CN103177719A - Full-frequency sound absorbing cotton - Google Patents
Full-frequency sound absorbing cotton Download PDFInfo
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- CN103177719A CN103177719A CN2011104354321A CN201110435432A CN103177719A CN 103177719 A CN103177719 A CN 103177719A CN 2011104354321 A CN2011104354321 A CN 2011104354321A CN 201110435432 A CN201110435432 A CN 201110435432A CN 103177719 A CN103177719 A CN 103177719A
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Abstract
The invention relates to full-frequency sound absorbing cotton which is provided with a double-layer structure or three-layer structure. The full-frequency sound absorbing cotton of the double-layer structure is composed of a melt-blow high polymer fiber layer and a varicosity polytetrafluoroethylene layer. The full-frequency sound absorbing cotton of the three-layer structure is composed of a melt-blow high polymer fiber layer with double faces compounded with the varicosity polytetrafluoroethylene layer or the varicosity polytetrafluoroethylene layer with double faces compounded with the melt-blow high polymer fiber layer. A high-performance composite micropore thin layer new material has better full-frequency sound absorbing capacity; is environment-friendly, non-toxic and free of peculiar smell, volatile gas, pollution or carcinogenic substances; and is free of stimulation caused by operating similar glass fiber on the skin, can be machined in punching mode, and does not generate dust or scraps and the like. The sound absorbing cotton made of the two materials of the melt-blow high polymer fiber layer and the varicosity polytetrafluoroethylene layer has good thermal resistance, and a sound absorbing effect cannot be affected by 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 by melting and spraying high polymer fibre layer and eptfe layer and forming.
Background technology
Human auditory system is very responsive, and the normal person can discover the sound variation of 1dB, and the difference of 3dB will be felt obvious difference.In general we below 15 decibels just can think that it belongs to " deathly stillness ".The 20-40 decibel is approximately lovers' vocies in one's ear.The 40-60 decibel belongs to us and talks normally sound.Just belonged to the noise scope more than 60 decibels, 70 decibels we just can think that it is very noisy, and the beginning hearing damage is neural, will make impaired hearing more than 90 decibels, and stay in the space of 100-120 decibel, if nothing else, the mankind must temporaryly become deaf in one minute.There is masking effect in people's ear, and during higher than another sound 10dB, less sound is difficult to be heard and understand because sheltering when a sound, due to masking effect, in the environment of 90-100dB, even closely speech can not heard yet.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, sound is enhanced in the scope of 2000-3000Hz, occupies an leading position in the consonant of this frequency in language, be conducive to not hear language and exchange, but people's ear at first aging frequency also in this scope.It is generally acknowledged, 500Hz is following is low frequency, and 500Hz-2000Hz is intermediate frequency, and 2000Hz is above is high frequency.The frequency range of language mainly concentrates on intermediate frequency.Human auditory system susceptibility is because frequency is different different, susceptibility variation when frequency is lower or higher, and onesize sound, intermediate frequency sound that the sound than low frequency and high frequency rings.
Mention noise, everybody is not strange.Noise is all affecting our work efficiency all the time, sleep, hearing, Music Appreciation and health.Stay melodized sound away from noise, what we can do is exactly sound insulation and sound-absorbing.
Acoustical cotton commonly used has the glass fibre acoustical cotton in the market, rock wool, and the rubber and plastic acoustical cotton, sponge (pyramid acoustical cotton, egg is cotton), the dacron acoustical cotton, gradient acoustical cotton etc., sound-absorbing effect is imperfect.Be difficult to satisfy high-fidelity audio equipment and the environment space that will obviously reduce in noise full range scope is used.Be analyzed as follows:
Glass wool and rock wool key property are basic identical, and the fire-fighting index is the A level, for not firing product.So consider that from the fire prevention angle glass wool or rock wool are good selections merely.The material that forms glass wool is glass fibre, and glass fibre is a kind of fragile fibre, and this fiber stiffness is large, simply understands this fiber just as pin, is very easy to thrust skin, so glass fibre cotton is easy to cause pruitus.Certainly fragile fibre meeting efflorescence, efflorescence is exactly to make original fiber become more tiny fiber, and in a single day these fibers enter in air, if sucked by human body, will thrust the tube wall of respiratory tract and alveolar, cause respiratory tract anaphylaxis.Here it is, and the restriction glass wool uses the biggest factor, be exactly that it is not too friendly briefly, and rock wool also has radiated wave, and human body is also had harm.In sum, the glass fibre acoustical cotton is more suitable for outdoor application, because its price is lower.And indoor should as far as possible avoiding used, and health is the wealth of our maximum after all.
