EP3959073A1 - Composite stratifié aiguilleté absorbant - Google Patents

Composite stratifié aiguilleté absorbant

Info

Publication number
EP3959073A1
EP3959073A1 EP20721494.1A EP20721494A EP3959073A1 EP 3959073 A1 EP3959073 A1 EP 3959073A1 EP 20721494 A EP20721494 A EP 20721494A EP 3959073 A1 EP3959073 A1 EP 3959073A1
Authority
EP
European Patent Office
Prior art keywords
needled
foam
fleece
absorptive
layer composite
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP20721494.1A
Other languages
German (de)
English (en)
Inventor
Volkmar Schulze
Ray SINGH
Volker Kursch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Adler Pelzer Holding GmbH
Original Assignee
Adler Pelzer Holding GmbH
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
Application filed by Adler Pelzer Holding GmbH filed Critical Adler Pelzer Holding GmbH
Publication of EP3959073A1 publication Critical patent/EP3959073A1/fr
Pending legal-status Critical Current

Links

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
    • B32B5/22Layered 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
    • B32B5/245Layered 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 being a foam 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
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/0076Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised in that the layers are not bonded on the totality of their surfaces
    • 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
    • B32B5/06Layered 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 characterised by a fibrous or filamentary layer mechanically connected, e.g. by needling to another layer, e.g. of fibres, of paper
    • 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
    • B32B5/18Layered 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 features of a layer of foamed material
    • 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; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04Interconnection of layers
    • B32B7/08Interconnection of layers by mechanical means
    • B32B7/09Interconnection of layers by mechanical means by stitching, needling or sewing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08Insulating elements, e.g. for sound insulation
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; 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 for damping, noise or other acoustic waves in general
    • 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
    • B32B2250/022 layers
    • 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
    • B32B2250/033 layers
    • 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
    • B32B2250/40Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • 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 or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02Synthetic macromolecular fibres
    • B32B2262/0253Polyolefin 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 or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02Synthetic macromolecular fibres
    • B32B2262/0261Polyamide 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 or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02Synthetic macromolecular fibres
    • B32B2262/0276Polyester fibres
    • B32B2262/0284Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
    • 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 or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/06Vegetal fibres
    • B32B2262/062Cellulose fibres, e.g. cotton
    • 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 or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/14Mixture of at least two fibres made of different materials
    • 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
    • B32B2266/00Composition of foam
    • B32B2266/02Organic
    • B32B2266/0214Materials belonging to B32B27/00
    • B32B2266/0278Polyurethane
    • 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
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/50Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56Damping, energy absorption
    • 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
    • B32B2307/70Other properties
    • B32B2307/718Weight, e.g. weight per square meter
    • 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
    • B32B2307/70Other properties
    • B32B2307/72Density
    • 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
    • B32B2307/70Other properties
    • B32B2307/732Dimensional properties
    • 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
    • B32B2605/003Interior finishings
    • 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
    • B32B2605/08Cars
    • 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
    • D04H1/40Non-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
    • D04H1/42Non-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
    • D04H1/4326Condensation or reaction polymers
    • D04H1/435Polyesters
    • 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
    • D04H1/40Non-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
    • D04H1/44Non-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
    • D04H1/46Non-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

