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AssigneeKoyo Sangyo Co., Ltd.
InventorsYasuo Tamura, Ryoji Tanaka, Takahiko Gohma, Mitsumasa Horikawa
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A laminated material comprises a plurality of straight portions of vegetable stalks, each having an epidermis mainly of lignocellulose and a porous core. These vegetable stalks straight portions are impregnated with a thermal hardener solution of high-molecularizable liquid compound, resinified liquid, or mixtures thereof, arranged in parallel to form a layer of a sheet-like material, piling these sheet-like materials and pressing them to make these layers come to contact closely in flat condition. It is possible to make the directions of vegetable stalks in the sheet-like material different from the neighboring layers in order to strengthen a bending strength and other physical strength of the piled multi-layer laminated material, such as a pillar-like laminated material. Such pillar-like material is made by using a pair of pressing female mold and male mold, vegetable stalks being placed in the female mold and hot-pressed. After these vegetable stalks are laminated, the resin compound in the thermal hardener solution is set or harden.
A reinforced laminate comprising:
A reinforced laminate comprising a plurality of superposed layers, each layer comprising a series of compressed flattened dried contacting side-by-side, straight portions of vegetable stalks being adhered to one another by a thermal hardener impregnated therein and the layers adhered to one another by the thermal hardener impregnated in the stalks and an adhesive between the layers, the amount of thermal hardener being from 5 to 200 weight percent based on the dry weight of all the stalks and the amount of adhesive being one to 50 percent based on the dry weight of all of the sheet material, the laminate having a density of 0.3 to 0.7 gl cc.
A reinforced laminate comprising a plurality of superposed sublaminates, each sub-laminate comprising a plurality of superposed layers, each layer comprising a series of compressed flattened dried contacting side-by-side, straight portions of vegetable stalks, the stalks being adhered to one another a thermal hardener impregnated therein and the layers adhered to one another by the thermal hardener impregnated in the stalks and an adhesive between the layers, the sub-laminates having a thin sheet sandwiched between each sub-laminate and the sub-laminates being adhered together by an adhesive, the amount of thermal hardener being from 5 to 200 weight percent based on the dry weight of all the stalks and the amount of adhesive being one to 50 percent based on the dry weight of all of the sheet material, the laminate having a density of 0.3 to 0.7 gl cc.
Dependencies are inferred from the claim text.