DE102019118802A1 - Dissipative glove and method for manufacturing a dissipative glove - Google Patents

Abstract

The invention relates to a glove (10, 100) which has a non-textile, polymeric outer layer (14, 114) at least in one area, in particular in an inner hand area of the glove (10, 100). It is characterized in that the outer layer (14, 114) has electrically conductive particles (20, 120), in particular electrically conductive nanoparticles. The invention also relates to a method (200) for producing such a glove (10, 100). The invention makes it possible to improve the electrical conductivity properties of a glove (10, 100) of the generic type or to manufacture such a glove (10, 100) simply and inexpensively.

Description

The invention relates to a glove which has a polymeric outer layer at least in one area, in particular in an inner hand area of the glove. The invention also relates to a method for producing such a glove.

For the production of sensitive electronic (ESDS, ElectroStatic Discharge 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, ElectroStatic Discharge clothing).

To protect such components, conductive clothing, in particular ESD clothing, should enable any electrostatic charge to be continuously discharged through all of the worker's clothing. Therefore, among other things, conductive, especially ESD-capable, gloves are required.

The classification of a conductive item of clothing, in particular a glove, can be based on its volume resistance and / or its surface resistance, for example measured according to the series of standards EN 1149 or EN 61340 or according to one of the standards EN 16350 or EN 20345 and / or according to the technical rules for hazardous substances 727 Chapters 2 and 7. In particular, a glove with a volume resistance between 10 ⁰ Ω and 10 ¹¹ Ω can be classified as dissipative. A glove can be classified as ESD-capable if its volume resistance is between 10 ⁵ Ω and 3.5 × 10 ⁷ Ω.

W + R INDUSTRY GmbH, Metzingen, sells an ESD protective glove with a seamless knitted liner under the name “ECOMASTER VELOX ESD”. A yarn with carbon fibers is incorporated into the knitting liner, which makes the knitting liner conductive, especially ESD-capable. The palm of the glove is coated with a non-textile, polymeric outer layer. This outer layer is, among other things, oil-resistant and liquid-repellent, so that the glove meets the corresponding chemical requirements and can be used, for example, to handle dry and moist, in particular oiled, parts. Thanks to the conductive knitted liner, the glove is in principle also suitable for handling sensitive electronic components. However, the outer layer also determines the resulting volume resistance of the glove, so that the effective electrical conductivity of the glove has not yet been precisely defined.

The object of the present invention is therefore to offer a generic glove with improved, in particular precisely adjustable, conductivity. Furthermore, there is the task of offering a production method which enables a particularly simple and inexpensive production of such a glove.

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

The outer layer can thus also be electrically conductive. Electrostatic charges, which are formed, for example, when handling a sensitive electronic component, can be dissipated via the outer layer of the glove. This allows the sensitive electronic component to be protected against electrostatic hazards. Depending on the amount and distribution of the conductive particles introduced into the outer layer, the conductivity of the outer layer and thus that of the glove can also be precisely adjusted.

Such a glove can be touchscreen capable. In particular, the glove can be set up to enable inputs on touch-sensitive screens, for example on screens that act capacitively. For this purpose, the outer layer can extend onto one or more fingertip areas of the glove.

A particle can be understood to be a three-dimensional tiny particle which, in particular, cannot be incorporated into a macroscopic structure, for example as part of a thread, yarn or a macroscopic fiber.

A nanoparticle can be understood as a particle with a largest diameter of up to 100 nm.

The electrically conductive particles can be loosely distributed in the outer layer. In particular, they can be distributed homogeneously in the outer layer.

A material, in particular a particle, can be regarded as conductive if its specific conductivity is at least 10 ^-11 S / m, preferably at least 10 ^-8 S / m.

The glove can have one or more layers.

The glove can be designed without a textile base layer, in particular without a knitted liner. Such a glove can be a disposable glove and / or can be used as a disposable glove.

The non-textile outer layer can form the only layer in such a glove. The glove and / or the outer layer can be seamless.

Such a glove can preferably comprise latex, PVC and / or acrylonitrile-butadiene rubber. In particular, its outer layer can contain at least one of these substances. The glove can then be produced from at least one of these substances by means of coagulation of a liquid phase.

The glove can have particularly homogeneous conductivity properties if the outer layer is produced by immersion bathing and / or spraying.

Alternatively, the glove can be designed as a made-up and / or knitted glove. For this purpose, the glove can have a textile base layer, in particular a knitted liner. The outer layer can then be designed as a coating on the base layer. The base layer, in particular the knitted liner, can be seamless.

It is particularly preferred if the base layer is electrically conductive.

In order to make the base layer sufficiently conductive, it can have a base carrier material and an electrically conductive yarn. The electrically conductive yarn, in particular with the base carrier material, can preferably be knitted, twisted and / or spun. In particular, one or more electrically conductive yarns can be present. The base layer can furthermore have several different base carrier materials. The glove can thus be tailored to special 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 be a polymer, for example polyamide, in particular aramid, para-aramid and / or meta-aramid, polyester, polyvinyl chloride, polyurethane and / or polyethylene, particularly preferably a high-performance polyethylene, wool, cotton, carbon fibers, glass fibers and / or leather exhibit. The base carrier material can also be designed as synthetic leather and / or have such a material. For this purpose, the synthetic leather can be made of polyurethane and / or contain polyurethane.