Definitions

  • the invention relates to a layer composite, a sandwich structure, in which a PUR foam layer is needled with at least one fleece.
  • thermoformable acoustic and / or stiffening nonwovens are used, especially in the passenger compartment and luggage compartment. Most of these are loosely pressed thermosetting or thermoplastic bonded textile fiber nonwovens and combinations of foam and / or nonwoven layers with the same or different flow resistances. In addition, so-called flow nonwovens are also used to specifically tune the acoustics.
  • porous, air- and therefore sound-open layers are inserted between the actual outer fabric and the process-related sealing and heavy layers or the insulation in floor coverings.
  • Polyester and mixed fiber fleeces as well as micro-perforated foils are used as porous, air-tight and therefore sound-open layers.
  • the crush resistance is also influenced by the proportion of bicomponent fibers (BiCo) in the nonwovens.
  • BiCo bicomponent fibers
  • TR 200803410 relates to a process for the reuse of relatively coarse waste materials, for example textile waste from the manufacture of automobile parts and products made from them.
  • the method is characterized in that the waste materials are broken into relatively small pieces. This grist is then placed on a base. A top layer of another raw material is then applied to the surface of the waste material and the layers are bonded together.
  • TR 200906997 an analogous process is described in which a further hard layer is also introduced using the effect of heat.
  • US 2018/0251924 A1 proposes a nonwoven composite system in which, on the one hand, two nonwovens and, on the other hand, two nonwovens with an intermediate film. Specially modified fibers are used in the nonwovens.
  • WO 2012/052535 A1 relates to a method for making a composite fleece in a continuous process sequence and a device for carrying out the method.
  • FH ierbei a fiber web is formed from a fiber stream by a carding device, on the surface of which a fleece layer made of synthetic fibers is then placed.
  • the fiber web is guided within a suction zone on a storage belt to a meltblowing device in which the Synthetikfa fibers are placed on the surface of the fiber web by meltblowing.
  • the fibrous web covered with the nonwoven system is then laid in several layers to form the composite nonwoven by a nonwoven laying device.
  • multi-layer needled acoustic and / or stiffening nonwoven with two outer cover nonwovens described with a) a first cover nonwoven consisting of a PE adhesive nonwoven with a weight per unit area of 30 g / m 2 to 200 g / m 2 , preferably from 50 g / m 2 to 150 g / m 2 , and a second cover nonwoven consisting of a PP / PET fleece with a weight per unit area of 50 g / m 2 to 250 g / m 2 , preferably 80 g / m 2 to 200 g / m 2 or
  • both cover nonwovens are each a PP / PET cover nonwoven with a weight per unit area of 200 g / m 2 to 800 g / m 2 , preferably 300 g / m 2 to 600 g / m 2 ,
  • the regrind contains 5% by weight to 50% by weight, preferably 10% by weight to 40% by weight, based on the regrind, dust waste from recycled cotton, PET and two-component fibers.
  • a needled fleece for the setting of textile wheel arch shells in particular is described, which comprises 5 to 14 individual pile layers with a grammage of the fleece in the range from 650 g / m 2 to 1900 g / m 2 , wherein the base fleece made of PP / PET, PP / BiCo / PET, PP / BiCo or PET / BiCo fibers summarizes, described, which is characterized in that
  • the individual layers - according to the acoustic and mechanical requirements in particular for a textile wheel arch liner - each include the same or different materials made of regrind and / or fibers and / or flakes and / or powder in the same or different amounts in layers.
  • the layer composites “fleece / foam” are glued or foamed together.
  • the object of the present invention in relation to the aforementioned prior art is thus to provide an absorptive layer composite, a sandwich structure in which a foam layer is needled with a nonwoven layer arranged thereon and, if appropriate, underneath.
  • the focus here is on the one hand on the significantly improved acoustic effectiveness with approximately the same weight per unit area and on the other hand on the improved acoustic effectiveness and the weight advantage.
  • a fleece / PUR foam layer composite comprising at least one PET fleece with a grammage of 80 g / m 2 to 300 g / m 2 , preferably in the range of 100 g / m 2 to 200 g / m 2 , arranged on the top and / or bottom side of a PUR foam, the PUR foam having a density in the range from 45 g / l to 120 g / l, in particular in the range from 60 g / l to 85 g / l and a thickness in the range from 4 mm to 20 mm, preferably in the range from 8 mm to 15 mm, which is characterized in that the layer composite is needled.
