Resin for foam molding, foam molded article, and method for producing foam molded article

1. A method for producing a foam molded article by blow molding or vacuum molding, comprising steps of:

extruding, from a foam extruder, a melt-kneaded resin obtained by melt-kneading a foam molding resin and a foaming agent in the foam extruder to form a foamed parison; and molding the foamed parison by blow molding or vacuum molding to obtain the foam molded article, wherein the foam molding resin contains low-density polyethylene, a strain hardening degree of the low-density polyethylene is equal to or more than 0.40, and melt tension of the low-density polyethylene is equal to or more than 250 mN.

2. The method of claim 1 ,

wherein the foam molding resin further contains high-density polyethylene.

3. The method of claim 2 ,

wherein a mass ratio of the low-density polyethylene and the high-density polyethylene is 2:8 to 8:2.

4. The method of claim 1 ,

wherein shear viscosity of the low-density polyethylene is equal to or more than 450 Pa·s.

5. A method for producing a foam molded article by blow molding or vacuum molding, comprising steps of:

extruding, from a foam extruder, a melt-kneaded resin obtained by melt-kneading a foam molding resin and a foaming agent in the foam extruder to form a foamed parison; and

molding the foamed parison by blow molding or vacuum molding to obtain the foam molded article,

wherein the foam molding resin contains low-density polyethylene,

a strain hardening degree of the low-density polyethylene is equal to or more than 0.40, and

shear viscosity of the low-density polyethylene is equal to or more than 450 Pa·s.

6. The method of claim 5 ,

wherein the foam molding resin further contains high-density polyethylene.

7. The method of claim 6 ,

wherein a mass ratio of the low-density polyethylene and the high-density polyethylene is 2:8 to 8:2.

8. The method of claim 5 ,

wherein melt tension of the low-density polyethylene is equal to or more than 250 mN.