CN103321311A - Laminating 3D (three-dimensional) sound absorber and preparation method thereof - Google Patents
Laminating 3D (three-dimensional) sound absorber and preparation method thereof Download PDFInfo
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- CN103321311A CN103321311A CN2013102427882A CN201310242788A CN103321311A CN 103321311 A CN103321311 A CN 103321311A CN 2013102427882 A CN2013102427882 A CN 2013102427882A CN 201310242788 A CN201310242788 A CN 201310242788A CN 103321311 A CN103321311 A CN 103321311A
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- polyester staple
- acoustic
- absorbent
- staple fiber
- overlay film
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Abstract
The invention discloses a laminating 3D (three-dimensional) sound absorber and a preparation method thereof. The laminating 3D sound absorber comprises a covering layer, a first polyester staple fiber mesh layer and a fiber cotton layer which are sequentially compounded, needled holes are uniformly distributed in the surface of the fiber cotton layer, the hole diameter of each needled hole is not larger than 2mm, the depth of each needled hole is larger than two thirds of the thickness of the fiber cotton layer, and needling density is 1.0 needle/cm<2>-1.5 needles/cm<2>. Recyclable polyester fibers are used as raw materials and do not contain harmful substances, the harmful substances cannot be released, the materials can be recycled, and fiber cotton and coverings are adhered together through molten first polyester staple fibers. After the laminating 3D sound absorber is attached onto a wall, a cavity can be formed by the laminating 3D sound absorber and the wall, keels are omitted, and vibration transfer of sound is decreased, so that sound absorption and noise reduction effects are preferably achieved. The laminating 3D sound absorber is fine in sound absorption effect, and particularly, low-frequency sound absorption effects are obviously improved.
Description
Technical field
The present invention relates to a kind of overlay film 3D acoustic(al)absorbent and preparation method thereof, belong to building materials component and construction field.
Background technology
Suspended absorber requires and sound source characteristic according to the use character of building, area, floor height, form of structure, decoration, and multiple shapes such as tabular, square shape, bar shape, coniform and sphere-like can be arranged.Wherein tabular structure is the simplest, uses the most general.
The shaped structure more complicated of existing sound absorber, and the influence of a lot of constructions of existence and acoustic efficiency, the appearance effect of acoustic(al)absorbent is relatively more dull, can not play the effect of decoration, effect neither be clearly aspect low frequency absorption, and the manufacturing process complexity needs multiple working procedure just can finish.
Summary of the invention
The purpose of this invention is to provide a kind of overlay film 3D acoustic(al)absorbent and preparation method thereof.
For solving the problems of the technologies described above, technical scheme of the present invention is:
A kind of overlay film 3D acoustic(al)absorbent comprises compound successively blanket layer, first polyester staple fiber stratum reticulare and the fibrage; The cellucotton laminar surface is evenly distributed with pinprick, and the aperture of pinprick is not more than 2mm, and the degree of depth of acupuncture is greater than 2/3rds of the cellucotton layer thickness, and needling density is 1.0 pins/cm
2～1.5 pins/cm
2
In order to improve the sound-absorbing effect of overlay film 3D acoustic(al)absorbent, the cellucotton layer comprises that the first polyester staple fibers peacekeeping is evenly distributed on second polyester staple fiber or the Fypro in first polyester staple fiber.
Above-mentioned first polyester staple fiber refers to that fusing point is 180 ℃～210 ℃ polyester staple fibers; Second polyester staple fiber refers to that fusing point is 240 ℃～270 ℃ polyester staple fiber.
In order to improve the sound-absorbing effect of overlay film 3D acoustic(al)absorbent, guarantee the intensity of 3D acoustic(al)absorbent simultaneously, the quality of the first polyester staple fiber stratum reticulare is 2%～6% of cellucotton layer quality;
The applicant finds after deliberation, and the acoustic(al)absorbent of said structure is compared with acoustic(al)absorbent of the prior art, and sound-absorbing effect has had tangible lifting.
In order to reach better sound-absorbing effect, in the cellucotton layer, the mass ratio of second polyester staple fiber or Fypro and first polyester staple fiber is (1:1)～(1:3).
For economical with materials, guarantee sound-absorbing effect simultaneously, the thickness of overlay film 3D acoustic(al)absorbent is 5mm～15mm.
