Experimental Application Technology of Resin Film Prepared by Spreader

Resin films have a wide range of applications in industry and scientific research, especially in the fields of electronics, automobiles and packaging. Preparation of resin adhesive film by coating test is an important experimental method to accurately control the thickness, uniformity and other physicochemical properties of the adhesive film. The purpose of this article is to introduce the experimental technology, operation steps, influencing factors and applications of the coating test mechanism for the preparation of resin adhesive film.

First, the basic concept of resin film

Resin film is a kind of film made of polymer resin material, which has excellent mechanical properties, chemical stability and electrical insulation properties. There are various methods for the preparation of resin adhesive films, and the coating method is one of the commonly used methods. The basic principle of the coating method is to evenly coat the surface of the substrate with a liquid resin and cure it to form a thin film.

2. The principle and composition of the coating testing machine

A coating Tester is a device used to prepare thin films on the surface of a substrate. Its basic components include a coating unit, a coating substrate, a heating system, and a control system. thereintoThe coating unit is the heart of the coating testing machine and typically includes the coating head, squeegee blade and coating roller. The applicator head is used to store the liquid resin, and the squeegee blade and coating roller are used to evenly coat the resin onto the substrate. Other than thatThe coated substrate is the carrier for the formation of a resin film, usually in glass, metal, or polymer film. The choice of substrate directly affects the adhesion and uniformity of the adhesive film.

A heating system is used to control the temperature during the coating process to ensure that the resin can cure at the right temperature. Commonly used heating methods include bottom plate heating and infrared heating. At lastThe control system is used to adjust the parameters of the coating testing machine, such as coating speed, temperature and scraper pressure. Modern coating testing machines are often equipped with a computerized control system that enables high-precision control and data logging.

3. Experimental materials and equipment

Experimental Materials:

Resin materials: Commonly used resin materials include epoxy resin, polyurethane resin and acrylic resin.

Solvents: Organic solvents used to dissolve resins, such as acetone, toluene, and ethanol.

Coated substrates: such as glass sheets, aluminum foil, polyester film, etc.

Experimental equipment: 

Coating testing machine: used to coat the resin solution and control the coating thickness.

Thickness gauge: used to measure the thickness of the resin film.

Microscope: used to observe the surface topography of adhesive film.

Fourth, the experimental procedure

1. The resin material is dissolved in a solvent to prepare a resin solution of a certain concentration. The formulation process should ensure that the resin is fully dissolved and properly filtered to remove impurities.
   

2. The coated substrate is subjected to pre-treatments, such as cleaning and surface treatment, to improve the adhesion of the adhesive film. Commonly used surface treatment methods include plasma cleaning and chemical etching.
   

3. The resin solution is injected into the coating head of the coating testing machine, and the resin solution is evenly applied to the surface of the substrate by controlling the coating roller and scraper. Adjust the coating speed, squeegee pressure, and coating temperature to control the thickness and uniformity of the film.
   

4. The coated substrate is placed in a heating device and the resin film is cured by heating. The curing temperature and time should be adjusted according to the characteristics of the resin material to ensure that the adhesive film is fully cured.
   

5. Cured resin films may require post-treatments, such as annealing and surface finishing, to improve their performance. The annealing process can eliminate internal stress and improve the mechanical properties of the adhesive film.
   

5. Analysis of influencing factors

firstThe concentration of the resin solution directly affects the thickness and uniformity of the coating film. If the concentration is too high, the thickness of the coated film is prone to unevenness; If the concentration is too low, the coated film may not be able to form a continuous film.

secondThe speed of application affects the distribution of the resin solution on the substrate. If the speed is too fast, the resin solution may not be evenly coated; If the speed is too slow, the thickness of the coating film may not be uniform.

Thirdly, the magnitude of the squeegee pressure affects the thickness and uniformity of the coating film. The pressure is too high, and the coating film may be too thin; If the pressure is too low, the coating film may be too thick and uneven.

Fourth, the curing temperature and time directly affect the performance of the resin film. If the temperature is too high or too long, it may cause the resin to decompose or degrade its properties; If the temperature is too low or the time is too short, the film may not be fully cured.

6. Experimental results and discussion

Through the above experimental procedures, a resin film with a certain thickness and uniformity can be prepared. The experimental results should include the thickness measurement data of the adhesive film, the observation results of surface morphology, and the test results of the physical and chemical properties of the adhesive film. 

1) Thickness measurement

Use a Thickness Gauge to measure the thickness of the coated film and calculate the uniformity of the thickness. The uniformity of the thickness can be characterized by calculating the standard deviation or coefficient of variation.

2) Surface topography observation

Use a microscope to observe the surface topography of the adhesive film and evaluate its uniformity and smoothness. The uniformity of the surface topography directly affects the performance of the adhesive film.

3) Physical and chemical performance test

The prepared resin film was tested for physical and chemical properties, such as tensile strength, elongation at break, chemical resistance and electrical insulation properties. Through these tests, the practical application performance of the adhesive film can be evaluated.

7. Application examples

Coating Tester prepared resin adhesive films have a wide range of applications in electronics, automobiles, and packaging. Here are some specific application examples: 

Electronics——In the packaging of electronic components, resin adhesive film has excellent insulation properties and mechanical strength, which can protect electronic components from the external environment.

Automotive——In automotive manufacturing, resin adhesive films can be used for anti-corrosion coatings on car bodies, providing excellent chemical resistance and mechanical properties.

Packaging——In food and pharmaceutical packaging, resin adhesive film can be used as a protective layer, providing good barrier properties and mechanical strength, extending the shelf life of the product.

8. Conclusion

Coating test machine preparation of resin film is an efficient and accurate experimental method. By controlling the parameters of the coating process, it is possible to prepare resin adhesive films with good performance. In practical applications, the appropriate resin material and coating process should be selected according to the specific needs to achieve good application results.