EP3394334B1 - Nettle-based textile material - Google Patents

Nettle-based textile material Download PDF

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EP3394334B1
EP3394334B1 EP16836045.1A EP16836045A EP3394334B1 EP 3394334 B1 EP3394334 B1 EP 3394334B1 EP 16836045 A EP16836045 A EP 16836045A EP 3394334 B1 EP3394334 B1 EP 3394334B1
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knitted fabric
nettle
fabric according
fibers
fibres
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EP3394334A1 (en
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Gesine JOST
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials

Definitions

  • the present invention relates to a knitted fabric based on cellulosic fibers.
  • Natural fibers for example plant fibers such as cotton, are used extensively in the clothing industry. Since the industrialization and globalization of the fiber market, the technologies and developments for fiber production and yarn production have been focused on cotton fibers. Due to its better processability, cotton fiber has largely pushed fibers such as flax and hemp out of the fiber market. The disadvantage of cotton fibers is the poor ecological balance, since cotton usually only thrives in areas where there is also a lack of water and long transport routes from the cultivation of the cotton to the processing to the customer of the clothing are accepted.
  • Another plant-based fiber material is fibers from stinging nettles.
  • the stinging nettles belong to the group of bast fiber plants.
  • GB08244A discloses a material (fabric) woven or knitted from nettle yarn.
  • nettle yarn As examples of the nettle yarn, ramie, chinese grass, Indian nettle, etc. are given. These fibers are the typical fibers originating from East Asia. Ramie is also known as Chinese grass (see Wikipedia, keyword: “Chinese grass”). The plants mentioned are not native to Europe.
  • stinging nettle Urtica Dioica
  • This plant has the advantage that it grows where people leave their mark, namely on roadsides, walls, ruins, meadows, on wasteland and in human settlements. She is mostly in European area cultivated and reaches a size between 1.5 m up to 3 m in fiber cultivation.
  • the nettle fiber is a well-known fiber plant, industrial processing has been difficult so far, so that materials based on nettle fibers are hardly known. So far, the fibers have only been spun in a mixed process with cotton or a cellulose base.
  • the object of the present invention was therefore to provide a textile material that is produced on the basis of renewable raw materials such as nettle fibers and has a better ecological balance sheet than conventional cotton fibers.
  • the subject matter of the present invention is accordingly a knitted fabric in the form of a knitted fabric, which comprises mixed fibers of 30 to 70%, based on the total fiber content, fibers based on Urtica Dioica and 70 to 30%, based on the total fiber content, viscose fibers.
  • the knitted fabric according to the invention is distinguished in many respects, on the one hand it is produced on the basis of materials from renewable raw materials.
  • the nettle fiber is characterized by a good ecological balance, since the nettle can grow almost anywhere in the world under any climatic conditions; long transport routes are not necessary.
  • the other properties of the stinging nettle such as heat transfer resistance and water vapor resistance as well as air permeability, are well above the values of other materials, so that the wearing comfort of the knitted fabric according to the invention is better than that of other materials based on plant fibers.
  • the fiber material itself is a fiber material that comprises mixed fibers of 30 to 70%, based on the total fiber content, fibers based on Urtica Dioica and 70 to 30%, based on the total fiber content, viscose fibers, in particular 30 to 50% fibers Based on Urtica Dioica and 70 to 50% viscose fibers.
  • the stinging nettle is selected from Urtica Dioica (European stinging nettle), which has great assets from an ecological point of view.
  • the fiber material is a mixed fiber made from stinging nettle and viscose, with a mixed fiber made from stinging nettle and modal having proven to be particularly suitable.
  • the material fibers are knitted.
  • the nettle fibers are preferably used in the form of a yarn with a fineness of between 25 and 50 Nm. This yarn can be combined with other fibers be combined. A yarn with a fineness of between 10 and 15 Nm is usually processed in the end product.
  • the stitch density p is between 5 and 10 g/m 2 .
  • a knitted fabric according to the present invention which has a heat transfer resistance of ⁇ 0.03 m 2 ⁇ K/W, offers a comfortable fit at all temperatures.
  • Clothing that has a knitted fabric with a water vapor transmission rate ⁇ 40% is also suitable for sportswear, i.e. when the wearer sweats and water or water vapor has to be released and transported to the outside. Knitted fabrics that have a water vapor transmission resistance of ⁇ 3.8 m 2 ⁇ Pa/W are also particularly suitable here.
  • the knitted fabric according to the invention has an air permeability of ⁇ 2000 l/m 2 /Pa.
  • Fibers having the composition shown in Table 1 were processed into a knitted fabric.
  • the individual fibers or fiber types were combined in such a way that the fineness of the yarn to be processed was approx. 14 Nm.
  • the yarn was knitted in a hand knitting machine from H. Stoll AG & Co. KG of the type E7/107 with the stitch type R/R (see Table 1).
  • the water vapor resistance R et describes the moisture behavior of a textile and is a criterion for the physiological evaluation of clothing.
  • the textile sample represents a membrane between two spaces with different moisture content.
  • the water vapor transmission rate (in %) and the water vapor transmission resistance (m 2 ⁇ Pa/W) are measured once.
  • Water vapor permeability Wd is the characteristic property of a textile fabric or textile material structure, which depends on the water vapor resistance and the temperature according to the equation shown below.
  • Wd 1 / Ret ⁇ ⁇ tom
  • the measurement sample lies flat on % like a membrane
  • Air permeability (similar to DIN EN ISO 2062)
  • the water beading effect is tested with the so-called spray test. To do this, a specified amount of distilled water with a temperature between 20 and 27 °C is rained onto the surface of the textile from a defined distance. For this purpose, the sample is at a 45° angle to the water rain. The degree of wetting is assessed.
  • the assessment is based on ISO ISO 5: No sticking or wetting of the surface.
  • ISO 4 Slight, randomly distributed sticking or wetting of the surface
  • ISO 3 Wetting the surface at the spray points.
  • ISO 2 Partial wetting of the entire surface.
  • ISO1 Complete wetting of the entire surface.
  • the laboratory samples were all knitted in the format 50cm ⁇ 50cm.
  • the measurement samples were cut to the format 30 cm ⁇ 30 cm and attached to each side with adhesive tape.
  • the measurement sample lay flat and without creases directly on the measuring head, the measuring head thus simulating lying flat on the skin.
  • 9 measurement samples each one measurement air temperature 20 °C, relative humidity 65%, temp, measuring head 35 °C.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Of Fabric (AREA)

