What is the difference between fabric PU and PVC?(3)

2. Synthetic leather (semi-PU leather)
Synthetic leather is a good leather substitute for winter leather jackets, but because synthetic leather is processed using TPU (polyurethane elastomer). The price of TPU is very expensive, so many domestic manufacturers use PVC as a partial replacement. They do this: first coat PVC (artificial leather) on the cloth base and then coat the TPU coating. In this way, the price can be greatly reduced, but the plasticizer in PVC will migrate out in less than a year, causing the synthetic leather (actually artificial leather) to harden and become brittle, so some customers can’t buy a new leather jacket. It was brittle and cracked in one year. In fact, the factory that produces synthetic leather calls him semi-synthetic leather or semi-PU leather.
Semi-PU leather can be identified by a very simple method, that is, use copper wire in a fire to heat it until the color of the fire is red (not green), the copper wire is also red in the fire, and the copper wire is immediately heated. Put the synthetic leather on the synthetic leather, and the synthetic leather will melt on the copper wire. Finally, put the copper wire on the fire again. If the fire at this time is green, it proves that there is PVC, which is half PU leather. If the fire is red, it is proved to be PU leather. This method is a simple method and can be used for general identification.
3. The characteristics and differences of PVC and PU
PVC is the earliest invented substitute for leather fabrics. It is made by calendering and compounding PVC with plasticizers and other additives on the cloth. The advantages are low price, rich colors, and various patterns. The disadvantage is that it is easy to harden. Become brittle. To
PU synthetic leather is used to replace PVC artificial leather, and its price is higher than PVC artificial leather. In terms of chemical structure, it is closer to leather fabrics. It does not use plasticizers to achieve softness, so it will not become hard and brittle. At the same time, it has the advantages of rich colors and various patterns, and the price is cheaper than leather fabrics. So it is welcomed by consumers. To
The difference between PU and PVC is relatively easy. From the corners, the PU base fabric is much thicker than PVC, and the feel is different. PU has a softer feel; PVC has a harder feel; it can also be burned with fire. PU The smell is much lighter than that of PVC. To
PU is polyurethane, and PU leather is the skin of polyurethane. Now garment manufacturers widely use this material to produce clothing, commonly known as imitation leather clothing. PU is the abbreviation of English poly urethane. The chemical Chinese name of polyurethane is also good or bad. Good bags Imported PU leather is mostly used;
PU leather is generally the second layer of leather with cowhide on the opposite side, and a layer of PU resin is coated on the surface, so it is also called film cowhide. The price is relatively cheap and the utilization rate is high. With the change of craftsmanship, it is also made into various grades, such as imported two-layer cowhide. Because of its unique craftsmanship, stable quality, and novel varieties, it is the current high-end leather, and the price and grade are no less than the first-layer leather. PU leather and leather bags have their own characteristics. PU leather bags are beautiful in appearance, easy to handle, and low in price, but they are not wear-resistant and easy to break; leather is expensive, troublesome to care, but durable.
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