Complete Guide to Common Issues, Causes, and Solutions in the Use of PET Release Film Regarding the use of PET release film in die-cutting, the following common issues are often encountered: 1. After the adhesive tape is attached to the release film, part of the tape peels back in reverse during peeling, producing a cracking sound.
2. Anti-stripping: The material that should be stripped is not stripped.
3. After being cut and placed for a period of time, the adhesive tape cannot be peeled off from the release film.
4. The surface of the release film is very oily, and it feels like the release layer is prone to peeling off.
5. The release film generates static electricity during the unwinding and winding process, which attracts dust.
In response to the above-mentioned issues, our editor has compiled the following corresponding solutions: 1. When peeling, if there is noise, it is either due to excessive peeling force or uneven coating.
2. Anti-peeling is mainly caused by an improper combination of release forces. There are two reasons for this. Firstly, the factory inspection of release films is not strict, the inspection equipment is incomplete, and the production process is not stable enough, resulting in significant differences in release forces among products of the same model. This leads die-cutting factories to use release films with the release forces they think they need due to their usage habits. Secondly, the weather resistance of the release layer is insufficient, and it undergoes significant changes over time.
3. After being pasted with adhesive tape, it cannot be peeled off, which is usually due to uneven coating. Some release films with serious coating omissions may result in a certain part lacking release effect, making it impossible to peel off the adhesive tape. This issue should be avoided in die-cutting with round blades.
4. The greasy appearance of the release surface is primarily caused by the system of the release agent. It's not necessarily true that greasy substances are inherently bad. In fact, some greasy release films exhibit relatively uniform surface coating and superior residual adhesion. However, some simply have poor adhesion, with silicone oil easily detaching. These issues can be determined through testing.
5. Regarding electrostatic issues, apart from physical solutions, chemical solutions are usually permanent. Generally, photoelectric-grade die-cutting factories have dust-free workshops and static elimination equipment, so the problem is not significant. For those with stricter requirements, anti-static coated release films can be chosen.
The above is a comprehensive guide to the common problems, causes, and solutions related to the use of PET release film, as introduced by our editor