PVC and PU leather are collectively referred to as artificial leather or imitation leather.
Artificial leather: It is a material similar to natural leather obtained by a mixture of resin raw materials and other additives after certain processing. At present, the widely used resin raw materials are polyvinyl chloride (PVC) and polyurethane (PU).
Both PVC and PU are polyvinyl chloride (a type of plastic), but the manufacturing processes of these two products are different.
In the manufacturing process of PVC leather, the plastic particles should be hot-melted and stirred into a paste, uniformly coated on the T/C knitted fabric base according to the specified thickness, and then entered into the foaming furnace for foaming, so that it can adapt to produce a variety of products with different softness requirements, and carry out surface treatment at the same time as they are out of the oven.
The manufacturing process of PU leather is more complicated. The base fabric of PU is a canvas PU material with good tensile strength. In addition to being coated on the top of the base fabric, the base fabric can also be included in the middle, so that the base fabric cannot be seen from the outside. exist.
What are the differences between PVC leather and PU leather?
- Temperature resistance: The maximum temperature resistance of PU can reach 90℃, and the maximum temperature resistance of PVC is 65℃.
- Wear resistance: PU material is more wear-resistant, PVC is brittle and easy to break, and has a short life.
- Softness: PU is softer, and PVC is relatively hard, unless a lot of plasticizers are added in PVC. (Plasticizer is an additive that makes PVC soft, but there are strict requirements for plasticizer content in food standards, so soft PVC, plasticizers are far from meeting environmental protection requirements.)
- Price: The price of PU leather is more than double that of PVC leather, and the price of PU leather with some special requirements is 2-3 times higher than that of PVC leather. Generally, the pattern paper required for PU leather can only be used for 4-5 times, and then it will be scrapped; the service cycle of pattern rollers is long, so the cost of PU leather is higher than that of PVC leather.
- Composition: PU is a thick material based on polyurethane resin and fillers, and PVC is a thick material based on polyvinyl chloride, plasticizers and fillers.