| 摘要 |
PROBLEM TO BE SOLVED: To obtain a reinforced polyolefin sheet being excellent in a fusion- bonding property and a mechanical strength and constituted mainly of polyolefin resin, and a manufacture thereof. SOLUTION: A polyolefin resin sheet having no crosslinking property is fusion-bonded and laminated on one surface of a polyolefin resin sheet being of the same kind and having a crosslinking property potentially and a multilayer sheet thus obtained is oriented so that a fibrous structure be given to the whole sheet. The oriented sheet is crosslinked and the crosslinked multilayer sheet is subjected to heat treatment at the temperature of the melting point of polyolefin resin or above, while a tensile force is applied thereto. By dissolving the fibrous structure in the polyolefin resin sheet not being crosslinked, a reinforced polyolefin sheet having a structure wherein the polyolefin sheet not being crosslinked and being excellent in a fusion-bonding property is laminated at least on one surface of the polyolefin sheet having a crosslinked structure and being oriented and excellent in a mechanical strength is obtained. |
