RU51833U1 - THERMAL ADHESIVE GASKET MATERIAL - Google Patents

Abstract

Abstract The utility model relates to light industry, namely, to elastic hot-melt adhesive gasket materials on a woven basis, designed to duplicate the details of the cut of garments. The woven basis of the material is made of textured polyester crepe weaves with a linear density of warp and weft of 10–24 tex and with a density of threads in the fabric of 12–24 threads / cm. One of the sides of the base is coated, made in the form of randomly located adhesive points with a diameter not exceeding 1 mm and a distance between the points of not more than 3 mm. The technical result of the utility model is to increase the operational properties of the cushioning material.

Description

The proposed utility model relates to light industry, namely, to elastic hot-melt adhesive cushioning materials on a woven basis and can be used for frontal and local duplication of cut details of garments, such as, for example, men's and women's outerwear.

In the manufacture of clothing, to give the details of the garment the required shape stability and to eliminate the stretching of individual sections of the parts, hot-melt adhesive materials are used.

Hot-melt adhesive material is the basis in the form of a special adhesive fabric, on one side of which a hot-melt adhesive coating of thermoplastic polymer is applied.

Known hot-melt adhesive fabric-based cushioning material having a fiber composition of 67% polyester and 33% viscose with a surface density of 130 g / m2 and a thickness of 0.47 mm / 1 /.

However, this material is characterized by increased rigidity, and after washing, a package of materials, including cushioning material, returns its original properties only after wet-heat treatment.

The closest analogue of the declared cushioning material is cushioning material designed to duplicate details of a coat, outerwear, military uniform, etc., developed on the basis of a fabric with a fibrous composition of 60% polyester, 40% viscose, a surface density of 100 g / m2 , which, as an adhesive coating, is coated with a thermoplastic polymer with a diameter ⌀ of adhesive points up to 0.5 mm and a distance between them of h up to 1.2 mm. / 2 /.

However, this material also has high bending stiffness and insufficient tensile relaxation properties.

The technical result of the proposed utility model is to eliminate the above disadvantages, i.e. in creating a hot-melt adhesive material on a woven basis with enhanced performance properties, namely allowing after duplication with fabrics to maintain the mechanical properties of the upper fabric - the mobility and elasticity of the entire fabric-laying material system, that is, the possibility of stretching along the base and weft with subsequent movable relaxation after termination tensile effort.

This technical result is achieved through the use of a woven base of cushioning material made of polyester textured yarns and the mode of applying hot-melt adhesive. creating an adhesive point with an increased adhesion area to the base.

Using textured yarns has several advantages over conventional yarns:

- high extensibility;

- high proportion of elastic deformation;

- high strength with a smaller thickness and linear density of the threads;

- high resistance to repeated cyclic deformations;

- the lack of access to the surface of individual fibers and, as a consequence, the exclusion of the destruction of the adhesive coating during repeated cyclic deformations.

Hot-melt adhesive material on a woven basis made of textured crepe polyester yarns with a linear density of warp and weft from 10 to 24 tex, and with a density of threads in the warp and weft of 12 to 24 threads / cm.

After the shrinkage process, a hot glue coating is applied to the woven base (one of its sides) in the form of polyamide adhesive dots, which can have a diameter of up to 1 mm and are located at a distance of up to 3 mm from each other.

The surface density of the hot-melt adhesive coating is 13-17 g / m ² .

The implementation of the woven basis of the proposed material from textured crepe weave threads improves the elastic properties of the material, which in turn increases the reverse relaxation of the material. Polyester yarns are characterized by a lower thickness than viscose yarns, which positively affects the reduction in weight of the finished material, and, consequently, the whole garment. The implementation of the proposed material entirely from polyester yarns increases its adhesive properties, and the shrinkage of this material due to the proposed intervals of fabric density is slightly reduced in comparison with analogues, which helps to reduce shrinkage when applying hot-melt adhesive, as well as during manufacturing and wet processing of the finished garment.

The utility model is illustrated by drawings, where Fig. 1a schematically shows the location of adhesive points on a woven base according to the closest analogue, Fig. 1b shows the same according to the proposed utility model, and Fig. 2 shows a photograph of adhesive points applied to the woven base. For clarity, a ruler is placed at the bottom of the photo.

The hot-melt coating is carried out in a special industrial installation as follows. The thermal adhesive used is a copolyamide powder. Powder from the hopper through a special dispenser is evenly distributed over the surface of the moving, made in the form of a cloth (woven base), cushioning material. Moving with the web, the particles of thermal adhesive pass through the heat chamber of the unit, are melted and partially fixed on the web.

Further, the cushioning web passes between the two rolls-calenders, as a result of which the molten particles are compressed and

rolled, taking a flat shape. Then the canvas passes through the cooling calender and wound into a roll.

As a result, glue points 2 with an increased adhesion area of up to 1 mm in diameter (⌀) were obtained on the fabric 1 (woven base), while the adhesive points are arranged in a random manner with a distance R of up to 3 mm between them, which contributes to an increase in the area of coverage with glue and respectively, in further increasing the adhesion strength of the hot-melt adhesive cushioning material and fabric, as illustrated in Fig.1b, 2 and example No. 2 (see below).

The utility model is illustrated by the following examples.

Example No. 1

The fabric is made from polyester textured yarns with a linear density of 12 tex in the warp and 10 tex in the crepe weft with a density of 24 warp / cm warp in the weft of 18 threads / cm.

