EP3831992B1 - Woven fabric and personal protective clothing - Google Patents

Description

The present invention relates to personal protective clothing made from a fabric with an outside and an inside, comprising a warp yarn and a weft yarn, such a fabric and a use of such a fabric.

Personal protective clothing is widely known. Personal protective clothing is essential in the welding industry where workers are exposed to thermal and mechanical risks. Welding has a wide range of applications, e.g. in the automotive industry, shipbuilding, civil engineering, steel construction and metallurgy. The most common types of welding used in industry are arc and oxygas. Persons performing the work in the welding industry must be protected from electrical contact, fire, explosion, thermal contact, radiation, gases and airborne particles.

There is a need to protect welders from a hazard arising from welding. The protective clothing must be comfortable for the person who wears it all day.

• geschmolzene Metallspritzer
• kurzzeitiger Kontakt mit einer Flamme
• Strahlungswärme aus einem elektrischen Bogen
• kurzer elektrischer Schlag durch versehentlichen Kontakt mit einem Stromkreis bis zu 100 V.

Personal protective clothing for welding work must comply with international standards UNE EN ISO 13688 and UNE EN ISO 11611. Such standard-compliant personal protective clothing protects against mechanical hazards, heat and fire and is intended to protect the person performing the work against the following hazards:

• molten metal spatter
• momentary contact with a flame
• Radiant heat from an electric arc
• brief electric shock from accidental contact with a circuit up to 100 V.

GB 2 559 772 A discloses a fire resistant fabric comprising an outer woven layer comprising fibers of polyparaphenylene isophthalamide (meta-aramid) or a blend of meta-aramid with polyparaphenylene terephthalamide (para-aramid) fibers; an inner woven layer comprising para-aramid fibers; and an intermediate woven layer disposed between the outer and inner woven layers and comprising a blend of wool fibers and cellulosic fibers. WO 2015/008030 A1 discloses a fire resistant fabric composed of a fabric having a face and a back, the fabric comprising meta-aramid fibers or a blend of meta-aramid with para-aramid fibers; and a mixture of cellulosic fibers and wool fibers; where the meta-aramid fibers are predominantly on the front and the blend of cellulosic fibers and wool fibers are predominantly on the back.

In the case of personal protective clothing for welding work, there is also the problem that the service life of known personal protective clothing for welding is too short, which leads to replacement costs and high waste generation.

It is therefore the object of the present invention to provide personal protective clothing which protects the person carrying out the work from the above-mentioned dangers, which is comfortable and has a long service life.

This object is achieved according to the invention by personal protective clothing made of a fabric with an outside and an inside, comprising warp yarn and weft yarn, the warp yarn containing at least one viscose material and the weft yarn containing 25% by weight ±20% to 70% by weight ±20%, based on the total amount of weft yarn, polybenzimidazole, the weft yarn predominantly forming the outside of the personal protective clothing.

If the term "approximately" is used within the scope of the invention in connection with values or value ranges, this is to be understood as meaning a tolerance range which the person skilled in the art in this field considers to be normal. In particular, a tolerance range of ±20%, preferably ±10% and more preferably ±5% is provided. As far as different ranges for amounts in relation to components and for definitions, for example of physico-chemical properties of the composition according to the invention, are given in the present invention, the lower and upper limits of the different areas in relation to the respective component and the respective definition can be combined with one another.

A fabric is a fabric that is woven in a specific way and is made up of intersecting yarns.

The inside of the garment is the side of the garment that faces the wearer and their body, while the outside of the garment is the side that faces away from the body and is orientable toward a hazard.

The inside of the fabric is the side of the fabric that faces the wearer and their body, which may also face padding, a lining or other garment, while the outside of the fabric is the side that faces away from the body and faces a Source of danger can be aligned.

A warp yarn is a thread that is stretched lengthwise in a loom during weaving. In the finished fabric, the warp yarns lie parallel to the selvedge, while so-called weft yarns run across it.

According to the invention, the warp yarn comprises a viscose material. Chemical fibers made of regenerated cellulose are referred to as viscose material, which can be produced both as filament yarn and as staple fiber. The viscose material is also used in particular for the comfort of the personal protective clothing according to the invention.

Preferably, the warp yarn comprises the viscose material in an amount in a range from 50% by weight ±20% to 92% by weight ±20% based on the total amount of the warp yarn, more preferably in a range of about 60% by weight to about 85% by weight, more preferably in a range from about 70% to about 80% by weight.

The viscose material is preferably Viscose FR. Viscose FR consists of an artificial cellulose fiber. The difference between conventional viscose and viscose FR is the Incorporation of phosphorus during extrusion of the polymer. This addition gives the fiber flame retardant properties. At the same time, this fiber is also suitable for giving the personal protective clothing according to the invention a certain level of comfort. Viscose FR is highly breathable and moisture wicking, thus reducing the thermal stress on workers in very high temperature environments.

