EP2212459A1 - Method for producing seams on webbings for technical purposes - Google Patents

Method for producing seams on webbings for technical purposes

Info

Publication number
EP2212459A1
EP2212459A1 EP08841822A EP08841822A EP2212459A1 EP 2212459 A1 EP2212459 A1 EP 2212459A1 EP 08841822 A EP08841822 A EP 08841822A EP 08841822 A EP08841822 A EP 08841822A EP 2212459 A1 EP2212459 A1 EP 2212459A1
Authority
EP
European Patent Office
Prior art keywords
webbing
webbings
strength
sewing thread
fine strength
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.)
Withdrawn
Application number
EP08841822A
Other languages
German (de)
French (fr)
Inventor
Michael Schneider
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.)
DSM IP Assets BV
Original Assignee
HOFFMANN AIR CARGO EQUIPMENT G
Hoffmann Air Cargo Equipment 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 HOFFMANN AIR CARGO EQUIPMENT G, Hoffmann Air Cargo Equipment GmbH filed Critical HOFFMANN AIR CARGO EQUIPMENT G
Publication of EP2212459A1 publication Critical patent/EP2212459A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B53/00—Thread- or cord-laying mechanisms; Thread fingers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
    • B66C1/18—Band-type slings

Definitions

  • the invention relates to a method for producing seams on straps for technical purposes, in particular on slings or lashing straps for securing cargo during transport.
  • Technical straps are generally made from chemical fiber yarns.
  • filament yarns made of polyamide (PA 66), polyester (PES) or polypropylene (PP) are used, which are heat-stabilized and resistant to light and aging and have a tenacity of at least 60 cN / tex.
  • Connecting points, for example on end loops for the integration of fitting parts, are sewn, with a surface portion in which the webbing parts to be joined lie on one another, are connected to one another with a plurality of longitudinal and / or transverse seams.
  • the sewing yarn used here is usually the same fibrous material from which the webbing is made, so that the same physical and chemical resistance is given. Especially for particularly demanding applications, such as for webbings, the same fine strength is required for webbing and sewing thread.
  • the invention is therefore based on the object to provide a method for producing seams on straps, which allows an increase in the strength and thus the breaking load of the seam.
  • the invention provides that for the production of the seam, a sewing thread is used whose Fine strength is considerably greater than the fine strength of the pulp or yarn from which the webbing is made.
  • the invention is based on the finding that when using sewing thread with a fine strength that is much higher, for example, twice as high as the fine strength of the yarn of the webbing, the load capacity of the seam can be significantly increased, so that as a result, the load limit for the seamed webbing is substantially increased. It has also been shown that the substantially higher fine strength of the sewing thread has no adverse effects on the strength and also the other functional properties of the webbing. Experiments have further shown that the use of sewing thread of particularly high fine strength compared to the fine strength of the Gurtgarns a strength of the seam connection can be achieved, which is equal to the strength of the webbing or even greater than this.
  • polyester webbings with a sewing thread made of Dyneema brand pulp This is a high tensile strength pulp comprising high linearity linear linear polyethylene fibers.
  • High molecular weight here means an average molecular weight of at least 400,000 g per mole.
  • Linear polyethylene means that it has less than one side chain per 100 carbon atoms, preferably less than one side chain per 300 carbon atoms.
  • the polyethylene may also contain up to 5 mole% of one or more other alkenes copolymerizable therewith, such as propylene, butene, pentene, 4-methylpentene, octene.
  • polyethylene fibers are used for the production of the sewing thread, which consist of filaments which are used in a gel spinning process, as for example in GB-A-2042414 and GB-A-
  • This process includes in Essentially, preparing a solution of polyolefin of high intrinsic viscosity, spinning the solution into filaments at a temperature above the dissolution temperature, cooling the filaments below the temperature at which the gel state is reached, and stretching the filaments before, during, or after removal of the solvent ,
  • the sewing yarn used in a first sample was polyester multifilament yarn having a tenacity of 60 cN / tex and in a second sample yarn made of Dyneema fibers from DSM High Performance Fibers B.V. used with a fine strength of 236 cN / tex.
  • a breaking load of 19602 N was obtained for the first sample and a breaking load of 27291 N for the second sample.

Abstract

In a method for producing seams on webbings for technical purposes, in particular on lifting straps or lashing straps for securing cargo during transport, a sewing thread is used to produce the seam, the fine strength of said sewing thread being significantly greater than the fine strength of the fibrous material or yarn from which the webbing is produced. In this way, the binding load of a webbing having a seam is increased.

