How does the curing process of TPU film work? What about the processing technology of TPU film? Here we take a look! Due to the characteristics of the raw materials produced by the aluminum sheet, we have to take some measures to make some good characteristics of the TPU film become more prominent. We have done more mature process of the aluminum sheet TPU film. .
Curing is also called curing, which is a process in which a composite film is placed in an oven (maturing chamber) to crosslink the main component and curing agent of the polyurethane binder and interact with the surface of the composite substrate. The main purpose of curing is to make the main agent and the curing agent fully react for a certain period of time to achieve the best combined strength. The second is to remove low boiling residual solvents such as ethyl acetate.
The curing control is mainly the control of the curing temperature and the curing time. The curing temperature and the curing time are determined by the properties of the adhesive used and the final performance requirements of the product. Different binder types have different curing temperatures and times. The curing temperature is too low, below 20 ° C, and the reaction of the binder is extremely slow. The curing temperature is too high, and the substrate film additive precipitates, which affects the performance of the composite film and increases the odor. For example, the aging time is too long, which will affect the performance of the composite film and increase the odor, which is mainly caused by the precipitation of processing aids in the polyethylene film.