EP4033928B1 - Method for manufacturing a protective glove provided with a tearable joint and such a glove - Google Patents

Description

The invention relates to a method of manufacturing a protective glove, as well as a protective glove produced by means of such a method.

It applies in particular to protective gloves intended to be worn in an industrial environment, in particular during the use of machines comprising a rotating tool.

Protective gloves comprising a textile support arranged to cover the fingers and at least the proximal part of the hand of a wearer are known. The textile support can in particular be formed by seamless knitting, which allows it, in addition to being easy to manufacture, to conform easily to the hand of the wearer, and thus to guarantee said wearer good comfort in use.

Such gloves also have a polymer coating, in particular based on polyurethane or nitrile rubber, which extends over at least part of the outer surface, in particular the palmar zone of the textile support, in order to protect the hand against the risks cut by a sharp tool.

• la fabrication d'un support textile tel que décrit précédemment ;
• l'application d'une solution de revêtement polymère sur au moins une partie du support textile, notamment la zone palmaire ;
• le traitement dudit support textile pour que ladite solution forme un revêtement polymère sur la surface extérieure de la partie concernée.

To manufacture such a glove, a process is known which provides:

• the manufacture of a textile support as described previously;
• the application of a polymer coating solution on at least a part of the textile support, in particular the palmar zone;
• treating said textile support so that said solution forms a polymeric coating on the outer surface of the part concerned.

To allow the wearer to easily release his hand in the event of his glove getting caught in a rotating tool, it is known to form a junction between a portion and the rest of said glove, said junction being arranged to be able to tear under the effect of a threshold tearing force of said portion.

Such junctions can in particular be formed on a finger covering sleeve, and more particularly at the base of such a sleeve, in order to prevent said finger from being drawn into a machine, and thus avoid a serious accident for the wearer.

• réaliser le support textile avec au moins un premier fil textile, et de former une zone de jonction entre une portion et le reste dudit support au moyen d'un deuxième fil textile dont la résistance à la déchirure est plus faible que celle dudit premier fil ;
• appliquer une solution de revêtement polymère au moins sur ladite zone de jonction, de sorte à former une jonction déchirable comprenant le deuxième fil et ledit revêtement.

To form such a junction, the document US-9 072 326 plans to:

• making the textile support with at least a first textile yarn, and forming a junction zone between a portion and the rest of said support by means of a second textile yarn whose tear resistance is lower than that of said first yarn;
• applying a polymeric coating solution at least to said joint area, so as to form a tearable joint comprising the second wire and said coating.

However, this solution is not entirely satisfactory, in that the junction has a tear resistance which remains particularly high. KR101713763 discloses a method according to the preamble of claim 1.

The invention aims to improve the prior art by proposing in particular a glove in which are formed junctions with a sufficiently low tearing resistance to guarantee the safety of the wearer in the event of snagging of said glove in a rotating tool.

• la réalisation d'un support textile agencé pour recouvrir les doigts et au moins la partie proximale de la main d'un porteur, ledit support textile présentant au moins une zone de jonction d'une portion dudit support avec le reste dudit support ;
• l'application d'une solution de revêtement polymère sur au moins une partie du support textile intégrant la zone de jonction ;
• le traitement dudit support textile pour que ladite solution forme un revêtement polymère sur la surface extérieure d'au moins la zone de jonction ;

ledit procédé prévoyant un traitement de la zone de jonction revêtue qui est agencé pour assurer une destruction totale du support textile sur ladite zone afin de former une jonction entre la portion et le reste du support qui est formée du revêtement polymère, ladite jonction étant agencée pour pouvoir se déchirer sous l'effet d'un effort seuil d'arrachement de ladite portion.To this end, according to a first aspect, the invention proposes a method for manufacturing a protective glove, said method providing:

• the production of a textile support arranged to cover the fingers and at least the proximal part of the hand of a wearer, said textile support having at least one junction zone of a portion of said support with the rest of said support;
• the application of a polymer coating solution on at least a part of the textile support integrating the junction zone;
• treating said textile support so that said solution forms a polymeric coating on the outer surface of at least the junction zone;

said method providing for a treatment of the coated junction zone which is arranged to ensure total destruction of the textile support on said zone in order to form a junction between the portion and the rest of the support which is formed of the polymer coating, said junction being arranged to to be able to tear under the effect of a threshold tearing force of said portion.

