EP3054040B1 - Fil pour vêtement de protection, methode de fabrication , vêtement ou tissu - Google Patents

Fil pour vêtement de protection, methode de fabrication , vêtement ou tissu Download PDF

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Publication number
EP3054040B1
EP3054040B1 EP15202817.1A EP15202817A EP3054040B1 EP 3054040 B1 EP3054040 B1 EP 3054040B1 EP 15202817 A EP15202817 A EP 15202817A EP 3054040 B1 EP3054040 B1 EP 3054040B1
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Prior art keywords
yarn
covering
fluoro
filament
polymer layer
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EP15202817.1A
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German (de)
English (en)
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EP3054040A1 (fr
Inventor
Sergio Carrara
Giuliano Gandossi
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Filtes International Srl Con Socio Unico
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Filtes International Srl Con Socio Unico
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    • 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
    • D02G3/442—Cut or abrasion resistant 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
    • D02G3/36—Cored or coated yarns or threads
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D10B2321/04—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of halogenated hydrocarbons
    • D10B2321/042—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of halogenated hydrocarbons polymers of fluorinated hydrocarbons, e.g. polytetrafluoroethene [PTFE]

Definitions

  • This invention relates to a yarn for protective fabrics, i.e. a yarn having high mechanical properties and wear resistance, a fabric or garment made with such yarn, and a method for the production of a yarn.
  • document US 4,777,789 discloses a yarn made from an inner core formed from a filament, to which an internal wire is superposed, for example stainless steel.
  • the core and internal wire are covered by a first wire wound in a first winding direction that forms a first covering layer; the first covering layer is covered by a second wire wound in a second winding direction that forms a second covering layer.
  • the yarns thus constructed are extremely delicate in the inevitable washing operations because the wound wires tend to slide along the respective core and, in some types of internal cores, the latter tend to break subsequently making the garment unusable.
  • the purpose of this invention is to provide a new type of yarn having high characteristics of mechanical stability and comfort, and further with a useful life longer than that of traditional yarns, even after numerous washings.
  • reference numbers 1, 2, 4 and 6 identify a yarn in its entirety.
  • the aforesaid yarn has been specifically designed for the production of protective fabrics or garments, in particular gloves.
  • Such yarn comprises a core 8 and a first covering 14 of the core 8.
  • the core 8 comprises at least one discontinuous or continuous filament 10, which extends along a filament axis X and which is at least partially coated (for example completely covered) with a fluoro-polymer layer 12.
  • the filament 10 comprises a continuous filament.
  • the filament 10 comprises at least a glass, steel and/or ceramic filament.
  • the variant comprising glass is particularly advantageous.
  • the filament 10 could comprise a filament of ultra high molecular weight polyethylene or an aramid filament.
  • filaments constituted by any of the materials known under the trade names of Dyneema®, Kevlar® or Technora® can be used.
  • the filament 10 has a linear density in the range of 22-2200 dtex, preferably 40-1600 dtex, still more preferably 40-680 dtex.
  • the core 8 comprises 2-1800 filaments (optionally continuous filaments), preferably of a diameter between 5-15 micrometres.
  • the core 8 could comprise 2-500 or 210-300 filaments, with a diameter of about 5-6 micrometres.
  • the core 8 comprises a single filament or at least a pair of filaments, for example arranged side by side or parallel to each other.
  • these filaments could be coated by a single fluoro-polymer layer, or each filament could be separately coated with such a layer.
  • the fluoro-polymer layer 12 comprises PTFE or consists of PTFE.
  • the first covering 14 is obtained by winding at least a first yarn 16 or a first sliver 18, 18' in a first winding direction, so as to achieve a closed coiling.
  • first yarn 16 or first sliver 18, 18' is incorporated in the fluoro-polymer layer 12 in order to anchor the first covering 14 to said filament 10.
  • the fluoro-polymer layer in addition to - chemically and physically - protecting the filament that it at least partially covers, serves to promote the adhesion of the first covering 14 to the core 8.
  • the first yarn 16 has a linear density in the range of 22-2200 dtex, preferably 40-1600 dtex, still more preferably 40-680 dtex.
  • the fluoro-polymer layer 12 defines one or more retention seats which extend in a spiral around the filament axis X, to prevent longitudinal sliding of the first covering 14.
  • the transversal cross-section (or diameter) of the filament 10 and the thickness of the fluoro-polymer layer 12 are mutually selected so that the weight of the fluoro-polymer is equal to or smaller than 20% of filament, for example about 1-20 wt%.
