POLYMER SOUND-ABSORBING MATERIAL AND METHOD FOR ITS MANUFACTURING Russian patent published in 2017 - IPC F02C7/24 G10K11/162 

FIELD: construction.

SUBSTANCE: while manufacturing the polymeric absorbing material, a porous sound-absorbing filler material of minimum thickness 3 mm is cut and placed inside the cellular structure layer by means of pressing. Thereafter, a sound-absorbing filler is placed inside said structure at a such height that air cavities of the thickness not less than 2 mm are created on both sides of the sound-absorbing filler. A sound-absorbing filler is arranged by pressing over it the second layer of polymeric material having a density less than 0.3 g/cm³ and the shear strength of not more than 2 MPa, followed by removal of the latter. Thereafter the hydrophobization of the sound-absorbing filler and its gluing to the walls of the cells by impregnating it with a solution based on fluorine or silicone rubber are carried out. Another invention of the group relates to the polymeric sound-absorbing material manufactured by the above method.

EFFECT: simplification of manufacturing a sound-absorbing material, reducing its weight and moisture absorption.

3 cl, 2 dwg, 1 tbl