| 摘要 |
PROBLEM TO BE SOLVED: To improve an oil resistance in a sheet material made of a thermoplastic olefin elastomer. SOLUTION: In an oil-resisting sheet material consisting of a thermoplastic olefin elastomer extrusion molding, a skin layer part on one side has an oil- resisting barrier layer 3, the specific gravity of which is smaller than that of a thermoplastic olefin elastomer material and which is formed by laminarly localizing oil-resisting microballoons 2. Even when a lubricant contacts with the one side of the oil-resisting sheet material 4, the oil-resisting barrier layer 3 checks the lubricant from infiltrating into the interior of the sheet material 4. Accordingly, the swelling of the whole sheet material due to the absorption of the lubricant by the rubber portion within the sheet material and its swelling can be effectively checked. |
