After a series of improvements in the composite method of the plastic packaging bag, the currently common composite method is the solventless composite method. Solvent-free composites can be widely used because they do not produce any toxic or hazardous substances in the production process, and save resources, low production costs, good environmental performance, and safety and hygiene. It is a typical "green packaging process." It is currently widely used in the production of coffee bags, tea bags, dog food bags, cat food bags, and vacuum bags, aluminum foil bags.
Solvent-free composite is a new composite method that has been improved after dry composite evolution. The solvent-free composite method has been greatly developed since 2010, and hundreds of thousands of solvent-free production lines are added every year.
In the production of flexible packaging, there are actually more production processes. Currently, the more common ones are:
1, co-extrusion compounding process: suitable for heat-shrinkable plastics, such as (EVA, EEA, ionic polymer, PET, PEN, PETC) can be used in the application and development of high-barrier antibacterial packaging film. Such as the application of betel nut packaging bags.
2, extrusion compound: suitable for a variety of plastic film, such as BOPP, BOPET, BOPA, etc., can also be applied to paper, aluminum foil and other sheet applications.
3, surface coating: solution coating, emulsion coating, vacuum evaporation, plasma evaporation, and other methods.
4, dry composite: can be applied to the composite of any film-like substrate, is one of the most widely used processes in plastic flexible packaging in China.
5, wet composite: at least one of the substrates used is a porous material to ensure the evaporation of the solvent after the substrate is bonded, the scope of application is small, the application amount is not much.
6, solvent-free compound: low cost, environmental protection, health, suitable for coffee bags, tea bags, dog food bags, cat food bags, cat litter bags, vacuum bags, aluminum foil bags and other flexible packaging applications.
Post time: Aug-09-2017