The electrically conductive yarn can be made from an electrically conductive material, in particular copper, steel, carbon, in particular in the form of carbon fibers, silver and / or gold, and / or coated with the electrically conductive material.

In such a ready-made and / or knitted glove, the outer layer can be produced by immersion bathing, printing, spraying and / or as a trim. In order to produce the outer layer as a trim, it can first be produced separately and then connected to the base layer, for example sewn on. The outer layer can in particular have a homogeneous distribution of the particles.

In the case of such a glove, the outer layer can preferably comprise polyurethane, acrylonitrile-butadiene rubber, latex and / or polyvinyl chloride.

The particles can act as conductivity mediators for the outer layer. For this purpose, they can be formed from a substance with a high specific electrical conductivity and / or have such a substance. It has therefore proven particularly useful if the particles contain 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.

The outer layer can have the particles to a maximum of 50 percent by volume, preferably a maximum of 30 percent by volume. In particular, a proportion in the range from 0.5 to 3 percent by volume is conceivable. For example, particles, in particular nanoparticles, made of indium tin oxide in a proportion of 0.5 to 1 percent by volume have proven particularly useful. It is also conceivable that particles, in particular nanoparticles, have nanotubes, in particular carbon nanotubes, or that they are designed as such. The nanotubes, in particular the carbon nanotubes, can be dispersed. They can be present in a proportion of 2 to 3 percent by volume.

Surface properties of the glove can be established depending on the area of use of the glove if the glove, in particular the outer layer, has been surface-treated, in particular shot-blasted and / or sand-blasted. For example, the glove can be peened with copper balls.

The outer layer may have a conductivity of at least 10- ¹¹ S / m preferably, of at least 10 ^-8 S / m, comprising. 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 set by selecting the proportion of particles in the outer layer.

A method for producing a glove according to the invention also falls within the scope of the invention, wherein electrically conductive particles, in particular electrically conductive nanoparticles, are introduced into a starting material, in particular in the liquid phase, to produce the non-textile, polymeric outer layer. The starting material can then be conditioned in advance so that the conductivity properties of the outer layer to be produced can be set precisely and easily.

The outer layer can then be formed, for example, by coagulation, for example by means of immersion bathing.

In order to obtain the most homogeneous conductivity properties of the outer layer possible, the conductive particles can be distributed homogeneously in the starting material. The homogeneous distribution can take place together with the introduction of the particles into the starting material. As an alternative or in addition, the particles in the starting material can also be distributed in a separate step, for example by stirring the starting material.

Further features and advantages of the invention emerge 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, and from the claims.

The individual features can be implemented individually or collectively in any combination in variants of the invention. In the schematic drawing, exemplary embodiments of the invention are shown, which are explained in more detail in the following description.

• 1 einen Handschuh mit einem Strickliner;
• 2 einen Einmalhandschuh und
• 3 ein Ablaufdiagramm eines Verfahrens zur Herstellung eines Handschuhs.

Show it:

• 1 a glove with a knit liner;
• 2 a disposable glove and
• 3 a flow chart of a method for manufacturing a glove.

1 shows a glove 10 . The glove 10 has a knitting liner, especially a textile one 12 on which a non-textile, polymeric outer layer 14th , especially in the area of the palm of the glove 10 , is upset. The glove 10 is therefore multilayered.

The knitting liner 12 is seamless.

The knitting liner 12 is also conductive. For this purpose, it is made of a non-conductive yarn, for example a polyamide yarn, as the base carrier material 18th and a conductive yarn 16 knitted. The conductive yarn 16 can for example be spun from carbon fibers.

The outer layer 14th is made of polyurethane. It is made of conductive particles 20th , of which by way of example a particle with the reference number 20th is provided, interspersed homogeneously. The particles 20th are formed from indium tin oxide, in particular the particles are 20th Indium tin oxide nanoparticles. So is the outer layer too 14th electrically conductive.

The outer layer 14th is by immersion bathing on the knitting liner 12 upset.

2 shows a glove designed as a disposable glove 100 . The glove 100 has, in particular as the only layer, a non-textile, polymeric outer layer 114 on. In contrast to the glove 10 ( 1 ) it has no textile base layer, in particular no knitting liner ( 12 the 1 ), on. It is also formed by diving. For this purpose, a hand-shaped immersion form was placed in an immersion bath.

Its outer layer 114 is made of acrylonitrile butadiene rubber. In these are electrically conductive particles 120 incorporated, of which in turn, by way of example, a particle with the reference number 120 is provided. The particles 120 are in the outer layer 114 homogeneously distributed.

The conductive particles 120 are formed from indium tin oxide. The particles too 120 are designed as nanoparticles.

