Dissipative glove and method for producing a dissipative glove

Description

[0001] The invention relates to a glove having a polymeric outer layer in at least one region, particularly in an inner hand region of the glove. Furthermore, the invention relates to a method for producing such a glove.

[0002] For the production of sensitive electronic (ESDS, E electro S tatic D ischarge S sensitive) components, for example for electromobility solutions, there is a particular need for conductive clothing. In particular, there is a need for clothing to prevent and / or reduce electrostatic charges (ESD clothing, E electro S tatic D ischarge clothing).

[0003] To protect such components, dissipative clothing, in particular ESD clothing, should enable any electrostatic charge to be dissipated through all items of the worker's clothing. This requires, among other things, dissipative, particularly ESD-capable, gloves. The classification of a dissipative item of clothing, in particular a glove, can be based on its volume resistance and / or its surface resistance, for example measured in accordance with the EN 1149 or EN 61340 series of standards or in accordance with one of the EN 16350 or EN 20345 standards and / or in accordance with Chapters 2 and 7 of the Technical Rules for Hazardous Substances 727. In particular, a glove with a volume resistance between 10 0 < Ω and 10 11 < Ω can be classified as dissipative. A glove with a volume resistance between 10 5 < Ω and 3.5 × 10 7 < Ω can be classified as ESD-capable.

[0004] W+R INDUSTRY GmbH, Metzingen, markets an ESD protective glove with a seamless knitted liner called "ECOMASTER VELOX ESD." The knitted liner incorporates a yarn containing carbon fibers, making it conductive, particularly ESD-capable. The glove's palm is coated with a non-textile, polymeric outer layer. This outer layer is, among other things, oil-resistant and liquid-repellent, allowing the glove to meet the relevant chemical requirements and, for example, be used for handling dry and moist, particularly oily, parts. Thanks to the conductive knitted liner, the glove is also, in principle, suitable for handling sensitive electronic components. However, the outer layer also determines the resulting electrical resistance of the glove, so the glove's effective electrical conductivity has not yet been precisely defined.GB2307845A describes the preamble of claim 1.

[0005] The object of the present invention is therefore to provide a generic glove with improved, in particular precisely adjustable, conductivity. Furthermore, the object is to provide a manufacturing method that enables particularly simple and cost-effective production of such a glove. The invention is described in the appended set of claims.

[0006] The object is achieved by a glove which has a non-textile, polymeric outer layer at least in one region, in particular in an inner hand region of the glove, wherein the outer layer has electrically conductive particles, in particular electrically conductive nanoparticles.

[0007] Thus, the outer layer can also be electrically conductive.

[0008] Electrostatic charges that build up, for example, when handling a sensitive electronic component, can be dissipated via the outer layer of the glove. This protects the sensitive electronic component against electrostatic hazards. Depending on the quantity and distribution of the conductive particles incorporated into the outer layer, the dissipation capacity of the outer layer, and thus that of the glove, can be precisely adjusted.

[0009] Such a glove can be touchscreen-capable. In particular, the glove can be configured to enable inputs on touch-sensitive screens, for example, capacitive screens. For this purpose, the outer layer can extend to one or more fingertip areas of the glove.

[0010] A particle can be understood as a three-dimensional micro-particle which, in particular, cannot be embedded in a macroscopic structure, for example as part of a thread, yarn or a macroscopic fibre.

[0011] A nanoparticle can be understood as a particle with a maximum diameter of up to 100 nm. The electrically conductive particles can be loosely distributed in the outer layer. In particular, they can be homogeneously distributed throughout the outer layer. A material, in particular a particle, can be considered conductive if its specific conductivity is at least 10 -11 < S / m, preferably at least 10 -8 < S / m.

[0012] The glove is multi-layered.

[0013] The glove can be designed as a ready-made and / or knitted glove. For this purpose, the glove has a textile base layer, in particular a knitted liner. The outer layer can then be formed as a coating on the base layer. The base layer, in particular the knitted liner, can be seamless.

[0014] The base layer is electrically conductive.

[0015] In order to make the base layer sufficiently conductive, it has a base carrier material and an electrically conductive yarn.

[0016] The electrically conductive yarn can preferably be knitted, twisted, and / or spun, in particular with the base carrier material. In particular, one or more electrically conductive yarns can be present. The base layer can further comprise several different base carrier materials. Thus, the glove can be tailored to specific mechanical, chemical, and / or physical requirements, for example abrasion resistance, chemical resistance, or thermal conductivity. In particular, the base carrier material can be selected according to such requirements. The base carrier material can comprise a polymer, for example polyamide, in particular aramid, para-aramid, and / or meta-aramid, polyester, polyvinyl chloride, polyurethane, and / or polyethylene, particularly preferably high-performance polyethylene, wool, cotton, carbon fibers, glass fibers, and / or leather.The base carrier material can also be made of synthetic leather and / or contain such. The synthetic leather can be made of polyurethane and / or contain polyurethane.