The warp yarn preferably also comprises a material selected from a group comprising at least one polyamide and/or cotton. Polyamides are linear polymers with regularly repeating amide linkages along the main chain. Polyamides that are technically significant and suitable for the personal protective clothing according to the invention are partially crystalline thermoplastic polymers and are characterized by high strength, rigidity and toughness. Many of the properties of polyamides are largely dominated by the amide groups, which interact with each other via hydrogen bonds. Cotton is a natural fiber of plant origin with a chemical structure based on cellulose. Cotton has positive properties in terms of comfort because it is a very breathable, soft and cool fiber. Cotton and/or polyamides improve the comfort of the personal protective clothing according to the invention.

The warp yarn preferably comprises at least one polyamide in an amount in a range from 8% by weight ±20% to 50% by weight ±20%, based on the total amount of the warp yarn, more preferably in a range of about 15% by weight. % to about 45% by weight, more preferably in a range from about 20% to about 40% by weight.

The warp yarn preferably comprises at least one cotton in an amount in a range from about 8% to about 92% by weight, based on the total amount of the warp yarn, more preferably in a range from about 15% to about 85% by weight % by weight, particularly preferably in a range from about 20% by weight to about 80% by weight.

Preferably, the warp yarn comprises the viscose material in an amount in a range from 50% by weight ±20% to 92% by weight ±20% based on the total amount of the warp yarn, more preferably in a range of about 60% by weight up to about 85% by weight, particularly preferred in a range from about 70% to about 80% by weight, and at least one polyamide in an amount in a range from 8% by weight ±20% to 50% by weight ±20%, based on the Total amount of warp yarn, more preferably in a range from about 15% to about 45% by weight, most preferably in a range from about 20% to about 40% by weight.

Preferably, the warp yarn comprises the viscose material in an amount in a range from 50% by weight ±20% to 92% by weight ±20% based on the total amount of the warp yarn, more preferably in a range of about 60% by weight to about 85% by weight, more preferably in a range from about 70% to about 80% by weight, and at least one cotton in an amount in a range from about 8% to about 50% by weight. -%, based on the total amount of the warp yarn, more preferably in a range from about 15% by weight to about 45% by weight, particularly preferably in a range from about 20% by weight to about 40% by weight.

Preferably, the warp yarn comprises the viscose material in an amount in a range from 50% by weight ±20% to 92% by weight ±20% based on the total amount of the warp yarn, more preferably in a range of about 60% by weight up to about 85% by weight, particularly preferably in a range from about 70% by weight to about 80% by weight, at least one polyamide in an amount in a range from 8% by weight ±20% to 50% by weight. -% ±20%, based on the total amount of warp yarn, more preferably in a range from about 15% by weight to about 45% by weight, particularly preferably in a range from about 20% by weight to about 40% by weight. -%, and at least one cotton in an amount in a range from about 8% to about 42% by weight, based on the total amount of the warp yarn, more preferably in a range from about 15% to about 40% by weight wt%, more preferably in a range from about 20 wt% to about 35 wt%.

Preferably the warp yarn is a core spun yarn. Core-spun yarns have a two-part structure with a core and sheath. The core preferably comprises polyamide and the shell more preferably comprises viscose FR. The core preferably comprises polyamide and the sheath more preferably comprises cotton. The core preferably comprises polyamide and the shell comprises more preferably viscose FR and cotton. The core gives the personal protective clothing according to the invention high strength, rigidity and toughness. The cover provides the personal protective clothing according to the invention with a certain level of comfort while at the same time having good flame-retardant properties. The polyamide core preferably also contributes to a desired resistance during weaving for the personal protective clothing according to the invention. Polyamide increases the tear and tensile strength and improves the washing resistance of the viscose FR yarn and/or cotton.

The warp yarn is preferably created using a core spinning process. With a core spinning process, filaments can be covered with staple fibers during yarn manufacture. A ring spinning machine is modified in such a way that a core can be produced together with a shell during twisting.

The warp yarn preferably has a linear density in a range from about 15 tex to about 70 tex, more preferably from about 20 tex to about 60 tex, particularly preferably from about 25 tex to about 50 tex.

The warp yarn preferably has a tensile strength according to ISO-13934-1. in a range from about 400N to about 1500N, more preferably from about 500N to about 1300N, most preferably from about 600N to about 1100N.

The warp yarn preferably has a breaking load according to ISO-13937-2 in a range from about 15 N to about 60 N, more preferably from about 20 N to about 50 N, particularly preferably from about 30 N to about 40 N.

In the production of a textile fabric, a weft yarn is that which lies transversely to the warp threads stretched out in the loom. Weft is the term for the yarn that is pushed back and forth across the warp to create a weave.