According to a second aspect, the invention proposes a protective glove manufactured by means of such a process, said glove comprising a textile support arranged to cover the fingers and at least the proximal part of the hand of a wearer, the outer surface said textile backing being provided with a polymer coating at least at the level of the junction between a portion of said backing and the rest of said backing, said junction being formed of the sole polymer coating which is arranged to be able to tear under the effect of a tearing threshold force of said portion.

• [Fig.1] représente schématiquement un support textile d'un gant selon un mode de réalisation de l'invention,
• [Fig.1a] représentant un agrandissement d'un manchon de recouvrement d'un doigt pourvu d'une zone de jonction ;
• [Fig.2a],
• [Fig.2b],
• [Fig.2c],
• [Fig.2d],
• [Fig.2e],
• [Fig.2f] et
• [Fig.2g] représentent des étapes successives d'un procédé de réalisation d'un gant selon un mode de réalisation de l'invention, notamment à partir du support textile des figures 1 et 1a ;
• [Fig.3a] représente un agrandissement montrant une zone de jonction d'un gant selon l'invention avant le traitement de destruction du support textile ;
• [Fig.3b] représente, en vue intérieure du gant, la jonction déchirable obtenue après le traitement de destruction du support textile.

Other particularities and advantages of the invention will appear in the following description, made with reference to the appended figures, in which:

• [ Fig.1 ] schematically represents a textile support for a glove according to one embodiment of the invention,
• [ Fig.1a ] showing an enlargement of a sleeve for covering a finger provided with a junction zone;
• [ Fig.2a ],
• [ Fig.2b ],
• [ Fig.2c ],
• [ Fig.2d ],
• [ Fig.2e ],
• [ Fig.2f ] And
• [ Fig.2g ] represent successive steps of a method for producing a glove according to one embodiment of the invention, in particular from the textile support of the figures 1 and 1a ;
• [ Fig.3a ] represents an enlargement showing a junction zone of a glove according to the invention before the treatment for destroying the textile support;
• [ Fig.3b ] shows, in an inside view of the glove, the tearable junction obtained after the treatment for destroying the textile support.

In relation to these figures, a method for manufacturing a protective glove 1 is described below, as well as a protective glove 1 manufactured by means of such a method.

The method provides for the production of a textile support 2 arranged to cover the fingers and at least the proximal part of the wearer's hand.

In the embodiment shown, the textile support 2 comprises five sleeves 3, 3a for covering respectively a finger of the wearer, a central portion 4 covering the proximal part of the hand, and a portion 5 covering the wrist of the wearer. wearer, said wrist portion being provided with an opening through which the wearer can put on the glove 1.

The method may provide for making the textile support 2 by knitting, which allows the glove 1 to conform easily to the hand of the wearer, and thus to guarantee said wearer good comfort in use.

The textile support 2 is made with at least one structural thread 6 composed of natural and/or synthetic fibers, in particular based on polyamide, polyester, acrylic, viscose, cotton, wool, linen, hemp and/or bamboo.

Advantageously, the structural yarn 6 comprises fibers which have a high resistance to cutting, which makes it possible to guarantee the wearer of the glove 1 good protection against the risk of being cut by a cutting tool.

• polyéthylène haute ténacité (HPPE, pour l'anglais High Performance Poly Ethylene), notamment commercialisées sous les marques Dyneema^®, Spectra^® ou Tsunooga^® ;
• polyaramide, notamment commercialisées sous les marques Kevlar^® ou Twaron^® ;
• polymère à cristaux liquides, notamment commercialisées sous la marque Vectran^® ;
• polyimide ;
• verre ;
• acier.

