2results about How to "Sound-absorbing" patented technology

The utility model discloses a foaming board for ventilation and heating and a unit shell, the foaming board for ventilation and heating is used for abutting against and sealing a step structure, the step structure is provided with a bottom face and a side face, the foaming board comprises a board body, a protrusion is arranged on the peripheral side of the outer edge of the board body, the protrusion comprises a first end face and a second end face, and the first end face and the second end face are arranged on the board body. The first end face is used for abutting against the bottom face, a strip-shaped elastic sealing piece is arranged on the second end face, the elastic sealing piece is used for extruding the side face, and sealing between the side face and the second end face is achieved by extruding the side face through the elastic sealing piece. The foam board can be installed with the step structure in a matched mode through the protrusions on the outer edge, the side wall of the step structure is completely sealed through the sealing pieces on the protrusions, and due to the fact that the sealing pieces on the periphery of the foam board are in interference fit with the step structure, the sealing pieces are extruded to deform to form a sealing face to achieve the waterproof effect. The structure is higher in efficiency.

A porous body (1) has a crosslinked polymer (11) of a polymerization product of an acrylic monomer and / or a styrene monomer as a base resin. The porous body (1) has a storage elastic modulus at 23°C of 5 kPa or more and 2000 kPa or less. The apparent density of the porous body (1) is 10 kg / m 3 or more and 250 kg / m 3 or less. The crosslinked polymer (11) has a glass transition temperature of -30°C or more. The crosslinked polymer (11) has a molecular weight between crosslinking points of 1.0 x 10 4 or more. The porous body (1) is obtained by polymerizing a monomer in a water-in-oil high internal phase emulsion in which an aqueous phase is enclosed in an organic phase at a high ratio.