EP0643930A1 - Individual protective equipment especially protective gloves - Google Patents

Individual protective equipment especially protective gloves Download PDF

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Publication number
EP0643930A1
EP0643930A1 EP94402090A EP94402090A EP0643930A1 EP 0643930 A1 EP0643930 A1 EP 0643930A1 EP 94402090 A EP94402090 A EP 94402090A EP 94402090 A EP94402090 A EP 94402090A EP 0643930 A1 EP0643930 A1 EP 0643930A1
Authority
EP
European Patent Office
Prior art keywords
protective
ceramic
equipment according
gloves
coating
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
EP94402090A
Other languages
German (de)
French (fr)
Other versions
EP0643930B1 (en
Inventor
Gianni Agostini
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.)
Magep Sa
Original Assignee
Magep 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 Magep Sa filed Critical Magep Sa
Publication of EP0643930A1 publication Critical patent/EP0643930A1/en
Application granted granted Critical
Publication of EP0643930B1 publication Critical patent/EP0643930B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D19/00—Gloves
    • A41D19/015—Protective gloves
    • A41D19/01505—Protective gloves resistant to mechanical aggressions, e.g. cutting. piercing
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/24—Resistant to mechanical stress, e.g. pierce-proof
    • A41D31/245—Resistant to mechanical stress, e.g. pierce-proof using layered materials

Definitions

  • the invention relates to personal protective equipment (PPE), and in particular gloves for handling finished products or during manufacture.
  • PPE personal protective equipment
  • Personal protective equipment including gloves used to handle objects, industrial or not, are currently made by coating rubber or plastics (PVC for example) on a flexible textile substrate.
  • PVC rubber or plastics
  • the main disadvantages are that they do not provide a good grip of wet or lubricated products, due to insufficient adhesion, that the agility and precision of the movements of the hand are considerably limited, that they are not satisfactory when the parts are at a high temperature and they present a high risk of cuts and pitting.
  • the invention overcomes these drawbacks by providing personal protective equipment, and in particular protective gloves, comprising a protective protective ceramic and / or metallic coating on a flexible textile substrate, or the like.
  • the protective outer coating may consist of a single layer of ceramic or metal, or any combination of several such layers, and in particular, preferably, a first metal layer covered with a second ceramic layer.
  • the protective external coating has been formed by hot spraying of ceramics or metals, in the form of powders, onto natural or synthetic textile substrates, a technique for which several methods of production are available.
  • Ni-Cr alloys and aluminum being particularly suitable.
  • the thickness of the coating can be adjusted according to the particular applications for which the product is intended, but an excessively large thickness affects the flexibility of the final product. In general, a thickness of 20 to 200 ⁇ m will be used.
  • Hot spray coatings are obtained by high speed crushing of droplets melted on a substrate.
  • the adhesion of the coating is obtained by mechanical attachment.
  • the process is carried out in a protected environment, by means of robotic movements of the plasma torch, with digital control, making it possible to obtain perfectly uniform thicknesses.
  • the method consists in evaporating the ceramic or metallic powder, of controlled particle size, in a gaseous plasma, and in projecting the droplets of condensation at high speed onto the substrate. By adjusting the various parameters of the projection, and in particular the movements of the robot, in each case, a layer of desired uniform thickness is deposited.
  • the substrate must withstand temperatures above 100 ° C without altering its physico-chemical characteristics
  • protective gloves have been produced according to technique b).
  • an Al2-O3 - TiO2 ceramic coating was deposited, one at a thickness of 100 ⁇ m and the other at a thickness of 150 ⁇ m.
  • the invention is of course not limited to protective gloves only, and can be applied to any personal protective equipment for high temperatures, which must also have good mechanical resistance.

Abstract

The invention relates to an item of individual (personal) protective equipment which comprises an outer protective garment made of ceramic and/or metal over a flexible textile base (substrate). The outer protective garment is advantageously produced using a hot spray technique.

Description

L' invention concerne des équipements de protection individuelle (EPI), et notamment des gants en vue de la manipulation de produits finis ou en cours de fabrication.The invention relates to personal protective equipment (PPE), and in particular gloves for handling finished products or during manufacture.