  • the yarn 6 could comprise a pair of first slivers inserted in as many spiral retention seats delimited by the fluoro-polymer layer 12.
  • each of them comprises a plurality of discontinuous fibres 20 anchored to the fluoro-polymer layer 12.
  • the yarn comprises a second covering 22 superposed on the first covering 14, obtained by winding at least a second yarn 24 in a second winding direction, opposite the first winding direction, so as to achieve a closed coiling ( Figure 1 ) or an open coiling (variant not shown).
  • the second yarn 24 could have a linear density in the range of 22-2200 dtex, preferably 40-1600 dtex, still more preferably 40-680 dtex.
  • the first yarn 16 is wound with an "S"-type winding, while the second yarn 24 is wound with a "Z"-type winding.
  • the schematic diagram of Figure 1 shows a closed coiling wherein, advantageously, a first number of windings per linear metre of the first yarn 16 and a second number of windings per linear metre of the second yarn 24 could be substantially corresponding, at least as an order of magnitude.
  • the yarn 1 with the second covering 22 realised as a closed coiling can be used in the production steps of the yarns shown in Figures 2 and 3 .
  • the yarn could comprise at least a third yarn wound around the second covering along the filament axis X, wound as an open coiling.
  • the third yarn comprises a yarn of high tenacity, i.e. a tenacity of between 40 and 120 cN/tex, preferably about 70 cN/tex.
  • the yarn could comprise at least a third covering 26, which is superposed on the second covering 22 and comprising a pair of slivers 40, 40' or yarns 42, 42' that form a closed tubular coating on the second covering 22.
  • the third covering 26 is obtained by a winding of slivers 40, 40' comprising discontinuous fibres 44.
  • the pair of slivers 40, 40' or yarns 42, 42' is wound with an "S"-type winding.
  • the realisation of the third covering is performed in the same winding direction as the second yarn, placing these fibres at least in the interspaces of the underlying open coiling (when present).
  • the realisation of the third covering involves two concomitant effects, i.e. a distancing of the coils of the first covering and a reduction in the interspaces of the open coiling to receive and hold the aforesaid discontinuous fibres.
  • first and second yarn are respectively wound with a first NW1 and a second NW2 number of windings per linear metre, where the sliver has a third number of windings per linear metre NW3 such that the relationship applies: 0.90 ⁇ NW 1 ⁇ NW 3 / NW 2 + NW 3 ⁇ 1.10
  • the first yarn, the second yarn, the sliver and/or the third yarn may be independently selected from the group consisting of polyethylene, polyamide, polyester, (para-)aramide, ultra high molecular weight polyethylene and mixtures thereof.
  • the first yarn, the second yarn, the sliver and/or the third yarn may be independently selected from natural fibres (for example cotton, wool) and mixtures thereof, optionally mixed with the synthetic fibres or with the filaments illustrated above.
  • This invention further relates to a fabric or garment comprising a yarn 1, 2, 4, 6 according to any of the preceding embodiments, or obtained through a variant of the method illustrated below.
  • this invention relates to a method for the production of a yarn, preferably for protective fabrics or garments.
  • this method can be used for the manufacture of the yarn described previously, even if this is not expressly indicated, this method may comprise any manufacturing step deducible - even implicitly - from the structure of the aforesaid yarn 1, 2, 4, 6.
  • This method comprises the steps of:
  • step iii) the winding tension applied to the first yarn 16 or to the first sliver 18, 18' is related to the wetness of the fluoro-polymer layer 12 to obtain a desired incorporation of the yarn or of the sliver, wherein - preferably - at least three quarters of the cross-section of the latter protrudes from the fluoro-polymer layer 12.
  • the winding tension must be low enough as not to tear it during winding around the core.
  • step iv) comprises a cross-linking of the fluoro-polymer performed via sub-steps of heating and microwave irradiation to prevent yellowing of the glass filament (where provided).
  • step iv) may, in any case, comprise the cross-linking of the fluoro-polymer via the sub-steps discussed above, since this variant allows combining a satisfactory cross-linking of the polymer layer with an optimal adhesion of the first covering.
  • the yarn, fabric/garment and the method of this invention overcome the drawbacks noted in relation to the prior art.
  • the yarn of this invention shows a high stability, a remarkable workability in weaving the garments and significant wearing comfort for the user.
  • the yarn and the fabric/garment of this invention can be subjected to an indefinite number of washings, since the filament does not run any risk of tearing or crack as a result of these operations.
  • the first covering undergoes a considerable adhesion effect with respect to the filament, so as to prevent the unravelling of the yarn during use or during washing.
  • the aforesaid yarn can also be used in chemically corrosive environments.
  • the method of this invention allows maintaining intact the properties of the internal core.

