What is the difference between PE sheet and HDPE sheet?
2022-07.25 Read:share:
PE sheet has the characteristics of high toughness, good stretchability and good wear resistance. Widely used in chemical, clothing, packaging, food and other fields. Can be filled, flame retardant, modified, surface embossed, frosted. LDPE (High Pressure Low Density Polyethylene) is soft, low mechanical strength and low melting point, suitable for making films and cable insulation. HDPE (low pressure high density polyethylene) sheet has higher rigidity, higher mechanical strength and higher melting point. It is suitable for hollow products, injection products, etc., and is widely used in the manufacture of skating rink wall panels. Color: natural color, white, blue, yellow, gray, black, green, etc.
The English name of PE sheet is Polyethylene sheet. PE sheet is a high crystallinity, non-polar thermoplastic resin. The appearance of HDPE is milky white with a certain degree of translucency on the flakes.
PE sheet has excellent corrosion resistance to most household and industrial chemicals. Certain types of chemicals are chemically aggressive, such as corrosive oxidants (concentrated nitric acid), aromatic hydrocarbons (xylene), and halogenated hydrocarbons (carbon tetrachloride). The polymer is not hygroscopic, has good water vapour properties and can be used for packaging purposes. HDPE has good electrical properties, especially the high dielectric strength of insulation, which is very suitable for wires and cables. Medium to high molecular weight grades have excellent impact resistance at room temperature and even low temperatures of -40F. Each grade of HDPE is an appropriate combination of four basic variables: density, molecular weight, molecular weight distribution and additives. Different catalysts are used to produce tailored polymers with special properties. These variables combine to produce HDPE grades suitable for different applications; achieving the best balance in terms of performance. It has good chemical stability and can resist the attack of most acids, alkalis, organic solutions and hot water. Good electrical insulation.
The melting point of HDPE sheet is about 130℃, and the relative density is 0.941~0.960. It has good heat and cold resistance, good chemical stability, high rigidity and toughness, and mechanical strength. Good dielectric properties and resistance to environmental stress cracking. The melting point is 220~260C. For macromolecular materials, the recommended melting temperature range is between 200 - 250C.
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