CN102658683A - Light flexible noise reduction non-woven composite material, preparation method and application - Google Patents
Light flexible noise reduction non-woven composite material, preparation method and application Download PDFInfo
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- CN102658683A CN102658683A CN2012101256196A CN201210125619A CN102658683A CN 102658683 A CN102658683 A CN 102658683A CN 2012101256196 A CN2012101256196 A CN 2012101256196A CN 201210125619 A CN201210125619 A CN 201210125619A CN 102658683 A CN102658683 A CN 102658683A
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Abstract
The invention belongs to the fields of agriculture, light industry and textile, and particularly discloses a light flexible noise reduction non-woven composite material and a production method. The material can be used as a noise reduction material in the fields of buildings, factories, home improvement and home appliances. The composite material comprises at least one sound insulation material layer and at least two sound absorbing non-woven fabric layers, wherein the sound insulation material layer and the sound absorbing non-woven fabric layers are alternately laminated and are adhered through an adhesive; and the composite material has thickness of 1.4-10 mm. Different from the conventional noise reduction material, the sound insulation material layer and the sound absorbing material layer are manufactured by using a sound absorbing and sound insulation combined principle respectively, and then at least two layers of the two material layers are adhered through the adhesive, so that the material is soft, foldable and bendable, the noise reduction effect is superior, the overall material weight is light, the material can be cut randomly, and excellent application effect and prospect are achieved.
Description
Technical field
The invention belongs to farming, light, spin the field, be a kind of light flexible noise reduction non-woven composite and production method specifically, this material can be done acoustic damping materials in building, factory, house decoration, field of household appliances and use.
Background technology
Along with the development of The modern industry and transportation, noise has become the principal element of harm health of human body and contaminated environment, and it is listed as three primary pollution sources in the present age with air pollution, water pollution.And noise is to receive people complaint and charge maximum pollution sources, become the big problem of world today's property, classified as one of international public hazards.
The harm of noise is many-sided, summarizes to get up can be divided into two aspects.The one, the harm of noise on human body, very noisy can cause the deaf of people and induce multiple disease.As act on people's central nervous system, make people's basic physiological process---corticocerebral excitement with suppress imbalance, cause symptoms such as headache, brain expand, swoon, tinnitus, dreaminess.Noise very easily influences people's mood, labor productivity is reduced, even cause death by accident.The 2nd, noise corrupted equipment building etc.High-power noise can influence the normal operation of instrument and equipment and damage building, as makes instrument readings inaccurate, malfunctioning, and metal material destroys because of acoustic fatigue, and the impact wave energy that intense noise causes makes building damages such as building.
The harm that how to reduce noise has become a present urgent task.Make a general survey of and levy the work that noise control aspect is done both at home and abroad, can see, noise control is mainly started with from two aspects.The one, noise source is administered, be about to the big scrap build of sounding and become the little or equipment of sounding not of sounding, this is measure the most completely.But some sound generation source is uncontrollable.The 2nd, noise reduction on the route of transmission mainly is exploitation, the various acoustic damping materials of development and structure thereof.In recent years, acoustics and material expert constantly release novel acoustic damping materials.In order to satisfy the use under the varying environment condition, improve noise reduction, still need develop the noise reduction new material energetically.
The present invention combines to absorb sound and the principle of noise reduction that insulates against sound and combine, and the material noise reduction is significantly improved.Sound absorption principle: when sound wave incides some porous, ventilative or fibrous material; Thereby sound wave then can get into air and the fiber that material evokes in the material void to be vibrated; Because the heat conductivility of friction and viscosity resistance and fiber, a part of acoustic energy is converted into heat energy and dissipates, thereby has weakened reflected sound; Total noise is reduced, and at this moment people hear is mainly direct sound wave.The method of utilizing this measure to reduce noise is commonly referred to " sound absorption ".By physical property and sound absorption mode, sound absorption can be divided into porous material sound absorption and resonant structure sound absorption two big classes.The former is main with absorbing high-frequency, and the latter is main with absorbing low frequency.
Soundproof theory: noise is understood some acoustic energy and is absorbed by barrier in the air as when running into the very big barrier in border, and a part of acoustic energy is reflected, and remainder then sees through barrier.Desire to make the individual layer acoustic isolation medium that higher oise insulation factor is arranged in low frequency ranges, certainly will will increase greatly the surface density of medium, can make not only heaviness but also waste of actual components like this.If we change structure, change single-layer medium into two-layered medium, there are air layer or sound-absorbing material to separate between layer and the layer, defening effect can be significantly increased, and generally can make oise insulation factor increase 5-l0dB.
