SI9620121A - Coating for the internal surface of a pipe, method for applying the same on said surface, two-layered semi-finished part using said coating and method for making this part - Google Patents

Abstract

The present invention relates to a coating applied onto the internal surface of a pipe, wherein said coating consists of two coaxial tubular and film-type envelopes (2, 3) made of a thermoplastic polymer. The outer envelope (2) rests against the pipe (1) internal surface, while the inner envelope (3) is separated from the first by a coaxial main reinforcement layer (4) impregnated with a solidified polymeric binder. The inner envelope (3) is made in the shape of a multiple-component homogeneous system that comprises at least one polymer selected from the group of thermoplastic polymers having a relative stretching ratio of at least 200 % and a melting point of at least 100 degrees Centigrade. This homogeneous system also comprises a structural modifier of the selected polymer. The envelope (3) and the layer (4) are formed with unjoined edges in at least one place along the coating axis, wherein said edges (6, 7) are sealed together so that the envelope (3) and the layer (4) form a monolithic structure. The present invention also relates to a two-layered semi-finished part that comprises the inner envelope (3) linked to the reinforcement layer (4), wherein said envelope is obtained from the multiple-component homogeneous system having the above-mentioned composition

Description

TUBE INTERNAL SURFACE TUBE, METHOD FOR ITS ATTACHMENT TO THE RESTRICTED SURFACE, TWO-LAYER SEMI-PRODUCT OF THE SUSPENDED TIRE AND METHOD OF MANUFACTURING

Technical area

The present invention relates to the field of construction, in particular to the protection of the inner surfaces of the pipe against mechanical damage, corrosion or the formation of unwanted linings, more specifically describes the coat of the inner surface of the pipe, the method of its use, a two-layer semi-finished product of said coat and the method of manufacture of said semi-finished product.

The state of the art

The inner surface of the tube is known to be represented as a three-layer structure comprising two coaxially arranged layers of sheath, which are constructed of thermoplastic material, between which a reinforcement layer impregnated with a bond enhancer (FR, A, 2592457) is placed.

Also known is the method by which said sheath or sheath is applied to the inner surface of the tube, namely, tubular sheaths made on the basis of thermoplastic polymeric material are placed coaxially on the outside of the tube, where the outer layer is intended to adhere to the inner surface of the tube, the inner layer performs the function of inflating, and the two layers are separated from each other by a reinforcement layer impregnated with a thermally hardened bond, thereby obtaining a three-layer semi-finished product, which is inserted into the inner tube, and then a heat carrier is introduced under pressure into the cavity of the inner layer. heated to complete curing of the binder (FR, A, 2592457). In this way, an inner sheath containing fibers (polyester or glass) implanted by rolling along an external surface facing the reinforcing layer u is produced from the layer of polymeric material.

When adjusting the coaxially positioned reinforcement layer around such an inner envelope, as well as during the transport of such a semi-finished jacket to the inside of the tube, partial adhesion of the inner layer to the reinforcement layer is possible, resulting in the formation of wrinkles, irregularities of the inner layer of the envelope, and so on, which of course the quality of said coat.

Also known is a jacket for the inner surface of the tube, which consists of two tubular layers based on thermoplastic polymer material, which are arranged coaxially and from which the outer one adheres to the inner surface of the tube and is separated from the inner surface by a cured polymeric bond (RU , A, 2037734).

In this type of jacket, the inner layer with the reinforcing layer is only associated with the adhesion between said layer and with the hardened bond impregnating this reinforcing layer, which does not ensure effective connection of the inner layer of the entire envelope with the entire surface of the inner layer of the tube in This results in a partial peeling of the coat and a deterioration of the envelope.

A method is also known for making a jacket in which the tubular layers of the sheath made on the basis of thermoplastic polymeric material are assembled outside the tube and where the outer layer is intended to join with the inner layer of the tube and the second inner layer is separated from it by a reinforcing layer and is impregnated with thermally cured bond. This process gives a three-layer, partially finished part of the jacket, which is inserted into the pipe, and then the bond is hardened with hot thermal medium under pressure inside the pipe cavity (RU, A, 2037734).

However, deformation, unevenness, and defective areas of the envelope may occur during insertion of such a jacket on the tube, due to the free association of the inner layer of the jacket with the reinforcement layer, which complicates the technological process of insertion of the jacket and diminishes the quality of the wrinkles, folds on the surface of the coat and so on. The consequence of such irregularities is a change in the turbulent flow of the transported medium, an increase in the energy required to transport and a decrease in the useful life of such a mantle.

A method of manufacturing a jacket is also known, wherein a two-layer unfinished product (GB, A, 1569675) consisting of an inner tubular sheath connected to the reinforcing layer is used to effectively bond the inner layer of the sheath to the hardened bond and the reinforcing layer em.

Such an unfinished product is obtained (GB, A, 1569675) using a layer of polyurethane on a synthetic felt fiber from which a tubular structure is subsequently made. The bonding of the polymer layer to the synthetic felt material is made only by mechanical adhesion, which does not always provide sufficient strength; peeling of the inner sheath and the reinforcement layer of the sheath is possible during the manufacture of such a sheath as well as during use, which in turn reduces the quality of the whole sheath.

Summary of the Invention

The task is to create a jacket, or sheath, for the inner surface of the pipe, which would have a structure that would significantly increase the quality of the coating. In addition, it is necessary to develop a method of inserting said jacket on the inner surface of the pipe, by which said jacket would be inserted in such a way as to exclude the possibility of changes in the turbulent flow of the transported medium through the pipe and to reduce the energy consumption required for such transport, and would increase the useful life of such a two-layer partially completed part of said coat or semi-finished product.

In addition, it is desirable to provide a process for the manufacture of this two-layer semi-finished product, according to which this part would have a high adhesive power of connecting the inner layer of the sheath and the reinforcing layer of the sheath.

This is achieved by the fact that the inner tube jacket consists of two parallel tubular sheath layers, which are made of polymer thermoplastic material, where the outer layer of the sheath comes in contact with the inner surface of the tube, and the inner layer of the sheath is separated from the previous main reinforcement layer impregnated with a cured polymeric bond. According to this invention, the inner sheath is made by a multi-component homogeneous system containing at least one polymer selected from the group of thermoplastic materials whose coefficient of relative elongation is not less than 200% and the melting point is not below 100 ° C, and a structural modifier of the selected polymer, with which separate the inner layer of the sheath from the reinforcement layer of the sheath along the axis thereof in at least one location, and the separate edges are hermetically connected such that this sheath forms a monolithic structure including the main reinforcement layer.

If a thermoplastic material with a coefficient of relative elongation of not more than 200% is used in the manufacture of a multicomponent homogeneous system, an excessively rigid system is obtained which further stops the process of fabrication of the sheath, which is described below in the description of the present invention. The use of thermoplastic material, whose melting point does not exceed 100 ° C, is liable to deteriorate the sealing of the inner layer of the envelope in the presence of a hot medium, such as saturated water vapor, into the cavity of such a tube.

A group of thermoplastic polymers having a coefficient of relative elongation of less than 200% and a melting point above 100 ° C may include low density polyethylene, super-high molecular weight polyethylene, polypropylene, propylene copolymer with vinyl acetate, polyvinyl chloride and thermoplastic polyurethane, structural modi of the polymer, however, the polyorganosiloxane is selected from the group consisting of polymethylsiloxane, polymethylphenylsiloxane, polyphenylsiloxane and polyethylphenylsiloxane.

Due to their high thermal stability and low intermolecular interaction, polyorganosiloxanes do not form large agglomerates in thermoplastic polymer and are evenly distributed in the unoccupied volume, where they increase the mobility of the structural elements of a given thermoplastic polymer and help to form a more dense and orderly packing of large molecular chains. Such changes in the composition of the thermoplastic polymer increase its resistance to abrasive fatigue and increase adhesion to other substances, especially synthetic reinforcing agents.

The inner tubular layer of the sheath may be produced by a multi-component homogeneous system containing one polymer or a mixture of two polymers selected from the said group of thermoplastic polymers in an amount of 99.3-99.7% by weight relative to the total weight of the inner layer of the sheath, the content of polyorganosiloxane however, it ranges from 0.3 to 0.7% by weight relative to the total weight of the inner layer of the wrapper.

If a multi-component homogeneous system of one or a mixture of two thermoplastic polymers in an amount of less than 99.3% by weight and polyorganosiloxane - in an amount greater than 0.7% by weight is inserted, the physical and mechanical properties of such a layer of coating are significantly impaired. If the content of a thermoplastic polymer or a mixture of two such polymers is greater than 99.7% by weight and the polyorganosiloxane is less than 0.3% by weight, the effect of improving the new, modified structure is not observed.

Low density polyethylene may be used as the selected thermoplastic polymer and polymethylsiloxane as polyorganosiloxane.

Super-high molecular weight polyethylene and polyorganosiloxane polymethylsiloxane can be used as the selected thermoplastic polymer. Polypropylene and polyorganosiloxane - polyphenylsiloxane can also be used as the selected thermoplastic polymer.

As the selected thermoplastic polymer, it is also possible to use a copolymer of propylene with vinyl acetate, such as polyorganosiloxane - polymethylphenylsiloxane.

Polyvinyl chloride and polyorganosiloxane polyethylphenylsiloxane may also be used as the selected thermoplastic polymer.

Thermoplastic polyurethane may be used as the selected thermoplastic polymer and polymethylphenylsiloxane as the polyorganosiloxane.

In addition, low density polyethylene can be used as a mixture of two thermoplastic polymers

5-95% by weight and polypropylene in an amount of 4.3-94.7% by weight, relative to the total weight of the inner layer of the shell, where polyphenylsiloxane is used as polyorganosiloxane. The aforementioned component ratio makes it possible to produce a multicomponent homogeneous system whose properties are not identical to those of the individual thermoplastic polymers contained in this structure and have increased strength with sufficient elasticity. If the structure contains less than 5% by weight of low density polyethylene and polypropylene is more than 94.7% by weight, the multi-component homogeneous system has the properties of modified polypropylene, but if the content in the mixture is such that low density polyethylene is less than 95% by weight and less than 4.3% by weight of polypropylene, however, the system has the properties of modified polyethylene.

As a mixture of two selected thermoplastic polymers, a mixture of super-high molecular weight polyethylene in an amount of 5-95% by weight and a propylene copolymer with vinyl acetate at a content of 4.3-94.7% by weight relative to the total weight of the inner layer of the tube sheath can be used, however, as polyorganosiloxane, polymethylsiloxane can be used. The aforementioned ratio of constituents enables the production of a multicomponent homogeneous system with properties different from those of the individual thermoplastic polymers included in this structure: increased chemical resistance in combination with high strength and sufficient elasticity. If the content of super-high molecular weight polyethylene in the system is less than 5% by weight of propylene copolymer and more than 94.7% by weight with vinyl acetate, such system has the properties of modified propylene copolymer with vinyl acetate; if the content of super-high molecular weight polyethylene in the mixture is above 95% by weight, and the content of propylene copolymer is less than 4.3% by weight together with vinyl acetate, then the system has the properties of modified super-high molecular weight polyethylene.

