EP0156503A1 - Fil à coudre comprenant une matière thermoplastique; procédé de couture et produit obtenu - Google Patents

Fil à coudre comprenant une matière thermoplastique; procédé de couture et produit obtenu Download PDF

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Publication number
EP0156503A1
EP0156503A1 EP85301153A EP85301153A EP0156503A1 EP 0156503 A1 EP0156503 A1 EP 0156503A1 EP 85301153 A EP85301153 A EP 85301153A EP 85301153 A EP85301153 A EP 85301153A EP 0156503 A1 EP0156503 A1 EP 0156503A1
Authority
EP
European Patent Office
Prior art keywords
thread
thermoplastic material
sewing
yarns
sewn
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Withdrawn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
EP85301153A
Other languages
German (de)
English (en)
Inventor
Haim Gershoni
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.)
Shenkar College of Textile Technology and Fashion
Original Assignee
Shenkar College of Textile Technology and Fashion
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 Shenkar College of Textile Technology and Fashion filed Critical Shenkar College of Textile Technology and Fashion
Publication of EP0156503A1 publication Critical patent/EP0156503A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
    • D02G3/46—Sewing-cottons or the like
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D27/00—Details of garments or of their making
    • A41D27/24—Hems; Seams

Definitions

  • the present invention relates to textiles generally and more particularly to sewing threads, techniques of sewing with such threads,and sewn products produced thereby.
  • lock stitch In the textile industry a wide variety of stitches are employed.
  • a lock stitch is conventionally employed when it is sought to prevent the unravelling of a chain of stitches when the thread is broken at a given location therealong.
  • Lock stitches have the inherent disadvantage that they can only be produced by sewing machines which employ a bobbin. Since bobbins are limited to a relatively short length of thread, they require frequent replacement, which presently requires the attention of an operator. Thus lock stitching is not suitable for automated operations wherein it is sought to dispense with frequent operator attention.
  • German Offenlegungsschrift D E 3142507 a thread comprising a bundle of yarns which are held together by an adhesive material which is prevented from escape to the outside of the thread.
  • the invention aims at solving the problem of unravelling that occurs frequently in conventional chain stitched textile products.
  • a sewing thread formed of a plurality of yarns twisted together, wherein at least one of the plurality of yarns is formed of a thermoplastic material which becomes adhesive upon heat treatment thereof, said plurality of yarns being twisted such that said at least one yarn of a thermoplastic material is exposed to the outside of the thread in accordance with the twisting pattern, the thermoplastic material being maintained in a substantially non-adhesive state prior to sewing.
  • the yarn formed of a thermoplastic material may comprise a monofilament.
  • the yarn formed of a thermoplastic material may comprise a yarn including adhesive fibers.
  • the yarn formed of a thermoplastic material may comprise a multifilament yarn.
  • a method of sewing comprising the steps of sewing a textile material with a thread formed of a plurality of yarns twisted together, wherein at least one of the plurality of yarns is formed of a thermoplastic material which becomes adhesive upon heat treatment thereof, the plurality of yarns being twisted such that the yarn or yarns formed of a thermoplastic material is exposed to the outside of the thread and applying heat to the sewn textile material at the location of thread engagement therewith sufficient to cause the thermoplastic material to assume an adhesive state, thereby to bond the sewn thread at points of intersection thereof in the sewn material.
  • the sewing step may include sewing in a chain stitch.
  • a product including sewn portions employing a sewing thread formed of a plurality of yarns twisted together, wherein at least one of the plurality of yarns is formed of a thermoplastic material which becomes adhesive upon heat treatment thereof, said plurality of yarns being twisted such that said at least one yarn of a thermoplastic material is exposed to the outside of the thread in accordance with the twisting pattern, the thermoplastic material being maintained in a substantially non-adhesive state prior to sewing.
