In 1964, the U.S. first made the brand name DuPont Covent of synthetic leather. The synthetic non-woven synthetic leather for the end of the base, the middle to enhance the fabric and impregnated with collagen fibers and natural leather like polyurethane elastomer solution. The missile body in the water freezing, the solvent is water displacement, thus the formation of fine holes missile. These holes connect with each other, outside to the inside to form the porous layer of tough and resilient as the surface of synthetic leather, and the overall composition with the substrate. Since the formation of non-woven fiber woven capillary action is conducive to moisture absorption and migration, it can be part of the performance of synthetic leather, natural leather respiration. Kuraray Company in Japan in 1965, developed into two layers of synthetic leather, eliminating the middle of the fabric, to improve the softness of the finished product. Modern, synthetic leather variety, get rid of a synthetic non-woven fabrics of synthetic bases and polyurethane microporous surface of common features, the non-woven fiber varieties and processing techniques vary. Such as the use SBR or nitrile rubber latex substrate impregnation, in order to get non-woven fibers and specific binding between polymer; structure of different levels, there are three layers, layer 2 and layer structure; using surface embossed and tanning process manufacturing suede synthetic leather.
80 years of the 20th century, there are many varieties of synthetic leather, in addition to synthetic non-woven substrate with a porous surface layer, and polyurethane common characteristics, each species has differences. Non-woven fibers, such as different varieties and processing technology; using other substrate impregnation, such as SBR or nitrile rubber latex, non-woven fibers and polymers in order to get the specific binding between; structure of different levels, three, the coexistence of two-story structure, as well as multi-layer structure for the production of clothing. In order to obtain different surface styles, in addition to roller embossed with flowers and smooth leather rubbing leather manufacturing process, but also grinding the surface of the porous layer was velvet-like, as suede synthetic leather. To avoid destruction of porous structure embossed flower roll, but also by transfer coating method (see leather) made from dry-type synthetic leather combination, used for making bags and accessories.