RU2402648C1 - Heat resistant, fire resistant and antistatic yarn for woven and jersey articles - Google Patents

Abstract

FIELD: textile, paper.

SUBSTANCE: yarn for woven and jersey articles is characterized by the following composition of components, wt %: - heat resistant polyamide imide or polymethaaramide fibre 45-55; - heat resistant polyparaaramide fibre 2-4; - antistatic fibre 1-2; - fire resistant viscose fibre - balance. Polyamide imide fibre is represented by Kermel fibre, polymethaaramide fibre - by Nomex, Conex or Newstar, polyparaaramide fibre - by Kevlar or Tvaron, antistatic fibre - by Bekinox, fire resistant viscose fibre - by Lenzing or Avylon.

EFFECT: invention makes it possible to reduce heat shrinkage and specific surface electric resistance of yarn, to increase its oxygen index, and to expand its functional capabilities.

1 tbl, 5 cl

Description

The invention relates to the textile industry, namely to the production of yarn having both heat resistance, fire resistance and antistatic properties, and can be used to obtain woven and knitted products, in particular protective clothing, ensuring the safety of work and service (military uniforms, protective clothing of lifeguards, firefighters, electricians, metallurgists, welders, etc.).

Known multifunctional yarn with antimicrobial, antistatic and anti-odor properties. To obtain materials with the indicated properties, the following fibers are used: cotton, polyamide, polyester, woolen, Nomex, Kevlar and elastic (polyurethane fiber). A disadvantage of the known yarn and the materials obtained from it is the lack of flame retardant and heat-resistant properties, since mainly mixtures of combustible, non-heat-resistant fibers are used. The presence in the material of yarn from a mixture of Nomex, Kevlar and antistatic fiber (Table II) does not provide a material with fire retardant properties. In addition, to impart antistatic properties to the composition of the yarn, an excessively large amount of antistatic fiber (5%) is introduced, which significantly increases its cost / Published application US No. 2007/0148449, D02G 3/02, 2007 /

Known fire-resistant yarn for woven and knitted products with high fire-retardant performance obtained by introducing into its composition thermally oxidized polyacrylonitrile fiber. However, the resulting yarn does not have antistatic properties. The minimum linear density of the resulting yarn is 29 tex, but a thinner yarn (for example, 16.7 tex) with oxidized polyacrylonitrile fiber cannot be obtained, which limits the functionality of the yarn. In addition, it is known that yarn containing oxidized polyacrylonitrile fiber is characterized by low abrasion resistance, which is especially important when using materials for the manufacture of clothing / patent RU No. 2286410, D02G 3/04, 2006 /.

Fire-resistant yarn made of flame-retardant polyester fiber or its mixture with heat-resistant CBM, Rusar and Armos fibers is also known, which does not have antistatic properties and heat resistance due to the presence of a thermoplastic polyester fiber in its composition. The materials obtained from the specified yarn cannot be used for the manufacture of protective clothing that protects against thermal risks and especially from the effects of the electric arc / RU patent No. 2288307, D02G 3/04, 2006 /.

An object of the present invention is to provide an inexpensive yarn with the best combination of thermoprotective, fire retardant and antistatic properties.

The technical result consists in reducing heat shrinkage and surface specific electrical resistance of the yarn, increasing the oxygen index and expanding its functionality.

The problem is solved, and the technical result is achieved due to the fact that heat-resistant, fire-resistant and antistatic yarn for woven and knitted products is characterized by the following composition of components, wt.%:

heat resistant polyamide imide or

polymetharamide fiber 45-55 heat resistant polyparaaramide fiber 2-4 antistatic fiber 1-2 flame retardant viscose fiber rest.

It is preferable that Kermel fiber is used as polyamidoimide fiber, Nomex, Koneks, or Newstar fiber is used as polymearamide fiber, Kevlar or Twaron is used as polypararamid fiber, Beckinox is used as antistatic fiber, and Lenzing or Avilon is used as flame retardant viscose fiber.

