CN103818084A - Sound-absorption needled non-woven composite and preparation method thereof - Google Patents

Sound-absorption needled non-woven composite and preparation method thereof Download PDF

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Publication number
CN103818084A
CN103818084A CN201410076392.XA CN201410076392A CN103818084A CN 103818084 A CN103818084 A CN 103818084A CN 201410076392 A CN201410076392 A CN 201410076392A CN 103818084 A CN103818084 A CN 103818084A
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Prior art keywords
cloth
sound
preparation
woven composite
surface density
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CN201410076392.XA
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CN103818084B (en
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晏雄
陈夕方
杨旭东
张慧萍
陈静
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DANYANG YUSHENG TEXTILE NEW MATERIAL Co Ltd
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DANYANG YUSHENG TEXTILE NEW MATERIAL Co Ltd
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Priority to CN201610387191.0A priority Critical patent/CN106042544A/en
Priority to CN201610386989.3A priority patent/CN106042536A/en
Priority to CN201410076392.XA priority patent/CN103818084B/en
Priority to CN201610386993.XA priority patent/CN106042570A/en
Priority to CN201610387044.3A priority patent/CN106042571A/en
Publication of CN103818084A publication Critical patent/CN103818084A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/02—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4326—Condensation or reaction polymers
    • D04H1/435—Polyesters
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/05—5 or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/20—All layers being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester fibres
    • B32B2262/0284—Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/10—Trains

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Nonwoven Fabrics (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

The invention discloses a preparation method for a sound-absorption needled non-woven composite. The preparation method comprises the following steps: A, opening porous polyester fibers, carding and netting; B, inputting the fiber net into a needling machine for reinforcing by needling, winding, cutting, and preparing fabric, wherein the thickness of the fabric is 4-40 mm and the surface density of the fabric is 40-500 g/m<2>; C, laminating 2-6 layers of the fabric, conducing hot pressing for combining, and then cooling, wherein the temperature for the hot pressing is 100-120 DEG C. The invention further discloses the sound-absorption needled non-woven composite. After hot pressing for combining, the sound-absorption performance of the sound-absorption needled non-woven composite is significantly improved; besides, the sound-absorption needled non-woven composite is light, thin, high in strength and low in production cost.

