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WO2006108363A2 - Layered sound absorptive non-woven fabric - Google Patents

Layered sound absorptive non-woven fabric

Info

Publication number
WO2006108363A2
WO2006108363A2 PCT/CZ2006/000017 CZ2006000017W WO2006108363A2 WO 2006108363 A2 WO2006108363 A2 WO 2006108363A2 CZ 2006000017 W CZ2006000017 W CZ 2006000017W WO 2006108363 A2 WO2006108363 A2 WO 2006108363A2
Authority
WO
Grant status
Application
Patent type
Prior art keywords
layer
sound
surface
weight
nanofibres
Prior art date
Application number
PCT/CZ2006/000017
Other languages
French (fr)
Other versions
WO2006108363A3 (en )
WO2006108363B1 (en )
Inventor
Klara Kalinova
Filip Sanetrnik
Oldrich Jirsak
Ladislav Mares
Original Assignee
Elmarco, S.R.O
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered 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
    • B32B5/02Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered 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
    • B32B5/02Layered 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
    • B32B5/022Non-woven fabric
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered 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
    • B32B5/02Layered 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
    • B32B5/08Layered 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 the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered 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
    • B32B5/22Layered 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
    • B32B5/24Layered 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
    • B32B5/26Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers, i.e. products comprising layers having different physical properties and products characterised by the interconnection of layers
    • B32B7/02Layered products characterised by the relation between layers, i.e. products comprising layers having different physical properties and products characterised by the interconnection of layers in respect of physical properties, e.g. hardness
    • DTEXTILES; PAPER
    • D01NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING
    • D01DMECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00Formation of filaments, threads, or the like
    • D01D5/0007Electro-spinning
    • D01D5/0061Electro-spinning characterised by the electro-spinning apparatus
    • D01D5/0076Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid
    • D01D5/0084Coating by electro-spinning, i.e. the electro-spun fibres are not removed from the collecting device but remain integral with it, e.g. coating of prostheses
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING 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
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/728Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING 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
    • D04H13/00Other non-woven fabrics
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16Methods or devices for protecting against, or damping of, acoustic waves, e.g. sound
    • G10K11/162Selection of materials
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16Methods or devices for protecting against, or damping of, acoustic waves, e.g. sound
    • G10K11/162Selection of materials
    • G10K11/168Plural layers of different materials, e.g. sandwiches
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00Layers arrangement
    • B32B2250/20All layers being fibrous or filamentary
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00Composition of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02Synthetic macromolecular fibres
    • B32B2262/0276Polyester fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00Composition of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/12Conjugate fibres, e.g. core/sheath, side-by-side
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/10Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102Insulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2419/00Buildings or parts thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00Vehicles

Abstract

The invention relates to the layered sound absorptive non-woven fabric containing the resonance membrane and at least one another layer (1, 3) of the fibrous material at which the resonance membrane is created by a layer (2) of nanofibres having diameter to 600 nanometers and of surface weight 0,1 to 5 g/m2, at the same time the resonance membrane together with at least one layer (1, 3) of fibrous material is formed by cross laying to the required thickness and surface weight.

Description

Layered sound absorptive non-woven fabric

Technical field

The invention relates to the layered sound absorptive non-woven fabric containing the resonance membrane and at least one another layer of fibrous material.

Background art

The sound absorptive materials are generally used in automotive, aviation, building as well as machinery industry. Their task is to provide for hygiene of surroundings from the point of view of undesired and harmful sound. The proposal itself of a suitable acoustic material is based on frequency area of an undesired sound in the given surroundings.

For absorbing of high frequency sound especially the porous materials are used which are nevertheless unsuitable for absorbing of sound of lower frequencies, this especially due to great material thickness needed. Such used materials include for example the melamine, polyurethane and metal foams or non-woven fabrics of mineral or polymeric fibres. Such materials are not so much suitable for absorbing of sound of lower frequencies, as a great material thickness is needed.

