EP3976370A1 - Electrostatically dissipating protective glove - Google Patents

Electrostatically dissipating protective glove

Info

Publication number
EP3976370A1
EP3976370A1 EP20721529.4A EP20721529A EP3976370A1 EP 3976370 A1 EP3976370 A1 EP 3976370A1 EP 20721529 A EP20721529 A EP 20721529A EP 3976370 A1 EP3976370 A1 EP 3976370A1
Authority
EP
European Patent Office
Prior art keywords
protective glove
glove
carbon fibers
dipping
protective
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.)
Pending
Application number
EP20721529.4A
Other languages
German (de)
French (fr)
Inventor
Karina KLOTH
Matthias Bartusch
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.)
Uvex Safety Gloves GmbH and Co KG
Original Assignee
Uvex Safety Gloves GmbH and Co KG
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 Uvex Safety Gloves GmbH and Co KG filed Critical Uvex Safety Gloves GmbH and Co KG
Publication of EP3976370A1 publication Critical patent/EP3976370A1/en
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D19/00—Gloves
    • A41D19/0006—Gloves made of several layers of material
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D19/00—Gloves
    • A41D19/0055—Plastic or rubber gloves
    • A41D19/0058—Three-dimensional gloves
    • A41D19/0062—Three-dimensional gloves made of one layer of material
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D19/00—Gloves
    • A41D19/0055—Plastic or rubber gloves
    • A41D19/0058—Three-dimensional gloves
    • A41D19/0065—Three-dimensional gloves with a textile layer underneath
    • 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
    • A41D31/26—Electrically protective, e.g. preventing static electricity or electric shock
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/14—Dipping a core
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B32B5/20—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material foamed in situ
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/245—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it being a foam layer
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0043—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers
    • D06N3/0047—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers obtained by incorporating air, i.e. froth
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
    • D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06N3/10—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds with styrene-butadiene copolymerisation products or other synthetic rubbers or elastomers except polyurethanes
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D2500/00—Materials for garments
    • A41D2500/50—Synthetic resins or rubbers
    • A41D2500/54—Synthetic resins or rubbers in coated form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/02—2 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0207—Materials belonging to B32B25/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/202—Conductive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2437/00—Clothing
    • B32B2437/02—Gloves, shoes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2205/00—Condition, form or state of the materials
    • D06N2205/14—Fibrous additives or fillers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/04—Properties of the materials having electrical or magnetic properties
    • D06N2209/046—Anti-static
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2211/00—Specially adapted uses
    • D06N2211/10—Clothing
    • D06N2211/103—Gloves

Definitions

  • the present invention relates to an electrostatically dissipative protective glove and a method for producing a corresponding protective glove.
  • electrostatically dissipative gloves play a special role. For example, in explosion-proof work areas, it must be ensured that any electrostatic charges that arise are discharged.
  • dispersions with elongated particles such as carbon nanotubes can be used, which are effective in smaller quantities due to their anisotropic properties.
  • the disadvantage of using carbon nanotubes is that they have to be added to the polymer compound in highly dilute dispersions in order to counteract agglomeration of the carbon nanotubes. Dispersions that have less than 5% carbon nanotubes are common. Correspondingly, a larger amount of the dispersion has to be used, which is only possible by reducing the polymer content in the polymer compound. The reduction in the polymer content, however, results in undesirable changes in properties, such as the pH value or viscosity of the polymer compound.
  • the object of the invention is to provide an electrostatically dissipative protective glove with a polymeric foam layer, the polymeric foam having improved stability. Furthermore, the invention is based on the object of providing a method for producing the protective glove according to the invention.
  • the protective glove according to the invention consists of at least two layers, with a first layer being a polymeric foam layer.
  • the polymer foam layer contains carbon fibers, which reduce the volume resistance. Carbon fibers are particularly suitable for this application because, due to their elongated shape, fewer conductive paths can be formed within the polymer matrix than spherical particles. It is sufficient to add significantly less carbon fibers to the latex compound in order to produce the desired through resistance.
  • carbon fibers can be added directly to the latex compound without first being dissolved in a dispersion would have to.
  • the influence of the additive on the properties of the latex compound for example polymer content, viscosity and pH value, and thus on the processability, is negligible.
  • the mechanical properties of the finished glove are also not significantly impaired by the addition of the carbon fibers.
  • the carbon fibers in contrast to commercially available conductive additives, lead to increased foam stability. This means that the foam and thus also the product quality are stable over a longer period of time than with a compound without carbon fibers.
  • the carbon fibers are preferably comminuted carbon fibers with a length between 10 pm and 100 pm, particularly preferably between 50 pm and 250 pm.
  • the fibers can be cut or ground, for example.
  • the diameter of the carbon fibers is significantly smaller than their length, preferably between 2 pm and 25 pm, particularly preferably between 3 pm and 9 pm.
  • fiber bundles made of several individual carbon fibers the overall diameter of which can be larger, for example larger than 100 pm.
  • Other electrically conductive synthetic or natural fibers that are, for example, metallized or coated with conductive material and are available in a wide variety of geometries are also obvious to the person skilled in the art.
