US3395065A - Non-woven blanket fabric and method - Google Patents

Non-woven blanket fabric and method Download PDF

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Publication number
US3395065A
US3395065A US673315A US67331567A US3395065A US 3395065 A US3395065 A US 3395065A US 673315 A US673315 A US 673315A US 67331567 A US67331567 A US 67331567A US 3395065 A US3395065 A US 3395065A
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US
United States
Prior art keywords
fabric
batt
fibers
stitches
woven
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.)
Expired - Lifetime
Application number
US673315A
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English (en)
Inventor
Sr Charles D Owen
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.)
Beacon Manufacturing Co
Original Assignee
Beacon Manufacturing Co
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 Beacon Manufacturing Co filed Critical Beacon Manufacturing Co
Priority to US673315A priority Critical patent/US3395065A/en
Priority to FI673387A priority patent/FI45464C/fi
Priority to AT1146567A priority patent/AT273031B/de
Priority to GB090/68A priority patent/GB1162781A/en
Priority to ES349436A priority patent/ES349436A1/es
Priority to DE1635702A priority patent/DE1635702C3/de
Priority to SE01414/68A priority patent/SE328084B/xx
Priority to FR138858A priority patent/FR93975E/fr
Priority to NL6801902A priority patent/NL6801902A/xx
Priority to CH195468A priority patent/CH475399A/de
Priority to BE713397D priority patent/BE713397A/xx
Application granted granted Critical
Publication of US3395065A publication Critical patent/US3395065A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • D04H1/52—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 applying or inserting filamentary binding elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/23907—Pile or nap type surface or component
    • Y10T428/2395—Nap type surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24033—Structurally defined web or sheet [e.g., overall dimension, etc.] including stitching and discrete fastener[s], coating or bond