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

The outer layers show this 14th or. 114 a proportion of about 1 percent by volume of indium tin oxide in the form of the particles 20th or. 120 on. Alternatively or in addition, it is also conceivable that the outer layers 14th or. 114 about 2 to 3 percent by volume of particles formed as dispersed carbon nanotubes 20th or. 120 exhibit.

The two outer layers 14th , 114 cover the respective fingertips of the gloves 10 or. 100 from.

Both gloves 10 , 100 are especially touchscreen capable.

3 shows a flow chart of a method 200 for the production of a glove according to the invention, for example a glove corresponding to the gloves 10 ( 1 ) or 100 ( 2 ).

To make the process easier to understand 200 the previously introduced reference numerals are still used.

In a first step 210 becomes a liquid phase of polyurethane (for the glove 10 ) or from acrylonitrile butadiene rubber (for the glove 100 ) as the respective starting material with 0.5 volume percent of the particles 20th or. 120 interspersed. The one with the particles 20th or. 120 The mixed starting material is stirred until the particles are homogeneously distributed 20th or. 120 results.

In a further step 212 becomes a glove 10 coated or a glove designed as a disposable glove 100 manufactured.

For coating the glove 10 becomes a pre-made knitting liner 12 provided with a suitable coagulant in the with the particles 20th interspersed initial mass submerged, so that the knitting liner 12 with the outer layer 14th in the immersed area of the glove 10 is coated. For example, the knitting liner 12 three-quarters immersed.

For the production of a disposable glove, for example the glove 100 accordingly, a dipping mold coated with a suitable coagulant is inserted into the mold containing the particles 120 interspersed starting material immersed, so that the outer layer 114 and thus the disposable glove forms on the dipping mold. A porcelain mold can be used as a dipping mold.

Depending on requirements, for example depending on the desired thickness of the outer layer 14th or. 114 , these dipping processes, in particular after the respective hardening of the outer layer 14th or. 114 , be repeated.

Finally, especially after the outer layers have hardened 14th or. 114 , can be done in an optional step 214 post-treatment of the glove 10 or. 100 respectively. For example, the surface of the glove 10 or. 100 post-treated by shot peening until a desired surface roughness is obtained.

List of reference symbols

10

Glove

12

Knitting liner

14th

Outer layer

16

electrically conductive yarn

18th

Basic carrier material

20th

Particles

100

Glove

114

Outer layer

120

Particles

200

Procedure

210

step

212

step

214

step

Claims (17)

Glove (10, 100) which has a non-textile, polymeric outer layer (14, 114) at least in one area, in particular in an inner hand area of the glove (10, 100), characterized in that the outer layer (14, 114) is electrically conductive Has particles (20, 120), in particular electrically conductive nanoparticles. Glove after Claim 1 , characterized in that the glove (10, 100) is designed without a textile base layer, in particular without a knitted liner (12). Glove according to the preceding claim, characterized in that the glove (10, 100) comprises latex, PVC and / or acrylonitrile-butadiene rubber. Glove after one of the Claims 2 or 3 , characterized in that the outer layer (14, 114) is produced by immersion bathing and / or spraying. Glove after Claim 1 , characterized in that the glove (10, 100) a textile base layer, in particular a knitted liner (12). Glove according to the preceding claim, characterized in that the base layer is electrically conductive. Glove after one of the Claims 5 or 6th , characterized in that the base layer has a base carrier material (18) and an electrically conductive yarn (16), wherein the electrically conductive yarn (16), in particular with the base carrier material (18), is preferably knitted, twisted and / or is spun. Glove according to the preceding claim, characterized in that the base carrier material (18) is a polymer, for example polyamide, in particular aramid, para-aramid and / or meta-aramid, polyester, polyvinyl chloride, polyurethane and / or polyethylene, particularly preferably a high-performance polyethylene , Wool, cotton, carbon fibers, glass fibers and / or leather. Glove after one of the Claims 7 or 8th , 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. Glove after one of the Claims 5 to 9 , characterized in that the outer layer (14, 114) is produced by immersion bathing, printing, spraying and / or as a trim. Glove after one of the Claims 5 to 10 , characterized in that the outer layer (14, 114) comprises polyurethane, acrylonitrile-butadiene rubber, latex and / or polyvinyl chloride. Glove according to one of the preceding claims, characterized in that the particles (20, 120) are 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 have. Glove according to one of the preceding claims, characterized in that the outer layer (14, 114) has the particles (20, 120) at a maximum of 50 percent by volume, preferably at most 30 percent by volume. Glove according to one of the preceding claims, characterized in that the glove (10, 100), in particular the outer layer (14, 114), has been surface-treated, in particular shot-blasted and / or sand-blasted. Glove according to one 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 of at least 10 ^-8 S / m. Glove according to one of the preceding claims, characterized in that the glove (10, 110) is conductive, in particular ESD-capable. Method (200) for producing a glove (10, 100) according to one of the preceding claims, characterized in that for producing the non-textile, polymeric outer layer (14, 114), electrically conductive particles (20, 120), in particular electrically conductive nanoparticles, in a starting material, in particular in the liquid phase, can be introduced.

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