Grade quota                         Item            

A grade

Thickeness Tolerance(%)

±3

Width Tolerance(mm)

±2

Thickness of Aluminum Layer(Ω/od)

2

Even degree of aluminum layer(%)

±5

Firmness of aluminum layer(%)

≥95

Wetting tensile (mN/m)

≥42

Vapor permeance(g/m2 .24h)

≤2

Oxygen permeance(ml/m2 .24h)

≤5

Tensile strength(Mpa)

MD

≥180

TD

≥180

Elongation(%)

MD

≥90

TD

≥90

Heat Shrinkage(%)

MD

≤2.5

TD

≤1