The main factors affecting the appearance quality of PET non silicon release film

The main factors affecting the appearance quality of PET release film are as follows:

1. Coating head

At present, the coating heads widely used by silicon coating enterprises in China mainly include scraper/mesh roller/roller coating/multi roller coating. Just slightly improving the appearance and performance. In essence, the improvement should not exceed 20%. However, foreign countries use micro shaped rollers with certain angles for coating, which improves transparency from an optical perspective. Meanwhile, the possibility of rainbow lines has been completely eliminated.

2. Composition of coating agent formula

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

Organic silicon release agents and 120 # solvent oil are not a universal combination, and some organic silicon release agents still require special solvents to be combined with them during use.

3. Drying tunnel

A good baking tunnel is also the key to success. The design of many key points such as the air outlet and angle of the dry tunnel also determines the quality equipment of the production line. Manufacturers are also unaware of the operating environment and process. Otherwise, they won't manufacture equipment, but materials.

4. Temperature curve

A reasonable temperature curve is also the core of solving 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 favorable for curing silicone resin? What temperature is most conducive to the stability of the release layer? These are all crucial. Many domestic equipment manufacturers have equipped coating machines with the most primitive thermal relays. During the production process, temperature fluctuations are significant.

5. Rolling environment

The quality of winding also has a significant impact on the quality. Some equipment manufacturers, due to outdated manufacturing processes, either use high tension to roll up the PET separation membrane (which is not easy to roll off), but the membrane deforms and gets injured. In some cases, the tension during film winding is very low, which makes the film easy to run and be damaged. A reasonable control system is crucial. The most important thing is to be able to finish neatly on the coating machine. Without certain operational experience and high-quality equipment, these are all in vain.

The above is the main factors that affect the appearance quality of PET non silicon release film that we have introduced to you. If you have any further questions, please feel free to consult our website, and we will have professional personnel to explain them to you.