RU2312769C1 - Composite laminated material used for manufacture of the protective closing - Google Patents

Abstract

FIELD: chemical industry; other industries; production of the protective clothing intended for protection against the poisonous substances and chemicals.

SUBSTANCE: the invention is pertaining to the means of protection, in particular, to protective materials for manufacture of the protective clothing intended for protection against the poisonous substances and chemicals. The composite laminate contains the layer of the fabric, on one side of which there is the elastomeric layer on the basis of the polymeric composition made out of the butyl rubber. On the other side of the fabric layer there is the layer made out of the fluorine-containing mixed thermoelastolayer compositions. The mixed composition consists of the mixture of fluoroelastomer and fluoroplastic polytetrafluorethylene in the ratio of 30-70:70-30. The technical result of the invention consists in maintaining of the high protective properties of the composite laminated material before and after the scuffing loadings, simplification of the material structure and its production process.

EFFECT: the invention ensures maintaining of the high protective properties of the composite laminated material before and after the scuffing loadings, simplification of the material structure and its production process.

1 dwg, 1 tbl, 5 ex

Description

The invention relates to protective equipment, in particular to protective materials for the manufacture of protective clothing intended for protection against toxic substances and chemicals.

Known layered material containing a layer of synthetic rubber and a textile base (see RU patent No. 2070517, IPC VBV 25/10, 1996). As a synthetic rubber layer, a mixture of high molecular weight (Navy) and low molecular weight (NMS) copolymers of vinylidene fluoride with hexafluoropropylene in a mass ratio of 70-80: 30-20 was used. The elastic layered material is made by the method of spreading with its subsequent vulcanization.

However, with many positive properties of the layered material (elasticity, good bonding of rubber with a textile base, manufacturability, high mechanical strength, etc.), this material is not suitable for sewing protective clothing, as it is not resistant to negative environmental temperatures, has high gas permeability, i.e. Not intended for protection against toxic substances. A significant drawback of the elastic laminate is its high cost.

As a prototype, a multilayer textile fabric was chosen for the manufacture of elastic containers, tents, tarpaulins, overalls, containing a fabric layer, on one side of which a rubber layer is located, and on the other side of the fabric layer, a film of synthetic polymer is placed between two rubber layers, while the film of the synthetic polymer is made of polyvinylidene fluoride (RU patent No. 2113354, IPC BVB 27/12, 1998). The rubber layer is applied by a known method of rubberization, and the individual layers are bonded by vulcanization. The multilayer textile fabric protects against chemical poisons and chemicals. However, the known material has a complex structure: to increase the elasticity of the material, it is necessary to have rubber layers on both sides of the polyvinylidene fluoride layer; the presence of a rubber layer on the outside of the polyvinylidene fluoride layer is necessary to determine damage to the polyvinylidene fluoride layer. Known material has a complex and time-consuming manufacturing technology, requiring a sequential arrangement of layers, which significantly increases the cost of the material.

Another significant drawback of the known material is the low adhesive strength between thermodynamically incompatible layers (polyvinylidene fluoride film and rubber layer) containing polymers of different chemical nature and structure (Kagan D.F. Multilayer and combined film materials. / D.F. Kagan, V.E. .Gul, L.D. Samarina. - M.: Chemistry, 1989.- S.175-199). In this connection, during long-term operation, when a multilayer textile fabric experiences abrasive loads that simulate the operation of products when worn, the protective layers are destroyed, which reduces the protective properties of this material (see tables, items 5, 6) and the life of the finished products.

The task of the invention is to maintain high protective properties of the material before and after abrasive loads, simplifying the design of the material and the technology for its manufacture.

The problem to be achieved is achieved in that the composite layered material contains a fabric layer, on one side of which a rubber layer is located, and on the other side of the fabric layer is a layer of a fluorine-containing mixed thermoplastic elastomeric composition.

The drawing shows a composite layered material of the invention.

The composite laminate contains a layer of textile fabric 1, on one side of which a rubber layer (inner) 2 is located, and on the other side of a fabric layer 1 is a fluorine-containing mixed thermoplastic elastomeric composition (outer layer) 3.

As a layer of textile fabric 1, for example, a polyamide, polyester, aramid web can be used.

The rubber layer 2 is formed from a rubber composition based on butyl rubber, which contains (based on 100.0 parts by weight of butyl rubber): vulcanization activator - (3.0 ± 0.5) parts by weight, vulcanizing agents - (3, 95 + 0.05) parts by weight, vulcanization rate regulator - (3.0 ± 0.5) parts by weight, fillers - (22.0 ± 2.0) parts by weight, plasticizer - (1, 0 ± 0.5) parts by weight, flame retardants - (74.0 ± 2.0) parts by weight and pigment - (1.5 ± 0.5) parts by weight

The fluorine-containing mixed thermoplastic elastomer composition 3 is a mixture of fluorine elastomer brand SKF-26 and fluoroplastic brand F-62 or F-26 in a mass ratio, for example, 30-70: 70-30 and fillers in the amount of (30 ± 5) wt.h.