Les équipements de protection individuelle, et notamment les gants utilisés pour manipuler des objets, industriels ou non, sont à l'heure actuelle réalisés par enduction de caoutchouc ou de matières plastiques (PVC par exemple) sur un substrat textile souple. Les inconvénients principaux sont qu'ils ne fournissent pas une bonne préhension de produits humides ou lubrifiés, en raison d'une adhérence insuffisante, que l'agilité et la précision des mouvements de la main sont considérablement limitées, qu'ils ne sont pas satisfaisants lorsque les pièces sont à une température élevée et qu'ils présentent des risques de coupure et de piqûre importants.Personal protective equipment, including gloves used to handle objects, industrial or not, are currently made by coating rubber or plastics (PVC for example) on a flexible textile substrate. The main disadvantages are that they do not provide a good grip of wet or lubricated products, due to insufficient adhesion, that the agility and precision of the movements of the hand are considerably limited, that they are not satisfactory when the parts are at a high temperature and they present a high risk of cuts and pitting.

L'invention pallie ces inconvénients en fournissant un équipement de protection individuelle, et notamment des gants de protection, comportant un revêtement extérieur protecteur en céramique et/ou métallique sur un substrat textile souple, ou similaire.The invention overcomes these drawbacks by providing personal protective equipment, and in particular protective gloves, comprising a protective protective ceramic and / or metallic coating on a flexible textile substrate, or the like.

Un tel revêtement présente notamment les avantages suivants :

  • résistance remarquable à températures moyennes et élevées,
  • résistance remarquable à l'abrasion,
  • dans des conditions particulières, résistance à la piqûre par des aiguilles,
  • bonne résistance à la coupure,
  • dextérité et épaisseurs limitées.
Such a coating has the following advantages in particular:
  • remarkable resistance to medium and high temperatures,
  • remarkable resistance to abrasion,
  • under special conditions, resistance to needlestick injury,
  • good cut resistance,
  • limited dexterity and thickness.

Le revêtement exérieur protecteur peut consister en une simple couche de céramique ou métallique, ou en toute combinaison de plusieurs telles couches, et notamment, de préférence, en une première couche métallique recouverte d'une seconde couche en céramique.The protective outer coating may consist of a single layer of ceramic or metal, or any combination of several such layers, and in particular, preferably, a first metal layer covered with a second ceramic layer.

Avantageusement, le revêtement extérieur protecteur a été formé par projection à chaud de céramiques ou de métaux, sous forme de poudres, sur des substrats textiles naturels ou synthétiques, technique pour laquelle on dispose de plusieurs méthodes de réalisation.Advantageously, the protective external coating has been formed by hot spraying of ceramics or metals, in the form of powders, onto natural or synthetic textile substrates, a technique for which several methods of production are available.

Bien que de très nombreux types de céramiques puissent être utilisés pour la protection et se prêtent à la projection à chaud, on obtient déjà de bons résultats avec une céramique Al₂O₃ - TiO₂ relativement simple. Bien entendu il est envisageable d'utiliser tout autre type de céramiques, par exemple obtenues à l'aide de mélanges d'oxydes, de nitrures ou de carbures métalliques, et notamment une céramique Zr O₂-CaO.Although many types of ceramics can be used for protection and lend themselves to hot spraying, good results are already obtained with a relatively simple Al₂O₃ - TiO₂ ceramic. Of course, it is conceivable to use any other type of ceramic, for example obtained using mixtures of oxides, nitrides or metal carbides, and in particular a Zr O₂-CaO ceramic.

De nombreux métaux peuvent être mis en oeuvre pour constituer le revêtement extérieur protecteur, les alliages Ni-Cr et l'aluminium convenant particulièrement bien.Many metals can be used to form the protective external coating, Ni-Cr alloys and aluminum being particularly suitable.

L'épaisseur du revêtement peut être réglée en fonction des applications particulières auxquelles est destiné le produit, mais une épaisseur trop importante nuit à la souplesse du produit final. On utilisera en général une épaisseur de 20 à 200 µm.The thickness of the coating can be adjusted according to the particular applications for which the product is intended, but an excessively large thickness affects the flexibility of the final product. In general, a thickness of 20 to 200 µm will be used.

Les revêtements par projection à chaud sont obtenus par écrasement à grande vitesse de gouttelettes fondues sur un substrat. Dans le cas d'un substrat textile, l'adhérence du revêtement est obtenue par un accrochage mécanique. On peut également envisager un traitement préalable favorisant l'accrochage entre substrat et revêtement.Hot spray coatings are obtained by high speed crushing of droplets melted on a substrate. In the case of a textile substrate, the adhesion of the coating is obtained by mechanical attachment. We can also consider a treatment prerequisite promoting attachment between substrate and coating.

On dispose essentiellement de trois méthodes de projection à chaud :

  • a) celle utilisant un chalumeau oxyacétylénique,
  • b) celle utilisant une projection plasma à la pression atmosphérique,
  • c) celle utilisant une projection plasma sous atmosphère contrôlée et à basse pression (5 kPa <P<100 kPa).
There are essentially three hot projection methods:
  • a) that using an oxyacetylene torch,
  • b) that using a plasma projection at atmospheric pressure,
  • c) that using plasma spraying under a controlled atmosphere and at low pressure (5 kPa <P <100 kPa).