To absorb the low frequencies, especially the structures based on resonance principle are used, when through resonance of some elements the acoustic energy is being transferred into a thermal energy. Nevertheless these structures are absorbing the sounds at a certain low frequency, while for other frequencies its absorbing is very little. The combinations of perforated panel, absorptive material and possibly the air gaps are being used. The characteristics of perforated panel is given by number, diameter and arrangement of gaps.

The general objective is to combine the above mentioned characteristics into one acoustic system, which would be able to absorb both the sound of low as well as the sound of high frequencies. The layered sound absorptive material composed of one or several identical layers of fibres of diameter 0.05 to 5 micrometers obtained through splitting of the PVA foil is known from the JP 10251951 A. These fibres usually show a broad distribution of diameters, but only a very low percentage of these fibres may have the diameter under 1 micrometer. The data on sound absorption at low frequency, which shows a low efficiency of 10 percent also corresponds to this fact.

The layered sound absorptive material composed of several layers of non- woven fabric and several layers of polyester fibres of common diameters produced by means of the melt-blown method, through which the smallest diameter of fibres of about 1 micrometer may be achieved, is known from the JP 2003049351 A. The disadvantage is that this material is designated especially for absorbing of sound of medium frequencies, namely from 1000 to 4000 Hz.

The objective of the invention is to eliminate or at least to minimise the disadvantages of present state of the art and to create a fabric capable at low thickness to absorb both the low as well as the high frequencies of sound.

The principle of invention

The objective of the invention has been achieved by a layered sound absorptive non-woven fabric containing the resonance membrane and at least one another layer of fibrous material, whose principle consists in that the resonance membrane is formed by a layer of nanofibres of diameter to 600 nanometers and of surface weight 0,1 to 5 g/m2, when the resonance membrane together with at least one layer of fibrous material is formed by means of cross laying to the required thickness and surface weight.

At the same time it is advantageous if the layer of nanofibres is created through the electrostatic spinning of polymer solution, as such layer of nanofibres may be applied on the substrate layer of fibrous material during spinning, and joined with this layer consequently. The substrate layer of fibrous material is, according to the claim 3, with advantage created by at least one layer of carded fibrous web consisting of fibres having diameter of 10 to 45 micrometers and of surface weight of 5 to 100g/m2.

To increase the absorption capacity, the layer of nanofibres with a layer of carded fibrous web consisting of fibres having diameter of 10 to 45 micrometers and surface weight of 5 to 100g/m2 is joined on its each side.

The sound absorptive fabric according to the invention absorbs the sound at low frequencies and simultaneously it does not lose the ability of absorption capacity for the higher sound frequencies. Through this ability, which is based on the resonance effect of nanofibre layer damped in elastic manner by the substrate layer created with advantage by the carded fibrous web, it surpasses to date known materials.

Description of the drawing The examples of invention execution are schematically shown on the enclosed drawings, where the Fig. 1 shows the cross section of fabric made of carded fibrous web and a nanofibre layer, the Fig.2 the cross section of fabric made of carded fibrous web, a nanofibre layer and another layer of carded fibrous web, the Fig.3 shows the cross section of fabric made of layer of carded fibrous web, a nanofibre layer and a couple of another layers of carded fibrous web, the Fig. 4 the cross section of fabric made of layer of carded fibrous web, a nanonfibre layer and a trio of layers of carded fibrous web, the Fig. 5 to 11 show the dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the nanofibre layer itself for examples 1 to 7.

Examples of embodiment

The layered sound absorptive non-woven fabric according to Fig. 1 contains the resonance membrane created by a layer 2 of nanofibres of diameter to 600 nanometers produced through electrostatic spinning and of surface weight of 0,1 to 5 g/m2 , and a layer 1. of carded fibrous web, when in the advantageous execution the layer ± of carded fibrous web creates the carrying layer to which during electrostatic spinning the layer 2 of produced nanofibres is deposited, after which both layers join together through a known way at a specified temperature in the hot-air chamber. At the sound absorptive fabric according to Fig. 2 on the fabric according to Fig. 1 there is applied another layer 3 of carded fibrous web, namely from the originally free side of the layer 2 of nanofibres. At the further executions, another layer 3 may be a double one - see the Fig. 3, or a triple one - see the Fig. 4.

