Sekisui Chemical Co., Ltd.

Shigeki Matsuki

Koji Yachi

Asami Matsumoto

Kento Nagai

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 cm/g, the average cell sizes in the MD direction and the TD direction of the foam sheet are 130 &#x3bc;m or less, and the following formulas (1) and (2) are satisfied:&#x2265;6&#x2003;&#x2003;(1); and&#x2265;5&#x2003;&#x2003;(2), where

Polyolefin resin foam sheet and adhesive tape

There is provided a polyolefin resin foam sheet having a plurality of cells which is formed by foaming a polyolefin resin, wherein, in the polyolefin resin foam sheet, the average cell sizes and the maximum cell sizes in the MD direction and the TD direction are each a predetermined value, and a ratio [TD strength at break/MD average cell size] and a ratio [MD strength at break/TD average cell size] are both 80 kPa/&#x3bc;m or more.

There is provided a polyolefin resin foam sheet having a plurality of cells which is formed by foaming a polyolefin resin composition, wherein the polyolefin resin composition contains a polyolefin resin (A) having relatively high density and a polyolefin resin (B) having relatively low density, and the weighted average resin density of the polyolefin resin (A) and the polyolefin resin (B) is 0.900 g/cmor less; and wherein a ratio [TD strength at break/MD maximum cell size] and a ratio [MD strength at break/TD maximum cell size] are both 45 kPa/&#x3bc;m or more.

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Hikone, Japan

Shigeki Matsuki