Description

A kind of sound absorption needling non-woven composite material and preparation method thereof
Technical field
The present invention relates to the preparation method of a kind of sound-absorbing material and this material, especially a kind of needling non-woven sound-absorbing material and preparation method thereof, belongs to sound-absorbing material technical field.
Background technology
Along with scientific and technological progress, people are enjoying high efficiency social activities simultaneously, and also to oneself having brought more social concern, wherein environmental pollution has become one of Main Bottleneck of restriction human social development.Noise pollution is simultaneously along with communications and transportation and the enterprise of Modern High-Speed produce the living standard that has had a strong impact on people.Noise reduction has become an important topic that concerns living standards of the people, coordinated development.Noise reduction mainly contains two developing direction: one is sound insulation technology, and another one is sound absorption technique.Sound insulation technical development defect is to cause secondary or repeated pollution, and often material belongs to high density material, and cost is higher.Sound absorption technique is to utilize the dissipation means of acoustic wave energy, reduces noise in environment, really reaches the object of pollution abatement.Sound-absorbing material is again take porous material as main, and material is take fibrous material as foundation stone.Textile material process technology is exactly to make the articles for use of various mode of appearance of the material of fibre morphology, these articles for use are porous material mostly, and along with the aperture form of different process technologies, material, density with and be distributed with very large difference, these differences cause material sound absorbing capabilities difference.Needled punched nonwoven material is as a kind of technology of fibrous material processing, its material structure form has determined the sqouynd absorption lowering noise superior performance of material, and its processing cost is low, output is high, processing environment pollutes the features such as little, be a kind of comparatively desirable base material that is applied to sqouynd absorption lowering noise aspect, be subject in the last few years extensive concern.
At present, in order to improve the sound absorbing capabilities of material, the general method adopting is the thickness that increases material, but effect not obvious, and be also subject to certain restrictions in the use, as the restriction of the restriction of usage space, material volume and cost.Utilize in addition the resonance sound-absorbing mechanism of microperforated panel that sound-absorbing material is combined with microperforated panel, also can improve the acoustically effective of material, but microperforated panel is more complicated in design and processing, and sound sucting band is narrower.Therefore, sound absorbing capabilities good and frivolous, process easy sound-absorbing material and will have fabulous development prospect in sound-absorbing material field.
The annual Master's thesis of Donghua University 2010 " research of two-piece needle non-woven material sound absorbing capabilities ", author: Ma Yongxi, the selection principle of fibrous raw material has been discussed in the aspect such as machinability and environmental requirement and cost of material of the document requirement to fibrous raw material, fiber from sound absorbing capabilities, inquired into the processing technology (comprising shredding, mixing, combing, lapping, pinprick reinforcement technological parameter) of needled punched nonwoven material, last primary study sound absorbing capabilities and the sound insulation property of compound PET acupuncture sound-absorbing material.Specifically from thickness, surface density and composition fibre fineness respects its impact on sound absorbing capabilities.
Chinese patent literature CN201310041934.5 discloses a kind of low frequency absorption needling non-woven composite material and its preparation method and application, and composite comprises bombax cotton/hollow polyester non-weaving cloth and polyethylene film.Preparation method, comprising: by mass percentage, by the hollow polyester fiber of 60%～90% bombax cotton and 40%～10%, mixes, and shredding, combing, becomes net; Fleece is inputted and in needing machine, is carried out pinprick reinforcement, circle around, cut off, obtain kapok/hollow polyester needle fabric; 0.06mm～0.10mm polyethylene film is entirely placed on to the fibroreticulate one side of above-mentioned needling non-woven, compound, take out, cooling, to obtain final product.This composite can be applicable to the fields such as automotive trim, building, high ferro; This sound-absorbing material is frivolous, and preparation method is simple to operate.Be about 1/3rd of polyster fibre but the intensity of bombax cotton is lower, and the price of bombax cotton is more expensive, this sound-absorbing material is unfavorable for large-scale application.
Summary of the invention
Technical problem to be solved by this invention is to provide the compound rear sound absorbing capabilities of a kind of hot pressing and significantly promotes, and the sound absorption needling non-woven composite material frivolous, intensity is high, production cost is low and the preparation method of this material.
In order to solve the problems of the technologies described above, the invention provides a kind of preparation method of the needling non-woven composite material that absorbs sound, it is characterized in that, comprise following concrete steps:
A. by porous polyester fiber opening, combing, becomes net;
B. fleece is inputted and in needing machine, is carried out pinprick reinforcement, circle around, cut off, make cloth, the thickness of described cloth is 4mm～40mm, surface density is 40～500g/m 2;
C. by 2～6 layers of stacked setting of cloth, carry out hot pressing compound, then cooling, the temperature of hot pressing is 100 ℃～120 ℃.
The one of technique scheme is preferably: above-mentioned porous polyester fiber is that length is the short fiber of 38mm to 100mm, and fineness is 1.56 dtex～16.67dtex, and the hole count of porous polyester fiber is more than or equal to 5.
In order to make the compound better effects if of hot pressing, the one of technique scheme preferably: in above-mentioned steps C, the time of hot pressing is 3～6min, and the pressure of hot pressing is 1.2～1.6MPa.
In order to make composite obtain better sound absorbing capabilities, the one of technique scheme preferably: above-mentioned cloth haves three layers, and the surface density of outer layer cloth is greater than the surface density of intermediate layer cloth.
Technique scheme further preferably: the thickness of cloth is 8mm～15mm, and the surface density of outer layer cloth is 60g/m 2～70g/m 2, the surface density of intermediate layer cloth is 45g/m 2～55g/m 2.
The one of technique scheme is preferably: above-mentioned cloth haves three layers, and the surface density of outer layer cloth is less than the surface density of intermediate layer cloth.
Technique scheme further preferably: the thickness of cloth is 8mm～15mm, and the surface density of outer layer cloth is 60g/m 2～70g/m 2, the surface density of intermediate layer cloth is 45g/m 2～55g/m 2.
In order to solve the problems of the technologies described above, the invention provides a kind of sound absorption needling non-woven composite material of being made by above-mentioned preparation method.
The present invention has positive technique effect:
(1) sound absorption needling non-woven composite material of the present invention is first made cloth by porous polyester fiber by needling process, again by compound multilayer cloth hot pressing stacked together, the surface of adjacent cloth is bonded together under the effect of high temperature, make composite, by combination process, greatly promote the sound absorption of material.The acoustical absorptivity harmony wave frequency of material is relevant, and for porous sound absorption structure, along with the continuous increase of frequency of sound wave, its acoustical absorptivity also constantly increases, and what increase in intermediate frequency sound section is the fastest, and best to the absorbability of high frequency sound wave; For resonance sound-absorbing structure, along with the continuous increase of frequency of sound wave, material first increases afterwards and falls the absorbability of sound wave, best to the absorption of low-frequency sound wave, decreases, and maintain certain level at the acoustical absorptivity of high frequency sound section in intermediate frequency sound section.Sound absorption needling non-woven composite material of the present invention combines resonance sound-absorbing mechanism with porous sound absorption mechanism, the sound absorption frequency range of material is expanded, thereby be more conducive to the comprehensive absorption to noise, makes material obtain good acoustically effective.
