	PETE	HDPE	V	LDPE	PP	PS
Transparency	Clear	Translucent	Translucent	Translucent	Translucent	Clear
Max Useable Temp	140 F	248 F	158 F	176 F	275 F	158 F
Brittleness Temp	14 F	-148 F	-22 F	-148 F	32 F	71.6 F
Moisture Barrier	Good	Excellent	Fair	Good	Excellent	Fair
Sunlight Barrier	Good	Fair	Fair	Fair	Fair	Fair
Oxygen Barrier	Good	Poor	Good	Poor	Poor	Fair
Tensile Strength, PSI	8000	4000	5000	2000	5000	6000
Flexibility	Semi	Semi	Rigid	Flexible	Rigid	Rigid
Resistance to Impact	Excellent	Excellent	Good	Excellent	Good	Fair
Invented	by J. R. Whinfield and J. T. Dickson, 1940.	by Robert L. Banks and J. Paul Hogan, 1951.	by Waldo Semon, 1926.	by Eric Fawcett and Reginald Gibson, 1935.	by Robert L. Banks and J. Paul Hogan, 1951.	by Eduard Simon, 1839.

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