RU2745948C1 - Method for producing multi-layer insulating material with barrier layer - Google Patents

Abstract

FIELD: insulation materials.

SUBSTANCE: invention relates to a method for producing a multilayer insulating material with a barrier layer having universal protective properties, intended for the manufacture of protective clothing against a liquid phase, vapors and toxic gases, including highly toxic, aggressive, oxidizing chemicals, oil products, from exposure to open flames and thermal flows, including a modification of an insulating material, which is a polyamide or polyester fabric or mixed cotton-polyamide or cotton-polyester fabrics with a layer based on butil rubber or butil rubber with synthetic rubber triple ethylene propylene (SRTEP) applied on one or both sides, consisting in sequential application on the upper side of the insulating material of an adhesive based on polychloroprene rubber (PCP), lamination with a film followed by the application of a polymer layer from a composition based on chlorosulfonated polyethylene (CSPE) and PCP in a mass ratio of 75-85: 15-25 and a polymer layer from the composition based on CSPE and PCP in a mass ratio of 75-85: 15-25, including aluminum powder, and further vulcanization at a temperature of 120-140 °C.

EFFECT: technical result is to ensure a universal nature and versatility of the material with a reduced surface density, at the same time having high protective properties against various chemical products, open flames, heat flows, and resistant to abrasion.

3 cl, 1 tbl, 2 dwg

Description

The invention relates to a method for producing a multilayer insulating material with a barrier layer having universal protective properties for the manufacture of protective clothing against liquid phase, vapors and toxic gases, including highly toxic, aggressive, oxidizing chemicals, oil products, from exposure to open flames and heat flows ...

A known method of producing a multilayer insulating material with a wide range of protective properties (patent RU 2521053, IPC В32В 25/10, А62В 17/00, publ. 27.06.2014). For modification, rubberized materials with one-sided and two-sided coating of the base fabric with rubber compounds based on butyl rubber (BK) and its mixture with synthetic triple ethylene propylene rubber (EPDM), as well as compositions based on chlorosulfonated polyethylene (CSPE) and polychloroprene rubber (PCP) were used. Multilayer insulating material with a wide range of protective properties contains a barrier flake pigment and is used to make insulating suits of the highest level of protection against industrial toxicants.

The disadvantage of this invention is a lower level of protection against droplets of a highly toxic test chemical (TX) than multilayer fabrics with a film barrier layer.

Modern multilayer insulating materials with universal, multifunctional properties must contain barrier layers of polymer films that provide high protective properties against drops of TX, which has a high penetrating ability, and increased protective properties against open flames and heat fluxes.

Obtaining universal protective materials is based on the principle of multilayer, the use of rubbers and polymer films of different properties. BC has the lowest gas permeability of the known rubbers; chlorinated rubbers (HSPE, PCP) give the materials chemical resistance and resistance to open flame. Oriented films made of rigid-chain polymers provide multilayer materials with increased protection against liquid and gaseous phases of chemicals, increased resistance to open flame and heat resistance by increasing the layer structure of the materials. These material properties are important for suits designed for emergency rescue teams, whose personnel can work in a variety of extreme conditions.

Known four-layer protective insulating material ([Electronic resource] - access mode https://www.draeger.com), the structure of which includes an outer coating - a barrier layer - a base fabric - an inner coating.

The disadvantages of a four-layer protective insulating material are increased stiffness and surface density (up to 720 g / m ² ), complicated technology, expensive hot melt adhesives and special equipment required for its manufacture.

Known five-syllable protective insulating material ([Electronic resource] - access mode https://www.MSAsafety.com), the structure of which includes an elastomer cover layer - film laminate - BC layer - polyamide supporting fabric - BC layer.

The disadvantages of the five-layer protective insulating material are increased rigidity, surface density up to 560 g / m ² , complicated technology, expensive hot melt adhesives, and special equipment required for its manufacture.

The closest in technical essence is a multi-layer universal protective material (patent RU 2418680, IPC В32В 25/10, В32В 27/12, А62В 17/00, publ. 20.05.2011). The technical result of the known material is achieved by the manufacture of a multi-layer universal protective material containing a textile base, on one (inner) side of which there is a rubber (butyl) layer, on the other - a polyethylene terephthalate film glued to the base with glue and coated on the outside with a protective layer of an elastomer based on ChSPE , PCP or fluoroelastomer. The multilayer universal protective material obtained in this way has polyprotective properties.