Install for convenience, overlay film 3D acoustic(al)absorbent is uncovered rectangular structure, and the length of overlay film 3D acoustic(al)absorbent and the wide 600mm～1000mm that is highly are 45mm～100mm.
Be easy to get for convenience, guarantee product quality simultaneously, blanket layer is the woven face bed of material or leather layer.
The preparation method of above-mentioned overlay film 3D acoustic(al)absorbent comprises the following steps that order is joined:
(a) with the first polyester staple fibers peacekeeping fiber A mixing, get composite fibre; Described fiber A is second polyester staple fiber or Fypro; The fusing point of first polyester staple fiber is 180 ℃～210 ℃; The fusing point of second polyester staple fiber is 240 ℃～270 ℃;
(b) with composite fibre shredding, combing, form fleece;
(c) fiber Netcom, roll-in are got cellucotton; The needling density of described acupuncture is 1.0 pins/cm
2～1.5 pins/cm
2Roll-in pressure during roll-in is 0.8Mpa～1.2Mpa, and roll-in speed is 1.1m/min～1.3m/min;
(d) first polyester staple fiber is carried out shredding, combing, make the first polyester staple fiber net; The density of the first polyester fiber net is 40g/m
2～70g/m
2
(e) the first polyester staple fiber net with step (d) is covered with on the cellucotton of step (c);
(f) with the heat treatment of step (e) products obtained therefrom; Described heat treatment temperature is 190 ℃～215 ℃, and heat treatment time is 2min～3min;
(g) overburden is covered on step (f) products obtained therefrom, overburden is adjacent with the first polyester staple fiber net;
(h) (g) products obtained therefrom is entered moulding press and push through mould, can make overlay film 3D acoustic(al)absorbent, the pressure of described moulding press is 1.47 * 10
5N/m
2～2.94 * 10
5N/m
2, the pressing mold time is 10s～15s.
For sound-absorbing effect and the intensity that improves product, in the step (a), the mass ratio of fiber A and first polyester staple fiber is (1:1)～(1:3), and in the step (c), the roller spacing is 20～50mm.
Above-mentioned blanket surface can arrange various required patterns such as leaf, stone, flower, personage, landscape, literal, to reach better decorative effect.
The application of above-mentioned overlay film 3D acoustic(al)absorbent, overlay film 3D acoustic(al)absorbent and form cavity structure when mounted between the body of wall.
The applicant finds after deliberation, and when the height of acoustic(al)absorbent was 45mm～100mm, it is best that the sound-absorbing effect of acoustic(al)absorbent reaches.
The technology that the present invention does not specify is prior art.
The present invention is raw material with the polyester fiber of reusable edible, and the fusion by first polyester staple fiber makes between fiber and is adhered to one another, owing to do not use adhesive, therefore, overlay film 3D acoustic(al)absorbent of the present invention does not contain hazardous substance, and can not discharge hazardous substances, and material is recyclable recycling also; Cellucotton and overburden are bonded together by first polyester staple fiber of fusion; The present invention can form cavity with body of wall after being affixed on overlay film 3D acoustic(al)absorbent on the wall, has saved keel, has reduced the vibration transmission of sound, thereby has better played the effect of sound absorption reduction; The environmental protection of this overlay film 3D acoustic(al)absorbent material therefor, easily recovery, the overlay film 3D acoustic(al)absorbent acoustically effective that makes is good, especially the bass acoustically effective is obviously improved; Surface coverage one deck fabric of overlay film 3D acoustic(al)absorbent of the present invention can play the excellent decoration effect, can change arbitrarily according to the style of the change shape of mould and fabric, obtains the figure of oneself needs; This overlay film 3D acoustic(al)absorbent is light, is easy to install.
Description of drawings
Fig. 1 is the sectional drawing of overlay film 3D acoustic(al)absorbent;
Among the figure, 1 is blanket layer, and 2 is the first polyester staple fiber stratum reticulare, and 3 is second polyester staple fiber, and 4 is Fypro, and 5 is the cellucotton layer.
The specific embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.
Embodiment 1
Overlay film 3D acoustic(al)absorbent as shown in Figure 1 comprises compound successively blanket layer, the first polyester staple fiber stratum reticulare and cellucotton layer; The cellucotton layer comprises that the first polyester staple fibers peacekeeping is evenly distributed on second polyester staple fiber in first polyester staple fiber; The quality of the first polyester staple fiber stratum reticulare is 2% of cellucotton layer quality; The fusing point of described first polyester staple fiber is 180 ℃; The fusing point of second polyester staple fiber is 258 ℃.