For this purpose, the structural yarn 6 may comprise, for example, fibers chosen from the following materials:

• high tenacity polyethylene (HPPE, for English High Performance Poly Ethylene), in particular marketed under the brands Dyneema ^® , Spectra ^® or Tsunooga ^® ;
• polyaramid, in particular marketed under the Kevlar ^® or Twaron ^® brand names;
• liquid crystal polymer, in particular marketed under the Vectran ^® brand;
• polyimide;
• glass ;
• steel.

The textile backing 2 has at least one area 7 for joining a portion 8 of said backing with the rest of said backing, the method providing for subsequently forming a tearable junction 9 at said area.

The method may provide for forming the junction zone 7 over 1 to 5 rows, in particular over 1 to 3 rows of knitting, which makes it possible to obtain a tearable junction 9 of sufficient width to guarantee a good tearing of the glove 1 in the event of hooking in a rotating tool.

Advantageously, the junction zone 7 is formed on at least one sleeve 3a covering a finger. Indeed, when using a rotary tool, the fingers constitute the part of the hand presenting the greatest risk of being caught by said tool. According to an advantageous embodiment, each of the sleeves 3a for covering a finger is provided with a junction zone 7.

On the figures 1 and 1a , the junction zone 7 is formed on the sleeve 3a covering the index finger, in particular between the proximal and intermediate phalanges, the end portion 8 of said sleeve thus being separable from the rest of the glove 1 in the event of catching in a rotary tool.

As a variant, the junction zone 7 can be formed, for example, at the base of a sleeve 3, 3a covering a finger, or even on the central part 4 covering the hand.

The method then provides for the application of a solution 10 of polymer coating 11 on at least part of the textile support 2 integrating the junction zone 7, in order in particular to preserve the integrity of the glove 1, protect it from oils and lengthen its lifetime.

The method may in particular provide for making the coating 11 from a polymer chosen from the following group: polyurethane, polyurea, natural latex, nitrile rubber, polychloroprene, fluoro-polymer, butyl latex, chlorosulfonated polyethylene (CSM), PVC, a combination of these compounds.

In particular in relation to a latex-based coating, the method may provide for applying a coagulant to at least part of said textile support integrating the junction zone 7, the polymer coating solution 10 then being applied to said coagulant.

In particular, the method may provide for applying the coagulant by soaking the textile support 2 in a bath 12 of coagulant solution, then drying said coagulant prior to the application of the polymer coating solution 10 .

In the embodiment shown, the textile support 2 is first threaded onto a base 13 in the shape of a hand, in particular made of metallic material ( figures 2a, 2b ), then dipped by means of said base in a bath 12 of coagulating solution, in particular based on calcium nitrate and water ( figure 2c ). Next, the textile support 2 / base 13 assembly is placed in an oven 14 at 60° C. to ensure the drying of the coagulant on said support ( 2d figure ).

Depending on the desired level of protection, the method may provide for applying the coating solution 10 to the entire textile support 2, to about 75% of the outer surface of said textile support, or only on the palmar area of said textile support.

Advantageously, the method can provide for applying the polymer coating solution 10 by soaking the textile support 2 in a bath 15 of said solution, which makes it possible to easily produce the coating 11 on the desired areas of the glove 1.

On the figure 2e , the textile support 2/base 13 assembly is placed in a bath 15 of polymer coating solution 10 so as to immerse the palmar area and the interdigital spaces of said support therein, in order to provide protection over a large surface area of the glove 1 .

The method then provides for the treatment of the textile support 2 so that the solution 10 forms a polymer coating 11 on the outer surface of at least the junction zone 7.

To form the polymer coating 11, the method may provide for applying a heat treatment, in particular to crosslink the polymer coating solution 10 . In particular, this crosslinking can be carried out at a temperature greater than or equal to 100°C.

In the embodiment shown, the textile support 2 / base 13 assembly, after soaking in the polymer coating solution 10, is rinsed with demineralized water, in particular to remove the excess solution 10 ( figure 2f ), then placed in an oven 16 at 100° C. to form the coating 11 by crosslinking of said polymer solution.

Finally, after complete cross-linking of the solution 10, the textile support 2 / coating 11 assembly obtained is removed from its base 13.

