Which material is better, pvc or pu? How to distinguish whether the fabric of the bag is pu or pvc? Coated fabric is a kind of fabric that is treated by special process to form a layer of uniform covering rubber on the surface of the fabric, thus making the fabric more waterproof and windproof. Bag fabrics on the market include leather, canvas, oxford cloth, PA coating, PU coating, PVC coating, PE coating, EVA and so on. How do you distinguish whether the bag fabric is pu or pvc? Which material is better, pvc or pu? Let's introduce it to you.
The PU polyurethane coating in the case is PU white glue coating and PU silver glue coating. The basic performance of PU white glue and silver glue coating is similar to that of PA coating, but the PU white glue and silver glue coating feel fuller, the fabric is more elastic, and the fastness is better, and the PU silver glue coating can withstand high water pressure, and the PU coating has moisture permeability, ventilation, wear resistance, etc., but the cost is high, and the weather resistance is poor.
The synthetic leather other than leather, such as PVC and PU leather, is generally referred to as artificial leather or imitation leather. PVC and PU are both PVC (one of the plastics), but the manufacturing process of these two products is different.
During the manufacturing process of PVC leather, the plastic particles should be melted and stirred into paste, evenly coated on the T/C knitted fabric base according to the specified thickness, and then enter the foaming furnace for foaming, so that it has the flexibility to adapt to the production of various products and different requirements. At the same time, the surface treatment (dyeing, embossing, polishing, matting, polishing and fuzzing, etc., are mainly carried out according to the 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 top of the base cloth, but also be included in the middle, so that the existence of the base cloth can not be seen from outside. The physical properties of PU leather are better than that of PVC leather. It has good resistance to twists and turns, good flexibility, high tensile strength and breathability (PVC has no). The pattern of PVC leather is made by hot-pressing steel pattern roller; The pattern of PU leather is to press a pattern paper on the surface of semi-finished leather, and then separate the paper leather after it cools down. The price of PU leather is more than twice that of PVC leather. The price of PU leather with special requirements is 2-3 times higher than that of PVC leather. Generally, the patterned paper needed for PU leather can only be used 4-5 times, and it will be scrapped; The service cycle of the pattern roller is long, so the cost of PU leather is higher than that of PVC leather.