  • acoustically effective components or individual components are known from the prior art in which a foam, a foam layer, is needled with one or more fleece layers / fleece layers (cover fleece).
  • so-called lightweight foams in the density range from 9 g / l to 40 g / l are used instead of the PUR foam in the density range from 45 g / l to 120 g / l.
  • the nonwovens (at least one nonwoven) arranged in particular on the upper and / or lower side of the foam can consist of PET or PA fibers, as well as a fiber mix (mixed fibers); here in particular made of PET / PP and PP / PET / cotton fibers.
  • Fig. 2 is a photo of a needled composite nonwoven / foam / nonwoven is shown.
  • FIG. 3 illustrates in particular the weight and acoustic advantages of the inventive solution when using lightweight foams (LeveCell® and LeveSoft®) compared to a mixed fiber fleece currently in use.
  • FIG. 4 an inventive composite with needled cold foam is shown in comparison with a conventional recycling sandwich fleece; the enormous acoustic advantage of the composite according to the invention can be seen with approximately the same weight per unit area.
  • a further embodiment of the present invention consists in a method for producing the aforementioned layer composite, which is characterized in that the foam is fed or placed onto the first (lower) cover fleece from a roll or as a blank; and then the second (upper) cover fleece runs over it, compacts and needles the entire composite. If necessary, the second (upper) cover fleece is left out.
  • the needling takes place with fork / fork needles, crown / crown needles, fork / crown needles or felting needles.
  • the core of the present invention is thus the provision of a layer composite comprising a needled fleece / foam composite, which improves the acoustic effectiveness of this sandwich structure.
  • the foam cells are pierced during the needling.
  • individual fibers are drawn from the nonwovens that surround it into the foam structure during needling.
  • the foam itself also becomes softer.
  • the advantage of the present invention lies in the fact that the needling of a foam with fleeces arranged on both sides or on one side significantly improves the acoustic effectiveness of the composite and reduces the weight compared to conventional composites or fleeces.
  • the mechanical behavior of the composite needled with fleece is also improved compared to a pure foam.
  • a PUR lightweight foam (LeveSoft®, 24 g / l, thickness 10 mm) was needled on both sides with a 100 g / m 2 and 150 g / m 2 PET fleece.
  • the needling was carried out on a commercially available Fehrer system, the needling density was 20 stitches / cm 2 , the penetration depth 14 mm and the speed 4 m / min.
  • Commercially available felt needles were used as needles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Nonwoven Fabrics (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention a pour objet un composite stratifié, une structure en sandwich, dans lequel une couche de mousse en polyuréthane est aiguilletée avec deux non-tissés.
EP20721494.1A 2019-04-23 2020-04-21 Composite stratifié aiguilleté absorbant Pending EP3959073A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019110494.7A DE102019110494A1 (de) 2019-04-23 2019-04-23 Absorptiver vernadelter Schichtverbund
PCT/EP2020/061093 WO2020216745A1 (fr) 2019-04-23 2020-04-21 Composite stratifié aiguilleté absorbant

Publications (1)

Publication Number Publication Date
EP3959073A1 true EP3959073A1 (fr) 2022-03-02

Family

ID=70465018

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20721494.1A Pending EP3959073A1 (fr) 2019-04-23 2020-04-21 Composite stratifié aiguilleté absorbant

Country Status (6)

Country Link
US (1) US20220203649A1 (fr)
EP (1) EP3959073A1 (fr)
JP (1) JP7548938B2 (fr)
CN (1) CN114007855A (fr)
DE (1) DE102019110494A1 (fr)
WO (1) WO2020216745A1 (fr)

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US11724811B2 (en) * 2019-11-12 2023-08-15 Gulfstream Aerospace Corporation Outflow valve assembly including sound absorption and aircraft including the same
DE102021101921A1 (de) * 2021-01-28 2022-07-28 Adler Pelzer Holding Gmbh Schallisolierung mit mehrschichtiger Faser-Isolation; und Verfahren zu deren Herstellung

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JP2022530048A (ja) 2022-06-27
DE102019110494A1 (de) 2020-10-29
US20220203649A1 (en) 2022-06-30
JP7548938B2 (ja) 2024-09-10
WO2020216745A1 (fr) 2020-10-29

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