EP0957696B1 - Schutzgewebe für kettensäge - Google Patents

Schutzgewebe für kettensäge Download PDF

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Publication number
EP0957696B1
EP0957696B1 EP98903794A EP98903794A EP0957696B1 EP 0957696 B1 EP0957696 B1 EP 0957696B1 EP 98903794 A EP98903794 A EP 98903794A EP 98903794 A EP98903794 A EP 98903794A EP 0957696 B1 EP0957696 B1 EP 0957696B1
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EP
European Patent Office
Prior art keywords
fabric
layers
yarns
dtex
aramid
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
EP98903794A
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English (en)
French (fr)
Other versions
EP0957696A1 (de
Inventor
Brian E. Foy
Navin T. Tejani
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and 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
Priority claimed from US09/012,613 external-priority patent/US5876834A/en
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of EP0957696A1 publication Critical patent/EP0957696A1/de
Application granted granted Critical
Publication of EP0957696B1 publication Critical patent/EP0957696B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/24—Resistant to mechanical stress, e.g. pierce-proof
    • A41D31/245—Resistant to mechanical stress, e.g. pierce-proof using layered materials
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear

Definitions

  • This invention relates to sacrificial fabrics for protection from the hazards of the moving chain in chain saws. It has long been known to use special fabrics in garments to provide protection from chain saws.
  • European Patent Application Publication No. 202,183, published November 20, 1986, discloses chain saw protection in a construction of several fabric layers wherein the fabric is loosely woven from aramid yarns and the several layers are loosely stitched together to afford entire breakaway layers to stop the chain.
  • the fabric weave is disclosed to be linen-type (plain).
  • a sacrificial fabric structure for protection from a moving chain saw blade including a plurality of superposed layers of fabric bound together generally around the periphery of the layers and made from yarns having a tenacity of at least 10 grams per dtex and a tensile modulus of at least 150 grams per dtex woven in a 1/x satin weave wherein x is from 3 to 9.
  • a sacrificial fabric structure is, also, provided including a plurality of superposed layers of fabric made from aramid yarns.
  • a preferred embodiment of the structure of this invention utilizes aramid yarns which are at least 1200 dtex made from filaments of poly(p-phenylene terephthalamide).
  • the fabric weave is preferably a 1/3 satin weave (also known as 4 harness satin) and the superposed fabric layers are preferably alternated with layers of felt.
  • the yarns used in fabric structures of this invention are yarns formed from continuous filaments.
  • the preferred yarns are made from aramid.
  • aramid is meant a polyamide wherein at least 85% of the amide (-CO-NH-) linkages are attached directly to two aromatic rings.
  • Para-aramids are the primary polymers in fibers of this invention and poly(p-phenylene terephthalamide)(PPD-T) is the preferred para-aramid.
  • the inventors herein have discovered that a significant and surprising improvement in chainsaw protection can be realized by a combination of the strength of aramid fibers and the use of satin weave to render the fibers stable in fabric form but readily available for stopping the chain.
  • Fig. 1a is a Plain weave pattern wherein each filling yarn (11) passes successively over and under each warp yarn (12), alternating each row and resulting in regular, relatively close-packed fill/warp intersections (13).
  • Fig. 1b is a Twill weave pattern wherein each filling yarn (11) is floated over warp yarns (12) in a staggered series to yield a twill or diagonal rib of fill/warp intersections (13).
  • Fig. 1c is a Satin weave pattern wherein each filling yarn (11) is floated over warp yarns (12) such that the fill/warp intersections (13) are distributed as evenly and widely separated as possible.
  • the satin weave provides a maximum distance between fill/warp intersections while also maximizing the opening between adjacent fill/warp intersections.
  • the most protection will be afforded by a fabric which minimizes the number of fill/warp intersections and maximizes the free length of the fiber which is available. Satin weaves maximize the distance in all directions between fill/warp intersections and provides a smoother (rib-free) surface for more even layering of fabric elements.
  • Satin weave fabrics are used in this invention and satin weaves which are characterized as 1/3 to 1/9 satin weaves, are preferred.
  • the most usually used satin weave is 1/3, also known as 4 harness satin, wherein the fill yarn passes over one and under three warp yarns, in a continuous repeat; and the resulting fill/warp intersections are spaced apart as far as possible. Satin weaves of closer than 1/3 are believed to provide inadequate free fiber with too many fill/warp intersections and low accessibility to the chainsaw. Satin weaves of looser than 1/9 have been found to yield fill yarns which are too easy for the chainsaw to strip from the fabric resulting in inadequate resistance and little slowing of the chain.
  • aramid yarns which are useful in this invention have a linear density of at least 200 dtex.
  • Yarns in the structure of this invention must have strength adequate to resist breaking or pulling out of the fabric before the fabric is taken up by the chain.
  • the yarns should have a linear density of 200 to 3400 dtex, preferably 1000 to 1700 dtex; and the filaments in those yarns should be continuous and have a linear density of greater than 1 dtex and up to 8 dtex, preferably greater than 1.5 dtex and up to 5 dtex.
  • the lower limits are necessary to achieve adequate protection and the upper limits are more a matter of convenience of operation. If yarns or filaments are used having linear densities greater than the upper specified limit, it is difficult to form the fabrics and fabrics so-formed are too stiff for easy handling.
  • the fabric of this invention must have very high strength to cause the fibers to be pulled from the fabric rather than merely broken by the moving chain.