The ratio of second polyester staple fiber and first polyester staple fiber is 1:1 in the cellucotton layer.
The cellucotton laminar surface is evenly distributed with pinprick, and the aperture of pinprick is 1.8mm, and the degree of depth of acupuncture is 3/4ths of cellucotton layer thickness, and needling density is 1.2 pins/cm
2
The thickness of overlay film 3D acoustic(al)absorbent is 5mm, the long and wide 600mm that is.
Blanket layer is the woven face bed of material.
The preparation method of above-mentioned overlay film 3D acoustic(al)absorbent comprises the steps:
(a) the first polyester staple fibers peacekeeping, second polyester staple fiber is added in the raw material feeding unit, fiber mixes through feeding unit, and the ratio of second polyester staple fiber and first polyester staple fiber is 1:1;
(b) mixed fiber is at first carried out pre-shredding, agglomerated fiber together becomes loose; Carry out smart shredding after pre-shredding is finished, fiber is mixed uniformly; The compressed device of fiber after shredding is thrown carding equipment into, and fiber forms continuous fleece behind carding equipment;
(c) fleece is obtained the cellucotton body after by acupuncture, roll-in; The needling density of described acupuncture is 1.2 pins/cm
2Roll-in pressure during roll-in is 0.9Mpa, and roll-in speed is 1.20m/min, and the roller spacing is 25mm;
(d) first polyester staple fiber is carried out shredding, combing, make the first polyester staple fiber net; The density of the first polyester fiber net is 50g/m
2
(e) the first polyester staple fiber net that step (d) is handled is covered with on the cellucotton of step (c) processing;
(f) with the cellucotton heat treatment in baking oven after step (e) processing; Described heat treatment temperature is 190 ℃, and heat treatment time is 2min;
(g) the first polyester staple fiber net after dacron being covered step (f) and handling above; Described dacron 220g/m
2
(h) cellucotton after (g) processing is put on the moulding press, can makes overlay film 3D acoustic(al)absorbent through the mould extruding.The pressure of described moulding press is 1.66 * 10
5N/m
2, the pressing mold time is 10s;
The acoustic(al)absorbent that step (h) obtains namely can be used as finished product and dispatches from the factory behind side cut, test package.
Embodiment 2
Overlay film 3D acoustic(al)absorbent comprises compound successively blanket layer, the first polyester staple fiber stratum reticulare and cellucotton layer; The cellucotton layer comprises that the first polyester staple fibers peacekeeping is evenly distributed on second polyester staple fiber in first polyester staple fiber; The quality of the first polyester staple fiber stratum reticulare is 6% of cellucotton layer quality; The fusing point of described first polyester staple fiber is 188 ℃; The fusing point of second polyester staple fiber is 263 ℃.
The ratio of second polyester staple fiber and first polyester staple fiber is 1:2 in the cellucotton layer.
The cellucotton laminar surface is evenly distributed with pinprick, and the aperture of pinprick is 1.9mm, and the degree of depth of acupuncture is 3/4ths of cellucotton layer thickness, and needling density is 1.3 pins/cm
2
The thickness of overlay film 3D acoustic(al)absorbent is 15mm, the long and wide 1000mm that is.
Blanket layer is the woven face bed of material.
The preparation method of above-mentioned overlay film 3D acoustic(al)absorbent comprises the steps:
(a) the first polyester staple fibers peacekeeping, second polyester staple fiber is added in the raw material feeding unit, fiber mixes through feeding unit, and the ratio of second polyester staple fiber and first polyester staple fiber is 1:2;
(b) mixed fiber is at first carried out pre-shredding, agglomerated fiber together becomes loose; Carry out smart shredding after pre-shredding is finished, fiber is mixed uniformly; The compressed device of fiber after shredding is thrown carding equipment into, and fiber forms continuous fleece behind carding equipment;
(c) fleece is obtained the cellucotton body after by acupuncture, roll-in; The needling density of described acupuncture is 1.3 pins/cm
2Roll-in pressure during roll-in is 1.0Mpa, and roll-in speed is 1.12m/min, and the roller spacing is 30mm;
(d) first polyester staple fiber is carried out shredding, combing, make the first polyester staple fiber net; The density of the first polyester fiber net is 60g/m
2
(e) the first polyester staple fiber net that step (d) is handled is covered with on the cellucotton of step (c) processing;
(f) with the cellucotton heat treatment in baking oven after step (e) processing; Described heat treatment temperature is 195 ℃, and heat treatment time is 2min.