Description

Die vorliegende Erfindung betrifft einen Maschenstoff in Form eines Gestrickes auf Basis von Zellulosefasern.The present invention relates to a knitted fabric based on cellulosic fibers.

In der Bekleidungsindustrie werden Naturfasern, beispielsweise Pflanzenfasern wie Baumwolle, in großem Umfang eingesetzt. Seit der Industrialisierung und Globalisierung des Fasermarktes hat man die Technologien und Entwicklungen zur Fasergewinnung und Garnherstellung auf die Baumwollfasern fokussiert. Die Baumwollfaser hat aufgrund der besseren Verarbeitbarkeit Fasern wie Flachs und Hanf weitgehend vom Fasermarkt verdrängt. Nachteilig an Baumwollfasern ist die schlechte Ökobilanz, da Baumwolle in der Regel nur in Gebieten gedeiht, in denen gleichzeitig auch Wassermangel herrscht und weite Transportwege von der Aufzucht der Baumwolle über die Verarbeitung hin zum Kunden der Bekleidung in Kauf genommen werden.Natural fibers, for example plant fibers such as cotton, are used extensively in the clothing industry. Since the industrialization and globalization of the fiber market, the technologies and developments for fiber production and yarn production have been focused on cotton fibers. Due to its better processability, cotton fiber has largely pushed fibers such as flax and hemp out of the fiber market. The disadvantage of cotton fibers is the poor ecological balance, since cotton usually only thrives in areas where there is also a lack of water and long transport routes from the cultivation of the cotton to the processing to the customer of the clothing are accepted.

