material of a complex function for heat insulation and sound absorption with a hollow structure and material of a complex function for reflection heat insulation and sound absorption

摘要

The present invention provides an inexpensive hollow composite insulating sound absorbing material having excellent sound absorption and thermal insulation and an inexpensive composite functional reflective insulating sound absorbing material having excellent heat-to-light amount reflecting effect, and can form a dense porous layer and maximize the proportion of space. In order to provide a composite insulating sound absorbing material and a composite functional reflective insulating sound absorbing material, the porous network layer 50 including a plurality of space portions 52 having a rhombus shape and connecting portions 51 surrounding the plurality of space portions 52 and connected to each other. And a pair of polyethylene foams 40 bonded to the upper and lower portions of the porous network layer 50, and further surrounds the plurality of spaces 52 and the plurality of spaces 52 and is connected to each other. A pair of porous network layers 50 composed of connecting portions 51; A nonwoven fabric layer 60 bonded between the pair of porous network layers 50; And, it provides a hollow composite insulation sound absorbing material comprising a pair of polyethylene foam 40 bonded to the top and bottom of the pair of porous network layer (50).;Sound Absorption, Heat Insulation, Heat Insulation, Cheap, Light Weight, Hollow, Rhombus Shape