CN103177719B - Full range acoustical cotton - Google Patents
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- CN103177719B CN103177719B CN201110435432.1A CN201110435432A CN103177719B CN 103177719 B CN103177719 B CN 103177719B CN 201110435432 A CN201110435432 A CN 201110435432A CN 103177719 B CN103177719 B CN 103177719B
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Abstract
The present invention relates to a kind of full range acoustical cotton, have two-layer or three-decker, the full range acoustical cotton of double-layer structure is made up of melt-blown high polymer fibre layer and eptfe layer; Three layers of full range acoustical cotton are made up of the two-sided compound eptfe layer of melt-blown high polymer fibre layer, or are made up of the melt-blown high polymer fibre layer of the two-sided compound of eptfe layer.High-performance of the present invention composite microporous thin layer new material is provided with better full range sound absorbing power; Environment-protecting asepsis free from extraneous odour, non-volatility gas, pollution-free, not containing carcinogen; Operation, without the pungency of similar glass fibre to skin, can be carried out Punching Technology, not produce dust chip etc.; Adopt melt-blown high polymer fibre layer and this bi-material of eptfe layer, the acoustical cotton made has good thermotolerance, does not affect sound-absorbing effect because of high-humidity climate and water.
Description
Technical field
The present invention relates to a kind of acoustical cotton, particularly a kind of efficient full range acoustical cotton be made up of melt-blown high polymer fibre layer and eptfe layer.
Background technology
Human auditory system is very responsive, and normal person can discover the sound variation of 1dB, and the difference of 3dB will feel obvious difference.In general we of less than 15 decibels just can think that it belongs to " deathly stillness ".20-40 decibel is approximately lovers' vocies in one's ear.40-60 decibel belongs to us and talks sound normally.More than 60 decibels just belong to noisy scope, 70 decibels we just can think that it is very noisy, and it is neural to start hearing damage, more than 90 decibels will make impaired hearing, and stay in the space of 100-120 decibel, if nothing else, within one minute, the mankind must temporaryly become deaf.There is masking effect in people's ear, when a sound is higher than another sound 10dB, less sound is difficult to because sheltering be heard and understand, and due to masking effect, in the environment of 90-100dB, also can not hear even if closely talk.People's ear has the ability of perception sound frequency, and the sound people that frequency is high have the sensation of " high pitch ", and the sound people that frequency is low have the sensation of " bass ", and the normal auditory frequency range of people's ear is 20-20KHz.The tubule of the similar 2-3cm of people's ear duct, due to frequency resonance, in the scope of 2000-3000Hz, sound is enhanced, and occupies an leading position in the consonant of this frequency in language, be conducive to not hearing language and exchanging, but the aging at first frequency of people's ear is also within the scope of this.It is generally acknowledged, below 500Hz is low frequency, and 500Hz-2000Hz is intermediate frequency, and more than 2000Hz is high frequency.The frequency range of language mainly concentrates on intermediate frequency.Human auditory system susceptibility due to the difference of frequency different, when frequency is lower or higher, susceptibility is deteriorated, onesize sound, and intermediate frequency sounds and to ring than the sound of low frequency and high frequency.
Mention noise, everybody is not strange.Noise is all affecting our work efficiency all the time, sleep, hearing, Music Appreciation and health.Away from noise, will leave melodized sound, what we can do is exactly sound insulation and sound-absorbing.