According to the invention, the weft yarn comprises from 25% by weight ±20% to 70% by weight ±20% polybenzimidazole, preferably from about 35% by weight to about 65% by weight, more preferably from about 45% by weight to about 60% by weight based on the total amount of weft yarn.

According to the invention, the weft yarn comprises at least one polybenzimidazole. Polybenzimidazole (PBI) exhibits heat retardant properties. The oxygen index (abbreviated to LOI = Limiting Oxygen Index) is a parameter used to describe the fire behavior of plastics in particular. The LOI is measured according to ASTM D 2863-77. It defines the minimum oxygen concentration of an oxygen-nitrogen mixture under which combustion stops under test conditions. The oxygen index of PBI is higher than 50%. The melting temperature of PBI is higher than 700ºC. PBI has high tensile strength and abrasion resistance. PBI does not lose its resilience even after prolonged exposure to high temperatures. A PBI fabric has a soft touch and is flexible. A fabric made from PBI gives the personal protective clothing according to the invention a certain level of comfort. The personal protective clothing according to the invention is heat and flame retardant, in particular due to the use of PBI.

The weft yarn preferably also comprises a material selected from a group comprising wool and/or aramid fibers. Wool is a natural fiber of animal origin, particularly sheepskin, with specific qualities, lengths and fineness. It is formed from keratin, a resistant and practically insoluble protein. Wool is considered the most resistant natural fiber to burning thanks to its flame retardant composition and structure. No chemical modifications or additives are required for these properties, making it a very interesting material for clothing. Wool fibers contain a high proportion of nitrogen and water. For this reason, combustion requires a high concentration of oxygen in the environment (LOI = 25). Another advantage of this fiber is the lower smoke and gas development during combustion compared to synthetic fibers. Compared to synthetic fibers, the properties in terms of comfort are better. Aramid fibers also have some resistance to flame and heat. They are composed of aromatic polyamides, hence their name, and their chemical structure has long chains of synthetic polyamide, in which at least 85% of the amide groups (-CO-NH-) are linked directly to two aromatic groups. The molecular chains of the aramid fibers have a high orientation and crystallinity, which gives the fiber good mechanical properties such as tensile/tear strength and good dimensional stability. Wool and/or aramid fibers are heat and flame retardant and serve to ensure the mechanical resistance of the personal protective clothing according to the invention.

The weft yarn preferably comprises 10% by weight ±20% to 40% by weight ±20%, based on the total amount of the weft yarn, wool, more preferably about 15% by weight to about 35% by weight, particularly preferably about 20% to about 30% by weight.

The weft yarn preferably comprises 10% by weight ±20% to 50% by weight ±20%, based on the total amount of the weft yarn, aramid fibers, more preferably about 15% by weight to about 35% by weight, particularly preferably about 30% to about 40% by weight.

Preferably, the aramid fibers are para-aramid fibers. Para-aramids are aramids with the aromatic ring in the para position. Para means a 1,4-substitution. The advantage of para-amides is that they are tough and flame retardant. Personal protective clothing according to the invention with fibers made from para-amides is therefore particularly suitable for a person who carries out welding work.

The weft yarn is preferably a twine. A twine is a yarn made up of several yarns twisted together. A twine has a much higher breaking strength than untwisted single yarns put together. Threads are mechanically resistant. By using twine, the protective clothing according to the invention is preferably given a long service life.

The direction of twist of the weft yarn is preferably Z or S. The yarn has a direction of twist Z when the fibers in the yarn run in the direction of the slash of the letter Z when the yarn is held vertically. If it's the opposite, it's an S-twist. More preferably, the direction of rotation of the weft yarn is Z.

The weft yarn preferably has a linear density in a range from about 15 tex to about 70 tex, more preferably from about 20 tex to about 60 tex, particularly preferably from about 25 tex to about 50 tex.

The weft yarn preferably has a tensile strength according to ISO-13934-1 in a range from about 400 N to about 2100 N, more preferably from about 500 N to about 1900 N, particularly preferably from about 600 N to about 1700 N.

The warp yarn preferably has a breaking load according to ISO-13937-2 in a range from about 15 N to about 120 N, more preferably from about 20 N to about 150 N, particularly preferably from about 50 N to about 100 N.

At least one yarn is preferably dyeable. More preferably, at least one yarn can be colored, dyed white and/or black. In the personal protective clothing according to the invention, the yarns are dyed from an aesthetic point of view without impairing their properties. The warp yarn and/or the weft yarn are more preferably dyeable. Cotton and/or viscose FR are particularly preferably dyed if they are used. Viscose FR is easy to dye and has good color fastness. Cotton is relatively easy to dye and it is possible to dye it with a wide range of colors.