To reach the suitable thickness and surface weight of the resulted sound absorptive non-woven fabric, it is advantageous if, after creating the fabric of individual layers according to Fig. 1 to 4, this fabric is formed by means of cross laying to the required thickness and to the required surface weight.

The layer 2 of nanofibres fulfils the function of acoustic resonance membrane vibrating at the low frequency. This character is given by the nano- dimensions of space among the fibres. If a sound wave falls to the acoustic resonance membrane, it brings it to the forced vibration, whose amplitude is maximum in case of resonance, simultaneously the neighbouring layers 1, 3 of carded fibrous web provide for a sufficient damping of the vibrating membrane, at the same time the maximum quantity of the sound energy gathered in the resonator is transferred into a heat. The layer i and/or 3 of the carded fibrous web provides not only for a sufficient damping of vibrating membrane created by a layer 2 of nanofibres, but also absorbs the sounds of higher frequencies. The above mentioned layers 1, 2, 3 are at the same time associated into one resonance system through laying of individual layers ±, 2, 3 one on another and through their joining for example in the hot-air bonding chamber. Through this laying of resonance elements, such a material is being produced which, thanks to the resonance membrane created by the layer 2 of nanofibres, absorbs the sound of low frequencies and simultaneously through the layer X and/or 3 of the carded fibrous web, also the sound of higher frequencies. The fabric according to the invention reaches high values of coefficient of sound absorption capacity for the sounds of low as well as of high frequency, simultaneously it is possible to adjust the material thickness and possibly its surface weight to various requirements.

The particular examples of execution of sound absorptive fabrics according to the invention are described lower.

Example 1

The sound absorptive fabric contains a layer I of carded fibrous web of surface weight of 11 gm"2 produced on the carding machine of the bicomponent fibre of the core-coating type composed of the polyester core and the copolyester coating of the count 5,3 dtex. The layer 2 of nanofibres of surface weight 2 gm"2 is applied onto this layer of fibrous web ± through electrostatic spinning. Onto a pair of layers ±, 2 prepared in this way, from the side of layer 2 of nanofibres there is positioned another layer 3 of the carded fibrous web. The basic fabric is then created according to Fig. 2 and consequently formed by means of cross laying into the sound absorptive fabric of total thickness of 25 mm and surface weight of 630gm~2. The sound absorptive fabric passes through the hot-air chamber at the temperature of circulating air of 140 0C, through which the neighbouring layers are joined mutually. This sound absorptive fabric may contain the layer 2 of nanofibres with surface weight in the range from 2 gm"2 to 0,1 gm"2.

The Fig. 5 shows the dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the layer 2 of nanofibres itself for the sound absorptive fabric according to the example 1 , at the same time the curve N1 expresses this dependence for the layer 2 of nanofibres with surface weight of 2 gm"2, the curve N2 for the layer 2 of nanofibres with surface weight of 1 gm"2, the curve N3 for the layer 2 of nanofibres with surface weight of 0,5 gm"2, the curve N4 for the layer 2 of nanofibres with surface weight of 0,3 gm" 2 and the curve N5 for the layer 2 of nanofibres with surface weight of 0,1 gm"2. The curve P expresses this dependence for a fabric containing only a layer of carded fibrous web, i.e. without using the layer 2 of nanofibres. From the course of individual curves it is possible to select composition of sound absorptive fabric according to actual needs of the issue being solved. Example 2

The sound absorptive fabric shown in the Fig. 1 contains a layer % of carded fibrous web with the surface weight of 11 gm"2 produced on the carding machine of the bicomponent fibres of the core-coating type composed of the polyester core and the copolyester coating of the count 5,3 dtex. The layer 2 of nanofibres with surface weight from 2 to 0,1 gm"2 is applied onto the layer I of fibrous web through electrostatic spinning, in the same manner as in the example

1. Fabric of these two layers i, 2 is after then formed through a cross laying into a sound absorptive fabric with a total thickness of 35 mm and surface weight of

630 gm"2, after which it is heat treated in the same manner as in the example 1 , through which the neighbouring layers are joined.

The dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the layer 2 of nanofibres itself for the fabric according to the example 2 is shown in Fig. 6, at the same time the curve J3 expresses this dependence for layer 2 of nanofibres with surface weight of 0,5 gm"2, the curve J4 for layer 2 of nanofibres with surface weight of 0,3 gm"2 and the curve J5 for the layer 2 of nanofibres with surface weight of 0,1 gm"2.

Example 3

The sound absorptive fabric is produced in the same manner as in example 1 , when the layer 2 of nanofibres with surface weight from 2 to 0,1 gm"2 is applied on the basic layer i of carded fibrous web through the electrostatic spinning. On such a pair of layers i, 2 prepared in this manner, there is positioned another layer 3 of carded fibrous web from the side of the layer 2 of nanofibres. The fabric is then created according to the Fig. 2 and consequently formed through the cross laying into the sound absorptive fabric with the total thickness of 35 mm and surface weight of 630 gm"2, after which it is heat treated in the same manner as in the example 1. The dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the layer 2 of nanofibres for the sound absorptive fabric according to the example 3 is shown in Fig. 7, at the same time the curve N1 expresses this dependence for the layer 2 of nanofibres with surface weight of 2 gm"2, the curve N2 for layer 2 of nanofibres with surface weight of 1 gm"2, the curve N3 for layer 2 of nanofibres with surface weight of 0,5 gm"2, the curve N4 for layer 2 of nanofibres with surface weight of 0,3 gm"2 and the curve N5 for layer 2 of nanofibres with surface weight of 0,1 gm"2. The curve

P expresses this dependence for fabric containing a layer of carded fibrous web only, i.e. without usage of layer 2 of nanofibres.

Example 4

The sound absorptive fabric is produced in the same manner as in example 1, when the layer 2 of nanofibres with surface weight from 2 to 0,1 gm"2 is applied on the basic layer i of carded fibrous web through the electrostatic spinning. On such a pair of layers 1., 2 prepared in this manner, there are positioned another two layers 3 of carded fibrous web from the side of the layer 2 of nanofibres. The fabric is then created according to Fig. 3. The fabric created in this manner is further formed by means of cross laying into the sound absorptive fabric of the total thickness of 35 mm and the surface weight of 630 gm"2. The fabric created in this manner is subject to the heat treatment, the same as in the example 1.

The Fig. 8 shows the dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the layer 2 of nanofibres itself for the sound absorptive fabric according to the example 4, at the same time the curve PP1 expresses this dependence for layer 2 of nanofibres with surface weight of 2 gm"2, the curve PP2 for layer 2 of nanofibres with surface weight of 1 gm"2, the curve PP3 for layer 2 of nanofibres with surface weight of 0,5 gm"2, the curve PP4 for layer 2 of nanofibres with surface weight of 0,3 gm"2 and the curve PP5 for layer 2 of nanofibres with surface weight of 0,1 gm"2. Example 5

The sound absorptive fabric is produced in the same manner as in example 1 , when the layer 2 of nanofibres with surface weight from 2 to 0,1 gm"2 is applied on the basic layer ± of carded fibrous web through the electrostatic spinning. On such a pair of layers I1, 2 prepared in this manner, there are positioned another three layers 3 of carded fibrous web from the side of the layer

2 of nanofibres. The fabric is then created according to the Fig. 4. The fabric created in this manner is further formed by means of cross laying into the sound absorptive fabric of the total thickness of 35 mm and with the surface weight of 630 gm"2. The fabric created in this manner is subject to the heat treatment, the same as in the example 1.

The Fig. 9 shows the dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the layer 2 of nanofibres itself for fabric according to the example 5, at the same time the curve PPP2 expresses this dependence for layer 2 of nanofibres with surface weight of 1 gm" 2, the curve PPP3 for layer 2 of nanofibres with surface weight of 0,5 gm"2 and the curve PPP4 for layer 2 of nanofibres with surface weight of 0,3 gm"2.

