EP0488873A1 - Fabrication process for cords intended for tensile load, particularly for strings of tennis rackets and musical instruments, and strings thus obtained - Google Patents

Fabrication process for cords intended for tensile load, particularly for strings of tennis rackets and musical instruments, and strings thus obtained Download PDF

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Publication number
EP0488873A1
EP0488873A1 EP91403179A EP91403179A EP0488873A1 EP 0488873 A1 EP0488873 A1 EP 0488873A1 EP 91403179 A EP91403179 A EP 91403179A EP 91403179 A EP91403179 A EP 91403179A EP 0488873 A1 EP0488873 A1 EP 0488873A1
Authority
EP
European Patent Office
Prior art keywords
process according
strings
sheath
wire
staple fibers
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.)
Granted
Application number
EP91403179A
Other languages
German (de)
French (fr)
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EP0488873B1 (en
Inventor
Michel Maurice Najotte
Michel Olivier Guyot
Guy Jean Delcroix
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.)
Guyot Michel
Regnault Reynolds SA
Original Assignee
Guyot Michel
Regnault Reynolds SA
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 Guyot Michel, Regnault Reynolds SA filed Critical Guyot Michel
Publication of EP0488873A1 publication Critical patent/EP0488873A1/en
Application granted granted Critical
Publication of EP0488873B1 publication Critical patent/EP0488873B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10D—STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
    • G10D3/00—Details of, or accessories for, stringed musical instruments, e.g. slide-bars
    • G10D3/10—Strings
    • 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
    • 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
    • D02G3/444—Yarns or threads for use in sports applications

Abstract

The process for the manufacture of strings according to the invention is of the type comprising a stage in which a string is produced from fibres, a stage in which the string is impregnated with a resin,a stage in which the impregnated string is coated with a synthetic material to provide it with a sheath, a stage in which the synthetic material is crosslinked completely, and a stage in which the thickness of the sheath is adjusted. It is characterised in that, to produce the string, noncontinuous fibres are employed, which are subjected to textile intersecting and drawing-twisting operations. The process according to the invention makes it possible to produce strings intended to be subjected to tractions, especially strings for rackets and musical instruments.

Description

La présente invention concerne un procédé de fabrication de cordes destinées à être soumises à des tractions, notamment de cordes pour raquettes et instruments de musique, comprenant une étape dans laquelle on réalise un fil à partir de fibres, une étape dans laquelle on imprègne le fil avec une résine, une étape dans laquelle on enduit le fil imprégné avec une matière synthétique pour le munir d'une gaine, une étape dans laquelle on fait réticuler complètement la matière synthétique, et une étape dans laquelle on ajuste l'épaisseur de la gaine.The present invention relates to a method of manufacturing strings intended to be subjected to traction, in particular strings for rackets and musical instruments, comprising a step in which a thread is made from fibers, a step in which the thread is impregnated with a resin, a step in which the impregnated wire is coated with a synthetic material to provide it with a sheath, a step in which the synthetic material is completely crosslinked, and a step in which the thickness of the sheath is adjusted .

Les cordes obtenues par la mise en oeuvre de ce procédé comportent un fil central constitué de fibres continues. Lorsqu'elles sont montées sur des raquettes, ces cordes ont alors tendance à vibrer sous les impacts des balles et à transmettre leurs vibrations jusqu'au bras des joueurs. Or ces vibrations risquent d'engendrer des lésions anatomiques dites "tennis elbow" ayant des conséquences dommageables tant sur le jeu que sur la santé du joueur.The strings obtained by the implementation of this process comprise a central wire made up of continuous fibers. When mounted on rackets, these strings then tend to vibrate under the impact of the balls and transmit their vibrations to the players' arms. However, these vibrations risk causing anatomical lesions called "tennis elbow" having damaging consequences both on the game and on the player's health.

