Fire resistant textile material

 

The invention relates to the production of flame resistant textile materials for filtration PPE. Fire resistant textile material is a textile fabric with antepartum composition on the basis of emulsion polyvinyl chloride, applied to the canvas in the form of different geometric located in different combination of elements, in which the original flame retardant composition is 100 wt.h. emulsion polyvinyl chloride further comprises urea in an amount of 5-15 wt.h. and water in an amount of 5-15 wt. including the Invention significantly improves the stability of the flame retardant properties of the material in the course of its operation. 65 ill., 3 table.

The invention relates to flame resistant textile materials, namely, materials with discrete polymer coating used for the manufacture of fire-resistant filter PPE.

The prior art For protecting humans from the hazards of flame uses a variety of flame retardant textile materials resistant to combustion, in particular, is known flame retardant textile materials constituting the fabric, impregnated with a special status is 4032517, 1977), which is a fabric on which the two sides suffered a composition comprising a vinyl chloride paraffin, Sevilen, antimony trioxide, chalk, kaolin and zinc oxide. However, this kind of airtight material and may not be used for the manufacture of protective clothing filter type.

Also known flame-retardant textile material (U.S. patent 4045406, 1977 ), which is a cellulose or synthetic fabric with a three-layer coating. When this first layer is obtained by impregnation of the fabric with a solution of zinc borate in the glycol. The second layer is a layer of urea resin containing antimony trioxide, and the third layer is made from a mixture of tricresylphosphate, chlorinated paraffin wax and polyvinyl chloride. The material has good flame retardant properties, but also airtight and not suitable for the manufacture of protective clothing filter type.

Famous textile materials, combining resistance with the air and vapor permeability, obtained by impregnation of cellulosic fabrics with a solution of the flame retardant composition (M. Okada. Regulation of fire resistance of textile materials, J. Jap. Assoc. Text. End - Uses, 1979, T. 20, 4, S. 122; kirkina L. I. , Romanova, L. I., Baskov So So fire-retardant finish textilis stability during operation, as fire retardant impregnation reduces the strength of the fabric and not firmly fixed on her.

The closest technical solution is fire resistant textile material containing textile material coated in the form of a discrete layer, made in the form of different geometric and located in various combinations with each other elements, antepartum composition on the basis of emulsion PVC (patent of Russia 2137607, 1999).

As it contains plasticizers commonly used substances such as di(2-ethylhexyl)phthalate, alkilany ether orthophosphoric acid (DAP) and others.

As stabilizers of polyvinyl chloride it contains also common for this purpose substances, for example stearinovokisly calcium, epoxy resin, and others.

As flame retardants, it contains substances are also known for this purpose, such as antimony trioxide, aluminum hydroxide, and others.

This material has a high flame-retardant properties and good breathability. However, it has a serious disadvantage in a substantial decrease in flame retardant properties during operation, resulting mechanical whom/p> Summary of the invention object of the invention is search fire resistant textile material containing textile fabric coated in the form of a discrete coverage in the form of different geometric located in various combinations with each other elements antepartum composition containing emulsion polyvinyl chloride, plasticizer, stabilizer and the flame retardant, which would increase the stability of the flame retardant properties in the course of its operation.

The problem is solved flame-retardant textile material containing textile fabric coated in the form of a discrete coverage in the form of different geometric located in various combinations with each other elements antepartum composition containing emulsion polyvinyl chloride, plasticizer, stabilizer and the flame retardant, characterized in that the painting contains a discrete coverage area of 25%, and the composition additionally contains urea and water in the following content, wt.h.: Emulsion polyvinyl chloride - 100 Plasticizer - Stabilizer 60 - 5-Fire - 28 Urea - 5-15 Water - 5-15 Distinctive features of the invention are the area of coverage and additional presence in the source an is.

These distinctive characteristics are not known to increase the stability of the flame retardant properties during operation of the material.

The invention significantly improves the stability of the flame retardant properties of the material in the course of its operation. This is manifested in the fact that such indicators flame retardant properties, as the time of complete combustion, the time residual burning time and residual smouldering deteriorate during operation is significantly less. Thus, in the dry friction time complete combustion decreases 14.8-23,3% (on prototype 22.9-40,2%), residual combustion increased by 14.8 25.7 per cent (on prototype 31.2-49,8%), and the residual decay increases by 14.4-29,9% (on prototype 41.1-51,3%).

Information regarding the playback of the invention
For carrying out the invention use the following materials. As a fabric base may be used without any restrictions textile material that meets the customer's requirements on basic physical-mechanical characteristics, in particular globalview fabric (50:50) art.405 plain weave, globalview fabric (50:50) art.309 Rasulova weave.