  • a product having sewn portions formed by the steps of sewing a textile material with a thread formed of a plurality of yarns twisted together, wherein at least one of the plurality of yarns is formed of a thermoplastic material which becomes adhesive upon heat treatment thereof, the plurality of yarns being twisted such that the yarn or yarns formed of a thermoplastic material is exposed to the outside of the thread and applying heat to the sewn textile material at the location of thread engagement therewith sufficient to cause the thermoplastic material to assume an adhesive state, thereby to bond the sewn thread at points of their intersection in the sewn material.
  • Fig. 1 illustrates a conventional chain stitch.
  • the chain stitch shown in Fig. 1 corresponds to the so-called "Federal Stitch Type 101".
  • Such a stitch is formed with one thread drawn from what may be a large spool or cone normally mounted above the sewing machine. The needle pushes a loop of thread through the cloth and also through the previous loop which for this purpose is held by a "looper” and in this way a chain of interlocking loops is formed.
  • 1 and 2 are respectively the top and bottom moieties (faces) of the stitch.
  • the bottom face 2 comprises a plurality of loops 3 each of which is engaged by the one on the left-hand side and engages the one on the right-hand side and in this way the chain stitch is formed.
  • Chain stitches have the advantage that all threads are supplied from above where the thread source may be easily observed so that timely replacement of an exhausted spool or cone can be undertaken. Furthermore, the thread supply is usually from large cones or spools holding very substantial supplies of thread.
  • Chain stitches have however the disadvantage that the stitches are readily unravelled so that a seam is completely opened in cases where the thread is broken only in one spot., For example, if the thread is cut at line 4 this frees the loop at 5 and if the thread is pulled at 6 the loops in each stitch will successively free the stitches one after the other until the whole seam is open.
  • FIG. 2 Another important variation of the chain stitch is the Two Thread Chain Stitch and an example thereof known as Federal Stitch Type 401 is shown in Fig. 2.
  • two threads are fed from large cones above the - machine.
  • One thread is pushed through the cloth by the needle from above making loops below the cloth and the second thread is fed to a "looper" below the cloth and this looper thrusts loops of the looper thread through the needle loops to retain the stitch.
  • Fig. 2, 7 and 8 are respectively the top and bottom faces of the two-thread chain stitch.
  • the first thread is shown at 9 and the second at 10.
  • This stitch also has the same drawback as that according to Fig. 1 in that it may be unravelled. Thus, for example, if the second threads are cut at lines 11 and 12, loop 13 is freed and a pull at 14 will unravel the entire seam.
  • FIG. 3 A typical lock stitch is shown in Fig. 3. As shown, this again is a two-thread system in which the top face 15 is made of a first thread 16 and the bottom face 18 is made of a second thread 17, the said faces interlocking through vertical loops 19. To produce such a stitch the needle thread is fed from a large spool or cone above the machine and a second bobbin thread is supplied from a very small spool - the bobbin - which is located within the sewing medium underneath the cloth.
  • Lock stitches are more secure than chain stitches since each stitch is locked and if the thread is cut the seam will only open a stitch or two.
  • the lock stitch requires a bobbin thread which is a significant disadvantage.
  • the bobbin thread is expended frequently and must be replenished which causes considerable interruptions as both replacing and winding a new one are time consuming operations.
  • the bobbin thread which is hidden from the operator may run out at random in the seam.
  • the seam may require special treatment and resewing when this occurs in the middle of a seam.
  • the adhesive material may be applied to the elongated structure in various ways.
  • one or more filaments of an adhesive material is included in the twisting process together with conventional filaments or staple yarn to produce a structure according to the invention.
  • fibers of thermoplastic are blended into the basic yarn fibers during the spinning process, yielding a conventional type yarn with adhesive fibers included among the basic fibers of the yarn.
  • yarns of adhesive fibers are combined with conventional yarns in a doubling process.
  • a thread composed of three yarns twisted together, two of which are normal and one made of adhesive fibers.