  • the required strength is obtained by using yarns which have a tenacity of at least 10 grams per dtex, preferably at least 15 grams per dtex, and a tensile modulus of 150 to 2000 grams per dtex, preferably 500 to 1500 grams per dtex.
  • a modulus lower than 150 grams per dtex results in excessive fiber stretching in use, and fibers with a modulus higher than 2000 grams per dtex are too stiff for practical use.
  • a tenacity less than 10 grams per dtex results in a fabric which is torn rather than pulled into the chain. As strength is of primary importance in these applications, there is no upper limit for tenacity for these fibers.
  • Fabrics in the structure of this invention can be made from a variety of high strength fiber-forming polymers, including, for example, extended chain polyolefins such as ultra-high molecular weight polyethylene, high strength poly(vinyl alcohol), poly(ethylene naphthalate), poly(p-phenylene benzobisoxazole), and the like, in addition to poly(p-phenylene terephthalamide).
  • extended chain polyolefins such as ultra-high molecular weight polyethylene, high strength poly(vinyl alcohol), poly(ethylene naphthalate), poly(p-phenylene benzobisoxazole), and the like, in addition to poly(p-phenylene terephthalamide).
  • the preferred construction of layers in the protective structure of this invention includes alternating layers of the aforementioned woven fabric and a felt material, generally made from aramid staple fibers using a needling or hydroentangling consolidation process.
  • the felt is from 100 to 140 grams per square meter (3-4 ounces per square yard) and is 1 to 2.5 millimeters (0.04 - 0.1 inch) thick. Specifications for the felt are provided in Specification 6170-4D of the U.S. Department of Agriculture, Forest Service.
  • protective structure 20 includes fabric layer 21 alternating with felt layer 22.
  • cover layer 23 may be provided for decoration, comfort, water proofing, or other desired auxiliary purpose.
  • Cover layer 23 is a light weight inner or outer shell fabric which does not participate in providing chainsaw protection.
  • the fabric structures of this invention are evaluated in accordance with ASTM F 1414 - 92a (Standard Test Method for Measurement of Cut Resistance to Chain Saw in Lower Body (Legs) Protective Clothing). Test results are reported as the Threshold Stopping Speed (TSS).
  • ASTM F 1414 - 92a Standard Test Method for Measurement of Cut Resistance to Chain Saw in Lower Body (Legs) Protective Clothing. Test results are reported as the Threshold Stopping Speed (TSS).
  • the fabric structures which are evaluated are the alternating fabric/felt material structure set out in Specification 6170-4D of the U.S. Department of Agriculture, Forest Service; and the felt is, also, as set out therein.
  • Example 1 Two fabrics were woven from continuous filament aramid yarn having a linear density of 1260 dtex.
  • the yarn had a tenacity of 21.5 grams per dtex and a tensile modulus of 850 grams per dtex.
  • the filaments in that yarn had a linear density of 1.65 dtex.
  • the yarn was as sold by E. I. du Pont de Nemours and Company under the tradename of Kevlar® K-49.
  • One of the fabrics was a 17X17 Plain weave with a weight of 170 g/m 2 (5 oz/yd 2 ). This fabric served as the control or comparison for this example.
  • the other of the fabrics was a 17X17 1/3 (4 Harness) Satin Weave (often called “Crowfoot Weave”) with a weight of 170 g/m 2 (5 oz/yd 2) .
  • test structure was assembled using a felt conforming to the requirements of the aforementioned Specification 6170-4D -- made from para-aramid fiber staple and having an areal density of about 200 grams/square meter (3.5 ounces/square yard) and a thickness of about 1.5, millimeters (0.06 inch).
  • the test structure included two layers of the woven fabric alternated with two layers of the felt and cover layers on the top and the bottom.
  • the cover layers were medium weight nylon cloth; and the layers were bound together only around the periphery of the layers.
  • the first layer under the top cover layer was a woven aramid fabric.
  • the Threshold Stopping Speed was determined in accordance with ASTM F 1414-92a.
  • the Threshold Stopping Speed for the two test structures was determined to be: Sample (TSS) (m/s) Invention 13.6 - 15.0 Comparison 11.5 - 12.2
  • Example 2 Two fabrics were woven from continuous filament aramid yarn having a linear density of 1260 dtex.
  • the filaments in this yarn had a linear density of 1.65 dtex, a tenacity of 21.5 grams per dtex, and a tensile modulus of 674 grams per dtex.
  • the yarn was as sold by E. I. du Pont de Nemours and Company under the tradename of Kevlar® K-29.
  • One of the fabrics was a 17X17 Plain weave with a weight of 170 g/m 2 (5 oz/yd 2 ). This fabric served as the control or comparison for this example.
  • the other of the fabrics was a 17X17 1/3 (4 Harness) Satin Weave (often called “Crowfoot Weave”) with a weight of 170 g/m 2 (5 oz/yd 2) .
  • the fabrics were used in a form with all of the usual filament and yarn finishes which normally accompany commercially-available fabrics (so-called "greige") and, also, in a form wherein those finishes were scoured from the fibers by usual commercial means using water and detergent. Tests were run using both forms.
  • Test structures were assembled using a felt conforming to the requirements of the aforementioned Specification 6170-4D -- made from para-aramid fiber staple and having an areal density of about 200 grams/square meter (3.5 ounces/square yard) and a thickness of about 1.5 millimeters (0.06 inch).
  • the test structures included two layers of the woven fabric alternated with two layers of the felt and cover layers on the top and the bottom.
  • the cover layers were medium weight nylon cloth; and the layers were bound together only around the periphery of the layers.
  • the first layer under the top cover layer was a woven aramid fabric.
  • the Threshold Stopping Speed was determined in accordance with ASTM F 1414-92a.
  • the Threshold Stopping Speed for the test structures was determined to be: Sample (TSS) Improvement (m/s) (m/s) (%) Greige Invention 15.5 Comparison 12.7 2.4 18.9 Scoured Invention 14.6 Comparison 12.3 2.3 18.7

