Model selection thermo-adhesive film is a very importan […]
Model selection thermo-adhesive film is a very important link. Only the type of hot melt adhesive film used is compatible with the material in order to proceed with the next composite process. The correct selection does not mean that the compounding of the material must be smooth, because there is a very important factor in the whole process of compounding that will directly affect the bonding effect-temperature!Temperature has a great influence on the use of hot melt adhesive film.
If the temperature is not suitable, it is likely to cause "deterioration" of the hot melt adhesive film. Simply put, if the bonding temperature of the hot melt adhesive film is too high, it is likely to cause the hot melt adhesive film to be "burnt" the temperature far exceeds the high temperature resistance upper limit of the corresponding cornea itself). The bonding temperature is a very important element in the use of hot melt adhesive film, because the hot melt adhesive film can only melt and produce viscosity under certain temperature conditions.
If the sizing temperature is too low, the hot melt adhesive film will not be fully melted, which will cause poor fluidity and the glue will not penetrate well; when the sizing temperature is too high, the hot melt adhesive film will melt too much. Sufficient, if the hot pressing time is not adjusted, it may cause excessive glue penetration, resulting in lack of glue in the glue layer.
If in use, the sizing temperature is much higher than the high temperature resistance limit of the film itself for a long time, it is likely to cause a certain degree of sintering, and the hot melt film will produce a certain degree of carbonization.The operation time of hot melt adhesive film bonding is adjusted according to the temperature. In the case of high temperature, the time should be shorter and when the temperature is low, the time should be correspondingly extended.