Abstract:
PROBLEM TO BE SOLVED: To provide a method and apparatus for producing a three-dimensional network structure, which eliminates the need for finishing in a post-process, enhances a degree of arrangement, can respond to an irregular shape, and has improved durability.SOLUTION: There is provided a plate-like three-dimensional network structure 1 composed of a thermoplastic resin as a raw material or a main raw material, in which a plurality of wires are helically and randomly entangled and partially heat-bonded. It is preferable that the density on any surface side of at least three or four surfaces of the outer periphery of the three-dimensional network structure is relatively lower than that of a portion except the surface side. A flaky or chip-like material of a PET bottle is used as the raw material or the main raw material of the thermoplastic resin, which is obtained by directly pulverizing the PET bottle to melt them into a flaky shape, and is adapted to a recycling promotion age, and works well in cost reduction of waste disposal. Main applications of the three-dimensional network structure 1 include a shock-absorbing material, a cushioning material, a sound-absorbing building material, and the like.
Abstract:
PROBLEM TO BE SOLVED: To provide a material or the like for an impact absorber low in cost and excellent in impact absorbability. SOLUTION: The material or the like for the impact absorber held in a container when used is a molded object obtained by melting a raw material comprising a thermoplastic resin or the like in a heated mortar and solidifying the molten raw material. The molded object is an aggrigate of materials having various breaking strengths and, since this molded object is successively broken upon the reception of a impact without broken at once, it can develop excellent impact absorbability. This molded object is held in the container when used and can absorb an impact without being scattered. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To prevent a pavement from being flood due to a heavy rain and abate a pavement temperature rise caused by heat. SOLUTION: A pavement material 1 comprises a platy three-dimensional network structure 2 and a water-absorbing paving plate 3 which is fixed to a top surface of the structure 2 with an adhesive material, etc., coupled by being coated, for example, with a silicon-based adhesive, and composed of waste such as sludge. Characteristically, the structure 2 is made or mainly made of a thermoplastic resin or a recycled thermoplastic resin, and constituted in such a manner that a plurality of filaments get spirally and disorderly entangled with one another and partially heat-bonded to one another. COPYRIGHT: (C)2003,JPO