RU120970U1 - KNITTED FIRE-, HEAT RESISTANT FOOTWEAR - Google Patents

Abstract

1. Knitted fire-resistant, heat-resistant lined fabric has a fire-retardant front and comfortable seamy side, in which the front side contains yarn from chemical fire-resistant fibers or yarn from a mixture of chemical flame-retardant and natural fibers, and the seamy side contains yarn from a mixture of chemical flame-retardant and natural fibers. ! 2. Knitted fire-, heat-resistant lined fabric according to claim 1, characterized in that the ground and cover yarns consist of flame-retardant meta-aramid yarns or blended yarns containing at least 55% flame retardant modacrylic and cotton fibers, and the lining yarn - of blended yarns with the content of fire-resistant modacrylic and at least 45% cotton fibers. ! 3. Knitted fire-, heat-resistant lined fabric according to claim 2, characterized in that the linear density of the ground and cover yarns from the fire-resistant meta-aramid yarn is 16.7 tex × 1, the blended yarn is 18.5 tex × 1, and the lining thread is 18.5 tex × 2 with an areal density of the fabric from 250 to 260 g / cm2.

Description

The utility model relates to the textile industry, in particular to knitted fabrics with high properties to protect a person from fire and high temperatures.

These canvases can be used for the manufacture of fire and heat-protective winter linen products and comforters for workers in hot shops (metallurgists, welders, etc.), military specialists associated with the danger of fire (tankers, sappers, pilots), special forces, employees working in emergency natural and man-made situations.

Knitted fabrics for protecting a person from fire and high temperatures, made of lined weaving, from one blended yarn that contains flame retardant and natural fibers, Technical Textile Journal No. 26, 2011 dated 10/17/2011, http://www.rustm.net/ catalog / article / 2045 / html. - the closest analogue.

Such a knitted fabric does not give resistance to destruction when exposed to fire.

The utility model is faced with the task of obtaining a technical result: to eliminate an existing drawback and create a knitted fabric that has at the same time the maximum possible fire, thermal protective, hygienic properties and is suitable for the manufacture of thin products.

The technical result is achieved by the fact that the knitted fire-, heat-resistant lined fabric has a fireproof front and a comfortable wrong side, in which the front side contains yarn from chemical fire-resistant fibers or yarn from a mixture of chemical fire-resistant and natural fibers, and the wrong side - yarn from a mixture of chemical fire resistant and natural fibers.

The stated technical result is also achieved by the fact that in a knitted fire-, heat-resistant lined fabric, the ground and cover threads consist of fire-resistant meta-aramid yarn or blended yarn with a content of flame-retardant modacrylic at least 55% and cotton fibers, and the lining thread is made from blended yarn containing modacrylic and at least 45% cotton fiber.

The technical result achieved is also achieved by the fact that in a knitted fire-, heat-resistant lined fabric, the linear density of soil and cover threads of fire-resistant meta-aramid yarn is 16.7 tex × 1, blended yarn - 18.5 tex × 1, and a foot yarn of mixed yarn - 18.5 tex × 2 with a surface density of the canvas from 250 to 260 g / cm ² .

In this case, the technical result is achieved due to the output on the front surface of the yarn, in which fire-resistant fibers prevail.

For a knitted fabric working in various conditions, it is possible to adjust the properties by manipulating the composition of the yarn. But for the corresponding side of the knitted fabric, the predominance of the corresponding raw material component must be ensured. If the side is front (protective), then fire-resistant fiber (at least 55%) should prevail over natural. If the side is seamy (comfortable), then natural fiber should be at least 45%.

Other combinations of flame retardant and natural components are possible. For example, use for the protective side of a mixture of cotton with a predominance of modacrylic fibers (flame retardant component), for the hygienic side - cotton fibers (natural component).

Let's look at some examples of knitted fabric.

Example 1. Knitted fabric with a surface density of 250 g / m ² , in which the soil and cover threads forming the front side consist of fire-resistant meta-aramid yarn 16.7 tex × 1, and the lining threads forming the wrong side of the yarn 18.5 tex 2, containing 55% flame retardant modacrylic and 45% cotton fibers; while in the raw material composition of the knitted fabric, the ratio of components is as follows: fire-resistant modacrylic fiber - 50%, fire-resistant meta-aramid fiber - 28%, cotton - 22%).

Example 2. Knitted fabric with a surface density of 260 g / m ² in which the soil and cover threads forming the front side and the lining threads forming the wrong side consist of blended yarn with a linear density of 18.5 tex × 1 and 18.5, respectively × 2 with 55% flame retardant modacrylic and 45% cotton fibers; while in the raw material composition of the knitted fabric, the ratio of fibers is maintained.

These examples of webs have the minimum allowable amounts of each of the fibrous components in the soil, coating and lining threads.

Tests of the fire-, heat-resistant properties of the protective (outer) side and the hygienic properties of the comfortable (inner) side of the canvases were carried out according to the following indicators and gave the following results:

- resistance to open flame: when exposed to an open flame for 10 seconds. there is no ignition, the residual burning time is 0 sec., the absence of molten residues (tests according to GOST 12.4.200-99 "Occupational safety standards system. Special clothing for protection against heat and fire. Test methods with limited flame spread");

- cloth heat resistance - 85% (tests according to GOST "Technical fabrics. Method for determining heat resistance");

- thermo-insulating ability of linen products (in a bag - for 30 sec. the surface temperature of the sample does not exceed 40 ° С, and comforters - for 10 sec. the surface temperature of the product does not exceed 60 ° С (tests according to the "Method of experimental study of the thermally insulating ability of textile materials in contact with a heated surface No. 1/10 - AC "NPP" ARMOKOM-CENTER "LLC);

- hygroscopicity of the inner layer of the canvas is not less than 7.7%.

Other options for the execution of paintings on a utility model give only an improvement in test results.

According to a utility model, knitted fabrics are industrially applicable and can be produced from raw materials that are mass-produced on existing spinning and knitting equipment — a single-loop circular knitting machine for knitting a FIHN class 20 lined fabric.

Claims (3)

1. Knitted fire-, heat-resistant lined fabric has a fireproof front and comfortable wrong side, in which the front side contains yarn from chemical fire-resistant fibers or yarn from a mixture of chemical fire-resistant and natural fibers, and the wrong side - yarn from a mixture of chemical fire-resistant and natural fibers. 2. Knitted fire-, heat-resistant lined fabric according to claim 1, characterized in that the filament and cover threads consist of flame-retardant meta-aramid yarn or blended yarn with a flame-retardant modacrylic content of at least 55% and cotton fibers, and the lining thread is made from blended yarn with content of fire-resistant modacrylic and not less than 45% cotton fibers. 3. Knitted fire-, heat-resistant lined fabric according to claim 2, characterized in that the linear density of the soil and coating threads of fire-resistant meta-aramid yarn is 16.7 tex × 1, blended yarn is 18.5 tex × 1, and the lining thread is 18.5 tex × 2 with a surface density of the canvas from 250 to 260 g / cm ² .