Summary of the invention
The object of the invention be to provide a kind of flexibility, lightweight, fire-retardant, acoustic damping materials that noise reduction is good with and preparation method thereof, overcome at present existing relatively poor, the inflammable shortcoming of acoustic damping materials noise reduction.
In order to solve the problems of the technologies described above, the present invention is able to solve through following technical proposals:
A kind of light flexible noise reduction non-woven composite; This composite comprises sound insulating material layer, the two-layer at least sound absorption nonwoven layer of one deck at least; Sound insulating material layer, the alternately stack of sound absorption nonwoven layer; Bonding through adhesive between sound insulating material layer and the sound absorption nonwoven layer, thickness of composite material is 1.4-10mm.
As preferably, the preparation method of described sound insulating material layer is following: selecting lead powder, pitch, fire retardant is raw material, and by mass percentage: the lead powder mass ratio is 50-75%, and asphalt quality is than being 20-40%, and the fire retardant mass ratio is 5-10%; Above-mentioned material, batch mixer is sent into the extruder extrusion modling after fully mixing.Concrete, a kind of composite of this sound insulating material layer for adopting the screw extruder extrusion to produce, thickness in monolayer is 0.6-1.5mm.Its process route is: batching-mixing-extrude-head moulding-roll-in-cooling-rolling.
As preferably; The preparation method of described sound absorption nonwoven layer is following: adopting fire-retardant hollow pet staple fiber is raw material; Production and processing on the non-woven production line of dry-laying pinprick reinforcement; Its process route is: fiber preparation-mechanical carding becomes net-pinprick reinforcement-rolling, and it becomes wire side density is 300-1000g/ m
2, needling density is 1000-2000 thorn/cm
2, depth of needling is 7-10mm, and final finished non-weaving cloth thickness is 0.6-1.5mm, and porosity is 0.6-3.2%.
As preferably, described adhesive is the butadiene-acrylonitrile copolymer emulsion.
As preferably, described noise reduction non-woven composite centre plane density is 2.6-13 kg/m
2
As preferably, the porosity of described sound absorption nonwoven layer is 0.6-3.2%.
The preparation method of above-mentioned light flexible noise reduction non-woven composite is following:
To absorb sound, non-weaving cloth, sound insulating layer are two-layer at least to overlap compoundly, and bonding through the butadiene-acrylonitrile copolymer emulsion between sound absorption non-weaving cloth, the sound insulating layer, the adhesion technique route is: spray glue-curings-rolling, spraying the glue amount is 300g/m
2, curing is pressurised into 1MPa, and be 2 hours hardening time.
This composite is mainly used in building, factory, house decoration, field of household appliances and uses as acoustic damping materials.
The principle of the invention is following: combine sound absorption and the principle of noise reduction that sound insulation combines, the material noise reduction is significantly improved.Sound wave is through some porous, ventilative or fibrous material the time; Thereby sound wave then can get into air and the fiber that material evokes in the material void to be vibrated; Because the heat conductivility of friction and viscosity resistance and fiber, a part of acoustic energy is converted into heat energy and dissipates, thereby has weakened reflected sound; Total noise is reduced, and at this moment people hear is mainly direct sound wave.The method of utilizing this measure to reduce noise is commonly referred to " sound absorption ".By physical property and sound absorption mode, sound absorption can be divided into porous material sound absorption and resonant structure sound absorption two big classes.The former is main with absorbing high-frequency, and the latter is main with absorbing low frequency.When noise in the air as when running into the very big barrier in border, to understand some acoustic energy and absorbed by barrier, a part of acoustic energy is reflected, and remainder then sees through barrier.Desire to make the individual layer acoustic isolation medium that higher oise insulation factor is arranged in low frequency ranges, certainly will will increase greatly the surface density of medium, can make not only heaviness but also waste of actual components like this.If we change structure, change single-layer medium into two-layered medium, there are air layer or sound-absorbing material to separate between layer and the layer, defening effect can be significantly increased, and generally can make oise insulation factor increase 5-l0dB.Absorbent treatment and sound insulating layer are combined, just can reduce noise more effectively.
The present invention has significant technique effect owing to adopted above technical scheme:
The present invention was with acoustic damping materials were different in the past; Adopt sound absorption and sound insulation principle of combining to make sound insulating material layer and sound-absorbing material layer respectively; Then that two kinds of material layers are two-layer at least bonding through adhesive, make the both soft collapsible bending of material, and noise reduction is good; The integral material light weight, can cut out arbitrarily, have good effect and prospect.