Definitions

  • ABSTRACT OF THE DISCLOSURE An improved non-woven fabric adaptable for use as a blanket and particularly characterized by a single layer stitched and needled construction which eliminates the necessity for a plural layer construction, a supporting layer and a double-yarn lock stitch construction.
  • the fabric includes a needled entangled fiber and stitch construction that provides markedly high strength and avoids raveling of the stitches.
  • This invention concerns a non-woven blanket fabric of markedly high strength that is produced by a greatly simplified and economical method of manufacture.
  • the product and method of this invention constitute an improvement on the blanket fabric disclosed and claimed in the Charles D. Owen Patent No. 3,260,640, issued July 12, 1966, and assigned to Beacon Manufacturing Company, the same assignee as the present application.
  • the blanket fabric covered by that patent employs in its manufacture three batts of non-woven fibers, one of which constitutes a supporting layer that is stitched sufficiently to hold it together and enable satisfactory handling when combining the three batts.
  • the stitched supporting batt is placed in between the other two non-woven batts and the assembly then needled to integrate the three batts to produce the basic blanket fabric which may then be napped to provide a conventional blanket surface on both sides of the product.
  • This three-component blanket fabric has proven of substantial commercial value in the production of blankets on a large scale and offers very worthwhile advantages over prior woven and non-woven blanket fabrics.
  • the purpose of the present invention is to simplify the construction of the blanket fabric and its method of manufacture and the production equipment therefor.
  • the present invention which has accomplished this threefold objective with substantial commercial significance is based on the critical combination of a certain stitching operation that cofunctions with a subsequent needling operation.
  • the special stitching operation is carried out on a single batt of non-woven fibers and is followed by a needling operation that cofunctions with the stitch construction to effect a stabilization and interlocking of the stitches and entanglement of the needled fibers so as to produce a product of exceptionally high strength, uniformity and dimensional stability.
  • the stitches may be in the form of simple chain stitches using a single stitching yarn or single yarn shogged stitches.
  • the strength of the product of the present invention utilizing the chain stitches is approximately one hundred percent greater than the strength of the above prior Owen patent product. Where even greater strength is desired in the blankets or the like produced from the fabric of the present invention, the shogged form of stitch is used, and for maximum strength, the rows of stitches may be placed closer together.
  • the stitch construction of the present invention which requires only a single yarn constitutes a marked improvement over the George H. Hughes Patent No. 3,329,552, issued July 4, 1967, and assigned to the same assignee as the present invention.
  • the product disclosed and claimed in the Hughes patent is made with two sets of yarns for each row of stitching. This produces a locked stitch construction and results in a high strength product but requires approximately twice as much yarn as the product of the present invention.
  • Another practical advantage of the single batt stitched and needled fabric of the present invention is that it avoids any delamination problem and the usual loss of fiber which occurs with delamination, particularly when the fabric is piece dyed.
  • Prior non-woven multiple-layer products have required stock dyeing of the fibers before stitching or needling.
  • the single batt or single layer fabric of this invention avoids this requirement and permits dyeing of the Whole fabric after completion of the stitching and needling operations. This is preferable from an appearance standpoint because it effects uniform color dyeing of the stitching yarn and fibers in the finished product.
  • FIGURE 1 is an enlarged fragmentary exploded perspective view of the obverse side of the improved nonwoven fabric of this invention illustrating the fabric in the three basic stages of its construction;
  • FIGURE 2 is an enlarged fragmentary exploded perspective view of the reverse side of the fabric of FIG- URE 1 illustrating the fabric in the three basic stages of its construction;
  • FIGURE 3 is an enlarged fragmentary perspective view of the obverse side of a stitched batt of non-woven fibers illustrating an alternative stitch construction from that illustrated in FIGURE 1;
  • FIGURE 4 is a view similar to FIGURE 3 and illustrating the reverse side of the stitched batt of FIGURE 3;
  • FIGURE 5 is a somewhat schematic top plan view illustrating one example of suitable apparatus for forming the improved non-woven fabric of this invention.
  • FIGURE '6 is a somewhat schematic side elevational view taken along the line 6-6 of FIGURE 5 and illustrating more particularly the stitching and needling apparatus shown in FIGURE 5.
  • FIGURES 'l and 2 both sides of the improved non-woven fabric constructed according to this invention and generally indicated by the reference numeral 10.
  • FIGURES l and 2 are exploded views illustrating the improved non-woven fabric in the three basic stages of its construction.
  • the improved non-woven fabric 10 comprises a single, unitary, self-sustaining batt 11 of non-woven fibers 12 defining the entire ultimate dimensions of the fabric 10 without other fibrous batts being combined therewith.
  • the non-woven fibers 12 extend generally in the widthwise direction of the fabric 10 to provide strength and stability to the fabric 10 in the widthwise direction.
  • the batt 11 of non-woven fibers 12 includes spacedapart rows of stitches 15 embedded in the batt 11 of nonwoven fibers 12. Each row of stitches 15 is formed from a single continuous stitching yarn 16. The rows of stitches 15 extend in generally the lengthwise direction of the batt 11 throughout the length thereof and pass from one face of the batt to the other face thereof to interlock the fibers 12 and provide strength and stability in the lengthwise direction.
  • T he specific form of stitching 15 utilized may be straight chain stitches, as illustrated in FIGURES 1 and 2, having straight chain loop components on one side of the batt 11 and having straight-line components 21 on the other side of the batt 11 which are parallel to the chain loop components 20.
  • the rows of stitches 15, as shown in FIGURES 3 and 4 may comprise shogged stitches having straight chain loop components 24 on one side of the batt 11 and diagonal or shogged components 25 on the other side of the batt 11 which extend generally diagonally of the batt 11 alternately between rows of the chain loop components 24.