As a mixture of the two selected thermoplastic polymers, it is recommended to use a mixture of polyvinyl chloride in an amount of 595% by weight and thermoplastic polyurethane in an amount of 4.3 94.7% by weight, relative to the weight of the inner layer of the wrapper, and polymethylphenylsiloxane or polyethylphenyloxy or polyethylphenylsiloxane.

δ

The presented component ratio makes it possible to produce multicomponent homogeneous systems with properties different from the properties of the individual thermoplastic polymers included in this structure: high abrasion resistance of the material in conjunction with increased adhesion to other substances, especially synthetic reinforcing material with sufficient elasticity . If the thermoplastic polyurethane content of the system is less than 5% by weight and the polyvinyl chloride content is higher than 94.7% by weight, the system has the properties of modified polyvinyl chloride; and having a content of more than 95% by weight of thermoplastic polyurethane and less than 4.3% by weight of polyvinyl chloride content, the system has the properties of modified thermoplastic polyurethane.

At least one additional reinforcement layer may be used in the manufacture of the tube jacket, which is placed parallel to the outer tubular layer of the jacket and the main reinforcement layer.

It is recommended that the main reinforcement layer be made of synthetic non-woven fibrous material.

Separate edges of the inner layer of the wrapper can be hermetically connected to the main reinforcing layer of the wrapper over the edges or by overlapping them.

This is also achieved by the fact that, in accordance with the method of insertion of the jacket on the inner surface of the pipe, the individual layers are assembled outside it. The outer layer is intended to adhere to the inner surface of the tube, and the inner layer of the envelope is separated from the previous by a main reinforcement layer impregnated with a thermally cured polymeric bond, so that ultimately an unfinished product of the jacket is inserted, which is inserted inside the tube. , and then a pressurized heat carrier is inserted into the cavity of the inner tube casing. The heat and hardening of the bonds cause the main reinforcement layer to bond to the inner layer of the sheath so that the two bond to one another over the surface. The inner layer of the sheath consists of a thin layer obtained from a multi-component homogeneous system, where the molten at least one polymer is selected from the group of thermoplastic polymers whose relative elongation coefficient is not less than 200% and the melting point is not below 100 ° C. Said system also comprises a structural modifier of the selected polymer. By sealing the side edges of the layers together with the reinforcement layer, we get a two-layer, unfinished part of the coat, which is placed inside with respect to the outer layer of such a covering.

A group of thermoplastic polymers whose relative elongation coefficients are not less than 200% and whose melting points are not below 100 ° C may include low density polyethylene, super-high molecular weight polyethylene, polypropylene, propylene copolymer with vinyl acetate, polyvinyl chloride and thermoplastic polyurethane, selected polymers represented by polyorganosiloxane selected from the group consisting of polymethylsiloxane, polymethylphenylsiloxane, polyphenylsiloxane and polyethylphenylsiloxane.

The inner layer of the jacket tube may also be made from a multi-component homogeneous system by mixing molten one or two polymers selected from said group of thermoplastic polymers in an amount of 99.3-99.7% by weight relative to the total weight of the inner jacket and polyorganosiloxane in an amount of 0.3 - 0.7% by weight relative to the total weight of the inner sheath.

Low density polyethylene can be used as the selected thermoplastic polymer and polymethylsiloxane as polyorganosiloxane.

Super-high molecular weight polyethylene can be used as the selected thermoplastic polymer and polymethylsiloxane as polyorganosiloxane.

Polypropylene and polyorganosiloxane polyphenylsiloxane may also be used as the selected thermoplastic polymer.

Polyvinyl chloride and polyorganosiloxane polymethylphenylsiloxane may also be used as the selected thermoplastic polymer.

As a mixture of two selected thermoplastic polymers, a mixture of super-high molecular weight polyethylene in the amount of 5-95% by weight and a propylene copolymer with vinyl acetate in the amount of 4.3-94.7% by weight relative to the total weight of the inner layer of the tube sheath can be used, and as polyorganosiloxane - polyphenylsiloxane.

In addition to the mixture of two selected thermoplastic polymers, a mixture of super-high molecular weight polyethylene in the amount of 5-95% by weight and a copolymer of propylene t vinyl acetate in the amount of 4.3-94.7% by weight, relative to the weight of the inner sheath, and as polyorganosiloxane polymethylsiloxane.

As a mixture of the two selected thermoplastic polymers, a mixture of polyvinyl chloride in an amount of 5-95% by weight and thermoplastic polyurethane in an amount of 4.3-94.7% by weight, relative to the weight of the inner envelope, can be used, and polymethylphenylsiloxane or polyethylphenylsiloxane is used as the polyorganosiloxane.

It is recommended to place at least one additional reinforcement layer between the outer layer of the sheath and the main reinforcement layer. It is also recommended that the main reinforcement layer be made of synthetic fibrous non-woven material.

It is also advisable to attach said layer with the main reinforcement layer hermetically along the edges or by overlapping the lateral edges.

We have also achieved that a two-layer semi-fabricated tube casing comprising a reinforcement layer coupled to an inner coating layer of the inner tube surface made from a thermoplastic polymeric material, which according to the invention is formed from a multi-component homogeneous system comprising at least one polymer selected from the group of thermoplastic polymers having a relative elongation coefficient of not less than 200% and a melting point below 100 ° C, together with a structural modifier of the selected polymer. Thus, the inner layer of the envelope and the associated reinforcement layer are assembled such that they are interrupted in at least one location coaxially with respect to the axis of such a semi-finished product, and the two interrupted edges are hermetically interconnected and as such form a coaxially arranged part of the entire envelope. A group of thermoplastic polymers whose relative elongation coefficients are not less than 200% and whose melting points do not fall below 100 ° C may contain low density polyethylene, super-high molecular weight polyethylene, polypropylene, propylene copolymer with vinyl acetate, polyvinyl chloride and thermoplastic, structural modifier of the selected polymer represented by a group of polyorganosiloxanes selected from the group consisting of polymethylsiloxane, polymethylphenylsiloxane, polyphenylsiloxane and polyethylphenylsiloxane.

The inner layer of the tube sheath may be made of a multi-component homogeneous system containing at least one polymer and a mixture of two polymers selected from said group of thermoplastic polymers in an amount of 99.3 99.7% by weight relative to the total weight of the inner layer of the tube sheath , and polyorganosiloxane in an amount of 0.3 0.7% by weight relative to the total weight of the inner layer of the tube sheath.

Low density polyethylene can be used as the selected thermoplastic polymer and polymethylsiloxane as polyorganosiloxane.

Super-high molecular weight polyethylene and polyorganosiloxane polymethylsiloxane can be used as the selected thermoplastic polymer.

Polypropylene and polyorganosiloxane - polyphenylsiloxane can be used as the selected thermoplastic polymer.

The selected thermoplastic polymer can also be used as a copolymer of propylene with vinyl acetate and as polyorganosiloxane - polymethylphenylsiloxane.

Polyvinylchloride and polyorganosiloxane polyethylphenylsiloxane may be used as the selected thermoplastic polymer.

Thermoplastic polyurethane and polyorganosiloxane polymethylphenylsiloxane may also be used as the selected thermoplastic polymer.

In addition, a mixture of two selected thermoplastic polymers can be used a mixture of low density polyethylene in the amount of 5-95 wt.% And propylene in the amount

4.3 to 94.7% by weight, relative to the weight of the inner sheath, and as polyorganosiloxane - polyphenylsiloxane.

As a blend of two selected thermoplastic polymers, a mixture of super-high molecular weight polyethylene in an amount of 5-95% by weight and a propylene copolymer with vinyl acetate in an amount of 4.3-94.7% by weight relative to the weight of the inner layer of the envelope can also be used, and use polymethylsiloxane as polyorganosiloxane.

As a mixture of the two selected thermoplastic polymers, it is desirable to use a mixture of polyvinyl chloride in an amount of 5 95% by weight and a thermoplastic polyurethane in an amount of 4.3 94.7% by weight, relative to the weight of the inner layer of the wrapping tube. However, polyorganosiloxane may be polymethylphenylsiloxane or polyethylphenylsiloxane. It is recommended that the reinforcement layer be made of synthetic non-woven fibrous material.

Separate edges of the inner tubular layer of the tube envelope may be hermetically connected to the reinforcing layer by contacting the edge with the edge or by overlapping the two edges with such a partially completed sheath.

The object of the present invention is also achievable by the process for the manufacture of said two-layer semi-finished product of said inner tube surface, by which the inner layer of the tube outer layer is made on the basis of a thermoplastic polymeric material in accordance with the invention, wherein the inner a layer of said sheath made as a pole made from a multi-component homogeneous system by mixing at least one liquefied polymer selected from the group of thermoplastic polymers having a coefficient of relative elongation of not less than 200% and melting points not below 100 ° C, together with a structural modifier of the selected polymer . The surface of the coating layer is bonded, and the lateral edges together with the reinforcement layer are hermetically sealed, resulting in a two-layer partially finished portion of the coating from a coaxially positioned and interconnected reinforcement layer and an inner layer of the tube wrapper.

A group of thermoplastic polymers, whose relative elongation coefficient does not drop below 200% and whose melting points are not below 100 ° C, may contain low density polyethylene, super-high molecular weight polyethylene, polypropylene, propylene copolymer with vinyl acetate, polyvinyl chloride and thermoplastic polyurethane, structural modifier of the selected polymer represented as polyorganosiloxane selected from the group consisting of polymethylsiloxane, polymethylphenylsiloxane, polyphenylsiloxane and polyethylphenylsiloxane.

The inner layer of the tube sheath may also be obtained from a multi-component homogeneous system by mixing molten at least one polymer or a mixture of two polymers selected from said group of thermoplastic polymers and present in amounts of 99.3-99.7% by weight relative to the weight of the inner layer of the sheath, and polyorganosiloxane in an amount of 0.3-0.7% by weight, relative to the total weight of the inner layer of the sheath.

Low density polyethylene can be used as the selected thermoplastic polymer and polymethylsiloxane as polyorganosiloxane.

Super-high molecular weight polyethylene and polyorganosiloxane - polymethylsiloxane can be used as the selected thermoplastic polymer.

Polypropylene and polyorganosiloxane - polyphenylsiloxane can also be used as the selected thermoplastic polymer. The selected thermoplastic polymer can be used as a copolymer of propylene with vinyl acetate and as polyorganosiloxane - polymethylsiloxane.

Polyvinyl chloride can be used as the selected thermoplastic polymer and polyethylphenylsiloxane as polyorganosiloxane.

Thermoplastic polyurethane and polyorganosiloxane polymethylphenylsiloxane may be used as the selected thermoplastic polymer.