  • the foam layer can consist of synthetic or natural polymers.
  • the polymeric foam layer preferably comprises nitrile, chloroprene, isoprene, natural rubber, polyurethane rubber, or a mixture of one or more of these components.
  • the polymeric foam coating can preferably contain further additives, such as, for example, crosslinking aids, thickeners or color pigments.
  • the polymer foam layer particularly preferably consists essentially of nitrile rubber.
  • the polymeric foam layer is foamed, ie it contains gas inclusions. It can be closed-cell foam or open-cell foam or a mixture of both forms. The inclusions can contain air or another gas or gas mixture and have been introduced in various ways. Foam mixers or chemical foaming, for example, are familiar to those skilled in the art.
  • the second layer of the glove consists of a textile carrier material.
  • a textile carrier material for example, increase wearing comfort or offer protection against cuts.
  • the textile carrier is in contact with the user's skin, while the polymer foam layer forms the outer layer of the glove.
  • conductive games are incorporated into the textile carrier material.
  • the conductive games produce the conductivity of the textile carrier.
  • Suitable materials for the conductive game can, for example, be of a metallic nature (e.g. steel, copper or silver), contain carbon fibers and be metalized or otherwise conductively modified games.
  • the protective glove comprises a further, non-foamed polymer layer as a second layer in addition to the foam layer according to the invention.
  • a non-tricot glove can be provided by using a non-foamed polymer layer as a carrier for the foam layer according to the invention. This is useful for chemical protection gloves, for example.
  • the non-foamed polymer layer in this embodiment can optionally be modified to be electrically conductive.
  • the protective glove can also consist of a multilayer system which comprises a textile carrier, one or more non-foamed polymer layers and the foam layer according to the invention. All additional layers can also be modified to be electrically conductive.
  • the protective glove comprises, for example, an unfoamed polymer layer between the textile carrier and the polymeric foam layer according to the invention.
  • the high level of comfort of the textile can be combined with the waterproofness of the unfoamed layer and the conductivity of the polymer layer according to the invention.
  • the volume resistance of the protective glove according to the invention is less than 10 8 ohms. This corresponds to the requirements for protective gloves from DIN EN 16350. According to the invention, this volume resistance can be achieved with a solids content of the carbon fibers in the latex compound of less than 4% by weight.
  • the method according to the invention for producing a protective glove according to the invention comprises the following steps relating to the nitrile rubber foam layer.
  • a latex compound is provided. It is about preferably a latex compound containing nitrile rubber. Carbon fibers are added to the latex compound. The carbon fibers do not require a suspension, but are added directly to the latex compound without causing undesired agglomeration.
  • the compound is foamed.
  • the foaming is preferably carried out in a foam mixer by mechanically incorporating defined volumes of air into the latex compound. The added carbon fibers increase the stability of the foam.
  • the foamed mass is then pumped into a plunge pool.
  • a hand-shaped immersion form is provided and dipped into the foamed latex compound in which the carbon fibers are contained.
  • the dipping form can also have been treated with a coagulating saline solution before diving.
  • the glove is then dried and removed.
  • a hand-shaped dipping form is provided and preheated.
  • the dipping mold is preferably made of aluminum or ceramic.
  • a knitted glove made of a textile carrier material is pulled onto the preheated dipping mold.
  • the knitted glove is preferably interspersed with conductive yarns.
  • the knitted glove is particularly preferably designed in one piece, ie as a so-called “seamless” glove.
  • the dipping form with the knitted glove is immersed in a coagulating salt solution. The coagulant prevents the rubber foam from completely penetrating the textile backing before the latex compound begins to coagulate.
  • the dipping form is pulled out of the salt solution and dried.
  • the dipping form with the dried knitted glove is then put into the foamed latex compound, which contains the carbon fibers, immersed.
  • the dipping form is then pulled out of the latex compound and pre-dried.
  • the dipping mold with the textile carrier that is now coated is then immersed in a water bath in order to remove the excess coagulant.
  • the dipping form with the coated textile carrier is dried, preferably at temperatures from 100.degree. C. to 130.degree.
  • the finished protective glove is removed from the dipping form.
  • the knitted glove on the hand mold is first dipped into the coagulating salt solution, dried and dipped into an unfoamed coating compound.
  • the coated glove is then dipped into the foamed latex compound, which contains the carbon fibers.
  • the dipping form is then pulled out of the latex compound, pre-dried, washed, dried and finally removed from the form.
  • the solids content of the carbon fibers in the latex compound is preferably less than 4.0% by weight, particularly preferably between 4.0% by weight and 1.0% by weight. It is advantageous that with such a low solid content, the mechanical properties of the foam are not negatively influenced, but rather the stability of the foam is even increased.
  • FIG. 1 An exemplary embodiment of a glove according to the invention is shown schematically in FIG.
  • a tricot-coated protective glove with a nitrile rubber foam layer 1 and a textile carrier material on the inside 2 can be seen.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Gloves (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)

Abstract

The invention relates to an electrostatically dissipating protective glove and to a method for manufacturing a corresponding protective glove. The protective glove has a polymer foam layer the volume resistivity of which is reduced to a desired value by adding carbon fibers.