  • the stitched batt is then needled from both sides to form a multiplicity of needled fiber entanglements, generally indicated at 30, which extend from each side of the stitched batt and interlock the fibers of the batt with each other and with the stitches to prevent dislocation and raveling of the stiches and to increase strength and stability of the fabric.
  • This needling operation is performed with a needling machine having barbed needles thereon which act to entangle the fibers 12 of the batt 11 with each other and to entangle these fibers with the stitching yarns 16, so that the normally raveling stitches 15 will be secured and interlocked with the fibers 12 of the batt 11 to prevent raveling.
  • the thus formed stitched and needled fabric construction may be napped to raise the fibers on each side thereof, as broadly indicated at in FIGURES 1 and 2, to a sufficient height and density to cover the stitches 15 and the needled fiber entanglements 30 to provide conventional blanket surfaces thereon.
  • the n n-wo en fibers 12 utilized in the batt 11 may be any suitable synthetic fibers including viscose, acrylic, polyester and polyarnide fibers, or natural fibers including cotton and wool, or other textile fibers, or blends thereof.
  • the stitching yarns 16 utilized to form the rows of stitches -15 may be of various natural or synthetic fibers or blends but continuous filament synthetic yarns, e.g., nylon yarn or polyester yarn, are advantageous to obtain relatively high strength and to prevent breakage in the manufacturing operation and also to give good tensile strength in the finished fabric.
  • FIGURES 5 and 6 suitable apparatus is illustrated for forming the improved non-woven fabric 10 of this invention; however, it is to be understood that this apparatus is illustrative only and that other suitable apparatus might also be used.
  • a conventional opening and feeding device feeds the bulk fibers 12 in staple form to a card, garnett, or other suitable fiber opening device, broadly indicated at 42, to form a batt of fibers 12 extending generally lengthwise of the batt.
  • This batt of fibers 12 from the card 42 is fed to a cross-lapping device 43.
  • the cross-lapping device 43 operates back and forth across a conveyor 46 to deposit the batt of fibers 12 thereon.
  • the cross-lapping device 43 is preferably operated at a sufiicient speed, relative to the speed of the conveyor 46, so that the fibers 12 are deposited onto the conveyor 46 to form a batt 11 of desired thickness having the fibers 12 extending generally widthwise thereof to provide strength and stability to the fabric 10 in the widthwise direction.
  • the cross-lapped batt 1 1 is conveyed from the cross-lapping device 43 to another conveyor 47 which moves the batt 11 into a stitch-forming mechanism, illustrated somewhat schematically at 50, to form lengthwise extending rows of stitches 15 in the batt 11 of fibers 12 to interlock the fibers 12 and to provide lengthwise stability and strength to the fabric 10.
  • the stitch-forming mechanism 50 is of the type utilizing a single beam 51 for supplying a single set of continuous stitching yarn, 16 to the stitch-forming instrumentalities for forming the stitch constructions, described above, utilizing a single set of yarns therein.
  • the stitch-forming mechanism 50 may be of the type having a bank of side-by-side stitching needles which are adapted to pass through the batt and form individual lengthwise extending rows of stitches 15 with the abovedescribed stitch components therein.
  • the stitched batt is led from the stitch-forming mechanism 50 by a. conveyor 53 to a first needling apparatus, broadly indicated at 55.
  • the needling apparatus 55 is of the conventional type utilizing a bank of barbed needles to reciprocate up and down to penetrate the stitched batt -11 from one side thereof and to form the needled fiber entanglements 30 extending from one side thereof.
  • the stitched and partially needled batt 11 is reversed and led through a second needling apparatus, broadly indicated at 57, which is similar to the first needling apparatus 55 and is adapted to needle the material from the other side thereof to form needle penetrations 30 extending from the other side of the material.
  • the stitched and after-needled fabric 10 may be led to any suitable winding or take-up apparatus, generally indicated in the drawings at 59, or it may be led directly to a napping apparatus, generally indicated in FIGURE 5 at 60, for napping the material to provide the napped surfaces 35 thereon.
  • An improved non-woven fabric adaptable for use as a blanket said fabric being particularly characterized by a single layer stitched and needled construction which eliminates the necessity for a plural layer construction, a supporting layer and a double-yarn lock stitch construction, said fabric having an entangled fiber and stitch construction that provides markedly high strength and avoids raveling of the stitches, said fabric comprising:
  • each of said rows of stitches comprises straight chain stitches having straight chain loop components on the other side of said fabric and straight-line components on the other side of said fabric which are parallel to said chain loop components.
  • each of said rows of stitches comprises shogged stitches having straight chain loop components on one side of said fabric and diagonal or shogged components on the other side of said fabric which extend generally diagonally of said fabric alternately between rows of said chain loop components.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Knitting Of Fabric (AREA)
  • Woven Fabrics (AREA)
  • Laminated Bodies (AREA)
US673315A 1965-03-04 1967-10-06 Non-woven blanket fabric and method Expired - Lifetime US3395065A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US673315A US3395065A (en) 1967-10-06 1967-10-06 Non-woven blanket fabric and method
FI673387A FI45464C (fi) 1967-10-06 1967-12-19 Kutomaton kangas, jota käytetään huopana ja joka käsittää yksinkertais en ommellun ja neulatun kerrosrakenteen, sekä kankaan valmistusmenetel mä
AT1146567A AT273031B (de) 1967-10-06 1967-12-19 Vliesstoff zum Herstellen von Decken od.dgl.
GB090/68A GB1162781A (en) 1967-10-06 1968-01-01 Improved Non-Woven Blanket Fabric
ES349436A ES349436A1 (es) 1965-03-04 1968-01-17 Un metodo para la produccion de un genero no tejido perfec-cionado.
DE1635702A DE1635702C3 (de) 1967-10-06 1968-01-24 Verfahren zur Herstellung einer Wirkware
SE01414/68A SE328084B (de) 1967-10-06 1968-02-02
FR138858A FR93975E (fr) 1965-03-04 1968-02-06 Etoffe non tissée et son procédé de fabrication.
NL6801902A NL6801902A (de) 1967-10-06 1968-02-09
CH195468A CH475399A (de) 1967-10-06 1968-02-09 Nichtgewobener Stoff, insbesondere zur Herstellung von Decken
BE713397D BE713397A (de) 1965-03-04 1968-04-08