(g) the first polyester staple fiber net after dacron being covered step (f) and handling above; Described dacron 200g/m
2
(h) cellucotton after (g) processing is put on the moulding press, can makes overlay film 3D acoustic(al)absorbent through the mould extruding; The pressure of described moulding press is 2.58 * 10
5N/m
2, the pressing mold time is 12s.
The acoustic(al)absorbent that step (h) obtains namely can be used as finished product and dispatches from the factory behind side cut, test package.
Embodiment 3
Overlay film 3D acoustic(al)absorbent comprises compound successively blanket layer, the first polyester staple fiber stratum reticulare and cellucotton layer; The cellucotton layer comprises that the first polyester staple fibers peacekeeping is evenly distributed on second polyester staple fiber in first polyester staple fiber; The quality of the first polyester staple fiber stratum reticulare is 4% of cellucotton layer quality; The fusing point of described first polyester staple fiber is 198 ℃; The fusing point of second polyester staple fiber is 266 ℃.
The ratio of second polyester staple fiber and first polyester staple fiber is 1:2.2 in the cellucotton layer.
The cellucotton laminar surface is evenly distributed with pinprick, and the aperture of pinprick is 1.5mm, and the degree of depth of acupuncture is 4/5ths of cellucotton layer thickness, and needling density is 1.4 pins/cm
2
The thickness of overlay film 3D acoustic(al)absorbent is 10mm, the long and wide 800mm that is.
Blanket layer is the woven face bed of material.
The preparation method of last overlay film 3D acoustic(al)absorbent comprises the steps:
(a) the first polyester staple fibers peacekeeping, second polyester staple fiber is added in the raw material feeding unit, fiber mixes through feeding unit, and the ratio of second polyester staple fiber and first polyester staple fiber is 1:2.2;
(b) mixed fiber is at first carried out pre-shredding, agglomerated fiber together becomes loose; Carry out smart shredding after pre-shredding is finished, fiber is mixed uniformly; The compressed device of fiber after shredding is thrown carding equipment into, and fiber forms continuous fleece behind carding equipment;
(c) fleece is obtained the cellucotton body after by acupuncture, roll-in; The needling density of described acupuncture is 1.4 pins/cm
2Roll-in pressure during roll-in is 0.8Mpa, and roll-in speed is 1.25m/min, and the roller spacing is 40mm;
(d) first polyester staple fiber is carried out shredding, combing, make the first polyester staple fiber net; The density of the first polyester fiber net is 70g/m
2
(e) the first polyester staple fiber net that step (d) is handled is covered with on the cellucotton of step (c) processing;
(f) with the cellucotton heat treatment in baking oven after step (e) processing; Described heat treatment temperature is 200 ℃, and heat treatment time is 2.5min;
(g) the first polyester staple fiber net after dacron being covered step (f) and handling above; Described dacron 250g/m
2
(h) cellucotton after (g) processing is put on the moulding press, can makes overlay film 3D acoustic(al)absorbent through the mould extruding, the pressure of described moulding press is 2.64 * 10
5N/m
2, the pressing mold time is 11s;
The acoustic(al)absorbent that step (h) obtains namely can be used as finished product and dispatches from the factory behind side cut, test package.
Embodiment 4
Overlay film 3D acoustic(al)absorbent comprises compound successively blanket layer, the first polyester staple fiber stratum reticulare and cellucotton layer; The cellucotton layer comprises that the first polyester staple fibers peacekeeping is evenly distributed on the Fypro in first polyester staple fiber; The quality of the first polyester staple fiber stratum reticulare is 3% of cellucotton layer quality; The fusing point of described first polyester staple fiber is 202 ℃; The fusing point of second polyester staple fiber is 268 ℃.
The ratio of Fypro and first polyester staple fiber is 1:2.5 in the cellucotton layer.
The cellucotton laminar surface is evenly distributed with pinprick, and the aperture of pinprick is 1.8mm, and the degree of depth of acupuncture is 3/4ths of cellucotton layer thickness, and needling density is 1.5 pins/cm
2
The thickness of overlay film 3D acoustic(al)absorbent is 8mm, the long and wide 800mm that is.
