pubdate：2020-10-16 11:06:11 popularity：
Polyethylene sheet is also known as high-density polyethylene, hdpe board. pe sheet, is a high crystallinity, non-polar thermoplastic resin, the original hdpe appearance is milky white, in a small cross-section of a certain degree of translucent. PE sheet has excellent resistance to most domestic and industrial chemicals.
There are some types of chemicals that cause chemical corrosion, such as corrosive oxidants (concentrated nitric acid), aromatic hydrocarbons (xylene) and halogenated hydrocarbons (carbon tetrachloride). This polymer is non-hygroscopic and has relatively good water resistance to steam, which can be used for packaging purposes.
When the polyethylene sheet is formed, the temperature has a great impact on the quality of the product, and it is necessary to control the temperature of some central parts of the mold slightly lower than the temperature at both ends. Polymer polyethylene sheet to have a relatively stable temperature conditions to assist; The distance of the die lip should be equal to and slightly less than the thickness of the polyethylene liner, and the uniform and stable temperature ensures that the flow rate of the extrusion melt is stable and isobaric, so that the longitudinal thickness error value of the liner is minimized.
Formed product temperature control The stable temperature is too high or relatively low should affect the flow rate of molten polymer polyethylene sheet suppliers, then the thickness of the formed polyethylene wear-resistant plate will produce a great error. At very high temperature, the molten material is easy to decompose and there will be bubbles in the lining plate; When the temperature is low, the surface of the lining board is dark and not smooth.
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