Five common quality problems and solutions for PE protective film
Jan 03, 2022
Compared with previous years, the quality of PE protective film products has been greatly improved, but there are still many details to be improved. We can analyze the quality of the protective film from the following five aspects:
Problem 1: The paste is not firm
In the process of transportation and use, the phenomenon of falling off and weak adhesion to the protected product occurs. The biggest possibility is that the pressure sensitive adhesive used in the production of the protective film product is not sufficiently viscous. Another possibility is that the user is doing it. The pressure of the press molding machine used when placing the mold is not enough, or the surface of the profile is not clean, there is dust or paint, etc., which affects the sticking effect of the sensitive adhesive!
Solution: If this problem occurs, it is necessary to address the cause, prescribe the right medicine, replace the sensitive adhesive to increase the pressure of the film, or pay attention to the effective cleaning of the surface of the profile when applying the film to avoid such problems.
Problem 2: Both ends of the protective film are tilted
The main reason for this phenomenon is that the protective film is stretched to a large extent during the pasting process with the protected profile. After it is pasted, it will retract unnecessarily in a high temperature environment. This problem mostly occurs in On the products of southern customers.
Solution: We should pay attention to the impact of the environmental temperature difference on the use of the product, and avoid unnecessary surface stretching during the pasting process.
Problem three: protective film degumming problem
After the user finishes the installation and construction of the profile, the peeled off protective film will be degummed and left on the profile product. There are many possibilities for this problem. The most likely reason is that the pressure glue used for the protective film product does not meet the regulations, that is, too When the PE protective film is peeled off, the external tension is greater than the internal stress, and it remains on the profile.
Solution: If the user has this kind of problem, you can use a clean cloth dipped in a little alcohol to wipe the remaining sensitive adhesive repeatedly until the sensitive adhesive is wiped clean, but you need to pay attention to when you wipe it. Don't use too much force, or it may affect the finish of the profile product.
Problem 4: There is residual glue after the PE protective film is peeled off
The residual glue of pe protective film has always been a headache for the packaging industry. The residual glue of the protective film has a great relationship with the peeling force of the protective film. To solve the problem of residual glue, we must start from the peeling force of the protective film. The stronger the viscosity, the worse the peel strength may be, the worse the quality of the adhesive, the worse the peel strength.
Solution: The problem of the residual glue of the protective film can be used to add a cross-linking agent. The reactivity of the cross-linking agent must be high enough that it can be cured at a lower curing temperature. However, if the selected substrate is a PE film, because the PE film It has poor temperature resistance, and the curing temperature of the selected curing agent should not be too high. The external adhesive has a good response to the peeling force of the emulsion type protective film.
Before removing the protective film, press it slightly with your hands or a flat object such as a piece of paper, but pay attention to the bearing capacity of the protected item, so that the adhesion between the protective film and the surface of the item will increase, so that the protective film will be removed. At this time, the residual glue can be separated from the surface as much as possible.
Problem five: the protective film is difficult to peel off
When the profile product is installed and peeled off, the protective film cannot be peeled off effectively. There are two possibilities. One is that the sensitive adhesive used in the protective film product is not a special sensitive adhesive for the protective film. If this is the case, the protective film will of course be effective when it is pasted. Very good, but it will be very difficult to peel off. This is also the most common problem with the protective film produced by some illegal protective film product manufacturers. There is also a possibility that the material used in the protective film master tape is too soft. Unable to withstand the tensile force during peeling, and breakage occurs during peeling, which is a very headache for customers.
Solution: Both of these reasons can actually be prevented by choosing regular manufacturers to purchase. For the purchase of protective film, users not only need to understand the relevant purchase skills, but also to shop around in everything, and judge the choice based on the price, service, and the manufacturer's qualifications, strength, and customer evaluation.
