RU2040793C1 - Process of determination of wettability of textile materials with polymer adhesive and device for its realization - Google Patents

Abstract

FIELD: tailoring industry. SUBSTANCE: sample of material is laid with a drop of adhesive on microscope stage and edge wettability angle is measured. For this purpose material is heated after application of drop of adhesive as well as adhesive to viscosity temperature of adhesive. Heating is conducted to side of material. For magnetification of dimensions of sample microscope arranged horizontally is used in device and microscope stage is located in thermal chamber which heater is connected to thermal control and is placed under microscope stage. EFFECT: capability for determination of wettability of textile material with polymer adhesive transformed in viscous state with minimal material, power and time expenses. 2 cl, 1 dwg, 1 tbl

Description

 The invention relates to light industry, in particular to methods for determining the wettability of textile materials.

 Known methods for determining the wettability of textile materials with water [1] and acid [2] which include the operation of applying liquid droplets to the surface of a material, keeping the liquid for a certain time, and visually assessing the ability of the materials to be wetted, for example, by passing liquid droplets through itself.

 Known devices for determining the wettability of textile materials with water [1] and acid [2], while the devices contain means for applying drops of liquid and means for placing a test sample of textile material.

Closest to the proposed is a method containing the operation of laying a sample of material on a stage, placing drops of liquid on the material, measuring the contact angle, the diameter of the drop and the zone of contact of the drop with the surface of the material [3]
A device for determining wettability, selected as a prototype, containing a horizontally located microscope, a stage and a projection device [3]
However, known methods and devices have a drawback. They cannot be used to study the interaction of hot melt adhesives with textile material, since they do not reproduce the conditions for the actual production of adhesive joints in clothing items.

 The expected technical result of the proposed method and device is the approximation of the measurement conditions to the actual conditions for the production of adhesive joints in the details of clothing.

 It is achieved by the fact that, including the operation of applying a drop of glue on the surface of the material and measuring the contact angle, according to the invention, after applying a drop of glue, the fabric and the adhesive are heated, and the heating is carried out from the fabric to the viscosity of the adhesive.

 In the device for determining the wettability of materials with polymer adhesive containing a stage, a microscope and a micrometer, according to the invention, the stage is placed in a heat chamber, and underneath is a heater connected to a temperature controller. The location of the heater under the stage provides simultaneous heating of the tissue and glue and leads to an increase in the molecular vibration of their macromolecules, affecting the intensity of interaction. The heat supply from the material side is due to the fact that this corresponds to the actual conditions for the production of adhesive joints on the press, when the adhesive is located between the glued fabrics, and heat is supplied to the adhesive by heating the fabrics.

 The drawing shows a diagram of the device.

 The method is as follows. A drop of polymer glue is placed on the material laid on the stage of the heat chamber, kept at a temperature corresponding to hot pressing, until the glue becomes viscous, the time is measured and the contact angle is determined.

 The device contains a heat chamber 1, inside which there is a stage 2, a heater in the form of an electric spiral 3. A sample of textile material 4 and a drop of polymer glue 5 are placed on the table. Using a micrometer 6, rigidly connected to the heat chamber, set its position relative to the microscope 7 by moving the heat chamber in the guides 8. The measurement of the contact angle is performed by a protractor 9 mounted on the microscope body. The value of the contact angle is shown by arrow 10 connected to a pointer on the microscope objective. The temperature inside the chamber is supported by the temperature controller 11, and the thermometer 12 shows.

 The device operates as follows.

 After a sample of textile material 4 and a drop of polymer glue 5 are placed on the stage 2 of the heat chamber 1, the device is connected to the electric network. The temperature regulator 11 cuts off the supply of electric energy to the spiral 3 when the temperature inside the heat chamber reaches the specified purpose, measured by thermometer 12. Using a micrometer 6, adjust the position of the heat chamber relative to the microscope 7 by moving the heat chamber in the guides 8. Looking into the microscope, set the lens pointer tangent to the drop , while the arrow 10 of the protractor 9 shows the angle between the tangent and the surface of the material, the wetting angle.

 PRI me R 1. Studies were carried out on cotton art. 50 and high pressure polyethylene brand 16214-010.

According to the proposed method were carried out studies in the following order: on the material laid on the stage heat chamber was placed a drop of a polymeric adhesive, samples were kept at ¹⁷⁰ ° C to transfer glue to a plastic condition, the time was measured, the contact angle was measured after 5 min.

EXAMPLE EXAMPLE 2. According to the proposed method were carried out studies in the following order: on the material laid on the stage heat chamber was placed a drop of a polymeric adhesive, the samples were kept at ¹⁷⁰ ° C to transfer glue to a plastic condition, the time was measured, the contact angle was determined in 10 minutes.

EXAMPLE EXAMPLE 3 By the proposed method of investigation was carried out in the following sequence: a material laid on the stage heat chamber was placed a drop of a polymeric adhesive, the samples were kept at ¹⁷⁰ ° C to transfer glue to a plastic condition, the time was measured, the contact angle was determined after 15 minutes

EXAMPLE EXAMPLE 4 By the proposed method of investigation was carried out in the following sequence: a material laid on the stage heat chamber was placed a drop of a polymeric adhesive, the samples were kept at ¹⁷⁰ ° C to transfer glue to a plastic condition, the time was measured, the contact angle was determined in 20 minutes.

 According to the prototype, the studies were carried out in the following sequence: a drop of polymer glue was placed on the material laid on a stage, samples were kept at room temperature, time was measured, the contact angle was determined after 5 minutes, then after 15 minutes. The research results are shown in the table.

 Based on the test results, an optimal test time of 15 minutes was chosen. When the contact time of the drop of glue with the material is less than 15 min, the contact angle decreases, and for a longer time, its change is not observed, i.e. equilibrium occurs.

 Using the proposed method and device will allow, with minimal material, energy and time costs, to determine the ability of a textile material to be wetted by a polymer adhesive converted into a viscous flow state.

Claims (2)

 1. A method for determining the wettability of textile materials with polymer glue, including laying a sample of material on a stage, applying a drop of glue to the material, repeatedly increasing the area of contact of the glue with the material and measuring the contact angle, characterized in that after applying a drop of glue to the material sample heating to the temperature when the glue transitions to a viscous flow state with heat input from the fabric side, and the measurement of the contact angle is carried out after the sample is held at this erature for a certain period of time.  2. A device for determining the wettability of textile materials with polymer glue, containing a stage and means for increasing the size of the sample and measuring the contact angle, characterized in that it has a heat chamber equipped with a temperature regulator connected to a heater, and the object stage is placed in the heat chamber above the heater.

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