Claims (15)

  1. Fil (1, 2, 4, 6), comprenant :
    - un coeur (8) qui comprend au moins un filament discontinu ou continu (10) qui s'étend le long d'un axe de filament (X), et qui est au moins partiellement revêtu par une couche de polymère fluoré (12), par exemple une couche de polytétrafluoroéthylène ;
    - un premier revêtement (14) du coeur (8), obtenu par enroulement d'au moins un premier fil (16) ou un premier brin (18, 18') dans une première direction d'enroulement, de façon à réaliser un enroulement à spires jointives ;
    ledit fil étant caractérisé en ce qu'au moins une partie dudit premier fil (16) ou dudit premier brin (18, 18') est incorporée dans la couche de polymère fluoré (12) de façon à ancrer le premier revêtement (14) sur ledit filament (10).
  2. Fil selon la revendication 1, dans lequel la couche de polymère fluoré (12) définit un ou plusieurs sièges de rétention qui s'étendent selon une spirale autour de l'axe de filament (X), de façon à empêcher un glissement longitudinal du premier revêtement (14).
  3. Fil selon l'une quelconque des revendications précédentes, dans lequel la couche de polymère fluoré (12) recouvre complètement le filament (10), et dans lequel la section transversale ou le diamètre du filament (10) et l'épaisseur de la couche de polymère fluoré (12) sont mutuellement sélectionnées de telle sorte que le poids du polymère fluoré soit inférieur ou égal à 20% dudit filament, par exemple d'environ 1 à 20% en poids.
  4. Fil selon l'une quelconque des revendications précédentes, comprenant une paire de premiers brins (18, 18') insérés dans autant de sièges de rétention en spirale (12) délimités par la couche de polymère fluoré (12), chaque brin (18, 18') comprenant une pluralité de fibres discontinues (20) ancrées sur la couche de polymère fluoré (12).
  5. Fil selon l'une quelconque des revendications précédentes, dans lequel le coeur (8) comprend de 2 à 1800 filaments, continus de façon optionnelle, d'un diamètre compris entre 5 et 15 micromètres, lesdits filaments étant revêtus par une couche de polymère fluoré unique (12).
  6. Fil selon l'une quelconque des revendications précédentes, comprenant un deuxième revêtement (22) superposé sur le premier revêtement (14), obtenu par enroulement d'au moins un deuxième fil (24) dans une deuxième direction d'enroulement, opposée à la première direction d'enroulement, de façon à obtenir un enroulement à spires jointives ou à spires non-jointives.
  7. Fil selon la revendication précédente, dans lequel les spires de l'enroulement du deuxième revêtement sont non-jointives, et comprenant au moins un troisième revêtement, réalisé par l'enroulement d'au moins un brin comprenant des fibres discontinues dans la même direction d'enroulement que le deuxième fil, et la disposition desdites fibres au moins dans les espaces interstitiels dudit enroulement à spires non-jointives, la réalisation du troisième revêtement mettant en oeuvre une mise à distance des spires du premier revêtement et une réduction dans les espaces interstitiels de l'enroulement à spires non-jointives de façon à recevoir et à maintenir lesdites fibres.
  8. Fil selon la revendication précédente, dans lequel le premier (16) et le deuxième (24) fils sont respectivement enroulés avec un premier (NW1) et un deuxième (NW2) nombres d'enroulements par mètre linéaire, et dans lequel le brin comporte un troisième nombre d'enroulements par mètre linéaire (NW3), de telle sorte que la relation suivante s'applique : 0 , 90 ≤ NW 1 − NW 3 / NW 2 + NW 3 ≤ 1 , 10.
    Figure imgb0004
  9. Fil selon la revendication 6, comprenant un troisième revêtement (26) superposé sur le deuxième revêtement (22), ledit troisième revêtement comprenant une paire de brins (40, 40') ou de fils (42, 42') formant un revêtement tubulaire fermé sur le deuxième revêtement (22).
  10. Fil selon la revendication 6, dans lequel les spires de l'enroulement du deuxième revêtement sont jointives, et comprenant au moins un troisième fil enroulé autour du deuxième revêtement le long de l'axe de filament (X), enroulé avec un enroulement à spires non-jointives.
  11. Fil selon la revendication précédente, dans lequel le troisième fil a une ténacité comprise entre 40 et 120 cN/tex, de préférence, d'environ 70 cN/tex.
  12. Textile ou vêtement comprenant un fil (1, 2, 4, 6) selon l'une quelconque des revendications précédentes.
  13. Procédé de réalisation d'un fil (1, 2, 4, 6) comprenant les étapes consistant à :
    i) disposer au moins un filament discontinu ou continu (10) qui s'étend le long d'un axe de filament (X) ;
    ledit procédé étant caractérisé en ce qu'il comprend les étapes consistant à :
    ii) revêtir le filament (10) avec une couche de polymère fluoré (12) par immersion d'au moins une partie du filament dans un bain de polymère fluoré liquide, de façon à produire ainsi un coeur (8) dudit fil (1, 2, 4, 6) ;
    iii) lorsque la couche de polymère fluoré (12) est encore humide, enrouler au moins un premier fil (16) ou un premier brin (18, 18') dans une première direction d'enroulement de façon à réaliser un enroulement à spires jointives, de façon à obtenir un premier revêtement (14) du filament (10) ;
    dans lequel, durant l'étape iii), au moins une partie dudit premier fil (16) ou du premier brin (18, 18') pénètre dans la couche de polymère fluoré (12), restant incorporée à l'intérieur de celle-ci ;
    iv) solidifier la couche de polymère fluoré (12) de façon à ancrer le premier revêtement (14) sur ledit filament (10).
  14. Procédé selon la revendication précédente, dans lequel, dans l'étape iii), la tension d'enroulement appliquée au premier fil (16) ou au premier brin (18, 18') est associée à l'humidité de la couche de polymère fluoré (12) de façon à obtenir une incorporation désirée du fil ou du brin, au moins trois quarts de la section transversale de ce dernier faisant saillie à partir de la couche de polymère fluoré (12).
  15. Procédé selon les revendications 13 ou 14, dans lequel au moins un filament (10) est fait en verre, et dans lequel l'étape iv) comprend une réticulation du polymère fluoré, effectuée par l'intermédiaire de sous-étapes de chauffage et d'irradiation par des micro-ondes afin d'éviter un jaunissement dudit filament de verre.
EP15202817.1A 2015-02-09 2015-12-28 Fil pour vêtement de protection, methode de fabrication , vêtement ou tissu Active EP3054040B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15202817T PL3054040T3 (pl) 2015-02-09 2015-12-28 Przędza do odzieży ochronnej, sposób jej produkcji, odzież lub tkanina