Description

Elektrostatisch ableitfähiger Schutzhandschuh Electrostatically dissipative protective glove
Die vorliegende Erfindung betrifft einen elektrostatisch ableitfähigen Schutzhand schuh, sowie ein Verfahren zur Herstellung eines entsprechenden Schutzhandschuhs. The present invention relates to an electrostatically dissipative protective glove and a method for producing a corresponding protective glove.
Im Bereich der Schutzhandschuhe spielen elektrostatisch ableitfähige Handschuhe eine besondere Rolle. So muss beispielsweise in explosionsgeschützten Arbeitsberei chen dafür gesorgt werden, dass entstehende elektrostatische Aufladungen abgeleitet werden. In the field of protective gloves, electrostatically dissipative gloves play a special role. For example, in explosion-proof work areas, it must be ensured that any electrostatic charges that arise are discharged.
Es ist bekannt, in eine polymere Beschichtung von Schutzhandschuhen Additive ein zuarbeiten, um diverse Eigenschaften, wie beispielsweise Abriebbeständigkeit, Grip oder Flexibilität, positiv zu beeinflussen. It is known to work additives into a polymeric coating of protective gloves in order to have a positive influence on various properties such as abrasion resistance, grip or flexibility.
Es ist ebenfalls bekannt, elektrisch leitfähige Additive in die Beschichtung einzubrin gen, um den Oberflächenwiderstand und/oder den Durchgangswiderstand der Be schichtung herabzusetzen. Beispielsweise werden einem Polymercompound für die Beschichtung Leitrußdispersionen beigefügt. Bedingt durch die sphärische Struktur der darin enthaltenen Rußpartikel, müssen diese in großen Mengen eingesetzt werden, um die gewünschte elektrische Leitfähigkeit zu erzielen. It is also known to introduce electrically conductive additives into the coating in order to reduce the surface resistance and / or the volume resistance of the coating. For example, carbon black dispersions are added to a polymer compound for coating. Due to the spherical structure of the soot particles contained therein, they have to be used in large quantities in order to achieve the desired electrical conductivity.
Alternativ können Dispersionen mit elongierten Partikeln wie Carbon-Nanotubes ein gesetzt werden, welche aufgrund ihrer anisotropen Eigenschaften in geringeren Men gen wirksam sind. Nachteilig an der Verwendung von Carbon-Nanotubes ist, dass sie in stark verdünnten Dispersionen dem Polymercompound zugefügt werden müssen, um einer Agglomeration der Carbon-Nanotubes entgegenzu wirken. Gängig sind Dis persionen, welche unter 5% Carbon-Nanotubes aufweisen. Entsprechend muss eine größere Menge der Dispersion eingesetzt werden, was nur durch eine Verringerung des Polymeranteils im Polymercompound möglich wird. Die Verringerung des Poly meranteils hat jedoch unerwünschte Änderungen der Eigenschaften, wie beispiels weise pH-Wert oder Viskosität des Polymercompounds zur Folge. Eine besondere Herausforderung stellen dabei Schutzhandschuhe mit geschäumter Polymerbeschichtung dar, welche durch isolierende Gaseinschlüsse einen besonders hohen intrinsischen Durchgangswiderstand aufweisen. Zudem hat ein Großteil der gängigen leitfähigen Additive den Nachteil, dass die Stabilität des Schaumes durch einen geringeren Polymeranteil abnimmt. Das bedeutet, dass der Schaum in kürzerer Zeit gröber und/oder dichter wird, also dazu neigt, schneller zusammenzufallen. Dadurch kann eine gleichbleibende Produktqualität nicht sichergestellt werden. Alternatively, dispersions with elongated particles such as carbon nanotubes can be used, which are effective in smaller quantities due to their anisotropic properties. The disadvantage of using carbon nanotubes is that they have to be added to the polymer compound in highly dilute dispersions in order to counteract agglomeration of the carbon nanotubes. Dispersions that have less than 5% carbon nanotubes are common. Correspondingly, a larger amount of the dispersion has to be used, which is only possible by reducing the polymer content in the polymer compound. The reduction in the polymer content, however, results in undesirable changes in properties, such as the pH value or viscosity of the polymer compound. Protective gloves with a foamed polymer coating, which have a particularly high intrinsic volume resistance due to insulating gas inclusions, pose a particular challenge. In addition, the majority of the common conductive additives have the disadvantage that the stability of the foam decreases due to a lower polymer content. This means that the foam becomes coarser and / or denser in a shorter time, so it tends to collapse more quickly. This means that consistent product quality cannot be guaranteed.
Aufgabe der Erfindung ist es, einen elektrostatisch ableitfähigen Schutzhandschuh mit einer polymeren Schaumschicht bereitzustellen, wobei der polymere Schaum eine verbesserte Stabilität aufweist. Des Weiteren liegt der Erfindung die Aufgabe zu grunde, ein Verfahren zur Herstellung des erfindungsgemäßen Schutzhandschuhs be reitzustellen. The object of the invention is to provide an electrostatically dissipative protective glove with a polymeric foam layer, the polymeric foam having improved stability. Furthermore, the invention is based on the object of providing a method for producing the protective glove according to the invention.
