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.
Claims8
A polyolefin resin foam sheet formed by foaming a polyolefin resin, the foam sheet having the expansion ratio of 1.5 to 20 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 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.
The polyolefin resin foam sheet according to claim 14, wherein the tensile strength at 23° C. in the TD direction is 0.5 to 30 MPa.
The polyolefin resin foam sheet according to claim 15, wherein the thickness is 0.02 to 0.8 mm.
Dependencies are inferred from the claim text.