Selon la méthode a), on procède manuellement ou de façon robotisée.According to method a), one proceeds manually or robotically.

Selon les méthodes b) et c), on procède en ambiance protégée, au moyen de mouvements robotisés de la torche à plasma, à commande numérique, permettant d'obtenir des épaisseurs parfaitement uniformes. Dans ce cas, le procédé consiste à évaporer la poudre de céramique ou métallique, de granulométrie contrôlée, dans un plasma gazeux, et à projeter à grande vitesse les gouttelettes de condensation sur le substrat. En règlant les différents paramètres de la projection, et notamment les mouvements du robot, dans chaque cas, on dépose une couche d'épaisseur uniforme voulue.According to methods b) and c), the process is carried out in a protected environment, by means of robotic movements of the plasma torch, with digital control, making it possible to obtain perfectly uniform thicknesses. In this case, the method consists in evaporating the ceramic or metallic powder, of controlled particle size, in a gaseous plasma, and in projecting the droplets of condensation at high speed onto the substrate. By adjusting the various parameters of the projection, and in particular the movements of the robot, in each case, a layer of desired uniform thickness is deposited.

Plusieurs couches de natures et d'épaisseurs différentes peuvent être superposées, dans le but d'obtenir des résultats spécifiques.Several layers of different natures and thicknesses can be superimposed, in order to obtain specific results.

Le subtrat doit résister à des températures supérieures à 100°C sans altérations de ses caractéristiques physico-chimiquesThe substrate must withstand temperatures above 100 ° C without altering its physico-chemical characteristics

A titre d'exemple, on a réalisé des gants de protection selon la technique b). Sur un substrat classique, on a déposé un revêtement de céramique Al₂-O₃ - TiO₂, un à une épaisseur de 100 µm et l'autre à une épaisseur de 150 µm.By way of example, protective gloves have been produced according to technique b). On a conventional substrate, an Al₂-O₃ - TiO₂ ceramic coating was deposited, one at a thickness of 100 μm and the other at a thickness of 150 μm.

Ces gants ont été essayés dans des conditions réelles de manipulation et l'on obtient les avantages suivants :
   on constate une meilleure adhérence, et donc une meilleure préhension vis-à-vis des pièces à manipuler, même en présence de couches épaisses de produits lubrifiants, ainsi qu'une diminution importante de l'effort de manipulation, ce qui améliore nettement les conditions de travail et donc la productivité.These gloves have been tested under real conditions of handling and the following advantages are obtained:
there is better adhesion, and therefore better grip with respect to the parts to be handled, even in the presence of thick layers of lubricant products, as well as a significant reduction in the handling effort, which clearly improves the conditions of work and therefore productivity.

On constate qu'il est possible de manipuler dans de meilleures conditions des pièces de températures relativement élevées, et fortement abrasives, la résistance améliorée des gants dans ces conditions augmentant considérablement leur durée d'usage.It is found that it is possible to handle under better conditions parts of relatively high and highly abrasive temperatures, the improved resistance of the gloves under these conditions considerably increasing their service life.

On constate enfin que même dans des circonstances difficiles, il y a moins de risques de coupures ou de détériorations mécaniques des gants revêtus de céramique.Finally, it can be seen that even in difficult circumstances, there is less risk of cuts or mechanical damage to gloves coated with ceramic.

L'invention n'est bien entendu pas limitée aux seuls gants de protection, et peut s'appliquer à tout équipement de protection individuelle pour hautes températures, devant présenter en outre de bonnes résistances mécaniques.The invention is of course not limited to protective gloves only, and can be applied to any personal protective equipment for high temperatures, which must also have good mechanical resistance.

Claims (8)