Description of drawings
Each frequency range sound-insulation value that Fig. 1 records at Tongji University's acoustical laboratory for the embodiment of the invention 1.
The specific embodiment
The present invention is described in further detail with embodiment below in conjunction with accompanying drawing 1:
Embodiment 1
A kind of preparation method of noise reduction non-woven composite comprises the steps and process conditions:
(1) preparation of sound absorption non-weaving cloth: adopt fire-retardant hollow pet staple fiber (1.4D * 51mm; Zhejiang China is along terylene industrial Co., Ltd) be raw material; Production and processing on the non-woven production line of dry-laying pinprick reinforcement, its process route is: fiber preparation-mechanical carding becomes net-pinprick reinforcement-rolling.It becomes wire side density is 800g/ m
2, needling density is 1500 thorn/cm
2, depth of needling is 9mm, and final finished non-weaving cloth thickness is 0.65mm, and porosity is 2.2%.
(2) preparation of sound insulating layer: select lead powder (Pb >=99.5;-200 Ningbo of Zhejiang cities grand commerce and trade Group Co.,Ltd), modified pitch (Wenzhou state prosperous pitch Co., Ltd), fire retardant materials such as (WSFR-TDCPP, Zhejiang Wansheng Co., Ltd.) are through the screw extruder extrusion molding, by mass percentage; The lead powder mass ratio is 55%; The asphalt quality ratio is 35%, and the fire retardant mass ratio is 10%, and above-mentioned material is sent into the extruder extrusion modling after batch mixer fully mixes; Its process route is: batching-mixing-extrude-head moulding-roll-in-cooling-rolling, final sound insulating layer thickness is 1.2mm.
(3) sound absorption non-weaving cloth and sound insulating layer is compound: the non-weaving cloth-sound insulating layer that will absorb sound-sound absorption non-weaving cloth overlaps compound.The adhesion technique route is: spray glue-curing-rolling, and adhesive is selected the butadiene-acrylonitrile copolymer emulsion for use, and spray glue amount is 250g/m
2, curing is pressurised into 0.5MPa, and be 2.5 hours hardening time.
Three layers of the noise reduction non-woven composite uses of this example preparation are compound, and the intermediate layer is a sound insulating layer, the bonding sound absorption nonwoven layer in sound insulating layer two sides, and general thickness is 2.5mm, surface density is 2.8kg/m
2
Through detecting, the sound insulation weighted value of this routine noise reduction non-woven composite is 20dB.Test is carried out in the Shanghai Tongji University laboratory, and method of testing is: in the room of two vicinities, carry out, sound source is used narrow-band noise.Adopting centre frequency is 100,125,160,200,250,320,400,500,640,800,1000,1250,1600,2000,2500,3200,4000Hz17 1/3 octave band noise signal.Each frequency range sound-insulation value of this routine composite is as shown in Figure 1.As can be seen from the figure this composite has good sound insulation property.Particularly high-frequency noise there is better sound insulation property.
The composite that obtains through this case study on implementation has the good noise reduction in the full audio range, and is more much higher than lightweight acoustic damping materials oise insulation factor in the market, also have fire-retardant, soft, characteristics such as can cut out arbitrarily, have good application prospects.
Embodiment 2
A kind of preparation method of noise reduction non-woven composite comprises the steps and process conditions:
(1) preparation of sound absorption non-weaving cloth: adopt fire-retardant hollow pet staple fiber (1.4D * 51mm; Zhejiang China is along terylene industrial Co., Ltd) be raw material; Production and processing on the non-woven production line of dry-laying pinprick reinforcement, its process route is: fiber preparation-mechanical carding becomes net-pinprick reinforcement-rolling.It becomes wire side density is 1000g/ m
2, needling density is 2000 thorn/cm
2, depth of needling is 10mm, and final finished non-weaving cloth thickness is 0.55mm, and porosity is 1.2%.
(2) preparation of sound insulating layer: select lead powder (Pb >=99.5;-200 Ningbo of Zhejiang cities grand commerce and trade Group Co.,Ltd), modified pitch (Wenzhou state prosperous pitch Co., Ltd), fire retardant materials such as (WSFR-TDCPP, Zhejiang Wansheng Co., Ltd.) are through the screw extruder extrusion molding, by mass percentage; The lead powder mass ratio is 75%; The asphalt quality ratio is 20%, and the fire retardant mass ratio is 5%, and above-mentioned material is sent into the extruder extrusion modling after batch mixer fully mixes; Its process route is: batching-mixing-extrude-head moulding-roll-in-cooling-rolling, final sound insulating layer thickness is 1.3mm.
