How to distinguish between Pu and PVC

2021/08/28

How to distinguish between Pu and PVC?

During the manufacturing process of PVC leather, the plastic particles shall be melted and stirred into a paste, evenly coated on the T / C knitted fabric substrate according to the specified thickness, and then enter the foaming furnace for foaming, so that it has the flexibility to meet the production of various products and different requirements. At the same time, the surface treatment (dyeing, embossing, polishing, extinction, grinding, fuzzing, etc.) shall be carried out at the same time, Mainly according to specific product requirements).
The manufacturing process of PU leather is more complex than that of PVC leather. Because the Pu base cloth is canvas PU material with good tensile strength, it can not only be coated on the base cloth, but also be included in the middle, so that the existence of the base cloth can not be seen outside. The physical properties of PU leather are better than PVC leather, with twists and turns resistance, good softness, high tensile strength and air permeability (PVC has no). The pattern of PVC leather is hot pressed by steel pattern roller; The pattern of PU leather is first hot pasted and pressed on the surface of semi-finished leather with a pattern paper, and then the paper leather is separated and surface treated after cooling. The price of PU leather is more than twice that of PVC leather, and 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 used for 4-5 times and will be scrapped; The service life of the patterned roller is long, so the cost of PU leather is higher than that of PVC leather.
The scope of application of the two materials is also different. 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 shoes or parts bearing weight. In terms of bags, PVC leather is more suitable. This is because the items in the bag are different from the feet in shoes and will not emit heat; No personal weight.
It is easy to distinguish between Pu and PVC. From the corners, the bottom cloth of Pu is much thicker than PVC. There are also differences in hand feeling. Pu feels softer; PVC feels harder; You can also burn it with fire. The taste of Pu is much lighter than that of PVC.