Ein weiteres Fasermaterial auf pflanzlicher Basis sind Fasern aus Brennnesseln. Die Brennnesseln gehören zur Gruppe der Bastfaserpflanzen.Another plant-based fiber material is fibers from stinging nettles. The stinging nettles belong to the group of bast fiber plants.

Di Virgilio Nicola et al. beschreiben in Industrial Crops and Products (68), Seiten 42-49, "The potential of stinging nettle (Urtica dioica L.) as a crop with multiple uses " die Möglichkeiten, die Urtica dioica auch in Italien anzubauen und geben einen Überblick über die erzielte Faserausbeute sowie über die Fasereigenschaften, wie Faserdurchmesser und spezifisches Gewicht der Faser. Di Virgilio Nicola et al. describe in Industrial Crops and Products (68), pages 42-49, "The potential of stinging nettle (Urtica dioica L.) as a crop with multiple uses " the possibilities of growing Urtica dioica in Italy and give an overview of the fiber yield achieved and the fiber properties, such as fiber diameter and specific weight of the fiber.

GB 08244 A offenbart ein Material (Textilien) die aus Nesselgarn gewebt oder gestrickt sind. GB08244A discloses a material (fabric) woven or knitted from nettle yarn.

Als Beispiele für das Nesselgarn werden Ramie, Chinagras, indische Nessel usw. gegeben. Bei diesen Fasern handelt es sich um die typischen aus dem ostasiatischen Raum stammenden Fasern. Ramie wird auch als Chinagras bezeichnet (s. Wikipedia, Stichwort: "Chinagras"). Die genannten Pflanzen sind in Europa nicht heimisch.As examples of the nettle yarn, ramie, chinese grass, Indian nettle, etc. are given. These fibers are the typical fibers originating from East Asia. Ramie is also known as Chinese grass (see Wikipedia, keyword: "Chinese grass"). The plants mentioned are not native to Europe.

Für die Herstellung von textilen Materialien auf Basis von Brennnesseln hat sich insbesondere die sogenannte Große Brennnessel (Urtica Dioica), auch Gemeine Brennnessel genannt, als geeignet erwiesen. Diese Pflanze hat den Vorteil, dass sie dort wächst, wo die Menschen ihre Spuren hinterlassen, nämlich an Wegrändern, Mauern, Ruinen, Wiesen, auf Brachland und in menschlichen Siedlungen. Sie ist vorwiegend im europäischen Raum kultiviert und erreicht eine Größe zwischen 1,5 m bis zu 3 m in der Faserzucht. Die Brennnesselfaser ist zwar eine altbekannte Faserpflanze, die industrielle Verarbeitung war bisher schwierig, so dass Materialien auf Basis von Brennnesselfasern bisher kaum bekannt sind. Bisher werden die Fasern nur in Mischverfahren mit Baumwolle oder einer Zellulosebasis versponnen.The so-called stinging nettle (Urtica Dioica), also known as common nettle, has proven to be particularly suitable for the production of textile materials based on stinging nettles. This plant has the advantage that it grows where people leave their mark, namely on roadsides, walls, ruins, meadows, on wasteland and in human settlements. She is mostly in European area cultivated and reaches a size between 1.5 m up to 3 m in fiber cultivation. Although the nettle fiber is a well-known fiber plant, industrial processing has been difficult so far, so that materials based on nettle fibers are hardly known. So far, the fibers have only been spun in a mixed process with cotton or a cellulose base.