(3) sound absorption non-weaving cloth and sound insulating layer is compound: the non-weaving cloth-sound insulating layer that will absorb sound-sound absorption non-weaving cloth overlaps compound.The adhesion technique route is: spray glue-curing-rolling, and adhesive is selected the butadiene-acrylonitrile copolymer emulsion for use, and spray glue amount is 300g/m
2, curing is pressurised into 1MPa, and be 2 hours hardening time.
Four layers of the noise reduction non-woven composite uses of this example preparation are compound, are followed successively by sound absorption nonwoven layer-sound insulating material layer-sound-absorbing material layer-sound insulating material layer, and general thickness is 3.8mm, and surface density is 4.8kg/m
2
After testing, the weighting sound-insulation value of this routine noise reduction non-woven composite is 25dB.
Embodiment 3
A kind of preparation method of noise reduction non-woven composite comprises the steps and process conditions:
(1) preparation of sound absorption non-weaving cloth: adopt fire-retardant hollow pet staple fiber (1.4D * 51mm; Zhejiang China is along terylene industrial Co., Ltd) be raw material; Production and processing on the non-woven production line of dry-laying pinprick reinforcement, its process route is: fiber preparation-mechanical carding becomes net-pinprick reinforcement-rolling.It becomes wire side density is 300g/ m
2, needling density is 1000 thorn/cm
2, depth of needling is 7mm, and final finished non-weaving cloth thickness is 1.5mm, and porosity is 1.2%.
(2) preparation of sound insulating layer: select lead powder (Pb >=99.5;-200 Ningbo of Zhejiang cities grand commerce and trade Group Co.,Ltd), modified pitch (Wenzhou state prosperous pitch Co., Ltd), fire retardant materials such as (WSFR-TDCPP, Zhejiang Wansheng Co., Ltd.) are through the screw extruder extrusion molding, by mass percentage; The lead powder mass ratio is 50%; The asphalt quality ratio is 40%, and the fire retardant mass ratio is 10%, and above-mentioned material is sent into the extruder extrusion modling after batch mixer fully mixes; Its process route is: batching-mixing-extrude-head moulding-roll-in-cooling-rolling, final sound insulating layer thickness is 1.1mm.
(3) sound absorption non-weaving cloth and sound insulating layer is compound: the non-weaving cloth-sound insulating layer that will absorb sound-sound absorption non-weaving cloth overlaps compound.The adhesion technique route is: spray glue-curing-rolling, and adhesive is selected the butadiene-acrylonitrile copolymer emulsion for use, and spray glue amount is 200g/m
2, curing is pressurised into 0.8MPa, and be 2.5 hours hardening time.
Five layers of the noise reduction non-woven composite uses of this example preparation are compound, are followed successively by sound absorption nonwoven layer-sound insulating material layer-sound-absorbing material layer-sound insulating material layer-sound absorption nonwoven layer, and general thickness is 6.8mm, and surface density is 6.8kg/m
2
After testing, the weighting sound-insulation value of this routine noise reduction non-woven composite is 24dB.This routine composite is because sound insulating layer lead powder ratio is lower, though thickness reaches 6.8mm, average weighted transmission loss also has only 24dB, but has got well much than other lightweight acoustic damping materials.
In a word, the above is merely preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (8)
1. light flexible noise reduction non-woven composite; It is characterized in that: described composite comprises sound insulating material layer, the two-layer at least sound absorption nonwoven layer of one deck at least; Sound insulating material layer, the alternately stack of sound absorption nonwoven layer; Bonding through adhesive between sound insulating material layer and the sound absorption nonwoven layer, thickness of composite material is 1.4-10mm.
2. a kind of light flexible noise reduction non-woven composite according to claim 1; It is characterized in that: the preparation method of described sound insulating material layer is following: selecting lead powder, pitch, fire retardant is raw material; By mass percentage: the lead powder mass ratio is 50-75%; Asphalt quality is than being 20-40%, and the fire retardant mass ratio is 5-10%; Above-mentioned material, batch mixer is sent into the extruder extrusion modling after fully mixing.
