RECYCLED ACOUSTIC BUILDING MATERIAL, AND METHOD AND APPARATUS FOR PRODUCING RECYCLED ACOUSTIC BUILDING MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a recycled acoustic building material aiming at cost reduction.;SOLUTION: The recycled acoustic building material 1 is formed of a recycled thermoplastic resin as a raw material or a main raw material. The building material is characterized by a plate-like three-dimensional network structure which is obtained by randomly entwining a plurality of filaments and partially heat-bonding the same to each other. It is preferable that a surface side of any of a single surface, both surfaces, three surfaces, or four surfaces of the three-dimensional network structure has a density which is relatively lower than the density of a portion other than the surface side. The recycled thermoplastic resin employs flakes or chips of PET bottles as a raw material or a main raw material, which are obtained by crushing the PET bottles as they are and melting the same into a flaky shape. The thus obtained recycled sound absorptive building material is suitable for the age of recycle boosting, and displays its power in reduction of disposal costs. The recycled acoustic building material 1 is mainly applicable to lower and interior portions of a floor material, for instance, and further it may be applicable to an interior portion of a double wall body.;COPYRIGHT: (C)2001,JPO