[0017] The electrically conductive yarn is made of an electrically conductive material, in particular copper, steel, carbon, in particular in the form of carbon fibers, silver and / or gold, and / or is coated with the electrically conductive material.

[0018] In such a ready-made and / or knitted glove, the outer layer can be produced by dipping, printing, spraying, and / or as a trim. To produce the outer layer as a trim, it can first be produced separately and then joined to the base layer, for example, by sewing it on. The outer layer can, in particular, have a homogeneous distribution of particles.

[0019] The outer layer of such a glove can preferably comprise polyurethane, acrylonitrile butadiene rubber, latex and / or polyvinyl chloride.

[0020] The particles act as conductivity mediators for the outer layer. For this purpose, they can be made of a material with a high specific electrical conductivity and / or contain such a material. Therefore, it has proven particularly effective for the particles to contain carbon, especially graphite and / or graphene, tungsten, stainless steel, indium tin oxide, fluorine-doped tin(IV) oxide, aluminum-doped zinc oxide, and / or antimony-doped tin(IV) oxide.

[0021] The outer layer can contain the particles at a maximum of 50 volume percent, preferably at most 30 volume percent. A proportion in the range of 0.5 to 3 volume percent is particularly conceivable. Particles, in particular nanoparticles, made of indium tin oxide in a proportion of 0.5 to 1 volume percent, for example, have proven particularly suitable. It is also conceivable for particles, in particular nanoparticles, to contain nanotubes, in particular carbon nanotubes, or for them to be formed as such. The nanotubes, in particular the carbon nanotubes, can be dispersed. They can be present in a proportion of 2 to 3 volume percent. The surface properties of the glove can be adjusted depending on the field of application of the glove if the glove, in particular the outer layer, is surface-treated, in particular shot and / or sandblasted. For example, the glove can be shot blasted with copper shot.

[0022] The outer layer can have a specific electrical conductivity of at least 10 -11 < S / m, preferably of at least 10 -8 < S / m. This can be achieved by selecting the material of the particles, their size and / or their distribution accordingly. The glove can be conductive, in particular ESD-capable. Such a conductive, in particular ESD-capable, glove can be particularly suitable for use when working in explosion-protection areas, in particular in zones 1, 2, 21 and / or 22. In order to ensure the volume resistance of the glove required for the respective category, the conductivity of at least one layer of the glove can be suitably adjusted. In particular, the conductivity of the outer layer can be adjusted by selecting the proportion of particles in the outer layer.

[0023] Further features and advantages of the invention will become apparent from the following detailed description of an embodiment of the invention with reference to the figures of the drawing, which show details essential to the invention, as well as from the claims.

[0024] The individual features can be implemented individually or in combinations in variants of the invention. The schematic drawing illustrates exemplary embodiments of the invention, which are explained in more detail in the following description.

[0025] They show: Fig. 1 a glove with a knitted liner; Fig. 2 a disposable glove that does not fall under the subject of the protection request and Fig. 3 a flow chart of a process for manufacturing a glove.

[0026] Fig. 1 shows a glove 10. The glove 10 has a, in particular textile, knitted liner12 on which a non-textile, polymeric outer layer 14, particularly in the area of ​​the palm of the glove 10. The glove 10 is thus multi-layered.

[0027] The knit liner 12 is seamless.

[0028] The knitted liner 12 is also conductive. It is made of a non-conductive yarn, for example a polyamide yarn, as the base material. 18 and a conductive yarn 16 knitted. The conductive yarn 16 can, for example, be spun from carbon fibers.

[0029] The outer layer 14 is made of polyurethane. It is made of conductive particles 20, One particle, for example, is provided with the reference numeral 20. The particles 20 are formed from indium tin oxide, in particular, the particles 20 are nanoparticles of indium tin oxide. Thus, the outer layer 14 is also electrically conductive.

[0030] The outer layer 14 is applied to the knitted liner 12 by dipping.

[0031] Fig. 2 shows a glove designed as a disposable glove 100, which does not fall within the scope of the protection sought.

[0032] The glove 100 has, in particular as the only layer, a non-textile, polymeric outer layer 114 In contrast to the glove 10 ( Fig. 1 ) it has no textile base layer, especially no knitted liner (12 of the Fig. 1 ). It is also formed by immersion bathing. For this purpose, a hand-shaped immersion mold was placed in an immersion bath.

[0033] Its outer layer 114 is made of acrylonitrile butadiene rubber. Electrically conductive particles are embedded in it. 120 incorporated, of which one particle is again provided with the reference number 120. The particles 120 are homogeneously distributed in the outer layer 114.