Erfindungsgemäß wird die Aufgabe durch einen Schutzhandschuh nach Anspruch 1 und ein Verfahren nach Anspruch 8 gelöst. Vorteilhafte Ausgestaltungen sind Gegen stand der Unteransprüche. According to the invention, the object is achieved by a protective glove according to claim 1 and a method according to claim 8. Advantageous configurations are the subject of the subclaims.
Der erfindungsgemäße Schutzhandschuh besteht aus mindestens zwei Schichten, wo bei eine erste Schicht eine polymere Schaumschicht ist. Die polymere Schaumschicht enthält Carbonfasem, welche den Durchgangswiderstand herabsenken. Carbonfasem eignen sich besonders für diese Anwendung, da sie aufgrund ihrer elongierten Form in geringerer Zahl leitfähige Pfade innerhalb der Polymermatrix ausbilden können als sphärische Partikel. So genügt es, dem Latex-Compound deutlich weniger Carbonfa sern zuzugeben, um den gewünschten Durchgang swiderstand herzustellen. Darüber hinaus können, im Gegensatz zu Carbon-Nanotubes, Carbonfasern dem Latex-Com pound direkt zugegeben werden, ohne das sie zuvor in einer Dispersion gelöst werden müssten. Entsprechend ist der Einfluss des Additivs auf die Eigenschaften des Latex- Compounds, beispielsweise Polymergehalt, Viskosität und pH-Wert, und somit auf die Verarbeitbarkeit vemachlässigbar. Auch die mechanischen Eigenschaften des fer tiggestellten Handschuhs werden durch die Zugabe der Carbonfasern nicht wesentlich beeinträchtigt. Darüber hinaus wurde überraschenderweise festgestellt, dass die Car- bonfasem im Gegensatz zu handelsüblichen leitfähigen Additiven zu einer erhöhten Schaumstabilität führen. Das heißt, der Schaum und damit auch die Produktqualität sind über längere Zeit stabil als bei einem Compound ohne Carbonfasem. The protective glove according to the invention consists of at least two layers, with a first layer being a polymeric foam layer. The polymer foam layer contains carbon fibers, which reduce the volume resistance. Carbon fibers are particularly suitable for this application because, due to their elongated shape, fewer conductive paths can be formed within the polymer matrix than spherical particles. It is sufficient to add significantly less carbon fibers to the latex compound in order to produce the desired through resistance. In addition, in contrast to carbon nanotubes, carbon fibers can be added directly to the latex compound without first being dissolved in a dispersion would have to. Correspondingly, the influence of the additive on the properties of the latex compound, for example polymer content, viscosity and pH value, and thus on the processability, is negligible. The mechanical properties of the finished glove are also not significantly impaired by the addition of the carbon fibers. In addition, it was surprisingly found that the carbon fibers, in contrast to commercially available conductive additives, lead to increased foam stability. This means that the foam and thus also the product quality are stable over a longer period of time than with a compound without carbon fibers.
Bevorzugt handelt es sich bei den Carbonfasem um zerkleinerte Carbonfaser mit einer Länge zwischen lOpm und lOOOpm, besonders bevorzugt zwischen 50pm und 250pm. Dazu können die Fasern beispielsweise geschnitten oder gemahlen sein. The carbon fibers are preferably comminuted carbon fibers with a length between 10 pm and 100 pm, particularly preferably between 50 pm and 250 pm. For this purpose, the fibers can be cut or ground, for example.
Erfindungsgemäß ist der Durchmesser der Carbonfasern deutlich kleiner als ihre Länge, bevorzugt zwischen 2pm und 25pm, besonders bevorzugt zwischen 3pm und 9pm. Denkbar sind auch Faserbündel aus mehreren einzelnen Carbonfasem, deren Gesamtdurchmesser größer, beispielsweise größer lOOpm sein kann. Für den Fach mann naheliegend sind zudem andere elektrisch leitfähige synthetische oder natürli che Fasern, die beispielsweise metallisiert oder mit Leitmß beschichtet sind, und in verschiedensten Geometrien verfügbar sind. According to the invention, the diameter of the carbon fibers is significantly smaller than their length, preferably between 2 pm and 25 pm, particularly preferably between 3 pm and 9 pm. Also conceivable are fiber bundles made of several individual carbon fibers, the overall diameter of which can be larger, for example larger than 100 pm. Other electrically conductive synthetic or natural fibers that are, for example, metallized or coated with conductive material and are available in a wide variety of geometries are also obvious to the person skilled in the art.
