CN203994891U - A kind of lamination acoustical cotton - Google Patents
A kind of lamination acoustical cotton Download PDFInfo
- Publication number
- CN203994891U CN203994891U CN201420488677.XU CN201420488677U CN203994891U CN 203994891 U CN203994891 U CN 203994891U CN 201420488677 U CN201420488677 U CN 201420488677U CN 203994891 U CN203994891 U CN 203994891U
- Authority
- CN
- China
- Prior art keywords
- acoustical cotton
- cotton body
- leading note
- acoustical
- sound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Building Environments (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model relates to a kind of lamination acoustical cotton, it comprises the first acoustical cotton body, thin layer, the second acoustical cotton body, described the first acoustical cotton body is provided with embedding several leading note holes wherein, the second acoustical cotton body is provided with embedding several leading note holes wherein, described leading note hole is surrounded by sound control glass, leading note hole embeds the first acoustical cotton body and the intrinsic bottom surface of the second acoustical cotton diameter is greater than its opening diameter, the angle that described leading note hole sidewall and the first acoustical cotton body side form is 45 ~ 60 °, the quality of the first acoustical cotton body and the second acoustical cotton body identical in quality, and its volume is less than the volume of the second acoustical cotton body.Utilize the acoustical cotton body of different densities to realize the absorption of the noise to intermediate frequency on the one hand; The angle that the cotton body of the sidewall of this leading note hole between its bottom surface and opening and sound side forms is on the other hand 45 ~ 60 °, and it is constantly weakened at leading note hole to make noise, thereby reaches the effect that improves acoustical cotton sound-absorbing.
Description
Technical field
The utility model relates to a kind of acoustical cotton structure, is specifically related to a kind of lamination acoustical cotton.
Background technology
Acoustical cotton can be divided into glass fibre acoustical cotton and polyester fiber acoustical cotton, and these two kinds of products are had nothing in common with each other, and sound-absorbing effect is substantially the same.But the not environmental protection of glass fibre, is not easy to construction, easily causes itch while touching people's skin.Car acpistocs acoustical cotton is the material being installed between automotive upholstery (comprising ceiling, door-plate, hat rack, luggage case etc.) and body of a motor car, have the features such as sound-absorbing, heat insulation, damping, therefore car acpistocs acoustical cotton generally adopts polyester fiber acoustical cotton fiber.The quality of acoustical cotton sound absorption qualities can directly affect the driver comfort of car load, and serious also can work the mischief to driver and crew's body and mind.At present, car acpistocs acoustical cotton simple in structure, is not coupled to the physical property that sound wave transmits, and therefore its attraction power is had a greatly reduced quality.
Noise spectrum at present common recognition is that 500Hz is low frequency below, 500 ~ 2000Hz is intermediate frequency, 2000Hz is high frequency above, and automobile acoustical absorption cotton is mainly the frequency range sound wave absorbing more than 2000HZ, its absorptivity reaches more than 80%, the absorptivity of the noise to intermediate frequency only has between 35%-50%, and intermediate frequency sound-absorbing effect is not obvious.Therefore be necessary to design a kind of to the higher acoustical cotton of mid-frequency noise absorptance rate.
Summary of the invention
The utility model object is to provide a kind of at the good lamination acoustical cotton of Mid Frequency sound-absorbing effect in order to overcome the deficiencies in the prior art.
For achieving the above object, the technical solution adopted in the utility model is: a kind of lamination acoustical cotton, it comprises the first acoustical cotton body being cascading, thin layer, the second acoustical cotton body, the side that described the first acoustical cotton body contacts with thin layer is provided with and embeds intrinsic several leading note holes of the first acoustical cotton, the side that described the second acoustical cotton body does not contact with thin layer is provided with and embeds intrinsic several leading note holes of the second acoustical cotton, described leading note hole is surrounded by sound control glass, described leading note hole embeds the first acoustical cotton body and the intrinsic bottom surface of the second acoustical cotton diameter is greater than its opening diameter, the angle that the sidewall of described leading note hole between its bottom surface and opening and the first acoustical cotton body or the second acoustical cotton body side form is 45 ~ 60 °, the quality of described the first acoustical cotton body and the second acoustical cotton body identical in quality, the volume of described the first acoustical cotton body is less than the volume of the second acoustical cotton body.
Optimally, described the first acoustical cotton body and the second acoustical cotton body are also laminated with respectively nonwoven layer.
