On the basis of the development of the packaging industry, the packaging of goods has
also been developed accordingly. From simple paper packaging, to a single layer of plastic film packaging, developed to the wide use of composite materials. Composite film can make the packaging contents have the characteristics of moisturizing, fragrance, beauty, preservation, light, avoidance, penetration, prolong the shelf life and other characteristics, so we get rapid development.
Composite materials are two or more materials, through one or more composite processes and combined together, so as to constitute a certain function of the composite materials. It can be generally divided into base layer, functional layer and thermal sealing layer. The base level mainly plays a beautiful, printing, moisture resistance and other role. Such as BOPP, BOPET, BOPA, MT, KOP, KPET,etc., the functional layer mainly blocks and avoids light functions, such as VMPET, AL, EVOH, PVDC; the thermal sealing layer has direct contact with packaging items, adaptability, permeability resistance, good thermal sealing, such as LDPE, LLDPE, MLLDPE, CPP, VMCPP, EVA, EAA, E-MAA, EMA, EBA, etc
Post time: Dec-01-2022