Der vorliegenden Erfindung lag somit die Aufgabe zugrunde, ein textiles Material zur Verfügung zu stellen, das auf Basis von nachwachsenden Rohstoffen, wie Brennnesselfasern, hergestellt wird und eine im Vergleich zu üblichen Baumwollfasern bessere Ökobilanz aufweist.The object of the present invention was therefore to provide a textile material that is produced on the basis of renewable raw materials such as nettle fibers and has a better ecological balance sheet than conventional cotton fibers.

Gegenstand der vorliegenden Erfindung ist demgemäß ein Maschenstoff in Form eines Gestrickes, das Mischfasern aus 30 bis 70% , bezogen auf den Gesamtfaseranteil, Fasern auf Basis von Urtica Dioica und 70 bis 30%, bezogen auf den Gesamtfaseranteil, Viskose-Fasern, umfasst..The subject matter of the present invention is accordingly a knitted fabric in the form of a knitted fabric, which comprises mixed fibers of 30 to 70%, based on the total fiber content, fibers based on Urtica Dioica and 70 to 30%, based on the total fiber content, viscose fibers.

Der erfindungsgemäße Maschenstoff zeichnet sich in vielerlei Hinsicht aus, zum einen ist er auf Basis von Materialien aus nachwachsenden Rohstoffen hergestellt. Zudem zeichnet die Brennnesselfaser durch eine gute Ökobilanz aus, da die Brennnessel nahezu überall auf der Welt unter beliebigen klimatischen Bedingungen wachsen kann; lange Transportwege sind nicht nötig. Auch die weiteren Eigenschaften der Brennnessel, wie Wärmedurchgangswiderstand und Wasserdampfdurchgangswiderstand sowie Luftdurchlässigkeit liegen deutlich über den Werten anderer Materialien, so dass auch der Tragekomfort des erfindungsgemäßen Maschenstoffes besser ist als der von anderen Materialien auf Basis von Pflanzenfasern.The knitted fabric according to the invention is distinguished in many respects, on the one hand it is produced on the basis of materials from renewable raw materials. In addition, the nettle fiber is characterized by a good ecological balance, since the nettle can grow almost anywhere in the world under any climatic conditions; long transport routes are not necessary. The other properties of the stinging nettle, such as heat transfer resistance and water vapor resistance as well as air permeability, are well above the values of other materials, so that the wearing comfort of the knitted fabric according to the invention is better than that of other materials based on plant fibers.

Das Fasermaterial selbst ist ein Fasermaterial, das Mischfasern aus 30 bis 70% , bezogen auf den Gesamtfaseranteil, Fasern auf Basis von Urtica Dioica und 70 bis 30%, bezogen auf den Gesamtfaseranteil, Viskose-Fasern, umfasst, insbesondere 30 bis 50% Fasern auf Basis von Urtica Dioica und 70 bis 50% Viskose-Fasern. Die Brennnessel ist ausgewählt aus Urtica Dioica (europäische Brennnessel), die aus ökologischer Sicht große Vorzüge hat . Das Fasermaterial ist eine Mischfaser aus Brennnessel und Viskose, wobei eine Mischfaser aus Brennnessel und Modal sich als besonders geeignet erwiesen hat.The fiber material itself is a fiber material that comprises mixed fibers of 30 to 70%, based on the total fiber content, fibers based on Urtica Dioica and 70 to 30%, based on the total fiber content, viscose fibers, in particular 30 to 50% fibers Based on Urtica Dioica and 70 to 50% viscose fibers. The stinging nettle is selected from Urtica Dioica (European stinging nettle), which has great assets from an ecological point of view. The fiber material is a mixed fiber made from stinging nettle and viscose, with a mixed fiber made from stinging nettle and modal having proven to be particularly suitable.