Example 6

The sound absorptive fabric is produced in the same manner as in example 1 , when the layer 2 of nanofibres with surface weight from 2 to 0,1 gm"2 is applied on the basic layer 1 of carded fibrous web through the electrostatic spinning. On such a pair of layers I, 2 prepared in this manner, there are positioned another two layers 3 of carded fibrous web from the side of the layer 2 of nanofibres. The fabric is then created according to the Fig. 3 and further formed by means of cross laying into the sound absorptive fabric of the total thickness of 35 mm and with the surface weight of 450 gm"2, after which it is subject to the heat treatment, the same as in the example 1. The Fig. 10 shows the dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the layer 2 itself of nanofibres for the sound absorptive fabric according to the example 6, at the same time the curve PP1 expresses this dependence for layer 2 of nanofibres with surface weight of 2 gm"2, the curve PP2 for layer 2 of nanofibres with surface weight of 1 gm"2, the curve PP3 for layer 2 of nanofibres with surface weight of 0,5 gm"2, the curve PP4 for layer 2 of nanofibres with surface weight of 0,3 gm"2 and the curve PP5 for layer 2 of nanofibres with surface weight of 0,1 gm"2.

Example 7

The sound absorptive fabric is produced in the same manner as in example 1 , when the layer 2 of nanofibres with surface weight from 2 to 0,1 gm"2 is applied on the basic layer ± of carded fibrous web through the electrostatic spinning. On such a pair of layers i, 2 prepared in this manner, there are positioned another three layers 3 of carded fibrous web from the side of the layer 2 of nanofibres. The fabric is then created according to the Fig. 4. The fabric is then created according to the Fig. 4 and further formed by means of cross laying into the sound absorptive fabric of the total thickness of 35 mm and with the surface weight of 450 gm"2, after which it is subject to the heat treatment, in the same manner as in the example 1.

The Fig. 11 shows the dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the layer 2 itself of nanofibres for the sound absorptive fabric according to the example 7, at the same time the curve PPP1 expresses this dependence for the layer 2 of nanofibres with surface weight of 2 gm"2, the curve PPP2 for layer 2 of nanofibres with surface weight of 1 gm"2, the curve PPP3 for layer 2 of nanofibres with surface weight of 0,5 gm"2 and the curve PPP4 for layer 2 of nanofibres with surface weight of 0,3 gm"2.

The above mentioned examples of usage are illustrative only and the invention relates as well to the sound absorptive fabrics containing layers of carded fibrous web of other surface weights and/or composed from other fibres and also to other surface weights, selected as need may be, of nanofibre layers. In no way the invention is limited to the described number of layers of sound absorptive fabric. The shown dependencies of coefficient of sound absorption capacity on sound frequency and the surface weight of the nanofibre layer itself prove a high sound absorption capacity of the fabric according to the invention, especially in the areas of 500 to 6000 Hz, when the coefficient of sound absorption capacity varies from 0,8 to nearly 1.

Industrial applicability

The invention is applicable especially at the producers of sound absorptive lining and components for automotive, aviation, building and machinery industry, and if compared with the present state of the art it considerably improves the hygiene of surroundings in the sphere of an undesired sound.

Claims

1. The layered sound absorptive non-woven fabric containing the resonance membrane and at least one another layer of fibrous material, characterised by that the resonance membrane is created by a layer (2) of nanofibres of diameter to 600 nanometers and of surface weight 0,1 to 5 g/m2, at the same time the resonance membrane, together with another at least one layer (1, 3) of the fibrous material, is formed by means of cross laying to the required thickness and to the surface weight.
2. The layered sound absorptive fabric according to the claim 1, characterised by that the layer (2) of nanofibres is created through electrostatic spinning of polymer solution.
3. The layered sound absorptive fabric according to the claim 2, characterised by that the layer (2) of nanofibres is joined together with at least one layer (1, 3) of carded fibrous web composed of fibres having diameter of 10 to 45 micrometers and of the surface weight 5 to 100g/m2.
4. The layered sound absorptive fabric according to the claim 3, characterised by that the layer (2) of nanofibres is joined on its each side with a layer (1 , 3) of carded fibrous web created by fibres having diameter of 10 to 45 micrometers and of surface weight 5 to 100g/m2.
PCT/CZ2006/000017 2005-04-11 2006-04-10 Layered sound absorptive non-woven fabric WO2006108363B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CZ20050226 2005-04-11
CZPV2005-226 2005-04-11

