Polyolefin resin foam sheet and adhesive tape
AssigneeSekisui Chemical Co., Ltd.
InventorsKento Nagai, Shigeki Matsuki
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Abstract
There is provided a polyolefin resin foam sheet formed by foaming a polyolefin resin, wherein the expansion ratio of the foam sheet is 1.5 to 20 cm3/g, the average cell sizes in the MD direction and the TD direction of the foam sheet are 130 μm or less, and the following formulas (1) and (2) are satisfied: TM/D≥6 (1); and TT/D≥5 (2), where TM denotes the tensile strength at 90° C. in the MD direction, TT denotes the tensile strength at 90° C. in the TD direction, and D denotes the density (g/cm3) of the foam sheet.
Claims7
A polyolefin resin foam sheet formed by foaming a polyolefin resin, the foam sheet having the expansion ratio of 1.5 to 8 cm3/g, the foam sheet having the average cell sizes of 130 μm or less in the MD direction and the TD direction respectively, and satisfying the following formulas (1) and (2):
- TM/D≥6 (1);
- and
- TT/D≥5 (2), where
- TM denotes the tensile strength in MPa at 90° C. in the MD direction,
- TT denotes the tensile strength in MPa at 90° C. in the TD direction, and
- D denotes the density in g/cm3 of the foam sheet,
- wherein the shear strength at 90° C. is 0.3 to 10 MPa.
Dependencies are inferred from the claim text.