BOPP Resin

# We sell plastic raw material # BOPP Resin

There are three main types of BOPP resin special materials used in the market, the first type is suitable for medium and low speed BOPP resin extrusion line polypropylene; the second type is suitable for high-speed extrusion line polypropylene; the third type of resin is suitable for high stiffness smoke film polypropylene. At present, according to the downstream research understanding, the current downstream of the device high and low speed has been relatively vague, according to individual downstream factories, most of the relevant domestic enterprises BOPP film device can achieve high-speed operation, and the domestic BOPP film special materials are basically used, manufacturers mainly according to different film selection of relevant customary raw materials.

 

 

What is the process of making BOPP film？

BOPP film production process is that BOPP resin particles into the extruder by a certain temperature, pressure, under the action of screw shear force, melt plasticization, extrusion, the formation of particles few almost transparent amorphous thick sheet, after preheating stretching (longitudinal 4 ~ 5.5 times), and then transverse stretching (transverse 7 ~ 9 times), and then after cutting edge, thickness measurement, corona treatment, winding into film rolls. The amplitude of film production varies from 4-10 meters, and the number of layers of film is one, two, three, and up to seven layers.

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