Experimental Film Applicator is a device widely used in the research and development of material surface coatings. It is able to precisely control Coating thickness, uniformity and Spreader speed, so as to meet the needs of different materials and coatings. In modern industry, PET (polyethylene terephthalate) film is widely used in Encasement, Electronics, Optical inspection and other fields because of its excellent Mechanical Properties, Transparency and chemical resistance. Epoxy resin as a coating material with excellent performance, has high strength, chemical corrosion resistance and good insulation performance. Therefore, studying the process of coating epoxy resin on PET film by Experimental Film Applicator is of great significance to improve the performance of PET film.
experimental equipment
Experimental Film Applicator: Device for controlling Spreader Thickness and Speed with High Accuracy and Stability.
Oven: for drying and curing of coatings, adjustable temperature.
Thickness gauge: Coating thickness measurement to ensure coating uniformity and accuracy.
Electron Microscope (EM): used to observe the surface morphology and structure of coatings.
material
PET film: thickness of 50 microns, good transparency, clean surface.
Epoxy resin: Choose epoxy resin with good adhesion and Mechanical Properties, and use it with appropriate curing agent.
Solvent: Used to dilute epoxy resin to make it easy to Spreader, usually acetone or ethanol.
1. PET film pretreatment
Before coating the epoxy resin, the PET film is pretreated to improve coating adhesion. The pretreatment steps are as follows:
Cleaning: Use ethanol or acetone to clean the surface of the PET film to remove oil and impurities.
Surface activation: Plasma treatment or ultraviolet light treatment is used to activate the PET surface, enhance its surface energy and improve the adhesion of epoxy resin.
2. Preparation of epoxy resin
According to the ratio of epoxy resin and curing agent, accurately weigh and mix, and fully stir evenly. If the viscosity of epoxy resin is high, an appropriate amount of solvent diluted can be added to facilitate Spreader operation.
3. Spreader process
Spreader of epoxy resin using Experimental Film Applicator, the specific operations are as follows:
Spreader parameter setting: Set the Spreader speed, Coating thickness and coating method (such as roller coating, scraping, etc.) of the Film Applicator as needed.
Spreader operation: The prepared epoxy resin solution is uniformly coated on the surface of the PET film to ensure the uniformity and thickness conformity of the coating.
Drying and curing: put the coated PET film into the oven, according to the curing conditions of epoxy resin for drying and curing, generally need to be cured at 60-80 ℃ for 2-4 hours.
1. Coating thickness measurement
The thickness measurement of the coated PET film is carried out using a thickness gauge to ensure that the Coating thickness is within a predetermined range and to check the uniformity of the thickness.
2. coating adhesion test
The adhesion of the coating was tested by tensile test or disbonding test to evaluate the bonding strength between epoxy resin and PET film.
3. Observation of coating surface topography
Electron Microscope (EM) was used to observe the surface morphology of the coating, and the uniformity and surface defects of the coating were analyzed.
4. Mechanical Property Testing
Mechanical Properties of epoxy resin coated PET film were tested by tensile and bending to evaluate the effect of coating on Mechanical Properties.
5. Chemical resistance performance test
The epoxy resin coated PET film was exposed to acid, alkali, solvent and other chemical Reagents to test its chemical corrosion resistance performance.
Coating thickness and uniformity
Through the precise control of the experimental Film Applicator, epoxy resin coatings with uniform thickness and smooth surface can be obtained. The experimental results show that the coating thickness can be precisely controlled in the range of 2-10 microns, and the thickness uniformity is good. The coating surface was observed under the Electron Microscope (EM), and no obvious defects such as bubbles and pinholing were found.
coating adhesion
The adhesion of epoxy resin coatings was significantly improved after surface pretreatment of PET films. Tensile tests showed that the Peel Strength between the coating and the PET film reached more than 10 N/cm, showing good bonding strength.
Mechanical Property
The epoxy resin coated PET film exhibited excellent Mechanical Properties in tensile and bending tests. The coating not only did not negatively affect the flexibility of the PET film, but also improved its tensile strength and Impact performance to a certain extent.
Chemical resistance performance
Reagents coated with epoxy resin showed good corrosion performance in acid, alkali and solvent. Reagent exposure test for a long time showed no obvious corrosion signs on the coating surface, indicating that epoxy resin coating can effectively protect PET film from chemical corrosion.
Experimental Film Applicator has achieved remarkable results in coating epoxy resin on PET films. Through precise control of Spreader process parameters, epoxy resin coatings with uniform thickness and smooth surface were obtained. The coating exhibited excellent adhesion, Mechanical Properties and chemical corrosion resistance. This process can be widely used in surface modification of PET films to improve its application performance in Encasement, Electronics, Optical inspection and other fields.
简体中文
Korean