As a mixture of the two selected thermoplastic polymers, a low density polyethylene mixture of 5-95% by weight and polypropylene of 4.3 94.7% by weight relative to the weight of the inner layer of the wrapper may be used, as polyorganosiloxane as polyphenylsiloxane.

As a mixture of two selected thermoplastic polymers, a mixture of super-high molecular weight polyethylene in the amount of 5-95% by weight and a copolymer of propylene with vinyl acetate in the amount of 4.3-94.7% by weight, relative to the weight of the inner layer of the tube shell, can be used as polyorganosiloxane can be used polymethylsiloxane As a mixture of two selected thermoplastic polymers, it is also recommended to use a mixture of polyvinyl chloride in an amount of 5-95% by weight and thermoplastic polyurethane in an amount of 4.3 - 94.7% by weight, relative to the weight of the inner layer of the wrapper, as polyorganosiloxane and polymethylphenylsiloxane or polyethylphenylsiloxane. It is recommended that the reinforcement layer be made of synthetic fibrous non-woven material.

In addition, the edges of the glued inner layer of the envelope and the reinforcement layers on the sides must be hermetically sealed, or they may be joined by overlaps.

The substantiation of all boundaries, whether in the process of using said coat and in the two-layer partially completed part of the coat and in the process of making this work, is the same as in the following patent claims of the patented coat.

The patented coat also has some advantages:

- high operational power and tightness;

- the complete absence of defects (wrinkles, deflections, etc.) on the inner surface where they are formed by the inner layer of the sheath, as well as the complete absence of peeling of said coat, which allows the fluid to be transported uniformly through the tubes without additional energy loss;

- resistance to abrasive wear;

- stability in the action of the chemically active medium and water, which significantly increases the durability and reliability of the jacket and allows it to be used in tubes for various purposes.

The patented process for inserting a patented jacket allows this to be introduced and has some of the advantages described above due to the use of a two-layer partially finished part of the jacket, which consists of an inner sheath and a main reinforcement layer, which are connected together, which facilitates multi-layer partially completed assembly technology of the jacket and prevents the inner layer of the entire wrapping from being bent, twisted and stretched while transporting it to the inside of the pipe.

The two-layer semi-finished product of the entire tube sheath, according to the present invention, is characterized by a high degree of adhesion of the inner layer of the sheath to the main reinforcement layer, high strength and tightness, which allows it to be used in the manufacture of the sheath with the aforementioned advantages, in accordance with the procedure described in of this invention.

The described process of manufacturing said two-layer partially completed work gives the possibility of producing such partially completed work with the aforementioned advantages.

Short description of the pictures

The invention is further explained by the description of the individual use cases and by the accompanying drawings.

Figure 1 shows the jacket used according to the method of the invention on the inner surface of the tube in axonometry

Fig. 2 same as Fig. 1, only in cross section and enlarged;

Figure 3 shows detail A of Figure 2, on a larger scale; Figure 4 shows another embodiment shown in Figure 3;

Figure 5 shows another embodiment shown in Figure 3;

Figure 6 shows another embodiment of the jacket which is the subject of the present invention, applied by the process of the present invention, in cross-section;

Figure 7 shows the detail B of Figure 6, in enlarged scale; Figure 8 shows another embodiment of the jacket which is the subject of the present invention, applied by the process of the present invention, in cross-section;

Fig. 9 shows one of the possible embodiments of the bilayer semi-finished coat applied by the cross-sectional view of the present invention;

Figure 10 shows one embodiment of said two-layer semi-finished coat as in Figures 1 and 2 obtained by the cross-sectional view of the present invention according to the present invention;

Figure 11 shows a second embodiment of said two-layer semi-finished coat, as in Figure 6, obtained by the cross-sectional view of the present invention.

A preferred embodiment of the invention

The inner tube surface of the tube (1) (Figures 1 and 2) includes two coaxially arranged tubular sheaths (2 and 3) made on the basis of thermoplastic polymeric materials, the outer of which (2), connected to the inner surface of the tube, the second inner (3 ) is separated from this by a coaxial main (4) and an additional (5) reinforcement layer impregnated with a cured polymeric bond. The inner tubular sheath (3) is formed from a multicomponent homogeneous system containing at least one polymer selected from the group of thermoplastic polymers having a coefficient of relative elongation of not less than 200% and a melting point not below 100 ° C, and is further located here structural modifier of the selected polymer. The inner sheath layer (3) and the main reinforcement layer (4) are thus implemented, coaxially separated in at least one place, and the separate edges (6) and (7) interconnected, so that this sheath (3) forms monolithic structure with main reinforcement layer (4).

A group of thermoplastic polymers having a coefficient of relative elongation of less than 200% and melting points higher than 100 ° C contains low-density polyethylene, super-molecular molecular polyethylene, polypropylene, propylene copolymer with vinyl acetate, polyvinyl chloride and thermoplastic polyurethane, however, the polyorganosiloxane is selected from the group consisting of polymethylsiloxane, polymethylphenylsiloxane, polyphenylsiloxane and polyethylphenylsiloxane.

The inner layer of the sheath (3) is formed from a multicomponent homogeneous system containing one polymer or a mixture of two polymers selected from the said group of thermoplastic polymers in an amount of 99.3 - 99.7% by weight relative to the total weight of the inner sheath and polyorganosiloxane in 0.3 to 0.7% by weight relative to the total weight of the inner sheath (3).

Low density polyethylene can be used as the selected thermoplastic polymer and polymethylsiloxane as polyorganosiloxane.

Super-high molecular weight polyethylene can be used as the selected thermoplastic polymer and polymethylsiloxane as polyorganosiloxane.

Polypropylene can be used as the selected thermoplastic polymer and polyphenylsiloxane as polyorganosiloxane. The selected thermoplastic polymer can also be used as a copolymer of propylene with vinyl acetate and as polyorganosiloxane - polymethylphenylsiloxane.

Polyvinylchloride and polyorganosiloxane polyethylphenylsiloxane can be used as the selected thermoplastic polymer, as well as thermoplastic polyurethane in the case of the selected polymer and polyorganosiloxane - polymethylphenylsiloxane.

In addition, a mixture of low density polyethylene in the amount of 5-95% by weight and polypropylene in the amount of 4.3-94.7% by weight, relative to the weight of the inner layer of the tube sheath (3), as polyorganosiloxane, can be used as a mixture of the two selected thermoplastic polymers. and polyphenylsiloxane.

As a mixture of two selected thermoplastic polymers, a mixture of super-high molecular weight polyethylene in the amount of 5-95% by weight and a copolymer of polypropylene with vinyl acetate in the amount of 4.3-94.7% by weight relative to the weight of the inner sheath (3) can be used, as polyorganosiloxane, polymethylsiloxane.

As a mixture of the two selected thermoplastic polymers, a mixture of polyvinyl chloride in the amount of 5-95% by weight and thermoplastic polyurethane in the amount of 4.3 - 94.7% by weight, relative to the weight of the inner layer (3), and (10) as polyorganosiloxane - polymethylphenylsiloxane or polyethylphenylsiloxane.

The outer sheath (2) may be made of polyethylene or a multilayer polyethylene - polyamide layer.

The main reinforcement layer (4) is made of synthetic non-woven fibrous material, for example, of a synthetic felt based on polyester or / and polypropylene fibers.

The additional reinforcement layer (5) is made of a synthetic felt based on polyester and / or polypropylene fibers, a glass cloth, a glass knit, a combination of glass materials, a thermoplastic mesh or a carbon fiber net.

For the polymer bond, polyester, epoxy, epoxy polyester bond, polyester bond, thickened aerosil and / or magnesium oxide may be used.

Separate edges (6 and 7) of the inner layer of the sheath (3), together with the main reinforcing layer (4) are hermetically connected through the edges, as shown in Figures 1, 2 and 3. The area of connection (sewing or welding) of the edge (6) (Figure 3) and (7) is sealed or welded the axial axis of the tube sheath (Figure 1) with a strip (8) of a substance identical to the substance of which the inner layer of the sheath (3) is composed.

Figures 4 and 5 show two more variants of the implementation of the hermetic connection of the unbound edges (6 and 7) of the inner layer of the sheath (3), together with the main reinforcement layer (4), which are connected here by the edge contact.

In Figure 4, the edges (6 and 7) are covered by a lining (9) extending coaxially to the axis of the sheath and, for example, of fluoroplastics, synthetic fabric, fiberglass and then covered with tape (8).

In Fig. 5, the area of connection (sewing or welding) of the edges (6 and 7) is hermetically sealed, or welded, the coaxial axis of the sheath with a pattern strip (10) having a T-shaped cross-section identical to the material of the inner layer of the pipe sheath ( 3).

The separated edges (6 and 7) of the inner layer (3), together with the main reinforcing layer (4) can also be hermetically closed by the overlapping process, as shown in Figures 6 and 7. Therefore, the lateral edges (6) (Fig. 7 ) and (7) are sewn or welded but overlap on the axis of the envelope and the connection area (sewn or welded) is welded with a strip (8) of a substance identical to that of the inner layer of the envelope (3). Figure 8 shows a variant of using a tube jacket, where an additional reinforcement layer (11) is visible, placed between the additional reinforcement layer (5) and the outer layer of the sheath (2). The reinforcement layer (11) is made of a synthetic felt based on polyester and / or polypropylene fibers, glass fibers, glass knitting, combinations of glass materials, thermoplastic fibers or carbon fiber nets.

Figure 9 shows a version of a tube sheath in which, in addition to the reinforcing layers (5 and 11), another additional reinforcing layer (12) is inserted, inserted between the layer (11) and the outer layer of the sheath (2) and made of synthetic squeegee made of polyester and / or polypropylene fibers, fiberglass, fiberglass, a combination of glass material, a thermoplastic fiber net or a carbon fiber net.

The process for inserting the jacket onto the inner surface of the tube according to the present invention is carried out in such a way that, initially, outside the tube 1 (Figures 1 and 2), the tubular layers of the jacket (2 and 3) are made on the basis of a thermoplastic polymer, are positioned coaxially outside this tube. The outer layer (2) is intended to be attached to the inner surface of the tube (1), and the inner layer (2) is separated therefrom by the main (4) and an additional reinforcing (5) layer of the wrapper. The reinforcement layer is impregnated with a thermally curable binder. In this way a partially finished part of the jacket is obtained, which is then inserted into the tube (1), after which a heat carrier is inserted into the inside of this tube, which results in the subsequent hardening of the binder. Prior to assembling the non-impregnated multilayer partially completed sheath, the pole of the material forming the main reinforcing layer (4) is coupled to the polo of the material forming the inner layer of the sheath (3) and made of a multi-component homogeneous system by mixing molten at least one polymer selected from a group of thermoplastic polymers having relative elongation coefficients greater than 200% and melting points above 100 ° C, and a structural modifier of the selected polymer. Thereafter, the lateral edges (6 and 7) of the inner layer of the sheath, together with the main reinforcing layer (4) attached thereto, are hermetically joined together to give a two-layer, partially finished part of the whole sheath, or semi-finished product, which is presented in Figure 10, where a coaxially and interconnected reinforcement layer (4) and an inner tubular layer (3) are arranged, followed by a further two-layer, partially completed sheath, together with an additional reinforcement layer (5) positioned along the coaxial axes with respect to the outer layer of the wrapper (2).