The present invention further relates to a fabric as described above in connection with the personal protective clothing according to the invention. The fabric according to the invention with an outside and an inside preferably comprises a warp yarn and a weft yarn, the warp yarn comprising at least one viscose material and the weft yarn comprising 25% by weight ±20% to 70% by weight ±20%, based on the total amount of the weft yarn , Polybenzimidazole, with the weft yarn predominantly forming the outside of the personal protective clothing.

The fabric is preferably produced in a twill weave. The twill weave is one of the three basic weave types for woven fabrics, along with the plain weave and the satin weave. In twill weave, the weft goes under one warp yarn, then over (at least) two warp yarns, under another, and so on. The next weft yarn shifts this rhythm one to the side and one up. A typical diagonal pattern is created, which is called twill ridge or diagonal ridge. The two sides of a twill weave fabric look different. The side on which more warp threads can be seen is called warp twill, the other correspondingly weft twill.

A weave cartridge for a weft twill is preferably used for the body weave. In the case of weft twill, the weft yarns are interwoven with the warp yarns in such a way that they largely determine the appearance and properties of the fabric surface.

Preferred is the weave pattern 3e1 b1,3 in accordance with ISO 3572. The success of the present invention will also be achieved with other weave patterns similar to the aforementioned weave pattern which result in different yarn surfaces on the inside and outside of the fabric of the personal protective clothing. In weaving, the weaving pattern is the schematic representation of a weave. When using light twill weave, one yarn is the main yarn on each side of the fabric. The weft yarn preferably forms predominantly the outside of the personal protective clothing. The warp yarn preferably predominantly forms the inside of the personal protective clothing. Within the meaning of the present invention, weave cartridges are preferably used which result in the aforementioned arrangements of the weft yarn predominantly on the outside and the warp yarn predominantly on the inside of personal protective clothing.

With a binding cartridge as defined above, yarns that are intended to ensure a comfortable feel can be predominantly on an inside of the protective clothing and fabric according to the invention and the technical yarns that have heat-retardant, flame-retardant and / or mechanically resistant properties, and in particular against electric arcs to protect, mainly on an outside of the protective clothing according to the invention and the fabric according to the invention.

The fabric preferably has a shrinkage according to ISO 5077 in a range between −10% and +10%, more preferably between −5% and +5%, particularly preferably between −3% and +3%.

The fabric preferably has a weight in a range from 200 g/m ² to about 500 g/m ² , more preferably from about 250 g/m ² to about 400 g/m ² , particularly preferably from about 300 g/m ² to about 350 g/m ² .

The fabric preferably comprises between 20 yarns/cm and 50 yarns/cm, more preferably between 25 yarns/cm and 45 yarns/cm, particularly preferably between 30 yarns/cm and 40 yarns/cm.

At least one yarn of the inventive fabric of the personal protective clothing according to the invention is preferably designed to be conductive in accordance with ISO 1149-1 to -3, i.e. they can conduct electricity, at least to a certain extent. At least one warp yarn and/or one weft yarn of the fabric of the personal protective clothing is preferably designed to be conductive. More preferably, at least about every tenth warp yarn and/or weft yarn of the fabric is conductive. More preferably, at least about every twentieth warp yarn and/or weft yarn is conductive. The advantage of using conductive threads is that electrostatic charges can be discharged. Personal protective clothing that includes conductive threads thus protects against electrostatic charges. The fabric of the personal protective clothing according to the invention is preferably conductive or at least partially conductive, in particular in such a way that electrostatic charges that can arise during welding work can be discharged.

An electrical resistance of the tissue according to ISO 1149-2 is preferably in a range from 1×10 ⁵ Ω to about 1×10 ⁹ Ω, more preferably from about 1×10 ⁶ Ω to about 1×10 ⁸ Ω, particularly preferably from about 1 × 10 ⁷ Ω to about 5 × 10 ⁷ Ω.

The conductive yarn is preferably selected from a group comprising metal, stainless steel, stainless steel, silver and/or intrinsically conductive polymers.

A fabric as described above in connection with the personal protective clothing according to the invention is preferably used as personal protective clothing, in particular in the form of jackets, trousers and overalls, for people performing metalworking and/or welding work.

An exemplary personal protective clothing according to the invention comprises a fabric according to the invention with an outer side and an inner side, the fabric comprising a warp yarn and a weft yarn, the warp yarn comprising about 50% by weight to about 92% by weight, based on the total amount of the warp yarn, viscose material , which is viscose FR, and polyamide in an amount ranging from about 8% to about 50% by weight based on the total amount of the warp yarn, and the weft yarn from about 25% to about 70% by weight wt .-%, based on the total amount of weft yarn, polybenzimidazole and about 10 wt .-% to about 40 wt .-%, based on the total amount of weft yarn, wool, wherein the weft yarn predominantly forms the outside of the personal protective clothing.