Acoustical cotton conventional in the market has glass fibre acoustical cotton, rock wool, rubber and plastic acoustical cotton, and sponge (pyramid acoustical cotton, egg is cotton), dacron acoustical cotton, gradient acoustical cotton etc., sound-absorbing effect is imperfect.Be difficult to meet high-fidelity audio equipment and apply the environment space that will obviously reduce in noise all frequency range.Be analyzed as follows:
Glass wool is substantially identical with rock wool key property, and fire-fighting index is A level, for not firing product.So consider that glass wool or rock wool are good selections from fire prevention angle merely.The material of composition glass wool is glass fibre, and glass fibre is a kind of fragile fibre, and this fiber stiffness is large, and this fiber of simple understanding, just as pin, is very easy to thrust skin, so glass fibre cotton is easy to cause pruitus.Certain fragile fibre meeting efflorescence, efflorescence is exactly the fiber making original fiber become more tiny, and these fibers enter in air, if once be sucked by human body, will thrust the tube wall of respiratory tract and alveolar, cause respiratory tract anaphylaxis.Here it is, and restriction glass wool uses the biggest factor, be exactly that it is not too friendly briefly, and rock wool also has radiated wave, also has harm to human body.In sum, glass fibre acoustical cotton is more suitable for outdoor application, because its price is lower.And indoor should be avoided using as far as possible, health is our maximum wealth after all.
Seemingly, they are all expanded materials, and major part is all closed cell foamed material for rubber and plastic cotton and sponge comparing class.Be understood that according to sound-absorbing principle, the sound absorption qualities of this closed-cell materials or limited.So these materials are more suitable for for field of thermal insulation.Rubber and plastic cotton and sponge are inflammable products, and can produce toxic gas in combustion.
Dacron acoustical cotton and gradient acoustical cotton are also like comparing class.Gradient acoustical cotton is also a kind of dacron acoustical cotton, and its special character is its structure, and its structure is Graded Density, and its obvious performance in sound-absorbing field of its this structures shape, it can accomplish full range sound-absorbing.This kind of acoustical cotton is just more suitable for indoor use, and it meets the selection standard of indoor material, and one is environmental protection E1 level, and fire-fighting B1 level, acoustic test data is relatively good.And the limitation of general dacron acoustical cotton is that the frequency range of sound-absorbing is narrower, can only have good absorption effect to the sound of characteristic frequency, the density according to it only has good performance to the frequency range of its correspondence.Gradient acoustical cotton is given birth to for this situation just, it just well remains the advantage of dacron acoustical cotton, to acoustical behavior having been done outstanding lifting, the hardness of gradient acoustical cotton is by soft excessive in hard, gradient acoustical cotton is confined to indoor decoration sound-absorbing and uses, the equal existing defects of above material and deficiency.
Summary of the invention
The object of the invention is to solve above-mentioned deficiency, the efficient full range acoustical cotton that a kind of efficient full range is made up of melt-blown high polymer fibre layer and eptfe layer is provided
Realizing the object of the invention technical scheme is: a kind of full range acoustical cotton, has two-layer or three-decker, and the full range acoustical cotton of double-layer structure is made up of melt-blown high polymer fibre layer and eptfe layer; Three layers of full range acoustical cotton are made up of the two-sided compound eptfe layer of melt-blown high polymer fibre layer, or are made up of the melt-blown high polymer fibre layer of the two-sided compound of eptfe layer.
Above-mentioned full range acoustical cotton, described melt-blown high polymer fibre layer is meltblown polypropylene fibres thin layer or melt-blown pet fiber thin layer.
Above-mentioned full range acoustical cotton, described eptfe layer micro-pore diameter is 0.01 ~ 20 μm.
Above-mentioned full range acoustical cotton, described eptfe layer is grease-proof and waterproof modification eptfe layer.
Preparation method's one of above-mentioned full range acoustical cotton comprises the steps:
A, prepare melt-blown high polymer fibre layer (1), by the polymeric resin through melting at a high speed and under temperature is 310 DEG C ~ 374 DEG C hot-air winding-up effects, the superpolymer drawing-off of melting is become length is 25 ~ 100mm, mean diameter is less than 8 μm ultrafine fiber, and forming melt-blown high polymer fibre layer connecing cooling curing on melt-blown receiving apparatus;
B, prepare eptfe layer (2), polytetrafluoroethyldispersion dispersion resin is mixed in proportion with liquid extrusion aid, is pressed into cylinder blank in advance, by rolling process, cylinder blank is laminated, then extrusion aid, drawn, thermal finalization is sloughed, obtained eptfe layer;
C, by melt-blown high polymer fibre layer (1) and eptfe layer (2) compound, adopt heating or ultrasonic soldering compound, the temperature on two interlayer welding composition surfaces controls at 210 DEG C ~ 230 DEG C, and compound portable cord speed is 0.5m/min.
