| 摘要 |
PROBLEM TO BE SOLVED: To prevent the occurrence of sheet meandering, forming failure or the like on the forming line of foamed sheet heat-forming by winding a foamed sheet having a broken air bubble structure or a thickness formed thin into a rolled shape in both the ends in foamed sheet with direction. SOLUTION: The foamed sheet roll 1 is comprised by winding a foamed sheet 2 having as a constitutional basement polystyrene resin with a thickness formed thin in both the width directional end parts 3 into a rolled shape. The density of the foamed sheet 2 is 0.03-0.9g/cm<3> , preferably, 0.06-0.25g/cm<3> . Also, the with γ of both the width directional end parts having a thickness formed thin and/or a broken air bubble structure is 10-80mm from the foamed sheet width direction, however, preferably 15-50mm. Although there is no need to take into consideration the thickness in particular in the case of the air structure broken in both end parts 3, 3, the thickness βfor forming both end parts 3, 3 thin is preferable to be 95% or less of the thickness α of not both end parts. |
