Branched structure of various PE resins

PE is classified into high-density PE, linear low-density PE, and branched low-density PE according to the type and length of the side chains. For specific classification, please refer to the Japanese Industrial Standard (JIS).

High-density PE (HDPE)

HDPE is in the form of a straight chain and has short side chains which are small in number. As a result, PE is dense and has high density.

High-density PE (HDPE)

Linear low-density PE (LLDPE)

LLDPE has bulky molecules because side chains are introduced into PE. Because of this, LLDPE is not dense and has lower density than that of HDPE.

Linear low-density PE (LLDPE)

Branched low-density PE (LDPE)

Because of its chain molecules having long side chains, LDPE is bulky and has low density.

Branched low-density PE (LDPE)