The another kind of preparation method of above-mentioned full range acoustical cotton comprises the steps:
A, prepare eptfe layer (2), polytetrafluoroethyldispersion dispersion resin is mixed in proportion with liquid extrusion aid, is pressed into cylinder blank in advance, by rolling process, cylinder blank is laminated, then extrusion aid, drawn, thermal finalization is sloughed, obtained eptfe layer;
B, on eptfe layer (2), make full range acoustical cotton by melt-blown for superpolymer, the screw speed of melt-blowing equipment is 8 turns/min, receiving range is 120mm, high polymer molten temperature is 318 DEG C, melt-blowing equipment nozzle temperature is 325 DEG C, air themperature is 305 DEG C, the superpolymer drawing-off of melting is made to become mean diameter to be less than the ultrafine fiber of 8 μm, receiving trap linear velocity is 2m/min, melt-blown go out high polymer fibre layer thickness be less than 6mm, and directly on the melt-blown eptfe layer (2) obtained in step A, cooling and shaping obtains full range acoustical cotton.
The above-mentioned preparation method comprising the full range acoustical cotton of water-repellent modified eptfe layer of draining the oil, comprises the steps:
A, prepare melt-blown high polymer fibre layer (1), by the polymeric resin through melting at a high speed and under temperature is 310 DEG C ~ 374 DEG C hot-air winding-up effects, the superpolymer drawing-off of melting is become length is 25 ~ 100mm, mean diameter is less than 8 μm ultrafine fiber, and forming melt-blown high polymer fibre layer connecing cooling curing on melt-blown receiving apparatus;
B, prepare eptfe layer (2), polytetrafluoroethyldispersion dispersion resin is mixed in proportion with liquid extrusion aid, is pressed into cylinder blank in advance, by rolling process, cylinder blank is laminated, then extrusion aid, drawn, thermal finalization is sloughed, obtained eptfe layer;
C, prepare grease-proof and waterproof modification eptfe layer (3), be successively coated with organic silicon compound liquid and fluorochemical monomer CF4 liquid eptfe layer (2) is upper, then dry;
D, by melt-blown high polymer fibre layer (1) and grease-proof and waterproof modification eptfe layer (3), adopt heating or ultrasonic soldering compound, the temperature on two interlayer welding composition surfaces controls at 210 DEG C ~ 230 DEG C, and compound portable cord speed is 0.5m/min.
The preparation method of above-mentioned full range acoustical cotton, liquid extrusion aid is aviation kerosene.
The preparation method of above-mentioned full range acoustical cotton, sloughs extrusion aid method for evaporation.
Melt-blown superpolymer ultrafine fiber (PP polypropylene or PET polyester) random melt-blown distribution is bonded together and forms thin layer micropore clearance material, white appearance, smooth, neither too hard, nor too soft, material fiber fineness is 1 ~ 10 μm, there is larger specific surface area, higher porosity (> 75%), ultrafine fiber stochastic distribution provides more heat bonding chance between fiber.By this melt-blown superpolymer ultrafine fiber and expanded PTFE (ePTFE) film (micropore diameter, at 0.01 ~ 20 μm, every square centimeter has several hundred million micro-porous permeable gaps) compound.After melt-blown superpolymer ultrafine fiber layer and expanded PTFE (ePTFE) Film laminated, its structure is: have in material a large amount of, interpenetrate, from table to inner micropore, also namely there is certain gas penetration potential.The sound-absorbing principle of many micropores matter acoustical material is vibrate air when passing in and out from slot, and air molecule and material and self friction, be transformed into heat energy acoustic energy, consumed.Kong Yue is much closeer, sound absorbing power is stronger, define a kind of specific function new material of high performance efficient full range sound-absorbing, when sound wave incident is to this many micropores new material surface, cause the air vibration in micropore, due to viscous resistance and the conduction of heat of frictional resistance and air, quite a few acoustic energy is converted into heat energy, sound equipment acoustic pressure reduces 4 ~ 6dB in all frequency range, full range sound-absorbing effect is fairly obvious, especially centering low frequency noise absorbs better, be applied on high-fidelity audio equipment, noise can be absorbed in whole frequency range, leave dulect music, be used in indoor environment, on automobile or electromechanical equipment, noise is large by degree of absorption, its neighbourhood noise will greatly reduce, to the environment that people one is comfortable.