La présente invention se propose plus particulièrement de remédier à cet inconvénient et, pour ce faire, elle a pour objet un procédé de fabrication de cordes destinées à être soumises à des tractions, procédé du type comportant les étapes mentionnées ci-dessus et qui est caractérisé en ce que pour réaliser le fil, on utilise des fibres discontinues que l'on soumet à des opérations textiles d'intersecting et d'étirage-tordage, l'intersecting ayant pour but d'orienter les fibres parallèlement les unes aux autres, tandis que l'étirage-tordage permet d'obtenir un fil continu.The present invention proposes more particularly to remedy this drawback and, to do this, it relates to a method of manufacturing ropes intended to be subjected to pull-ups, method of the type comprising the steps mentioned above and which is characterized in that in order to make the yarn, staple fibers are used which are subjected to textile operations of intersecting and stretching-twisting, the purpose of intersecting being to orient the fibers parallel to each other, while that stretching-twisting provides a continuous thread.

Les fibres discontinues permettent d'obtenir une corde capable de limiter et d'amortir plus rapidement les vibrations s'exerçant sur elle lorsqu'elle est soumise à des tractions. En montant cette corde sur une raquette, on peut donc éviter que les vibrations dues aux impacts des balles soient transmises au bras du joueur et affectent les performances de ce dernier.The staple fibers make it possible to obtain a rope capable of limiting and damping the vibrations exerted on it more quickly when it is subjected to traction. By mounting this rope on a racket, we can avoid that vibrations due to the impacts of balls are transmitted to the player's arm and affect performance of the latter.

Pour obtenir une corde présentant un excellent pouvoir d'amortissement, il est souhaitable que les fibres discontinues aient une longueur de l'ordre de 20 à 500 mm, de préférence de 50 à 250 mm, titrent de l'ordre de 1 à 100 dtex, de préférence de l'ordre 1 à 20 dtex et présentent une frisure de l'ordre de 4 à 12 par centimètre.To obtain a rope with excellent damping power, it is desirable that the staple fibers have a length of the order of 20 to 500 mm, preferably 50 to 250 mm, size of the order of 1 to 100 dtex , preferably of the order of 1 to 20 dtex and have a crimp of the order of 4 to 12 per centimeter.

Il est par ailleurs avantageux d'utiliser des fibres discontinues réalisées en au moins un matériau choisi dans le groupe comprenant les fibres textiles naturelles, le carbone, le verre, les métalloïdes, les métaux, les alliages métalliques, les polyesters, les polyéthers, les polyuréthanes, les polyamides, les polyoléfines, les composés acryliques, les composés vinyliques et les aramides.It is also advantageous to use staple fibers made of at least one material chosen from the group comprising natural textile fibers, carbon, glass, metalloids, metals, metal alloys, polyesters, polyethers, polyurethanes, polyamides, polyolefins, acrylic compounds, vinyl compounds and aramides.

On précisera ici que les fibres discontinues peuvent être pleines ou creuses et avoir une section quelconque, leur section pouvant par exemple être ronde, elliptique, triangulaire, carrée, rectangulaire ou à plusieurs lobes.It will be specified here that the staple fibers can be full or hollow and have any cross-section, their cross-section possibly for example being round, elliptical, triangular, square, rectangular or with several lobes.

Lors de la mise en oeuvre du procédé selon l'invention, il convient de réaliser les étapes d'intersecting et d'étirage-tordage avant l'étape d'imprégnation qui peut être réalisée en immergeant le fil dans un bac contenant la résine à l'état liquide.When implementing the method according to the invention, the intersecting and stretch-twisting steps should be carried out before the impregnation step which can be carried out by immersing the wire in a tank containing the resin to be liquid state.

Il est par ailleurs souhaitable de faire réticuler complètement la résine d'imprégnation avant d'enduire le fil, la réticulation étant réalisée alors que le fil est mis en tension.It is also desirable to completely crosslink the impregnation resin before coating the wire, the crosslinking being carried out while the wire is under tension.

La réticulation réalisée sous tension permet d'obtenir une bonne liaison entre la résine et les fibres et par suite une corde présentant une meilleure résistance à la traction.The crosslinking carried out under tension makes it possible to obtain a good bond between the resin and the fibers and consequently a cord having a better tensile strength.

