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It is sometimes convenient to categorize packages by layer or function: primary, secondary, tertiary,etc. Primary packaging is the material that first envelops the product and holds it. This usually is the smallest unit of distribution or use and is the package which is in direct contact with the contents.
Additionally, primary packaging, also known as retail packaging or consumer units, is responsible for the marketing aspects of food packaging. [5] Typically, the packaging materials used in the primary level include cardboard cartons, plastic trays, glass bottle and multi-layerd structure ( Tetra Pak ).
Multi-layered packaging are multilayer or composite materials using innovative technologies aimed to give barrier properties, strength and storage stability to food items, new materials as well as hazardous materials.
The term cosmetic packaging is used for containers (primary packaging) and secondary packaging of fragrances and cosmetic products. [ 1 ] [ 2 ] Cosmetic products are substances intended for human cleansing, beautifying and promoting an enhanced appearance without altering the body's structure or functions.
Packaging engineering, also package engineering, packaging technology and packaging science, is a broad topic ranging from design conceptualization to product placement. All steps along the manufacturing process, and more, must be taken into account in the design of the package for any given product.
The closure is often the most critical part of a package, and must fulfill all of the basic functions of packaging in addition to being easy to open and (if applicable) reclose. [3] Depending on the contents and container, closures have several functions:
A plastic bag, poly bag, or pouch is a type of container made of thin, flexible, plastic film, nonwoven fabric, or plastic textile.Plastic bags are used for containing and transporting goods such as foods, produce, powders, ice, magazines, chemicals, and waste.
Internal packaging materials are also used for functions other than cushioning, such as to immobilize the products in the box and lock them in place, or to fill a void. Design factors [ edit ]
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