A film-coated 3D sound-absorbing body and its preparation method
A 3D and film-coated technology, applied in the field of film-coated 3D sound-absorbing body and its preparation, can solve the problems of not obvious low-frequency sound-absorbing effect, monotonous appearance effect of sound-absorbing body, complex forming structure of sound-absorbing body, etc., and achieve sound-absorbing effect Good, easy to install, sound absorption effect improved
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Embodiment 1
[0034] like figure 1 The film-coated 3D sound-absorbing body shown includes a sequentially compounded covering layer, a first polyester staple fiber web layer, and a fiber cotton layer; the fiber cotton layer includes the first polyester staple fibers and the first polyester staple fibers evenly distributed The second polyester staple fiber in; the quality of the first polyester staple fiber web layer is 2% of the fiber cotton layer quality; the melting point of the first polyester staple fiber is 180 ℃; the melting point of the second polyester staple fiber is 258°C.
[0035] The ratio of the second polyester staple fiber to the first polyester staple fiber in the fiber cotton layer is 1:1.
[0036] There are acupuncture holes evenly distributed on the surface of the fiber cotton layer, the diameter of the needle hole is 1.8mm, the depth of the needle punching is three quarters of the thickness of the fiber cotton layer, and the needle punching density is 1.2 needles / cm 2 ....
Embodiment 2
[0050] The film-coated 3D sound-absorbing body includes a sequentially compounded cover layer, a first polyester staple fiber web layer, and a fiber cotton layer; the fiber cotton layer includes the first polyester staple fiber and the second polyester staple fiber evenly distributed in the first polyester staple fiber Two polyester staple fibers; the quality of the first polyester staple fiber net layer is 6% of the fiber cotton layer quality; the melting point of the first polyester staple fibers is 188°C; the melting point of the second polyester staple fibers is 263°C .
[0051] The ratio of the second polyester staple fiber to the first polyester staple fiber in the fiber cotton layer is 1:2.
[0052]There are acupuncture holes evenly distributed on the surface of the fiber cotton layer, the hole diameter of the needle holes is 1.9mm, the depth of the needle punching is three quarters of the thickness of the fiber cotton layer, and the needle punching density is 1.3 needl...
Embodiment 3
[0066] The film-coated 3D sound-absorbing body includes a sequentially compounded cover layer, a first polyester staple fiber web layer, and a fiber cotton layer; the fiber cotton layer includes the first polyester staple fiber and the second polyester staple fiber evenly distributed in the first polyester staple fiber Two polyester staple fibers; the quality of the first polyester staple fiber net layer is 4% of the fiber cotton layer quality; the melting point of the first polyester staple fibers is 198 ° C; the melting point of the second polyester staple fibers is 266 ° C .
[0067] The ratio of the second polyester staple fiber to the first polyester staple fiber in the fiber cotton layer is 1:2.2.
[0068] There are acupuncture holes evenly distributed on the surface of the fiber cotton layer, the diameter of the needle hole is 1.5mm, the depth of acupuncture is 4 / 5 of the thickness of the fiber cotton layer, and the needle punching density is 1.4 needles / cm 2 .
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