EP0077288A2 - Garn als Verstärkungsmaterial, Verfahren zu seiner Herstellung - Google Patents

Garn als Verstärkungsmaterial, Verfahren zu seiner Herstellung Download PDF

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Publication number
EP0077288A2
EP0077288A2 EP82630096A EP82630096A EP0077288A2 EP 0077288 A2 EP0077288 A2 EP 0077288A2 EP 82630096 A EP82630096 A EP 82630096A EP 82630096 A EP82630096 A EP 82630096A EP 0077288 A2 EP0077288 A2 EP 0077288A2
Authority
EP
European Patent Office
Prior art keywords
yarn
fabric
fill yarn
fill
core
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Withdrawn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
EP82630096A
Other languages
English (en)
French (fr)
Other versions
EP0077288A3 (de
Inventor
Abdel-Hadi Sid-Ahmed
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.)
Goodyear Tire and Rubber Co
Original Assignee
Goodyear Tire and Rubber 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 Goodyear Tire and Rubber Co filed Critical Goodyear Tire and Rubber Co
Publication of EP0077288A2 publication Critical patent/EP0077288A2/de
Publication of EP0077288A3 publication Critical patent/EP0077288A3/de
Withdrawn legal-status Critical Current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
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/36—Cored or coated yarns or threads
    • 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
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/40—Yarns in which fibres are united by adhesives; Impregnated yarns or threads
    • D02G3/404—Yarns or threads coated with polymeric solutions
    • 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
    • D02G3/48—Tyre cords