Liquid extrusion aid selects aviation kerosene, is because oil molecule is less of micron order, occupies certain space, then after evaporation is sloughed, leave one square centimeter of several hundred million micropore during the mixing of liquid extrusion aid in system.
This efficient full range acoustical cotton keeps the outside air pressure equilibriums such as high-fidelity audio equipment, loudspeaker and indoor environment: the stress on reduction internal component is to extend the serviceable life of product, fall the electric short circuit accident that low fogging dew condensation phenomenon causes to occur, improve reliability and extend serviceable life of product.
This efficient full range acoustical cotton is high-tech environmental protection full range acoustical material, white non-toxic free from extraneous odour, non-volatility gas, nuisanceless pollution, not containing carcinogen; Operation, without the pungency of similar glass fibre to skin, can be carried out Punching Technology, not produce dust chip etc.
This efficient full range acoustical cotton has excellent thermotolerance, can at about 100 degree Long-Time Service.Efficient full range acoustical cotton has good thermotolerance, and fire protecting performance (anti-flammability) material meets automotive trim requirement completely.Improve life and property safety.
This efficient full range acoustical cotton hydrophobicity, without mouldy, bacteria breed, rots and the generation of bad smell, guarantees long-time stability.In wet condition, acoustic absorptivity is constant, and water absorbing capacity is no more than 1% of own wt, and easily does.
This efficient full range acoustical cotton is under the environment of 120 DEG C, and continuous 1000 hours, sound-absorbing was unchanged.
This efficient full range acoustical cotton density is little, easy and simple to handle, and compressible and deformability is applicable to different size or tight quarters, provides greater flexibility to product design.Product quality is soft, and very light in weight, can cut randomly, and is easy to install.Glue spraying, pressure sensitive adhesive tape, ultrasonic soldering, hot sticky subsides or stickup of pushing pin can be used
This efficient full range acoustical cotton has excellent high-frequency insulation performance, and because it absorbs water hardly, therefore insulating property are not by the impact of humidity.
This efficient full range acoustical cotton effectively can be deposited and more completely cut off air and reflect ambient heat, reaches inner comfortable temperature faster, keeps inner temperature, have the heat-insulating property more superior than eider down with less energy.The loss of automotive interior heat can be protected in winter, the inflow of outside heat can be intercepted in summer, reduce the energy consumption of air conditioner for automobile, for new compound substance is introduced in the low-carbon (LC) peace and quiet life of 21 century.
The present invention has positive effect: (1) high-performance composite microporous thin layer new material is provided with better full range sound absorbing power; (2) environment-protecting asepsis free from extraneous odour, non-volatility gas, pollution-free, not containing carcinogen; (3) operation is without the pungency of similar glass fibre to skin, can carry out Punching Technology, not produce dust chip etc.; (4) adopt melt-blown high polymer fibre layer and this bi-material of eptfe layer, the acoustical cotton made has good thermotolerance, does not affect sound-absorbing effect because of high-humidity climate and water.
