Differences between pu and PVC coatings

PVC coating process: PVC leather in the process of making plastic particles melt mixing into a paste, according to the rules of uniform coating thickness on T/C knitted fabric bottom base, and then into the foam foaming furnace, make it a habit to produce all kinds of different products and different requirements of flexibility, together for appearance of processing (dyeing, embossing, extinction, grinding surface polishing, burr, etc., is mainly carried out in accordance with the detailed product requirements to).

PU coating process: PU leather is more complicated than PVC leather in the production process, because PU substrate is canvas material with good tensile strength, which can not only be coated on the substrate, but also contain the substrate in the center, making it impossible to see the existence of the bottom fabric. PU leather has better physical properties than PVC leather, with good bending resistance, softness, high tensile strength and air permeability (no PVC). The stripes of PVC leather are made by hot pressing of steel stripes roller; The marking of PU leather is to use a kind of marking paper to press the semi-finished leather surface with hot paste, wait for cooling down, then separate the paper leather and do the appearance treatment. The price of PU leather is more than twice higher than that of PVC leather, and the price of some special PU leather is 2-3 times higher than that of PVC leather. Generally, the speckled paper required for PU leather can only be used 4-5 times, which means it will be discarded. The application cycle of the striped roller is long, so the cost of PU leather is higher than that of PVC leather.