Definitions

  • the present invention relates to a new type of fill yarn, its method of manufacture, uses thereof and methods of using said fill yarn, in particular its uses in the tabby portion of tire cord fabric.
  • Fabric used in the reinforcing of tires is normally comprised of the tire cords placed in the warp or longitudinal direction of the fabric and being woven or held by a relatively weak fill yarn placed perpendicular to the cords.
  • the number of cords per inch in tire cord fabrics normally varies between 15 and 25 depending on the end uses.
  • the number of fill yarn per inch varies between 1/2 to 2.
  • the tire cord could be made from any one of the typical polymeric reinforcing materials such as polyester, nylon, aramid, fiberglass, rayon, polyvinyl alcohol, etc.
  • the fill yarn normally is made from staple fiber such as polyester, cotton, rayon, nylon, etc. or blends thereof.
  • the fill yarnsdo not contribute to the reinforcement of tires and its purpose ceases once the fabric is calendered or sandwiched between uncured rubber stock.
  • the main purpose of the fill yarn is to maintain the structural integrity of the fabric during treatment. It is a common practice to treat fabric used in reinforcing tires by dipping the fabric in a liquid medium such as a latex. This treatment is to improve the adhesion between the fabric and the rubber matrix of the tire.
  • the untreated fabric is normally wound into a roll.
  • the high concentration of the fill yarn at the tabby contributes to the strength of the splice or seam.
  • the splice must withstand the high tensions encountered during the treatment of the fabric at the dip unit and calender.
  • the tabby is not used in reinforcing tires and is discarded at some point of the operation. Normally, several yards of the treated tire cord fabric adjacent to the tabby are also discarded as waste.
  • the tabby splice being narrower than the roll's width, contributes to tire cord fabric scrap which begins from the tabby and extends on both sides of the splice into the tire cord fabric sections by several yards. The amount of scrap can vary between 10 and 30 yards depending on the tire cord fabric construction and the treatment.
  • This curtaining effect results in tire cord fabric scrap.
  • Some of the typical defects resulting in the scrapping of fabric are: (1) different dip penetration; (2) webbing streaks (layer of adhesive film connecting the adjacent tire cords in the fabric); (3) fabric splitting lengthwise and caused by the spreaders of the machine in an attempt to bring the splice width equal to fabric width, and (4) crushed cords occurring at the dip roll of the calender due to the wavy and folding condition of the section of the fabric found near the tabby. It has long been desired to reduce this curtaining effect and therefore the amount of scrap fabric resulting therefrom.
  • the present invention helps to alleviate the effects of some of the aforementioned problems by the use of a fill yarn having a readily deformable surface.
  • the fill yarn although not limited thereto, can be comprised of a core comprised of one or more yarns, including monofilaments, but preferably one yarn surrounded by a sheath having a deformable nature.
  • deformable is meant a surface which when subjected to the stresses and strains normally encountered by a fill yarn during tensioning of a tire cord fabric either prior to or during dipping, or at any other point in the processing of the tire cord fabric, will deform to accommodate the movement of the warp cord as a result of placing tension on said cord.
  • Figure lA there is illustrated a view of tire cord fabric 1 showing the warp cord 3 and fill yarn 2 of the present invention and the tabby portion 4 at the end of the fabric where the fill yarn 2 is more highly concentrated. It should be noted that conventional fill yarn used in the body of the fabric is normally lighter than the fill yarn used in the tabby portion of the fabric.
  • This sheath can be comprised of any material which will deform under the stresses and strains mentioned earlier herein. Naturally, the sheath should not be of a composition which would interfere with the characteristics of warp cord which are required to permit the cord to operate effectively in a tire. For example, it should not interfere with the adhesion of the cord to the surrounding rubber matrix in a tire.
  • the sheath can be comprised, but is not limited to, foam rubber. It can also be comprised, but is not limited to, filaments or strands spirally wrapped around the core.
  • the filaments or strands can be wrapped around the core one strand or filament at a time or several strands or filaments can be wrapped around the core simultaneously. From a practical manufacturing and processing standpoint, it is preferred that several strands be wrapped around the core simultaneously, for example, five to ten strands at a time. More than one layer of cords can be used.
  • the core is flexible, strong, extensible material which can consist of one or more yarns.
  • the core characteristics are merely those industrial strength characteristics possessed by conventional fill yarns.
  • most if not all conventional fill yarns can be converted to fill yarns of the present invention by applying to them a sheath such as described herein.
  • the method by which the outer sheath is applied to the core is not significant so long as the sheath retains its soft, deformable characteristics and the core remains flexible, strong, and extensible.
  • conventional fill yarns The purpose of conventional fill yarns is to hold the warp cords in position and prevent them from moving up and down or from side to side. It is believed that this is accomplished by the friction at the interface of the fill yarn and the warp cord. Unfortunately, in the use of conventional fill yarn, this also results when the warp cord is placed under tension in a curving of the fill yarn and therefore a shortening of the fabric width.
  • the soft, deformable sheath surrounding the cord of the fill yarn deforms when the warp cord is placed under tension, maintaining the friction between the warp cord and the fill yarn, and in fact partially surrounding the warp cord to prevent its movement, thereby reducing the change in the shape of the core, and thereby permitting the fill yarn to retain a large portion of its original length even when the warp cord is placed under tension.
  • the fill yarn of the present invention it is not necessary for the fill yarn of the present invention to reduce the tabby shrinkage entirely. Rather, it is sufficient if the shrinkage due to mechanical stress is just measurably reduced over conventional fill yarns used for the tabby portions of fabric, for example, over the shrinkage obtained using the core alone as the fill yarn.
  • Various materials can be used for the core and sheath including, but not limited to, polymeric materials, such as nylon, rayon, polyester, cotton and aramid yarns, or blends thereof.
  • Figures 6A, 6B, 6c, and 6D illustrate but do not limit methods by which fill yarn of the present invention can be prepared.
  • Figure 6A illustrates a ring-twister 12 with one set of feed rolls 11.
  • the yarn with the higher count will normally wrap around the heavy yarn.
  • 7 ends of 13's (16-Z turns per inch) 9 and one end of 4's (9-Z turns per inch 10 are twisted together into a 9-S turn per inch with the 4's yarn 10 being completely wrapped with the 13's yarn 9 to form the fill yarn 12.
  • Figure 6B illustrates a ring twister 13 with two sets of feed rolls 11 and 14.
  • the 4's yarn 10 is fed at a slower rate than the 13-Is yarns 9 resulting in a better defined fill yarn 12 construction than is normally obtained by the process illustrated in Figure 6A.
  • Figure 6c illustrates the use of a yarn cover machine 15 which results in a preferred fill yarn 12 structure.
  • Figure 6D illustrates the coating of a yarn 10 with a polymer 17 using an extruder 16 to form a fill yarn 12 of the present invention.
  • a nylon tire fabric with a body width of 60 inches had a tabby width of 56 inches when using a conventional tabby fill yarn.
  • the tabby width was 59.5 inches.
  • the body width was reduced to 54 inches.
  • the tabby with the conventional fill yarn had a width of 48 inches, while the tabby with the fill yarn of the present invention had a width of 53 inches.
  • the fill yarn of the.present invention can be used in the body of the fabric, as well as the tabby portion. Where the body of fabric is subject to severe thermal shrinkage conditions and mechanical tensioning such that the combination of factors results in unreasonable width reduction in the body of the fabric, the use of the fill yarn of the present invention in the body of the fabric is beneficial.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Woven Fabrics (AREA)
  • Tires In General (AREA)
EP82630096A 1981-10-14 1982-10-14 Garn als Verstärkungsmaterial, Verfahren zu seiner Herstellung Withdrawn EP0077288A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US31113481A 1981-10-14 1981-10-14
US311134 1981-10-14

