Used packaging materials

The principal uses of polyfethylene terephthalate) film are electrical, particularly in capacitors, as slot liners for motors and for recording tape. Its high strength and dimensional stability have led to a number of drawing office applications. The film is also a useful packaging material whilst metallised products have a number of uses as a decorative material. 

Paper is one of the oldest and most commonly used packaging materials. Generally it is used to keep a product clean and for mechanical strength when combined with other materials. It does not protect a product from atmospheric change, but only from mechanical contaminants such as dirt. Coated papers are much more functional. Waxed papers fall into this category and provide much better protection from moisture and, in some cases, from gas (oxygen) transmission. 

The changes in the test and color or design of leaflets, labels, and boxes of (in-use) packaging materials specifications are followed as stated in the change control approval matrix of the company. 

Packaging Materials The elements intended to contain the product, ensure its physical protection and bear the necessary instructions for its use, thus contributing to its preservation, identification and proper use. Packaging materials are referred to as primary or secondary according to whether or not they are intended to be in direct contract with the product. 

Products and Uses A natural, nonsynthetic, commonly used packaging material. It is produced from wood pulp, or cellulose, by the viscose process. 

The number of circuits which can be placed on one silicon "chip" is restricted by the difficulty of keeping the wafer of silicon bonded to its ceramic substrate as it heats up. At present, the most frequently used packaging material is alumina which has a thermal expansion coefficient, nearly twice that of silicon. Differential expansion between the silicon and its substrate is containable in current packages but the manufacturers want to move to larger circuits, for faster computers and to reduce size and cost of the overall equipment, so differences in expansion set a limit on how large the circuits can be. The semiconductor companies have a real need for a substrate material with thermal expansion similar to that of silicon. (Table 3)... 

This handbook is designed to be a reference providing information on film properties of the most commonly used packaging materials. Each material chapter presents information and data on the material and its use and performance characteristics when used as a packaging film. Chapters for different materials of the same family are grouped together(e.g., polyamides [nylons] are represented by Chs. 10-17). Comprehensive references are presented for further study. 

After the Second World War, it soon became apparent that low-density polyethylene (LDPE) would be a useful packaging material. However, one serious problem was the difficulty in obtaining good adhesion to the polymer. This led to much research and development to obtain effective pre-treatments for LDPE. By about 1950, a number of pre-treatments had been developed, including the use of chlorine - - UV radiation, chromic acid etching. Flame treatment and Corona discharge treatment. 

The packaging of medical devices after cleaning and before sterilisation should protect the content (against contamination) as well as (during sterilisation) allow for removal of air and penetration of steam. The classical and most often used packaging material is sterlisation paper. Instrumentation kits are wrapped in sheets of sterilisation paper or non-woven materials that are subsequently sealed with sterilisation tape, which usually has a sterilisation indicator. 

Animal Feed Vegetation, Emissions and energy use. Packaging material. Fertilizers, Cattle farming Wastes during processing Recycling, Recall... 

With moderate hydrophilic character such as PHBV copolymers, the water barrier properties are maintained close to values corresponding to medium barrier polymer for water. In particular, the permeation properties of PHBV copolymers reveal that they could serve as useful packaging material. The PHB copolymers showed the medium barrier properties with polar molecules and the highest with polar ones. 

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