Protective film adhesive transfer is a situation that many people have encountered. Today, the reasons and solutions for the transfer of protective film glue are brought. The so-called glue transfer refers to the phenomenon that the coating is uneven or there is a glue displacement remaining on the surface of the profile during transportation. Solutions for the transfer of protective film glue with different causes:
The production process of the protective film, the base material (PET) and the raw material (pressure-sensitive adhesive) have quality problems that cause defects.
①Improve the process and perfect the scientific process regulations.
The coating production process requirements include the preparation of glue, the amount of glue, the uniformity of the glue, the proportion of the curing agent, the uniformity of the dispersion of the curing agent in the glue, the machine speed, the temperature setting, the drying effect, etc.
②Improve the quality of glue.
Such as the use of pressure-sensitive adhesives with high gel fraction, the use of long carbon chain acrylate monomer copolymerization or connection technology, the addition of certain ultraviolet light absorbers, the optimization of formulations and the production process of glue, etc., can effectively improve the heat resistance of pressure-sensitive adhesives, Low-temperature resistance.
③Improve the surface tension of aluminized PET film.
PET itself is a polar material with a certain tension on both sides, but the tension value will decay with time. If an additional corona treatment machine is used for online activation treatment, the binding force between the PET substrate and the glue can be improved.
④ Improve the cross-linking degree of pressure-sensitive adhesive.
The cohesion can be improved by improving the formulation of the glue and increasing the proportion of crosslinking agent.
Protective film aging
Aging mainly includes heat aging and ultraviolet aging. Solution: The protective film and the profiles that have been covered with the protective film should avoid sunlight exposure as much as possible. After the installation is complete, the protective film should be removed in time.
Glue transfer treatment method: Once the phenomenon of glue transfer is found, first find the profile specifications and batch number to isolate. It is better to process the semi-finished products because the finished products are more difficult to process.
Treatment method: first tear off the protective film (the speed of tearing film needs to be controlled according to the amount of glue remaining), try to avoid the film from breaking; wipe it repeatedly with cotton cloth, and finally wipe the surface of the cleaning agent with clean cotton cloth, try not to use rough hard fibers Fabric, otherwise, it is easy to damage the surface gloss of the profile; re-stick the film after processing. The protective film adhesive transfer includes three situations: cohesive failure, adhesive base destruction, and migration residue.
Post time: 2020-06-17