This invention has several disadvantages:

- the technological process of obtaining a multi-layer universal protective material is intermittent, complicated;

- after gluing the film to the rubberized base fabric on one side (the film is glued from the textile side) at an ambient temperature of at least 30 ° C, the sample is kept for 24 hours to “ripen” the glue;

- further activation of the polyethylene terephthalate film before applying the polymer composition based on CSPE, PCP or fluoroelastomer is carried out manually with an alcohol solution of sodium hydroxide.

The technical objective of the present invention is to create a method for producing a multilayer insulating material with a barrier layer, universal, multifunctional, with a reduced surface density, but with high protective properties from various chemical products, from an open flame, heat fluxes, abrasion-resistant, increasing the protective properties and simplifying technological process of its receipt.

The technical result is achieved by a method of obtaining a multilayer insulating material with a barrier layer, including a modification of the insulating material, which is a polyamide or polyester fabric, or blended cotton-polyamide or cotton-polyester fabrics with a layer applied on one or both sides of a layer based on BC or BC with synthetic rubber ethylene propylene triple (EPDM), which consists in the sequential application of an adhesive based on polychloroprene rubber (PCP) on the upper side of the insulating material, lamination with a film followed by the application of a polymer layer from a composition based on chlorosulfonated polyethylene (CSPE) and PCP in a mass ratio of 75-85: 15 -25 and a polymer layer made of a composition based on HSPE and PCP in a mass ratio of 75-85: 15-25, including aluminum powder, and further vulcanization at a temperature of 120-140 ° C.

Distinctive features of the method for producing a multilayer insulating material with a barrier layer is that lamination is carried out with a polyamide or polyimide film at an ambient temperature of 15-30 ° C, and vulcanization is carried out at a temperature of 120-140 ° C after preliminary heat treatment of the modified insulating material at a temperature of 70 -100 ° C.

The use of a polyamide or polyimide film instead of a polyethylene terephthalate (lavsan) film increases the resistance of the material to abrasion and bending in accordance with GOST R 12.4.284-2013, contributes to better interlayer adhesion.

Insulating materials based on BC and its copolymers are used as a base, preferably with a surface density of 280-320 g / m ² .

The principle of obtaining a multilayer insulating material with a barrier layer based on various polymers, each of which performs its own protective functions, makes it possible to obtain a multilayer insulating material with a barrier layer with universal protective properties.

The constructions of a multilayer insulating material with a barrier layer are shown in FIGS. 1 and FIG. 2.

A multilayer insulating material with a barrier layer, obtained according to the claimed method based on a one-sided material, contains a layer of a carrier fabric (1), on the outside of which a layer based on BC (2) is located, an adhesive (3) is applied to it, then a barrier layer (4 ), covered with polymer layers (5, 6) according to recipes 1, 2, respectively (Fig. 1).

A multilayer insulating material with a barrier layer, obtained according to the claimed method on the basis of a double-sided material, contains a layer of a supporting fabric (1), on both sides of which there are layers based on BK or BK EPDM (2, 3), above the layer (3) there is an adhesive ( 4), then a barrier layer (5) covered with polymer layers (6, 7) according to recipes 1, 2, respectively (Fig. 2).

Polyamide or polyester fabrics or blended cotton-polyamide or cotton-polyester fabrics are used as the carrier fabric.

As polymer layers, polymer compositions based on HSPE and PCP are used in a ratio of 75-85: 15-25 wt. h., as an adhesive - glue based on PCP: "4NB-uv", or "Chris-5", or glue according to recipe 1 (mainly as a primer).

As a barrier layer, polyamide or polyimide films are mainly used.

A multilayer insulating material with a barrier layer is produced by known methods of laminating and rubberizing polymer-textile materials.

The invention is illustrated by the following examples.

Example 1

On the front side of the one-sided insulating material with BK, glue "4NB-uv" is applied, after the insulating material leaves the heating zone, it is laminated with a polyamide film. Next, a polymer composition based on HSPE and PCP is applied according to recipe 1 with the following ratios of components, parts by weight:

Recipe 1

KhSPE 80.0 ± 5 PCP 20.0 ± 5 Aluminum hydroxide 33.0 ± 3 Antimony trioxide 15.0 ± 1.5 Chloroparaffin 15.0 ± 1.5 Magnesium oxide 10.0 ± 1.0 Rosin 2.5 ± 0.25 Pigment yellow 2.0 ± 0.2 Captax 0.3 ± 0.03 Thiuram 0.6 ± 0.06 Petrol 140.3 ± 20.0 Ethyl acetate 280.6 ± 30.0

