Soundproof cover
The present invention provides a soundproof cover comprising: a sound-absorbing material having air permeability; and a skin material impregnated with a viscoelastic material and having air permeability, wherein the skin material is provided on a surface of the sound-absorbing material opposite to a sound source, and wherein the soundproof cover has a three-dimensional shape corresponding to an outer shape of the sound source.
1. A soundproof cover comprising:
a sound-absorbing material having air permeability; and
a skin material impregnated with a viscoelastic material and having air permeability, wherein the viscoelastic material comprises a vinyl acetate, a vinyl acetate-ethylene copolymer resin, an acrylic resin, an acrylonitrile-styrene-butadiene copolymer resin, a silicone resin or a moisture-curable urethane resin, and wherein an amount of the viscoelastic material is applied to the skin material such that an air permeation amount of the skin material is 0.01 to 10 cc/cm 2 ×sec.,
wherein the skin material is provided on a surface of the sound-absorbing material opposite to a sound source, and
wherein the soundproof cover has a three-dimensional shape corresponding to an outer shape of the sound source.
2. The soundproof cover according to claim 1 , which has a thin flat part comprising a lamination of the sound-absorbing material and the skin material and being formed over a predetermined width of an outer circumference of the soundproof cover.
3. The soundproof cover according to claim 1 , wherein the sound-absorbing material comprises a porous felt, a communicating resin foam, a communicating rubber foam, or an inorganic short fiber integrated body.
4. The soundproof cover according to claim 1 , wherein the skin material comprises a woven fabric or a nonwoven fabric.
5. The soundproof cover according to claim 1 , which is for automobiles or for industrial machines.
6. The soundproof cover according to claim 1 , wherein the skin material has a basis weight of 50 to 600 g/cm 2 .