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Glossary

Every industry has its own jargon, the vocabulary that is specific to that sector, and the world of plastics is no different. Workers in the plastic industry use a sometimes bewildering group of abbreviations for the materials they work with and for other purposes as well. Below are definitions of some of the more typical abbreviations.

PET - Polyethylene Terephfthalate, better known as polyester, is a clear, tough plastic that can be used with food and non-food contents. Commonly used in the production of bottles for: water, carbonated soft drinks (CDS), vegetable oil, juices and detergents. Recyclable thought mechanical and/or chemical process for bottle-to-bottle systems.

HDPE - High Density Polyethylene is a polymer derived from ethylene and commonly used by Logoplaste in the production of bottles for Milk, liquid Yoghurts, juices and detergents. It is highly chemical resistant due to its good behavior to Environmental Stress Crack Resistance (ESCR).
Frequently used at Logoplaste respectively due to it very good organoleptic properties and environmental stress crack resistance (ESCR). It is recyclable.

LDPE - Low Density Polyethylene is usually used in films, closures and also in bags for dry cleaning, bread and frozen food. It can also be used for semi-flexible containers. Good for heat-sealing uses, recyclable.

MFR - Melt Flow Rate measures the rate of extrusion of thermoplastics through an orifice at a prescribed temperature and load. It provides an indication of the material process ability and can be used to differentiate polymers and verify degradation as a result of molding.

ESCR - Environmental Stress Crack Resistance
Under certain conditions of stress and environment like oils, detergents or soaps, ethylene plastics may fail mechanically by cracking. This phenomenon is called environmental stress crack resistance (ESCR) and can be tested in accelerated tests using surface active agents, elevated temperature and mechanical loading. Tests result is the time when 50% of the bottles have failed.