RU2791020C1 - Method of tight connection of parts made of multicomponent materials with a multicomponent coating - Google Patents

Abstract

FIELD: clothing industry.

SUBSTANCE: invention relates to the clothing industry, namely to methods for connecting parts of special-purpose clothing of monocomponent materials with a multicomponent coating. For tight connection of the parts of clothing to protect against the effects of the aquatic environment from monocomponent materials with a thickness of 7.00-15.00 mm with a multicomponent coating, the parts are connected with a thread seam and then glued to the materials being connected with a sealing tape. Shears of one of the connected parts are cut at an angle of 120 ° from the upper and lower points of the shears of the part, forming a protruding sharp angle. The shears of another connected part are cut at an angle of 120° from the upper and lower points of the shears of the part, forming a recess. An adhesive substance with viscosity parameters 2000,00-3000,00 MPa·s and a solidification temperature of 20-25°C is applied to the shears of the parts. The finished parts are connected line-on-line with a thread flat seam on a flat-seam machine. Additional sealing of the seam from the inside is performed by gluing a 13 mm wide thermal adhesive tape using a machine for seamless connection, while the sticking temperature is 165-170 ° C.

EFFECT: retention of the elasticity of the seam with a simultaneous increase in the stability of the connecting seams used in clothing to protect against the effects of the aquatic environment from monocomponent materials with a thickness of 7.00-15.00 mm with a multicomponent coating, to the intense effects of the aquatic environment, low temperatures, mechanical influences.

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Description

The invention relates to the clothing industry, and in particular to methods for joining special-purpose clothing parts of monocomponent materials (consisting of a single component) with a multicomponent coating consisting of several components).

A known method for producing waterproof seams (patent No. RU 9847, IPC D05B 1/26), which is characterized by the continuous supply of a sealant solution to the thread line in parallel with the formation of a thread line. The disadvantage of this method is its applicability only in products made of textile materials, which limits the use of this method in the manufacture of products from monocomponent materials with a multicomponent coating.

A known method for the manufacture of sealed seams of garments (patent No. SU No. 531902, IPC 5 D05B 1/26), including stitching the material with bending its layers inward, in the process of stitch formation, the adhesive liquid is supplied into the interior of the seam, as the seam is blown, the liquid accelerates with penetration into the pores of the seam and holes from the punctures of the material with needles, and then the glued seam is exposed to a jet of hot air. The disadvantage of this method is the increase in rigidity due to the formed thickness of the seam, as well as the complexity of the process.

The threadless adhesive method for forming a seam according to US patent No. 7005021, IPC A41D 27/24, B29C 65/00 is intended for processing garments, connecting the edges of two fabric sheets with different front and back surfaces, due to the arrangement of two strips of adhesive tape, which also has different front and back sides. The formation of the adhesive joint is carried out through the use of ultraviolet welding. The disadvantages of this method are the complexity of the technological process, as well as the insufficient adhesive strength of the film and material (layers with constant stickiness form low molecular weight polymers characterized by low cohesive strength), which limits the resistance of the film-material connection to various kinds of mechanical stress.

A known method for producing waterproof thread connections (patent No. DE 3209054, IPC D05 B 1/26, D05 B 17/00), in which a tape of the same material is inserted between the sheets of material with water-repellent impregnation. The edges of the canvases and ribbons are aligned and stitched. Then, an adhesive mass is fed into the cavity inside the tape and into the joints between the tape and the web. After that, the seam area is hot pressed on both sides with two punches. Under the influence of pressure and temperature, the adhesive mass hardens, providing a strong waterproof seam. A serious disadvantage of the presented methods is the increase in the rigidity of the formed seam when using a special tape from the base material, as well as high labor intensity in manufacturing.

A known method for producing waterproof thread connections (patent No. RU 2211264 C1, IPC D05B 1/26), which consists in supplying a sealing adhesive film to the connection zone of the material layers, grinding them, to increase the tightness of the seams, an aqueous dispersion of acrylic is applied to the surface of the thread line during sewing. copolymers. The disadvantages of this method is the need for additional application of an aqueous dispersion, which gives the seams formed by this method, high rigidity and thickness.

