To contrive improvement in performance by using a laminated plate integrally arranging a heat insulator between laminated materials composed of a bamboo material layer and a sheet-like material as bed material, structural material or the like.
A heat insulator 3 is integrally arranged between rear face material 2 and surface material 1 composed of an laminated layer body laminating bamboo material and a sheet-like material of one layer or more to constitute a composite heat insulation plate A. for instance, with regard to bamboo material, after thick stemmed bemboo is longitudinally divided, cut, and manufactured into a flat plate by a means such as temperature, steam, an electromagnetic wave process and a press, the plate is stuck to one another in the width direction to make a wide long plate. A sheet-like material is composed of unwoven cloth and a synthetic resin sheet, cushion is utilized to absorb a heat contraction difference between laminated material and deformation is prevented. Synthetic resin or inorganic substance is used as the heat insulator 3. Thereby lightweight can be performed, mechanical strength can be sharply improved, if used as structural material, cost can be reduced, in addition, watertightness, anti-corrosion, insect proofness and the like of bamboo material can be utilized, and furthermore since bamboo material grows quickly, resource can be prevented from being exhausted.
UMETSU HIROYUKI
TAKIGUCHI HIDEKI