1.- Equipement de protection individuelle, caractérisé en ce qu'il comporte un revêtement extérieur protecteur en céramique et/ou métallique 1.- Personal protective equipment, characterized in that it includes a protective external ceramic and / or metallic coating 2. - Equipement selon la revendication 1, caractérisé en ce que le revêtement extérieur protecteur consiste en une couche de céramique. 2. - Equipment according to claim 1, characterized in that the protective outer coating consists of a ceramic layer. 3.- Equipement selon la revendication 1, caractérisé en ce que le revêtement extérieur protecteur consiste en une couche métallique. 3.- Equipment according to claim 1, characterized in that the protective outer coating consists of a metal layer. 4.- Equipement selon la revendication 1, caractérisé en ce que le revêtement extérieur protecteur consiste en une première couche métallique et une seconde couche en céramique. 4.- Equipment according to claim 1, characterized in that the protective outer coating consists of a first metallic layer and a second ceramic layer. 5.- Equipement selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le revêtement extérieur protecteur a été formé par projection à chaud. 5.- Equipment according to any one of claims 1 to 4, characterized in that the protective outer coating has been formed by hot spraying. 6.- Equipement selon l une quelconque des revendications 1 à 5, caractérisé en ce que le revêtement extérieur est en céramique Al₂O₃ - TiO₂ et/ou Zr O₂-CaO, et/ou en alliage Ni-Cr et/ou en Al. 6.- Equipment according to any one of claims 1 to 5, characterized in that the external coating is of Al₂O₃ - TiO₂ and / or Zr O₂-CaO ceramic, and / or of Ni-Cr alloy and / or Al. 7.- Equipement selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'il s'agit de gants. 7.- Equipment according to any one of claims 1 to 6, characterized in that it is gloves. 8.- Procédé de réalisation d'un équipement de protection individuelle selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'on projette à chaud une céramique et/ou une composition métallique sur un substrat textile souple, en une ou plusieurs couches successives. 8.- A method of producing personal protective equipment according to any one of claims 1 to 7, characterized in that a ceramic and / or a metallic composition is hot sprayed onto a flexible textile substrate, in one or several successive layers.
EP94402090A 1993-09-21 1994-09-20 Individual protective equipment especially protective gloves Expired - Lifetime EP0643930B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9311207 1993-09-21
FR9311207A FR2710247B1 (en) 1993-09-21 1993-09-21 Personal protective equipment, including protective gloves.

Publications (2)

Publication Number Publication Date
EP0643930A1 true EP0643930A1 (en) 1995-03-22
EP0643930B1 EP0643930B1 (en) 2000-05-10

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EP94402090A Expired - Lifetime EP0643930B1 (en) 1993-09-21 1994-09-20 Individual protective equipment especially protective gloves

Country Status (3)

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EP (1) EP0643930B1 (en)
DE (1) DE69424357T2 (en)
FR (1) FR2710247B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1005731C2 (en) * 1997-04-04 1998-10-07 Zeffex Plastics Bv Lightweight and flexible non-metallic stab resistant material.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4223064A (en) * 1979-05-10 1980-09-16 The United States Of America As Represented By The United States Department Of Energy Alkali metal protective garment and composite material
US4401707A (en) * 1981-12-07 1983-08-30 The United States Of America As Represented By The Secretary Of The Navy Composite heat protective fabric
EP0213756A2 (en) * 1985-08-02 1987-03-11 Drg (Uk) Limited Protective clothing made from welded mutlilayer sheet material incorporating a barrier layer
DE3737299A1 (en) * 1986-11-06 1988-05-11 Lederfabrik Hase Gmbh High-temperature protective glove
EP0390383A1 (en) * 1989-03-31 1990-10-03 Minnesota Mining And Manufacturing Company Carbon-coated ceramic textiles
WO1992021634A1 (en) * 1991-06-03 1992-12-10 Minnesota Mining And Manufacturing Company Yttria-alumina fibers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4223064A (en) * 1979-05-10 1980-09-16 The United States Of America As Represented By The United States Department Of Energy Alkali metal protective garment and composite material
US4401707A (en) * 1981-12-07 1983-08-30 The United States Of America As Represented By The Secretary Of The Navy Composite heat protective fabric
EP0213756A2 (en) * 1985-08-02 1987-03-11 Drg (Uk) Limited Protective clothing made from welded mutlilayer sheet material incorporating a barrier layer
DE3737299A1 (en) * 1986-11-06 1988-05-11 Lederfabrik Hase Gmbh High-temperature protective glove
EP0390383A1 (en) * 1989-03-31 1990-10-03 Minnesota Mining And Manufacturing Company Carbon-coated ceramic textiles
WO1992021634A1 (en) * 1991-06-03 1992-12-10 Minnesota Mining And Manufacturing Company Yttria-alumina fibers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1005731C2 (en) * 1997-04-04 1998-10-07 Zeffex Plastics Bv Lightweight and flexible non-metallic stab resistant material.
WO1998045662A1 (en) * 1997-04-04 1998-10-15 Twaron Products V.O.F. A stab-resisting material, a coated carrier to be used therewith, and clothing made of said material

Also Published As

Publication number Publication date
DE69424357D1 (en) 2000-06-15
DE69424357T2 (en) 2001-02-08
FR2710247B1 (en) 1995-12-08
FR2710247A1 (en) 1995-03-31
EP0643930B1 (en) 2000-05-10

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