RU2275949C2 - Mode of manufacturing fire-proof covering - Google Patents

Abstract

FIELD: the invention refers to manufacturing of fire-proof covering and may be used in chemical industry, construction, mechanical engineering and other fields of industry and vital activity of man there where insulated, light and fire-proof coverings are applied.

SUBSTANCE: the mode is fulfilled in the following manner. The polymer film is preliminary perforated. Then a plastic fire-proof compound is put on with possibility of polymerization. After that the film is winded in a roll with following exposure in the roll The winding into the roll is executed with packing an additional non perforated polymer film between the layers of covering. At that the exposure in the roll is carried during the whole period of time corresponding 50-80% of duration of full polymerization.

EFFECT: high productivity of the mode and its technological effectiveness with relatively not high labor-consuming character.

2 cl, 2 dwg, 3 ex

Description

The invention relates to the production of fireproof and protective coatings and can be used in the chemical industry, construction, engineering and other areas of industry and human life, where hermetic, light and fireproof coatings are applicable.

The manufacture of fireproof coatings having both low specific gravity, tightness, thermal insulation properties and low cost of coatings is difficult because of the complexity of applying fireproof coatings to affordable and cheap polymer films of flame retardants, which in turn is associated with low adhesive properties of the films. At the same time, the use, for example, when cladding building facades as sealing thermal screens of plastic films, poses a serious danger of the spread of fire along the walls of buildings. A similar threat is represented by sealed in plastic films instruments and equipment located in warehouses. The creation of protective polymer coatings with the properties of polyethylene films, but not combustible, would solve the problem of fire safety and reduce costs when releasing the latter.

A known method of producing multilayer ceramic products from a composite material, including the preparation of a mixture of a composition of silicon nitride — yttrium oxide or silicon nitride — magnesium oxide and boron nitride, drying, obtaining briquettes in a metal mold, laying finished briquettes in a graphite mold, hot pressing in a nitrogen medium, characterized in that briquettes are used from at least two different charge compositions from a composition based on silicon nitride with a step change in the content of boron nitride to 50 wt.%, the number of briquettes and the stacking sequence is determined by a specific range of properties, and hot pressing is carried out in graphite molds at 1550-1700 ° C, pressure 10-20 MPa for 2 hours (RU Patent No. 2112762, 10.06.1998).

The known method is characterized by high complexity and cost, not applicable for the creation of light and flexible coatings based on polymer films.

A known method of manufacturing a multilayer heat-reflecting material with improved physical and mechanical properties in compliance with the following technological operations:

- applying to the non-metallized side of the polyethylene terephthalate film an intermediate adhesive layer in the form of a solution in ethyl acetate of a mixture of fluoroplast, polyurethane and polyisocyanate;

- duplication of this film with silica fabric, forming the lower layer of material;

- drying the resulting material to remove solvent;

- thermal contact processing under pressure;

- bedding of the finished material with the aim of final structuring of the adhesive layer and achieve optimal physical and mechanical characteristics (RU Patent No. 2144777, 01/27/2000).

A known method of manufacturing a multilayer heat-reflecting material is characterized by high complexity and cost, is not environmentally friendly enough, is not applicable for creating light and flexible coatings based on polymer films, is not universal when using various flame retardants.

The closest is a method of manufacturing layered films, including preparing the coating material, applying it to the substrate and subsequent heat treatment, while applying the coating material is carried out simultaneously by spraying its components through a flat slot nozzle with feeding them to the side surface of the concentrator, oscillating with a frequency of 18100 kHz in the plane perpendicular to the film surface (RU Patent No. 2099192, 12/20/1997).

The known method of manufacturing layered films is characterized by a relatively high complexity and requires special high-frequency equipment, does not allow to obtain a protective fireproof coating, applicable for a wide range of objects, is not universal when using various flame retardants.

The objective of the invention is to develop a high-performance method with high manufacturability and relatively low laboriousness to obtain a non-combustible coating based on a polymer film, a method universal when using various flame retardants.

The problem is solved in that in a method comprising applying a flame retardant plastic composition to a polymer film with the possibility of polymerizing the latter, according to the solution, the polymer film is pre-perforated, and after the flame retardant is applied, wound into a roll, followed by holding it in a roll for a period of time corresponding to 50 80% of the duration of complete polymerization, while winding into a roll is carried out with a lining between adjacent layers of the coating additional non-perforated polymer film.

