Nippon Petrochemicals Company, Limited

Hiroshi Shimizu

Tsutomu Miyamoto

Suehiro Sakazume

Masato Katou

Fusao Tokuhiro

A method for laminating a porous sheet 1 and a coarse mesh reinforcing material 2 which includes an adhesive layer and is reinforced by drawing, by heat pressing with that adhesive layer in between, in which, (1) the heating temperature during heat pressing is equal to or above the melting point of the adhesive layer and equal to or below the melting point of the porous sheet, (2) a specific relationship is maintained among the difference between the heating temperature and the melting point of the adhesive layer, the difference between the heating temperature and the softening point of the porous sheet, and the heating time, and (3) the unrolling tension of the porous sheet is maintained at 200 to 550 g/mm.sup.2. The method allows a reinforced laminated material that retains moisture permeability and has excellent mechanical strength to be obtained inexpensively without the occurrence of wrinkling or remarkable curling

Method for laminating porous sheet and coarse mesh reinforcing material

A monoaxially oriented material of a longitudinally monoaxially oriented reticular web (a), a transversely monoaxially oriented reticular web (b) or a monoaxially oriented multi-layer tape (c) which comprises a polypropylene resin layer and an adhesive layer comprising a mixture of polypropylene resin and polyethylene resin and laminated on one surface or both surfaces of the polypropylene resin layer, and a polypropylene woven or non-woven fabric prepared by laminating crosswise or weaving the monoaxially oriented materials with interposing the adhesive layer so that the orientation axes of the materials may intersect; and a method for preparing the polypropylene woven or non-woven fabric and a heat-resistant reinforced laminate material.

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Chiba-ken, Japan

Hiroshi Shimizu