CN103321311B - A kind of overlay film 3D acoustic(al)absorbent and preparation method thereof - Google Patents
A kind of overlay film 3D acoustic(al)absorbent and preparation method thereof Download PDFInfo
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- CN103321311B CN103321311B CN201310242788.2A CN201310242788A CN103321311B CN 103321311 B CN103321311 B CN 103321311B CN 201310242788 A CN201310242788 A CN 201310242788A CN 103321311 B CN103321311 B CN 103321311B
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Abstract
The present invention discloses a kind of overlay film 3D acoustic(al)absorbent and preparation method thereof, overlay film 3D acoustic(al)absorbent, comprises the blanket layer of compound successively, the first polyester staple fiber stratum reticulare and fibrage; Cellucotton layer surface uniform is 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 cellucotton layer thickness, and needling density is 1.0 pins/cm
2~ 1.5 pins/cm
2.The present invention for raw material does not contain hazardous substance, and can not discharge hazardous substances with the polyester fiber of reusable edible, and material is recyclable recycling also; Cellucotton and overburden are bonded together by the first polyester staple fiber of melting; Overlay film 3D acoustic(al)absorbent is affixed on after on wall by the present invention, can form cavity, eliminate keel with body of wall, decreases the vibration passing of sound, thus better serves the effect of sound absorption reduction; This overlay film 3D acoustic(al)absorbent acoustically effective is good, especially significantly improves bass acoustically effective.
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, according to the character of use of building, area, floor height, form of structure, finishing requirements and sound source characteristic, can have the various shape such as tabular, square, bar shape, coniform and sphere-like.Wherein the structure of tabular is the simplest, applies the most general.
The shaped structure more complicated of existing sound absorber, and the impact that there is a lot of construction and acoustic efficiency, the appearance effect of acoustic(al)absorbent is more dull, the effect of decoration can not be played, in low frequency absorption, effect neither clearly, and manufacturing process is complicated, needs multiple working procedure just can complete.
Summary of the invention
The object 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 the blanket layer of compound successively, the first polyester staple fiber stratum reticulare and fibrage; Cellucotton layer surface uniform is 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 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, cellucotton layer comprises the first polyester staple fibers peacekeeping and is evenly distributed on the second polyester staple fiber in the first polyester staple fiber or Fypro.
Above-mentioned first polyester staple fiber refers to that fusing point is 180 DEG C ~ 210 DEG C polyester staple fibers; Second polyester staple fiber refers to that fusing point is the polyester staple fiber of 240 DEG C ~ 270 DEG C.
In order to improve the sound-absorbing effect of overlay film 3D acoustic(al)absorbent, ensure the intensity of 3D acoustic(al)absorbent, the quality of the first polyester staple fiber stratum reticulare is 2% ~ 6% of cellucotton layer quality simultaneously;
Applicant finds after deliberation, the acoustic(al)absorbent of said structure, and compared with acoustic(al)absorbent of the prior art, sound-absorbing effect has had obvious lifting.
In order to reach better sound-absorbing effect, in cellucotton layer, the mass ratio of the second polyester staple fiber or Fypro and the first polyester staple fiber is (1:1) ~ (1:3).
In order to save material, ensure sound-absorbing effect, the thickness of overlay film 3D acoustic(al)absorbent is 5mm ~ 15mm simultaneously.
Conveniently install, overlay film 3D acoustic(al)absorbent is uncovered rectangular structure, the length of overlay film 3D acoustic(al)absorbent and be widely 600mm ~ 1000mm, is highly 45mm ~ 100mm.
Conveniently be easy to get, ensure 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 connects:
A first polyester staple fibers peacekeeping fiber A mixes by (), obtain composite fibre; Described fiber A is the second polyester staple fiber or Fypro; The fusing point of the first polyester staple fiber is 180 DEG C ~ 210 DEG C; The fusing point of the second polyester staple fiber is 240 DEG C ~ 270 DEG C;
B (), by composite fibre shredding, combing, forms fleece;
C fiber Netcom, roll-in are obtained cellucotton by (); The needling density of described acupuncture is 1.0 pins/cm
2~ 1.5 pins/cm
2; Rolling 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 by (), obtained first polyester staple fiber net; The density of the first polyester fiber net is 40g/m
2~ 70g/m
2;
E first polyester staple fiber net of step (d) is covered with on the cellucotton of step (c) by ();
F () is by the heat treatment of step (e) products obtained therefrom; Described heat treatment temperature is 190 DEG C ~ 215 DEG C, and heat treatment time is 2min ~ 3min;
G overburden covers on step (f) products obtained therefrom by (), overburden is adjacent with the first polyester staple fiber net;
H (g) products obtained therefrom is entered moulding press and extrudes through mould by (), can obtain overlay film 3D acoustic(al)absorbent, and 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.
