JP2004123995A5 - - Google Patents

Claims (5)

A polyethylene-based resin for container lids having the following properties a) to c).
a) MFR (measured at a load of 2.16 Kg at a temperature of 190 ° C., the same applies hereinafter) is 0.5 to 5 g / 10 min and HLMFR (measured at a load of 21.6 Kg at a temperature of 190 ° C., the same applies hereinafter ) is 100 g / 10 min or higher. And HLMFR / MFR is 50 to 200,
b) Density is 0.960 g / cm ³ or more, and c) Elongation is 100% or less in the 23 ° C. tensile test. The polyethylene resin for container lids according to claim 1, which further has the properties of the following requirements d) and e).
d) The bending elastic modulus of the injection molded sample is 13000 kgf / cm ² or more, and e) the constant strain ESCR of the injection molded sample is 10 to 20 hours. The polyethylene resin is
(A) HLMFR is 0.3 to 1.0 g / 10 min, a density of 0.937 g / cm ³ or more polyethylene resin is 10 parts by mass or more and less than 30 parts by mass, and (B) MFR is 30 g / 10 min or more, density Is 0.961 g / cm ³ or more and more than 70 parts by mass of polyethylene resin and 90 parts by mass or less (A + B = 100 parts by mass)
The polyethylene-based resin for container lids according to claim 1 or 2, wherein   The polyethylene resin according to any one of claims 1 to 3, wherein the container is a container for a warm beverage.   The polyethylene resin according to any one of claims 1 to 4, wherein the lid has a bridge structure for imparting tamper evidence (preventing mischief).