Die Schaumschicht kann aus synthetischen oder natürlichen Polymeren bestehen. Be vorzugt umfasst die polymere Schaumschicht Nitril-, Chloropren-, Isopren-, Naturla tex-, Polyurethankautschuk, oder einer Mischung aus einer oder mehrerer dieser Komponenten. Bevorzugt kann die polymere Schaumbeschichtung neben den erfin dungsgemäßen Carbonfasem weitere Additive enthalten, wie zum Beispiel Vemet- zungshilfsmittel, Verdicker oder Farbpigmente. Besonders bevorzugt besteht die po lymere Schaumschicht im Wesentlichen aus Nitrilkautschuk. Erfindungsgemäß ist die polymere Schaumschicht geschäumt, d.h. sie enthält Gasein schlüsse. Es kann sich dabei um geschlossenporigen Schaum oder offenporigen Schaum oder eine Mischung beider Formen handeln. Die Einschlüsse können Luft oder ein anderes Gas bzw. Gasgemisch enthalten und auf verschiedene Weisen einge bracht worden sein. Dem Fachmann geläufig sind beispielsweise Schaummixer oder chemisches Schäumen. The foam layer can consist of synthetic or natural polymers. The polymeric foam layer preferably comprises nitrile, chloroprene, isoprene, natural rubber, polyurethane rubber, or a mixture of one or more of these components. In addition to the carbon fibers according to the invention, the polymeric foam coating can preferably contain further additives, such as, for example, crosslinking aids, thickeners or color pigments. The polymer foam layer particularly preferably consists essentially of nitrile rubber. According to the invention, the polymeric foam layer is foamed, ie it contains gas inclusions. It can be closed-cell foam or open-cell foam or a mixture of both forms. The inclusions can contain air or another gas or gas mixture and have been introduced in various ways. Foam mixers or chemical foaming, for example, are familiar to those skilled in the art.
In einer bevorzugten Ausgestaltung des Schutzhandschuhs besteht die zweite Schicht des Handschuhs aus einem textilen Trägermaterial. Solche trikotierten Handschuhe erhöhen beispielsweise den Tragekomfort oder bieten einen Schnittschutz. Der textile Träger steht dabei mit der Haut des Benutzers in Kontakt, während die polymere Schaumschicht die äußere Schicht des Handschuhs bildet. In a preferred embodiment of the protective glove, the second layer of the glove consists of a textile carrier material. Such tricot gloves, for example, increase wearing comfort or offer protection against cuts. The textile carrier is in contact with the user's skin, while the polymer foam layer forms the outer layer of the glove.
In einer weiteren bevorzugten Ausgestaltung des Schutzhandschuhs sind in das textile Trägermaterial leitfähige Game eingearbeitet. Die leitfähigen Game stellen die Ab leitfähigkeit des textilen Trägers her. Geeignete Materialien für die leitfähigen Game können beispielsweise metallischer Natur sein (z.B. Stahl, Kupfer oder Silber), Car- bonfasem beinhalten sowie metallisierte oder anderweitig leitfähig modifizierte Game sein. In a further preferred embodiment of the protective glove, conductive games are incorporated into the textile carrier material. The conductive games produce the conductivity of the textile carrier. Suitable materials for the conductive game can, for example, be of a metallic nature (e.g. steel, copper or silver), contain carbon fibers and be metalized or otherwise conductively modified games.
In einer anderen Ausgestaltungsform umfasst der Schutzhandschuh eine weitere, un- geschäumte Polymerschicht als zweite Schicht neben der erfindungsgemäßen Schaumschicht. So kann ein untrikotierter Handschuh bereitgestellt werden, indem als Träger für die erfindungsgemäße Schaumschicht eine nichtgeschäumte Polymer schicht verwendet wird. Dies ist beispielsweise zweckmäßig für Chemikalienschutz handschuhe. Die nichtgeschäumte Polymerschicht in dieser Ausgestaltungsform kann gegebenenfalls elektrisch leitfähig modifiziert sein. Alternativ dazu kann der Schutzhandschuh auch aus einem Mehrschichtsystem beste hen, das einen textilen Träger, eine oder mehrere nichtgeschäumte Polymerschichten und die erfindungsgemäße Schaumschicht umfasst. Alle zusätzlichen Schichten kön nen ebenfalls elektrisch leitfähig modifiziert sein. In einer entsprechenden Ausgestal tungsform umfasst der Schutzhandschuh zum Beispiel eine ungeschäumte Polymer schicht zwischen dem textilen Träger und der erfindungsgemäßen polymeren Schaumschicht. Dadurch können beispielsweise der hohe Tragekomfort des Textils mit der Wasserdichtigkeit der ungeschäumten Schicht und der Ableitfähigkeit der er findungsgemäßen Polymerschicht kombiniert werden. In another embodiment, the protective glove comprises a further, non-foamed polymer layer as a second layer in addition to the foam layer according to the invention. For example, a non-tricot glove can be provided by using a non-foamed polymer layer as a carrier for the foam layer according to the invention. This is useful for chemical protection gloves, for example. The non-foamed polymer layer in this embodiment can optionally be modified to be electrically conductive. As an alternative to this, the protective glove can also consist of a multilayer system which comprises a textile carrier, one or more non-foamed polymer layers and the foam layer according to the invention. All additional layers can also be modified to be electrically conductive. In a corresponding embodiment, the protective glove comprises, for example, an unfoamed polymer layer between the textile carrier and the polymeric foam layer according to the invention. In this way, for example, the high level of comfort of the textile can be combined with the waterproofness of the unfoamed layer and the conductivity of the polymer layer according to the invention.
