Sound-absorbing textile composite
In an embodiment, the present invention provides a sound-absorbing textile composite, including: a) at least one open-pore support layer comprising coarse staple fibers having a titer of from 3 dtex to 17 dtex and fine staple fibers having a titer of from 0.3 dtex to 2.9 dtex, as scaffold fibers; and b) a microporous flow layer arranged on the support layer and including microfibers having a fiber diameter of less than 10 μm. A flow resistance of the sound-absorbing textile composite is from 250 Ns/m 3 to 5000 Ns/m 3 .
1. A sound-absorbing textile composite, comprising:
a) at least one open-pore support layer comprising coarse staple fibers having a titer of from 3 dtex to 17 dtex and fine staple fibers having a titer of from 0.3 dtex to 2.9 dtex, as scaffold fibers; and
b) a microporous flow layer arranged on the support layer and comprising microfibers having a fiber diameter of less than 10 μm,
wherein a flow resistance of the sound-absorbing textile composite is from 250 Ns/m 3 to 5000 Ns/m 3 , and
wherein the support layer has an air-to-fiber volume ratio of from 75:1 to 250:1.
2. The sound-absorbing textile composite according to claim 1 , wherein the sound-absorbing textile composite has a compressibility of from 70% to 100% and/or a resilience of from 70% to 100%.
3. The sound-absorbing textile composite according to claim 1 , wherein the support layer comprises a nonwoven.
4. The sound-absorbing textile composite according to claim 1 , wherein the support layer comprises at least partially fused binding fibers as further fibers.
5. The sound-absorbing textile composite according to claim 1 , wherein the support layer does not contain binding fibers and the support layer contains the coarse staple fibers in a proportion of from 50 wt. % to 90 wt. % based on a total weight of the support layer, or wherein the support layer contains binding fibers as further fibers and a proportion of coarse staple fibers is from 40 wt. % to 80 wt. % based on the total weight of the support layer.
6. The sound-absorbing textile composite according to claim 1 , wherein the support layer does not contain binding fibers and the support layer contains the fine staple fibers in a proportion of from 10 wt. % to 50 wt. % based on a total weight of the support layer, or wherein the support layer contains binding fibers as further fibers and a proportion of fine staple fibers is from 10 wt. % to 50 wt. % based on the total weight of the support layer.
7. The sound-absorbing textile composite according claim 1 , wherein the fine and coarse staple fibers used as scaffold fibers have, independently of one another, a staple length of from 20 mm to 80 mm.
8. The sound-absorbing textile composite according to claim 1 , wherein the support layer is bound by a binder, and wherein the binder comprises polyacrylates, polystyrenes, polyvinyl acetate-ethylene, polyurethanes and mixtures and copolymers thereof.
9. The sound-absorbing textile composite according to claim 1 , wherein the flow layer comprises microfibers having a titer of less than 10 μm, and wherein the microfibers comprises meltblown fibers.
10. The sound-absorbing textile composite according to claim 1 , wherein the sound-absorbing textile composite has a sound absorption coefficient of from 30% to 100% at 1000 Hz.
11. The sound-absorbing textile composite according to claim 1 , wherein the sound-absorbing textile composite has weight per unit area of from 50 g/m 2 to 350 g/m 2 .
12. The sound-absorbing textile composite according to claim 1 , wherein the sound-absorbing textile composite has a thickness of from 5 mm to 35 mm.
13. A vehicle comprising a panel in which the sound-absorbing textile composite according to claim 1 is arranged.
14. The sound-absorbing textile composite according to claim 1 , wherein the fine staple fibers have a titer of from 0.5 dtex to 2.9 dtex.
15. The sound-absorbing textile composite according to claim 1 , wherein the flow resistance of the sound-absorbing textile composite is from 250 Ns/m 3 to 2000 Ns/m3.
16. The sound-absorbing textile composite according to claim 2 , wherein the sound-absorbing textile composite has a compressibility of from 75% to 100%.
17. The sound-absorbing textile composite according to claim 16 , wherein the sound-absorbing textile composite has a compressibility of from 80% to 100%.
18. The sound-absorbing textile composite according to claim 2 , wherein the sound-absorbing textile composite has a resilience of from 75% to 100%.
19. A method for producing a textile composite having a flow resistance of from 250 Ns/m 3 to 5000 Ns/m 3 , the method comprising:
a) providing at least one open-pore support layer comprising coarse staple fibers having a titer of from 3 dtex to 17 dtex and fine staple fibers having a titer of from 0.3 dtex to 2.9 dtex as scaffold fibers, wherein the support layer has an air-to-fiber volume ratio of from 75:1 to 250:1;
b) providing a microporous flow layer comprising microfibers having a fiber diameter of less than 10 μm;
c) arranging the flow layer on the support layer;
d) connecting the support layer and the flow layer.