RU1804518C - Method for imparting shape-retaining ability to tailored articles - Google Patents

Abstract

Usage: in the clothing and local industries, in domestic services in the manufacture of outerwear. SUMMARY OF THE INVENTION: parts are impregnated with a forming medium based on thermoplastic or thermosetting resins in the form of a foam, said medium being applied either before wet-heat treatment or during the latter. The invention allows to reduce the energy and resource consumption of the process, to simplify the process and equipment, to reduce the material consumption and dimensions of the equipment, to improve the workshop atmosphere by eliminating the need for a vapor medium as a heat transfer agent. 1 tab.

Description

FIELD OF THE INVENTION The invention relates to methods for imparting form stability to details of garments, for example, shelves of coats, jackets, cuffs and collars of shirts, pleats, etc. and can be used in the sewing and local industries, domestic application services in the manufacture of outerwear.

The aim of the invention is to reduce the energy and resource consumption of the process, simplify the process and equipment, reduce the material consumption and dimensions of the equipment, improve the shop atmosphere by eliminating the need for a vapor environment.

The goal is achieved in that in the method of shaping the details of garments, including the impregnation of parts with a molding medium based on thermoplastic or thermosetting resins and wet-heat treatment, the impregnation is carried out by applying directly to the details of the forming medium in the form of foam, and the forming medium applied before wet-heat treatment or in the process of carrying out the latter.

Foam destroys or weakens intermolecular bonds in the solution of the forming agent to a minimum; therefore, at nc00

about

4 SL

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With

When it is brought to the surface of clothing parts, the solution of the specified agent penetrates to its finest fibers due to the capillary effect, and is evenly distributed in it. During subsequent heating during the wet-heat treatment, the solution of the forming agent evenly distributed between the thinnest fibers of the fabric serves as a heat transfer medium providing good thermal contact with a highly developed surface of the fabric. The vapors of the solution of the forming agent formed during this heating process are formed by. These cabins / finest fibers of the fabric intensify the heat transfer between the medium and the fibers. The solution of the forming agent that has passed into the steam uniformly moistens and heats the thinnest fibers of the fabric, which, on the one hand, provides the required level of plasticization of the fabric, due to which the deformation of clothing parts requires less effort, and on the other hand, it ensures uniform distribution of the forming agent itself through the smallest fibers of the fabric, which provides the required degree of fixation of the FORM. /. /;:. : -: -.

Thus, the claimed method allows to achieve the same results as the prototype method, but without the use of a vapor medium, due to the use of a different mechanism than the prototype for introducing the forming agent into the tissue (capillary effect providing conditions for a different mechanism mass heat transfer during wet-heat treatment, in which the solution of the forming agent itself serves as the heat transfer agent, and not an additional vapor medium.

The mechanism for introducing technological agents (providing tissue properties such as dyeing, water repellent, antistatic) based on the use of foam is known 5.

However, in the known technical solutions, the use of technological agents in the form of foam creates the conditions for fixing these agents in the tissue, in which they remain in it after further operations (rollers, rolls, drying), which gives the fabric the indicated properties,

In the claimed method, the use of foam also secures the forming agent in the details of the clothes: after wet-heat treatment, but at the same time creates the conditions for such a heat and mass transfer mechanism during this treatment, in which the solution itself serves as the heat and mass transfer agent

a forming agent, which eliminates the need for a vapor medium. It follows from the foregoing that the claimed method has an additional effect in comparison with the known methods as a result of different interactions between the common operation of the known and claimed methods (introducing an agent in the form of a foam into the tissue) and subsequent operations.

The mass-heat transfer mechanism in the proposed technical solution during the wet-heat treatment eliminates the need for steam, which reduces the resource consumption of the process and, consequently, the cost

energy for steam production, which reduces the energy intensity of the process. Eliminating the need for steam production and handling operations simplifies the process and, in addition, makes it unnecessary

steam generators and steam pipelines, which simplifies the equipment and reduces its material consumption and dimensions, eliminates the costs of cleaning boilers and steam pipelines and equipment maintenance, improves the workshop atmosphere.

The decrease in energy consumption to a much greater extent than the decrease in medium consumption is due to the relatively lower moisture content in the forming

foam medium /

The foam is absorbed into the tissue within 0.05 s, which allows the foam to be applied immediately before or during the wet-heat treatment.

A method of imparting shape stability to parts of garments involves impregnating parts by applying a forming medium based on thermoplastic or thermosetting resins in the form of foam with

subsequent wet-heat treatment of the parts soaked in the medium. In this case, the processes of impregnation and wet-heat treatment can be combined.

To carry out the impregnation step on

parts of the parts that need to be form-stabilized are applied with a molding medium in the form of foam, which is obtained using a foam generator of any type from aqueous solutions of various molding compositions based on thermoplastic or thermosetting resins.

One of the main characteristics of the foam is the multiplicity of /, equal to the ratio

the volume of foam to the volume of solution that went into the formation of foam. For the proposed method for imparting shape stability to parts of sewing products, the multiplicity of foam is optimal.

ft 8-35 since at a lower multiplicity, the foam is waterlogged and the time required to absorb 20-70% of moisture is very small (0.05 s), which is practically impossible to regulate. At / 5 35, the contact time increases to achieve the desired wetting of the material, however, foams of this magnification are rather difficult to obtain, and for some formulations impossible.

The foam prepared is applied using a foam gun to parts of parts that need to be shaped, and the amount of foam applied is determined by the need to achieve optimal performance properties of the garment.

The upper limit of the foam flow rate should be as low as possible, which corresponds to the savings in the chemicals introduced and the energy required to evaporate moisture from the material during heat setting. In addition, a large amount of chemicals in the material leads to changes in the properties of the garment parts, which leads to a decrease in product quality.

