The application of solventless in pharmaceutical packaging film

Solvent-free composite has a unique advantage in solvent residual, pharmaceutical packaging film for product safety requirement is more strict than food packaging, so if we can using solvent-free process on drug packaging film, can better meet the needs of security charge. 1, paper-plastic structure and contain a certain amount of moisture in the paper, consumes a two-component solvent-free composite curing agent may not stem phenomenon of glue. In addition, the paper has a porous, absorbent strong, a two-component solvent free adhesive liquidity is far higher than that of one-component adhesive without solvent, which can cause surface without glue phenomenon, affect drug packaging film composite strength. Therefore, with the method of the inner membrane coating, use wet type of solvent-free one-component than for paper-plastic composite adhesive composite products. 2, the structure of the plastic such as plastic mold structure is relatively simple, solvent-free composite has been able to fully competent, pharmaceutical packaging film with a two-component solvent-free composite adhesive, the flatness of composite product is better. 3, plastic, aluminum plating film such drugs more flexible packaging composite membrane with PET/VMPET/PE, PET/VMCPP is given priority to, and the food flexible packaging composite film BOPP/VMPET/PE ( Or CPP) , BOPP/VMCPP give priority to, the difference between the two lies in the different of material on the surface, and gas barrier property of PET is far higher than that of BOPP film, relatively speaking, so nicely mixed in membrane layer between the small bubble is more difficult in glue permeation through both sides before losing liquidity is good barrier property material, thus white spots. 4, paper, aluminum foil, plastic, also due to the roughness of the paper and absorbent, aluminum composite the paper inappropriate use of one-component solvent-free composite glue, and glue again after adjustment for the pure aluminium and paper laminating way best ( Aluminum foil easy roll wrinkling, particularly high so the adjustment accuracy requirement of equipment) , can decrease the gluing. For reducing the paper coating rubber absorption, can avoid the surface of glue phenomenon. 5, plastic ( The monolayer) , aluminum foil, this kind of medicine packaging film is given priority to with PET/AL/PE, solvent-free composite appearance quality is inferior to dry when the composite products, and pharmaceutical factory for the appearance of the composite film quality requirements and special high, some medicines package factory settle for second best, still use dry composite production outer, solvent-free composite lining.
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