Regarding the use of release film in die-cutting, the following common problems are often encountered:
1. After the adhesive tape is attached to the release film, some of the adhesive tape peels back and makes a popping sound when peeling off.
2. Anti stripping, the stripped material has not been stripped.
3. After punching and placing for a period of time, the tape and release film cannot be peeled off.
4. The surface of the release film is very oily, and it feels like the release layer is easily detached.
5. During the unwinding and winding process, the release film generates static electricity and adsorbs dust.
In response to the above issues, the editor has compiled the following corresponding solutions:
1. There is a noise during peeling, which is caused by excessive release force and uneven coating.
2. Anti stripping is mainly caused by an unsatisfactory combination of release forces, due to two reasons. 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 excessive differences in release forces between products of the same model. As a result, the die-cutting factory used the release film they thought was the release force due to usage habits. Secondly, the weathering resistance of the release layer is insufficient and has undergone significant changes over time.
3. After being attached to the tape, it cannot be peeled off, which is usually caused by uneven application. Some release films that are severely missed can cause a certain part to have no release effect, resulting in the tape being unable to be peeled off. This problem should be avoided in circular knife die-cutting.
4. The oily release surface is mainly caused by the isolation agent system, and it is not necessarily bad for oily things. In fact, some oily release films are evenly coated on the surface and have better residual adhesion. But some are purely poor in sealing, and silicone oil is prone to detachment. These can all be determined through detection.
5. Static electricity problems are generally permanent in terms of chemical treatment, in addition to physical treatment methods. Generally, photoelectric grade die-cutting factories have dust-free workshops and equipment for removing static electricity, so the problem is not significant. For those with strict requirements, anti-static coated release films can be chosen.