The density (specific gravity) of PE resin is an industry-recognized standard physical parameter. PE is divided into three main categories—LDPE, LLDPE, and HDPE—based on molecular structure and density, with clear, stable base density ranges tested in accordance with international standards such as ASTM D792 and ISO 1183.

Density varies significantly across different grades and modified types of PE, with all values being industry-recognized measured data:

LDPE (Low-Density Polyethylene): 0.910～0.925 g/cm³, typical value 0.920 g/cm³

LLDPE (Linear Low-Density Polyethylene): 0.918～0.940 g/cm³, typical value 0.925 g/cm³

HDPE (High-Density Polyethylene): 0.941～0.965 g/cm³, typical value 0.955 g/cm³

Inorganic-filled PE (talc/calcium carbonate filled): 0.95～1.10 g/cm³, with higher filler ratios leading to greater density

Glass fiber-reinforced PE (10%～30% glass fiber): 1.00～1.20 g/cm³, with higher glass fiber content leading to greater density

Flame-retardant PE: 0.93～1.05 g/cm³, with halogen-free flame-retardant systems showing smaller density increases than halogenated systems

This density parameter is a core reference for film production, pipe extrusion, weight calculation of injection-molded products, and mold cavity design. The selection of different density grades directly determines the toughness, rigidity, and process compatibility of the final product.