PU synthetic leather commonly known, the proportion of light. PU lines are paper pattern, the PU slurry is coated on the textured release paper, the release paper and then cooling setting, which will remain on the paper grain PU layer of a process.
PU can also be processed embossed, there are two wet and dry production process from speaking. Easy to distinguish between the two. Wet generally thicker, because there is a layer of BASE (low foamed layer) between the surface layer and the backing, but the law does not dry BASE, directly applied to the cloth at the end, it is more book, lines deformation.
Wider use of wet PU, luggage, handbags, shoes, balls, stationery, sofa, etc. are used more, and dry rule is mainly used in packaging and clothing.
the method of Identification:
1, PU feel softer than PVC, good quality, good toughness, generally used to make fabrics that can withstand relatively large tension;
2, PU expensive than the price of PVC;
3, PVC can be hard to tear, and the PU can not;
4, PVC base fabric is generally relatively thin, relatively thin; PVC more are water bottom clothing and Han Yi cloth bottom, and the bottom fabric of high quality PU; PVC leather substrate is typically a woven fabric and knitted fabrics, PU leather substrate is a nonwoven fabric;
5, if the fire, PU taste is lighter, PVC will be black, bad taste.
6, PVC is greater than the proportion of PU.
7, PVC lines deep, intermediate foam layer more obvious.
PU lines from points, including a mirror PU, sheep grain PU, NappaPU, color PU, soft PU wood, metal PU, PU lines Helen, embossed PU, pigskin grain PU, R61 grain PU, PU crocodile, fish scale pattern PU , soft lines and the like. PU mirror surface is characterized by bright, wrinkled PU mirror, crystal mirror PU, PU film mirror and the like. Nappa, Helen (KMF), metal, R61 these types of PU lines is quite similar to the naked eye to see very fine can tell, the main difference is the pattern of lines. Color PU surface and the bottom fabric are the same color. R61 lines look carefully, there are some Xiaodong; Yang Xiaodong Dong pattern is continuous; Nappa lines have more rules, more obvious; the rest is KMF Helen pattern, texture relatively no fixed rules; soft grain PU the lines are very shallow light. There is also a stretch PU, elastic obvious. Semi PU surface is PU, the base fabric is PVC, actually belongs to PVC, can be torn by hand, SemiPU, also known as imitation PU.