  • Such a thread is illustrated in Fig. 4.
  • the adhesive yarn 20 is twisted with two conventional non-adhesive yarns 22 and 24 and the adhesive yarn is exposed to the outside of the thread.
  • Figs. 5A and 5B illustrate generally how the thread 26 of the present invention (Fig. 4) appears in a chain stitch, joining two portions of fabric 28 and 30, prior to heat treatment and activation of the adhesive.
  • the illustrations appearing in Figs. 5A, 5B and 5C are merely intended to represent the thread and do not purport to show the actual appearance of the thread as it would be seen under a microscope.
  • the appearance of the stitch in reality, particularly at curved portions thereof is much less clear than that shown.
  • the invention also comprises a method of manufacture and processing of textiles to make a textile article, using a thread as described and illustrated hereinabove and subjecting the resulting textile article to heat treatment.
  • Fig. 5C illustrates the chain stitch of Fig. 5B after heat treatment.
  • the cross-hatching indicates a smear of adhesive from the adhesive yarn 20. It can be assumed that the portions of adhesive yarn 20 adhere to each other where adjacent, such as at reference numerals 30 and that the adhesive yarn may or may not adhere to non-adhesive portions of the thread or of the fabric joined thereby, depending, of course, on the composition thereof.
  • thermoplastic and thermosetting materials can be used for the purposes of the present invention, provided they are compatible with textile materials and that their softening points are at a temperature at which the textile is not damaged.
  • copolyamides and copolyesters may be mentioned.
  • a preferred embodiment of the invention employs K115 melt bonding multifilament manufactured and sold by Grilon of Ems, Switzerland.
  • EXAMPLE A TWO THREAD CHAIN STITCH FOR JOINING TWO PIECES.
  • a thread was made of polyester yarns twisted together with heat curable fibers made from a low melting point nylon. Seams were made using the two-thread chain stitch - F.S.T. 401 - with this thread in the looper and with a conventional sewing thread in the needle. The seam strength of the experimental thread was stronger than comparable seams sewn with conventional thread. Moreover the normal seam could be unravelled by a force of only 10 grams pulling the thread. The seam sewn with the adhesive thread could not be unravelled. When attempts were made to unravel the seam a load of 1090 grams was reached at whichpoint the thread broke.
  • a hydrostatic head of water is applied to one side of a sewn seam, for example.
  • the head of water is increased until water begins to penetrate the seam, and the head of water at this point is considered a measure of the seam's resistance to water penetration.
  • a heavy canvas tenting 40 was joined in a conventional lap seam with a 401 stitch 42 made from a conventional 70/2 cotton thread as needle thread and a looper thread made of two 100 dtex polyester yarns twisted together with one 110 dtex yarn of adhesive multifilament.
  • the seam was heated with a conventional pressing iron to activate the adhesive and tested to determine the hydrostatic head at which water penetrated the seam.
  • the blind stitch is essentially a single thread chain stitch sewn from the back side of the cloth with the needle penetrating only half way through the cloth. (Federal stitch type 103). The stitching thus appears only on the back of the cloth and the stitches are therefore not seen on the front of the garment. Such blind stitching has the great advantage of being invisible on the face of the garment. According to conventional techniques, however, such blind stitched seams are chain stitched., and therefore the seams frequently unravel.
  • a hem 50 was sewn with a ticket no 180 210 dtex thread 52 composed of one lOO dtex polyester yarn twisted together with one 110 dtex yarn made of adhesive multifilament.
  • buttons sewn to fabric with a chain stitch frequently fall from the garment due to the unravelling of the chain of stitches.
  • buttons 60 were chain stitched to various fabrics 62 with a thread 64 made from 2 100 dtex polyester yarns plus one 110 dtex adhesive multifilament yarn twisted together into a thread.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
EP85301153A 1984-02-23 1985-02-21 Fil à coudre comprenant une matière thermoplastique; procédé de couture et produit obtenu Withdrawn EP0156503A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL71041 1984-02-23
IL71041A IL71041A (en) 1984-02-23 1984-02-23 Yarns and threads and their use in the fabrication of textile products

