Low-frequency sound absorption needling non-woven composite materials and preparation method thereof and application thereof
A composite material and non-woven technology, which is applied in the direction of sound-emitting devices, instruments, building components, etc., can solve the problems of poor low-frequency sound-absorbing performance, and achieve the effect of improving low-frequency sound-absorbing performance, improving sound-absorbing performance, and good sound-absorbing performance
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Embodiment 1
[0028] According to the mass percentage, 90% of the kapok fiber and 10% of the hollow polyester fiber are mixed, opened, carded, formed into a web, reinforced with needles, wound, and cut to obtain the kapok fiber / hollow polyester nonwoven fabric. The nonwoven fabric has a thickness of 1cm and a bulk density of 190g / m 2 .
Embodiment 2
[0030] According to the mass percentage, 90% of the kapok fiber and 10% of the hollow polyester fiber are mixed, opened, carded, formed into a web, reinforced with needles, wound, and cut to obtain the kapok fiber / hollow polyester nonwoven fabric. The nonwoven fabric has a thickness of 3cm and a bulk density of 387g / m 2 .
Embodiment 3
[0032] According to the mass percentage, 90% of the kapok fiber and 10% of the hollow polyester fiber are mixed, opened, carded, formed into a web, reinforced with needles, wound, and cut to obtain the kapok fiber / hollow polyester nonwoven fabric. The nonwoven fabric has a thickness of 3cm and a bulk density of 387g / m 2 . Put a polyethylene film with a thickness of 0.08mm flatly on one side of the above-mentioned non-woven fiber web, and put them together in an oven to raise the temperature (110-130°C); take out the material and cool it down.
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