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Woven Fabrics (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Laminated Bodies (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Manufacturing Of Multi-Layer Textile Fabrics (AREA)
  • Details Of Garments (AREA)
  • Toilet Supplies (AREA)

Claims (10)

  1. Struktur eines Opfergewebes (20) für den Schutz vor einem sich bewegenden Kettensägenblatt, einschließlich einer Vielzahl von sich überdeckenden Lagen (21) eines Gewebes, dadurch gekennzeichnet, daß das Gewebe aus Garnen (11, 12) hergestellt wird, die eine Zerreißfestigkeit von wenigstens 10 g/dTex und ein Zugmodul von wenigstens 150 g/dTex haben, gewebt in einer 1/x-Satinbindung, bei der x zwischen 3 und 9 beträgt.
  2. Gewebestruktur nach Anspruch 1, bei der die Garne (11, 12) Aramidgarne sind.
  3. Gewebestruktur nach Anspruch 1, bei der das Garn (11, 12) aus Elementarfäden mit einer Feinheit von 1 bis 8 dTex hergestellt wird.
  4. Gewebestruktur nach Anspruch 1, bei der die Lagen (21) nur um den Umfang der Lagen miteinander verbunden werden.
  5. Gewebestruktur nach Anspruch 1, bei der die Struktur wenigstens eine Filzlage (22) einschließt.
  6. Gewebestruktur nach Anspruch 5, bei der sich die Gewebe- und die Filzlagen (21, 22) abwechseln.
  7. Gewebestruktur nach Anspruch 6, bei welcher der Filz (22) aus Aramid-Stapelfasern hergestellt wird.
  8. Gewebestruktur nach Anspruch 1, bei der die Aramidgarne (11, 12) Poly(pphenylen-terephthalamid)-Fasern einschließen.
  9. Gewebestruktur nach Anspruch 1, bei der das Gewebe aus Aramidgarnen (11, 12) hergestellt wird, die in einer 1/3-Satinbindung gewebt werden.
  10. Gewebestruktur nach Anspruch 9, bei der die Aramidgarne (11, 12) Poly(pphenylen-terephthalamid)-Fasern einschließen.
EP98903794A 1997-02-05 1998-01-29 Schutzgewebe für kettensäge Expired - Lifetime EP0957696B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US3686997P 1997-02-05 1997-02-05
US36869P 1997-02-05
US09/012,613 US5876834A (en) 1998-01-23 1998-01-23 Protective chain saw chaps
US12613 1998-01-23
PCT/US1998/001626 WO1998033406A1 (en) 1997-02-05 1998-01-29 Fabric providing protection from chain saws

