SOUND ABSORPTION MATERIAL BLOCK AND METHOD MADE THEREOF

Abstract: the present disclosure discloses a sound absorption material block having a gradient pore diameter from inside to outside, including: an outer portion having a first pore diameter; and an inner portion encapsulated by the outer portion, having a second pore diameter; the first pore diameter is in a range of 20-200 �m, the second pore diameter is in a range of 1-20 �m; the sound absorption material block has a thickness in a range of 0.5-5 mm. the sound absorption material block in the present disclosure has lower damping property and higher intensity.

Inventor(s): Zhongyang Wang, Jie Zhang, Hezhi Wang, Chao Wang

CPC Classification: C09D125/18 (COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics ; processes for applying liquids or other fluent materials to surfaces, in general, ; staining wood ; glazes or vitreous enamels ; natural resins, French polish, drying-oils, driers, turpentine, per se, ; polishing compositions other than French polish, ski waxes ; adhesives or use of materials as adhesives ; materials for sealing or packing joints or covers ; materials for stopping leaks ; processes for the electrolytic or electrophoretic production of coatings ))

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