What is the difference between PU and PVC?
Most people will refer to synthetic leathers other than leather, such as PVC and PU leather, as artificial leather or imitation leather. PVC and PU are all polyvinyl chloride (one of the plastics), but the manufacturing process of these two products is not the same.
In the manufacturing process, the PVC leather is firstly melted into a paste by hot melt, and uniformly coated on the base of the T/C knitted fabric according to the specified thickness, and then foamed in the foaming furnace to make it adaptable. Production of a variety of different products, different requirements of softness, surface treatment at the same time of the release (dyeing, embossing, polishing, matting, grinding and raising, etc., mainly in accordance with specific product requirements).
PU leather is more complicated in manufacturing process than PVC leather. Since the base fabric of PU is a canvas material with good tensile strength, in addition to being coated on the top of the base fabric, the base fabric can be included in the middle to make it The appearance does not see the presence of the cloth. The physical properties of PU leather are better than those of PVC leather. It is resistant to tortuosity, softness, tensile strength and gas permeability (no PVC). The pattern of the PVC leather is made by hot pressing of a steel pattern roll; the pattern of the PU leather is pressed on the surface of the semi-finished leather with a pattern paper, and the paper leather is separated after waiting for cooling, and the surface is made. deal with. The price of PU leather is more than double that of PVC leather. The price of PU leather with special requirements is 2-3 times higher than that of PVC leather. Generally, the pattern paper required for PU leather can only be scrapped 4-5 times; the use period of the pattern roller is long, so the cost of PU leather is higher than that of PVC leather.
There are also some differences in the scope of application of these two materials. In terms of footwear, PVC leather is mostly used in lining or non-weight-bearing parts, or in the manufacture of children's shoes; PU leather can be applied to the fabric of the footwear or the part bearing the weight. In terms of bags, PVC leather is more suitable. This is because the items in the bag are different from the feet worn in the shoes, and do not dissipate heat; do not bear the weight of the individual.
The difference between PU and PVC is relatively easy. From the corner, the base fabric of PU is much thicker than PVC, and the feel is different. The feel of PU is softer; the feel of PVC is harder; it can also be burned with fire. The taste is much lighter than the taste of PVC.