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Composite packaging bag material classification

1. Classification of packaging bag compounding process:At present, composite materials for packaging bags are classified according to processing methods, mainly as follows:①Dry coating organic solvent adhesive compound packaging bag material②Wet coating inorganic adhesive composite packaging bag material③Extrusion film laminated composite packaging bag material④Multilayer co-extrusion composite packaging bag material⑤Hot solvent coating composite packaging bag material⑥Solvent-free composite packaging bag material⑦Physical vapor deposition composite packaging bag material⑧Chemical vapor deposition composite packaging bag material⑨Mixing compound packaging bag material⑩ Combination of composite packaging bag materials, etc.2. Classification according to the composite material of the packaging bagAs we all know, the substrates used for flexible packaging are mainly plastic films, followed by paper, metal aluminum and composite materials. They can be used to manufacture the following types of composite packaging materials:①Paper and paper②Paper and metal foil③Paper and plastic film④Plastic film and plastic film⑤Plastic film and metal foil⑥Plastic film and metal film⑦Plastic film and base material⑧ Plastic film and inorganic compound film⑨Plastic film and organic compound film⑩Amorphous plastic film and plastic film ?Substrate and nano-type ultra-fine particles composite ?Special additives for substrate coating or impregnation ?Multilayer composite of composite materials, etc.3. Classification according to the composite form of packaging bagsGenerally speaking, most of the packaging bag composites are made uniformly on the entire surface. The composite forms of packaging materials mainly include the following categories:①Large area composite② Local compounding, such as compounding strength or imparting certain functions only at the sealing part or strengthening part of the package③Composite sheet or composite bag, which integrates special functions and exerts the overall function④ Gradual compounding, changing the concentration, composition or thickness of the additive material in the thickness direction of the compound film as needed⑤ Special compounding, such as compounding according to mesh graphics, etc.4. Classification according to the composite function of packaging bagsFor the packaging industry, due to the different requirements for product packaging in various industrial sectors, different systems have different classification methods, and there is currently no unified regulation and table conversion terms. According to the recent European and American”new packaging system”can be divided into the following10kind:①Enhanced composite packaging②High permeability type composite packaging bag③Anti-corrosion composite packaging④Anti-electromagnetic field interference composite packaging⑤Antistatic composite packaging⑥Biocomposite packaging⑦Preservation composite packaging⑧ Composite packaging for cooking⑨Intelligent compound packaging⑩Ultramicro and nanocomposite packagingIt is worth noting that the packaging bag composite materials such as plastic composite or plastic and paper composite or plastic, paper and aluminum foil composite are somewhat different from the above-mentioned strength plastic composite materials. The development trend of flexible packaging composite materials is to improve the composite technology and improve the performance and function of composite materials; the second is to select appropriate materials and the best technology to reduce the cost of composite materials; the third is to develop new varieties, such as structural materials that are being developed, Functionalized materials, molecular composite materials, ecological composite materials, etc.

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