Studies have shown that foam consumption is optimal within the range of 20-70% or 200-700 g per 1 kg of material, depending on its type. Foam consumption can be determined visually or using a dispenser. Such an amount of foam is absorbed into the material during its contact time, typically about 1 second. In this case, the absorption time depends mainly on the multiplicity of the foam.

After applying foam to the underside of the treated areas, the material is thermally pressed with parameters (temperature of the upper ironing pad, temperature of the lower ironing pad, pressing pressure, pressing duration) selected in accordance with the processed material (rubbing), cotton, rayon, etc.

In this case, the solution of the forming medium evenly distributed between the thinnest fibers of the fabric is heated and serves as a heat transfer medium providing good thermal contact with the highly developed surface of the fabric. Steam generated during the heating process flows around the thinnest fibers of the fabric, intensifying heat transfer between the forming medium and the fibers. The solution of the forming agent that has transferred to steam uniformly moistens and heats the thinnest fibers of the fabric, providing the required level of plasticization and the degree of plasticization obtained as a result of deformation of the form.

With the help of automatic installations it is possible to carry out the application of a forming medium in the process of thermal pressing.

PRI me R 1. Samples of pure wool (article 3657), cotton fabric (article 1467), crepe de chine 0 (article 11022) and. crepe-chiffon (article 11042), to give them shape stability, was processed according to the prototype method, i.e. treated with their composition of saturated steam and precondensate solution of 5 thermoplastic resins of the following composition, g / l:

Carbamol. 40 Polyethylene emulsion 3.3 Ammonium chloride 1.30 To the steam coming from the steam generator to the holes of the cushion, a solution of this composition was introduced. Then pressed at TV.p. 140-160 ° C,, 1 kg / Ohm2, g for 10-30 s, dried and cooled (TV.p, temperature 5 of the upper ironing pad, P is the pressure of pressing, t is the duration of pressing). We studied the stiffness and crush resistance of the sample. The research data are presented in the table.

0 After dry cleaning, the shape of the samples was not preserved.

EXAMPLE 2. Shelves of a female coat made of pure wool drape (art. 3657) were treated with a foamed compound obtained from the following components, May. %: Carbamol CEM12 Polyethylene emulsion 10 Glycasin 9 Ammonium chloride 0.5 0 Sulfonol surfactant 2

Water Ostalnoe Multiplicity of the foamed composition / 8-35, foam consumption 200-1500 g / kg of the mass of the processed fabric. After applying foam 5 to the underside of the workpiece. section of the material was subjected to thermal pressing in the following modes: TVP 160-180, Tn.p. 120 ° C, P 0.2 kg / cm2, t 10s. After dry cleaning, the effect of shape stability disappeared.

PRI me R 3. Shelves of a female coat made of pure wool drape (article 3657) were treated with a foamed composition of Latur polyurethane dispersion. The consumption of foam is in the range of 200-1500 g / kg. The pressing conditions are the same as in example No. 2. The imparted properties after a five-time dry cleaning (GOST 21050-75) remain at the level of 80%.

PRI me R 4. Details of the skirt of a women's dress made of cotton fabric (article 1467), crepe de chine (article 11022) and crepe chiffon (article 11042) were treated with a foam compound, May.%; Glycosin 4 Urea 1 Ammonium chloride 0.1 SURFACE E-30 2 Water Remaining Foam consumption within 200-700 g / kg. Then, the parts were subjected to thermal pressing under the following conditions: 140 ° C, tons 120 ° C. P 0.2 kg / cm2, t 5-20 s.

After dry cleaning, the attached properties are maintained at the level of 20%, and after washing and ironing, at 25-30%.

Example 5, Details of a women's skirt of a dress made of cotton fabric (article 1467), crepe de chine (article 11022) and crepe chiffon (article 11042) were treated with the foamed Latur polyurethane dispersion composition. Foam consumption in the range of 200-700 g / kg. The pressing conditions are the same as in Example 4. The safety properties after dry cleaning are at the level of 60%, and after washing and ironing - at the level of 80%.

Research data are presented in the table.

The table shows that the indicators of form stability - rigidity and crush resistance of clothing parts processed according to the proposed method, are not inferior to those of parts processed by the prototype method, and are within the range of desired or permissible indicators without compromising performance properties and presentation of products.

Moreover, due to the absence of the need to use a steam medium, the total amount of heat spent on technological needs in the process of shaping parts of sewing products is shaped.

the proposed method is 15-20% lower than the prototype method.

Thus, the absence of a vapor medium in the process of shaping parts of sewing products in comparison with the prototype provides: elimination of energy costs for steam production and drying of parts of sewing products; process simplification due to lack of steam production and use; simplified equipment and reduced material consumption due to the lack of steam generators and steam lines; elimination of the costs of cleaning boilers and steam lines; simplified process and equipment maintenance; improvement of the internal workshop atmosphere due to the elimination of steam output with the forming agent contained therein under pressure at the junctions of the steam line.

In addition, the simplicity of determining the required amounts of the forming agent provides a significant reduction in its consumption, which additionally requires the resource consumption of the process. :

For r m u l a. and zob re te n and

A method of imparting form-stability to parts of garments, including impregnating parts with a forming medium based on thermoplastic or thermosetting resins and wet-heat treatment, which is also aimed at reducing the energy and resource consumption of the process, simplifying process and equipment, reducing the material consumption and dimensions of the equipment, improving the shop atmosphere by eliminating the need for a vapor medium, the impregnation is carried out by applying directly to the details of the forming medium in a flash the two- form, with the form-formation forming medium is applied before moist heat treatment or in the process of the latter.

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