Because technique scheme is used, the utility model compared with prior art has following advantages: the utility model lamination acoustical cotton, be laminated by the first acoustical cotton body, thin layer, the second acoustical cotton body on the one hand, and the first acoustical cotton bulk density, higher than the density of the second acoustical cotton body, utilizes the acoustical cotton body of different densities to realize the absorption of the noise to intermediate frequency; The angle that the cotton body of the sidewall of this leading note hole between its bottom surface and opening and sound side forms is on the other hand 45 ~ 60 °, in the time that entering in leading note hole, transmission sound can coordinate like this transfer law of sound wave, it is constantly weakened at leading note hole, thereby reach the effect that improves acoustical cotton sound-absorbing.
Brief description of the drawings
Accompanying drawing 1 is the top view of the utility model lamination acoustical cotton;
Accompanying drawing 2 is the A-A cutaway view of accompanying drawing 1;
Wherein, 1, the first acoustical cotton body; 1 ', the second acoustical cotton body; 2, leading note hole; 3, nonwoven layer; 4, thin layer.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model preferred embodiment is elaborated:
Lamination sound acoustical cotton as depicted in figs. 1 and 2, mainly comprises the first acoustical cotton body 1, thin layer 4 and the second acoustical cotton body 1 ' that are cascading.
Wherein, the side that the first acoustical cotton body 1 contacts with thin layer 4 is provided with side that several leading note hole 2, the second acoustical cotton bodies 1 ' of embedding in the first acoustical cotton body 1 do not contact with thin layer 4 and is provided with and embeds several interior leading note holes 2 of the second acoustical cotton body 1 '.Leading note hole 2 is surrounded by bottom surface, sidewall and opening three parts, and wherein sidewall and bottom surface are integrated sound control glasses and are embedded in the first acoustical cotton body 1 or the second acoustical cotton body 1 '.The bottom surface diameter that leading note hole 2 embeds in the first acoustical cotton body 1 and the second acoustical cotton body 1 ' is greater than its opening diameter, and the angle that its sidewall and the first acoustical cotton body 1 side, the second acoustical cotton body 1 ' side or thin layer 4 form is 45 ~ 60 °, in the time that entering in leading note hole, transmission sound can coordinate like this transfer law of sound wave, it is constantly weakened at leading note hole, improve thereby reach the effect that acoustical cotton attracts.And the quality of the first acoustical cotton body 1 and the second acoustical cotton body 1 ' is identical in quality, the volume of the first acoustical cotton body 1 is but less than the volume of the second acoustical cotton body 1 ', that is to say that the density of the first acoustical cotton body 1 is greater than the density of the second acoustical cotton body 1 ', utilize like this acoustical cotton body of different densities can realize the absorption of the noise to intermediate frequency, this is while passing through medium (different materials or different densities) because of sound wave, because the acoustic impedance ability of various media differs, present all good sound-absorbing effects of the each frequency range of low middle height).
In the present embodiment, the first acoustical cotton body 1 is the same with the material of the second acoustical cotton body 1 ', adopt terylene (PET) and the isotactic polypropylene (PP) of superfine fibre to form by adding a certain proportion of polyurethane (PU) auxiliary agent, the curled fiber that wherein isotactic polypropylene (PP) is hollow structure; The fineness of PET fiber and PP fiber is 1 ~ 3D, and fibre length is 38 ~ 45mm.The first acoustical cotton body 1 and the second acoustical cotton body 1 ' utilize the low melting point thin layer 4 in the middle of them to carry out hot melt laminating, employing hot blast mode is blown down the technique of suction and is made formation different densities on carrying out, thin layer 4 comprises the material such as polyamide (PA) and polyethylene (PE).On the other two sides of the first acoustical cotton body 1 and the second acoustical cotton body 1 ', be coated with nonwoven layer 3, can first weaken the vibration frequency of sound wave, thereby improve the sound absorbing power of acoustical cotton, and reach the coupling requirement of outward appearance and other automobile components.
Above-described embodiment is only explanation technical conceive of the present utility model and feature; its object is to allow person skilled in the art can understand content of the present utility model and implement according to this; can not limit protection domain of the present utility model with this; all equivalences of doing according to the utility model Spirit Essence change or modify, within all should being encompassed in protection domain of the present utility model.