The introduction of 1-2 wt.% Antistatic fiber into the composition of the yarn is due to the fact that when the amount of antistatic fiber in the yarn is reduced to less than 1 wt.%, The necessary antistatic properties are not achieved, and the introduction of more than 2 wt.% Significantly increases the cost of the yarn with a slight increase in its antistatic properties . The addition of Bequinox fiber to the fiber mixture during the preparation of the yarn allows you to get fabrics and knitwear of any structure with the required antistatic properties.

The introduction into the composition of the yarn of heat-resistant polyparaaramide fiber in an amount of 2-4 wt.% Allows to improve the processing of yarn during weaving, to give the yarn additional resistance to tearing, to reduce heat shrinkage at high temperatures. Moreover, the introduction of a polyparaaramide fiber of less than 2 wt.% Does not allow to achieve the above advantages, and more than 4 wt.% Does not lead to a significant improvement of these properties, but increases the cost of yarn and complicates the subsequent process of dyeing fabric.

To obtain yarn, fibers of well-known brands are preferably used: Kermel - France; Nomex - USA; Konex - Japan; Newstar - China; Kevlar - USA; Twaron - Japan; Beckinox - Belgium; Lenzing - Austria; Avilon - Finland and others.

The yarn of the claimed compounds can be obtained under industrial conditions on any existing apparatus and machines for the production of textile yarn available in production.

Qualitative characteristics of the various declared yarn compositions, as well as their comparison with the qualitative indicators of the well-known yarns from Kermel (France) and NOMEX Comfort (USA) are shown in the Table.

As follows from the Table, the claimed yarn compositions have lower heat shrinkage and specific surface electrical resistance, as well as a higher oxygen index, which could not be foreseeable based on the known properties of the fibers used in the composition of the yarn.

Yarn with these properties allows you to get woven and knitted products from it with improved fire resistance, heat resistance and antistatic properties.

Protective clothing made from fabrics based on the declared yarn compositions will increase the safety of the work and service of the military, rescuers, firefighters, electricians, metallurgists, welders and workers of other thermo- and flammable industries.

Table Indicator Yarn composition TERMOL TERMOL TERMOL Yarn company Kermel NOMEX Comfort 46.5% - Kermel 45.0% - Newstar 55.0% - Newstar 50% Kermel 93% Nomex 2.5% - Twaron 4.0% - Twaron 4.0% - Twaron 50% - Lenzing 5% - Kevlar 50% - Lenzing 50% - Lenzing 39.0% - Avilon 2% - P140 1% - Beckinox 1% - Beckinox 2.0% - Beckinox Actual Linear Density, Tex (No.) 33.0 (No. 30.3) 33.4 (No. 29.9) 33.0 (No. 30.3) 32.8 (No.30.5) 33.5 (No.29.9) Deviations of the actual linear density from the nominal,% 1,0 0.3 2.0 1,6 0.3 The coefficient of variation in linear density,% 2.2 1.7 2.1 1,2 1.8 Specific breaking load, cN / tex 22.3 16.8 17.9 18.3 19.1 The coefficient of variation in breaking load,% 1,1 4.0 1.9 0.9 3.0 Elongation at break,% 22.0 8.2 8.0 22.0 21.0 Humidity% 5,0 4.0 4.0 6.1 1.8 Shrink (300 ° C, 5 min),% 11.83 12.51 11.02 16.65 27.17 Oxygen Index (GOST 12.1.044-89) 33.9 33.1 33,2 32,4 28.3 Surface resistivity, Ohm 10 ⁴ 10 ⁴ 10 ² 10 ¹³ 10 ¹²

Claims (5)

1. Heat-resistant, fire-resistant and antistatic yarn for woven and knitted products, characterized by the following composition of components, wt.%:
heat resistant polyamidoimide or polymetharamide fiber 45-55 heat resistant polyparaaramide fiber 2-4 antistatic fiber 1-2 flame retardant viscose fiber rest 2. The yarn according to claim 1, characterized in that Kermel fiber is used as the polyamidoimide fiber. 3. The yarn according to claim 1, characterized in that as a polymetharamide fiber, Nomex, Konex or Newstar fiber is used. 4. The yarn according to claim 1 or 2, or 3, characterized in that Kevlar or Twaron are used as the polypararamid fiber. 5. The yarn according to claim 4, characterized in that Bekinoks is used as an antistatic fiber, and Lenzing or Avilon is used as fire-resistant viscose fiber.