A known method for obtaining sealed seams of garments (patent No. RU 2560057 C2, IPC D05B 1/26), the technical problem of which is solved by a method for obtaining sealed seams of garments, including applying, when grinding layers of material, an aqueous polymer dispersion on the surface of a threaded seam with an allowance on both sides , in which an aqueous polyurethane dispersion based on aromatic polyurethane with a viscosity of 100-300 mPa⋅s at 25°C is used as a dispersion. The disadvantages of this method are the complexity of the technological process and the lack of additional sealing of holes from punctures with a needle when connecting parts with a thread method.

A sealed seam is known (patent No. EU 0327291, IPC 41 D 27/24, B29C 65/50) for connecting elastic waterproof materials, in which the layers of materials fed through the guides are connected by a thread stitch. Sealing tape and/or adhesive are located between the layers of materials. The stitched sections are subjected to subsequent heating and / or compression in order to fill the voids inside the cavity of the seam and partially the holes from the needle puncture with tape and / or glue. The disadvantage of the method is the use of a butt joint without additional processing of sections, which leads to a decrease in the strength of the seam, resistance to various kinds of mechanical stress; lack of additional sealing of holes from punctures with a needle when connecting parts with a thread method; the complexity of the technological process.

There is a method for the formation of waterproof thread connections (patent No. DE 3621743 A1, IPC D05B 1/26), based on the connection of the product parts with a thread seam, as well as the subsequent gluing of a sealing tape onto the materials to be joined. This method involves applying adhesive to its surface from the side of contact with the material before supplying the sealing tape to the joint zone and thermally bonding the sealing tape to the seam area during heating. The disadvantages of the above methods is the need to use auxiliary adhesives, in addition to the sealing tape, which gives the seams formed by this method, high rigidity.

The closest analogue of the claimed technical solution in terms of technical essence is a method of connecting fabrics (patent No. SU 1757595 A1, IPC A41N 43/04), including the formation of a thread connection and its sealing. The edge edges are pre-processed by means of an oblique cut with separation of the cut parts. Further, between the cut surfaces of the parts to be joined, a connecting gasket made of a polymer film is placed. After that, the edges and surfaces to be joined are superimposed on each other and sewn with a thread seam.

The method of forming a seam does not provide sealing of punctures formed as a result of grinding of parts, respectively, does not provide resistance to mechanical damage and low temperatures.

The objective of the present invention is to maintain the elasticity of the seam while increasing the resistance of the connecting seams used in clothing for protection from the effects of the aquatic environment from monocomponent materials with a thickness of 7.00-15.00 mm with a multicomponent coating, to the intense effects of the aquatic environment, low temperatures, mechanical stress .

The problem is solved in the following way. Pre-sections of one of the connected parts of clothing for protection from the effects of the aquatic environment from monocomponent materials with a thickness of 7.00-15.00 mm with a polycomponent coating are cut at an angle of 120 ° from the upper and lower points of the cuts of the part, forming a protruding acute angle; slices of another of the parts to be joined are cut at an angle of 120° from the upper and lower points of the cuts of the part, forming a recess. Then the treated sections are treated with an adhesive (glue) to ensure sealing of the future seam (adhesive parameters: viscosity 2000.00-3000.00 mPa⋅s, pour point: 20-25°C, density: 860-1070 kg/m ³ ) .

In order to ensure the strength of the seam while maintaining its elasticity, the processed parts of clothing for protection against the effects of the aquatic environment from monocomponent materials with a thickness of 7.00-15.00 mm with a multicomponent coating form a butt joint along the cut sections and are connected by a thread flat seam using special equipment. The width of the seam should be wider by 4.00 mm of the cut width, which eliminates the appearance of free edges of the edges and increases the strength of the joint (temperature for gluing 165-170°C).

