What is the difference between fabric PU and PVC?(2)

PU is divided from texture, including mirror PU, sheep texture PU, Nappa PU, two-color PU, cork texture PU, metal PU, helen texture PU, litchi texture PU, pigskin texture PU, R61 texture PU, crocodile texture PU, fish scale PU , Soft lines, etc. Mirror PU is characterized by bright surface, wrinkled mirror PU, crystal mirror PU, film mirror PU and so on. The textures of Nappa, Helen (KMF), metal, and R61 are similar, and they need to be seen very finely to distinguish them. The main reason is the difference in texture patterns. The two-color PU surface and the base fabric are the same color. Look carefully at the R61 pattern, there are some small holes; the sheep pattern is continuous small holes; the pattern of Nappa is more regular and obvious; the rest is the Helen pattern of KMF, which has no fixed rules; soft pattern PU The lines are very shallow and light. There is also a kind of elastic PU, which has obvious elasticity. The surface of the semi-PU is PU, and the base fabric is PVC, which is actually PVC, which can be torn by hand. SemiPU is also called imitation PU. To
1. Artificial leather is mainly divided into imitation leather (or rubber) and high-grade PU. Imitation leather or rubber is a general term for man-made materials such as PVC and PU. It is made on a woven fabric base or a non-woven fabric base by foaming or laminating various formulas such as PVC and PU. It is characterized by a wide range of varieties, good waterproof performance, neat edges, high utilization rate and price Relatively cheaper than genuine leather. The high-grade PU, the surface technology and the fibrous structure of the base material, almost achieve the effect of dermis, and its price is comparable to that of domestic first layer leather.
In the manufacturing process of PVC leather, the plastic particles must be melted and stirred into a paste, uniformly coated on the T/C knitted fabric base according to the specified thickness, and then entered into the foaming furnace for foaming, so that it can adapt to Produce a variety of different products with different softness requirements, and carry out surface treatment (dying, embossing, polishing, matting, polishing, etc., mainly according to specific product requirements) at the same time as baking. To
The manufacturing process of PU leather is more complicated than that of PVC leather. Since the base fabric of PU is canvas PU material with good tensile strength, it can be coated on top of the base fabric, and the base fabric can also be included in the middle to make it The appearance can't be seen in the presence of the bottom cloth. The physical properties of PU leather are better than that of PVC leather. It is resistant to tortuosity, softness, tensile strength, and air permeability (PVC does not). The pattern of PVC leather is formed by hot pressing with steel pattern rollers; the pattern of PU leather is pressed on the surface of semi-finished leather with a patterned paper first, and then the paper leather is separated to make the surface after cooling down. deal with. The price of PU leather is more than twice that of PVC leather, and the price of some special requirements of PU leather is 2-3 times higher than that of PVC leather. Generally, the pattern paper required for PU leather can only be used 4-5 times and then it is scrapped; the pattern roller has a long service life, so the cost of PU leather is higher than that of PVC leather. To
PVC can be divided into soft PVC and hard PVC. Among them, hard PVC accounts for about 2/3 of the market, and soft PVC accounts for 1/3. Soft PVC is generally used for floors, ceilings and the surface of leather, but because soft PVC contains softener (this is also the difference between soft PVC and hard PVC), it is easy to become brittle and difficult to store, so its scope of use is limited. Rigid PVC does not contain softeners, so it has good flexibility, easy forming, not brittle, non-toxic and pollution-free, and has a long storage time, so it has great development and application value. Hereinafter all referred to as PVC. The essence of PVC is a kind of vacuum blister film, which is used for the surface packaging of various panels, so it is also called decorative film and adhesive film, which is used in building materials, packaging, medicine and many other industries. Among them, the building materials industry accounts for the largest proportion at 60%, followed by the packaging industry, and there are several other small-scale applications.
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