Publications (1)

Publication Number Publication Date
EP0156503A1 true EP0156503A1 (fr) 1985-10-02

Family

ID=11054866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85301153A Withdrawn EP0156503A1 (fr) 1984-02-23 1985-02-21 Fil à coudre comprenant une matière thermoplastique; procédé de couture et produit obtenu

Country Status (6)

Country Link
EP (1) EP0156503A1 (fr)
JP (1) JPS60246835A (fr)
AU (1) AU3911985A (fr)
IL (1) IL71041A (fr)
PH (1) PH21617A (fr)
ZA (1) ZA851307B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4215176A1 (de) * 1992-05-08 1993-11-18 Gerd Ebert Nähfaden, hiermit vernähtes Flächengebilde sowie Verfahren zur Herstellung einer spritzwasserdichten Naht
DE4223853A1 (de) * 1992-07-20 1994-01-27 Gerd Ebert Nähfaden, Verfahren zur Herstellung von aufreißfesten Kettenstichnähten sowie Kettenstichnaht
US5366797A (en) * 1992-01-15 1994-11-22 Hoechst Aktiengesellschaft Bonded yarn bundle, and textile sheet materials obtainable therefrom
DE10001611A1 (de) * 2000-01-17 2001-08-02 Schmale Holding Gmbh & Co Verfahren und Vorrichtung zum maschinellen Verriegeln einer Kettenstichnaht
EP1479802A1 (fr) * 2003-05-05 2004-11-24 Amann & Söhne GmbH & Co. KG Fil à coudre et son procédé de fabrication
EP1826300A2 (fr) * 2006-02-27 2007-08-29 Amann & Söhne GmbH & Co. KG Pièce confectionnée pourvue d'une couture ou d'une broderie
CN1977073B (zh) * 2004-06-29 2010-06-02 井上株式会社 发泡成形体以及发泡成形体的制造方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63219677A (ja) * 1987-03-09 1988-09-13 東海化成工業株式会社 縫製方法
JPH08173660A (ja) * 1993-04-23 1996-07-09 Kaname Yamawaki ミシン縫い方法およびその装置
JPH08243273A (ja) * 1995-03-07 1996-09-24 Masayoshi Tamura 下糸を用いず上糸一本で縫う事が出来るミシン。
JPH0984980A (ja) * 1995-09-20 1997-03-31 Hirose Mfg Co Ltd ミシン

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2049543A1 (de) * 1969-10-08 1971-05-06 Kanegafuchi Boseki K K , Tokio Nahfaden und Verfahren zu seiner Her stellung
US3649399A (en) * 1967-11-08 1972-03-14 Manzen Co Ltd Method in tailoring of preventing one side of cloth folded back from being unfolded
FR2314958A1 (fr) * 1975-06-17 1977-01-14 Payen & Cie L Nouvelle etoffe pour le renforcement des corps en matiere plastique armee

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3649399A (en) * 1967-11-08 1972-03-14 Manzen Co Ltd Method in tailoring of preventing one side of cloth folded back from being unfolded
DE2049543A1 (de) * 1969-10-08 1971-05-06 Kanegafuchi Boseki K K , Tokio Nahfaden und Verfahren zu seiner Her stellung
FR2314958A1 (fr) * 1975-06-17 1977-01-14 Payen & Cie L Nouvelle etoffe pour le renforcement des corps en matiere plastique armee

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5366797A (en) * 1992-01-15 1994-11-22 Hoechst Aktiengesellschaft Bonded yarn bundle, and textile sheet materials obtainable therefrom
DE4215176A1 (de) * 1992-05-08 1993-11-18 Gerd Ebert Nähfaden, hiermit vernähtes Flächengebilde sowie Verfahren zur Herstellung einer spritzwasserdichten Naht
DE4223853A1 (de) * 1992-07-20 1994-01-27 Gerd Ebert Nähfaden, Verfahren zur Herstellung von aufreißfesten Kettenstichnähten sowie Kettenstichnaht
DE10001611A1 (de) * 2000-01-17 2001-08-02 Schmale Holding Gmbh & Co Verfahren und Vorrichtung zum maschinellen Verriegeln einer Kettenstichnaht
DE10001611C2 (de) * 2000-01-17 2001-11-08 Schmale Holding Gmbh & Co Verfahren und Vorrichtung zum maschinellen Verriegeln einer Kettenstichnaht
US6390004B2 (en) 2000-01-17 2002-05-21 Schmale-Holding Gmbh & Co. Double-chain stitching method and apparatus
EP1479802A1 (fr) * 2003-05-05 2004-11-24 Amann & Söhne GmbH & Co. KG Fil à coudre et son procédé de fabrication
US6905764B2 (en) 2003-05-05 2005-06-14 Amann & Soehne Gmbh & Co. Kg Sewing thread and method for producing such as a sewing thread
CN1977073B (zh) * 2004-06-29 2010-06-02 井上株式会社 发泡成形体以及发泡成形体的制造方法
EP1826300A2 (fr) * 2006-02-27 2007-08-29 Amann & Söhne GmbH & Co. KG Pièce confectionnée pourvue d'une couture ou d'une broderie
EP1826300A3 (fr) * 2006-02-27 2008-08-06 Amann & Söhne GmbH & Co. KG Pièce confectionnée pourvue d'une couture ou d'une broderie

Also Published As

Publication number Publication date
JPS60246835A (ja) 1985-12-06
IL71041A0 (en) 1984-05-31
IL71041A (en) 1986-07-31
AU3911985A (en) 1985-09-05
ZA851307B (en) 1985-10-30
PH21617A (en) 1987-12-11

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Inventor name: GERSHONI, HAIM