Zur Herstellung des erfindungsgemäßen Maschenstoffes werden die Materialfasern verstrickt. Vorzugsweise werden die Brennnesselfasern in Form eines Garns mit einer Feinheit zwischen 25 und 50 Nm eingesetzt. Dieses Garn kann mit anderen Fasern kombiniert werden. Im Endprodukt wird üblicherweise ein Garn mit einer Feinheit zwischen 10 und 15 Nm verarbeitet. Die Maschendichte p liegt zwischen 5 und 10 g/m2.To produce the knitted fabric according to the invention, the material fibers are knitted. The nettle fibers are preferably used in the form of a yarn with a fineness of between 25 and 50 Nm. This yarn can be combined with other fibers be combined. A yarn with a fineness of between 10 and 15 Nm is usually processed in the end product. The stitch density p is between 5 and 10 g/m 2 .

Ein Maschenstoff gemäß der vorliegenden Erfindung, der einen Wärmedurchgangswiderstand von ≥ 0,03 m2xK/W aufweist, bietet einen angenehmen Tragekomfort bei allen Temperaturen.A knitted fabric according to the present invention, which has a heat transfer resistance of ≧0.03 m 2 ×K/W, offers a comfortable fit at all temperatures.

Bekleidung, die einen Maschenstoff mit einem Wasserdampfdurchgang ≥ 40 % aufweist, ist auch für Sportbekleidung geeignet, also wenn der Träger schwitzt und Wasser bzw. Wasserdampf abgegeben und nach außen transportiert werden muss. Hier eignen sich auch insbesondere Maschenstoffe, die einen Wasserdampfdurchgangswiderstand ≥ 3,8 m2 × Pa/W aufweisen.Clothing that has a knitted fabric with a water vapor transmission rate ≥ 40% is also suitable for sportswear, i.e. when the wearer sweats and water or water vapor has to be released and transported to the outside. Knitted fabrics that have a water vapor transmission resistance of ≧3.8 m 2 ×Pa/W are also particularly suitable here.

In einer weiteren bevorzugten Ausführungsform weist der erfindungsgemäße Maschenstoff eine Luftdurchlässigkeit ≥ 2000 l/m2/Pa aufweist.In a further preferred embodiment, the knitted fabric according to the invention has an air permeability of ≧2000 l/m 2 /Pa.

Beispieleexamples

Es wurden Fasern mit der in Tabelle 1 dargestellten Zusammensetzung zu einem Maschenstoff verarbeitet. Die einzelnen Fasern bzw. Faserarten wurden so kombiniert, dass die Feinheit des zu verarbeitenden Garnes ca. 14 Nm betrug. Das Garn wurde in einer Handstrickmaschine der Fa. H. Stoll AG & Co. KG vom Typ E7 / 107 im Maschentyp R/R verstrickt (s. Tabelle 1). Tabelle 1 Strickprobe Mischverhältnis % Anzahl Proben Anzahl Garne Feinheit NM Stricknadeln Breite Reihen Probenbreite verstrickt Ø Schrumpf % Modal/Brennnessel 50/50 5 2 28/1 180 65,6 cm 410 44,0 cm 32,93 Modal/Brennnessel 70/30 5 2 28/1 180 65,6 cm 410 41,3 cm 37,04 Tencel/Leinen 70/30 4 3 40/1 180 65,6 cm 410 45,8 cm 30,18 Modal 100 4 3 40/1 180 65,6 cm 410 34,3 cm 48,12 Modal/Baumwolle 70/30 4 3 40/1 180 65,6 cm 410 35,4 cm 46,04 Modal/Baumwolle 30/70 4 3 40/1 180 65,6 cm 410 36,0 cm 45,12 Baumwolle 100 4 3 40/1 180 65,6 cm 410 38,2 cm 41,77 Polyester / / / / / / / / / Fibers having the composition shown in Table 1 were processed into a knitted fabric. The individual fibers or fiber types were combined in such a way that the fineness of the yarn to be processed was approx. 14 Nm. The yarn was knitted in a hand knitting machine from H. Stoll AG & Co. KG of the type E7/107 with the stitch type R/R (see Table 1). Table 1 knitting sample Mixing ratio % number of samples number of yarns Fineness NM knitting needles Broad rows Sample width knitted Ø shrinkage % Modal/nettle 50/50 5 2 28/1 180 65.6 cm 410 44.0 cm 32.93 Modal/nettle 70/30 5 2 28/1 180 65.6 cm 410 41.3 cm 37.04 Tencel/linen 70/30 4 3 40/1 180 65.6 cm 410 18" 30.18 Modal 100 4 3 40/1 180 65.6 cm 410 34.3 cm 48:12 modal/cotton 70/30 4 3 40/1 180 65.6 cm 410 35.4 cm 46.04 modal/cotton 30/70 4 3 40/1 180 65.6 cm 410 36.0 cm 45:12 Cotton 100 4 3 40/1 180 65.6 cm 410 15" 41.77 polyester / / / / / / / / /