Cotton and the sponge comparing class of rubber and plastic seemingly, they are all expanded materials, and major part is all closed cell foamed material.Be understood that the sound absorption qualities of this closed-cell materials or limited according to the sound-absorbing principle.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 process.
Dacron acoustical cotton and gradient acoustical cotton are also like comparing class.The gradient acoustical cotton is also a kind of dacron acoustical cotton, and its special character is its structure, and its structure is gradient density, its this structures shape it in the obvious performance in sound-absorbing field, it can accomplish the full range sound-absorbing.This class acoustical cotton just is more suitable for indoor use, and it meets the selection standard of indoor material, and the one, environmental protection E1 level, fire-fighting B1 level, acoustical testing data are relatively good.And the limitation of general dacron acoustical cotton is that the frequency range of sound-absorbing is narrower, and good absorption effect can only be arranged the sound of characteristic frequency, only its corresponding frequency range is had preferably performance according to its density.The gradient acoustical cotton is given birth to for this situation just, it has just well kept the advantage of dacron acoustical cotton, to having done outstanding lifting on acoustical behavior, the hardness of gradient acoustical cotton is by soft excessive in hard, the gradient acoustical cotton is confined to the indoor decoration sound-absorbing and uses, and above material all exists defective and deficiency.
Summary of the invention
The objective of the invention is to solve above-mentioned deficiency, provide a kind of efficient full range by the efficient full range acoustical cotton that melts and sprays high polymer fibre layer and eptfe layer and form
Realize that the object of the invention technical scheme is: a kind of full range acoustical cotton, have two-layer or three-decker, the full range acoustical cotton of double-layer structure forms by melting and spraying high polymer fibre layer and eptfe layer; Three layers of full range acoustical cotton form by melting and spraying the two-sided compound eptfe layer of high polymer fibre layer, or are comprised of the two-sided compound high polymer fibre layer that melts and sprays of eptfe layer.
Above-mentioned full range acoustical cotton, described to melt and spray the high polymer fibre layer be the fusion-jetting polypropylene fibre thin layer or melt and spray the pet fiber thin layer.
Above-mentioned full range acoustical cotton, described eptfe layer micro-pore diameter are 0.01～20 μ m.
Above-mentioned full range acoustical cotton, described eptfe layer are grease-proof and waterproof modification eptfe layer.
The preparation method of above-mentioned full range acoustical cotton is a kind of to be comprised the steps:
A, preparation melt and spray high polymer fibre layer (1), to be under 310 ℃～374 ℃ hot-air winding-up effects in high speed and temperature through the polymeric resin of melting, make the superpolymer drawing-off of melting become length be 25～100mm, mean diameter less than the ultrafine fiber of 8 μ m, and melt and spray on receiving apparatus cooling curing and form and melt and spray the high polymer fibre layer connecing;
B, preparation eptfe layer (2), polytetrafluoroethyldispersion dispersion resin is mixed in proportion with the liquid extrusion aid, be pressed in advance the cylinder blank, by rolling process, the cylinder blank is laminated, then slough extrusion aid, drawn, thermal finalization, make eptfe layer;
C, will to melt and spray high polymer fibre layer (1) and eptfe layer (2) compound, adopts heating or ultrasonic soldering compound, and the temperature on two interlayer welding composition surfaces is controlled at 210 ℃～230 ℃, 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, preparation eptfe layer (2), polytetrafluoroethyldispersion dispersion resin is mixed in proportion with the liquid extrusion aid, be pressed in advance the cylinder blank, by rolling process, the cylinder blank is laminated, then slough extrusion aid, drawn, thermal finalization, make eptfe layer;
B, superpolymer is melted and sprayed on eptfe layer (2) make the full range acoustical cotton, the screw speed of melt-blowing equipment is 8 to turn/min, receiving range is 120mm, the high polymer molten temperature is 318 ℃, the melt-blowing equipment nozzle temperature is 325 ℃, air themperature is 305 ℃, make the superpolymer drawing-off of melting become mean diameter less than the ultrafine fiber of 8 μ m, the receiving trap linear velocity is 2m/min, the high polymer fibre layer thickness that melts and sprays out is less than 6mm, and directly melt and spray on the eptfe layer (2) that the A step makes, cooling and shaping makes the full range acoustical cotton.