Description

VERFAHREN ZUR HERSTELLUNG VON NAHTVERBINDUNGEN AN GURTBÄNDERN FÜR TECHNISCHE ZWECKE METHOD FOR PRODUCING SEAM JOINTS ON BELT BELTS FOR TECHNICAL PURPOSES
Die Erfindung betrifft ein Verfahren zur Herstellung von Nahtverbindungen an Gurtbändern für technische Zwecke, insbesondere an Hebebändern oder Zurrgurten zur Ladungssicherung beim Transport.The invention relates to a method for producing seams on straps for technical purposes, in particular on slings or lashing straps for securing cargo during transport.
Gurtbänder für technische Zwecke werden im Allgemeinen aus Garnen aus Chemiefasern hergestellt. Üblicherweise werden Filamentgarne aus Polyamid (PA 66), Polyester (PES) oder Polypropylen (PP) verwendet, die Wärme stabilisiert und licht- und alterungsbeständig sind und die eine Feinheitsfestigkeit von mindestens 60 cN/tex haben. Verbindungsstellen, beispielsweise an Endschlaufen zur Einbindung von Beschlagteilen, werden genäht, wobei ein Flächenabschnitt, in dem die zu verbindenden Gurtbandteile aufeinanderliegen, mit mehreren längs und/oder quer verlaufenden Nähten miteinander verbunden werden. Als Nähgarn wird hierbei üblicherweise der gleiche Faserstoff angewendet, aus dem das Gurtband besteht, damit gleiche physikalische und chemische Beständigkeit gegeben ist. Insbesondere für besonders anspruchsvolle Anwendungen, wie z.B. für Hebebänder, ist auch die gleiche Feinfestigkeit für Gurtmaterial und Nähgarn vorgeschrieben.Technical straps are generally made from chemical fiber yarns. Usually filament yarns made of polyamide (PA 66), polyester (PES) or polypropylene (PP) are used, which are heat-stabilized and resistant to light and aging and have a tenacity of at least 60 cN / tex. Connecting points, for example on end loops for the integration of fitting parts, are sewn, with a surface portion in which the webbing parts to be joined lie on one another, are connected to one another with a plurality of longitudinal and / or transverse seams. The sewing yarn used here is usually the same fibrous material from which the webbing is made, so that the same physical and chemical resistance is given. Especially for particularly demanding applications, such as for webbings, the same fine strength is required for webbing and sewing thread.
Zugversuche an Gurtbändern mit Nahtverbindungen haben gezeigt, dass die Belastungsgrenze von der Bruchlast der Nahtverbindung bestimmt wird, da diese erheblich kleiner ist als die Bruchlast der Gurtbänder.Tensile tests on webbings with seams have shown that the load limit is determined by the breaking load of the seam joint, as this is considerably smaller than the breaking load of the webbings.
Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren zur Herstellung von Nahtverbindungen an Gurtbändern anzugeben, welches eine Erhöhung der Festigkeit und damit der Bruchlast der Nahtverbindung ermöglicht.The invention is therefore based on the object to provide a method for producing seams on straps, which allows an increase in the strength and thus the breaking load of the seam.
Zur Lösung dieser Aufgabe ist erfindungsgemäß vorgesehen, dass zur Herstellung der Nahtverbindung ein Nähgarn verwendet wird, dessen Feinfestigkeit erheblich größer ist als die Feinfestigkeit des Faserstoffes oder Garnes, aus dem das Gurtband herstellt ist.To solve this problem, the invention provides that for the production of the seam, a sewing thread is used whose Fine strength is considerably greater than the fine strength of the pulp or yarn from which the webbing is made.
Die Erfindung beruht auf der Erkenntnis, dass bei Verwendung von Nähgarn mit einer Feinfestigkeit, die wesentlich höher, beispielsweise doppelt so hoch ist, wie die Feinfestigkeit des Garnes des Gurtbands, die Belastbarkeit der Nahtverbindung wesentlich erhöht werden kann, sodass im Ergebnis auch die Belastungsgrenze für das mit Nahtverbindungen versehene Gurtband wesentlich erhöht wird. Es hat sich weiterhin gezeigt, dass die wesentliche höhere Feinfestigkeit des Nähgarns keine nachteilige Auswirkungen auf die Festigkeit und auch die übrigen Gebrauchseigenschaften des Gurtbands hat. Versuche haben weiterhin gezeigt, dass durch die Verwendung von Nähgarn besonders hoher Feinfestigkeit im Vergleich zur Feinfestigkeit des Gurtgarns eine Festigkeit der Nahtverbindung erreicht werden kann, die gleich der Festigkeit des Gurtbands ist oder noch größer als diese ist.The invention is based on the finding that when using sewing thread with a fine strength that is much higher, for example, twice as high as the fine strength of the yarn of the webbing, the load capacity of the seam can be significantly increased, so that as a result, the load limit for the seamed webbing is substantially increased. It has also been shown that the substantially higher fine strength of the sewing thread has no adverse effects on the strength and also the other functional properties of the webbing. Experiments have further shown that the use of sewing thread of particularly high fine strength compared to the fine strength of the Gurtgarns a strength of the seam connection can be achieved, which is equal to the strength of the webbing or even greater than this.
