国家/地区 中国（3）
IPC部 B（3）
IPC大类 B29（3） B32（2）
IPC小类 B29D（3）
IPC B29D007/00（3）
发明人
公开年 2022（3）
申请年 2022（3）
专利权人

Multifunctional cotton-based sound-absorbing felt useful for automobile interior trim, comprises porous non-woven liner set in middle, damping vibration damping block and honeycomb elastic resin net are fixedly connected, and porous non-woven liner includes regenerated cotton staple fiber.

ZHANG L, PAN J

Composite sound-absorbing panel comprises multi-scale hole structure, and composite sound-absorbing material, where composite sound-absorbing material includes first-level holes.

LI D, WENG L, CAO H, LI C

Heating floor used for railway vehicle, comprises heating panel with heating function, foaming core layer with heat insulation function, and flame-retardant insulating plate with heat insulating function, where heating panel, foamed core layer and insulating board, circuit are sequentially adhered.

LIU W, LIN S, LIN L, WANG M, CHEN R, ZHOU Z