(2) sound absorption needling non-woven composite material sound absorbing capabilities excellence of the present invention, is all greater than 0.3 at the acoustic absorptivity of frequency 500～5000Hz scope, and maximum acoustic absorptivity can reach more than 0.9.
(3) sound absorption needling non-woven composite material of the present invention is frivolous and intensity is high, and preparation method is easy and simple to handle, and production cost is lower, has good economic benefit, is suitable for large-scale industrialization and produces.
(4) sound absorption needling non-woven composite material of the present invention can be applicable to multiple fields such as motor-car interior trim, automobile interior trim, building, audio amplifier, high ferro.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is the difference schematic diagram of sample acoustic absorptivity under different frequency of embodiments of the invention 1,2 and comparative example 1,2.
The specific embodiment
Embodiment 1
The preparation method of the sound absorption needling non-woven composite material of the present embodiment, comprises following concrete steps:
A. adopt disclosed existing shredding in the annual Master's thesis of Donghua University 2010 " research of two-piece needle non-woven material sound absorbing capabilities ", combing, lapping technique, by porous polyester fiber opening, combing, becomes net.Porous polyester fiber adopts the seven apertures in the human head polyester staple fiber of the 8.33dtex × 64mm of Yizheng Chemical Fiber Co., Ltd., SINOPEC's production.
B. fleece is inputted and in needing machine, is carried out pinprick reinforcement, circle around, cut off, make two kinds of cloth samples, a kind of thickness of cloth sample is 10mm, surface density is 55g/m 2, the thickness of another kind of cloth sample is 10mm, surface density is 70g/m 2.Needing machine total needle amount: 4800 pins, area 1.2m × 0.3m, punch frequency n is 1200 thorns/min, fibre web output speed V 2for 3.75m/min, feeding speed V 1for 2.5m/min, draw ratio i is 1: 1.5.
C. choosing two surface densities is 55g/m 2cloth sample and a surface density be 70g/m 2cloth sample, three cloth samples are superimposed together, surface density is 70g/m 2cloth sample be positioned in the middle of.Clip with fixture, put into baking oven, be warming up to 110 ℃, take out after in insulation 5min, cooling in air, the pressure of fixture is 1.4MPa.
Be 30mm thereby make thickness, surface density is 180g/m 2sound absorption needling non-woven composite material (sample 3).
Embodiment 2
The preparation method of the sound absorption needling non-woven composite material of the present embodiment, comprises following concrete steps:
A. adopt disclosed existing shredding in the annual Master's thesis of Donghua University 2010 " research of two-piece needle non-woven material sound absorbing capabilities ", combing, lapping technique, by porous polyester fiber opening, combing, becomes net.Porous polyester fiber adopts the seven apertures in the human head polyester staple fiber of the 8.33dtex × 64mm of Yizheng Chemical Fiber Co., Ltd., SINOPEC's production.
B. fleece is inputted and in needing machine, is carried out pinprick reinforcement, circle around, cut off, make two kinds of cloth samples, a kind of thickness of cloth sample is 10mm, surface density is 65g/m 2, the thickness of another kind of cloth sample is 10mm, surface density is 50g/m 2.Needing machine total needle amount: 4800 pins, area 1.2m × 0.3m, punch frequency n is 1200 thorns/min, fibre web output speed V 2for 3.75m/min, feeding speed V 1for 2.5m/min, draw ratio i is 1: 1.5.
C. choosing two surface densities is 65g/m 2cloth sample and a surface density be 50g/m 2cloth sample, three cloth samples are superimposed together, surface density is 50g/m 2cloth sample be positioned in the middle of.Clip with fixture, put into baking oven, be warming up to 110 ℃, take out after in insulation 5min, cooling in air, the pressure of fixture is 1.4MPa.
Be 30mm thereby make thickness, surface density is 180g/m 2sound absorption needling non-woven composite material (sample 4).
Embodiment 3
The preparation method of the sound absorption needling non-woven composite material of the present embodiment, remainder is identical with embodiment 1, difference: porous polyester fiber adopts the seven apertures in the human head polyester staple fiber of the 10.00dtex × 60mm of Yizheng Chemical Fiber Co., Ltd., SINOPEC's production.
Embodiment 4
The preparation method of the sound absorption needling non-woven composite material of the present embodiment, remainder is identical with embodiment 2, difference: porous polyester fiber adopts the ten pore terylene short fibers of the 8.33dtex × 60mm of Yizheng Chemical Fiber Co., Ltd., SINOPEC's production.
Comparative example 1
The preparation method of the ordinary polyester needle fabric of this comparative example, comprises following concrete steps:
A. adopt existing shredding, combing, lapping technique, by ordinary polyester fiber opening, combing, becomes net.Ordinary polyester fiber adopts the ordinary polyester fiber of the 8.33dtex × 64mm of Yizheng Chemical Fiber Co., Ltd., SINOPEC's production.
B. adopt existing needling process, fleece inputted and in needing machine, carried out pinprick reinforcement, circle around, cut off, make ordinary polyester needle fabric (sample 1).The thickness of sample 1 is 30mm, and surface density is 220g/m 2.
Comparative example 2
The preparation method of the ordinary polyester needle fabric of this comparative example, comprises following concrete steps:
A. adopt existing shredding, combing, lapping technique, by ordinary polyester fiber opening, combing, becomes net.Porous polyester fiber adopts the seven apertures in the human head polyester staple fiber of the 8.33dtex × 64mm of Yizheng Chemical Fiber Co., Ltd., SINOPEC's production.
B. adopt existing needling process, fleece inputted and in needing machine, carried out pinprick reinforcement, circle around, cut off, make ordinary polyester needle fabric (sample 2).The thickness of sample 2 is 30mm, and surface density is 1800g/m 2.
Adopt disclosed testing sound absorption performance method in the annual Master's thesis of Donghua University 2010 " research of two-piece needle non-woven material sound absorbing capabilities " to carry out the test of sound absorbing capabilities to sample 1 to 4, result as shown in Figure 1.
As shown in Figure 1, under thickness same case, porous polyester fibre prickling non-weaving cloth is higher than the acoustic absorptivity of ordinary polyester fibre prickling non-weaving cloth, and porous polyester fibre prickling non-weaving cloth has better acoustically effective than ordinary polyester fibre prickling non-weaving cloth.In thickness and surface density all under same case.In the time that frequency is greater than 500Hz, the acoustically effective of sample 3 and sample 4 is obviously better than in scope that sample 1 and sample 2. samples 4 are 500～2000Hz in frequency, and acoustically effective is better than sample 3.Sample 3 is 3000Hz when above in frequency, and acoustically effective is better than sample 4, and the maximum acoustic absorptivity of sample 3 can reach more than 0.9.Compared with the porous polyester fibre prickling non-weaving cloth of sound absorption needling non-woven composite material of the present invention and single structure, there is better acoustically effective.
The present invention is not limited to the various embodiments described above, and above-described embodiment is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all embodiments.And these belong to apparent variation that spirit of the present invention extended out or variation still among protection scope of the present invention.