An exemplary personal protective clothing according to the invention comprises a fabric according to the invention with an outer side and an inner side, the fabric comprising a warp yarn and a weft yarn, the warp yarn comprising about 50% by weight to about 92% by weight, based on the total amount of the warp yarn, viscose material , which is viscose FR, and polyamide in an amount ranging from about 8% to about 50% by weight based on the total amount of the warp yarn, and the weft yarn from about 25% to about 70% by weight % by weight, based on the total amount of the weft yarn, polybenzimidazole and about 10% by weight to about 40% by weight, based on the total amount of the weft yarn, wool, wherein the weft yarn predominantly forms the outside of the personal protective clothing, wherein the warp yarn is a core spun yarn with polyamide as the core and viscose FR as the sheath, and the weft yarn is a twisted yarn.

An exemplary personal protective clothing according to the invention comprises a fabric according to the invention with an outer side and an inner side, the fabric comprising a warp yarn and a weft yarn, the warp yarn comprising about 50% by weight to about 92% by weight, based on the total amount of the warp yarn, of viscose material, and polyamide in an amount ranging from about 8% to about 50% by weight based on the total amount of the warp yarn and about 25% to about 70% by weight of the weft yarn based on the total amount of weft yarn, polybenzimidazole and about 10% by weight to about 40% by weight, based on the total amount of weft yarn, wool, wherein the weft yarn predominantly forms the outside of the personal protective clothing.

An exemplary personal protective clothing according to the invention comprises a fabric according to the invention having an outer side and an inner side, the fabric comprising a warp yarn and a weft yarn, the warp yarn comprising, from about 50% by weight to about 92% by weight, based on the total amount of the warp yarn viscose material and polyamide in an amount ranging from about 8% to about 50% by weight, based on the total amount of the warp yarn, and the weft yarn about 25% to about 70% by weight, based on the total amount of the weft yarn, polybenzimidazole and about 10% by weight to about 40% by weight, based on the total amount of the weft yarn, wool, the weft yarn predominantly forming the outside of the personal protective clothing, the warp yarn being a core spun - is a yarn with a polyamide core and a viscose material as the sheath, and the weft yarn is a twine.

An exemplary personal protective clothing according to the invention comprises a fabric according to the invention with an outer side and an inner side, the fabric comprising a warp yarn and a weft yarn, the warp yarn comprising about 50% by weight to about 92% by weight, based on the total amount of the warp yarn, viscose material which is viscose FR and comprises about 8% to about 50% by weight based on the total amount of the warp yarn cotton and the weft yarn about 25% to about 70% by weight based on the total amount of weft yarn comprises polybenzimidazole and about 10% to about 40% by weight, based on the total amount of weft yarn, wool, the weft yarn predominantly forming the outside of the personal protective clothing.

An exemplary personal protective clothing according to the invention comprises a fabric according to the invention with an outer side and an inner side, the fabric comprising a warp yarn and a weft yarn, the warp yarn comprising about 50% by weight to about 92% by weight, based on the total amount of the warp yarn, viscose material and about 8% to about 50% by weight, based on the total amount of the warp yarn, cotton, and the weft yarn comprises about 25% by weight to about 70% by weight, based on the total amount of the weft yarn, polybenzimidazole and from about 10% to about 40% by weight, based on the total amount of weft yarn, wool, wherein the weft yarn predominantly forms the outer surface of the personal protective clothing.

An exemplary personal protective clothing according to the invention comprises a fabric according to the invention with an outer side and an inner side, the fabric comprising a warp yarn and a weft yarn, the warp yarn comprising about 50% by weight to about 92% by weight, based on the total amount of the warp yarn, viscose material which is viscose FR, polyamide in an amount in the range of about 8% to about 50% by weight based on the total amount of warp yarn and about 8% to about 42% by weight, based on the total amount of the warp yarn, cotton, and the weft yarn comprises about 25% by weight to about 70% by weight, based on the total amount of the weft yarn, polybenzimidazole and about 10% by weight to about 40% by weight, based on the total amount of weft yarn, wool, with the weft yarn predominantly forming the outside of the personal protective clothing.

An exemplary personal protective clothing according to the invention comprises a fabric according to the invention with an outer side and an inner side, the fabric comprising a warp yarn and a weft yarn, the warp yarn comprising about 50% by weight to about 92% by weight, based on the total amount of the warp yarn, viscose material which is viscose FR, polyamide in an amount in the range of about 8% to about 50% by weight based on the total amount of warp yarn and about 8% to about 42% by weight, based on the total amount of the warp yarn, cotton, and the weft yarn comprises about 25% by weight to about 70% by weight, based on the total amount of the weft yarn, polybenzimidazole and about 10% by weight to about 40% by weight, based on the total amount of weft yarn, including wool, where the weft yarn predominantly forms the outside of the personal protective clothing, where the warp yarn is a core-spun yarn with polyamide as the core and viscose FR and cotton as the sheath, and where the weft yarn is a twine.