Conformément à l'invention, la résine d'imprégnation et la matière synthétique constituant la gaine peuvent être de même nature et consister en un matériau choisi dans le groupe comprenant les polyesters, les polyéthers, les polyamides, les époxydes, les polyuréthanes, les cyanoacrylates, les composés acryliques, les composés vinyliques et les composés phénoliques, ces différents matériaux pouvant être associés à des solvants et éventuellement à des colorants.According to the invention, the impregnation resin and the synthetic material constituting the sheath may be of the same nature and consist of a material chosen from the group comprising polyesters, polyethers, polyamides, epoxides, polyurethanes, cyanoacrylates , acrylic compounds, vinyl compounds and phenolic compounds, these various materials can be combined with solvents and optionally with dyes.

Selon une autre caractéristique du procédé conforme à l'invention, on peut avantageusement polir le fil imprégné avant de l'enduire avec la matière synthétique, ce polissage pouvant par exemple être réalisé en faisant passer le fil entre des disques abrasifs souples.According to another characteristic of the process in accordance with the invention, it is advantageous to polish the impregnated wire before coating it with the synthetic material, this polishing can for example be carried out by passing the wire between flexible abrasive discs.

Selon encore une autre caractéristique du procédé conforme à l'invention, on peut faire réticuler la résine d'imprégnation en chauffant le fil dans un four dont la température est réglée pour éviter une détérioration des fibres discontinues.According to yet another characteristic of the process according to the invention, the impregnation resin can be crosslinked by heating the yarn in an oven whose temperature is adjusted to avoid deterioration of the staple fibers.

A titre d'exemple, on précisera que l'on fait circuler le fil imprégné dans le four de façon à ce qu'il séjourne dans ce dernier pendant une durée de l'ordre de 10 secondes à 10 minutes, de préférence de 30 secondes à 3 minutes.For example, it will be specified that the impregnated wire is circulated in the oven so that it remains in the latter for a period of the order of 10 seconds to 10 minutes, preferably 30 seconds. 3 minutes.

Pour obtenir une corde de diamètre constant, on peut avantageusement ajuster l'épaisseur de la gaine en faisant passer le fil enduit dans une série de fillères de diamètres décroissants. A l'issue de cette opération de calibrage, l'épaisseur de la gaine peut être de l'ordre de 0,05 à 0,5 mm.To obtain a cord of constant diameter, the thickness of the sheath can advantageously be adjusted by passing the coated wire through a series of fillers of decreasing diameters. At the end of this calibration operation, the thickness of the sheath can be of the order of 0.05 to 0.5 mm.

Bien entendu, la présente invention concerne également les cordes obtenues par la mise en oeuvre du procédé décrit ci-dessus, ces cordes étant destinées à être utilisées dans des applications dans lesquelles elles sont susceptibles de subir des tractions, comme par exemple sur des raquettes ou des instruments de musique.Of course, the present invention also relates to the strings obtained by the implementation of the method described above, these strings being intended to be used in applications in which they are liable to undergo traction, such as for example on rackets or musical instruments.

Claims (15)