In order to improve sound-absorbing effect and the intensity of product, in step (a), the mass ratio of fiber A and the first polyester staple fiber is (1:1) ~ (1:3), and in step (c), roller spacing is 20 ~ 50mm.
Above-mentioned blanket surface can arrange the various required pattern such as leaf, stone, flower, personage, landscape, word, to reach better decorative effect.
The application of above-mentioned overlay film 3D acoustic(al)absorbent, overlay film 3D acoustic(al)absorbent when mounted, and forms cavity structure between body of wall.
Applicant finds after deliberation, and when the height of acoustic(al)absorbent is 45mm ~ 100mm, the sound-absorbing effect of acoustic(al)absorbent reaches best.
The not specified technology of the present invention is prior art.
The present invention, makes to be adhered to one another between fiber by the melting of the first polyester staple fiber, owing to not using adhesive for raw material with the polyester fiber of reusable edible, 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 the first polyester staple fiber of melting; Overlay film 3D acoustic(al)absorbent is affixed on after on wall by the present invention, can form cavity, eliminate keel with body of wall, decreases the vibration passing of sound, thus better serves the effect of sound absorption reduction; The environmental protection of this overlay film 3D acoustic(al)absorbent material therefor, easily reclaim, obtained overlay film 3D acoustic(al)absorbent acoustically effective is good, especially significantly improves bass acoustically effective; Surface coverage one deck fabric of overlay film 3D acoustic(al)absorbent of the present invention, can play good decorative effect, can change arbitrarily, obtain the figure oneself needed according to the change shape of mould and the style of fabric; This overlay film 3D acoustic(al)absorbent is light, is easy to install.
Accompanying drawing explanation
Fig. 1 is the sectional drawing of overlay film 3D acoustic(al)absorbent;
In figure, 1 is blanket layer, and 2 is the first polyester staple fiber stratum reticulare, and 3 is the second polyester staple fiber, and 4 is Fypro, and 5 is cellucotton layer.
Detailed description of the invention
In order to understand the present invention better, illustrate content of the present invention further below in conjunction with embodiment, but content of the present invention is not only confined to the following examples.
Embodiment 1
Overlay film 3D acoustic(al)absorbent as shown in Figure 1, comprises the blanket layer of compound successively, the first polyester staple fiber stratum reticulare and cellucotton layer; Cellucotton layer comprises the first polyester staple fibers peacekeeping and is evenly distributed on the second polyester staple fiber in the 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 DEG C; The fusing point of the second polyester staple fiber is 258 DEG C.
In cellucotton layer, the ratio of the second polyester staple fiber and the first polyester staple fiber is 1:1.
Cellucotton layer surface uniform is 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, long and is widely 600mm.
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 first polyester staple fibers peacekeeping second polyester staple fiber adds in raw material feeding unit by (), fiber mixes through feeding unit, and the ratio of the second polyester staple fiber and the first polyester staple fiber is 1:1;
B first mixed fiber is carried out pre-shredding by (), agglomerated fiber together becomes loose; Carry out smart shredding after pre-shredding completes, fiber is mixed uniformly; The compressed device of fiber after shredding, throws carding equipment into, and fiber forms continuous print fleece after carding equipment;
(c) by fleece by obtaining cellucotton body after acupuncture, roll-in; The needling density of described acupuncture is 1.2 pins/cm
2; Rolling pressure during roll-in is 0.9Mpa, and roll-in speed is 1.20m/min, and roller spacing is 25mm;
D first polyester staple fiber is carried out shredding, combing by (), obtained 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) processes by () is covered with on the cellucotton that step (c) processes;
F () is by the cellucotton heat treatment in an oven after step (e) process; Described heat treatment temperature is 190 DEG C, and heat treatment time is 2min;
G dacron covers above the first polyester staple fiber net after step (f) process by (); Described dacron 220g/m
2;
H cellucotton after (g) process is put on moulding press by (), can obtain overlay film 3D acoustic(al)absorbent through mould extruding.The pressure of described moulding press is 1.66 × 10
5n/m
2, the pressing mold time is 10s;
Namely the acoustic(al)absorbent that step (h) obtains can be used as finished product and dispatches from the factory after trimming, test package.
Embodiment 2
Overlay film 3D acoustic(al)absorbent, comprises the blanket layer of compound successively, the first polyester staple fiber stratum reticulare and cellucotton layer; Cellucotton layer comprises the first polyester staple fibers peacekeeping and is evenly distributed on the second polyester staple fiber in the 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 DEG C; The fusing point of the second polyester staple fiber is 263 DEG C.
In cellucotton layer, the ratio of the second polyester staple fiber and the first polyester staple fiber is 1:2.
Cellucotton layer surface uniform is 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, long and is widely 1000mm.