An exemplary personal protective clothing according to the invention comprises a fabric according to the invention with an outer side and an inner side, the fabric comprising a warp yarn and a weft yarn, the warp yarn comprising about 50% by weight to about 92% by weight, based on the total amount of the warp yarn, viscose material , Polyamide in an amount ranging from about 8% by weight to about 50% by weight based on the total amount of the warp yarn, and about 8% by weight to about 42% by weight based on the total amount of the warp yarn, cotton, and the weft yarn comprises about 25% by weight to about 70% by weight, based on the total amount of the weft yarn, polybenzimidazole and about 10% by weight to about 40% by weight, based on the total amount of Weft yarn, wool includes, the weft yarn predominantly forms the outside of the personal protective clothing.

An exemplary personal protective clothing according to the invention comprises a fabric according to the invention with an outer side and an inner side, the fabric comprising a warp yarn and a weft yarn, the warp yarn comprising about 50% by weight to about 92% by weight, based on the total amount of the warp yarn, viscose material , Polyamide in an amount ranging from about 8% by weight to about 50% by weight based on the total amount of the warp yarn, and about 8% by weight to about 42% by weight based on the total amount of the warp yarn, cotton, and the weft yarn comprises about 25% by weight to about 70% by weight, based on the total amount of the weft yarn, polybenzimidazole and about 10% by weight to about 40% by weight, based on the total amount of Weft yarn comprises wool, where the weft yarn predominantly forms the outside of the personal protective clothing, where the warp yarn is a core-spun yarn with polyamide as the core and viscose material and cotton as the cover, and where the weft yarn is a twisted yarn.

An exemplary personal protective apparel of the present invention comprises a fabric of the present invention having an outer face and an inner face, the fabric comprising a warp yarn and a weft yarn, the warp yarn comprising about 50% to about 92% by weight based on the total amount of the warp yarn, viscose material, which is viscose FR, and polyamide in an amount in a range from about 8% by weight to about 50% by weight based on the total amount of the warp yarn, and the weft yarn about 25 wt .-% to about 70 wt .-%, based on the total amount of weft yarn, polybenzimidazole and about 10 wt .-% to about 50 wt .-%, based on the total amount of weft yarn, aramid fibers, wherein the weft yarn predominantly the outside of personal protective clothing.

An exemplary personal protective clothing according to the invention comprises a fabric according to the invention with an outer side and an inner side, the fabric comprising a warp yarn and a weft yarn, the warp yarn comprising about 50% by weight to about 92% by weight, based on the total amount of the warp yarn, viscose material , which is viscose FR, and polyamide in an amount ranging from about 8% to about 50% by weight based on the total amount of the warp yarn, and the weft yarn from about 25% to about 70% by weight % by weight, based on the total amount of the weft yarn, polybenzimidazole and about 10% by weight to about 50% by weight, based on the total amount of the weft yarn, aramid fibers, the weft yarn predominantly forming the outside of the personal protective clothing, the warp yarn is a core spun yarn with polyamide as the core and viscose FR as the sheath, and the weft yarn is a twisted yarn.

An exemplary personal protective clothing according to the invention comprises a fabric according to the invention with an outer side and an inner side, the fabric comprising a warp yarn and a weft yarn, the warp yarn comprising about 50% by weight to about 92% by weight, based on the total amount of the warp yarn, viscose material , and polyamide in an amount ranging from about 8% to about 50% by weight, based on the total amount of the warp yarn, and the weft yarn about 25% to about 70% by weight, based on the total amount of the weft yarn, polybenzimidazole and about 10% by weight to about 50% by weight, based on the total amount of the weft yarn, aramid fibers, the weft yarn predominantly forming the outside of the personal protective clothing.

An exemplary personal protective clothing according to the invention comprises a fabric according to the invention with an outer side and an inner side, the fabric comprising a warp yarn and a weft yarn, the warp yarn comprising about 50% by weight to about 92% by weight, based on the total amount of the warp yarn, viscose material , and polyamide in an amount ranging from about 8% to about 50% by weight, based on the total amount of the warp yarn, and the weft yarn about 25% to about 70% by weight, based on the total amount of the weft yarn, polybenzimidazole and about 10% by weight to about 50% by weight, based on the total amount of the weft yarn, aramid fibers, the weft yarn predominantly forming the outside of the personal protective clothing, the warp yarn being a core-spun - is a yarn with a polyamide core and a viscose material as the sheath, and the weft yarn is a twine.

