Aluminum-plastic strip composite film packaging for pharmaceutical tablets

For the selection of some larger dosage forms of pharmaceutical tablets or pharmaceutical tablets that are sensitive to UV light, have strong hygroscopicity, require heat and cold resistance, and require long validity periods and improved packaging quality, strip composite film packaging, referred to as SP, is mostly used. (stripPackaging). It uses two layers of pharmaceutical strip packaging film (SP) film to sandwich the tablets in the middle, with a certain distance between unit drugs. The inside of the two layers of SP films around the drugs are heat-sealed on a strip packaging machine, and the drugs are pressed The upper tooth marks form a form of unit packaging (single piece packaging or small packaging in rows). Bar packaging is a continuous operation on a bar packaging machine, which is especially suitable for large-volume automatic packaging. When taking medicine, just tear the SP film along the tooth marks. The strip packaging film has a certain tensile strength and elongation, is suitable for medicines of various shapes and sizes, and is tightly attached to the medicines inside after packaging, making it less prone to cracks and wrinkles. At present, aluminum-plastic composite films are more commonly used, such as cellophane, aluminum foil and polyethylene composite (PT/AL/PE), polyester, aluminum foil and polyethylene composite (PET/AL/PE), that is, aluminum foil and plastic film are bonded together. The mixture is laminated or extruded, and consists of a base layer, a printing layer, a high barrier layer, and a sealing layer. The base layer is outside, the heat sealing layer is inside, and the high barrier layer and printing layer are in the middle. The base material is required to have excellent mechanical properties, glossy printability, good transparency, high barrier properties, safety and non-toxicity, and no heat sealability. Typical materials include polyester (PET), cellophane (PT) and cellophane with PVDC coating. The high barrier layer must have good gas barrier properties, be moisture-proof, impermeable to bacteria and microorganisms, have good mechanical properties, have a certain elongation, be cold and heat resistant, safe and non-toxic. Its typical material is soft aluminum foil. But this soft aluminum foil is opaque, does not rust itself, and has strong light-shielding properties. If a transparent strip packaging film is required, PVDC should be used as a high barrier material. PVDC is used as a high barrier layer material, and its biggest feature is its excellent barrier properties against gas and water vapor. The sealing layer is the inner layer of the strip packaging film. It has excellent heat sealability, chemical stability, safety and hygiene. It is generally made of low-density polyethylene material. 

What type of composite film a pharmaceutical company chooses for drug packaging depends on the nature of the drug (moisture, oxidation, retention of medicinal flavor, etc.) and shelf life. It is mainly based on the quality characteristics required by the drug and combined with the characteristics of the composite product. The following are several Characteristics of medicinal composite membranes for reference:

a. Ordinary composite film: The composite structure is composed of polyester, aluminum foil and polyethylene (PET/AL/PE). It is characterized by good printing adaptability and good gas and moisture barrier properties for drugs.

b. Medicinal strip-shaped easy-to-tear composite film: The composite structure is composed of cellophane, polyethylene and aluminum foil (PT/PE/AL/PE). Features: It has good tearability and is convenient for consumers to take the product. Good gas and water vapor barrier properties ensure a long shelf life of the contents. Suitable for packaging of effervescent agents, coatings, tablets and capsules and other medicines.

c. Paper-aluminum-plastic composite film: The composite structure is composed of paper, polyethylene and aluminum foil (paper/PE/AL/PE). It is characterized by: good printability and good stiffness. It has good barrier properties against gas or water and can ensure a long shelf life of medicines.

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