What Is Flexible Packaging

It is generally believed that the so-called composite flexible packaging material is a new type of high-quality material that can give full play to the advantages of each component material and form a composite of two or more materials with different properties by means of coating, hot pressing, bonding, mixing, impregnation, and physical deposition. Performance packaging materials [1]. The base materials for making packaging composite materials mainly include plastic, wood, rubber, metal, graphite, porcelain and so on. Composite packaging materials mainly include reinforced packaging materials, special packaging materials, functional packaging materials and intelligent packaging materials.

1. Classified by composite process.

At present, composite materials for flexible packaging are classified according to processing methods, mainly including:

① Dry coating organic solvent adhesive composite flexible packaging;

② Wet coating inorganic adhesive composite flexible packaging;

③ Extruded film laminated composite flexible packaging;

④ Multi-layer co-extrusion ) Composite flexible packaging material;

⑤ hot melt coating composite flexible packaging material;

⑥ solvent-free (ie solid adhesive) composite flexible packaging material;

⑦ physical vapor deposition composite flexible packaging material;

⑧ chemical vapor deposition composite flexible packaging material;

⑨ Mixing type composite flexible packaging materials;

⑩ combination of composite flexible packaging materials with the aforementioned methods [2].

2. Classified by compound function.

As far as the packaging industry is concerned, since each industry sector has different requirements for product packaging, different systems have different classification methods. At present, there is no unified regulation and standardized terminology. According to the "new packaging system" advocated by Europe and the United States recently, it can be divided into the following categories:

① reinforced composite packaging; (rust) composite packaging;

② anti-electromagnetic field interference composite packaging;

③ antistatic composite packaging; Composite packaging for cooking (such as cooking, microwave baking, etc.);

④ intelligent composite packaging; ⑩ultramicronano composite packaging[2].

3. Classified by composite material.

As we all know, the substrates used for flexible packaging composites are mainly plastic films, followed by paper, metal foil and composite materials. They can be used to make the following types 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 matrix material;

⑧ plastic film and inorganic compound film;

⑨ plastic film and organic compound film;

⑩ amorphous plastic film and plastic film.

Applications and Features :

Composite flexible packaging can replace traditional glass bottles and metal cans in some fields. The current main application fields include food, beverage, medicine, cosmetics and other product packaging, such as packaging of instant noodles, beverages, sausages, etc. Compared with other packaging materials. The characteristics of composite flexible packaging are:

① strong protection function;

② light weight and softness;

③ less empty volume in the package;

④ various shapes;

⑤ good dimensional stability and a wide range of applicable products;