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Polyethylene bottle characteristics

Carrie May 27,2019 Share this post:

The properties of polyethylene bottles depend mainly on polyethylene (PE). Many of the mechanical properties of polyethylene depend on the density and melt index of the material. Its density varies from 0.9 to 0.96 g/cm3. The melt index (solution flow index) of polyethylene varies widely, and can be 0.3-25 or more. Many important properties of polyethylene vary with density and melt index. Many of the mechanical properties of polyethylene depend on the strength of the material, fracture, distortion, and impact, as well as the thermal properties of the material.


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The polyethylene material has a low glass transition temperature of 125 degrees, but maintains its mechanical properties over a wide temperature range. Linear high molecular weight polyethylene has an equilibrium melting point of 137 degrees, but it is generally difficult to reach equilibrium. Usually, the melting point range during processing is 132-135 degrees, the ignition temperature is 340 degrees, the auto-ignition temperature is 349 degrees, and the ignition temperature of the dust is 450 degrees. The melting index of polyethylene is determined by the molecular weight of the polymer. When the polyethylene material is mixed, its melt index is also taken to a certain value according to a certain rule.

The polyethylene in the polyethylene bottle is the simplest polymer organic compound. The most widely used polymer material in the world is polymerized from ethylene. It is divided into high density polyethylene, medium density polyethylene and low density according to the density. Density polyethylene.

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