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITBS20150019 2015-02-09

Publications (2)

Publication Number Publication Date
EP3054040A1 EP3054040A1 (fr) 2016-08-10
EP3054040B1 true EP3054040B1 (fr) 2017-10-18

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EP15202817.1A Active EP3054040B1 (fr) 2015-02-09 2015-12-28 Fil pour vêtement de protection, methode de fabrication , vêtement ou tissu

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EP (1) EP3054040B1 (fr)
ES (1) ES2656206T3 (fr)
PL (1) PL3054040T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106400240A (zh) * 2016-09-22 2017-02-15 江南大学 一种双层包缠纱及其生产方法
CN107503017A (zh) * 2017-09-15 2017-12-22 中原工学院 一种舒适护肤保健性平行纺包缠柔软纱及其制备方法
CN112941689B (zh) * 2020-08-17 2022-09-23 赛立特(南通)安全用品有限公司 一种复合纱线及其加工设备

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4777789A (en) 1986-10-03 1988-10-18 Kolmes Nathaniel H Wire wrapped yarn for protective garments
JPH01139835A (ja) * 1987-11-27 1989-06-01 Showa Kogyo Kk 芯鞘構造糸
FR2828894B1 (fr) * 2001-08-24 2004-01-02 Schappe Sa Fil resistant a la coupure, destine notamment a la realisation de vetements de protection
US7401460B2 (en) * 2004-08-13 2008-07-22 Klaus Bloch Textile thread having a polytetrafluoroethylene wrapped core
ITBS20120098A1 (it) * 2012-06-29 2013-12-30 Filtes Internat S R L Filato per indumenti di protezione, metodo per la sua realizzazione,indumento o tessuto

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ES2656206T3 (es) 2018-02-26
PL3054040T3 (pl) 2018-04-30
EP3054040A1 (fr) 2016-08-10

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