Darüber hinaus sind Kombinationen weitere gleicher oder verschiedener Textil- bzw. Polymerschichten denkbar. Auch ist naheliegend, dass die verschiedenen Schichten den Handschuh nicht in gleichem Ausmaß bedecken. Beispielsweise sind trikotierte, mechanische Schutzhandschuhe nur im Finger und Handflächenbereich beschichtet. Chemikalienschutzhandschuhe sind dagegen vollständig, das heißt bis einschließlich der Stulpe beschichtet, weisen oft aber eine zusätzliche Gripschicht auf, die nur den Finger- und Handflächenbereich bedeckt. In addition, combinations of further identical or different textile or polymer layers are conceivable. It is also obvious that the different layers do not cover the glove to the same extent. For example, tricot, mechanical protective gloves are only coated in the finger and palm area. Chemical protective gloves, on the other hand, are completely coated, i.e. coated up to and including the cuff, but often have an additional grip layer that only covers the finger and palm area.
In einer weiteren bevorzugten Ausführungsform beträgt der Durchgangswiderstand des erfindungsgemäßen Schutzhandschuhs weniger als 108 Ohm. Dies entspricht den Anforderungen für Schutzhandschuhe aus DIN EN 16350. Erfindungsgemäß lässt sich dieser Durchgangswiderstand mit einem Feststoffanteil der Carbonfasern im La tex-Compound von weniger als 4 Gew.-% realisieren. In a further preferred embodiment, the volume resistance of the protective glove according to the invention is less than 10 8 ohms. This corresponds to the requirements for protective gloves from DIN EN 16350. According to the invention, this volume resistance can be achieved with a solids content of the carbon fibers in the latex compound of less than 4% by weight.
Das erfindungsgemäße Verfahren zur Herstellung eines erfindungsgemäßen Schutz handschuhs umfasst die folgenden Schritte betreffend die Nitrilkautschuk-Schaum schicht. Zunächst wird ein Latex-Compound bereitgestellt. Dabei handelt es sich bevorzugt um ein Nitrilkautschuk enthaltendes Latex-Compound. Zu dem Latex- Compound werden Carbonfasem hinzugefügt. Die Carbonfasern bedürfen keiner Sus pension, sondern werden dem Latex-Compound direkt hinzugefügt, ohne dass es zu ungewünschten Agglomerationen kommt. In einem nächsten Schritt wird der Com pound aufgeschäumt. Das Aufschäumen erfolgt bevorzugt in einem Schaummischer durch mechanisches Einarbeiten von definierten Luftvolumina in den Latex-Com pound. Die hinzugefügten Carbonfasern erhöhen die Stabilität des Schaums. Die auf geschäumte Masse wird danach in ein Tauchbecken gepumpt. The method according to the invention for producing a protective glove according to the invention comprises the following steps relating to the nitrile rubber foam layer. First, a latex compound is provided. It is about preferably a latex compound containing nitrile rubber. Carbon fibers are added to the latex compound. The carbon fibers do not require a suspension, but are added directly to the latex compound without causing undesired agglomeration. In the next step, the compound is foamed. The foaming is preferably carried out in a foam mixer by mechanically incorporating defined volumes of air into the latex compound. The added carbon fibers increase the stability of the foam. The foamed mass is then pumped into a plunge pool.
In einem bevorzugten Verfahren zur Herstellung eines untrikotierten Schutzhand schuhs wird eine handförmige Tauchform bereitgestellt und in den aufgeschäumte Latex-Compound, in dem die Carbonfasem enthalten sind, eingetaucht. Die Tauch form kann zudem vor dem Tauchen mit einer koagulierenden Salzlösung behandelt worden sein. Anschließend wird der Handschuh getrocknet und abgezogen. In a preferred method for producing a non-tricot protective glove, a hand-shaped immersion form is provided and dipped into the foamed latex compound in which the carbon fibers are contained. The dipping form can also have been treated with a coagulating saline solution before diving. The glove is then dried and removed.