Distinctive features are:

- the polymer film is pre-perforated (which makes it possible to fix practically any polymerizable flame retardant compositions on the surface of the polymer film, since the perforations work as holding holes, and the flame retardant pressed through them acts as rivets);

- after applying the flame retardant, the fireproof coating is wound onto a roll, followed by holding it on a roll (which provides an increase in the processability, compactness when installed for the duration of exposure);

- winding into a roll is carried out with a gasket between adjacent coating layers of an additional non-perforated film (which increases the convenience of further use of a non-combustible coating, for example, when unwinding a roll, transportation, etc.);

- aging in a roll is carried out for a period of time corresponding to 50-80% of the duration of the complete polymerization (which increases the processability and makes it possible, if necessary, to shape the expanded fireproof coating to the desired profile, because the polymerization process is not yet completed, or cut into pack flat feet into feet without breaking the integrity and tightness of the coating).

Thus, the claimed solution meets the criterion of "novelty." Comparison of the proposed solutions with analogues did not allow us to identify in them the features that distinguish the claimed solution from the prototype, which allows us to conclude that its criterion of "inventive step" of the implementation of the method.

The invention is illustrated by drawings, where in Fig.1 shows a schematic diagram of the implementation of the method, Fig.2 is a section of the film in the technological sequence.

The method is carried out in the following sequence: unwinding the polymer film 1 from the coil 2, performing perforations 3 on the film with a perforator 4, applying a flame retardant 5 with the nozzle 6, applying an additional polymer film 7 from the unwinding coil 8 and subsequent winding on the receiving coil 9.

Examples of the method.

Example 1

A high-pressure polyethylene film PVD-153 with a width of 1886 mm and a thickness of 1 mm was perforated with holes with a diameter of 3.5 mm, a layer of 2 mm was applied fire retardant with ingredients taken in the following ratio, wt.%:

Liquid glass 30.2-32.8 Sodium Aluminate 12.0-12.6 Diaphragm Electrolysis Product aqueous saline 3.4-3.6, Inorganic Powder Filler rest,

while the powder mineral filler contained in wt.% of the total content in the ready-to-use material:

Ground mica 15.2-16.2 Ore sand of the Tugan deposit 17.8-19.0 Corundum rest

When coiling on a take-up reel between adjacent layers, an additional non-perforated cushioning film of a similar width with a thickness of 1 mm was placed. It was kept in a roll for 5 days (with a period of complete polymerization of the flame retardant composition for 10 days), the roll was unwound, an additional non-perforated film was separated for reuse, and the resulting non-combustible coating from the flame retardant film fixed in the perforations was cut into standard sheets and packaged for final exposure for another 5 days until the complete polymerization of the flame retardant.

Example 2

High-pressure polyethylene film PVD-153 with a width of 1886 mm and a thickness of 1.5 mm was perforated with holes with a diameter of 4.5 mm, a layer of 2.5 mm was applied with a fire retardant composition with ingredients taken in the following ratio, wt.%:

Liquid glass 20.0-30.0 Sodium Aluminate 10 The product of diaphragm electrolysis of water saline solution 5-10 Inorganic Powder Filler rest

When coiling between adjacent layers, an additional non-perforated cushioning film of a similar width with a thickness of 1 mm was placed. It was kept in a roll for 9.6 days (with a period of complete polymerization of the flame retardant 12 days), the roll was unwound, an additional non-perforated film was separated for reuse, and the resulting non-combustible coating was cut from standard fire retardant films into standard sheets, profiled into the shape of a wavy surface and packaged on lodges for final exposure for another 2.4 days to complete shaping and polymerization of the flame retardant.

Example 3

High-pressure polyethylene film PVD-153 with a width of 1886 mm and a thickness of 2 mm was punched with holes with a diameter of 5 mm, a layer of 2.5 mm was applied with a fire retardant composition with ingredients taken in the following ratio, parts by weight:

Polymer binder - resin ED-16 51-66 Combustion Inhibitor - Antimony Trioxide four Cooler - potassium alum 30-45

Repeated technological operations analogously to example 1,

kept on a roll for 16 hours (with a period of complete polymerization of the flame retardant 24 hours), cut into standard sheets and packaged for final aging for another 8 hours until the full polymerization of the flame retardant.

In all examples, the resulting coatings did not exfoliate and possessed the necessary fire retardant properties.

A method of manufacturing a fireproof coating with high performance is technologically advanced and versatile when using various flame retardant compositions, has a relatively low labor intensity and the cost of obtaining a fireproof coating based on a polymer film.

Claims (3)

1. A method of manufacturing a fireproof coating, comprising applying a plastic flame retardant to the polymer film with the possibility of polymerizing the latter, characterized in that the polymer film is pre-punched, and after applying the flame retardant, wound into a roll, followed by holding it in a roll. 2. The method according to claim 1, characterized in that the winding into a roll is carried out with a gasket between adjacent adjacent coating layers of an additional non-perforated polymer film. 3. The method according to claim 1, characterized in that the shutter speed is carried out for a period of time corresponding to 50-80% of the duration of the complete polymerization.

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