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All Plastic Canisters Are Not The Same
FDA
The Food and Drug Administration (FDA) is the regulatory agency of the United States government that is responsible for determining how materials may be used in contact with food products. The FDA participates in publication of The Federal Register, which contains The Code of Federal Regulations (CFR), a codification of the general rules established by the Executive departments and agencies of the Federal Government. The Code is divided into 50 titles which represent a broad subject matter.
Definitions for proper use of food contact materials are found in a series of regulations published annually under The Code of Federal Regulations (CFR) Title 21. Title 21 - Food and Drugs is composed of nine volumes, which are subdivided into Parts. Part 177 - Indirect Food Additives: Polymers lists standards for polymers acceptable for use in components of single and repeat use food contact surfaces. Part 178 - Indirect Food Additives: Adjuvants, Production Aids, and Sanitizers includes standards for certain polymer additives. Parts are divided into Sections identified by chemical family which indicate physical, chemical, and compositional requirements, as well as acceptable service conditions for food contact. Regulations generally limit the extractable substance when exposed to selected solvents.
Within the FDA, there is no government-operated process of inspection of plastics produced for food contact use. Rather, the FDA in their regulations provides certain specifications regarding composition, additives, and properties. A material which meets these standards can then be stated as FDA COMPLIANT. End users should note that it is their responsibility to use the product in a manner compatible with FDA guidelines.
For further information on FDA regulations, contact the U.S. Food & Drug Administration, Office of Premarket Approval HFS-216, 200 C. Street SW, Washington, DC 20204, by phone at (202) 418-3080, or visit them at http://www.fda.gov on the Internet.
Polypropylene is an economical material that offers a combination of outstanding physical, chemical, mechanical, thermal and electrical properties not found in any other thermoplastic. Compared to low or high density polyethylene, it has a lower impact strength, but superior working temperature and tensile strength.
GENERAL PROPERTIES
Polypropylene provides excellent resistance to organic solvents, degreasing agents and electrolytic attack. It has a lower impact strength, but its working temperatures and tensile strength are superior to low or high density polyethylene. It is light in weight, resistant to staining, and has a low moisture absorption rate. This is a tough, heat-resistant, semi-rigid material, ideal for the transfer of hot liquids or gases. It is recommended for vacuum systems and where higher heats and pressures are encountered. It has excellent resistance to acids and alkalines, but poor resistance to aromatic, aliphatic and chlorinated solvents.
FEATURES
• Lightweight
• High tensile strength
• Impact resistant
• High compressive strength
• Excellent dielectric properties
• Resists most alkalis and acids
• Resists stress cracking
• Retains stiffness and flex
• Low moisture absorption
• Non-toxic
• Non-staining
• Easily fabricated
• High heat resistance
High Density Polyethylene (HDPE)
Representing the largest portion of the polyethylene applications, HDPE offers excellent impact resistance, light weight, low moisture absorption, and high tensile strength. HDPE is also non-toxic and non-staining and meets FDA and USDA certification for food processing.
GENERAL PROPERTIES OF POLYETHYLENES
Polyethylenes provide good resistance to organic solvents, degreasing agents and electrolytic attack. They have a higher impact strength, but lower working temperatures and tensile strengths than polypropylene. They are light in weight, resistant to staining, and have low moisture absorption rates.
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