Blanket layer is the woven face bed of material or leather layer.
The preparation method of above-mentioned overlay film 3D acoustic(al)absorbent comprises the steps:
(a) the first polyester staple fibers peacekeeping Fypro is added in the raw material feeding unit, fiber mixes through feeding unit, and the ratio of Fypro and first polyester staple fiber is 1:2.5;
(b) mixed fiber is at first carried out pre-shredding, agglomerated fiber together becomes loose; Carry out smart shredding after pre-shredding is finished, fiber is mixed uniformly; The compressed device of fiber after shredding is thrown carding equipment into, and fiber forms continuous fleece behind carding equipment;
(c) fleece is obtained the cellucotton body after by acupuncture, roll-in; The needling density of described acupuncture is 1.5 pins/cm
2Roll-in pressure during roll-in is 1.2Mpa, and roll-in speed is 1.20m/min, and the roller spacing is 50mm;
(d) first polyester staple fiber is carried out shredding, combing, make the first polyester staple fiber net; The density of the first polyester fiber net is 70g/m
2
(e) the first polyester staple fiber net that step (d) is handled is covered with on the cellucotton of step (c) processing;
(f) with the cellucotton heat treatment in baking oven after step (e) processing; Described heat treatment temperature is 210 ℃, and heat treatment time is 3min.
(g) the first polyester staple fiber net after dacron being covered step (f) and handling above; Described dacron 230g/m
2
(h) cellucotton after (g) processing is put on the moulding press, can makes the 3D acoustic(al)absorbent through the mould extruding; The pressure of described moulding press is 2.94 * 10
5N/m
2, the pressing mold time is 13s.
The acoustic(al)absorbent that step (e) obtains namely can be used as finished product and dispatches from the factory behind side cut, test package.
Below the sound absorbing capabilities of overlay film 3D acoustic(al)absorbent that the present invention is obtained detect, table 1 is the sound absorption coefficient of each product; The detection method employing standard of sound absorption coefficient is GB/T20247-2006 " acoustic absorptivity measurements of acoustic reverberation chamber ", checkout equipment: BK4418 type building acoustics analyzer; 25 ℃ of environment temperatures, humidity 80%.
Table 1 is the sound absorption coefficient of each product
Claims (10)
1. an overlay film 3D acoustic(al)absorbent is characterized in that: comprise compound successively blanket layer, the first polyester staple fiber stratum reticulare and cellucotton layer; The cellucotton laminar surface is evenly distributed with pinprick, and the aperture of pinprick is not more than 2mm, and the degree of depth of acupuncture is greater than 2/3rds of the cellucotton layer thickness, and needling density is 1.0～1.5 pins/cm
2
2. overlay film 3D acoustic(al)absorbent as claimed in claim 1, it is characterized in that: the cellucotton layer comprises that the first polyester staple fibers peacekeeping is evenly distributed on second polyester staple fiber or the Fypro in first polyester staple fiber.
3. overlay film 3D acoustic(al)absorbent as claimed in claim 1 or 2, it is characterized in that: the quality of the first polyester staple fiber stratum reticulare is 2%～6% of cellucotton layer quality.
4. overlay film 3D acoustic(al)absorbent as claimed in claim 2, it is characterized in that: in the cellucotton layer, the mass ratio of second polyester staple fiber or Fypro and first polyester staple fiber is (1:1)～(1:3).
5. overlay film 3D acoustic(al)absorbent as claimed in claim 1 or 2, it is characterized in that: the thickness of overlay film 3D acoustic(al)absorbent is 5mm～15mm.
6. overlay film 3D acoustic(al)absorbent as claimed in claim 1 or 2, it is characterized in that: overlay film 3D acoustic(al)absorbent is uncovered rectangular structure, the length of overlay film 3D acoustic(al)absorbent and the wide 600mm～1000mm that is highly are 45-100mm.
7. overlay film 3D acoustic(al)absorbent as claimed in claim 1 or 2, it is characterized in that: blanket layer is the woven face bed of material or leather layer.
