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Introduction of PVC Sheet Production Equipment Process

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PVC plastic sheet production line  is a production line equipment that uses plastic as the main raw material to produce plastic sheet. The product has the characteristics of light weight, corrosion resistance, beautiful appearance, non-toxic, tasteless, non-corrosive and anti-aging. PVC production process: Ordinary  PVC sheet extrusion line  is generally composed of roller press, printing press, back coating machine and cutting machine. Films with a thickness of only 0.3 mm to 0.7 mm are mainly produced through the direct stirring of the roller, the rotation of the roller and the high temperature rolling (the temperature in the roller reaches 220 degrees). The front side is printed with the color, and a back coating is attached to the back of the film through a back-coating machine (the back coating is composed of a special material and is a high-energy affinity agent. It is because of this back coating that the PVC film can be tightly attached. Fused with medium-d...
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Physical and Mechanical Properties of PVC

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PVC is thermally degraded in air, and the commonly used melt index cannot be used to characterize the molecular weight of polymers. In practice, it is expressed by the relative viscosity K value, which is measured by the ratio of the viscosity of the diluted polymer solution to the pure solution. The K value increases with the increase of relative molecular weight. The K value of industrially produced PVC is generally 50 ~ 70. PVC contains a lot of highly polar chlorine atoms in the molecule, which increases the intermolecular force, so it has higher mechanical strength and hardness than polyolefin. Mechanical strength is related to molecular weight, plasticizer variety and quantity, and external conditions. Generally, as the molecular weight increases, the tensile strength and elongation at break increase. When the molecular weight reaches a certain value, the increase is not obvious. With the addition of plasticizers, the mechanical properties of PVC can vary over a wide ran...
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