A group of thermoplastic polymers having a coefficient of elongation greater than 200% and melting points exceeding 100 ° C include low density polyethylene, super-high molecular weight polyethylene, polypropylene, propylene copolymer with vinyl acetate, polyvinyl chloride and thermoplastic polyurethane, in addition to these include the modifiers of the selected polymer are a group of polyorganosiloxanes, including polymethylsiloxane, polymethylphenylsiloxane, polyphenylsiloxane and polyethylphenylsiloxane.

The inner layer of the sheath (3) is obtained from a multi-component homogeneous system by mixing at least one molten polymer or a mixture of two polymers selected from said group of thermoplastic polymers in an amount of 99.3-99.7% by weight relative to the total weight of the inner layer of the sheath together with polyorganosiloxane in an amount of 0.3-0.7% by weight relative to the total weight of the inner sheath (3).

Low density polyethylene can be used as the selected thermoplastic polymer and polymethylsiloxane as polyorganosiloxane.

Super-high molecular weight polyethylene can also be used as the selected thermoplastic polymer and polymethylsiloxane as polyorganosiloxane.

Polypropylene may be used as the selected thermoplastic polymer and polyphenylsiloxane as polyorganosiloxane. The selected thermoplastic polymer can be used as a copolymer of propylene with vinyl acetate, and polyorganosiloxane as polymethylphenylsiloxane.

Polyvinyl chloride can be used as the selected thermoplastic polymer and polyethylphenylsiloxane as polyorganosiloxane.

Thermoplastic polymer is also thermoplastic urethane where polymethylphenylsiloxane can be used as a polyorganosiloxane.

In addition, low density polyethylene in the amount of 5-95% by weight and polypropylene in the amount of 4.3 94.7% by weight relative to the total weight of the inner shell (3) can be used as a mixture of the two selected thermoplastic polymers, as polyorganosiloxane. polyphenylsiloxane.

A mixture of two selected thermoplastic polymers can also be used with a mixture of super-high molecular weight polyethylene in an amount of 5-95% by weight, and a copolymer of propylene with vinyl acetate in an amount of 4.3-94.7% by weight, relative to the weight of the inner sheath (3) , and polyethylphenylsiloxane is used as the polyorganosiloxane.

As a blend of two selected thermoplastic polymers, a polyvinyl chloride blend of 5 can also be used

- 95% by weight and thermoplastic polyurethane in an amount of 4,3

- 94,7% by weight relative to the weight of the inner sheath (3), using polymethylphenylsiloxane or polyethylphenylsiloxane as polyorganosiloxane.

The outer layer of the sheath (2) is constructed of polyethylene or a multi-layer polyethylene-polyamide layer.

The main reinforcement layer (4) is made of synthetic fibrous non-woven material such as, for example, synthetic felt based on polyester and / or polypropylene fibers.

The additional reinforcement layer (5) is constructed of a synthetic felt based on polyester and / or polypropylene fibers, glass fibers, glass knitting, a combination of glass materials, a thermoplastic fiber network or a carbon fiber network.

Polyester, epoxy, epoxy polyester binder, aerosil and / or magnesium reinforced polyester binder are used as the polymer binder.

According to one embodiment of the process of the present invention, the side edges (6 and 7) of the envelope layer, together with the main reinforcement layer (4) previously bonded, are coupled to the edge contact as shown in Figures 1 to 5 , according to the second version, however, said edges overlap as shown in Figures 6 and 7.

Figures 8 and 9 show variants of the present invention, where another additional reinforcement layer (11) is placed between the additional reinforcing layer (5) and the outer layer of the wrapper (2), and in addition, a fourth reinforcing layer (12) ), which is placed at the top of the amplifier layer (11). The layers (11 and 12) are made as described above.

Although the coat implementation variants and method for using this according to the present invention have already been described above and where variants with one, two or three additional reinforcement layers and an inner layer of the former associated with the prior art have been presented separated at only one location by the coaxial axis of such a sheath, this does not limit the scope of the present invention formulated in claims.

The partially completed part of the coat mentioned above and the process for making this according to the invention are described below. The patented two-layer semi-finished product in FIGS. 10 and 11 of the aforementioned envelope in FIGS. 1 to 9 of the inner surface of the tube comprises a reinforcement layer 4 connected to the inner layer of the envelope (3) and made on the basis of thermoplastic polymeric material. The inner layer of the sheath (3) is formed by a multi-component homogeneous system containing at least one polymer selected from the group of thermoplastic polymers having a relative elongation coefficient greater than 200% and a melting point above 100 ° C, and a structural modifier of the selected polymer. The inner layer of the sheath (3) is coupled with the reinforcement layer (4) so as to be interrupted in at least one location along the parallel axis of the sheath, and these separate edges (6 and 7) are hermetically sealed together, forming along the parallel axles positioned and interconnected reinforcement layer (4) and inner layer of envelope (3). A group of thermoplastic polymers having relative elongation coefficients exceeding 200% and melting points exceeding 100 ° C include low density polyethylene, super-high molecular weight polyethylene, polypropylene, a copolymer of propylene with vinyl acetate, polyvinyl chloride and thermoplastic polyurethane, as well as structured polyurethane, a group of polyorganosiloxanes is used, including polymethylsiloxane, polymerylphenylsiloxane, polyphenylsiloxane and polyethylphenylsiloxane.

The inner layer of the sheath (3) is made up of a multi-component homogeneous system containing one polymer or a mixture of two polymers selected from the above group of thermoplastic polymers in an amount of 99.3 - 99.7% by weight relative to the total weight of the inner layer of the sheath, and polyorganosiloxane in an amount of 0.3-0.7% by weight relative to the total weight of the inner layer of the wrapper (3).

Low density polyethylene can be used as the selected thermoplastic polymer and polymethylsiloxane as polyorganosiloxane.

Super-high molecular weight polyethylene can also be used as the selected thermoplastic polymer and polymethylsiloxane as polyorganosiloxane.

Polypropylene can be used as the selected thermoplastic polymer and polyphenylsiloxane as polyorganosiloxane. As the selected thermoplastic polymer, a copolymer of propylene with vinyl acetate can be used, and polyorganosiloxane as polyethylphenylsiloxane.

Polyvinyl chloride can be used as the selected thermoplastic polymer, poly-organosiloxane as polyethylphenylsiloxane as well as thermoplastic polyurethane in place of thermoplastic polyurethane, and polymethylphenylsiloxane as poly-organosiloxane.

In addition, low density polyethylene in the amount of 5-95% by weight and polypropylene in the amount of 4.3 94.7% by weight can be used as a mixture of the two selected thermoplastic polymers, relative to the total weight of the inner layer of the wrapper, and polyphenylsiloxane is used as the polyorganosiloxane.

As a mixture of two selected thermoplastic polymers, a mixture of super-high molecular weight polyethylene in the amount of 5-95% by weight and a copolymer of propylene with vinyl acetate in the amount of 4.3-94.7% by weight, relative to the weight of the inner layer of the wrapper, can also be used. and polyorganosiloxane uses polyethylphenylsiloxane.

As a blend of two selected thermoplastic polymers, a polyvinyl chloride blend of 5 can also be used

- 95% by weight and thermoplastic polyurethane in an amount of 4,3

- 94,7% by weight, relative to the weight of the inner layer of the wrapper, using polymethylphenylsiloxane or polyethylphenylsiloxane as polyorganosiloxane.

The reinforcement layer (5) is made of synthetic non-woven fibrous material, for example, of synthetic felt obtained on the basis of polyester and / or polypropylene fibers.

The separate edges (6 and 7) of the inner tubular layer of the sheath (3) connected to the reinforcing layer (4) are sealed with each other to the coaxial axes, as shown in Figure 10 and secured by sewing or welding.

The separate edges (6 and 7) of the inner tubular layer of the wrapper (3) connected to the reinforcing layer (4) can be hermetically connected to each other by overlapping in the axis of the bilayer semi-finished product, as shown in Figure 11, then such edges are sewn or welded at this point, and then a strip (8) is welded to this area from the inner surface of the inner layer of the wrapper (8), the material of which is identical to the material forming the inner layer of the wrapper (3).

The method for manufacturing a two-layer semi-finished product of said inner tube surface coat according to the present invention consists of an inner tube tube layer (3) made on the basis of a thermoplastic polymer material and connected to the reinforcement layer (4). The inner tubular layer (3) is made of a sheet of film obtained from a multicomponent homogeneous system by mixing one or two polymers in a molten state, where the polymers are selected from the group of thermoplastic polymers whose relative elongation coefficient does not fall below 200% and the boiling points are greater than 100 ° C and the structural modifier of the selected polymer. Such a pole of the film is then bonded to the polo of the material forming the reinforcement layer (4), and then the lateral edges (6 and 7) of this pole of the film, together with the associated reinforcing layer (4), are hermetically connected to each other, thereby obtaining a two-layer partially finished portion of the jacket, arranged parallel to the axis of the axle and connected to the reinforcing layer (4) and the inner tubular layer of the sheath (3).

A group of thermoplastic polymers whose relative elongation coefficients do not fall below 200% and whose melting points reach above 100 ° C include low density polyethylene, super-high molecular weight polyethylene, polypropylene, propylene copolymer with vinyl acetate, polyvinyl chloride and thermoplastic polyurethane polyurethane, of the selected polymer, polyorganosiloxanes are used, including polymethylsiloxane, polymethylphenylsiloxane, polyphenylsiloxane and polyethylphenylsiloxane.

The inner layer of the sheath (3) is made by means of a multi-component homogeneous system by mixing one or two molten polymers selected from the above-mentioned group of thermoplastic polymers in an amount of 99.3 99.7% by weight relative to the total weight of the inner layer of the sheath , and polyorganosiloxane in an amount of 0.3-0.7% by weight relative to the total weight of the inner layer of the sheath (3).

Low density polyethylene can be used as the selected thermoplastic polymer and polymethylsiloxane as polyorganosiloxane.

Super-high molecular weight polyethylene can also be used as the selected thermoplastic polymer and polymethylsiloxane as polyorganosiloxane.

Polypropylene can be used as the selected thermoplastic polymer and polyphenylsiloxane as polyorganosiloxane. As the selected thermoplastic polymer, a copolymer of propylene with vinyl acetate can be used, and polyorganosiloxane as polyethylphenylsiloxane.