The above-mentioned preparation method who comprises the full range acoustical cotton of the water-repellent modified eptfe layer of draining the oil comprises the steps:
A, preparation melt and spray high polymer fibre layer (1), to be under 310 ℃～374 ℃ hot-air winding-up effects in high speed and temperature through the polymeric resin of melting, make the superpolymer drawing-off of melting become length be 25～100mm, mean diameter less than the ultrafine fiber of 8 μ m, and melt and spray on receiving apparatus cooling curing and form and melt and spray the high polymer fibre layer connecing;
B, preparation eptfe layer (2), polytetrafluoroethyldispersion dispersion resin is mixed in proportion with the liquid extrusion aid, be pressed in advance the cylinder blank, by rolling process, the cylinder blank is laminated, then slough extrusion aid, drawn, thermal finalization, make eptfe layer;
C, preparation grease-proof and waterproof modification eptfe layer (3) are in upper organic silicon compound liquid and the fluorochemical monomer CF4 liquid of successively being coated with of eptfe layer (2), then oven dry;
D, will melt and spray 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 is controlled at 210 ℃～230 ℃, and compound portable cord speed is 0.5m/min.
The preparation method of above-mentioned full range acoustical cotton, the liquid extrusion aid is aviation kerosene.
The preparation method of above-mentioned full range acoustical cotton sloughs the extrusion aid method and is evaporation.
Melting and spraying superpolymer ultrafine fiber (PP polypropylene or PET polyester) melts and sprays at random to distribute to be bonded together and forms thin layer micropore clearance material, outward appearance is pure white, smooth, neither too hard, nor too soft, the material fiber fineness is 1～10 μ m, has larger specific surface area, higher porosity (＞75%), ultrafine fiber stochastic distribution provide more heat bonding chance between fiber.This is melted and sprayed superpolymer ultrafine fiber and expanded PTFE (ePTFE) film (micropore diameter is at 0.01～20 μ m, and several hundred million micro-porous permeable gaps are arranged on every square centimeter) compound.After melting and spraying superpolymer ultrafine fiber layer and expanded PTFE (ePTFE) Film laminated, its structure is: have in material a large amount of, interpenetrate, from the table to inner micropore, also namely have 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 are transformed into heat energy to acoustic energy, have consumed.much closeer Kong Yue is, sound absorbing power is stronger, formed a kind of specific function new material of high performance efficient full range sound-absorbing, when sound wave incides this many micropores new material surface, cause the air vibration in micropore, viscous resistance and conduction of heat due to frictional resistance and air, quite a few acoustic energy is converted into heat energy, the sound equipment acoustic pressure has reduced by 4～6dB in the full range scope, the full range sound-absorbing effect is fairly obvious, especially the centering low frequency noise absorbs better, it is applied on high-fidelity audio equipment, can absorb noise in whole frequency range, stay dulect music, use is in indoor environment, on automobile or electromechanical equipment, to be absorbed degree large for noise, its neighbourhood noise will greatly reduce, give comfortable environment of people.
The liquid extrusion aid is selected aviation kerosene, is that the liquid extrusion aid occupies certain space when mixing in system, then after evaporation is sloughed, has stayed one square centimeter of several hundred million micropore because oil molecule is less of micron order.
This efficient full range acoustical cotton keeps the inside and outside air pressure balances such as high-fidelity audio equipment, loudspeaker and indoor environment: reduce stress on internal component to extend the serviceable life of product, fall the electric short circuit accident that low fogging condensation phenomenon causes and 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 nontoxic free from extraneous odour, and non-volatility gas, nuisanceless pollution does not contain carcinogen; Operation can be carried out Punching Technology without the pungency of similar glass fibre to skin, does not produce dust chip etc.
This efficient full range acoustical cotton has good thermotolerance, can be 100 long-term uses the in degree left and right.Efficient full range acoustical cotton has good thermotolerance, and fire protecting performance (anti-flammability) material meets the automotive trim requirement fully.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.Under wet environment, 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 ℃, 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.The product quality is soft, and very light in weight can cut randomly, and is easy to install.Can use glue spraying, pressure sensitive adhesive tape, ultrasonic soldering, hot sticky subsides or the stickup of pushing pin
This efficient full range acoustical cotton has good high-frequency insulation performance, because it absorbs water hardly, therefore insulating property are not subjected to the impact of humidity.