An exemplary personal protective clothing according to the invention comprises a fabric according to the invention with an outer side and an inner side, the fabric comprising a warp yarn and a weft yarn, the warp yarn comprising about 50% by weight to about 92% by weight, based on the total amount of the warp yarn, viscose material which is viscose FR and comprises about 8% to about 50% by weight based on the total amount of the warp yarn cotton and the weft yarn about 25% to about 70% by weight based on the total amount of weft yarn comprises polybenzimidazole and from about 10% to about 50% by weight, based on the total amount of weft yarn, aramid fibers, wherein the weft yarn predominantly forms the outer surface of the personal protective clothing.

An exemplary personal protective clothing according to the invention comprises a fabric according to the invention with an outer side and an inner side, the fabric comprising a warp yarn and a weft yarn, the warp yarn comprising about 50% by weight to about 92% by weight, based on the total amount of the warp yarn, viscose material and about 8% to about 50% by weight, based on the total amount of the warp yarn, cotton, and the weft yarn comprises about 25% by weight to about 70% by weight, based on the total amount of the weft yarn, polybenzimidazole and about 10% to about 50% by weight, based on the total amount of weft yarn, aramid fibers, wherein the weft yarn predominantly forms the outer surface of the personal protective clothing.

An exemplary personal protective clothing according to the invention comprises a fabric according to the invention with an outer side and an inner side, the fabric comprising a warp yarn and a weft yarn, the warp yarn comprising about 50% by weight to about 92% by weight, based on the total amount of the warp yarn, viscose material , which is viscose FR, and polyamide in an amount ranging from about 8% to about 50% by weight based on the total amount of the warp yarn and about 8% to about 42% by weight , based on the total amount of the warp yarn, cotton, and the weft yarn comprises about 25% by weight to about 70% by weight, based on the total amount of the weft yarn, polybenzimidazole and about 10% by weight to about 50% by weight , based on the total amount of weft yarn, comprises aramid fibers, with the weft yarn predominantly forming the outside of the personal protective clothing.

An exemplary personal protective clothing according to the invention comprises a fabric according to the invention with an outer side and an inner side, the fabric comprising a warp yarn and a weft yarn, the warp yarn comprising about 50% by weight to about 92% by weight, based on the total amount of the warp yarn, viscose material , which is viscose FR, and polyamide in an amount ranging from about 8% to about 50% by weight based on the total amount of the warp yarn and about 8% to about 42% by weight , based on the total amount of the warp yarn, cotton, and the weft yarn comprises about 25% by weight to about 70% by weight, based on the total amount of the weft yarn, polybenzimidazole and about 10% by weight to about 50% by weight , based on the total amount of weft yarn, comprises aramid fibers, with the weft yarn predominantly forming the outside of the personal protective clothing, with the warp yarn being a core-spun yarn with a polyamide core and viscose FR and cotton as the sheath, and with the weft yarn being a Z we are.

An exemplary personal protective clothing according to the invention comprises a fabric according to the invention with an outer side and an inner side, the fabric comprising a warp yarn and a weft yarn, the warp yarn comprising about 50% by weight to about 92% by weight, based on the total amount of the warp yarn, viscose material , and polyamide in an amount ranging from about 8% to about 50% by weight based on the total amount of warp yarn, and from about 8% to about 42% by weight of the total amount of the warp yarn, cotton, and the weft yarn from about 25% to about 70% by weight, based on the total amount of the weft yarn , polybenzimidazole and about 10% by weight to about 50% by weight, based on the total amount of the weft yarn, aramid fibers, wherein the weft yarn predominantly forms the outside of the personal protective clothing.

An exemplary personal protective clothing according to the invention comprises a fabric according to the invention with an outer side and an inner side, the fabric comprising a warp yarn and a weft yarn, the warp yarn comprising about 50% by weight to about 92% by weight, based on the total amount of the warp yarn, viscose material , and polyamide in an amount ranging from about 8% to about 50% by weight of the total amount of the warp yarn and about 8% to about 42% by weight of the total amount of the warp yarn, cotton, and the weft yarn comprises about 25% to about 70% by weight, based on the total amount of the weft yarn, polybenzimidazole and about 10% to about 50% by weight, based on the total amount of the weft yarn, comprises aramid fibres, the weft yarn predominantly forming the outside of the personal protective clothing, the warp yarn being a core-spun yarn with polyamide as the core and viscose material and cotton as the cover, and the weft yarn being a twisted yarn.

The present invention also relates to a fabric that is produced in a twill weave, with a weave cartridge 3e1 b1,3 being used for a weft body for the twill weave, and a use in particular in the form of jackets, trousers and overalls for metalworking and/or welding work Persons.

The present invention is explained in more detail on the basis of the following exemplary embodiment.