8. the preparation method of any described overlay film 3D acoustic(al)absorbent of claim 1-7 is characterized in that: comprise the following steps that order is joined:
(a) with the first polyester staple fibers peacekeeping fiber A mixing, get composite fibre; Described fiber A is second polyester staple fiber or Fypro; The fusing point of first polyester staple fiber is 180 ℃～210 ℃; The fusing point of second polyester staple fiber is 240 ℃～270 ℃;
(b) with composite fibre shredding, combing, form fleece;
(c) fiber Netcom, roll-in are got cellucotton; The needling density of described acupuncture is 1.0 pins/cm
2～1.5 pins/cm
2Roll-in pressure during roll-in is 0.8Mpa～1.2Mpa, and roll-in speed is 1.1m/min～1.3m/min;
(d) first polyester staple fiber is carried out shredding, combing, make the first polyester staple fiber net; The density of the first polyester fiber net is 40g/m
2～70g/m
2
(e) the first polyester staple fiber net with step (d) is covered with on the cellucotton of step (c);
(f) with the heat treatment of step (e) products obtained therefrom; Described heat treatment temperature is 190 ℃～215 ℃, and heat treatment time is 2min～3min;
(g) overburden is covered on step (f) products obtained therefrom, overburden is adjacent with the first polyester staple fiber net;
(h) (g) products obtained therefrom is entered moulding press and push through mould, can make overlay film 3D acoustic(al)absorbent, the pressure of described moulding press is 1.47 * 10
5N/m
2～2.94 * 10
5N/m
2, the pressing mold time is 10s～15s.
9. method as claimed in claim 8, it is characterized in that: in the step (a), the mass ratio of fiber A and first polyester staple fiber is (1:1)～(1:3); In the step (c), the roller spacing is 20～50mm.
10. the application of any described overlay film 3D acoustic(al)absorbent of claim 1-7 is characterized in that: overlay film 3D acoustic(al)absorbent and forms cavity structure when mounted between the body of wall.
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|---|---|---|---|
| CN201310242788.2A CN103321311B (en) | 2013-06-19 | 2013-06-19 | A kind of overlay film 3D acoustic(al)absorbent and preparation method thereof |
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| CN103321311B CN103321311B (en) | 2015-11-18 |
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|---|---|---|---|---|
| CN103935090A (en) * | 2014-04-29 | 2014-07-23 | 张升锋 | Fabric sound-absorbing panel and manufacturing method thereof |
| WO2019094789A1 (en) * | 2017-11-13 | 2019-05-16 | Universal Fibers, Inc. | Method for the manufacture of vibration damping and/or sound attenuating materials |
| CN111648036A (en) * | 2020-06-05 | 2020-09-11 | 河北传媒学院 | Polyester fiber sound-absorbing body capable of absorbing harmful substances and preparation method thereof |
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| CN101736521A (en) * | 2009-12-22 | 2010-06-16 | 东华大学 | Method for preparing Chinese medicament dreg needling non-woven composite material |
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| CN203347041U (en) * | 2013-06-19 | 2013-12-18 | 苏州佰家丽新材料科技有限公司 | Film covering 3D sound absorber |
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| US4851283A (en) * | 1988-12-05 | 1989-07-25 | Monsanto Company | Headliners having improved sound-absorbing characteristics |
| JPH1115475A (en) * | 1997-06-20 | 1999-01-22 | Pan Chem Kk | Sound absorbing molded body |
| US20030134553A1 (en) * | 2002-01-14 | 2003-07-17 | L.S.I. (420) Import Export And Marketing Ltd. | Sound absorbing article |
| CN101736521A (en) * | 2009-12-22 | 2010-06-16 | 东华大学 | Method for preparing Chinese medicament dreg needling non-woven composite material |
| CN103154401A (en) * | 2010-10-07 | 2013-06-12 | 乐金华奥斯有限公司 | Gypsum panel having outstanding sound-absorbing properties and a production method therefor |
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|---|---|---|---|---|
| CN103935090A (en) * | 2014-04-29 | 2014-07-23 | 张升锋 | Fabric sound-absorbing panel and manufacturing method thereof |
| WO2019094789A1 (en) * | 2017-11-13 | 2019-05-16 | Universal Fibers, Inc. | Method for the manufacture of vibration damping and/or sound attenuating materials |
| CN111648036A (en) * | 2020-06-05 | 2020-09-11 | 河北传媒学院 | Polyester fiber sound-absorbing body capable of absorbing harmful substances and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103321311B (en) | 2015-11-18 |
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