3. a kind of light flexible noise reduction non-woven composite according to claim 1; It is characterized in that: the preparation method of described sound absorption nonwoven layer is following: adopting fire-retardant hollow pet staple fiber is raw material; Production and processing on the non-woven production line of dry-laying pinprick reinforcement; Its process route is: fiber preparation-mechanical carding becomes net-pinprick reinforcement-rolling, and it becomes wire side density is 300-1000g/ m
2, needling density is 1000-2000 thorn/cm
2, depth of needling is 7-10mm, and final finished non-weaving cloth thickness is 0.6-1.5mm, and porosity is 0.6-3.2%.
4. a kind of light flexible noise reduction non-woven composite according to claim 1, it is characterized in that: described adhesive is the butadiene-acrylonitrile copolymer emulsion.
5. a kind of light flexible noise reduction non-woven composite according to claim 1 is characterized in that: described noise reduction non-woven composite centre plane density is 2.6-13 kg/m
2
6. according to claim 1 or 3 described a kind of light flexible noise reduction non-woven composites, it is characterized in that: the porosity of described sound absorption nonwoven layer is 0.6-3.2%.
7. according to the preparation method of the arbitrary described a kind of light flexible noise reduction non-woven composite of claim 1-6, it is characterized in that method is following:
To absorb sound, non-weaving cloth, sound insulating layer are two-layer at least to overlap compoundly, and bonding through the butadiene-acrylonitrile copolymer emulsion between sound absorption non-weaving cloth, the sound insulating layer, the adhesion technique route is: spray glue-curings-rolling, spraying the glue amount is 300g/m
2, curing is pressurised into 1MPa, and be 2 hours hardening time.
8. according to the application of the arbitrary described a kind of light flexible noise reduction non-woven composite of claim 1-6, it is characterized in that: this composite is mainly used in building, factory, house decoration, field of household appliances and uses as acoustic damping materials.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802201A (en) * | 2018-08-29 | 2018-11-13 | 华南理工大学 | The sound proof window tooling tested for automotive sheet part and interior material sound insulation property |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643973A (en) * | 2009-09-04 | 2010-02-10 | 常熟市任阳环宇无纺布厂 | Method for processing non-woven composite material with sound absorption function |
| WO2010082582A1 (en) * | 2009-01-14 | 2010-07-22 | クラレクラフレックス株式会社 | Soundproof panel and soundproof structure |
| CN201659720U (en) * | 2010-02-12 | 2010-12-01 | 张荣初 | Sound absorbing and insulating thermal insulating material product |
| JP2011112860A (en) * | 2009-11-26 | 2011-06-09 | Nippon Tokushu Toryo Co Ltd | Material and method for insulating sound using water-absorbing resin |
| CN102166864A (en) * | 2010-12-31 | 2011-08-31 | 南京航空航天大学 | Heat-insulating and noise-reducing nonwoven composite material for automobile interior trim and preparation method thereof |
-
2012
- 2012-04-26 CN CN2012101256196A patent/CN102658683A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010082582A1 (en) * | 2009-01-14 | 2010-07-22 | クラレクラフレックス株式会社 | Soundproof panel and soundproof structure |
| CN101643973A (en) * | 2009-09-04 | 2010-02-10 | 常熟市任阳环宇无纺布厂 | Method for processing non-woven composite material with sound absorption function |
| JP2011112860A (en) * | 2009-11-26 | 2011-06-09 | Nippon Tokushu Toryo Co Ltd | Material and method for insulating sound using water-absorbing resin |
| CN201659720U (en) * | 2010-02-12 | 2010-12-01 | 张荣初 | Sound absorbing and insulating thermal insulating material product |
| CN102166864A (en) * | 2010-12-31 | 2011-08-31 | 南京航空航天大学 | Heat-insulating and noise-reducing nonwoven composite material for automobile interior trim and preparation method thereof |
Non-Patent Citations (4)
| Title |
|---|
| 罗以喜: "阻燃降噪复合织物的性能研究", 《上海纺织科技》, vol. 33, no. 10, 31 October 2005 (2005-10-31), pages 40 - 41 * |
| 罗以喜: "降噪复合非织造布的研制", 《产业用纺织品》, vol. 21, no. 3, 31 March 2003 (2003-03-31), pages 26 - 29 * |
| 罗以喜等: "非织造降噪复合材料的研究", 《纺织学报》, vol. 25, no. 4, 31 August 2004 (2004-08-31), pages 64 - 66 * |
| 马永喜: "复合针刺非织造材料吸声性能研究", 《东华大学硕士学位论文》, 31 December 2010 (2010-12-31) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802201A (en) * | 2018-08-29 | 2018-11-13 | 华南理工大学 | The sound proof window tooling tested for automotive sheet part and interior material sound insulation property |
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Application publication date: 20120912 |