[0034] The conductive particles 120 are made of indium tin oxide. The particles 120 are also formed as nanoparticles.

[0035] The two gloves 10 ( Fig. 1 ) and 100 ( Fig. 2 ) have a volume resistance, measured according to EN 61340-5-1, between 10 5 < Ω and 3.5 × 10 7 < Ω. Both gloves 10 and 100 are therefore ESD-capable.

[0036] For this purpose, the outer layers 14 and 114 have a proportion of approximately 1 volume percent of indium tin oxide in the form of particles 20 and 120, respectively. Alternatively or additionally, it is also conceivable that the outer layers 14 and 114 have approximately 2 to 3 volume percent of particles 20 and 120, respectively, formed as dispersed carbon nanotubes.

[0037] The two outer layers 14, 114 cover the respective fingertips of the gloves 10 and 100.

[0038] Both gloves 10, 100 are particularly touchscreen capable.

[0039] Fig. 3shows a flow chart of a procedure 200 for the manufacture of a glove, for example a glove corresponding to gloves 10 ( Fig. 1 ) or 100 ( Fig. 2 ).

[0040] To facilitate understanding of the method 200, the reference numerals introduced above will continue to be used.

[0041] In a first step 210 A liquid phase of polyurethane (for glove 10) or acrylonitrile butadiene rubber (for glove 100) as the respective starting mass is permeated with 0.5 volume percent of particles 20 or 120, respectively. The starting mass permeated with particles 20 or 120 is stirred until a homogeneous distribution of particles 20 or 120 is achieved.

[0042] In a further step 212 a glove 10 is coated or a glove 100 designed as a disposable glove is produced.

[0043] To coat the glove 10, a prefabricated knit liner 12 provided with a suitable coagulant is dipped into the starting material permeated with the particles 20, so that the knit liner 12 is coated with the outer layer 14 in the dipped area of ​​the glove 10. For example, the knit liner 12 is dipped three-quarters.

[0044] To produce a disposable glove, for example, corresponding to glove 100, a dipping mold coated with a suitable coagulant is dipped into the starting material permeated with particles 120, so that the outer layer 114, and thus the disposable glove, forms on the dipping mold. A porcelain mold can be used as the dipping mold.

[0045] Depending on requirements, for example depending on the desired thickness of the outer layer 14 or 114, these dipping processes can be repeated, in particular after the outer layer 14 or 114 has hardened.

[0046] Finally, especially after curing of the outer layers 14 and 114, in an optional step 214 A post-treatment of the glove 10 or 100 can be carried out. For example, the surface of the glove 10 or 100 can be post-treated by shot peening until the desired surface roughness is achieved. List of reference symbols

[0047] 10Glove 12Knit liner 14Outer layer 16Electrically conductive yarn 18Base carrier material 20Particles 100Glove 114Outer layer 120Particles 200Procedure 210Step 212Step 214Step

Claims

1. Glove (10, 100) which comprises a non-textile, polymeric outer layer (14, 114) at least in one region, in particular in an inner hand region of the glove (10, 100), the glove (10, 100) comprising a textile base layer, in particular a knitted liner (12), the base layer being electrically conductive, the base layer comprising a base carrier material (18) and an electrically conductive yarn (16), the electrically conductive yarn (16) preferably being knitted, twisted and / or spun, in particular with the base carrier material (18), characterized in that the electrically conductive yarn (16) is made of an electrically conductive material, in particular copper, steel, carbon, in particular in the form of carbon fibers, silver and / or gold, and / or is coated with the electrically conductive material, and the outer layer (14, 114) comprises electrically conductive particles (20, 120), in particular electrically conductive nanoparticles, the particles (20, 120) comprising carbon, in particular graphite and / or graphene, tungsten, stainless steel, indium tin oxide, fluorine-doped tin(IV) oxide, aluminum-doped zinc oxide and / or antimony-doped tin(IV) oxide.

2. Glove according to claim 1, characterized in that the outer layer (14, 114) is produced by dipping, printing, spraying and / or as a trimming.

3. Glove according to either of the preceding claims, characterized in that the outer layer (14, 114) comprises the particles (20, 120) at a maximum of 50 percent by volume, preferably at a maximum of 30 percent by volume.

4. Glove according to any of the preceding claims, characterized in that the glove (10, 100), in particular the outer layer (14, 114), is surface post-treated, in particular shot blasted and / or sandblasted.

5. Glove according to any of the preceding claims, characterized in that the outer layer (14, 114) has a specific electrical conductivity of at least 10-11 S / m, preferably at least 10-8 S / m.

6. Glove according to any of the preceding claims, characterized in that the glove (10, 110) is conductive, in particular ESD-capable.