Polyvinyl chloride can be used as the selected thermoplastic polymer, poly-organosiloxane as polyethylphenylsiloxane as well as thermoplastic polyurethane in place of thermoplastic polyurethane, and polymethylphenylsiloxane as poly-organosiloxane.

In addition, low density polyethylene in the amount of 5-95% by weight and polypropylene in the amount of 4.3 94.7% by weight can be used as a mixture of the two selected thermoplastic polymers, relative to the total weight of the inner layer of the wrapper, and polyphenylsiloxane is used as the polyorganosiloxane.

As a mixture of two selected thermoplastic polymers, a mixture of super-high molecular weight polyethylene in the amount of 5-95% by weight and a copolymer of propylene with vinyl acetate in the amount of 4.3-94.7% by weight, relative to the weight of the inner layer of the wrapper, can also be used. and polyorganosiloxane uses polyethylphenylsiloxane.

As a blend of two selected thermoplastic polymers, it is also possible to use a mixture of polyvinyl chloride in an amount of

5-95% by weight and thermoplastic polyurethane in an amount

4.3 to 94.7% by weight relative to the weight of the inner layer of the envelope, using polymethylphenylsiloxane or polyethylphenylsiloxane as polyorganosiloxane.

The reinforcement layer (4) is made of synthetic fibrous non-woven material, for example synthetic felt obtained on the basis of polyester and / or polypropylene fibers.

The lateral edges (6 and 7) of the envelope, which are connected to the reinforcing layer 4, are sealed to one another by contacting the edges, as shown in Figure 10, by welding, where a material strip (8) is then welded to the inner layer of the envelope. , identical to the material of the inner layer of the sheath (3).

Although embodiments of the patented two-layer semi-finished coat according to the present invention have already been described, a process for producing this partially completed work has also been presented, wherein the implementation of the inner jacket together with the reinforcement layer is separated from the previous only one position on the parallel axis does not limit our rights as formulated in the claims.

Below are some examples of implementation of a patented coat used by the method according to the invention, which will also detail the patented semi-finished coat obtained by the method according to the invention.

Example 1

Outside of tube 1 (Figures 1 and 2), the outer tubular layer of the sheath (2) of thermoplastic material, especially polyethylene, and the inner tubular layer of the sheath (3) are coaxially positioned. In addition, a main reinforcement layer (4) is inserted here, inserted between the outer (2) and the inner layer (3), forming with them a two-layer partially finished part of the tube jacket.

For the manufacture of the inner tube sheath (3) of such a semi-finished product, a pole of material obtained from a thermoplastic polymeric material, or a homogeneous system, obtained by mixing molten low density polyethylene in an amount of 99.7% by weight relative to the total weight of the inner layer, is used (3), and the structural modifier of the selected polymer-polymethylsiloxane in an amount of 0.3% by weight, relative to the total weight of the inner layer of the wrapper (3). The half of the material is joined by rolling from the polo reinforcement layer (4) of synthetic fibrous non-woven material, made of synthetic felt based on polyester fibers; the lateral edges (6 and 7) of the connected poles are sewn so that the edges contact each other, and said area is closed or welded on the side of the inner layer of the wrapper (3) by a strip (8) made of the same material as the inner layer sheath (3).

This gives a two-layer partially definitive part of the entire tube sheath (Figure 10).

An additional fiberglass reinforcement layer (5) is placed between the outer tubular layer (2) and the main reinforcement layer (4).

The main layer (4) and the additional reinforcement layer (5) are impregnated with a binder formed on the basis of unsaturated polyester resins.

The structure of the multilayered partially finished part of the jacket thus obtained is inserted into the interior of the pipe (1), which is being repaired or re-erected, and is inserted by means of special devices and installations (not shown in the figures). Deforming, twisting or destroying the inner layer of the envelope (3) is avoided due to the connection of the latter with the main reinforcing layer (4) in the described two-layer semi-finished product (Figure 10) made in the manner that is the subject of the present invention.

The insertion of the heat carrier into the inner layer of the sheath (3) and the curing of the binder are carried out under the following conditions:

- heat carrier - saturated water vapor

- temperature of heat carrier - 100 ° C

- pressure 0,05 MPa

- Hardening time - 2 hours.

The result is a monolithic structure of the inner layer of the sheath (3), together with the main reinforcing layer (4), which leads to a significant increase in the quality of the jacket used by this process and, consequently, an increase in the operational properties of the pipe due to the high physical and mechanical characteristics of the jacket, its hydro-stability. and chemical resistance:

breaking pressure at turn, MPa: 140 - 200; peeling resistance, MPa: 8 - 12; water absorption,% by weight: 0.4 - 0.5;

resistance to 10% H ₂ SO ₄ - destruction of the patented coat does not occur during the 1 month exposure at 20 22 ° C.

Example 2

The process is carried out similarly to Example 1.

The same materials as in Example 1 are used for the jacket, with the exception of the material of the inner layer of the sheath (3) and the additional reinforcement layer (5).

The inner layer of the sheath (3) is formed by a homogeneous system containing low density polyethylene in an amount of 99.5% by weight relative to the total weight of the inner layer of the sheath (3) and polymethylsiloxane in an amount of 0.5% by weight relative to the mass of the inner layer of the sheath (3).

The additional reinforcement layer (5) is made of a synthetic polyester fiber based felt.

Between the additional reinforcement layer (5) (Figure 8) and the coaxially positioned outer layer of the sheath (2), an additional reinforcing layer (11) of polyester fiber based synthetic felt is placed.

The curing conditions are the same as in Example (1), with the exception of the curing time of 3.5 hours.

The results obtained are the same as those of Example 1.

Example 3

The process is carried out in the same way as in Example 2.

The same materials as in Example 1 are used, with the exception of the material of the inner coating layer (3) and the additional reinforcing layer (5).

The inner layer of the sheath (3) is formed by a homogeneous system containing low density polyethylene in an amount of 99.3% by weight relative to the total weight of the inner layer of the sheath (3) and polymethylsiloxane in an amount of 0.7% by weight relative to the total mass of the inner layer (3). The additional reinforcement layer (5) is made of carbon fiber mesh.

The curing conditions are the same as in Example 2, except for the heat carrier temperature of 90 ° C.

The results obtained are the same as in Example 1.

Example 4

The process is carried out in the same way as in Example 1, except for the phase of sealing the side edges (6 and 7) and the synthetic nonwovens made by welding the edges (6 and 7) by contacting the edges.

The same materials were used for the jacket as in Example 1 with the exception of the material for the inner lining (3) and the binder.

The inner layer of the sheath (3) is formed from a homogeneous system and contains super-dense polyethylene in an amount of 99.7% by weight relative to the weight of the entire inner layer (3), and polymethylsiloxane in an amount of 0.3 is used as a structural modifier of the polymer % by weight relative to the weight of the entire inner layer (3).

The epoxy polyester bond is used to impregnate the reinforcement layer (4 and 5).

The curing conditions are the same as in Example 3, with the exception of the vapor pressure of 0.07 Mpa.

The results are the same as in Example 1.

Example 5

The process is performed in the same way as in Example 4.

The same materials as in Example 4 are used for the design of the jacket, with the exception of the inner layer material (3) and the additional reinforcement layer material (5).

The inner layer of the sheath (3) is formed by a homogeneous system containing super-dense polyethylene in an amount of 99.5% by weight relative to the weight of the inner layer (3) and polymethylsiloxane in an amount of 0.5% by weight is used as a structural modifier % relative to the mass of the inner layer (3).

The additional reinforcement layer (5) is made of a polyester fiber net.

The curing conditions are the same as in Example 4, except for the heat carrier temperature of 800 ° C and the steam pressure of 0.1 Mpa.

The results are the same as in Example 1.

Example 6

The process is performed in the same way as in Example 4.

The same materials as in Example 4 are used for the design of the jacket, with the exception of the inner liner material (3). The inner layer of the sheath (3) is formed by a homogeneous system containing super-dense polyethylene in an amount of 99.3% by weight relative to the weight of the inner layer (3), and polymethylsiloxane in an amount of 0.7% by weight is used as a structural modifier % relative to the mass of the inner layer (3).

There is no additional reinforcement layer 5 in this case.

Prior to the use of the heat carrier, air is introduced into the pipe at a pressure of 0.01 Mpa for 20 minutes, and then the heat carrier is used to harden the bond, which is the same as in Example 1. The results are the same as in Example 1.

Example 7

The process is performed in the same way as in Example 4.

The same materials as in Example 1 are used for the design of the jacket, with the exception of the material of the inner coating layer (3) and the material for the main reinforcing layer (4).

The inner layer of the sheath (3) is formed by a homogeneous system containing polypropylene in an amount of 99.7% by weight relative to the weight of the inner layer (3) and polyphenylsiloxane in an amount of 0.7% by weight relative to the weight to the mass of the inner layer (3). The main reinforcement layer (4) is made of a synthetic felt based on polypropylene fibers.

The curing conditions are the same as in Example 3 except that the heat carrier temperature is 110 ° C.

The results are the same as in Example 1.

Example 8

The process is carried out similarly to Example 7, except for the degree of hermetic sealing of the side edges of the semi-wrapped material (6 and 7), which are joined so that the edges overlap (Figures 7 and 11).

The same materials as in Example 7 are used for the design of the jacket, with the exception of the inner layer material (3) and the additional reinforcement layer material (5).

The inner layer of the sheath (3) is formed by a homogeneous system containing polypropylene in an amount of 99.5% by weight relative to the weight of the inner layer (3), and polyphenylsiloxane in an amount of 0.5% by weight relative to the weight is used as a structural modifier. to the mass of the inner layer (3). The additional reinforcement layer (5) is made of a polypropylene based synthetic felt.

The curing conditions are the same as in Example 7 except that the curing lasts for 5 hours.

The results are the same as in Example 7.

Example 9

The process is carried out in a similar manner to Example 7.

The same materials as in Example 7 are used to form the jacket, with the exception of the material of the inner lining layer (3). The inner layer of the sheath (3) is formed by a homogeneous system containing polypropylene in an amount of 99.3% by weight relative to the weight of the inner layer (3), and polyphenylsiloxane in an amount of 0.7% by weight relative to the weight is used as a structural modifier. to the mass of the inner layer (3). The main reinforcement layer 4 is made of a synthetic polypropylene fiber based sheath.

Between the additional reinforcement layer 5 (Figure 8) and the outer layer of the sheath 2, another additional reinforcement layer 11 is made, made of a synthetic polypropylene fiber based sheath, which is also arranged coaxially with respect to the axis of the tube.

The curing conditions are the same as in Example 8, except that the pressure is 0.1 MPa.

The results are the same as in Example 7.

Example 10

The process is carried out in the same way as in Example 9.

The same materials as in Example 9 are used to form the jacket, with the exception of the material of the inner coating layer (3), the outer coating layer 2 and the material for the additional reinforcing layers 5 and 11.

The outer layer of the sheath 2 is formed from a multilayer polyethylenepolyamide film.

