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The strip packaging (SP) uses two layers of medicinal strip packaging film to sandwich medicines and health foods. The unit products are separated by a certain distance, and the two layers of film around the product are heat-sealed on the strip packaging machine. Between the pressure marks on the teeth, the formation of a form of unit packaging, single package or row of small packages can be composed.
The requirements for composite membrane materials are to ensure that there is a certain degree of mechanical strength, and no breakage damage will occur during the packaging and circulation of health foods, pharmaceuticals and drugs. It is required that each layer of the composite material has good peeling strength to prevent delamination phenomenon in each layer and requires good high temperature resistance performance. Because in the health food, pharmaceutical packaging requires high temperature sterilization or heat sealed bag sealing at high temperature. It must also have low permeability to gases and moisture, and has good barrier properties to gas moisture. Most of the currently used multi-layer composite packaging materials are composed of two or more kinds of films, and other materials such as paper and aluminum foil, and the films of each layer are connected with a binder. According to the packaging requirements of different health foods and medicines, selecting the films with different properties for reasonable combination can concentrate the advantages of each layer of the film and fundamentally overcome certain deficiencies of the single film in the pharmaceutical packaging performance.
Since the composite membrane is composed of a variety of different structures and has a wide variety of products, in order to identify and distinguish different composite membranes, it is generally marked as: the outer layer material is polypropylene (PP), the intermediate material is aluminum foil (AL), and the inner layer material is polyethylene. The composite film composed of (PE) is PP/AL/PE.
Composite film according to the composition of its materials, divided into paper composite film, plastic composite film, aluminum-plastic composite film; according to different composite process methods can be divided into: co-extruded film, extrusion coating, laminated film. The most commonly used laminating composite method is a composite method in which an adhesive is stuck on a film and another film is heated and pressed together. According to different production processes, this method is also divided into two types: dry composite and wet composite. Dry composite method refers to a composite film that is uniformly coated with a layer of adhesive on a composite substrate (film), dried by removing the solvent through drying channels, and bonded with other composite substrates under hot pressing. The wet compounding method refers to coating a layer of water solvent adhesive on the surface of a composite substrate, pressurizing under the condition that the adhesive is not dry, and bonding the composite substrate with a pressure roller and other composite substrates and then drying the film through a drying tunnel. . The dry type and the wet type are basically similar. The difference is mainly that the drying process and the pressing process sequence are different. The dry compounding is the first drying after the pressing, and the wet compounding is the first pressing after the drying.
The common features of the two laminating methods are simple process, easy operation and fast compounding speed. At present, most composite films of health foods and medicines are compounded by this process, and the solid dosage forms of health foods, Chinese and Western medicines such as granules, powders, and powders are widely used in the packaging of strip composite films, and are the development of future health food and medicine packaging. Mainstream.
Bar Composite Film: Granules Powder Packaging Mainstream
For some of the larger formulations of health foods, medicines such as granules, powders and hygroscopicity, UV-sensitive health foods, pharmaceuticals, using a strip composite film packaging is more appropriate.