The main aspects of PET release film quality are as follows:

1. Coating head

At present, the cloth coating head widely used by silicon coating enterprises in China is mainly scrapers/Anilox/roller coating/multi roller roller coating. It's just a slight improvement in appearance and performance. Essentially, the improvement should not exceed 20%. However, in foreign countries, micro engraving rollers with a certain angle are used for coating, which has improved transparency from an optical perspective. At the same time, it completely eliminates the possibility of rainbow patterns appearing.

2. Composition of coating agent formula

At present, silicon coating enterprises in China widely use products commonly known as 120 # solvent oil. However, from the perspective of coating PET release films, better solvents should be toluene, xylene, and even some special solvents. Toluene and xylene can cause a certain degree of physical harm to the operators of the production line, and protective measures need to be taken.

Organic silicon release agents and 120 # solvent oil are not universally compatible, and some organic silicon release agents still require special solvents to cooperate with them during use. As for deeper details, OCA optical adhesive coating dedicated release film wholesalers believe that no coating factory will share them with their peers.

3. Drying channel

A good drying path is also a key core technology for success. The design of many key points such as the air outlet and angle of the drying duct also determines the quality of this production line. It is common to buy a coating production line in Changzhou that requires several months of debugging. Equipment manufacturers also do not understand the usage environment and process, otherwise they will not make equipment and switch to making materials.

4. Temperature curve

A reasonable temperature curve is also the core point to solve the appearance problem of PET release film. What is the temperature when entering the oven? What temperature is most conducive to solvent evaporation? What temperature is most conducive to the curing of silicone? What temperature is most favorable for the stability of the release layer? These are all crucial. Many domestic equipment manufacturers equip coating machines with the most primitive thermal relays. During the production process, there are significant temperature fluctuations. How can a stable product be delivered to customers?

5. Winding environment

       The quality of the winding also has a significant impact on the quality. Some equipment manufacturers are winding up due to outdated manufacturing processes of PET release film. During the process, either a large amount of tension is used to wind up, but the film deforms and gets injured. Some use very low tension to roll the film, which makes it easy for the film to roll and also causes injuries. A reasonable control system is crucial. Being able to roll neatly on the coating machine is the top priority. Without certain operating experience and high-quality equipment, these are all in vain.