Claims (8)

1. the absorb sound preparation method of needling non-woven composite material, is characterized in that, comprises following concrete steps:
A. by porous polyester fiber opening, combing, becomes net;
B. fleece is inputted and in needing machine, is carried out pinprick reinforcement, circle around, cut off, make cloth, the thickness of described cloth is 4mm～40mm, surface density is 40g/m 2～500g/m 2;
C. by 2～6 layers of stacked setting of cloth, carry out hot pressing compound, then cooling, the temperature of hot pressing is 100 ℃～120 ℃.
2. a kind of sound absorption needling non-woven composite material according to claim 1 and preparation method thereof, it is characterized in that: described porous polyester fiber is that length is the short fiber of 38mm to 100mm, fineness is 1.56 dtex～16.67dtex, and the hole count of porous polyester fiber is more than or equal to 5.
3. a kind of sound absorption needling non-woven composite material according to claim 1 and preparation method thereof, is characterized in that: in described step C, the time of hot pressing is 3 min～6min, and the pressure of hot pressing is 1.2 MPa～1.6MPa.
4. according to one sound absorption needling non-woven composite material one of claims 1 to 3 Suo Shu and preparation method thereof, it is characterized in that: described cloth haves three layers, the surface density of outer layer cloth is greater than the surface density of intermediate layer cloth.
5. a kind of sound absorption needling non-woven composite material according to claim 4 and preparation method thereof, is characterized in that: the thickness of cloth is 8mm～15mm, and the surface density of outer layer cloth is 60g/m 2～70g/m 2, the surface density of intermediate layer cloth is 45g/m 2～55g/m 2.
6. according to one sound absorption needling non-woven composite material one of claims 1 to 3 Suo Shu and preparation method thereof, it is characterized in that: described cloth haves three layers, the surface density of outer layer cloth is less than the surface density of intermediate layer cloth.
7. a kind of sound absorption needling non-woven composite material according to claim 6 and preparation method thereof, is characterized in that: the thickness of cloth is 8mm～15mm, and the surface density of outer layer cloth is 45g/m 2～55g/m 2, the surface density of intermediate layer cloth is 60g/m 2～70g/m 2.
8. a sound absorption needling non-woven composite material of making according to preparation method claimed in claim 1.
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CN105172275A (en) * 2015-09-25 2015-12-23 丹阳市宇晟纺织新材料有限公司 Full-band sound-absorbing needle-punched non-woven composite structure material and preparation method thereof
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