Accompanying drawing explanation
In order to make content of the present invention more easily be clearly understood, below according to specific embodiment also by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the full range acoustical cotton structural representation of double-layer structure;
Fig. 2 is the full range acoustical cotton structural representation of the three-decker of the two-sided compound eptfe layer of melt-blown high polymer fibre layer;
Fig. 3 is the full range acoustical cotton structural representation of the three-decker of the melt-blown high polymer fibre layer of the two-sided compound of eptfe layer;
Fig. 4 is that loudspeaker self the full range sound decibel number of diameter 30mm is according to figure (without acoustical cotton layer);
Fig. 5 is that the full range sound decibel number that detects after meltblown polypropylene fibres glues the loudspeaker of note diameter 30mm is according to figure;
Fig. 6 be meltblown polypropylene fibres compound eptfe membrane efficient full range acoustical cotton paster glue be posted on the loudspeaker of diameter 30mm after the full range sound decibel number that detects according to figure.
Embodiment
(embodiment 1)
A, domestic melting index is selected to be 12g/min, molecular weight is the polypropylene chip of 200,000, the screw speed of melt-blowing equipment is 8 turns/min, and receiving range is 120mm, and melt temperature is 318 DEG C, nozzle temperature is 325 DEG C, air themperature is 305 DEG C, and form the ultrafine fiber of mean diameter < 8 μm, receiving trap linear velocity is 2m/min, fiber layer thickness controls as < 6mm, and cooling curing becomes meltblown polypropylene fibres thin layer 1 on the reception device;
B, prepare eptfe layer 2, polytetrafluoroethyldispersion dispersion resin is mixed by 1: 2 volume ratio with aviation kerosene, is pressed into cylinder blank in advance, by rolling process, cylinder blank is laminated, then extrusion aid, drawn, thermal finalization are sloughed in evaporation, obtained eptfe layer 2;
C, by one deck meltblown polypropylene fibres thin layer 1 and one deck eptfe layer 2 ultrasonic soldering compound, the temperature on two interlayer welding composition surfaces controls at 210 DEG C, and compound portable cord speed is 0.5m/min.
(embodiment 2)
A, domestic melting index is selected to be 12g/min, molecular weight is the polypropylene chip of 200,000, the screw speed of melt-blowing equipment is 8 turns/min, and receiving range is 120mm, and melt temperature is 318 DEG C, nozzle temperature is 325 DEG C, air themperature is 305 DEG C, and form the ultrafine fiber of mean diameter < 8 μm, receiving trap linear velocity is 2m/min, fiber layer thickness controls as < 6mm, and cooling curing becomes meltblown polypropylene fibres thin layer 1 on the reception device;
B, prepare eptfe layer 2, polytetrafluoroethyldispersion dispersion resin is mixed by 1: 2 volume ratio with aviation kerosene, is pressed into cylinder blank in advance, by rolling process, cylinder blank is laminated, then aviation kerosene, drawn, thermal finalization are sloughed in evaporation, obtained eptfe layer 2;
C, by one deck meltblown polypropylene fibres thin layer 1 and two-layer eptfe layer 2 high-temperature heating compound, the temperature on two interlayer welding composition surfaces controls at 230 DEG C, and compound portable cord speed is 0.5m/min.
(embodiment 3)
A, prepare eptfe layer 2, polytetrafluoroethyldispersion dispersion resin is mixed by 1: 2 volume ratio with aviation kerosene, is pressed into cylinder blank in advance, by rolling process, cylinder blank is laminated, then aviation kerosene, drawn, thermal finalization are sloughed in evaporation, obtained eptfe layer;
B, on eptfe layer 2, full range acoustical cotton is made by melt-blown for superpolymer, domestic molecular weight is selected to be 300,000 poliester chips, the screw speed of melt-blowing equipment is 8 turns/min, receiving range is 120mm, high polymer molten temperature is 318 DEG C, melt-blowing equipment nozzle temperature is 325 DEG C, air themperature is 305 DEG C, the superpolymer drawing-off of melting is made to become mean diameter to be less than the ultrafine fiber of 8 μm, receiving trap linear velocity is 2m/min, melt-blown go out high polymer fibre layer thickness be less than 6mm, and it is directly melt-blown on step A eptfe layer 2, cooling and shaping obtains full range acoustical cotton.