Besonders günstige Ergebnisse wurden bei Gurtbändern aus Polyester mit einem Nähgarn erzielt, das aus einem Faserstoff der Handelsbezeichnung Dyneema besteht. Hierbei handelt es sich um einen Faserstoff hoher Zugfestigkeit, der hochgestreckte Fasern aus linearem Polyethylen mit hoher Molmasse aufweist. Hohe Molmasse bedeutet hier eine durchschnittliche Molmasse von wenigstens 400.000 g pro Mol. Lineares Polyethylen bedeutet, dass es weniger als eine Seitenkette je 100 C-Atome, vorzugsweise weniger als eine Seitenkette je 300 C-Atome hat. Das Polyethylen kann außerdem bis zu 5 Mol % von einem oder mehreren anderen Alkenen, die damit copolymerisierbar sind, wie Propylen, Buten, Penten, 4-Metylpenten, Octen enthalten.Particularly favorable results have been obtained in polyester webbings with a sewing thread made of Dyneema brand pulp. This is a high tensile strength pulp comprising high linearity linear linear polyethylene fibers. High molecular weight here means an average molecular weight of at least 400,000 g per mole. Linear polyethylene means that it has less than one side chain per 100 carbon atoms, preferably less than one side chain per 300 carbon atoms. The polyethylene may also contain up to 5 mole% of one or more other alkenes copolymerizable therewith, such as propylene, butene, pentene, 4-methylpentene, octene.
Besonders vorteilhaft ist, wenn zur Herstellung des Nähgarns Polyethylenfasern verwendet werden, die aus Filamenten bestehen, die in einem Gelspinnprozess, wie beispielsweise in GB-A-2042414 und GB-A-It is particularly advantageous if polyethylene fibers are used for the production of the sewing thread, which consist of filaments which are used in a gel spinning process, as for example in GB-A-2042414 and GB-A-
2051667 beschrieben, hergestellt sind. Dieser Prozess umfasst im Wesentlichen die Herstellung einer Lösung eines Polyolefins von hoher Grenzviskosität, Spinnen der Lösung zu Filamenten bei einer Temperatur über der Lösetemperatur, Abkühlen der Filamente unter die Temperatur, bei welcher der Gelzustand erreicht wird, und Strecken der Filamente vor, während oder nach der Entfernung des Lösungsmittels.2051667 described are made. This process includes in Essentially, preparing a solution of polyolefin of high intrinsic viscosity, spinning the solution into filaments at a temperature above the dissolution temperature, cooling the filaments below the temperature at which the gel state is reached, and stretching the filaments before, during, or after removal of the solvent ,
Zum Nachweis der erreichbaren Festigkeit einer nach dem erfindungsgemäßen Verfahren herstellten Nahtverbindung an einem Gurtband aus Polyester-Multifilgarn von einer Feinheitsfestigkeit der Fasern von mindestens 60 cN/tex, einer Dicke von 1 ,8 mm und einer Breite von 45 mm wurde das Gurtband zu einer Schlaufe gelegt und das freie Gurtbandende der Schlaufe mit dem Gurtband auf einer Länge von 80 mm mittels schräg zur Längsrichtung des Gurtbands im Zickzack verlaufenden Nähten vernäht. Als Nähgarn wurde bei einer ersten Probe Polyester-Multifilgarn mit einer Feinheitsfestigkeit von 60 cN/tex und bei einer zweiten Probe Garn aus Fasern der Handelsbezeichnung Dyneema der Firma DSM High Performance Fibers B.V. mit einer Feinfestigkeit von 236 cN/tex verwendet. Bei den anschließenden Zugversuchen ergab sich für die erste Probe eine Bruchlast von 19602 N und für die zweite Probe eine Bruchlast von 27291 N.To demonstrate the achievable strength of a produced by the process according to the invention seam on a webbing of polyester multifilament of a tenacity of the fibers of at least 60 cN / tex, a thickness of 1, 8 mm and a width of 45 mm, the webbing into a loop and sewn the free webbing end of the loop with the webbing over a length of 80 mm by means of seams running obliquely to the longitudinal direction of the webbing in zigzag. The sewing yarn used in a first sample was polyester multifilament yarn having a tenacity of 60 cN / tex and in a second sample yarn made of Dyneema fibers from DSM High Performance Fibers B.V. used with a fine strength of 236 cN / tex. In the subsequent tensile tests, a breaking load of 19602 N was obtained for the first sample and a breaking load of 27291 N for the second sample.
Zwei weitere Versuche wurden mit dem gleichen Gurtband und den gleichen Nähgarnen durchgeführt, wobei jedoch die Schlaufe nur auf einer Länge von 40 mm mit 12 im Zickzack verlaufenden Nähten mit dem Gurtband vernäht war. Hierbei ergab sich eine Bruchlast von 24226 N bei der mit dem Nähgarn aus Polyester genähten Probe und eine Bruchlast von 28647 N bei der mit dem Nähgarn aus Dyneema genähten Probe.Two further trials were carried out with the same webbing and sewing threads, but the loop was sewn to the webbing only over a length of 40 mm with 12 zigzag seams. This gave a breaking load of 24,226 N for the sample stitched with the polyester sewing thread and a breaking load of 28,647 N for the sample sewn with the Dyneema sewing thread.
Die Ergebnisse zeigen, dass Bruchlast von mit Nähten versehenen Gurtbändern erheblich gesteigert werden kann, wenn die Nähte erfindungsgemäß aus einem Nähgarn von um ein Mehrfaches höherer Feinfestigkeit als das Gurtbandgarn bestehen. Die Tragfähigkeit des Gurtbandes wird hierdurch besser ausgenutzt. Entsprechend können für gegebene Lastfälle dünnere und damit leichtere Gurtbänder verwendet werden. The results show that the breaking load of stitched webbings can be increased considerably if, in accordance with the invention, the seams consist of a sewing thread of several times higher fine strength than the webbing yarn. The carrying capacity of the webbing is thereby better utilized. Accordingly, for given load cases thinner and thus lighter straps are used.