This efficient full range acoustical cotton can effectively be deposited more isolated air and reflect external heat, reaches faster inner comfortable temperature, and the temperature with still less energy reserving inside has the heat-insulating property more superior than eider down.Can protect the loss of automotive interior heat in winter, can intercept the inflow of outside heat in summer, reduce the energy consumption of air conditioner for automobile, for new compound substance is introduced in the quiet life of the low-carbon (LC) of 21 century.
The present invention has positive effect: the composite microporous thin layer new material of (1) high-performance has had better full range sound absorbing power; (2) environment-protecting asepsis free from extraneous odour, non-volatility gas, pollution-free, do not contain carcinogen; (3) operation without the pungency of similar glass fibre to skin, can be carried out Punching Technology, does not produce dust chip etc.; (4) adopt and to melt and spray high polymer fibre layer and this bi-material of eptfe layer, the acoustical cotton that makes has preferably thermotolerance, does not affect sound-absorbing effect because of high-humidity climate and water.
Description of drawings
Content of the present invention is easier to be expressly understood in order to make, and the below is according to specific embodiment and by reference to the accompanying drawings, and 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 that melts and sprays the three-decker of the two-sided compound eptfe layer of high polymer fibre layer;
Fig. 3 is the two-sided compound full range acoustical cotton structural representation that melts and sprays the three-decker of high polymer fibre layer of eptfe layer;
Fig. 4 be diameter 30mm loudspeaker self full range sound decibel number according to figure (without the acoustical cotton layer);
Fig. 5 is that the full range sound decibel number that detects after the loudspeaker of the sticking note diameter 30mm of fusion-jetting polypropylene fiber is according to figure;
Fig. 6 is that the sticking full range sound decibel number that detects after the loudspeaker of diameter 30mm of being posted on of the efficient full range acoustical cotton of fusion-jetting polypropylene fiber composite eptfe membrane paster is according to figure.
Embodiment
(embodiment 1)
A, to select domestic melting index be 12g/min, molecular weight is 200,000 polypropylene chip, the screw speed of melt-blowing equipment is 8 to turn/min, and receiving range is 120mm, and melt temperature is 318 ℃, nozzle temperature is 325 ℃, air themperature is 305 ℃, forms the ultrafine fiber of mean diameter＜8 μ m, and the receiving trap linear velocity is 2m/min, fiber layer thickness is controlled to be＜6mm, and cooling curing becomes fusion-jetting polypropylene fibre thin layer 1 on receiving trap;
B, preparation eptfe layer 2, polytetrafluoroethyldispersion dispersion resin is mixed by 1: 2 volume ratio with aviation kerosene, be pressed in advance the cylinder blank, by rolling process, the cylinder blank is laminated, then extrusion aid, drawn, thermal finalization are sloughed in evaporation, make eptfe layer 2;
C, one deck fusion-jetting polypropylene fibre thin layer 1 and the 2 use ultrasonic soldering of one deck eptfe layer are compound, the temperature on two interlayer welding composition surfaces is controlled at 210 ℃, and compound portable cord speed is 0.5m/min.
(embodiment 2)
A, to select domestic melting index be 12g/min, molecular weight is 200,000 polypropylene chip, the screw speed of melt-blowing equipment is 8 to turn/min, and receiving range is 120mm, and melt temperature is 318 ℃, nozzle temperature is 325 ℃, air themperature is 305 ℃, forms the ultrafine fiber of mean diameter＜8 μ m, and the receiving trap linear velocity is 2m/min, fiber layer thickness is controlled to be＜6mm, and cooling curing becomes fusion-jetting polypropylene fibre thin layer 1 on receiving trap;
B, preparation eptfe layer 2, polytetrafluoroethyldispersion dispersion resin is mixed by 1: 2 volume ratio with aviation kerosene, be pressed in advance the cylinder blank, by rolling process, the cylinder blank is laminated, then aviation kerosene, drawn, thermal finalization are sloughed in evaporation, make eptfe layer 2;
C, one deck fusion-jetting polypropylene fibre thin layer 1 and two-layer eptfe layer 2 use high-temperature heatings are compound, the temperature on two interlayer welding composition surfaces is controlled at 230 ℃, and compound portable cord speed is 0.5m/min.