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US673315A US3395065A (en) 1967-10-06 1967-10-06 Non-woven blanket fabric and method

Publications (1)

Publication Number Publication Date
US3395065A true US3395065A (en) 1968-07-30

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ID=24702148

Family Applications (1)

Application Number Title Priority Date Filing Date
US673315A Expired - Lifetime US3395065A (en) 1965-03-04 1967-10-06 Non-woven blanket fabric and method

Country Status (8)

Country Link
US (1) US3395065A (de)
AT (1) AT273031B (de)
CH (1) CH475399A (de)
DE (1) DE1635702C3 (de)
FI (1) FI45464C (de)
GB (1) GB1162781A (de)
NL (1) NL6801902A (de)
SE (1) SE328084B (de)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3635785A (en) * 1970-01-19 1972-01-18 Beacon Mfg Co Stitched nonwoven fabric utilizing a foam layer and a fibrous layer
US3819469A (en) * 1967-08-07 1974-06-25 Celanese Corp Stitched nonwoven webs
FR2210689A1 (de) * 1972-12-16 1974-07-12 Wildeman Arno
US3913504A (en) * 1973-01-18 1975-10-21 Wirkmaschinenbau Karl Marx Veb Method and device for controlling a uniform fleece supply during tufting
USRE28718E (en) * 1969-06-02 1976-02-24 Veb Nahwirkmaschinenbau Malimo Karl-Marx-Stadt Textile material and manufacture
US4183985A (en) * 1978-01-05 1980-01-15 National Distillers And Chemical Corporation Process of producing a nonwoven needled napped fabric having superior resistance to pilling and shedding
US5294479A (en) * 1992-08-03 1994-03-15 Precision Custom Coatings, Inc. Non-woven interlining
US5971879A (en) * 1997-04-22 1999-10-26 The Gates Corporation Belt reinforcing material and belt constructed therewith
US6155083A (en) * 1997-02-14 2000-12-05 Spinnerei C.B. Goldner Gmbh & Co. Absorbent body for medical use
US20030183550A1 (en) * 2002-03-26 2003-10-02 Diliberto Samuel L. Disaster pack and method for making same
US20070221532A1 (en) * 2003-03-26 2007-09-27 Diliberto Samuel L Disaster pack and method for making same
US20070270071A1 (en) * 2006-05-18 2007-11-22 Greer J Travis Nonwoven fabric towel
US20080296182A1 (en) * 2005-09-16 2008-12-04 Diliberto Samuel L Disaster pack
US20120121885A1 (en) * 2009-07-28 2012-05-17 Saertex France Method for making a core having built-in cross-linking fibers for composite material panels, resulting panel, and device
US20150030804A1 (en) * 2012-02-08 2015-01-29 Quadrant Plastic Composites Ag Sheetlike composite material
CN114224141A (zh) * 2021-12-22 2022-03-25 福建省南安市煌达服饰有限公司 一种保温毯子及其加工工艺

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2484480A1 (fr) * 1980-06-17 1981-12-18 Textima Veb K Procede et dispositif pour consolider mecaniquement des voiles de carde
US4876128A (en) * 1989-03-31 1989-10-24 E. I. Du Pont De Nemours And Company Stitchbonded nonwoven fabric
US5203186A (en) * 1989-09-13 1993-04-20 E. I. Du Pont De Nemours And Company Stitch-stabilized nonwoven fabric
CA2025126C (en) * 1989-09-13 2000-05-02 Dimitri Peter Zafiroglu Stitch-stabilized nonwoven fabric
DE4218234C2 (de) * 1992-06-03 1995-03-30 Malimo Maschinenbau Verfahren und Maschine zur Herstellung fadenverstärkter, verfestigter Faservliese, sowie damit hergestellter Vliesstoff