The polymer binder of the coating - eMule-(2-ethylhexyl)phenylphosphate (DUFF) THE 6-05-1611-78, three-(chloroethyl)phosphate (TCHEPH) THE 6-05-1611-78, tricresylphosphate (TKF).

The stabilizers of polyvinyl chloride - calcium stearinovokisly THE 6-09-4104-75, barium-cadmium-zinc salt of synthetic fatty acid fraction With10-C13(stabilizer SCS K-17) THE 6-09-4346-78. The fire - retardant antimony trioxide THAT 48-141-72, Tris-(2,3-dibromopropyl)phosphate (TDBP) THE 6-16-3086-88. Urea GOST 6691-77. Water technical.

To obtain material prepared PVC-plastisol well-known way by mixing PVC resins with plasticizers, stabilizers, flame retardants, urea and water and the subsequent "aging" of the obtained paste. Then the plastisol is applied through perforated patterns on a textile fabric in the form of a discrete coverage, the elements of which can have a different geometric shape (e.g., hemispheres with radius of 0.25-0.50 mm in a checkerboard pattern with a density of 100 cm-2and area coverage 25%) and can be located in various combinations with each other. The semi-finished product is subjected to heat treatment for gelation of the polymer coating at 150-180oWith over 15-3 min, respectively. The specific coating weight 110-130 g/m2. Some possible forms of a discrete coverage shown in Fig.1-65.

Properties of the resulting p is th form of a discrete coverage, are shown in tables 2 and 3.

To measure the Flammability of materials: time complete combustion, time residual burning time and residual smouldering used a special device. Included with the device includes a combustion chamber, a frame for fixing samples, alcohol burner-width of the wick 25 mm screen to extinguish the flame, the resistance thermometer to measure the temperature inside the chamber, thermocouple pyrometer for measuring the temperature of the flame burner and a stopwatch. The construction of the camera is performed according OST 90094-79. Samples for the determination of indicators of Flammability of materials in a vertical position was in the form of a rectangle with dimensions 290 x 70 mm and were cut at a distance of not less than 20 mm from the edge of the material in two directions: three along the base and along the weft. The end of the sample intended for burning, collapsed while standing in the form of a loop height of 40 mm and sew at a distance of 10 mm from the edge of the cotton threads across the width of the sample.

Installed the following test parameters: the height of the flame of the burner 20 mm, the temperature of the flame at a height of 15 mm from its base - not less than 840oWith temperatures in the chamber of the device - no more than 60oC.

The samples were placed in a frame, koto loop, podnosilac lit the burner so that the flame was parallel to the fold line of the loop, and the sample was placed in a flame to a depth of 5 mm

To determine the time of complete combustion chronometerwerke the process of complete combustion of the loop of the sample, in seconds.

To determine the time remaining burning time and residual smouldering sample in this position is aged 12, after which the burner is removed and chronometerwerke self-combustion, i.e. the time interval in seconds during which the specimen continues to burn after removal of the flame, and corruption, i.e. the time interval in seconds during which the sample continues to smolder after the extinction of the flame.

For the accepted average of the indices for the three samples.

The surface density of a material is determined by weighing the sample material is accurately known area and is calculated by the formula

where M is the mass of the sample area S cm2, g;
S - area of the sample material, cm2.

The wear resistance of the material was characterized by the change of the useful properties of the samples (surface density, the time for complete combustion, the time residual Woe to the bone (GOST 9913-90) on the instrument the DIT-M (abrasive) cloth serosianno art. 6405 (GOST 6621-72), the specific pressure of the abrasive to the material sample 0.25 MPa, the number of cycles 500, the speed of rotation of the abrasive 100 min-1).

Change the time of complete combustion, residual combustion and residual decay was calculated by the formula

where1the time of complete combustion, the time residual combustion or time remaining corruption of the original sample (before abrasion), in seconds, respectively;2the time of complete combustion, the time residual burning time or the residual decay of the sample subjected to abrasion, in seconds, respectively.

The change in the surface density was calculated by the formula

where1- the surface density of the original sample (before abrasion) in g/m2;2- the surface density of the sample subjected to abrasion, in g/m2.


Claims

Fire resistant textile material containing textile fabric coated in the form of a discrete coverage in the form of different geometric located in different typinator, the stabilizer and the flame retardant, characterized in that the painting contains a discrete coverage area of 25%, and the composition additionally contains urea and water in the following content, wt.h.:

Emulsion polyvinyl chloride 100

The plasticizer 60

The stabilizer 5

Fire retardant 28

Urea 5-15

Water 5-15

 

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