Applications Claiming Priority (4)

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JP2008505720T JP2008537798A (en) 2005-04-11 2006-04-10 Laminate sound-absorbing non-woven fabric
CA 2601813 CA2601813A1 (en) 2005-04-11 2006-04-10 Layered sound absorptive non-woven fabric
US11911135 US20080173497A1 (en) 2005-04-11 2006-04-10 Layered Sound Absorptive Non-Woven Fabric
EP20060722444 EP1869239A2 (en) 2005-04-11 2006-04-10 Layered sound absorptive non-woven fabric

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1900863A1 (en) 2006-09-15 2008-03-19 Asselin-Thibeau Process and installation for manufacturing a textile comprising inner layers and device relating to the same
WO2008083637A1 (en) * 2007-01-11 2008-07-17 Elmarco, S.R.O. Production method of layered sound absorptive non-woven fabric
DE102008025840A1 (en) 2008-05-29 2009-12-03 Volkswagen Ag Device for sound absorption and sound damping, has resonance absorber fleece, where each layer consists of acoustically transparent knitting fleece
US7815427B2 (en) 2007-11-20 2010-10-19 Clarcor, Inc. Apparatus and method for reducing solvent loss for electro-spinning of fine fibers
US7967588B2 (en) 2007-11-20 2011-06-28 Clarcor Inc. Fine fiber electro-spinning equipment, filter media systems and methods
US8496088B2 (en) 2011-11-09 2013-07-30 Milliken & Company Acoustic composite
WO2014111068A2 (en) 2013-01-18 2014-07-24 Technicka Univerzita V Liberci A sound absorbing means containing at least one cavity resonator
WO2014111067A2 (en) 2013-01-18 2014-07-24 Technicka Univerzita V Liberci A sound absorptive element comprising at least one acoustic resonance membrane formed by a layer of polymeric nanofibers
US9101860B2 (en) 2007-11-20 2015-08-11 Clarcor Inc. Filtration medias, fine fibers under 100 nanometers, and methods
US9186608B2 (en) 2012-09-26 2015-11-17 Milliken & Company Process for forming a high efficiency nanofiber filter
US9731966B2 (en) 2010-02-26 2017-08-15 Clarcor Inc. Non-pleated tubular depth filter having fine fiber filtration media

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101367509B1 (en) * 2005-10-19 2014-02-27 쓰리엠 이노베이티브 프로퍼티즈 컴파니 Multilayer articles having acoustical absorbance properties and methods of making and using the same
JP4635847B2 (en) * 2005-11-30 2011-02-23 トヨタ紡織株式会社 Soundproofing material
JP5390245B2 (en) * 2009-04-17 2014-01-15 帝人株式会社 Sound-absorbing material and sound-absorbing composite material
US8974198B2 (en) 2009-08-10 2015-03-10 Emerson Climate Technologies, Inc. Compressor having counterweight cover
CN101807394A (en) * 2010-04-13 2010-08-18 王艳 Micro-nano-fiber composite layered sound-absorbing material
US9153225B2 (en) 2011-12-16 2015-10-06 Emerson Climate Technologies, Inc. Sound enclosure for enclosing a compressor assembly
JP5876381B2 (en) * 2012-06-21 2016-03-02 名古屋油化株式会社 Sound insulation sound-absorbing material
DE102015209105A1 (en) * 2015-05-19 2016-11-24 Hp Pelzer Holding Gmbh Lightweight acoustic component
CN107614379A (en) * 2015-05-25 2018-01-19 多特瑞尔技术有限公司 A shroud for aircraft
CN106048885A (en) * 2016-06-28 2016-10-26 华南理工大学 Composite sound insulation material comprising cellulose fibers and nanofibers and preparation method of composite sound insulation material
CN106149197A (en) * 2016-06-28 2016-11-23 华南理工大学 Fully-biodegradable composite sound insulation material with hybrid structure and preparation method of material