Procédé de fabrication de cordes destinées à être soumises à des tractions, notamment de cordes pour raquettes et instruments de musique, comprenant une étape dans laquelle on réalise un fil à partir de fibres, une étape dans laquelle on imprègne le fil avec une résine, une étape dans laquelle on enduit le fil imprégné avec une matière synthétique pour le munir d'une gaine, une étape dans laquelle on fait réticuler complètement la matière synthétique, et une étape dans laquelle on ajuste l'épaisseur de la gaine, caractérisé en ce que pour réaliser le fil, on utilise des fibres discontinues que l'on soumet à des opérations textiles d'intersecting et d'étirage-tordage.A method of manufacturing strings intended to be subjected to traction, in particular strings for rackets and musical instruments, comprising a step in which a thread is made from fibers, a step in which the thread is impregnated with a resin, a step in which the impregnated wire is coated with a synthetic material to provide it with a sheath, a step in which the synthetic material is completely crosslinked, and a step in which the thickness of the sheath is adjusted, characterized in that to make the yarn, staple fibers are used which are subjected to textile operations of intersecting and stretching-twisting. Procédé selon la revendication 1, caractérisé en ce que les fibres discontinues ont une longueur de l'ordre de 20 à 500 mm, de préférence de 50 à 250 mm.Process according to claim 1, characterized in that the staple fibers have a length of the order of 20 to 500 mm, preferably from 50 to 250 mm. Procédé selon la revendication 1 ou 2, caractérisé en ce que les fibres discontinues titrent de l'ordre de 1 à 100 dtex, de préférence de 1 à 20 dtex.Method according to claim 1 or 2, characterized in that the staple fibers titrate on the order of 1 to 100 dtex, preferably from 1 to 20 dtex. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les fibres discontinues présentent une frisure de l'ordre de 4 à 12 par centimètre.Process according to any one of Claims 1 to 3, characterized in that the staple fibers have a crimp of the order of 4 to 12 per centimeter. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que les fibres discontinues sont réalisées en au moins un matériau choisi dans le groupe comprenant les fibres textiles naturelles, le carbone, le verre, les métalloïdes, les métaux, les alliages métalliques, les polyesters, les polyéthers, les polyuréthanes, les polyamides, les polyoléfines, les composés acryliques, les composés vinyliques et les aramides.Process according to any one of Claims 1 to 4, characterized in that the staple fibers are produced from at least one material chosen from the group comprising natural textile fibers, carbon, glass, metalloids, metals, alloys metallic, polyesters, polyethers, polyurethanes, polyamides, polyolefins, acrylic compounds, vinyl compounds and aramides. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'on réalise les étapes d'intersecting et d'étirage-tordage avant l'étape d'imprégnation.Method according to any one of Claims 1 to 5, characterized in that the intersecting and stretch-twisting steps are carried out before the impregnation step. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'on fait réticuler complètement la résine d'imprégnation avant d'enduire le fil, la réticulation étant réalisée alors que le fil est mis en tension.Process according to any one of Claims 1 to 6, characterized in that the impregnating resin is completely crosslinked before coating the wire, the crosslinking being carried out while the thread is under tension. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce que la résine d'imprégnation et la matière synthétique sont de même nature.Process according to any one of Claims 1 to 7, characterized in that the impregnating resin and the synthetic material are of the same nature. Procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce que la résine d'imprégnation et la matière synthétique constituant la gaine sont réalisées en un matériau choisi dans le groupe comprenant les polyesters, les polyéthers, les polyamides, les époxydes, les polyuréthanes, les cyanoacrylates, les composés acryliques, les composés vinyliques et les composés phénoliques, ces différents matériaux pouvant être associés à des solvants et éventuellement à des colorants.Process according to any one of Claims 1 to 8, characterized in that the impregnation resin and the synthetic material constituting the sheath are made of a material chosen from the group comprising polyesters, polyethers, polyamides, epoxides, polyurethanes, cyanoacrylates, acrylic compounds, vinyl compounds and phenolic compounds, these various materials can be combined with solvents and optionally with dyes. Procédé selon l'une quelconque des revendications 1 à 9, caractérisé en ce que l'on polit le fil imprégné avant de l'enduire avec la matière synthétique.Method according to any one of Claims 1 to 9, characterized in that the impregnated wire is polished before coating it with the synthetic material. Procédé selon l'une quelconque des revendications 1 à 10, caractérisé en ce qu'on fait réticuler la résine d'imprégnation en chauffant le fil dans un four dont la température est réglée pour éviter un retrait des fibres discontinues.Process according to any one of Claims 1 to 10, characterized in that the impregnation resin is crosslinked by heating the wire in an oven whose temperature is adjusted to avoid withdrawal of the staple fibers. Procédé selon la revendication 11, caractérisé en ce qu'on fait circuler le fil imprégné dans le four de façon à ce qu'il séjourne dans ce dernier pendant une durée de l'ordre de 10 secondes à 10 minutes, de préférence de 30 secondes à 3 minutes.Process according to Claim 11, characterized in that the impregnated wire is made to circulate in the oven so that it remains in the latter for a period of the order of 10 seconds to 10 minutes, preferably 30 seconds. 3 minutes. Procédé selon l'une quelconque des revendications 1 à 12, caractérisé en ce qu'on ajuste l'épaisseur de la gaine en faisant passer le fil enduit dans une série de filières de diamètres décroissants.Process according to any one of Claims 1 to 12, characterized in that the thickness of the sheath is adjusted by passing the coated wire through a series of dies of decreasing diameters. Procédé selon l'une quelconque des revendications 1 à 13, caractérisé en ce que la gaine a une épaisseur de l'ordre de 0,05 à 0,5 mm.Method according to any one of Claims 1 to 13, characterized in that the sheath has a thickness of the order of 0.05 to 0.5 mm. A titre de produit industriel nouveau, une corde obtenue conformément au procédé de fabrication selon l'une quelconque des revendications 1 à 14.As a new industrial product, a cord obtained in accordance with the manufacturing process according to any one of claims 1 to 14.
EP91403179A 1990-11-26 1991-11-25 Fabrication process for cords intended for tensile load, particularly for strings of tennis rackets and musical instruments, and strings thus obtained Expired - Lifetime EP0488873B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9014754 1990-11-26
FR909014754A FR2669647B1 (en) 1990-11-26 1990-11-26 METHOD OF MANUFACTURING STRINGS FOR SUBJECTING TO TRACTIONS, ESPECIALLY STRINGS FOR RACKETS AND MUSICAL INSTRUMENTS, AND STRINGS OBTAINED THEREBY.