(embodiment 4)
A, domestic melting index is selected to be 12g/min, molecular weight is the polypropylene chip of 200,000, the screw speed of melt-blowing equipment is 8 turns/min, and receiving range is 120mm, and melt temperature is 318 DEG C, nozzle temperature is 325 DEG C, air themperature is 305 DEG C, and form the ultrafine fiber of mean diameter < 8 μm, receiving trap linear velocity is 2m/min, fiber layer thickness controls as < 6mm, and cooling curing becomes meltblown polypropylene fibres thin layer 1 on the reception device.
B, prepare eptfe layer 2, polytetrafluoroethyldispersion dispersion resin is mixed by 1: 2 volume ratio with aviation kerosene, is pressed into cylinder blank in advance, by rolling process, cylinder blank is laminated, then aviation kerosene, drawn, thermal finalization are sloughed in evaporation, obtained eptfe layer 2;
C, prepare grease-proof and waterproof modification eptfe layer 3, successively coating silicone fluid and fluorochemical monomer CF4 liquid, then 40 DEG C of oven dry on eptfe layer 2;
D, by two-layer meltblown polypropylene fibres thin layer 1 and one deck eptfe layer 2 high-temperature heating compound, the temperature on two interlayer welding composition surfaces controls at 210 DEG C, and compound portable cord speed is 0.5m/min.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a full range acoustical cotton, is characterized in that: have two-layer or three-decker, and the full range acoustical cotton of double-layer structure is made up of melt-blown high polymer fibre layer (1) and eptfe layer (2); Three layers of full range acoustical cotton are made up of the two-sided compound eptfe layer (2) of melt-blown high polymer fibre layer (1), or are made up of the melt-blown high polymer fibre layer (1) of eptfe layer (2) two-sided compound; Described melt-blown high polymer fibre layer (1) is meltblown polypropylene fibres thin layer or melt-blown pet fiber thin layer.
2. full range acoustical cotton according to claim 1, is characterized in that: described eptfe layer (2) micro-pore diameter is 0.01 ~ 20 μm.
3. full range acoustical cotton according to claim 1, is characterized in that: described eptfe layer (2) is grease-proof and waterproof modification eptfe layer (3).
4. the preparation method of full range acoustical cotton as claimed in claim 1, is characterized in that: comprise the steps:
A, prepare melt-blown high polymer fibre layer (1), by the polymeric resin through melting at a high speed and under temperature is 310 DEG C ~ 374 DEG C hot-air winding-up effects, the superpolymer drawing-off of melting is become length is 25 ~ 100mm, mean diameter is less than 8 μm ultrafine fiber, and forming melt-blown high polymer fibre layer connecing cooling curing on melt-blown receiving apparatus;
B, prepare eptfe layer (2), polytetrafluoroethyldispersion dispersion resin is mixed in proportion with liquid extrusion aid, be pressed into cylinder blank in advance, by rolling process, cylinder blank is laminated, then extrusion aid, drawn, thermal finalization is sloughed, obtained eptfe layer (2);
C, by melt-blown high polymer fibre layer (1) and eptfe layer (2) compound, adopt heating or ultrasonic soldering compound, the temperature on two interlayer welding composition surfaces controls at 210 DEG C ~ 230 DEG C, and compound portable cord speed is 0.5m/min.
