US 6,319,961 B1 · Ethylene resin foamed products

Abstract

The present invention provides an ethylene resin foamed product containing uniform cells and having excellent appearance, toughness and flexibility. The ethylene resin foamed product comprises an ethylene/α-olefin copolymer having the following properties: the density is in the range of 0.880 to 0.940 g/cm3; the melt flow rate (MFR) at 190° C. under a load of 2.16 kg is in the range of 0.1 to 20 g/10 min; the decane-soluble component fraction (W) at room temperature and the density (d) satisfy the relation W<80×exp(−100(d−0.88))+0.1 in case of MFR≦10 g/10 min and the relation W<80×(MFR-9)0.26×exp(−100(d−0.88))+0.1 in case of MFR>10 g/10 min; and the temperature (TM) at the maximum peak position in the endothermic curve as measured by a differential scanning calorimeter and the density (d) satisfy the relation Tm<400×d−250.

Claims11

Dependent claims

An ethylene resin foamed product comprising an ethylene/α-olefin copolymer which is a copolymer of ethylene and an α-olefin of 3 to 12 carbon atoms and meets the following requirements:

(i) the density is in the range of 0.880 to 0.940 g/cm3,
(ii) the melt flow rate (MFR) at 190° C. under a load of 2.16 kg is in the range of 0.1 to 20 g/10 min,
(iii) the decane-soluble component fraction (W (% by weight)) at room temperature and the density (d (g/cm3)) satisfy the following relation
in case of MFR≦10 g/10 min:
W<80×exp(−100(d−0.88))+0.1,
in case of MFR>10 g/10 min:
W<80×(MFR−9)0.26×exp(−100(d−0.88))+0.1,
and
(iv) the temperature (Tm (° C.)) at the maximum peak position in the endothermic curve as measured by a differential scanning calorimeter (DSC) and the density (d (g/cm3)) satisfy the following relation
Tm<400×d−250.

7 more elements

Dependencies are inferred from the claim text.

Ethylene resin foamed products

Life of this patent

Ethylene resin foamed products

Life of this patent

Abstract

Claims11