Blow molding hollow plastic containers used for low-pressure HDPE, also known as HDPE, high-density polyethylene (high Density polyethylene, referred to as "HDPE"), is a highly crystalline, non-polar thermoplastic resin. The appearance of the original HDPE is Milky white, with a certain degree of translucency in the meager section. PE has excellent resistance to most of the properties of life and industrial chemicals. Some types of chemicals can produce chemical corrosion, such as corrosive oxidants (concentrated nitric acid), aromatic hydrocarbons (xylene), and halogenated hydrocarbons (carbon tetrachloride). The polymer is non-hygroscopic and has good water vapor resistance and can be used for packaging purposes. HDPE has good electrical properties, especially the dielectric strength of the dielectric is high, making it suitable for wire and cable. Medium to high molecular weight grade has excellent impact resistance, at room temperature even at -40f low temperature. The unique properties of various grades of HDPE are the proper combination of four basic variables: density, molecular weight, molecular weight distribution and additives. Different catalysts are used to produce custom-specific polymer.
These variables combine to produce HDPE grades of different uses and achieve the best balance in performance. High-density polyethylene is non-toxic, tasteless, odorless white particles, melting point of about 130 ℃, the relative density of 0.941~0.960. It has good heat resistance and cold resistance, good chemical stability, but also has a higher rigidity and toughness, good mechanical strength.
Dielectric properties, environmental stress cracking resistance is also good. Melting temperature 220~260℃.
For molecules with larger materials, it is recommended that the melting temperature range be between 200~250℃.