The Difference Between HDPE and LDPE Plastic Bags

As a plastic bags supplier, Fengyi will introduce the differences between the HDPE and LDPE plastic bags.

 

HDPE Plastic Bags


HDPE Plastic Bags

HDPE Plastic Bags

 


HDPE is non-toxic, tasteless and odorless. Its density is 0.940～0.976g/cm3. It is a product of polymerization under low pressure conditions under the catalysis of a catalyst, so high-density polyethylene is also called low-pressure polyethylene.

 

The Advantages of the HDPE Plastic Bags

 

HDPE is a non-polar thermoplastic resin with high crystallinity produced by copolymerization of ethylene. The appearance of the original HDPE is milky white, and the thin section is translucent to a certain extent. It has excellent resistance to most domestic and industrial chemicals. It can resist the corrosion and dissolution of strong oxidants (concentrated nitric acid), acid-base salts and organic solvents (carbon tetrachloride). The polymer does not absorb moisture and has good water vapor resistance, and can be used for moisture-proof and anti-seepage purposes.

 

The Disadvantages of HDPE Plastic Bags

 

The disadvantage of HDPE is that its aging resistance and environmental stress cracking properties are not as good as LDPE, especially thermal oxidation will reduce its performance. Therefore, when high-density polyethylene is made into plastic coils, antioxidants and  ultraviolet light absorber are added to improve its shortcomings.

 

LDPE Plastic Bags

LDPE is non-toxic, tasteless and odorless. Its density is 0.910～0.940g/cm3. It is polymerized with oxygen or organic peroxide as a catalyst under a high pressure of 100～300MPa. It is also called high pressure polyethylene.

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