Wasserdampfdurchgangswiderstand Ret (analog DIN EN ISO 31092) Der Wasserdampfdurchgangswiderstand R et beschreibt das Feuchteverhalten eines Textils und ist zur bekleidungsphysiologischen Bewertung ein Kriterium. Die Textilprobe stellt eine Membran zwischen zwei Räumen mit unterschiedlichen Feuchtegehalt. Es wird einmal der Wasserdampfdurchgang (in %) und einmal der Wasserdampfdurchgangswiderstand (m2 × Pa/W) gemessen. Water vapor resistance Ret (analogous to DIN EN ISO 31092) The water vapor resistance R et describes the moisture behavior of a textile and is a criterion for the physiological evaluation of clothing. The textile sample represents a membrane between two spaces with different moisture content. The water vapor transmission rate (in %) and the water vapor transmission resistance (m 2 ×Pa/W) are measured once.

Das Textil wird in einen geschlossenen Raum in einer Klemmvorrichtung befestigt. Ret bestimmt sich nach Ret = pm − pa · A / H − Δ He − Ret 0

Figure imgb0001
The textile is fixed in a closed space in a clamping device. Ret determines himself Ret = pm − pa · A / H − Δ hey − Ret 0
Figure imgb0001

Wasserdampfdurchlässigkeit Wd ist die charakteristische Eigenschaft eines textilen Flächengebildes bzw. textilen Materialaufbaus, die nach der nachfolgend dargestellten Gleichung vom Wasserdampfdurchgangswiderstand und der Temperatur abhängt. Wd = 1 / Ret · μ Tm

Figure imgb0002
Water vapor permeability Wd is the characteristic property of a textile fabric or textile material structure, which depends on the water vapor resistance and the temperature according to the equation shown below. Wd = 1 / Ret · µ tom
Figure imgb0002

Prüfklima 20 °C, Lufttemperatur: 20 °C, Messkopftemperatur: 35 °C, Relative Feuchte 65. Die Messprobe liegt wie eine Membran flach auf %Test climate 20 °C, air temperature: 20 °C, measuring head temperature: 35 °C, relative humidity 65. The measurement sample lies flat on % like a membrane

Prüfbericht gemäß internationaler Norm (ISO / DIS 9920 : 1991) Wasserdampfdurchgangswiderstand: m2 · Pa/W Modal/Brennnessel 50 % / 50 % 28/1 Nm 2x 4 Modal/Brennnessel 70 % / 30 % 28/1 Nm 2x 4,6 Modal 100 % 40/1 Nm 3x 5,3 BW / Modal 70 % / 30 % 40/1 Nm 3x 5,2 BW / Modal 30 % / 70 % 40/1 Nm 3x 5,5 Baumwolle 100 % 40/1 Nm 3x 5,1 Tencel/Leinen 70 % / 30 % 40/1 Nm 3x 4,5 Test report according to international standard (ISO / DIS 9920 : 1991) water vapor resistance: m 2 Pa/W Modal/nettle 50% / 50% 28/1 Nm 2x 4 Modal/nettle 70% / 30% 28/1 Nm 2x 4.6 Modal 100% 40/1 Nm 3x 5.3 BW / Modal 70% / 30% 40/1 Nm 3x 5.2 BW / Modal 30% / 70% 40/1 Nm 3x 5.5 cotton 100% 40/1 Nm 3x 5.1 Tencel/Linen 70% / 30% 40/1 Nm 3x 4.5

Die Ergebnisse sind in den Figuren 1 und 2 dargestellt.The results are in the figures 1 and 2 shown.