Publications (2)

Publication Number Publication Date
EP0957696A1 EP0957696A1 (de) 1999-11-24
EP0957696B1 true EP0957696B1 (de) 2002-05-22

Family

ID=26683782

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98903794A Expired - Lifetime EP0957696B1 (de) 1997-02-05 1998-01-29 Schutzgewebe für kettensäge

Country Status (12)

Country Link
EP (1) EP0957696B1 (de)
JP (1) JP2001513850A (de)
KR (1) KR100459362B1 (de)
CN (1) CN1140200C (de)
AU (1) AU726941B2 (de)
BR (1) BR9807158A (de)
CA (1) CA2276291C (de)
DE (1) DE69805502T2 (de)
EA (1) EA000807B1 (de)
NO (1) NO993751D0 (de)
UA (1) UA46880C2 (de)
WO (1) WO1998033406A1 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1043278A1 (de) * 1999-04-09 2000-10-11 N.V. Bekaert S.A. Ein Beschichtungsmaterial enthaltend ein Textilprodukt mit Fasern aus poly(P-Phenylen-2,6-Benzobisoxazol)
PT1169272E (pt) * 1999-04-09 2002-11-29 Bekaert Sa Nv Material de cobertura resistente ao calor
US6534426B1 (en) * 2000-01-14 2003-03-18 E. I. Du Pont De Nemours And Company Knife-stab-resistant composite
DE10036488A1 (de) * 2000-07-25 2002-02-07 Spezialtextilwerk Funke Textiles Schnittschutzmaterial
CN100386476C (zh) * 2005-12-27 2008-05-07 江苏九鼎新材料股份有限公司 一种伐木防护服衬布
KR100995703B1 (ko) 2008-10-09 2010-11-19 한국패션산업연구원 벌목작업복 바지
KR101229550B1 (ko) * 2011-02-14 2013-02-05 한국생산기술연구원 방탄복용 직물적층구조
DE202012002171U1 (de) * 2012-03-01 2013-06-06 Rökona-Textilwerk Gesellschaft mit beschränkter Haftung, Wirkerei - Ausrüstung Schnittschutzlage für eine Schnittschutztextilie, Schnittschutztextilie und diese aufweisende Arbeitsschutzbekleidung
JP5700314B1 (ja) * 2014-02-17 2015-04-15 株式会社光和 切創防護服用布帛
DE202015006323U1 (de) 2015-09-07 2016-12-09 Arne Sörensen Sicherheitspaneel Verlangsamung kinetischer Einbruchswerkzeuge
JP6941389B2 (ja) * 2019-10-08 2021-09-29 マルイチ エアリアル エンジニア株式会社 切創防止用防護素材及び切創防止具
JPWO2021070264A1 (de) * 2019-10-08 2021-04-15
SE545918C2 (en) * 2022-02-17 2024-03-12 Husqvarna Ab Multi-layer chainsaw protection garment

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4279959A (en) * 1977-11-03 1981-07-21 Rohm And Haas Company Water-insoluble copolymers containing amide-polyaldehyde thermosettable system
FR2581845B1 (fr) * 1985-05-15 1989-09-29 Sip Protection Sa Vetement de travail et de securite
US5578358A (en) * 1995-04-12 1996-11-26 E. I. Du Pont De Nemours And Company Penetration-resistant aramid article
FR2739759B1 (fr) * 1995-10-17 1998-02-06 Oci Sa Tissu destine a etre utilise en matelas multi-couches monte dans un vetement de protection et vetement de protection

Also Published As

Publication number Publication date
EA199900717A1 (ru) 2000-02-28
AU6047098A (en) 1998-08-25
NO993751D0 (no) 1999-08-03
CN1140200C (zh) 2004-03-03
JP2001513850A (ja) 2001-09-04
KR100459362B1 (ko) 2004-12-03
EP0957696A1 (de) 1999-11-24
AU726941B2 (en) 2000-11-23
BR9807158A (pt) 2000-04-25
WO1998033406A1 (en) 1998-08-06
CA2276291A1 (en) 1998-08-06
DE69805502D1 (de) 2002-06-27
DE69805502T2 (de) 2002-12-05
CN1246781A (zh) 2000-03-08
CA2276291C (en) 2005-07-05
KR20000070752A (ko) 2000-11-25
EA000807B1 (ru) 2000-04-24
UA46880C2 (uk) 2002-06-17

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