In einem bevorzugten Verfahren zur Herstellung eines trikotierten Schutzhandschuhs werden die folgenden Schritte durchgeführt: Zunächst wird eine handförmige Tauch form bereitgestellt und vorgewärmt. Die Tauchform besteht bevorzugt aus Alumi nium oder Keramik. Auf die vorgewärmte Tauchform wird ein Strickhandschuh aus einem textilen Trägermaterial aufgezogen. Bevorzugt ist der Strickhandschuh mit leit fähigen Garnen durchsetzt. Besonders bevorzugt ist der Strickhandschuh einteilig, d.h. als sogenannter„seamless“-Handschuh, ausgebildet. In einem nächsten Schritt wird die Tauchform mit dem Strickhandschuh in eine koagulierende Salzlösung ge taucht. Das Koagulant verhindert, dass der Kautschuk-Schaum den textilen Träger vollständig durchdringt, bevor die Koagulation des Latex-Compounds beginnt. In ei nem nächsten Schritt wird die Tauchform aus der Salzlösung herausgezogen und ge trocknet. Die Tauchform mit dem getrockneten Strickhandschuh wird anschließend in den aufgeschäumten Latex-Compound, in dem die Carbonfasem enthalten sind, eingetaucht. Anschließend wird die Tauchform aus dem Latex-Compound herausge zogen und vorgetrocknet. Darauffolgend wird die Tauchform mit dem nun beschich teten textilen Träger in ein Wasserbad eingetaucht, um das überschüssige Koagulant zu entfernen. In einem nächsten Schritt wird die Tauchform mit dem beschichteten, textilen Träger getrocknet, bevorzugt bei Temperaturen von 100°C bis 130°C. In ei nem letzten Schritt wird der fertige Schutzhandschuh von der Tauchform abgezogen. In a preferred method for producing a tricot protective glove, the following steps are carried out: First, a hand-shaped dipping form is provided and preheated. The dipping mold is preferably made of aluminum or ceramic. A knitted glove made of a textile carrier material is pulled onto the preheated dipping mold. The knitted glove is preferably interspersed with conductive yarns. The knitted glove is particularly preferably designed in one piece, ie as a so-called “seamless” glove. In the next step, the dipping form with the knitted glove is immersed in a coagulating salt solution. The coagulant prevents the rubber foam from completely penetrating the textile backing before the latex compound begins to coagulate. In a next step, the dipping form is pulled out of the salt solution and dried. The dipping form with the dried knitted glove is then put into the foamed latex compound, which contains the carbon fibers, immersed. The dipping form is then pulled out of the latex compound and pre-dried. The dipping mold with the textile carrier that is now coated is then immersed in a water bath in order to remove the excess coagulant. In a next step, the dipping form with the coated textile carrier is dried, preferably at temperatures from 100.degree. C. to 130.degree. In a final step, the finished protective glove is removed from the dipping form.
In einem bevorzugten Verfahren zur Herstellung eines mehrschichtigen, trikotierten Schutzhandschuhs wird der Strickhandschuh auf der Handform zunächst in die koa gulierende Salzlösung getaucht, getrocknet und in ein ungeschäumtes Beschichtungs- Compound getaucht. Anschließend wird der beschichtete Handschuh in den aufge schäumten Latex-Compound, in dem die Carbonfasern enthalten sind, eingetaucht. Danach wird die Tauchform aus dem Latex-Compound herausgezogen, vorgetrock net, gewaschen, getrocknet und zuletzt von der Form abgezogen. In a preferred method for producing a multi-layer, tricot protective glove, the knitted glove on the hand mold is first dipped into the coagulating salt solution, dried and dipped into an unfoamed coating compound. The coated glove is then dipped into the foamed latex compound, which contains the carbon fibers. The dipping form is then pulled out of the latex compound, pre-dried, washed, dried and finally removed from the form.
Bevorzugt beträgt der Feststoffanteil der Carbonfasem in dem Latex-Compound we niger als 4,0 Gew.-%, besonders bevorzugt zwischen 4,0 Gew.-% und 1,0 Gew.-%. Vorteilhaft ist, dass bei einem solch geringen Feststoffanteil die mechanischen Eigen schaften des Schaums nicht negativ beeinflusst werden, sondern sich die Stabilität des Schaums sogar erhöht. The solids content of the carbon fibers in the latex compound is preferably less than 4.0% by weight, particularly preferably between 4.0% by weight and 1.0% by weight. It is advantageous that with such a low solid content, the mechanical properties of the foam are not negatively influenced, but rather the stability of the foam is even increased.
Ein Ausführungsbeispiel eines erfindungsgemäßen Handschuhs wird schematisch in Figur 1 dargestellt. Zu sehen ist ein trikotierter Schutzhandschuh mit einer Nitrilkaut schuk-Schaumschicht 1 und einem textilen Trägermaterial auf der Innenseite 2. An exemplary embodiment of a glove according to the invention is shown schematically in FIG. A tricot-coated protective glove with a nitrile rubber foam layer 1 and a textile carrier material on the inside 2 can be seen.

Claims

Ansprüche Expectations
1. Schutzhandschuh bestehend aus mindestens zwei Schichten, wobei eine erste Schicht eine polymere Schaumschicht ist, dadurch gekennzeichnet, dass die po lymere Schaumschicht Carbonfasern mit einem Durchmesser zwischen 2pm und 25pm enthält. 1. Protective glove consisting of at least two layers, a first layer being a polymeric foam layer, characterized in that the polymeric foam layer contains carbon fibers with a diameter between 2pm and 25pm.
2. Schutzhandschuh gemäß Anspruch 1 , dadurch gekennzeichnet, dass die polymere Schaumschicht Nitril-, Chloropren-, Isopren-, Naturlatex-, Polyurethankaut schuk, oder einer Mischung dieser umfasst. 2. Protective glove according to claim 1, characterized in that the polymeric foam layer comprises nitrile, chloroprene, isoprene, natural latex, polyurethane rubber, or a mixture of these.