Luftdurchlässigkeit (analog DIN EN ISO 2062) Air permeability (similar to DIN EN ISO 2062)

Voraussetzungen/Durchführung:
Die Messung der Luftdurchlässigkeit erfolgt gemäß DIN EN ISO 2062:2009, d. h. ISO 9237 : 1 995.
Eine Probe mit einer Prüffläche von 20 cm2 wird hier in eine runde Klemmvorrichtung befestigt. Die Luftdurchlässigkeit wird in einer festen Fläche im Sekundentakt gemessen.
Anzahl der geprüften Messproben = 7 verschiedene Proben
Differenzdruck 100 Pa
Vorangleichen auf Normalklima = 20 °C
l/m2/Pa Modal/Brennnessel 50 % / 50 % 2390 Modal/Brennnessel 70 % / 30 % 2450 Modal 100 % 1320 Modal / BW 70 % / 30 % 1360 Modal / BW 30 % / 70 % 1310 Baumwolle 1 00 % 1300 Tencel/Leinen 70 % / 30 % 1950 Prerequisites/implementation:
Air permeability is measured in accordance with DIN EN ISO 2062:2009, ie ISO 9237:1995.
A sample with a test area of 20 cm 2 is fixed in a round clamping device. The air permeability is measured in a fixed area every second.
Number of tested measurement samples = 7 different samples
Differential pressure 100 Pa
Pre-adjustment to normal climate = 20 °C
l/ m2 /Pa Modal/nettle 50% / 50% 2390 Modal/nettle 70% / 30% 2450 Modal 100% 1320 Modal / BW 70% / 30% 1360 Modal / BW 30% / 70% 1310 cotton 100% 1300 Tencel/Linen 70% / 30% 1950

Die Ergebnisse sind in Figur 3 dargestellt.The results are shown in Figure 3. Wasserabperleffekt (analog DIN EN 24920:1992) Water beading effect (similar to DIN EN 24920:1992)

Der Wasserabperleffekt wird mit dem sogenannten Spraytest getestet. Dazu wird eine festgelegte Menge an destilliertem Wasser mit einer Temperatur zwischen 20 und 27 °C aus einer definierten Distanz auf die Oberfläche der textilen Fläche geregnet. Die Probe liegt hierfür im 45°-Winkel zu dem Wasserregen. Der Grad der Benetzung wird beurteilt.The water beading effect is tested with the so-called spray test. To do this, a specified amount of distilled water with a temperature between 20 and 27 °C is rained onto the surface of the textile from a defined distance. For this purpose, the sample is at a 45° angle to the water rain. The degree of wetting is assessed.

Die Beurteilung erfolgt nach ISO ISO 5: Kein Anhaften oder Benetzen der Oberfläche. ISO 4: Geringes, zufällig verteiltes Anhaften oder Benetzen der Oberfläche ISO 3: Benetzen der Oberfläche an den Sprühpunkten. ISO 2: Teilweises Benetzen der gesamten Oberfläche. ISO 1: Vollständiges Benetzen der gesamten Oberfläche. The assessment is based on ISO ISO 5: No sticking or wetting of the surface. ISO 4: Slight, randomly distributed sticking or wetting of the surface ISO 3: Wetting the surface at the spray points. ISO 2: Partial wetting of the entire surface. ISO1: Complete wetting of the entire surface.