5. the preparation method of full range acoustical cotton as claimed in claim 1, is characterized in that: comprise the steps:
A, prepare eptfe layer (2), polytetrafluoroethyldispersion dispersion resin is mixed in proportion with liquid extrusion aid, be pressed into cylinder blank in advance, by rolling process, cylinder blank is laminated, then extrusion aid, drawn, thermal finalization is sloughed, obtained eptfe layer (2);
B, on eptfe layer (2), make full range acoustical cotton by melt-blown for superpolymer, the screw speed of melt-blowing equipment is 8 turns/min, receiving range is 120mm, high polymer molten temperature is 318 DEG C, melt-blowing equipment nozzle temperature is 325 DEG C, air themperature is 305 DEG C, the superpolymer drawing-off of melting is made to become mean diameter to be less than the ultrafine fiber of 8 μm, receiving trap linear velocity is 2m/min, melt-blown go out high polymer fibre layer thickness be less than 6mm, and directly on the melt-blown eptfe layer (2) obtained in step A, cooling and shaping obtains full range acoustical cotton.
6. the preparation method of full range acoustical cotton as claimed in claim 3, is characterized in that: comprise the steps:
A, prepare melt-blown high polymer fibre layer (1), by the polymeric resin through melting at a high speed and under temperature is 310 DEG C ~ 374 DEG C hot-air winding-up effects, the superpolymer drawing-off of melting is become length is 25 ~ 100mm, mean diameter is less than 8 μm ultrafine fiber, and forming melt-blown high polymer fibre layer connecing cooling curing on melt-blown receiving apparatus;
B, prepare eptfe layer (2), polytetrafluoroethyldispersion dispersion resin is mixed in proportion with liquid extrusion aid, be pressed into cylinder blank in advance, by rolling process, cylinder blank is laminated, then extrusion aid, drawn, thermal finalization is sloughed, obtained eptfe layer (2);
C, prepare grease-proof and waterproof modification eptfe layer (3), be successively coated with organic silicon compound liquid and fluorochemical monomer CF4 liquid the eptfe layer (2) that step B is obtained is upper, then dry;
D, by melt-blown high polymer fibre layer (1) and grease-proof and waterproof modification eptfe layer (3), adopt heating or ultrasonic soldering compound, the temperature on two interlayer welding composition surfaces controls at 210 DEG C ~ 230 DEG C, and compound portable cord speed is 0.5m/min.
7. the preparation method of full range acoustical cotton according to claim 4 or 5 or 6, is characterized in that: liquid extrusion aid is aviation kerosene.
8. the preparation method of full range acoustical cotton according to claim 4 or 5 or 6, is characterized in that: slough extrusion aid method for evaporation.
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| CN103342029A (en) * | 2013-07-23 | 2013-10-09 | 常州市泛亚微透科技有限公司 | Expanded polytetrafluoroethylene composite fibre cotton with high acoustical absorption coefficient |
| CN103498428B (en) * | 2013-09-25 | 2016-08-17 | 江苏泛亚微透科技股份有限公司 | Traffic sound barrier high acoustic absorption combined material and preparation method thereof |
| CN103660474A (en) * | 2013-12-03 | 2014-03-26 | 常州市泛亚微透科技有限公司 | Nonwoven fabric composite sound-absorbing lamination fabric for automobile internal decoration and manufacturing method thereof |
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| CN103974166A (en) * | 2014-05-08 | 2014-08-06 | 常州市泛亚汽车饰件有限公司 | High fidelity audio device for automobile |
| CN103974154A (en) * | 2014-05-08 | 2014-08-06 | 常州市泛亚汽车饰件有限公司 | Full-frequency noise reduction protecting jacket for automobile loudspeaker |
| CN104175622A (en) * | 2014-08-14 | 2014-12-03 | 上海华特汽车配件有限公司 | Porous noise reduction product and preparation method and use thereof |
| CN105835500B (en) * | 2016-03-21 | 2017-10-13 | 林云权 | A kind of double-deck adhesive-bonded fabric acoustical cotton and its preparation technology |
| CN107512030B (en) * | 2017-08-01 | 2020-02-04 | 广德天运新技术股份有限公司 | Preparation method of double-component sound-absorbing cotton with super-strong sound-absorbing effect |
| CN111296949A (en) * | 2020-04-14 | 2020-06-19 | 浙江莎美实业股份有限公司 | Reusable daily mask |
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