3. Schutzhandschuh gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, dass die polymere Schaumschicht im Wesentlichen aus Nitrilkautschuk besteht. 3. Protective glove according to claim 1 or 2, characterized in that the polymeric foam layer consists essentially of nitrile rubber.
4. Schutzhandschuh gemäß einem der vorhergehenden Ansprüche, dadurch gekenn zeichnet, dass eine zweite Schicht durch ein textiles Trägermaterial gegeben ist. 4. Protective glove according to one of the preceding claims, characterized in that a second layer is provided by a textile carrier material.
5. Schutzhandschuh gemäß Anspruch 4, dadurch gekennzeichnet, dass in das textile Trägermaterial elektrisch leitfähige Game eingearbeitet sind. 5. Protective glove according to claim 4, characterized in that electrically conductive games are incorporated into the textile carrier material.
6. Schutzhandschuh gemäß einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass eine zweite Schicht durch eine ungeschäumte Polymerschicht gegeben ist. 6. Protective glove according to one of claims 1 to 3, characterized in that a second layer is provided by an unfoamed polymer layer.
7. Schutzhandschuh gemäß einem der vorhergehenden Ansprüche, dadurch gekenn zeichnet, dass der Durchgangswiderstand des Schutzhandschuhs weniger als 108 Ohm, gemessen gemäß DIN EN 16350, beträgt. 7. Protective glove according to one of the preceding claims, characterized in that the volume resistance of the protective glove, measured according to DIN EN 16350, is less than 10 8 ohms.
8. Verfahren zur Herstellung eines Schutzhandschuhs gemäß einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Herstellung der polymeren Schaum schicht die folgenden Schritte umfasst: a. Bereitstellen eines Latex-Compounds, 8. A method for producing a protective glove according to any one of claims 1 to 7, characterized in that the production of the polymeric foam layer comprises the following steps: a. Providing a latex compound,
b. Hinzufügen von Carbonfasem zu dem Latex-Compound, wobei die Carbonfasern einen Durchmesser von 2pm bis 25pm aufweisen, c. Aufschäumen des Carbonfasern enthaltenden Latex-Compounds durch mechanisches Einarbeiten eines vorbestimmten Luftvolumens, d. Eintauchen einer Tauchform in das aufgeschäumte Latex-Compound b. Adding carbon fibers to the latex compound, the carbon fibers having a diameter of 2 pm to 25 pm, c. Foaming of the latex compound containing carbon fibers by mechanically incorporating a predetermined volume of air, d. Immersing a dipping mold in the foamed latex compound
9. Verfahren zur Herstellung eines Schutzhandschuhs gemäß einem der Ansprüche 1 bis 7, umfassend folgende Schritte: 9. A method for producing a protective glove according to any one of claims 1 to 7, comprising the following steps:
a. Vorwärmen einer Tauchform in Form einer Hand, a. Preheating of a dipping mold in the shape of a hand,
b. Aufziehen eines Strickhandschuhs bestehend aus einem textilen Trä germaterial auf die Tauchform, b. Pulling a knitted glove consisting of a textile carrier material onto the dipping mold,
c. Tauchen der Tauchform mit dem Strickhandschuh in eine koagulie rende Salzlösung, c. Dipping the dipping form with the knitted glove in a coagulating saline solution,
d. Herausziehen der Tauchform mit dem Strickhandschuh aus der Salz lösung und anschließende Trocknung, d. Pulling out the dip form with the knitted glove from the salt solution and subsequent drying,
e. Durchführen der Schritte a.-d. gemäß Anspruch 8, e. Carry out steps a.-d. according to claim 8,
f. Herausziehen der Tauchform mit dem Strickhandschuh aus dem La tex-Compound und anschließendes Vortrocknen, f. Pulling out the dipping form with the knitted glove from the La tex compound and subsequent pre-drying,
g. Eintauchen der Tauchform mit dem beschichteten Strickhandschuh in ein Wasserbad, G. Immersing the dipping form with the coated knitted glove in a water bath,
h. Trocknen der Tauchform mit dem beschichteten Strickhandschuh bei Temperaturen von 100°C bis 130°C, H. Drying the dipping form with the coated knitted glove at temperatures from 100 ° C to 130 ° C,
i. Abziehen des fertigen Schutzhandschuhs. i. Removing the finished protective glove.
10. Verfahren gemäß einem der Ansprüche 8 oder 9, dadurch gekennzeichnet, dass der Feststoffanteil der Carbonfasern in dem Latex-Compound weniger als 4 Gew.-% beträgt. 10. The method according to any one of claims 8 or 9, characterized in that the solids content of the carbon fibers in the latex compound is less than 4 wt .-%.
11. Verfahren gemäß einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, dass der Latex-Compound Nitrilkautschuk enthält. 11. The method according to any one of claims 8 to 10, characterized in that the latex compound contains nitrile rubber.
EP20721529.4A 2019-05-31 2020-04-23 Electrostatically dissipating protective glove Pending EP3976370A1 (en)

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AU2020284400A1 (en) 2021-12-23
CN113950407A (en) 2022-01-18
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ZA202109367B (en) 2022-08-31

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