Technical Articles

Teflon tape residual glue (overflow) problem analysis and clearing coup

The problem of residual rubber of Teflon tape is a problem often encountered with Teflon tape, and some people call it the problem of overflow glue. The so-called residual glue (overfill) problem is that the Teflon tape will have a small residue after close observation in a high temperature environment, and the hand feels rough. It is undeniable that the small residue of residual glue (excess glue) has a great impact on production. Today we will discuss why there is a problem of residual glue (overfill) and talk about the problem of removing residual glue (overfill). The coup of the residue.

First discuss the reasons, the residual glue (overflow) problem is generally the tape high temperature resistance data does not meet the requirements of the use of the environment, such as the temperature of the production environment for a long time above 300 degrees Celsius, although the highest temperature resistance of Teflon tape up to 400 degrees Celsius, However, its long-term high temperature resistance is 260 degrees Celsius, and the optimum temperature range is 200-260 degrees Celsius. Therefore, before using Teflon tape, it should be confirmed whether the production environment meets the requirements of the Teflon tape for the use environment.

Another reason is the quality of Teflon tape. This problem can also be caused if the temperature of the production line is too high in the process of producing Teflon to exceed the process requirements. For factory manufacturers, check the temperature sensor immediately.

The third reason is that the quality problem of the Teflon tape product itself is not strictly adhered to the pressure sensitive adhesive baking data during the coating production process, and the curing time is not enough or the coating line speed is too fast, resulting in glue, The primer and the substrate cannot be combined.

The fourth reason is that the Teflon tape is not placed for a long time: when the Teflon tape is coated by the coating roller of the coater, the semi-finished product generally needs to be allowed to stand for 2-3 days before being re-rolled and cut. If the placement time is not enough, the adhesive and the substrate cannot be fully combined, and the adhesive cannot be completely cured under natural conditions. Re-filling or slitting of Teflon tape that is not fully cured will result in residual glue (overfill).

Since Teflon tape is a high-tech process, raw materials contain chemical components in the production process, and each customer uses the environment, coating equipment, technical requirements, production processes and personnel operations, etc. Glue (overfill) phenomenon requires different treatment methods.

First and foremost, it is necessary to control the quality of Teflon tape. For the production company, the preliminary high-temperature screening test of ozone should be carried out before it is put into production, and it can be used after meeting the company's requirements. For the user, purchase quality-assured Teflon tape.

For the production plant, there is a phenomenon of residual glue (overfilling) in the production process. The abnormal workpiece should be taken out first and stored separately to avoid such phenomena. At the same time, the online product should be inspected for a period of time or A certain number of bad statistics, the percentage of residual glue rate is analyzed, and the batch of tape should be inspected according to the actual situation to find out the root cause of the problem, so that similar phenomena will not occur in the production process. For workpieces with residual glue, in order to reduce the cost of the investment, these workpieces can be degreased with alcohol or tape by wiping with a cotton cloth dipped in a small amount of alcohol; using the same type of tape for sticking.

For the user, the problem of residual glue (overfill) first confirms whether the ambient temperature meets the requirements. If there is no problem with the temperature, you need to contact the Teflon tape production factory or dealer in time. For the residual glue (overfill) workpiece, the same is done by using alcohol or tape to remove the glue by wiping with a cotton cloth with a small amount of alcohol; using the same type of tape for sticking.

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