(embodiment 3)
A, preparation eptfe layer 2, polytetrafluoroethyldispersion dispersion resin is mixed by 1: 2 volume ratio with aviation kerosene, be pressed in advance the cylinder blank, by rolling process, the cylinder blank is laminated, then aviation kerosene, drawn, thermal finalization are sloughed in evaporation, make eptfe layer;
B, superpolymer is melted and sprayed make the full range acoustical cotton on eptfe layer 2, selecting domestic molecular weight is 300,000 poliester chips, the screw speed of melt-blowing equipment is 8 to turn/min, receiving range is 120mm, the high polymer molten temperature is 318 ℃, the melt-blowing equipment nozzle temperature is 325 ℃, air themperature is 305 ℃, make the superpolymer drawing-off of melting become mean diameter less than the ultrafine fiber of 8 μ m, the receiving trap linear velocity is 2m/min, the high polymer fibre layer thickness that melts and sprays out is less than 6mm, and directly melt and spray on A step eptfe layer 2, cooling and shaping makes the full range acoustical cotton.
(embodiment 4)
A, to select domestic melting index be 12g/min, molecular weight is 200,000 polypropylene chip, the screw speed of melt-blowing equipment is 8 to turn/min, and receiving range is 120mm, and melt temperature is 318 ℃, nozzle temperature is 325 ℃, air themperature is 305 ℃, forms the ultrafine fiber of mean diameter＜8 μ m, and the receiving trap linear velocity is 2m/min, fiber layer thickness is controlled to be＜6mm, and cooling curing becomes fusion-jetting polypropylene fibre thin layer 1 on receiving trap.
B, preparation eptfe layer 2, polytetrafluoroethyldispersion dispersion resin is mixed by 1: 2 volume ratio with aviation kerosene, be pressed in advance the cylinder blank, by rolling process, the cylinder blank is laminated, then aviation kerosene, drawn, thermal finalization are sloughed in evaporation, make eptfe layer 2;
C, preparation grease-proof and waterproof modification eptfe layer 3, successively silicon-coating fluid body and fluorochemical monomer CF4 liquid, then 40 ℃ of oven dry on eptfe layer 2;
D, two-layer fusion-jetting polypropylene fibre thin layer 1 and one deck eptfe layer 2 use high-temperature heatings are compound, the temperature on two interlayer welding composition surfaces is controlled at 210 ℃, and compound portable cord speed is 0.5m/min.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above 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 modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. full range acoustical cotton is characterized in that: have two-layer or three-decker, the full range acoustical cotton of double-layer structure is by melting and spraying high polymer fibre layer (1) and eptfe layer (2) forms; Three layers of full range acoustical cotton form by melting and spraying the two-sided compound eptfe layer of high polymer fibre layer (1) (2), or are comprised of the two-sided compound high polymer fibre layer (1) that melts and sprays of eptfe layer (2).
2. full range acoustical cotton according to claim 1 is characterized in that: describedly melt and spray high polymer fibre layer (1) for the fusion-jetting polypropylene fibre thin layer or melt and spray the pet fiber thin layer.
3. full range acoustical cotton according to claim 1, it is characterized in that: described eptfe layer (2) micro-pore diameter is 0.01～20 μ m.
4. full range acoustical cotton according to claim 1, it is characterized in that: described eptfe layer (2) is grease-proof and waterproof modification eptfe layer (3).
5. the preparation method of full range acoustical cotton as claimed in claim 1, is characterized in that: comprise the steps:
A, preparation melt and spray high polymer fibre layer (1), to be under 310 ℃～374 ℃ hot-air winding-up effects in high speed and temperature through the polymeric resin of melting, make the superpolymer drawing-off of melting become length be 25～100mm, mean diameter less than the ultrafine fiber of 8 μ m, and melt and spray on receiving apparatus cooling curing and form and melt and spray the high polymer fibre layer connecing;
B, preparation eptfe layer (2), polytetrafluoroethyldispersion dispersion resin is mixed in proportion with the liquid extrusion aid, be pressed in advance the cylinder blank, by rolling process, the cylinder blank is laminated, then slough extrusion aid, drawn, thermal finalization, make eptfe layer (2);
C, will to melt and spray high polymer fibre layer (1) and eptfe layer (2) compound, adopts heating or ultrasonic soldering compound, and the temperature on two interlayer welding composition surfaces is controlled at 210 ℃～230 ℃, and compound portable cord speed is 0.5m/min.