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040092185A1 (en) * 2002-11-13 2004-05-13 Grafe Timothy H. Wipe material with nanofiber layer
WO2004112937A1 (en) * 2003-06-19 2004-12-29 Donaldson Company, Inc. Cleanable high efficiency filter media structure and applications for use

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6063717A (en) * 1995-10-06 2000-05-16 Nippon Petrochemicals Company Ltd. Hydroentangled nonwoven fabric and method of producing the same
US7694779B2 (en) * 2003-08-25 2010-04-13 Takayasu Co., Ltd. Sound absorbing material
JP2007533873A (en) * 2004-04-19 2007-11-22 ザ プロクター アンド ギャンブル カンパニー Nanofiber containing article for use as a barrier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040092185A1 (en) * 2002-11-13 2004-05-13 Grafe Timothy H. Wipe material with nanofiber layer
WO2004112937A1 (en) * 2003-06-19 2004-12-29 Donaldson Company, Inc. Cleanable high efficiency filter media structure and applications for use

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1900863A1 (en) 2006-09-15 2008-03-19 Asselin-Thibeau Process and installation for manufacturing a textile comprising inner layers and device relating to the same
FR2905956A1 (en) * 2006-09-15 2008-03-21 Asselin Thibeau Soc Par Action Method and plant for manufacturing a textile comprising interlayers, and apparatus relating thereto.
WO2008083637A1 (en) * 2007-01-11 2008-07-17 Elmarco, S.R.O. Production method of layered sound absorptive non-woven fabric
US9101860B2 (en) 2007-11-20 2015-08-11 Clarcor Inc. Filtration medias, fine fibers under 100 nanometers, and methods
US7815427B2 (en) 2007-11-20 2010-10-19 Clarcor, Inc. Apparatus and method for reducing solvent loss for electro-spinning of fine fibers
US7967588B2 (en) 2007-11-20 2011-06-28 Clarcor Inc. Fine fiber electro-spinning equipment, filter media systems and methods
US8366986B2 (en) 2007-11-20 2013-02-05 Clarcor Inc. Fine fiber electro-spinning equipment, filter media systems and methods
DE102008025840A1 (en) 2008-05-29 2009-12-03 Volkswagen Ag Device for sound absorption and sound damping, has resonance absorber fleece, where each layer consists of acoustically transparent knitting fleece
US9731966B2 (en) 2010-02-26 2017-08-15 Clarcor Inc. Non-pleated tubular depth filter having fine fiber filtration media
US8496088B2 (en) 2011-11-09 2013-07-30 Milliken & Company Acoustic composite
US9186608B2 (en) 2012-09-26 2015-11-17 Milliken & Company Process for forming a high efficiency nanofiber filter
WO2014111068A2 (en) 2013-01-18 2014-07-24 Technicka Univerzita V Liberci A sound absorbing means containing at least one cavity resonator
WO2014111067A2 (en) 2013-01-18 2014-07-24 Technicka Univerzita V Liberci A sound absorptive element comprising at least one acoustic resonance membrane formed by a layer of polymeric nanofibers

Also Published As

Publication number Publication date Type
EP1869239A2 (en) 2007-12-26 application
WO2006108363A3 (en) 2006-11-30 application
JP2008537798A (en) 2008-09-25 application
CN101189381A (en) 2008-05-28 application
CA2601813A1 (en) 2006-10-19 application
US20080173497A1 (en) 2008-07-24 application
WO2006108363B1 (en) 2007-01-11 application
KR20080004481A (en) 2008-01-09 application

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