Analysis of common problems with PET release film

PET (Polyethylene Terephhalate) is a material widely used in packaging, electronics, and optics fields. Among them, PET release film is highly favored due to its excellent performance. However, during use, users may encounter some common problems. This article will analyze these issues and provide possible solutions. Unstable or unexpected peeling force; Cause analysis: 1 Improper coating process: such as uneven coating thickness, incomplete curing, etc. 2. Fluctuations in raw material quality: For example, changes in the quality of silicone oil may lead to a decrease in the stability of the coating. 3. Changes in production environment: Fluctuations in temperature and humidity can affect the curing degree and performance of coatings&# 8211; Solution: 1 Optimize the coating process parameters to ensure uniform and complete curing of the coating. 2. Strictly screen and control raw materials to maintain stable product quality. 3. Operate in a constant production environment to avoid the impact of sudden changes in temperature and humidity on the product. Serious static electricity phenomenon; Cause analysis: 1 Dry air causes an increase in surface resistance. 2. Poor grounding of processing equipment causes accumulation of static electricity. 3. The special structure of PET materials is prone to generating static electricity&# 8211; Solution: 1 Add humidification devices in the production workshop to reduce the relative humidity in the air. 2. Check and improve the grounding condition of the equipment to ensure a good conductive path. 3. Use anti-static agents to treat materials or install static eliminators on the production line. Decreased or uneven transparency; Cause analysis: 1 Excessive solvent residue during coating affects the transmittance. 2. After coating, it is not fully cured and the coating is not completely stable. 3. Poor storage conditions, such as prolonged exposure to strong light&# 8211; Solution: 1 Choose a low volatility solvent and undergo a thorough drying process after coating. 2. Set an appropriate curing time based on the characteristics of the product to ensure complete stability of the coating. 3. Store the product in a dark and cool environment, avoiding long-term direct contact with light sources. Decreased adhesion; Cause analysis: 1 The viscosity during coating is too low, resulting in weak adhesion between the coating and the substrate. 2. The coating formula is unreasonable, which affects its interaction with the substrate. 3. Aging or moisture can cause the coating to lose its original bonding ability&# 8211; Solution: 1 Adjust the viscosity during the coating process to ensure that the coating has sufficient adhesion strength. 2. Optimize the coating formula to improve its compatibility and adhesion with the substrate. 3. Store products under appropriate conditions, avoid humid environments, and add moisture-proof agents if necessary. Poor dimensional stability; Cause analysis: 1 The different coefficients of thermal expansion result in significant changes in size at different temperatures. 2. The internal stress of the material is not effectively released, resulting in deformation. 3. Dimensional changes caused by residual stresses generated during the machining process&# 8211; Solution: 1 When designing, consider the thermal expansion characteristics of the material and arrange the laminated structure and gaps reasonably. 2. Release internal stress through preheating, annealing, and other methods to enhance dimensional stability. 3. Improve the processing flow, reduce the generation of residual stress, and ensure product consistency. Scratches or granular substances appear on the surface; Cause analysis: 1 Poor quality or severely worn cutting tools or rollers were used during the production process. 2. Poor cleaning, dust or other foreign objects in the production environment. During transportation or storage, it is subjected to external pressure or friction&# 8211; Solution: 1 Regularly maintain and replace production tools to ensure they are in good condition. 2. Strengthen the clean management of the production environment to prevent dust pollution. 3. Standardize product packaging and transportation methods to reduce surface damage caused by external factors. Correctly understanding and addressing these common PET release film issues is a key step in ensuring product quality. Through the above analysis and provided solutions, users can better manage and optimize their application processes, thereby achieving better usage results.