6. the preparation method of full range acoustical cotton as claimed in claim 1, is characterized in that: comprise the steps:
A, preparation eptfe layer (2), polytetrafluoroethyldispersion dispersion resin is mixed in proportion with the liquid extrusion aid, be pressed in advance the cylinder blank, by rolling process, the cylinder blank is laminated, then slough extrusion aid, drawn, thermal finalization, make eptfe layer (2);
B, superpolymer is melted and sprayed on eptfe layer (2) make the full range acoustical cotton, the screw speed of melt-blowing equipment is 8 to turn/min, receiving range is 120mm, the high polymer molten temperature is 318 ℃, the melt-blowing equipment nozzle temperature is 325 ℃, air themperature is 305 ℃, make the superpolymer drawing-off of melting become mean diameter less than the ultrafine fiber of 8 μ m, the receiving trap linear velocity is 2m/min, the high polymer fibre layer thickness that melts and sprays out is less than 6mm, and directly melt and spray on the eptfe layer (2) that the A step makes, cooling and shaping makes the full range acoustical cotton.
7. the preparation method of full range acoustical cotton as claimed in claim 4, is characterized in that: comprise the steps:
A, preparation melt and spray high polymer fibre layer (1), to be under 310 ℃～374 ℃ hot-air winding-up effects in high speed and temperature through the polymeric resin of melting, make the superpolymer drawing-off of melting become length be 25～100mm, mean diameter less than the ultrafine fiber of 8 μ m, and melt and spray on receiving apparatus cooling curing and form and melt and spray the high polymer fibre layer connecing;
B, preparation eptfe layer (2), polytetrafluoroethyldispersion dispersion resin is mixed in proportion with the liquid extrusion aid, be pressed in advance the cylinder blank, by rolling process, the cylinder blank is laminated, then slough extrusion aid, drawn, thermal finalization, make eptfe layer (2);
C, preparation grease-proof and waterproof modification eptfe layer (3) are in upper organic silicon compound liquid and the fluorochemical monomer CF4 liquid of successively being coated with of eptfe layer (2) that the B step makes, then oven dry;
D, will melt and spray 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 is controlled at 210 ℃～230 ℃, and compound portable cord speed is 0.5m/min.
8. the preparation method of according to claim 5 or 6 or 7 described full range acoustical cottons, it is characterized in that: the liquid extrusion aid is aviation kerosene.
9. the preparation method of according to claim 5 or 6 or 7 described full range acoustical cottons, is characterized in that: slough the extrusion aid method and be 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 |
| CN103498428A (en) * | 2013-09-25 | 2014-01-08 | 常州市泛亚微透科技有限公司 | High-sound-absorbing combined material used for traffic sound barrier and manufacturing method of the high-sound-absorbing combined material |
| CN103660477A (en) * | 2013-12-03 | 2014-03-26 | 常州市泛亚微透科技有限公司 | Textile fabric composite sound-absorbing lamination fabric for automobile internal decoration and manufacturing 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 |
| CN103921485A (en) * | 2013-12-03 | 2014-07-16 | 常州市泛亚微透科技有限公司 | Strong sound absorption member for traffics and its preparation method and application |
| 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 |
| 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 |
| 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 |
| CN105835500A (en) * | 2016-03-21 | 2016-08-10 | 林云权 | Double-layer nonwoven fabric sound-absorbing cotton and preparation process thereof |
| CN107512030A (en) * | 2017-08-01 | 2017-12-26 | 湖北天运消音防振新材料有限公司 | A kind of preparation method for the two-component acoustical cotton for possessing superpower 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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Address after: 213165, No. 28-8, Sakamoto Road, Sakamoto village, Lijia Town, Wujin District, Jiangsu, Changzhou Patentee after: JIANGSU PAN ASIAN MICROVENT TECHNOLOGY CO., LTD. Address before: 213165, No. 28-8, Sakamoto Road, Sakamoto village, Lijia Town, Wujin District, Jiangsu, Changzhou Patentee before: Pan Asian Mirovent Tech (Changzhou) Co., Ltd. |