Claims

ANSPRÜCHE
1. Verfahren zur Herstellung von Nahtverbindungen an Gurtbändern für technische Zwecke, dadurch gekennzeichnet, dass zum Nähen ein Nähgarn verwendet wird, dessen Feinfestigkeit wesentlich größer ist, insbesondere wenigstens das Zweifache der Feinfestigkeit des Faserstoffs beträgt, aus dem das Gurtband herstellt ist.1. A method for producing seams on straps for technical purposes, characterized in that for sewing a sewing yarn is used, the fine strength is substantially greater, in particular at least twice the fine strength of the pulp is from which the webbing is made.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass die Feinfestigkeit des Nähgarns wenigstens das Vierfachen der2. The method according to claim 1, characterized in that the fine strength of the sewing thread at least four times the
Feinfestigkeit des Faserstoffs des Gurtbands ist.Fine strength of the pulp of the webbing is.
3. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Nähgarn aus hochgestreckten Fasern aus linearem Polyethylen mit hoher Molmasse besteht. 3. The method according to any one of the preceding claims, characterized in that the sewing thread consists of high-elongated fibers of linear high molecular weight polyethylene.
EP08841822A 2007-10-26 2008-10-22 Method for producing seams on webbings for technical purposes Withdrawn EP2212459A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007051675A DE102007051675B4 (en) 2007-10-26 2007-10-26 Method of making seams on webbings for technical purposes
PCT/EP2008/064291 WO2009053392A1 (en) 2007-10-26 2008-10-22 Method for producing seams on webbings for technical purposes

Publications (1)

Publication Number Publication Date
EP2212459A1 true EP2212459A1 (en) 2010-08-04

Family

ID=40276075

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08841822A Withdrawn EP2212459A1 (en) 2007-10-26 2008-10-22 Method for producing seams on webbings for technical purposes

Country Status (5)

Country Link
US (1) US20110162568A1 (en)
EP (1) EP2212459A1 (en)
CN (1) CN101910494A (en)
DE (1) DE102007051675B4 (en)
WO (1) WO2009053392A1 (en)

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Publication number Priority date Publication date Assignee Title
DE202015100289U1 (en) * 2015-01-22 2015-03-12 Westdeutscher Drahtseil-Verkauf Dolezych Gmbh & Co. Kg Device for securing cargo on a loading surface

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Also Published As

Publication number Publication date
CN101910494A (en) 2010-12-08
WO2009053392A1 (en) 2009-04-30
DE102007051675B4 (en) 2011-11-24
DE102007051675A1 (en) 2009-04-30
US20110162568A1 (en) 2011-07-07

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