Brief Description of the Drawings FIG. 1.

Two pieces of clothing for protection against the effects of the aquatic environment from monocomponent materials with a thickness of 7.00-15.00 mm with a multicomponent coating 1 and 2, respectively, with connected sections 3 and 4, having previously processed them: the sections of one of the connected parts are cut out at an angle of 120 ° from the top 5 and bottom 6 cut points of the part, forming a protruding acute angle; slices of the other of the parts to be joined are cut at an angle of 120° from the top 5 and bottom 6 points of the cuts of the part, forming a recess. Then the treated sections 3 and 4 are treated with a special adhesive substance 7 (viscosity parameters 2000.00-3000.00 mPa⋅s, pour point 20°C-25°C). The processed ones form a butt joint along the cut sections 3, 4 and are connected by a thread flat seam 8 on a cover stitch machine. The width of the seam should be wider by 4.00 mm of the cutting width. Then, a hot-melt adhesive tape (width 13.00 mm) 9 is pasted on the inside of the formed flat seam using a seamless joint machine (gluing temperature 165°C-170°C).

Research results.

The value of the strength of the hermetic connecting seam of parts for protection against the effects of the aquatic environment from monocomponent materials with a thickness of 7.00-15.00 mm with a multicomponent coating, characterized by a new version of the butt joint, is substantiated by experimental studies.

The samples intended for testing are strips of monocomponent materials with a thickness of 7.00-15.00 mm with a multicomponent coating, butt-glued together. Sections of samples are processed in two ways: the first (Fig. 1a)) - sections of one of the connected samples are cut at an angle of 120° from the upper and lower points of the cuts of the part, forming a protruding acute angle; slices of another of the specimens to be joined are cut at an angle of 120° from the upper and lower points of the slices of the part, forming a recess; the second (Fig. 2b)) - slices of one of the connected samples are cut at an angle of 45° from the upper and lower points of the slices of the part, forming an acute angle; slices of the other of the specimens to be joined are cut at an angle of 45° from the upper and lower points of the slices of the part, forming an acute angle.

The shape and dimensions of the samples are shown in Fig. 2.

Samples prepared for testing are installed according to the marks in the clamps of the testing machine (RT-250 tensile testing machine) in such a way that the longitudinal axis of the sample coincides with the axis of the load application and the axis of the clamping jaws.

The test was carried out by gradually increasing the load until the specimen failed. Next, the maximum load achieved during the test is recorded.

The indicators for assessing the strength of the sealed connecting seam of clothing parts for protection from the effects of the aquatic environment from monocomponent materials with a thickness of 7.00-15.00 mm with a multicomponent coating are shown in Fig. 3

According to the presented dependence (Fig. 3), it was found that the strength of the hermetic connecting seam of clothing parts from clothing for protection from the effects of the aquatic environment from monocomponent materials with a thickness of 7.00-15.00 mm with a multicomponent coating exceeds the strength of typical connecting seams by 21% .

The set of features of the claimed presented connection method allows the production of overalls for protection against the effects of the aquatic environment, for example, diving suits.

Claims (1)

A method for hermetic connection of clothing parts for protection from the effects of an aqueous medium from monocomponent materials with a thickness of 7.00-15.00 mm with a multicomponent coating, including connecting the parts with a thread seam, followed by gluing a sealing tape onto the materials to be joined, characterized in that the cuts of one of the parts to be joined are cut at an angle of 120° from the upper and lower points of the cuts of the part, forming a protruding acute angle, the cuts of another connected part are cut at an angle of 120° from the upper and lower points of the cuts of the part, forming a recess, an adhesive substance with a viscosity of 2000.00 is applied to the cuts of the parts -3000.00 mPa⋅s and a pour point of 20-25°C, wherein the treated parts are joined end-to-end with a thread flat seam on a flat seam machine, and additional sealing of the seam from the inside is performed by gluing a hot-melt adhesive tape 13 mm wide using a seamless joint machine, the bonding temperature is 165-170°C.

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