Multilayer fire-resistant material

 

(57) Abstract:

The invention relates to technology of textile finishing production, namely, to furnish heat-resistant materials for sewing special fire retardant clothing with high physical-mechanical indicators. Multilayer fire-resistant material made in the form of a package and contains an outer layer of heat-resistant fibers, the intermediate insulating layer, the inner layer of cotton fabric and located between the intermediate and outer layers of the waterproofing layer of the siloxane composition, which together with the outer layer is 0.02 to 0.05 thickness of the intermediate layer. Siloxane composition of the waterproofing layer includes a synthetic low-molecular liquid silicon rubber SCTN with filler Aerosil grades a-300 or A-380 in the amount of 3.5-30 wt.h. on 100 wt.h. SCTN in the form of a polymer mixture and the hardener TO-10C on the basis of methyltriacetoxysilane in the amount of 3.5 - 5.0 wt.h. the polymer mixture. The material has a high ishibashiiwata and durability at the lowest flow rate of the polymer waterproofing layer by maintaining a high water-resistant qualities of the material. table 1.

The invention relative to the special fire retardant clothing, giving them high physical-mechanical parameters.

Known fire-retardant fibrous material with a finish by treating it with an aqueous solution of a polycondensation product tetrakis-(oxymethyl)-phosphonium with urea (U.S. patent N 2809941, 1997).

The fibrous material obtained in this way has a low resistance and textile properties, caused by the increase in its rigidity.

Known material in the form of a two-layer fabrics for personal protection of the skin of a person from the fire, containing outer layer of flame-retardant filaments (axalon) made of plain weave and the inner layer is made waffle weave with repeats interleaved based flame retardant and natural (from flax) yarn. The layers are interconnected 3rd and 7th weft threads of the outer layer and fire the main threads of the inner layer (patent RF N 2017871, 1994).

The material has a sufficiently high flame-retardant and mechanical properties. Due to the structure of the tissue, providing an air gap between the layers, slightly higher insulating ability of the inner layer, which is still insufficient to protect the skin in the manufacture of the mother of the wear of such material does not protect workers, in particular, fire, water.

Known closest to the claimed technical solution is selected as the closest analogue of the multilayer fire-resistant material for manufacturing protective against heat uniforms containing outer layer of armignago material, an intermediate insulating layer, the inner layer of cotton fabric and located between the intermediate and outer layers of the waterproofing layer of fluoropolymer or siloxane composition, which together with the outer layer is from 0.02 to 0.05 from the thickness of the intermediate insulating layer.

However, the known multilayer fire-resistant material has a low performance, that is evident in fairly rapid destruction of special fire retardant clothing made from such material. Destruction occurs when the impact on the clothes during operation, such as fire, alternating loads and abrasion. This material is sufficiently high flow rate of the polymer on the formation of the waterproofing layer.

An object of the invention is to create a new multilayer ognezashita is on the waterproofing layer by maintaining a high water-resistant qualities of the material.

The problem is solved in that in the multilayer fire-resistant material, made in the form of a package containing outer layer of heat-resistant fibers, the intermediate insulating layer, the inner layer of cotton fabric and located between the intermediate and outer layers of the waterproofing layer of the siloxane composition, which together with the outer layer is from 0.02 to 0.05 from the thickness of the intermediate layer according to the invention the siloxane composition of the waterproofing layer includes synthetic rubber heat-resistant low-molecular compound SCTN (GOST 13835-73. Synthetic rubber, heat-resistant, low molecular weight), as a filler which is used Aerosil (GOST 14922-77. AEROSIL. Technical conditions. Gosstandart, Moscow) one of the brands a-300, A-380 in the amount of 3.5-30 wt.h. on 100 wt.h. SCTN with the formation of the polymer mixture, and its hardener applied hardener TO-10C (TU 6-02-874-79. The hardener TO-10C) type methyltriclosan in the amount of 3.5-5.0 wt.h. on 100 wt. including polymer mixture.

In this part of the siloxane composition of the waterproofing layer having as filler SCTN Aerosil increases shimonthebest and snooki consumption of the waterproofing layer while maintaining a high water-resistant properties of the material, as can be seen from the following examples.

Example 1.

In a mixer containing 100 kg of synthetic low molecular weight liquid silicon rubber SCTN, gradually add 3.5 kg of Aerosil a-300 or A-380 and stir in for 1 hour. The mixture is then drained and left for 24 hours.

Select the 6 kg of the mixture in a container of not less than 10 l and to it was added 0.21 kg hardener, which take methyltriclosan. After thorough mixing the mixture with hardener for 2-3 minutes to get the composition of the viability of 1 hour.

Example 2.

In a mixer containing 100 kg of synthetic low molecular weight liquid silicon rubber SCTN, gradually add 16.8 kg of Aerosil a-300 or A-380 and stir in for 1 hour. The mixture is then drained and left for 24 hours.

Select the 6 kg of the mixture in a container of not less than 10 l and to it was added 0.4 kg hardener, which take methyltriclosan. After thorough mixing the mixture with hardener for 2-3 minutes to get the composition of the viability of 1 hour.

Example 3.

In a mixer containing 100 kg of synthetic low molecular weight liquid silicon rubber SCTN, gradually dobavliaut 6 kg of the mixture in a container of not less than 10 l and to it was added 0.6 kg hardener, which take the hardener TO-10C type methyltriclosan. After thorough mixing the mixture with hardener for 2-3 minutes to get the composition of the viability of 1 hour.

The layer composition obtained in each of the 3 examples, is applied to the inner surface of the layer of heat-resistant fibers, which will serve as the outer layer of the package multilayer fire-resistant material, and then applied layer is cured in the chamber at a temperature of 150o20oC and acts as a waterproofing layer, located between the intermediate layer, which borders the inner layer of the package, and the outer layer, and a waterproofing layer together with the outer layer is from 0.02 to 0.05 thickness of the intermediate layer.

With such a waterproofing layer improves the properties of the multilayer fire-resistant material (see table).

Comparative analysis of the claimed invention and prototype reveals the presence of distinctive features in the claimed material in comparison with the closest analogue that allows to make a conclusion on the conformity of the proposed solutions to the criterion "novelty".

The presence of distinctive features provides the ability to get Pokie ishibashiiwata and durability at the lowest applied to the fabric waterproofing layer.

Since the research object of the invention in the patent and scientific literature revealed no solutions containing characteristics of the claimed invention, other than the prototype, it must be concluded that the claimed invention meets the criterion of "substantial differences".

The use of the claimed invention in the technology of textile finishing production provides the invention according to the criterion of "industrial applicability".

Multilayer fire-resistant material, made in the form of a package containing outer layer of heat-resistant fibers, the intermediate insulating layer, the inner layer of cotton fabric and located between the intermediate and outer layers of the waterproofing layer of the siloxane composition, which together with the outer layer is 0.02 to 0.05 thickness of the intermediate layer, characterized in that the siloxane composition of the waterproofing layer includes a synthetic low-molecular liquid silicon rubber SCTN filled with Aerosil grades a-300 or A-380 in the amount of 3.5 - 30 wt.h. on 100 wt.h. SCTN in the form of a polymer mixture and the hardener TO-10C on the basis of methyltriacetoxysilane in the amount of 3.5 - 5.0 wt.) - Rev.

 

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