Pvc blister packing machine|Summary of common types and applications of composite packaging materials

Pvc blister packing machine

Types of composite packaging materials
Application of composite packaging materials

(1) Types of composite packaging materials
Composite material is a material composed of two or more substances with different properties combined together; while composite packaging material follows the combination of promoting strengths and avoiding weaknesses in microstructure, giving full play to the advantages of the composed materials, expanding the scope of use, improving Economic benefits make it a more practical and complete packaging material. Therefore, the performance of composite packaging materials is much superior to that of any single traditional packaging material. Common composite packaging materials are cellophane/plastic, paper/plastic, plastic/plastic, paper/metal foil, plastic/metal foil, cellophane/plastic/metal foil, etc. In addition, there are drylaid/plastic, drylaid/plastic/other materials, and more.

(2) Application of composite packaging materials
① In food packaging
At present, the composite packaging materials used in the food industry are the most. For example, foil/wax/tissue (for chewing gum packaging), foil/tissue/wax (for chocolate packaging), foil/grease-resistant adhesive/parchment (for tallow, cheese packaging), etc. Generally speaking, composite packaging materials have the characteristics of water resistance, oil resistance and heat resistance, and are widely used.
② In pharmaceutical packaging
Western medicines are divided into tablets, powders, injections, etc. In the past, their packaging focused on plastic and glass. Later, the blister packaging material has been greatly developed. The use of this packaging has the advantages of low production cost, fast processing speed, and good performance of protecting medicines, which is economical and convenient for patients. According to preliminary statistics, it is now growing at an annual rate of 8%. Blister packaging is actually one of the applications of composite packaging materials. The thinning result of aluminum foil is aluminized film (VAM), which uses polyethylene (PE)/VAM/paper/PE to package medicines. At present, there are many composite packaging materials used in this area, such as PVDC/VAM/PP (polypropylene), PET (polyester film)/VAM/paper/PE and so on.
③ In the packaging of sundries
A typical example of a commonly used composite packaging material is a label paper, or self-adhesive label, which is attached to the commodity, also known as "post-it notes" (JAC). It has gained widespread adoption on the shelves of many optional (super) markets. On this composite label paper, various exquisite patterns can be printed. When using, just peel off the coated paper of the surface layer (including the adhesive layer) and stick it on the product. The structure of composite trademark paper is usually divided into 5 layers: the first layer (surface layer) is coated paper, with color patterns and related text, price code, etc. printed on the surface; the second layer is the adhesive layer (self-adhesive), which is generally used Acrylic resin glue; the third layer is an anti-adhesive layer (coated with silicone rubber and polymethylethoxysilane); the fourth layer is a reinforcing layer (coated with high-pressure polyethylene, paraffin and polyvinyl chloride, etc.); the fifth layer is The layer (bottom layer) is colored yellow kraft paper or parchment paper, which is used to carry the top layer paper. The total basis weight (5 layers) of the composite label paper is more than 180 g/square meter, and it is required that this kind of paper can be "peeled easily and stick firmly", which saves time and is easy to use.