PU leather The full name of Microfiber skin is "ultra-fine fiber reinforced PU leather." It has extremely excellent wear resistance, excellent cold, breathable, anti-aging properties. PU is a polyurethane. Polyurethane leather has excellent properties. In this regard, Bayer, BASF, Huntsman's production capacity is world-class, and to Toray, Asahi representative of the textile fiber suppliers have a higher product technology. Abroad, due to the impact of animal protection associations, coupled with the development of technology, polyurethane synthetic leather performance and application of surface over the natural leather. By adding ultra-fine fibers, the toughness and permeability of polyurethane, wear resistance has been further strengthened. There is no doubt that such a finished product, the performance is quite excellent. History of Development In China, people used to use PU resin as raw material for the production of artificial leather called PU leather (PU leather); with PU resin and non-woven fabrics for the production of artificial leather called PU synthetic leather (referred to as synthetic leather). PU artificial leather, PU synthetic leather, the current industry has not yet accurately named, but it was customary to the three kinds of leather referred to as synthetic leather. In the end how to name? To be unified and standardized, to give it a more appropriate name. Synthetic leather, synthetic leather is an important component of the plastics industry, in the national economy is widely used in various industries. Artificial leather, synthetic leather production in the international community for more than 60 years of development history, China since 1958 began to develop and produce artificial leather, it is in China's plastics industry is the development of earlier industries. In recent years, China's leather, synthetic leather industry is not only the production equipment production line growth, product output growth year after year, the annual increase in color varieties, and industry development process has its own industry organizations, there is considerable cohesion, which Can the Chinese leather, synthetic leather enterprises, including the relevant industry organizations together, developed into a considerable Strength of the Industry. Following the PVC artificial leather, PU synthetic leather after 30 years of technology experts with great concentration of research and development, as an ideal alternative to natural leather, access to a breakthrough in technological progress. PU coating on the surface of the fabric first appeared in the 1950s on the market, to 1964, the United States DuPont developed a PU for the upper synthetic leather. Japanese companies to establish an annual output of 600,000 square meters of production lines, after 20 years of continuous research and development, PU synthetic leather in terms of product quality, variety, or yield have been growing rapidly. Its performance more and more close to the natural leather, some properties even more than natural leather, with natural leather to the level of true and false, in human daily life occupies a very important position. Today, Japan is the largest producer of synthetic leather, Kuraray, Teijin, Toray, bell spinning, and other products of several companies on behalf of the international 20th century, basically the level of development in the 1990s. Its fiber and non-woven manufacturing towards the ultra-fine, high density and high non-woven effect direction; its PU manufacturing toward the PU dispersion, PU water emulsion direction, product applications continue to widen, from the beginning of shoes, bags Field development to the clothing, ball, decoration and other special applications, all over the daily life of all aspects. PU leather and Natural Leather Natural leather has excellent natural properties because it is widely used in the production of daily necessities and industrial products, but with the world's population growth, human demand for leather doubled, a limited number of natural leather has long been unable to meet this demand. To solve this problem, scientists began to study a few decades ago to develop artificial leather, synthetic leather, to make up for the shortage of natural leather. More than 50 years of research process is the history of artificial leather, synthetic leather to natural leather challenge process. Scientists from the analysis of natural leather chemical composition and structure of the beginning, from the start of nitrocellulose lacquer into the PVC artificial leather, which is the first generation of artificial leather products. Scientists on this basis, made a number of improvements and exploration, the first is the improvement of the substrate, followed by the coating resin modification and improvement. To the 20th century, 70 years, non-woven synthetic fiber needle-forming network, the process of bonding into a network, so that the substrate has a lotus-like section, hollow fiber-like, to a porous structure, in line with natural leather network structure Requirements; the surface of the synthetic leather has been able to do microporous structure of polyurethane layer, the equivalent of natural leather grain, so that the appearance and internal structure of PU synthetic leather and natural leather gradually close to other physical properties are close to the natural leather Indicators, and color than the natural leather is more bright; its temperature at room temperature to reach more than 1 million times, low temperature folding can achieve the level of natural leather. Superfine fiber PU synthetic leather is the third generation of artificial leather. Its three-dimensional structure of the network of non-woven synthetic leather in the substrate to create a catch-up natural leather conditions. The product, combined with newly developed PU slurry impregnated with composite structure, has played a huge surface area of superfine fibers and strong water absorption, making the ultra-fine PU synthetic leather with a superfine beam Collagen fiber natural leather inherent moisture absorption characteristics, so no matter from the internal microstructure, or the appearance of texture and physical properties and people wearing comfort, and so on, and advanced natural leather can be comparable. In addition, the ultra-fine fiber synthetic leather in chemical resistance, quality uniformity, large production and processing adaptability and waterproof, mildew degeneration, etc. more than natural leather. Practice has proved that the excellent performance of synthetic leather is a natural leather can not be replaced, from the domestic and international market analysis, synthetic leather has also been a large number of natural leather to replace the lack of resources. The use of artificial leather and synthetic leather bags, clothing, shoes, vehicles and furniture decoration, has been increasingly affirmed by the market, its wide range of applications, the large number of varieties, is the traditional natural leather can not be met. PU leather and leather PU leather and leather bags have their own characteristics: PU bag looks beautiful, good care, wear; leather take care of trouble, wear, but it is leather. PU leather products maintenance methods Method of Cleaning: 1. Dip the water and detergent, avoid gasoline scrub 2. Can not dry-clean 3. Can only be washed, and washing temperature can not exceed 40 degrees 4. Do not use sun exposure 5. Do not touch some organic solvents 6.PU leather jackets need to hang bag collection, not folding equipment Characteristics of PU and Artificial Leather: 1. High strength, thin and flexible, soft and smooth, breathable and water-permeable, and waterproof 2. Low temperature still has good tensile strength and bending disturbance strength, good light resistance to aging and hydrolysis stability 3. Not wear-resistant, appearance and performance are close to natural leather, easy to clean decontamination, easy sewing 4. Smooth surface, can be a variety of surface treatment and dyeing, species diversity