Composite membrane complex temperature setting need to know!

Composite membrane during dry after drying temperature by temperature resistance of the boiling point of solvent and material, amount of glue, adhesive type decision, must match the composite film production speed, make coating on the film adhesive solvent volatilization completely. If the drying temperature is too low, slow evaporation of the solvent, adhesive and composite film printing layer in the residual solvents is much, composite fastness is poor. If the drying temperature is too high, thin film can be stretched, buckling, composite composite membrane can appear after tunnel phenomenon; Solvent volatilization sharply at the same time, there will be false dry phenomenon,, the phenomenon of the solvent residue to exceed bid. Hung road, oven drying temperature Settings should be from low to high, in the film, first in the bake, adhesive solvent evaporation in the easy, temperature should be lower, so that it is slowly evaporates. With the increase of glue viscosity, solvent evaporation is difficult, should raise the temperature, make the residual solvent fully evaporate and become a sticky film. If the first oven temperature set too high, when the coating film into the solvent had time to volatilize, surface was dry directly will not finish volatile solvent confined in the film, the compound can be collected after volatile clean, excessive residual and peculiar smell is very normal. This requires us to set the gradient drying temperature, at the same time, we must keep the oven clean and tidy. Generally speaking, we in the drying tunnel temperature with the first, two, three, four, three sections respectively before 45 ~ 60 ℃, 60 ~ 70 ℃, 70 ~ 80 ℃, the oven in the back without cooling shaft, the fourth section of the drying temperature should be slightly lower than the third paragraph. Improve composite roller temperature and pressure, help to improve the adhesive secondary liquidity, prompting rapid wet glue the second base material, and into the pores on the surface of the substrate, so that the glue fully wettability substrate, which would improve composite strength. Usually compound of 55 ~ 80 ℃ temperature, composite pressure is 46 kg/cm2.