Next, a polymer composition based on HSPE and PCP is applied according to recipe 2 with the following ratios of components, wt. h .:

Recipe 2

KhSPE 80.0 ± 5 PCP 20.0 ± 5 Aluminum hydroxide 33.0 ± 3 Antimony trioxide 15.0 ± 1.5 Chloroparaffin 15.0 ± 1.5 Magnesium oxide 10.0 ± 1.0 Aluminum powder 15.0 ± 1.5 Rosin 2.5 ± 0.25 Pigment yellow 2.0 ± 0.2 Captax 0.3 ± 0.03 Thiuram 0.6 ± 0.06 Petrol 140.3 ± 20.0 Ethyl acetate 280.6 ± 30.0

Laying of polymer compositions based on CSPE and PCP according to formulations 1 and 2 on a polyamide film is carried out in a ratio of 1: 1. Next, the modified insulating materials are subjected to preliminary heat treatment at a temperature of 70-100 ° C, followed by vulcanization at a temperature of 120-140 ° C.

Example 2

On the front side of the double-sided insulating material based on BC with EPDM, Chris-5 glue is applied, after the insulating material leaves the heating zone, it is laminated with a polyimide film, then a polymer composition based on ChSPE and PCP is applied according to the recipe specified in example 1.

Next, a polymer composition based on CSPE and PCP is applied according to recipe 2, indicated in example 1.

Laying of polymer compositions based on CSPE and PCP according to formulations 1 and 2 on a polyimide film is carried out in a 1: 1 ratio. Further, the modified insulating materials are subjected to preliminary heat treatment at a temperature of 70-100 ° C, followed by vulcanization at a temperature of 120-140 ° C.

Example 3

On the front side of the double-sided insulating material based on BC, glue is applied sequentially according to recipe 1 and glue "4NB-uv", after the insulating material leaves the heating zone, it is laminated with a polyamide film, then a polymer composition based on CSPE and PCP is applied according to recipe 1 specified in example 1.

Next, a polymer composition based on CSPE and PCP is applied according to recipe 2, indicated in example 1.

Laying of polymer compositions based on CSPE and PCP according to formulations 1 and 2 on a polyimide film is carried out in a 1: 1 ratio. Further, the modified insulating materials are subjected to preliminary heat treatment at a temperature of 70-100 ° C, followed by vulcanization at a temperature of 120-140 ° C.

The results of testing the physical, mechanical and protective properties of samples of a multilayer insulating material with a barrier layer obtained by the proposed method in comparison with samples of a multilayer universal protective material (patent RU 2418680, publ. 05/20/2011) are presented in table 1.

Tests of the physical, mechanical and protective properties of samples of a multilayer insulating material with a barrier layer were carried out according to proven standards and methods.

Thus, a multilayer protective material with a barrier layer obtained by the proposed method has a low surface density, abrasion resistance, high physical, mechanical and universal protective properties when exposed to vapors, gases, liquid phase toxic (including highly toxic), aggressive, oxidizing chemicals, petroleum products, from heat flows and open flame, while the technological process of its production is continuous, it does not take time to "ripen" the glue, activate the polyamide or polyimide film before applying the polymer composition based on CSPE and PCP, lamination is carried out at ambient temperature air 15-30 ° C.

Claims (3)

1. A method of obtaining a multilayer insulating material with a barrier layer having a wide range of protective properties for the manufacture of protective clothing against liquid phase, vapors and gases of toxic, including highly toxic, corrosive, oxidizing chemicals, oil products, from exposure to open flames and heat flows , including a modification of an insulating material, which is a material with layers based on butyl rubber (BK) or BK with synthetic triple ethylene propylene rubber (EPDM) applied to the fabric on one or both sides, respectively, by applying an adhesive to the upper (front) side of the insulating material based on polychloroprene rubber (PCP), lamination with a film followed by application of a polymer layer based on chlorosulfonated polyethylene (CSPE) and PCP in a mass ratio of 75-85: 15-25 and a polymer layer from a composition based on CSPE and PCP in a mass ratio of 75-85 : 15-25, including flake pigment - aluminum powder y, and further vulcanization at a temperature of 120-140 ° C. 2. A method of producing a multilayer insulating material with a barrier layer according to claim 1, characterized in that the lamination is carried out with a polyamide or polyimide film at an ambient temperature of 15-30 ° C. 3. A method of obtaining a multilayer insulating material with a barrier layer according to claim 1, characterized in that the vulcanization is carried out at a temperature of 120-140 ° C after heat treatment of the modified insulating material at a temperature of 70-100 ° C.

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