Synthetic from artificial materials, it has the texture of genuine leather, which is very durable and cheap. People often say that PU leather is a kind of leather material, such as PVC leather, Italian bran paper, recycled leather and so on. The manufacturing process is a bit complicated. Due to the good tensile strength of PU base fabric, it can be coated on the base fabric and contained in it, so that the existence of the base fabric cannot be seen outside.
Development history of polyurethane fabric;
PU is the English abbreviation of poly urethane, and its chemical Chinese name is "polyurethane". It is a polymer material. Polyurethane is a new type of organic polymer material, known as "the fifth largest plastic", and is widely used in many fields of national economy because of its excellent properties. The product application fields involve light industry, chemical industry, electronics, textiles, medical treatment, architecture, building materials, automobiles, national defense, aerospace, aviation and so on.
PU coating on fabric surface first appeared in the market in 1950s. By 1964, DuPont Company of the United States had developed a PU synthetic leather used as an upper. After the Japanese company established a production line with an annual output of 600,000 square meters, after more than 20 years of continuous research and development, PU synthetic leather has been rapidly improved in product quality, variety and output. Its performance is getting closer and closer to that of natural leather, and some of its performance even exceeds that of natural leather, reaching the point where it is inseparable from natural leather, and occupies a very important position in human daily life.
Characteristics of PU material:
1, good physical properties, bending resistance, good flexibility, high tensile strength and good air permeability. The pattern of PU fabric is to press a layer of patterned paper on the surface of semi-finished leather, and then separate the paper skin after cooling, and carry out surface treatment.
2. It has high air permeability, temperature permeability up to 8000- 14000g/24h/cm2, high peeling strength and high water pressure resistance, and is an ideal material for the top and bottom layers of waterproof and breathable clothing fabrics.
3. The price is high. The price of some special PU fabrics is 2-3 times higher than that of PVC fabrics. Generally, the patterned paper needed by PU fabrics can only be discarded after 4-5 times.
4. The embossing roller has a long service life, so the cost of PU leather is higher than that of PVC leather.
Cleaning method of polyurethane fabric;
Wet cleaning and detergent cleaning, avoid gasoline scrubbing, not dry cleaning. Can only be washed with water, the washing temperature should not exceed 40 degrees, and can not be exposed to the sun. Do not touch some organic solvents. PU leather clothes need to be hung in bags and can't be folded.
The difference between PU material, PU leather and natural leather;
1, smell it.
PU leather has no smell of fur, only the smell of plastic. However, natural animal skins are different. It has a strong fur smell, and even after treatment, it will have a great taste.
2. Look at the pores.
Natural leather can see patterns or pores, can be scraped with nails, and can see animal fibers standing up. PU leather products can't see pores or patterns. If you see obvious artificial carving marks, it is made of PU, so we can also distinguish them by appearance.
3. Touch with your hands.
Natural leather feels very good and elastic. However, the feel of PU leather is poor. PU feels like touching plastic, and its elasticity is extremely poor. So it can be judged by bending leather products.