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 first polyester staple fibers peacekeeping second polyester staple fiber adds in raw material feeding unit by (), fiber mixes through feeding unit, and the ratio of the second polyester staple fiber and the first polyester staple fiber is 1:2;
B first mixed fiber is carried out pre-shredding by (), agglomerated fiber together becomes loose; Carry out smart shredding after pre-shredding completes, fiber is mixed uniformly; The compressed device of fiber after shredding, throws carding equipment into, and fiber forms continuous print fleece after carding equipment;
(c) by fleece by obtaining cellucotton body after acupuncture, roll-in; The needling density of described acupuncture is 1.3 pins/cm
2; Rolling pressure during roll-in is 1.0Mpa, and roll-in speed is 1.12m/min, and roller spacing is 30mm;
D first polyester staple fiber is carried out shredding, combing by (), obtained 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) processes by () is covered with on the cellucotton that step (c) processes;
F () is by the cellucotton heat treatment in an oven after step (e) process; Described heat treatment temperature is 195 DEG C, and heat treatment time is 2min.
G dacron covers above the first polyester staple fiber net after step (f) process by (); Described dacron 200g/m
2.
H cellucotton after (g) process is put on moulding press by (), can obtain overlay film 3D acoustic(al)absorbent through mould extruding; The pressure of described moulding press is 2.58 × 10
5n/m
2, the pressing mold time is 12s.
Namely the acoustic(al)absorbent that step (h) obtains can be used as finished product and dispatches from the factory after trimming, test package.
Embodiment 3
Overlay film 3D acoustic(al)absorbent, comprises the blanket layer of compound successively, the first polyester staple fiber stratum reticulare and cellucotton layer; Cellucotton layer comprises the first polyester staple fibers peacekeeping and is evenly distributed on the second polyester staple fiber in the 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 DEG C; The fusing point of the second polyester staple fiber is 266 DEG C.
In cellucotton layer, the ratio of the second polyester staple fiber and the first polyester staple fiber is 1:2.2.
Cellucotton layer surface uniform is 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, long and is widely 800mm.
Blanket layer is the woven face bed of material.
The preparation method of upper overlay film 3D acoustic(al)absorbent, comprises the steps:
A first polyester staple fibers peacekeeping second polyester staple fiber adds in raw material feeding unit by (), fiber mixes through feeding unit, and the ratio of the second polyester staple fiber and the first polyester staple fiber is 1:2.2;
B first mixed fiber is carried out pre-shredding by (), agglomerated fiber together becomes loose; Carry out smart shredding after pre-shredding completes, fiber is mixed uniformly; The compressed device of fiber after shredding, throws carding equipment into, and fiber forms continuous print fleece after carding equipment;
(c) by fleece by obtaining cellucotton body after acupuncture, roll-in; The needling density of described acupuncture is 1.4 pins/cm
2; Rolling pressure during roll-in is 0.8Mpa, and roll-in speed is 1.25m/min, and roller spacing is 40mm;
D first polyester staple fiber is carried out shredding, combing by (), obtained 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) processes by () is covered with on the cellucotton that step (c) processes;
F () is by the cellucotton heat treatment in an oven after step (e) process; Described heat treatment temperature is 200 DEG C, and heat treatment time is 2.5min;
G dacron covers above the first polyester staple fiber net after step (f) process by (); Described dacron 250g/m
2;
H cellucotton after (g) process is put on moulding press by (), can obtain overlay film 3D acoustic(al)absorbent through mould extruding, the pressure of described moulding press is 2.64 × 10
5n/m
2, the pressing mold time is 11s;
Namely the acoustic(al)absorbent that step (h) obtains can be used as finished product and dispatches from the factory after trimming, test package.
Embodiment 4
Overlay film 3D acoustic(al)absorbent, comprises the blanket layer of compound successively, the first polyester staple fiber stratum reticulare and cellucotton layer; Cellucotton layer comprises the first polyester staple fibers peacekeeping and is evenly distributed on Fypro in the 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 DEG C; The fusing point of the second polyester staple fiber is 268 DEG C.
In cellucotton layer, the ratio of Fypro and the first polyester staple fiber is 1:2.5.
Cellucotton layer surface uniform is 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, long and is widely 800mm.
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 first polyester staple fibers peacekeeping Fypro adds in raw material feeding unit by (), fiber mixes through feeding unit, and the ratio of Fypro and the first polyester staple fiber is 1:2.5;
B first mixed fiber is carried out pre-shredding by (), agglomerated fiber together becomes loose; Carry out smart shredding after pre-shredding completes, fiber is mixed uniformly; The compressed device of fiber after shredding, throws carding equipment into, and fiber forms continuous print fleece after carding equipment;
(c) by fleece by obtaining cellucotton body after acupuncture, roll-in; The needling density of described acupuncture is 1.5 pins/cm
2; Rolling pressure during roll-in is 1.2Mpa, and roll-in speed is 1.20m/min, and roller spacing is 50mm;
D first polyester staple fiber is carried out shredding, combing by (), obtained 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) processes by () is covered with on the cellucotton that step (c) processes;
F () is by the cellucotton heat treatment in an oven after step (e) process; Described heat treatment temperature is 210 DEG C, and heat treatment time is 3min.