The method provides for a treatment of the coated junction zone 7 which is arranged to ensure total destruction of the textile support 2 on said zone, in order to form a junction 9 between portion 8 and the rest of said support which is formed of the polymer coating 11, said junction being arranged to be able to tear under the effect of a threshold tearing force of said portion.

Thus, as shown in the figures 3a and 3b , a protective glove 1 is obtained with a tearable seam 9 formed of the polymer coating 11 alone, which makes it possible to confer on said seam a sufficiently low tearing resistance to guarantee the tearing of the portion 8 in the event of snagging in a rotary tool.

To form the tearable junction 9, the method may provide for cutting the junction zone 7 over its entire thickness, in particular by laser cutting, or by water jet cutting.

The method can also provide for forming the tearable junction 9 by chemically eliminating the junction zone 7 over its entire thickness.

According to one embodiment, the method provides, during the production of the textile support 2, to produce the junction zone 7 with a degradable thread 17 instead of the structural thread 6 used for the rest of said support, then to apply subsequently a treatment of total degradation of said yarn to form the tearable junction 9.

To do this, the method may provide for making the junction zone 7 with a soluble thread 17, then applying a treatment for dissolving said thread with a view to its total elimination from said zone.

Advantageously, the method can provide for the elimination of the water-soluble yarn 17 during the rinsing treatment of the polymer coating 11 ( figure 2f ), which makes it possible to reduce the number of steps necessary for the manufacture of the glove 1, and thus to facilitate said manufacture. In particular, the rinsing treatment makes it possible to eliminate excess coagulation agent and surfactant from the polymer coating 11.

The method can provide for the use of a water-soluble polyvinyl alcohol thread 17, the dissolution of which is carried out at a temperature lower than or equal to the temperature of the rinsing bath of the polymer coating 11 and in a time equal to or lower than the duration rinse treatment.

In particular, the material constituting the soluble thread 17 may have a dissolution temperature of between 30° C. and 60° C., and in particular between 40° C. and 50° C. for a dissolution time of between 15 minutes and 120 minutes. , and in particular between 30 minutes and 60 minutes. The temperature of the rinsing bath will advantageously be adjusted according to the duration of the rinsing treatment.

According to another embodiment, the method provides for making the junction zone 7 with a heat-fusible wire 17, then applying a heat treatment to said zone to eliminate said wire.

Advantageously, the method can provide for eliminating the thermofusible yarn 17 during the heat treatment for crosslinking the polymer coating 11 ( figure 2g ), which makes it possible to reduce the number of steps necessary for the manufacture of the glove 1, and thus to facilitate said manufacture.

To do this, the method may provide for the use of a hot-melt wire 17 with a melting temperature less than or equal to the crosslinking temperature of the polymer coating 11. In particular, the material constituting the hot-melt wire 17 may have a melting temperature of between between 60°C and 100°C, and in particular between 60°C and 80°C.

By way of example, the thermofusible yarn 17 can be based on VLT yarn marketed under the ^Grilon® brand, said yarn having a melting temperature of the order of 60°C.

• une réduction de l'épaisseur du revêtement polymère 11a de la jonction 9 ; et/ou
• une altération du matériau dudit revêtement au niveau de ladite jonction.

The method can also provide for a treatment of the polymer 11a coating the junction zone 7 to reduce its mechanical resistance to tearing. This treatment may include:

• a reduction in the thickness of the polymer coating 11a of the junction 9; and or
• an alteration of the material of said coating at said junction.

According to one embodiment, the method may provide for treating the polymer coating 11a of the junction 9 together with the coated junction zone 7, in particular by cutting (laser or water jet) or chemical treatment, in order to produce in a single step the final 9 tear seam.

• retourner ledit gant de manière à présenter vers l'extérieur sa surface intérieure, et donc le support textile 2 ;
• enfiler ledit gant ainsi retourné sur un deuxième socle en forme de main ;
• réaliser la jonction déchirable 9 en traitant conjointement la zone textile 7 et le revêtement 11a la recouvrant.

