| abstract |
(57) [Problem] To provide a production of a foamed polyolefin resin sheet having a small thickness unevenness, a wide width, excellent flatness, and a high skin layer ratio. SOLUTION: This is a method for producing a polyolefin resin foam sheet having a skin layer having an expansion ratio of 1.1 to 5 times, comprising kneading, melting and extruding a polyolefin resin containing a foaming agent using an extruder. Extruded from a machine die to form a foamed sheet, a foamed layer inside the sheet, a skin layer formed on both front and back sides, and then the temperature at the sheet inlet is 60 ° C. or higher, and the temperature is lower than the crystallization temperature of the polyolefin resin, A method for producing a foamed polyolefin resin sheet having a skin layer, comprising shaping and cooling while nipping and transporting a pair of endless steel belts having a temperature of a sheet discharge portion of 0 to 20 ° C. |