G dacron covers above the first polyester staple fiber net after step (f) process by (); Described dacron 230g/m
2.
H cellucotton after (g) process is put on moulding press by (), can obtain 3D acoustic(al)absorbent through mould extruding; The pressure of described moulding press is 2.94 × 10
5n/m
2, the pressing mold time is 13s.
Namely the acoustic(al)absorbent that step (e) obtains can be used as finished product and dispatches from the factory after trimming, test package.
Detect the sound absorbing capabilities of the overlay film 3D acoustic(al)absorbent that the present invention obtains below, table 1 is the sound absorption coefficient of each product; The detection method of sound absorption coefficient adopts standard to be GB/T20247-2006 " acoustic absorptivity measurements of acoustic reverberation room ", checkout equipment: BK4418 type building acoustics analyzer; Environment temperature 25 DEG C, humidity 80%.
Table 1 is the sound absorption coefficient of each product
Claims (8)
1. an overlay film 3D acoustic(al)absorbent, is characterized in that: comprise the blanket layer of compound successively, the first polyester staple fiber stratum reticulare and cellucotton layer; Cellucotton layer surface uniform is 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 cellucotton layer thickness, and needling density is 1.0 ~ 1.5 pins/cm
2; The quality of the first polyester staple fiber stratum reticulare is 2% ~ 6% of cellucotton layer quality;
The preparation method of above-mentioned overlay film 3D acoustic(al)absorbent, comprises the following steps that order connects:
A first polyester staple fibers peacekeeping fiber A mixes by (), obtain composite fibre; Described fiber A is the second polyester staple fiber or Fypro; The fusing point of the first polyester staple fiber is 180 DEG C ~ 210 DEG C; The fusing point of the second polyester staple fiber is 240 DEG C ~ 270 DEG C;
B (), by composite fibre shredding, combing, forms fleece;
C fiber Netcom, roll-in are obtained cellucotton by (); The needling density of described acupuncture is 1.0 pins/cm
2~ 1.5 pins/cm
2; Rolling 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 by (), obtained first polyester staple fiber net; The density of the first polyester fiber net is 40g/m
2~ 70g/m
2;
E first polyester staple fiber net of step (d) is covered with on the cellucotton of step (c) by ();
F () is by the heat treatment of step (e) products obtained therefrom; Described heat treatment temperature is 190 DEG C ~ 215 DEG C, and heat treatment time is 2min ~ 3min;
G overburden covers on step (f) products obtained therefrom by (), overburden is adjacent with the first polyester staple fiber net;
H (g) products obtained therefrom is entered moulding press and extrudes through mould by (), can obtain overlay film 3D acoustic(al)absorbent, and 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.
2. overlay film 3D acoustic(al)absorbent as claimed in claim 1, is characterized in that: cellucotton layer comprises the first polyester staple fibers peacekeeping and is evenly distributed on the second polyester staple fiber in the first polyester staple fiber or Fypro.
3. overlay film 3D acoustic(al)absorbent as claimed in claim 2, it is characterized in that: in cellucotton layer, the mass ratio of the second polyester staple fiber or Fypro and the first polyester staple fiber is (1:1) ~ (1:3).
4. the overlay film 3D acoustic(al)absorbent as described in claim 1-3 any one, is characterized in that: the thickness of overlay film 3D acoustic(al)absorbent is 5mm ~ 15mm.
5. the overlay film 3D acoustic(al)absorbent as described in claim 1-3 any one, is characterized in that: overlay film 3D acoustic(al)absorbent is uncovered rectangular structure, the length of overlay film 3D acoustic(al)absorbent and be widely 600mm ~ 1000mm, is highly 45-100mm.
6. the overlay film 3D acoustic(al)absorbent as described in claim 1-3 any one, is characterized in that: blanket layer is the woven face bed of material or leather layer.
7. the overlay film 3D acoustic(al)absorbent as described in claim 1-3 any one, it is characterized in that: in step (c), roller spacing is 20 ~ 50mm.
8. the application of the overlay film 3D acoustic(al)absorbent described in claim 1-7 any one, is characterized in that: overlay film 3D acoustic(al)absorbent when mounted, and forms cavity structure between 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 true CN103321311B (en) | 2015-11-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030134553A1 (en) * | 2002-01-14 | 2003-07-17 | L.S.I. (420) Import Export And Marketing Ltd. | Sound absorbing article |
-
2013
- 2013-06-19 CN CN201310242788.2A patent/CN103321311B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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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