A fabric for personal protective clothing for people carrying out welding work was produced from a warp yarn and a weft yarn. The warp yarn comprises 79% by weight, based on the total amount of warp yarn, viscose FR and 21% by weight, based on the total amount of warp yarn, polyamide and was created using core spinning processes, with the core being made of polyamide and the sheath made of Viscose FR. The used Weft yarn comprises 50% by weight based on the total amount of the weft yarn polybenzimidazole, 30% by weight based on the total amount of the weft yarn para-aramids and 20% by weight based on the total amount of the weft yarn wool. The weft yarn is a twine. The weft yarn mainly forms the outside of the personal protective clothing. The binding cartridge is 3e1 b1,3. Testing of such a fabric showed very good properties in terms of tensile strength, tear strength, shrinkage and limited flame spread. The properties comply with the requirements of the UNE EN ISO 11611:2015 standard and are shown in Table 1 below. The durability when using this fabric in personal protective clothing for welders who regularly carry out welding work was about 18 weeks and was therefore more than twice as high as in personal protective clothing for welders known from the prior art. <b>Table 1</b> technical characteristics Values/result for example Requirement Standard ISO 11611 class 1 2nd grade Tensile Strength (N) warp yarn 1060.53 400 weft yarn 1610.71 400 Tear Strength (N) warp yarn 38.26 15 20 weft yarn 98.7 15 20 Shrinkage (%) fabric -1.5 +/- 3 limited flame spread of the fabric Inflammation up to the upper or lateral edge No no No no holes No no No no Melt No no No no Afterburning (s) (average) 0/0 <2/<2 after incandescence (s) (average) 0/0 <2/<2 Percussive impact of metal on fabric 27 15 25 Heat transfer(s) of tissue 16 ≥ 7 ≥ 16 Electrical resistance (Ω) of tissue 1×10 ⁷ > 10 ⁵

Claims (17)

1. Woven fabric having an outer side and an inner side comprising warp yarn and weft yarn, said warp yarn comprising at least one viscose material, characterized in that said weft yarn comprises from 25% by weight +/- 20% to 70% by weight +/- 20%, based on the total amount of said weft yarn, of polybenzimidazole, said weft yarn predominantly forming the outer side of said woven fabric.
2. Personal protective clothing made of a woven fabric according to claim 1, characterized in that said weft yarn predominantly forms the outer side of the personal protective clothing.
3. Personal protective clothing according to claim 2, characterized in that the fabric is made in twill weave.
4. Personal protective clothing according to claim 3, characterized in that a binding cartridge for a weft twill is used for the twill binding.
5. Personal protective clothing according to claim 4, characterized in that the binding cartridge is 3e1 b1,3 in accordance with ISO 3572.
6. Personal protective clothing according to one or more of the preceding claims 2 to 5, characterized in that the weft yarn further comprises a material selected from a group comprising wool and/or aramid fibers.
7. Personal protective clothing according to claim 6, characterized in that the weft yarn comprises 10% by weight +/- 20% to 40% by weight +/- 20%, based on the total amount of the weft yarn, of wool.
8. Personal protective clothing according to one or more of the preceding claims 6 or 7, characterized in that the weft yarn comprises 10% by weight +/- 20% to 50% by weight +/- 20%, based on the total amount of the weft yarn, of aramid fibers.
9. Personal protective clothing according to one or more of the preceding claims 6 to 8, characterized in that the aramid fibers are para-aramid fibers.
10. Personal protective clothing according to one or more of the preceding claims 2 to 9, characterized in that the weft yarn is a twisted yarn.
11. Personal protective clothing according to one or more of the preceding claims 2 to 10, characterized in that the warp yarn comprises the viscose material in an amount in a range from 50% +/- 20% to 92% +/- 20% by weight based on the total amount of said warp yarn.
12. Personal protective clothing according to one or more of the preceding claims 2 to 11, characterized in that the viscose material is viscose FR.
13. Personal protective clothing according to one or more of the preceding claims 2 to 12, characterized in that the warp yarn further comprises a material selected from a group comprising at least one polyamide and/or cotton.
14. Personal protective clothing according to claim 13, characterized in that said warp yarn comprises at least one polyamide in an amount in a range from 8% by weight +/- 20% to 50% by weight +/- 20%, based on the total amount of said warp yarn.
15. Personal protective clothing according to one or more of the preceding claims 2 to 14, characterized in that the warp yarn is a core-spun yarn.
16. Personal protective clothing according to one or more of the preceding claims 2 to 15, characterized in that at least one warp yarn and/or one weft yarn is made conductive.
17. Use of a woven fabric according to claim 1 as personal protective clothing, in particular in the form of jackets, pants and overalls, for persons performing metalworking and/or welding work.