water repellent fabric.

Water repellent finish fabric is characterized by its water repellency and air permeability. There are three kinds of water repellent finishing, which are temporary, semi durable and durable. When the fiber surface of the fabric is uniformly covered with a layer of water repellent molecules, the water repellent effect can be achieved.

The water repellency of the fabric after water repellent finishing is due to the change of the surface properties of the fabric. Most of the water repellent finishing agent containing long chain aliphatic hydrocarbon compounds, when the fiber surface is full of molecules with hydrophobic groups, can reduce or eliminate the adsorption characteristics of water repellent finishing of fiber, so the effect of available fabric surface, air, water three among the surface or interfacial tension between said.

In water repellent, common water repellent generally has low surface energy of long chain aliphatic hydrocarbons to hydrophilic groups, and also has other fiber and fiber have strong reaction or adsorption groups make water repellent effect has a certain durability. The water repellency of the fabric is also related to the distribution of water repellent agent on the surface of cellulose fiber. The distribution of water repellent agent is not complete, which will affect their water repellent effect.

Water repellent protective clothing fabrics used to make Xinxiang Yulong textile production, the requirements of fabric with waterproof and breathable. Waterproof and moisture permeability of fabrics is two performance in opposite but closely related important characteristics of waterproof fabric is to prevent water droplets from external to internal, and the moisture permeability and moisture to sweat from the fabric inside through the fabric radiate out.