The inner layer of the sheath (3) is formed by a homogeneous system containing a copolymer of propylene with vinyl acetate in an amount of

99.7% by weight relative to the weight of the inner layer (3) and polymethylphenylsiloxane in an amount of 0.3% by weight relative to the weight of the inner layer (3) is used as a structural modifier.

The main reinforcement layer (4) is made of a synthetic polypropylene fiber based sheath.

The additional reinforcement layer (5) is made of glass knitting. The additional reinforcement layer (11) is made of carbon fiber mesh. Between the outer layer of the sheath 2 (Figure 9) and the additional reinforcement layer 11, another additional reinforcement layer 12 is made of fiberglass and is arranged parallel to the course of the axis of the tube.

The curing conditions are the same as in Example 8.

The results are the same as in Example 9.

Example 11

The process is carried out in the same way as in Example 10.

The same materials as in Example 10 are used for the design of the jacket, with the exception of the material of the inner coating layer (3), the material for the additional reinforcing layer 5 and the material for the additional reinforcing layer 11.

The inner layer of the sheath (3) is formed by a homogeneous system containing a copolymer of propylene with vinyl acetate in an amount of

99.5% by weight relative to the weight of the inner layer (3) and polymethylphenylsiloxane in an amount of 0.5% by weight relative to the weight of the inner layer (3) is used as a structural modifier.

The additional reinforcement layer (5) is made of combined glass material. The additional reinforcement layer (11) is made of a synthetic felt made from a mixture of polyester and polypropylene fibers.

The results are the same as in Example 10.

Example 12

The process is carried out in the same way as in Example 10.

The same materials as in Example 10 are used for the design of the jacket, with the exception of the material of the inner coating layer (3), the material for the additional reinforcing layer (11) and the material for the additional reinforcing layer (12).

The inner layer of the sheath (3) is formed by a homogeneous system containing a copolymer of propylene with vinyl acetate in an amount of

99.3% by weight relative to the weight of the inner layer (3) and polymethylphenylsiloxane in an amount of 0.7% by weight relative to the weight of the inner layer (3) is used as a structural modifier.

An additional reinforcement layer (11) is made of a web based on polypropylene fibers. The additional reinforcement layer (12) is made of a synthetic felt based on polypropylene fibers. The binder is epoxy.

The curing conditions are the same as in Example 8.

The results are the same as in Example 10.

Example 13

The process is carried out in the same way as in Example 2.

The only difference is that in the area of connection of the side edges (6) (Figure 4) and (7), the sheet material and reinforcement layers of the bilayer semi-finished product are coated and between the strip (8) made of material identical to the material of the inner layer of the wrapper, there is a fluoroplasty border (9) of such width that it permits complete closure of the lacunae and is further narrower than the ribbon (8).

In this case, the strip (8) is welded to the side of the inner layer (3), coaxially with respect to the axis of the partially finished part of the jacket, thereby obtaining a hermetic connection.

The same materials as in Example 2 are used for the design of the jacket, with the exception of the material of the inner layer of the sheath (3) and the material for the additional reinforcing layer (5) and the bonding material.

The inner layer of the sheath (3) is formed by a homogeneous system containing polyvinyl chloride in an amount of 99.7% by weight relative to the weight of the inner layer (3), and polyethylphenylsiloxane in an amount of 0.7% by weight relative to the weight is used as a structural modifier. to the mass of the inner layer (3). The additional reinforcement layer (5) is made of glass knitting. The embroidery is polyester and thickened with aerosil.

Prior to using the heat carrier, a pressure of 0.05 Mpa was applied for 10 minutes. The curing is carried out in the same manner as in Example 2. The results are the same as in Example 2.

Example 14

The process is carried out in the same way as in Example 13.

The same materials as in Example 13 are used for the design of the jacket, with the exception of the inner layer material (3) and the additional reinforcement layer material (5, 11) and the boundary layer (9).

The inner layer of the sheath (3) is formed by a homogeneous system containing polyvinyl chloride in an amount of 99.5% by weight relative to the weight of the inner layer (3), and polyethylphenylsiloxane in an amount of 0.5% by weight relative to the weight is used as a structural modifier. to the mass of the inner layer (3). The additional reinforcement layer (5) is made of carbon fiber mesh.

The additional reinforcement layer (11) is made of combined glass material.

The boundary layer (9) is made of synthetic fibers.

The curing is carried out in the same manner as in Example 13. The results are the same as in Example 13.

Example 15

The process is carried out in the same way as in Example 14.

The same materials as in Example 13 are used for the design of the jacket, with the exception of the material of the inner coating layer (3) and the material for the additional reinforcing layer (11) and the boundary layer (9). The inner layer of the sheath (3) is formed by a homogeneous system containing polyvinyl chloride in an amount of 99.3% by weight relative to the weight of the inner layer (3), and polyethylphenylsiloxane in an amount of 0.7% by weight relative to the weight is used as a structural modifier. to the mass of the inner layer (3).

The additional reinforcement layer (11) is made of glass knitting. The boundary layer (9) is made of fiberglass. Curing is carried out in accordance with Example 13.

The results are the same as in Example 13.

Example 16

The process is carried out in the same way as in Example 10.

The difference is that instead of the tape (9) shown in Figure (3), a profiled tape (10) is used, which has a T-shaped cross section and is made of the same material as the inner layer of the wrapper (3) in Figure 5.

The same materials as in Example 10 are used for the design of the jacket, with the exception of the material of the inner coating layer (3), the material for the main reinforcing layer (4) and for the additional reinforcing layer (12).

The inner layer of the sheath (3) is formed by a homogeneous system containing thermoplastic polyurethane based on simple polyester in an amount of 99.7% by weight relative to the weight of the inner layer (3) and polymethylphenylsiloxane in an amount of 0.7 is used as a structural modifier % by weight relative to the weight of the inner layer (3).

The main reinforcement layer (4) is made of a synthetic felt which is a mixture of polyester and polypropylene fibers. The additional reinforcement layer (12) is made of glass knitting. The curing conditions are the same as in Example 10. The results are the same as in Example 10.

Example 17

The process is carried out in the same way as in Example 16.

The same materials as in Example 16 are used for the design of the jacket, with the exception of the inner layer material (3) and the material for the additional reinforcement layers (11 and 12).

The inner layer of the sheath (3) is formed by a homogeneous system containing thermoplastic polyurethane based on simple polyester in an amount of 99.5% by weight relative to the weight of the inner layer (3) and polymethylphenylsiloxane in an amount of 0.5 is used as a structural modifier % by weight relative to the weight of the inner layer (3).

The additional reinforcement layer (11) is made of fiberglass.

The additional reinforcement layer (12) is made of a polyester fiber net. The curing conditions are the same as in Example 13.

The results are the same as in Example 13.

Example 18

The process is carried out in a similar manner to Example 17.

The same materials as in Example 17 are used for the design of the jacket, with the exception of the inner layer material (3) and the additional reinforcement layer material (12).

The inner layer of the sheath (3) is formed by a homogeneous system containing thermoplastic polyurethane based on simple polyester in an amount of 99.3% by weight relative to the weight of the inner layer (3) and polyphenylsiloxane in an amount of 0.7 is used as a structural modifier % by weight relative to the weight of the inner layer (3).

The additional reinforcement layer (12) is made of combined glass material.

Curing conditions:

- the heat carrier is water;

the temperature melts. body temperature is 95 ° C; curing time is 6 hours.

The results are the same as in Example 17.

Example 19

The process is carried out in the same way as in Example (8), except that the side edges (6 and 7) (Figures 6, 7 and 11) are welded so that the edges overlap.

The same materials as in Example 8 are used for the design of the jacket, with the exception of the material of the inner lining layer (3). The inner layer of the sheath (3) is formed by a homogeneous system containing low density polyethylene in an amount of 5% by weight relative to the weight of the inner layer (3), and polypropylene in an amount of 94.7% by weight, using polyphenylsiloxane as a structural modifier. 0.3% by weight relative to the weight of the inner layer (3).

The curing conditions are the same as in Example 18 except that the temperature of the heat carrier is 80 ° C and the vapor pressure is

0.1 Mpa.

The results are the same as in Example 7.

Example 20

The process is carried out in a similar manner to Example 18.

The same materials as in Example 10 are used for the design of the jacket, with the exception of the material of the inner coating layer (3) and the material for the additional reinforcing layers (5 and 12) and the binder material.

The inner layer of the sheath (3) is formed by a homogeneous system containing low density polyethylene in an amount of 45% by weight relative to the weight of the inner layer (3), and polypropylene in an amount of 44.7% by weight, using polyphenylsiloxane as a structural modifier. 0.5% by weight relative to the weight of the inner layer (3).

The additional reinforcement layers (5 and 12) are made of synthetic felt based on a mixture of polyester and polypropylene fibers. The embroidery is polyester thickened with a mixture of aerosil and magnesium oxide.

The curing conditions are the same as in Example 7.

The results are the same as in Example 18.

Example 21

The process is carried out in a similar manner to Example 20.

The same materials as in Example 20 are used for the design of the jacket, with the exception of the material of the inner coating layer (3) and the material for the additional reinforcing layer (12).

The inner layer of the sheath (3) is formed by a homogeneous system containing low density polyethylene in an amount of 95% by weight, polypropylene in an amount of 4.3% by weight relative to the weight of the inner layer (3), and polyphenylsiloxane is used as a structural modifier. 0.7% by weight relative to the weight of the inner layer (3).

The additional reinforcement layer (12) is made of carbon fiber mesh.

The curing conditions are the same as in Example 5, except that the curing time is 6 hours.

The results are the same as in Example 20.

Example 22

The process is carried out in the same way as in Example 10.

The same materials as in Example 10 are used for the design of the jacket, with the exception of the material of the inner coating layer (3), the material for the main reinforcing layer (4) and the material for the additional reinforcing layer (12).

The inner layer of the sheath (3) is formed by a homogeneous system containing super-high molecular weight polyethylene in an amount of 5% by weight, a copolymer of propylene with vinyl acetate in an amount of

94.7% by weight relative to the weight of the inner layer (3) and polymethylsiloxane in an amount of 0.3% by weight relative to the weight of the inner layer (3) is used as a structural modifier.

The main reinforcement layer (4) is made as in Example 1, and the additional reinforcement layer 5 is made of a synthetic polyester fiber based sheath.

The curing conditions are the same as in Example 9 except that the temperature of the heat body is 110 ° C.

The results are the same as in (22).

Example 23

The process is carried out in the same way as in Example 22.

The same materials as in Example 22 are used to form the jacket, with the exception of the inner lining material (3) and the binder material.

The inner layer of the sheath (3) is formed by a homogeneous system containing super-high molecular weight polyethylene in an amount of 45% by weight, a copolymer of propylene with vinyl acetate in an amount of

44.5% by weight relative to the weight of the inner layer (3) and polymethylsiloxane in an amount of 0.5% by weight relative to the weight of the inner layer (3) is used as a structural modifier.