To do this, the method can provide, after the step of forming the polymer coating 11 ( figure 2g ) and the demolding of the glove 1 from its metal base 13, of:

• turn said glove over so as to present its inner surface to the outside, and therefore the textile support 2;
• putting on said glove thus turned over on a second base in the shape of a hand;
• make the tearable junction 9 by jointly treating the textile zone 7 and the coating 11a covering it.

In the case of laser or water jet cutting, it is necessary to put the glove 1 on a two-dimensional support, in order to benefit from good flatness of said glove, and thus be able to make said cut in such a way very precise, both in depth and in width.

Claims (16)

1. A method for manufacturing a protective glove (1), said method providing for:

   - the production of a textile support member (2) designed to cover the fingers and at least the proximal portion of the hand of a wearer, said textile support member having at least one zone (7) for joining a portion (8) of said support member to the remainder of said support member;

   - the application of a polymer coating solution (10) to at least one portion of the textile support member (2) including the joint zone (7);

   - the processing of said textile support member so that said solution forms a polymer coating (11) on the external surface of at least the joint zone (7);

   said method being characterised in that it provides for a processing of the coated joint zone (7) which is designed to totally destroy the textile support member (2) in said zone in order to form a joint (9) between the portion (8) and the remainder of the support member (2) which is formed by the polymer coating (11), said joint being designed to be able to tear under the effect of a threshold force for tearing off said portion.
2. The method according to claim 1, characterised in that the textile support member (2) is made with at least one structural textile yarn (6), the joint zone (7) being made with a degradable yarn (17) instead of said structural yarn, the method providing for applying a treatment of total degradation of the yarn (17) to form the tearable joint (9).
3. The method according to claim 2, characterised in that the joint zone (7) is made with a hot-melt yarn (17), the method providing for a heat treatment of said zone to remove said yarn.
4. The method according to claim 3, characterised in that it provides for applying a heat treatment to form the polymer coating (11), the hot-melt yarn (17) being removed during said heat treatment.
5. The method according to claim 2, characterised in that the joint zone (7) is made with a soluble yarn (17), the method providing for a solubilisation treatment of said yarn in order to remove it from said zone.
6. The method according to claim 5, characterised in that it provides for applying a rinsing treatment of the polymer coating (11), the soluble yarn (17) being removed during said rinsing treatment.
7. The method according to claim 1, characterised in that the joint zone (7) is cut over its entire thickness to form the tearable joint (9).
8. The method according to claim 1, characterised in that the joint zone (7) is chemically removed over its entire thickness to form the tearable joint (9).
9. The method according to any one of claims 1 to 8, characterised in that it provides a treatment of the polymer (11a) coating the joint zone (7) to reduce the mechanical resistance thereof to tearing.
10. The method according to claim 9, characterised in that the treatment comprises a reduction in the thickness of the polymer coating (11a) of the joint (9).
11. The method according to any one of claims 1 to 10, characterised in that it provides for producing the textile support member (2) by knitting.
12. The method according to claim 11, characterised in that it provides for forming the tearable joint (7) on 1 to 5 rows, in particular on 1 to 3 rows, of knitting.
13. The method according to any one of claims 1 to 12, characterised in that it provides for producing the coating (11) from a polymer selected from the following group: polyurethane, polyurea, natural latex, nitrile rubber, polychloroprene, fluoro-polymer, butyl latex, chlorosulfonated polyethylene (CSM), PVC, a combination of these compounds.
14. A protective glove (1) manufactured by means of a method according to any one of claims 1 to 13, said glove comprising a textile support member (2) designed to cover the fingers and at least the proximal portion of the hand of a wearer, the outer surface of said textile support member being provided with a polymer coating (11) at least at the joint (9) between a portion (8) of said support member and the remainder of said support member, said joint being formed of the single polymer coating (11) which is designed to be able to tear under the effect of a threshold force for tearing off said portion.
15. The protective glove (1) according to claim 14, characterised in that the tearable joint (9) is formed on at least one sleeve (3a) for covering a finger of the wearer.
16. The protective glove (1) according to claim 15, characterised in that the tearable joint (9) is formed at the base of the covering sleeve (3a).

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