There will be adhesive residues and excessive glues on the PTFE adhesive tape after it is baked at high temperature. Small residues can be found by hand feeling or close observation, which can have a great impact on the production. This phenomenon may occur if the high temperature resistance data of the tape does not meet the production requirements. Generally, the required high temperature resistance should be 210-260 ℃. Therefore, it is necessary to confirm whether the high temperature resistance data meets the production requirements before the production.
As for the adhesive residue phenomenon, it is the first and most important thing is to control the quality of the PTFE adhesive tape. A preliminary high-temperature ozone screening test should be carried out before the production, and it should meet the requirements of the company before use.
Because the PTFE adhesive tape belongs to high-tech process, the raw materials in the production process contain chemical components, and the environment used by each customer, coating equipment, technical requirements, production process, personnel operation and many other factors vary greatly, it is inevitable that abnormal phenomena will occur in the production process. If the temperature of the production line is too high and is not within the process requirement, there will be adhesive residues. At this time, you should check whether the temperature sensor is in the normal state; in the coating production process, if the curing is not strictly conducted in accordance with the baking data of the pressure sensitive adhesive, the curing time is not enough or the speed of the coating line is too fast, the glue, base coating glue and base material cannot combine successfully.
In order to allow the glue and the base material to fully combine with each other and completely solidify the glue in the natural state, the semi-finished products generally need to stand still for 2-3 days before rewinding and slitting after the PTFE adhesive tape is coated by the coating roller of the coater. This is mainly for the full combination of the glue and the base material as well as the complete solidification of the glue in the natural state. There will be adhesive residues if the glue is not solidified completely.
If there is the adhesive residue phenomenon in the process of producing PTFE adhesive tapes, the abnormal workpiece should be taken out first and stored separately. In order to avoid this kind of phenomenon again, the inspection of online products should be strengthened. Through a period of time or a certain number of defective product statistics, the percentage of the adhesive residue rate can be analyzed. The batch of PTFE adhesive tape should also be checked according to the actual situation to find out the root of the problem, so as to avoid the similar problem in the production process.