Publications (2)

Publication Number Publication Date
EP0488873A1 true EP0488873A1 (en) 1992-06-03
EP0488873B1 EP0488873B1 (en) 1995-08-23

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EP91403179A Expired - Lifetime EP0488873B1 (en) 1990-11-26 1991-11-25 Fabrication process for cords intended for tensile load, particularly for strings of tennis rackets and musical instruments, and strings thus obtained

Country Status (6)

Country Link
US (1) US5376412A (en)
EP (1) EP0488873B1 (en)
JP (1) JPH04300334A (en)
AT (1) ATE126839T1 (en)
DE (1) DE69112359D1 (en)
FR (1) FR2669647B1 (en)

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Publication number Priority date Publication date Assignee Title
FR2772395A1 (en) * 1997-12-17 1999-06-18 Cousin Biotech Cord e.g. tennis cord
EP2853625A4 (en) * 2012-05-21 2016-03-30 Lg Hausys Ltd Lint-preventing yarn and woven floor decoration material using same

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US5514417A (en) * 1994-08-04 1996-05-07 Schuller International, Inc. Method of and apparatus for coating a molded fibrous workpiece
US5883319A (en) * 1995-11-22 1999-03-16 W.L. Gore & Associates, Inc. Strings for musical instruments
FR2839001A1 (en) * 2002-04-25 2003-10-31 Joel Patrick Jean Luc Breard PROCESS FOR THE MANUFACTURE OF A NEW MATERIAL COMPRISING BEAMS OF NATURAL FIBERS PRE-IMPREGNATED WITH ORGANIC RESIN AND IN THE FORM OF YARN OR RIBBON
DE102011057150B4 (en) * 2011-12-29 2024-03-07 Saati Deutschland Gmbh Thread and fabric for insect screens, insect screens and process for producing fabrics for insect screens

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DE3002405A1 (en) * 1978-11-06 1981-07-30 Amsted Industries, Inc., Chicago, Ill. PLASTIC-IMPREGNATED, LUBRICATED ARAMID FIBER ROPE
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2772395A1 (en) * 1997-12-17 1999-06-18 Cousin Biotech Cord e.g. tennis cord
EP2853625A4 (en) * 2012-05-21 2016-03-30 Lg Hausys Ltd Lint-preventing yarn and woven floor decoration material using same

Also Published As

Publication number Publication date
JPH04300334A (en) 1992-10-23
FR2669647B1 (en) 1994-10-14
US5376412A (en) 1994-12-27
FR2669647A1 (en) 1992-05-29
EP0488873B1 (en) 1995-08-23
ATE126839T1 (en) 1995-09-15
DE69112359D1 (en) 1995-09-28

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