Composite layered material, regardless of the type of textile fabric, is made according to traditional technology in the following sequence: at the first stage, a butyl rubber layer 2 is applied to the fabric layer 1 by calendering, and a layer of a fluorine-containing mixed thermoplastic elastomeric is applied on the other side of the fabric layer 1 by calendering composition 3 in the form of a solution (glue). A polymer composition based on a mixture of fluorine rubber and fluoroplastic, including fillers, is preliminarily prepared on rollers, then by dissolving the mixed fluorine-containing polymer composition in a mixture of acetone and ethyl acetate, an adhesive is prepared in a ratio of 1: 3, respectively.

The technical result is achieved by adding thermoplastic elastomer to the fluoroelastomer, without the need for additional layers to increase the elasticity of the material, the design and manufacturing technology of the material is simplified by eliminating the stage of vulcanization of the composite material, and defects in the outer layer — a layer of fluorine-containing mixed thermoplastic elastomeric composition 3 are detected when visual inspection of the material. High resistance to abrasive loads of the composite material during operation is achieved due to the presence of a fabric layer 1 between the rubber layer 2 and the layer of a fluorine-containing mixed thermoplastic elastomer composition 3, while the material construction eliminates the contact of the rubber layer with the fluorine-containing mixed polymer composition, which already excludes their thermodynamic incompatibility and increases adhesive strength between layers.

The inventive material is highly resistant to toxic substances and chemicals both to abrasive loads and after, while the manufacturing technology of the material is simple, the duration of the production process is reduced.

The invention is illustrated by the following examples.

Example 1. Composite material for the manufacture of protective clothing, consisting of three layers:

a layer of a fluorine-containing mixed thermoplastic elastomer composition containing 70 parts by weight fluoroelastomer brand SKF-26 and 30 wt.h. ftoroplasta brand F-62;

fabric layer - polyamide fabric;

a layer based on butyl rubber polymer composition.

Material properties are given in the table.

Example 2. Composite material for the manufacture of protective clothing, consisting of three layers:

a layer of a fluorine-containing mixed thermoplastic elastomer composition containing 70 parts by weight fluoroelastomer brand SKF-26 and 30 wt.h. fluoroplastic grade F-26;

fabric layer - polyester fabric;

a layer based on butyl rubber polymer composition.

Material properties are similar to example 1.

Example 3. Composite material for the manufacture of protective clothing, consisting of three layers:

a layer of a fluorine-containing mixed thermoplastic elastomer composition containing 30 parts by weight fluoroelastomer brand SKF-26 and 70 parts by weight ftoroplasta brand F-62;

fabric layer - polyamide fabric;

a layer based on butyl rubber polymer composition.

Material properties are similar to example 1.

Example 4. Composite material for the manufacture of protective clothing, consisting of three layers:

a layer of a fluorine-containing mixed thermoplastic elastomer composition containing 20 parts by weight SKF-26 and 80 parts by weight fluoroelastomer ftoroplasta brand F-62;

fabric layer - polyamide fabric;

a layer based on butyl rubber polymer composition.

The composite material of example 4 becomes more rigid and loses elasticity. As a result, abrasion resistance is reduced.

Example 5. Composite material for the manufacture of protective clothing, consisting of three layers:

a layer of a fluorine-containing mixed thermoplastic elastomer composition containing 30 parts by weight fluoroelastomer brand SKF-26 and 70 parts by weight fluoroplastic grade F-40 (or F-42, or F-32);

fabric layer - polyamide fabric;

a layer based on butyl rubber polymer composition.

The use of fluoroplastic grades 40, 42, 32 increases the rigidity of the material, as a result of which the resistance to abrasion is reduced.

The following is a table of the protective characteristics of the claimed material and the material of the prototype, from which it follows that the level of the initial protective properties of the claimed material is at the level of the material of the prototype and does not change after exposure to abrasive loads.

Table Indicators characterizing the prototype and an example of the claimed material Multilayer textile fabric according to patent No. 2113354 The inventive material according to example 1 1. Weight 1 m ² , g 500-650 580-620 2. Use against atomic, bacteriological and chemical effects; duration (hours) 500 500 3. Resistance to alternating abrasive loads, cycles and appearance 1000, the presence of creases on the outer layer 1000, without visible damage 4. Use against atomic, bacteriological and chemical effects after abrasive loads (1000 cycles); duration (hours) 22 500

Claims (1)

Composite layered material for the manufacture of protective clothing, containing a fabric layer, on one side of which there is a rubber layer, characterized in that the rubber layer is based on a polymer composition of butyl rubber, and on the other side of the fabric layer is a layer of a fluorine-containing mixed thermoplastic elastomeric composition, consisting of mixtures of fluoroelastomer and fluoroplast in a ratio of 30-70: 70-30, respectively.