The bond is based on unsaturated polyester resin, thickened with magnesium oxide.

The curing conditions are the same as in Example 22.

The results are the same as in Example 22.

Example 24

The process is carried out in the same way as in Example 6.

The same materials as in Example 6 are used for the design of the jacket, with the exception of the material of the inner lining layer (3). The inner layer of the sheath (3) is formed by a homogeneous system containing super-high molecular weight polyethylene in an amount of 95% by weight, a copolymer of propylene with vinyl acetate in an amount of 4.3% by weight, relative to the weight of the inner layer (3), as a structural and the modifier uses polymethylsiloxane in an amount of 0.7% by weight relative to the weight of the inner layer (3). The curing conditions are the same as in Example 22. The results are the same as in Example 6.

Example 25

The process is carried out in the same way as in Example 13.

The same materials as in Example 13 are used for the design of the jacket, with the exception of the material of the inner lining layer (3). The inner layer of the sheath (3) is formed by a homogeneous system containing polyvinyl chloride in an amount of 5% by weight, thermoplastic polyurethane based on simple polyester in an amount of 94.7% by weight relative to the weight of the inner layer (3), and as a structural modifier, use polymethylphenylsiloxane in an amount of 0.3% by weight relative to the weight of the inner layer (3).

The curing conditions are the same as in Example 19, except that the heat body temperature is 50 ° C and the curing time is 15 hours. The results are the same as in Example 13.

Example 26

The process is carried out in the same way as in Example 14.

The same materials as in Example 14 are used for the design of the jacket, with the exception of the material of the inner lining layer (3). The inner layer of the sheath (3) is formed by a homogeneous system containing polyvinyl chloride in an amount of 45% by weight, thermoplastic polyurethane in an amount of 44.5% by weight, relative to the weight of the inner layer (3), and polymethylphenylsiloxane in amount is used as a structural modifier 0,5% by weight relative to the weight of the inner layer (3). The curing conditions are the same as in Example 14, except that the pressure is 0.1 MPa and the air application time is 5 minutes. The results are the same as in Example 14.

Example 27

The process is carried out in the same manner as in Example 15.

The same materials as in Example 15 are used for the design of the jacket, with the exception of the inner lining material (3). The inner layer of the sheath (3) is formed by a homogeneous system containing polyvinyl chloride in an amount of 95% by weight, thermoplastic polyurethane in an amount of 4.3% by weight, relative to the weight of the inner layer (3), and polymethylphenylsiloxane in amount is used as a structural modifier 0.7% by weight relative to the weight of the inner layer (3). The curing conditions are the same as in Example 15, except that the pressure is 0.2 MPa and the curing time is 10 hours.

The results are the same as in Example 15.

Example 28

The process is similar to the process of Example 25, except that in the homogeneous system of the inner layer of the sheath (3), polyethylphenylsiloxane is used in the same amount instead of polymethylphenylsiloxane. The curing conditions are the same as in Example 25. The results are the same as in Example 25.

Example 29

The process is similar to the process of Example 26 in that polyethylenephenyloxane is used in the homogeneous system of the inner layer of the sheath (3) to the polymethylphenylsiloxane site. The curing conditions are the same as in Example 26 The results are the same as in Example 26.

Example 30

The process is carried out in a similar manner to Example 26, by using polyethylphenylsiloxane in the same amount in a homogeneous inner layer system (3) instead of polymethylphenylsiloxane.

The curing conditions are the same as in Example 27.

The results are the same as in Example 27.

Particularly accurate terminology was used to describe these embodiments of the invention. However, the invention is not limited to these terms, and therefore any such term covers all equivalent terms that have a similar meaning and are used to perform the same tasks.

Although the present invention has been described in accordance with the preferred drawings, it is clear that certain variations and variations may also be made, which is not a departure from the main idea of the invention, which will be understood by those skilled in the art.

These variations and variations are considered not to go beyond the scope of the invention and the following claims.

Industrial applicability

The invention is useful in the manufacture of various types of tubes, as well as in the repair of tubes already in operation.

Claims (62)