Für den photographischen Effekt wurde gefärbtes Wasser verwendet. Die Ergebnisse sind in Figur 4 dargestellt.Colored water was used for photographic effect. The results are in figure 4 shown.

Wärmedurchgangswiderstand (DIN EN 31092:2013-01" "EN 31092:1993 + A1:2012 (D))Thermal resistance (DIN EN 31092:2013-01""EN 31092:1993 + A1:2012 (D))

Die Laborproben wurden alle im Format 50cm × 50cm gestrickt. Die Messproben wurden auf das Format 30cm × 30cm zugeschnitten und jeweils an den Seiten mit einem Klebeband befestigt. Die Messprobe lag flach und ohne Falten direkt auf dem Messkopf auf, der Messkopf simulierte so das flache Aufliegen auf der Haut. 9 Messproben je eine Messung Lufttemperatur 20 °C, Relative Feuchte 65%, Temp, Messkopf 35 °C.The laboratory samples were all knitted in the format 50cm × 50cm. The measurement samples were cut to the format 30 cm × 30 cm and attached to each side with adhesive tape. The measurement sample lay flat and without creases directly on the measuring head, the measuring head thus simulating lying flat on the skin. 9 measurement samples each one measurement air temperature 20 °C, relative humidity 65%, temp, measuring head 35 °C.

Die Ergebnisse sind in Figur 5 dargestellt.The results are in figure 5 shown.

Claims (8)

  1. Knitted fabric in the form of a knit, characterized in that the knit comprises blend fibres made up of 30% to 70%, based on the total fibre fraction, of fibres based on Urtica dioica and 70% to 30%, based on the total fibre fraction, of viscose fibres.
  2. Knitted fabric according to Claim 1, characterized in that the knitted fabric comprises blend fibres made up of 30% to 50%, based on the total fibre fraction, of fibres based on Urtica dioica and 70% to 50%, based on the total fibre fraction, of viscose fibres.
  3. Knitted fabric according to either of Claims 1 and 2, characterized in that the stitch density ρ is between 5 and 10 g/m2.
  4. Knitted fabric according to any of Claims 1 to 3, characterized in that yarn made of common nettle fibres with a linear density of between 25 and 50 Nm is used.
  5. Knitted fabric according to any of Claims 1 to 4, characterized in that the thermal transmission resistance is ≥ 0.03 m2xK/W (in analogy to DIN EN 31092:2013-01, EN 31092:1993 + A1:2012 (D)).
  6. Knitted fabric according to any of Claims 1 to 5, characterized in that the water vapour transmission is ≥ 40%, measured using the method described in the present examples.
  7. Knitted fabric according to any of Claims 1 to 6, characterized in that the water vapour transmission resistance is ≥ 3.8 m2xpa/W (in analogy to DIN EN ISO 31092) .
  8. Knitted fabric according to any of Claims 1 to 7, characterized in that the air permeability is ≥ 1900 l/m2/Pa (in analogy to DIN EN ISO 2062:2009).
EP16836045.1A 2015-12-23 2016-12-23 Nettle-based textile material Active EP3394334B1 (en)

Applications Claiming Priority (2)

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DE102015122728.2A DE102015122728A1 (en) 2015-12-23 2015-12-23 Textile material based on nettle
PCT/DE2016/100614 WO2017108036A1 (en) 2015-12-23 2016-12-23 Nettle-based textile material

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EP3394334B1 true EP3394334B1 (en) 2022-11-16

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DE202019103174U1 (en) 2019-06-06 2019-06-14 Mattes & Ammann Gmbh & Co. Kg nettle fibers
WO2024094714A1 (en) 2022-11-01 2024-05-10 Nettle Circle Gmbh Method for separating plant fibres from nettle plants, use thereof, and a device for same

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EP3394334A1 (en) 2018-10-31
DK3394334T3 (en) 2023-02-20
DE102015122728A1 (en) 2017-06-29

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