Soft packing is a kind of packaging that can change the […]
Soft packing is a kind of packaging that can change the shape of the container after filling or taking out the inside. All kinds of bags, boxes, sleeves and envelopes made of paper, aluminum foil, fiber, plastic film and their compound are all soft packing.
Classification of soft packaging composite materials:
One, classified according to the compound process. At present, the composite materials used for soft packing are classified according to the processing methods. The main types are as follows:
1, dry coating organic solvent adhesive composite soft package materials; 2, wet coating inorganic adhesive composite soft package materials; 3, extrusion film laminated composite material; 4, (by more than two multi-layer co extrusion head) composite soft package materials; 5, heat flux coated composite soft package materials; 6, no solvent (solid adhesive) composite soft package material; composite soft package materials, 7 physical vapor deposition; composite soft package materials, 8 physical vapor deposition; 9, mixing type composite soft package materials; 10, the method of composite soft package materials etc..
Two. Classified according to the compound material. As the Keeling soft packaging complex is mainly plastic film, paper, metal foil followed and composite materials. They can be used to make the following various kinds of composite packaging materials:
1, paper and paper; 2, paper and metal foil; 3, paper and plastic film; 4, plastic film and plastic film; 5, plastic film and metal foil; 6, plastic film and metal film; 7, plastic film and substrate materials; 8, plastic film and plastic film, 9 inorganic compounds; film and organic compound film; 10, amorphous plastic film and plastic film; 11, substrate and nano composite nanoparticles; 12, substrate coated or impregnated with special additives; 13, composite multilayer composite etc..
Three, classified according to the compound form. In general, the material composition is mostly carried out uniformly on the whole surface. The composite forms of packaging materials are mainly included in the following categories:
1, a large area (uniform) composite;
2, local, if only in part or parts of the packing and sealing strengthening composite strengthening or give some functions;
3, composite sheet or composite bag, will set a special function to play the overall function;
4, gradient composite (or inhomogeneous composite). According to the need in the direction of thickness of the composite film (or length) change of concentration, adding material composition or thickness;
5, special compound, such as mesh pattern composite etc..
Four, according to the compound function classification. As for the packaging industry, due to the different requirements of product packaging in different industrial sectors, different systems have different classifications. At present, there are no uniform provisions and standardized terms. According to the new packaging system advocated by Europe and America in the near future, it can be divided into the following 10 categories.
1, reinforced composite packaging; 2, high permeability composite packaging (gas resistance, water resistance, oil resistance); 3, anticorrosion type (anticorrosive antirust) composite packaging, etc.