Claims (2)
1. a lamination acoustical cotton, it is characterized in that: it comprises the first acoustical cotton body (1) being cascading, thin layer (4), the second acoustical cotton body (1 '), the side that described the first acoustical cotton body (1) contacts with thin layer (4) is provided with several leading note holes (2) that embed in the first acoustical cotton body (1), the side that described the second acoustical cotton body (1 ') does not contact with thin layer (4) is provided with several leading note holes (2) that embed in the second acoustical cotton body (1 '), described leading note hole (2) is surrounded by sound control glass, the bottom surface diameter that described leading note hole (2) embeds in the first acoustical cotton body (1) and the second acoustical cotton body (1 ') is greater than its opening diameter, the angle that the sidewall of described leading note hole (2) between its bottom surface and opening and the first acoustical cotton body (1) or the second acoustical cotton body (1 ') side form is 45 ~ 60 °, the quality of described the first acoustical cotton body (1) and the second acoustical cotton body (1 ') identical in quality, the volume of described the first acoustical cotton body (1) is less than the volume of the second acoustical cotton body (1 ').
2. high sound-absorbing acoustical cotton according to claim 1, is characterized in that: described the first acoustical cotton body (1) and the second acoustical cotton body (1 ') are also laminated with respectively nonwoven layer (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420488677.XU CN203994891U (en) | 2014-08-28 | 2014-08-28 | A kind of lamination acoustical cotton |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420488677.XU CN203994891U (en) | 2014-08-28 | 2014-08-28 | A kind of lamination acoustical cotton |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203994891U true CN203994891U (en) | 2014-12-10 |
Family
ID=52034949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420488677.XU Expired - Fee Related CN203994891U (en) | 2014-08-28 | 2014-08-28 | A kind of lamination acoustical cotton |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203994891U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105564453A (en) * | 2016-01-06 | 2016-05-11 | 广东高登铝业有限公司 | Section for high-speed rail motor train unit trains |
| CN106166875A (en) * | 2016-08-08 | 2016-11-30 | 常熟市嘉淀纺织有限公司 | A kind of environment friendly acoustical absorption is cotton |
-
2014
- 2014-08-28 CN CN201420488677.XU patent/CN203994891U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105564453A (en) * | 2016-01-06 | 2016-05-11 | 广东高登铝业有限公司 | Section for high-speed rail motor train unit trains |
| CN106166875A (en) * | 2016-08-08 | 2016-11-30 | 常熟市嘉淀纺织有限公司 | A kind of environment friendly acoustical absorption is cotton |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20160121588A1 (en) | High Sound Absorption Coefficient Expanded PTFE Composite Fiber Cotton | |
| CN105383135A (en) | Multi-layered noise absorbing and insulating material having air-permeability | |
| CN203994891U (en) | A kind of lamination acoustical cotton | |
| CN205130511U (en) | Car gadget combined material | |
| CN106394424A (en) | Sound absorbing board of automobile roof | |
| CN107054234A (en) | A kind of lightweight car door waterproof membrane part and its preparation technology with heat preservation and soundproof noise reduction capability | |
| CN205380945U (en) | Novel thermal -insulated damping material board of sound insulation of making an uproar falls | |
| CN201849365U (en) | Automobile cab carpet | |
| CN204235965U (en) | A kind of car heat insulating pad of noise reduction | |
| CN203996031U (en) | A kind of high sound-absorbing acoustical cotton | |
| CN203637728U (en) | Vibration reducing and sound absorbing pad for automotive door panel | |
| CN203438952U (en) | Noise-insulation and heat-insulation pad and vehicle | |
| CN203157884U (en) | Sound-proof pad of composite structure and used on car roof | |
| CN203020405U (en) | Automobile engine room | |
| CN205997813U (en) | A kind of waterproof Sound-proof material | |
| CN203267395U (en) | Magnetic-induction sound absorption product | |
| CN206510525U (en) | A kind of environmental-protection type sound-absorbing cotton | |
| CN207565507U (en) | A kind of armored ambulance interior structure with heat-insulation noise-reduction | |
| CN202363103U (en) | Soft sound isolating box | |
| CN202944281U (en) | Noise reduction type car roof interior trim part | |
| CN202669684U (en) | Heat-sound insulation board for automobile compartment | |
| CN202610513U (en) | Composite fiber felt | |
| CN201465541U (en) | Composite perforated noise reduction board | |
| CN202063093U (en) | Automobile cab internal front wall sound insulating pad | |
| CN206485008U (en) | A kind of sound-absorbing Sound-proof automotive carpet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20180828 |