The hot glue coating is applied to the woven base at a temperature of the heat chamber of the installation of 150 ° C, the surface density of the hot glue coating is 13 g / m2, the residence time of the glue point in the heat chamber of the installation is 20 seconds. The diameter of the obtained adhesive points is 0.7-1 mm, the distance between the points is up to 3 mm.

Example No. 2

The fabric is produced according to example 1, the linear density of the warp threads 24 tex, the weft threads 12 tex. The density of the fabric on the basis of 12 threads / cm, the density of the weft 24 threads / cm.

The hot-glue coating is applied to the developed woven base at a temperature of the heat chamber of the installation of 160 ° C, the surface density of the hot glue coating is 15 g / m2, the residence time of the glue point in the heat chamber of the installation is 18 seconds. The diameter of the obtained adhesive points is 1 mm, the distance between the adhesive points is up to 3 mm.

Example No. 3

The fabric is produced according to example 1, the linear density of the warp threads 24 tex, weft 24 tex. The density of the fabric on the basis of 18 threads / cm, the density of the weft 24 threads / cm.

The hot-glue coating is applied to the worked out base at the temperature of the heat chamber of the installation 165 ° C, the surface density of the hot glue coating is 17 g / m2, the residence time of the glue point in the heat chamber of the installation is 16 seconds. The diameter of the adhesive points obtained is 1 mm, the distance between the adhesive points is up to 3 mm.

Example No. 4 (the closest analogue)

On the cushioning fabric containing 60% polyester yarns and 40% viscose yarns with a surface density of 100 g / m2 and a thickness of 0.4 mm, a hot glue point polyamide coating is applied in the form of individual dots, each of which consists of molten glue particles.

The main unit of the installation is a chrome-plated steel engraving cylinder of cylindrical shape, on the working surface of which is coated individual rows of dots located at the same distance from each other. Each individual point represents a recess in the surface of the shaft in the form of a hemisphere, with geometric parameters corresponding to the required size of the adhesive point.

Polyamide thermal adhesive in the form of paste or powder particles is applied through a special dispenser to the working surface of the rotating shaft, while falling into the perforation of the shaft, the remaining molten powder is removed with a squeegee.

Further, the shaft during further rotation transfers the points of the molten adhesive powder located in the engraving holes to the supplied base of the cushioning material, which results in the transfer of the entire dot pattern to the cushioning base

material. Next, the adhesive coating is dried and wound into a roll of finished fabric.

The quantitative distribution of the adhesive coating points on the cushioning material is determined by the number of the MES number of adhesive points located at a length of 2.5 cm on the side of an equilateral triangle formed by the location lines of the adhesive points. The diameter of the adhesive point is 0.5 mm, the distance between the points is 1 mm or 1.2 mm.

The parameters for applying the adhesive coating in this way are: the surface temperature of the engraving roll is 50-60 ° C, the temperature of the heated rolls is 200-260 ° C, the surface density of the hot glue coating is 20 g / sq.

Comparative properties of hot-melt adhesive gasket materials for examples 1-4 are shown in table 1.

The data presented in table 1 show that the proposed hot-melt adhesive gasket material surpasses the closest analogue in important operational characteristics, including adhesive ability and bending stiffness.

In addition, the proposed material is characterized by the fact that in the finished sewing product there is no passage of a relief pattern of glue dots on the face of the product.

Literature:

1. "The possibilities of using hot-melt materials to ensure the dimensional stability of the main zones of the men's shirt." E.V. Zinkovskaya. T.Yu. Kislitsyna. Magazine “Sewing Industry”, No. 3, 2003.

2. The catalog presented at the Russian fair of goods and services of light industry, held in March 2005 at the All-Russian Exhibition Center.

Table Properties of hot-melt adhesive gasket materials The name of indicators Hot-melt adhesive material Example 1 Example 2 Example 3 The closest analogue (Example 4) 1. The composition of raw materials,% Polyester 100 Polyester 100 Polyester 100 Polyester 60, viscose 40 2. Width, cm 150 150 150 130 3. Surface density, g / sq.m 78 85 90 100 ± 10 4. Thickness, mm 0.25 0.3 0.3 0.4 5. Adhesive ability, kN / m 0.3 0.35 0.35 0.23 6. The resistance of the adhesive to dry cleaning,% not less 85 85 85 85 7. Change in linear dimensions after wet processing,% by lenght -2.0 -2.0 -2.0 -3.0 in width -2.0 -2.0 -2.0 -2.0 8. Bending stiffness μNcm ² by lenght 1000 1100 1300 11800 in width 750 900 1000 560

Claims (5)

1. A hot-melt adhesive material on a woven basis made of textured crepe polyester yarns with a linear density of warp and weft of 10 to 24 tex and a thread density of warp and weft of 12 to 24 threads / cm, with one hot-melt coating is applied from the sides of the base, made in the form of randomly located adhesive points. 2. The material according to claim 1, characterized in that the adhesive points have a diameter not exceeding 1 mm 3. The material according to claim 1, characterized in that the distance between the adhesive points does not exceed 3 mm 4. The material according to any one of claims 1 to 3, characterized in that the surface density of the hot-melt adhesive is 13 ÷ 17 g / m ² . 5. The material according to claim 1, characterized in that the hot-melt adhesive is made of polyamide.