PATENT APPLICATIONS Cladding of the inner surface of a tube consisting of two tubular sheaths (2, 3) coaxially arranged from a material based on thermoplastic polymers from which the outer sheath (2) touches the inner surface of the tube (1), the second, the inner envelope (3) is separated from the envelope (2) by a coaxial main reinforcement layer (4) impregnated with a cured polymeric bond, characterized in that the inner tubular envelope (3) is formed by a multicomponent homogeneous system which comprising at least one polymer selected from the group consisting of tremoplastic polymers having a relative elongation of not less than 200% and a melting point not below 100 ° C and a structural modifier of the selected polymer, thereby forming the inner tubular sheath (3) together with the main the reinforcing layer (4) separated at least in one location by the coaxial axis of the mantle, their separate edges (6, 7) being hermetically connected to each other, said shell (3) forming a monolithic structure with the main reinforcing layer (4). Coating according to claim 1, characterized in that the group of thermoplastic polymers whose relative elongation is not less than 200% and the melting point is not below 100 ° C comprises low density polyethylene, super-high molecular weight polyethylene, polypropylene, copolymer propylene with vinyl acetate, polyvinyl chloride and thermoplastic polyurethane, and the structural modifier of the selected polymer is polyorganosiloxane selected from the group consisting of polymethylsiloxane, polymethylphenylsiloxane, polyphenylsiloxane and polyethylphenylsiloxane. Coating according to claim 2, characterized in that the inner tubular sheath (3) is formed by a multicomponent homogeneous system comprising one polymer or a mixture of two polymers selected from said group of thermoplastic polymers in an amount of 99.3 to 99.7 by weight, based on the total weight of the inner sheath (3) and polyorganosiloxane in an amount of 0.3 to 0.7 weight percent, based on the total weight of the inner sheath (3). Coating according to claim 3, characterized in that the selected thermoplastic polymer is low density polyethylene and the selected polyorganosiloxane is polymethylsiloxane. 5. The coating according to claim 3, characterized in that the selected thermoplastic polymer is super-high molecular weight polyethylene and the selected polyorganosiloxane is polymethylsiloxane. Coating according to claim 3, characterized in that the selected thermoplastic polymer is polypropylene and the selected polyorganosiloxane is polyphenylsiloxane. Coating according to claim 3, characterized in that the selected thermoplastic polymer is a copolymer of propylene with vinyl acetate and the selected polyorganosiloxane is polymethylphenylsiloxane. Coating according to claim 3, characterized in that the selected thermoplastic polymer is polyvinyl chloride and the selected polyorganosiloxane is polyethylphenylsiloxane. Coating according to claim 3, characterized in that the selected thermoplastic polymer is thermoplastic polyurethane and the selected polyorganosiloxane is polymethylphenylsiloxane. 10. Coating according to claim 3, characterized in that the mixture of the two selected thermoplastic polymers contains low density polyethylene in an amount of from 5 to 95% by weight and polypropylene in an amount of from 4.3 to 94.7% by weight, based on the total weight of the inner (3), the selected polyorganosiloxane being polyphenylsiloxane. Coating according to claim 3, characterized in that the mixture of the two selected thermoplastic polymers contains super-high molecular weight polyethylene in an amount of from 5 to 95% by weight and a copolymer of propylene with vinyl acetate in an amount of from 4.3 to 94.7% by weight, the total weight of the inner sheath (3) and the selected polyorganosiloxane is polymethylsiloxane. Coating according to claim 3, characterized in that the mixture of the two selected thermoplastic polymers contains polyvinyl chloride in an amount of from 5 to 95% by weight and thermoplastic polyurethane in an amount of from 4.3 to 94.7% by weight, based on the total weight of the inner sheath ( 3) and the selected polyorganosiloxane is polymethylphenylsiloxane or polyethylphenylsiloxane. Coating according to claim 1 or 2 or 3, characterized in that at least one additional reinforcement layer (5) is provided coaxially between the outer tubular sheath (2) and the main reinforcing layer (4). Coating according to claim 1 or 2 or 3, characterized in that the main reinforcing layer (4) is made of synthetic non-woven fibrous material. Coating according to claim 1 or 2 or 3, characterized in that the separate edges (6, 7) of the inner tubular sheath (3), together with the main reinforcing layer (4), are edge-to-edge, hermetically connected. Coating according to claim 1 or 2 or 3, characterized in that the separate edges (6, 7) of the inner tubular sheath (3), together with the main reinforcing layer (4), are hermetically connected so that they overlap. 17. A method of attaching a sheath to the inner surface of a tube, where tubular sheaths (2, 3) based on thermoplastic polymers are mounted outside the tube (1), one of which is external (2) intended for contact with the inner surface of the tube (1), the other - the inner (3) is separated from the sheath (2) by a main reinforcement layer (4) impregnated with a polymeric binder, which is thermally cured to give a three-layer semi-finished product which is part of a sheath, which is inserted into the tube ( 1) and then pressurized heat carrier into the cavity of the inner sheath (3), resulting in thermal treatment and bond hardening, characterized in that the main reinforcing layer (4) is connected to the inner tubular sheath (3) by joining the surfaces a main reinforcing layer (4) and an inner tubular sheath (3) made from a film sheet obtained from a multicomponent homogeneous system by mixing in the molten state at least one polymer selected from the group of thermoplastic polymers having a relative elongation is not less than 200% and the melting point is not below 100 ° C and a structural modifier of the selected polymer, followed by a hermetic connection of the longitudinal edges (6, 7) of the film sheet with the main reinforcing layer (4), thereby obtaining a two-layer semi-finished sheath comprising the reinforcing layer (4) and an inner tubular envelope ( 3), which are coaxially arranged and connected to one another, and then the two-layer semi-finished product is coaxially positioned relative to the outer tubular envelope (2). 18. The method according to claim 17, characterized in that the group of thermoplastic polymers whose relative elongation is not less than 200% and the melting point is not below 100 ° C comprises low density polyethylene, super-high molecular weight polyethylene, polypropylene, propylene copolymer with vinyl acetate, polyvinyl chloride and thermoplastic polyurethane, and the structural modifier of the selected polymer is polyorganosiloxane selected from the group consisting of polymethylsiloxane, polymethylphenylsiloxane, polyphenylsiloxane and polyethylphenylsiloxane. Method according to claim 18, characterized in that the inner tubular sheath (3) is obtained from a multicomponent homogeneous molten system, one polymer, or a mixture of two polymers selected from said group of thermoplastic polymers in an amount of 99.3 to 99.7% by weight, based on the total weight of the inner sheath (3) and polyorganosiloxane in an amount of 0.3 to 0.7% by weight, based on the total weight of the inner sheath (3). 20. The method of claim 18, wherein the selected thermoplastic polymer is low density polyethylene and the selected polyorganosiloxane is polymethylsiloxane. 21. The method of claim 18, wherein the selected thermoplastic polymer is super-high molecular weight polyethylene and the selected polyorganosiloxane is polymethylsiloxane. 22. The method of claim 18, wherein the selected thermoplastic polymer is polypropylene and the selected polyorganosiloxane is polyphenylsiloxane. 23. The method of claim 18, wherein the selected thermoplastic polymer is a copolymer of propylene with vinyl acetate and the selected polyorganosiloxane is polymethylphenylsiloxane. 24. The method of claim 18, wherein the selected thermoplastic polymer is polyvinyl chloride and the selected polyorganosiloxane is polyethylphenylsiloxane. 25. The method of claim 18, wherein the selected thermoplastic polymer is thermoplastic polyurethane and the selected polyorganosiloxane is polymethylphenylsiloxane. 26. A method according to claim 18, characterized in that the mixture of the two selected thermoplastic polymers contains low density polyethylene in an amount of from 5 to 95% by weight and polypropylene in an amount of from 4.3 to 94.7% by weight, based on the total weight of the inner (3), the selected polyorganosiloxane being polyphenylsiloxane. 27. The method of claim 18, wherein the mixture of the two selected thermoplastic polymers contains super-molecular weight polyethylene in an amount of from 5 to 95 percent by weight and a propylene copolymer with vinyl acetate in an amount of from 4.3 to 94.7 percent by weight, the total weight of the inner sheath (3) and the selected polyorganosiloxane is polymethylsiloxane. A method according to claim 18, characterized in that the mixture of the two selected thermoplastic polymers contains polyvinyl chloride in an amount of from 5 to 95% by weight and thermoplastic polyurethane in an amount of from 4.3 to 94.7% by weight, based on the total weight of the inner sheath ( 3) and the selected polyorganosiloxane is polymethylphenylsiloxane or polyethylphenylsiloxane. Method according to claim 17 or 18 or 19, characterized in that at least one additional reinforcement layer (5) is positioned between the outer tubular envelope (2) and the main reinforcing layer (4). A method according to claim 17 or 18 or 19, characterized in that the main reinforcing layer (4) is made of synthetic non-woven fibrous material. Method according to claim 17 or 18 or 19, characterized in that the separate edges (6, 7) of the film sheet together with the main reinforcement layer (4), from edge to edge, are hermetically connected. A method according to claim 17 or 18 or 19, characterized in that the longitudinal edges (6, 7) of the film sheet together with the main reinforcing layer (4) are sealed so that they overlap. 33. A two-layer semi-finished product of the inner surface of the tube comprising a reinforcing layer (4) connected to an inner tubular envelope (3) based on a thermoplastic polymer film, characterized in that the inner tubular envelope (3) is formed by a multicomponent homogeneous system comprising at least one polymer selected from the group consisting of tremoplastic polymers having a relative elongation of not less than 200% and a melting point not below 100 ° C and a structural modifier of the selected polymer, bringing the inner tubular sheath (3) together with the main reinforcing layer (4) made separately in at least one location the coaxial axes of the semi-finished product, and their separate edges (6, 7) are hermetically connected to each other, forming the reinforcing layer (4) and the inner tubular sheath (3), which are mounted coaxially and are interconnected. 34. Semi-finished product according to claim 33, characterized in that the group of thermoplastic polymers whose relative elongation is not less than 200% and the melting point is not below 100 ° C comprises low-density polyethylene, super-high molecular weight polyethylene, polypropylene, copolymer propylene with vinyl acetate, polyvinyl chloride and thermoplastic polyurethane, and the structural modifier of the selected polymer is polyorganosiloxane selected from the group comprising polymethylsiloxane, polymethylphenylsiloxane, polyphenylsiloxane and polyethylphenylsiloxane. 35. Semi-finished product according to claim 34, characterized in that the inner tubular sheath (3) is formed by a multicomponent homogeneous system comprising one polymer or a mixture of two polymers selected from said group of thermoplastic polymers in an amount of from 99.3 to 99.7 by weight, based on the total weight of the inner sheath (3) and polyorganosiloxane in an amount of 0.3 to 0.7 weight percent, based on the total weight of the inner sheath (3). A semi-finished product according to claim 35, characterized in that the selected thermoplastic polymer is low density polyethylene and the selected polyorganosiloxane is polymethylsiloxane. A semi-finished product according to claim 35, characterized in that the selected thermoplastic polymer is super-high molecular weight polyethylene and the selected polyorganosiloxane is polymethylsiloxane. A semi-finished product according to claim 35, characterized in that the selected thermoplastic polymer is polypropylene and the selected polyorganosiloxane is polyphenylsiloxane. A semi-finished product according to claim 35, characterized in that the selected thermoplastic polymer is a copolymer of propylene with vinyl acetate and the selected polyorganosiloxane is polymethylphenylsiloxane. 40. The semi-finished product of claim 35, wherein the selected thermoplastic polymer is polyvinyl chloride and the selected polyorganosiloxane is polyethylphenylsiloxane. 41. The intermediate product of claim 35, wherein the selected thermoplastic polymer is thermoplastic polyurethane and the selected polyorganosiloxane is polymethylphenylsiloxane. A semi-finished product according to claim 35, characterized in that the mixture of the two selected thermoplastic polymers contains low density polyethylene in an amount of from 5 to 95% by weight and polypropylene in an amount of from 4.3 to 94.7% by weight, based on the total weight of the inner (3), the selected polyorganosiloxane being polyphenylsiloxane. A semi-finished product according to claim 35, characterized in that the mixture of the two selected thermoplastic polymers contains super-high molecular weight polyethylene in an amount of from 5 to 95% by weight and a copolymer of propylene with vinyl acetate in an amount of from 4.3 to 94.7% by weight, the total weight of the inner sheath (3) and the selected polyorganosiloxane is polymethylsiloxane. A semi-finished product according to claim 35, characterized in that the mixture of the two selected thermoplastic polymers contains polyvinyl chloride in an amount of from 5 to 95% by weight and thermoplastic polyurethane in an amount of from 4.3 to 94.7% by weight, based on the total weight of the inner sheath ( 3) and the selected polyorganosiloxane is polymethylphenylsiloxane or polyethylphenylsiloxane. Semi-finished product according to claim 33 or 34 or 35, characterized in that the main reinforcing layer (4) is made of a synthetic non-woven fibrous material. Semi-finished product according to claim 33 or 34 or 35, characterized in that the separate edges (6, 7) of the inner tubular sheath (3) connected to the reinforcing layer (4) are hermetically connected, from edge to edge, coaxially axes of the two-layer semi-finished coat. Semi-finished product according to claim 33 or 34 or 35, characterized in that the separate edges (6, 7) of the inner tubular sheath (3) connected to the reinforcing layer (4) are hermetically connected so that they overlap, coaxially axes of the two-layer semi-finished coat. 48. A method for producing a two-layer semi-finished product of the inner surface of a tube, where the inner tubular sheath (3) of the sheath is based on thermoplastic polymers with a reinforcing layer (4), characterized in that the inner tubular sheath (3) is joined by joining the surfaces of a reinforcing layer (4) and an inner tubular sheath (3) made from a sheet of film obtained from a multicomponent homogeneous system by mixing in the molten state at least one polymer selected from the group of thermoplastic polymers having a relative elongation of not less than 200% and the melting point is not below 100 ° C and the structural modifier of the selected polymer, where the surfaces of the film sheet and the reinforcement layer (4) are connected, followed by the hermetic connection of the longitudinal edges (6, 7) of the film sheet with the main reinforcement layer (4), s thereby obtaining a two-layer semi-finished sheath comprising a reinforcing layer (4) and an inner tubular envelope (3) coaxially and interconnected. 49. The method of claim 48, characterized in that the group of thermoplastic polymers whose relative elongation is not less than 200% and the melting point is not below 100 ° C comprises low density polyethylene, super-high molecular weight polyethylene, polypropylene, propylene copolymer with vinyl acetate, polyvinyl chloride and thermoplastic polyurethane, and the structural modifier of the selected polymer is polyorganosiloxane selected from the group consisting of polymethylsiloxane, polymethylphenylsiloxane, polyphenylsiloxane and polyethylphenylsiloxane. A method according to claim 49, characterized in that the inner tubular sheath (3) is obtained from a multicomponent homogeneous molten system, one polymer, or a mixture of two polymers selected from said group of thermoplastic polymers in an amount of 99.3 to 99.7% by weight, based on the total weight of the inner sheath (3) and polyorganosiloxane in an amount of 0.3 to 0.7% by weight, based on the total weight of the inner sheath (3). 51. The method of claim 50, wherein the selected thermoplastic polymer is low density polyethylene and the selected polyorganosiloxane is polymethylsiloxane. 52. The method of claim 50, wherein the selected thermoplastic polymer is super-high molecular weight polyethylene and the selected polyorganosiloxane is polymethylsiloxane. 53. The method of claim 50, wherein the selected thermoplastic polymer is polypropylene and the selected polyorganosiloxane is polyphenylsiloxane. The method of claim 50, wherein the selected thermoplastic polymer is a copolymer of propylene with vinyl acetate and the selected polyorganosiloxane is polymethylphenylsiloxane. 55. The method of claim 50, wherein the selected thermoplastic polymer is polyvinyl chloride and the selected polyorganosiloxane is polyethylphenylsiloxane. 56. The method of claim 50, wherein the selected thermoplastic polymer is thermoplastic polyurethane and the selected polyorganosiloxane is polymethylphenylsiloxane. 57. A method according to claim 50, characterized in that the mixture of the two selected thermoplastic polymers contains low density polyethylene in an amount of from 5 to 95% by weight and polypropylene in an amount of from 4.3 to 94.7% by weight, based on the total weight of the inner (3), the selected polyorganosiloxane being polyphenylsiloxane. 58. A method according to claim 50, characterized in that the mixture of the two selected thermoplastic polymers contains super-high molecular weight polyethylene in an amount of from 5 to 95 percent by weight and a copolymer of propylene with vinyl acetate in an amount of from 4.3 to 94.7 percent by weight, the total weight of the inner sheath (3) and the selected polyorganosiloxane is polymethylsiloxane. 59. A method according to claim 18, characterized in that the mixture of the two selected thermoplastic polymers contains polyvinyl chloride in an amount of from 5 to 95% by weight and thermoplastic polyurethane in an amount of from 4.3 to 94.7% by weight, based on the total weight of the inner sheath ( 3) and the selected polyorganosiloxane is polymethylphenylsiloxane or polyethylphenylsiloxane. 60. The method of claim 48 or 49 or 50, characterized in that the main reinforcing layer (4) is made of a synthetic non-woven fibrous material. A method according to claim 48 or 49 or 50, characterized in that the longitudinal edges (6, 7) of the film sheet together with the main reinforcing layer (4), from edge to edge, are hermetically connected. 62. A method according to claim 48 or 49 or 50, characterized in that the longitudinal edges (6, 7) of the film sheet together with the main reinforcing layer (4) are sealed so that they overlap.