What Are The Characteristics Of HDPE Plastic Bottles

Oct 15, 2022Leave a message

The distinction between PP and PE is very simple. Touch it with your hand. The soft one is PE, and the hard one is PP

There are many kinds of PP, including wiredrawing grade and injection molding grade, but the flexibility of PP itself is not very good, and the blown film is not as smooth and soft as PE, so PP blown film is generally not used, but PP can be used as a sheet film, but only as a file bag type film, with strong characteristics

LDPE (Chinese name: low density high pressure polyethylene): sensory identification: soft feel: white and transparent, but the transparency is average; combustion identification: burning flame is yellow above and blue below; Smokeless when burning, with the smell of paraffin wax, melting and dripping, easy to draw

LLDPE (linear low density polyethylene) is structurally different from ordinary low density polyethylene because there is no long branched chain The linearity of LLDPE depends on different production and processing processes of LLDPE and LDPE LLDPE is usually produced by copolymerization of ethylene and higher a-olefins such as butene, hexene or octene at lower temperature and pressure LLDPE polymer produced during copolymerization has narrower molecular weight distribution than ordinary LDPE, and has different rheological properties due to its linear structure The melting flow characteristics of LLDPE meet the requirements of the new process, especially the film extrusion process, which can produce high-quality LLDPE products LLDPE is applied to all traditional polyethylene products, which enhances the properties of tensile resistance, penetration resistance, impact resistance and tear resistance, making LLDPE suitable for film Its excellent resistance to environmental stress cracking, low temperature impact resistance and warping resistance make LLDPE attractive for pipe, sheet extrusion and all molding applications. The latest application of LLDPE is as a mulch film used as the lining of waste residue landfill and waste liquid pool Higher tensile strength, penetration resistance, tear resistance and elongation increase are the characteristics of LLDPE, making it particularly suitable for film making If hexene or octene is used as comonomer instead of butene, even the impact resistance and tear resistance can be greatly improved For a given resin with the same melt index and density, the impact and tear properties of hexene and octene LLDPE resins are improved to 300% The longer side chains of hexene and octene resins act as "knots" between chains, improving the toughness of compounds

HDPE (High Density Polyethylene): HDPE is a high crystallinity, non-polar thermoplastic resin The original HDPE has a milky white appearance and a certain degree of translucency in the thin section. PE has excellent resistance to most domestic and industrial chemicals Some kinds of chemicals may cause chemical corrosion, such as corrosive oxidants (concentrated nitric acid), aromatic hydrocarbons (xylene) and halogenated hydrocarbons (carbon tetrachloride, This is true at room temperature and even at low temperature of - 40F


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