Publications (2)

Publication Number Publication Date
EP0077288A2 true EP0077288A2 (de) 1983-04-20
EP0077288A3 EP0077288A3 (de) 1985-11-06

Family

ID=23205565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82630096A Withdrawn EP0077288A3 (de) 1981-10-14 1982-10-14 Garn als Verstärkungsmaterial, Verfahren zu seiner Herstellung

Country Status (4)

Country Link
EP (1) EP0077288A3 (de)
JP (1) JPS5870726A (de)
AU (1) AU8931482A (de)
BR (1) BR8205790A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4316415A1 (de) * 1993-05-17 1994-11-24 Akzo Nobel Nv Gewebebahn
EP2037022A2 (de) 2007-09-14 2009-03-18 The Goodyear Tire & Rubber Company Reifenkord
WO2013076617A1 (en) 2011-11-22 2013-05-30 Kordsa Global Endustriyel Iplik Ve Kord Bezi̇ Sanayi̇ Ve Ticaret Anonim Sirketi A tire cord fabric with tabby

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1444115A1 (de) * 1962-05-15 1968-10-24 Karl Plate Gmbh Dr Faeden fuer Papiermaschinensiebe und Verfahren zu ihrer Herstellung
US3551280A (en) * 1969-04-01 1970-12-29 Delta Rope & Twine Ltd Synthetic twines and method of production thereof
US4093512A (en) * 1975-04-23 1978-06-06 Huyck Corporation Papermakers belts having ultra-high modulus load bearing yarns

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1444115A1 (de) * 1962-05-15 1968-10-24 Karl Plate Gmbh Dr Faeden fuer Papiermaschinensiebe und Verfahren zu ihrer Herstellung
US3551280A (en) * 1969-04-01 1970-12-29 Delta Rope & Twine Ltd Synthetic twines and method of production thereof
US4093512A (en) * 1975-04-23 1978-06-06 Huyck Corporation Papermakers belts having ultra-high modulus load bearing yarns

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4316415A1 (de) * 1993-05-17 1994-11-24 Akzo Nobel Nv Gewebebahn
DE4316415C2 (de) * 1993-05-17 2003-10-16 Akzo Nobel Nv Verfahren zur Herstellung einer Gewebebahn
EP2037022A2 (de) 2007-09-14 2009-03-18 The Goodyear Tire & Rubber Company Reifenkord
EP2037022A3 (de) * 2007-09-14 2011-11-23 The Goodyear Tire & Rubber Company Reifenkord
WO2013076617A1 (en) 2011-11-22 2013-05-30 Kordsa Global Endustriyel Iplik Ve Kord Bezi̇ Sanayi̇ Ve Ticaret Anonim Sirketi A tire cord fabric with tabby

Also Published As

Publication number Publication date
BR8205790A (pt) 1983-09-06
EP0077288A3 (de) 1985-11-06
JPS5870726A (ja) 1983-04-27
AU8931482A (en) 1983-04-21

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Inventor name: SID-AHMED, ABDEL-HADI