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2890579A (en) * 1954-04-19 1959-06-16 Tullmaschb Veb Textile material and manufacture
US3112552A (en) * 1960-05-26 1963-12-03 Chatham Mfg Company Needled fabric structure
US3260640A (en) * 1965-03-04 1966-07-12 Beacon Mfg Co Stitched and needled non-woven fabric
US3329552A (en) * 1966-06-16 1967-07-04 Beacon Mfg Co Stitched non-woven fabric

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2890579A (en) * 1954-04-19 1959-06-16 Tullmaschb Veb Textile material and manufacture
US3112552A (en) * 1960-05-26 1963-12-03 Chatham Mfg Company Needled fabric structure
US3260640A (en) * 1965-03-04 1966-07-12 Beacon Mfg Co Stitched and needled non-woven fabric
US3329552A (en) * 1966-06-16 1967-07-04 Beacon Mfg Co Stitched non-woven fabric

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3819469A (en) * 1967-08-07 1974-06-25 Celanese Corp Stitched nonwoven webs
USRE28718E (en) * 1969-06-02 1976-02-24 Veb Nahwirkmaschinenbau Malimo Karl-Marx-Stadt Textile material and manufacture
US3635785A (en) * 1970-01-19 1972-01-18 Beacon Mfg Co Stitched nonwoven fabric utilizing a foam layer and a fibrous layer
FR2210689A1 (de) * 1972-12-16 1974-07-12 Wildeman Arno
US3967472A (en) * 1972-12-16 1976-07-06 Arno Edgar Wildeman Stitch bonded fabrics
US3913504A (en) * 1973-01-18 1975-10-21 Wirkmaschinenbau Karl Marx Veb Method and device for controlling a uniform fleece supply during tufting
US4183985A (en) * 1978-01-05 1980-01-15 National Distillers And Chemical Corporation Process of producing a nonwoven needled napped fabric having superior resistance to pilling and shedding
US5294479A (en) * 1992-08-03 1994-03-15 Precision Custom Coatings, Inc. Non-woven interlining
US6155083A (en) * 1997-02-14 2000-12-05 Spinnerei C.B. Goldner Gmbh & Co. Absorbent body for medical use
US5971879A (en) * 1997-04-22 1999-10-26 The Gates Corporation Belt reinforcing material and belt constructed therewith
US20030183550A1 (en) * 2002-03-26 2003-10-02 Diliberto Samuel L. Disaster pack and method for making same
US20070221532A1 (en) * 2003-03-26 2007-09-27 Diliberto Samuel L Disaster pack and method for making same
US7374045B2 (en) * 2003-03-26 2008-05-20 Diliberto Samuel L Disaster pack and method for making the same
US20080296182A1 (en) * 2005-09-16 2008-12-04 Diliberto Samuel L Disaster pack
US7870960B2 (en) * 2005-09-16 2011-01-18 Diliberto Samuel L Disaster pack
US20070270071A1 (en) * 2006-05-18 2007-11-22 Greer J Travis Nonwoven fabric towel
US20120121885A1 (en) * 2009-07-28 2012-05-17 Saertex France Method for making a core having built-in cross-linking fibers for composite material panels, resulting panel, and device
US8914954B2 (en) * 2009-07-28 2014-12-23 Saertex France Method for making a core having built-in cross-linking fibers for composite material panels, resulting panel, and device
US20150030804A1 (en) * 2012-02-08 2015-01-29 Quadrant Plastic Composites Ag Sheetlike composite material
US12485643B2 (en) 2012-02-08 2025-12-02 Quadrant Plastic Composites Ag Planar composite material
CN114224141A (zh) * 2021-12-22 2022-03-25 福建省南安市煌达服饰有限公司 一种保温毯子及其加工工艺

Also Published As

Publication number Publication date
DE1635702C3 (de) 1975-04-30
AT273031B (de) 1969-07-25
DE1635702A1 (de) 1971-07-15
SE328084B (de) 1970-09-07
FI45464B (de) 1972-02-29
NL6801902A (de) 1969-04-09
FI45464C (fi) 1972-06-12
DE1635702B2 (de) 1974-09-12
GB1162781A (en) 1969-08-27
CH475399A (de) 1969-07-15

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