초록 ▼

A multi-layered composite building material is provided which allows effective utilization of forest resources by using so-called low quality materials such as small-diameter wood, old wood, pieces of wood produced as byproducts of lumbering, and/or bamboo. The material can meet various requirements

A multi-layered composite building material is provided which allows effective utilization of forest resources by using so-called low quality materials such as small-diameter wood, old wood, pieces of wood produced as byproducts of lumbering, and/or bamboo. The material can meet various requirements and properties, and can be produced at a low cost. In a structural layer, an adhesive agent is applied to a plurality of finely split pieces which are formed by finely splitting a raw material such as wood or bamboo. The finely split pieces are arranging in parallel to a fiber direction. A shock/vibration-absorbing layer is formed by applying an adhesive agent to small pieces of wood and bamboo and the like. Structural layers and shock/vibration-absorbing layers are alternately arranged to provide a multi-layered structure. The structure is press-molded to a predetermined thickness and optionally heated such that the layers are adhered together to produce the composite multi-layered material. The shock/vibration-absorbing layer may be mixed with resin formed, for example, as a pellet shape, to provide a mixed vibration-absorbing material with improved properties.

대표청구항 ▼

[ What is claimed is:] [1.] A method for manufacturing a composite multi-layered material, comprising the steps of:(a) splitting a fibrous raw material comprising at least one of wood and bamboo along a fiber direction to form a first plurality of elongated pieces of said raw material;(b) further sp

[ What is claimed is:] [1.] A method for manufacturing a composite multi-layered material, comprising the steps of:(a) splitting a fibrous raw material comprising at least one of wood and bamboo along a fiber direction to form a first plurality of elongated pieces of said raw material;(b) further splitting said first plurality of elongated pieces of said raw material along the fiber direction to form a second plurality of elongated pieces of said raw material;(c) drying said second plurality of elongated pieces of said raw material to form elongated dried pieces;(d) arranging said elongated dried pieces substantially parallel to one another in at least a first structural layer;(e) applying a first adhesive agent to said elongated dried pieces in said first structural layer to cause said elongated dried pieces to be adhered together in a first adhered structural layer;(f) arranging at least said first adhered structural layer with at least one vibration/shock-absorbing layer in a plurality of layers in an alternating manner to form a multi-layered structure;(g) pressing said multi-layered structure to a predetermined thickness thereby causing said plurality of layers to adhere to one another to provide said multi-layered structure as a unitary body;wherein said at least one vibration/shock absorbing layer is obtained by the steps of:(h) providing a plurality of small pieces comprising at let one of wood and bamboo which are smaller than said elongated dried pieces;(i) drying said small pieces to form small dried pieces;(j) distributing said small substantially uniformly in said at least one vibration/shock absorbing layer; and(k) applying a second adhesive agent to said small dried pieces to cause said small dried pieces to be adhered together in a first adhered vibration/shock absorbing layer;(l) providing a plurality of resin pellets as load bearing elements;(m) distributing said resin pellets in said at least one vibration/shock absorbing layer; and(n) applying said second adhesive agent to said plurality of resin pellets to cause said resin pellets to be adhered together in said first adhered vibration/shock absorbing layer.