Plastic At a Glance

Property	Units	Nylon 6	Cast Nylon	Delrin	PP	HDPE	PVC	UHMWPE
Chemical Name	-	Polyamide	Cast Polyamide	Polyacetal	Polypropylene	High Density Polyethylene	Poly Vinyl Chloride	Ultra High Mol. wt. Polyethylene
Hardness	Rockwell / Shore D	R 119	R95 - R120	M78 - 80	80 - 110	D60 - 70	D65 - 85	D60 - 70
Resistance to Heat	°C	80° - 120°	121° - 149°	80° - 120°	110°	80°	65°	120°
Specific Gravity	gm/cm³	1.14	1.17	1.41	0.91	0.965	1.58	0.95
Tensile Strength	-	11000	14000	8800	5500	5500	7500	3500
Elongation at Break	%	100 - 300	30 - 320	40 - 75	200 - 700	20 - 1300	40 - 80	500
Comprehensive Strength (PS2)	PSI	13000	-	18000	5500 - 8000	2700 - 2800	6000 - 13000	2400
Coefficient of Friction	-	0.37	0.35	0.18	0.3	0.08 to 0.18	0.45	0.03 - 0.08
Thermal Conductivity	10⁴ Cal Sec/cm³°Cm	5.8	-	5.5	2.8	11 to 12.4	3.5 to 5	11 - 12.4
Thermal Expansion	10⁻⁵ per °C	8.3	9.0	8.5	5.8 to 10.2	11 to 13	5.0 to 10.0	7.2
Di-electric Constant	IKHZ	3.7	3.7	3.7	2.2 to 2.6	2.3 - 2.85	3.0 to 3.8	2.25 - 2.35
Resistance to Weak Acids	-	Resistant	Resistant	Resistant to Some	None	Resistant	None	Very Resistant
Resistance to Strong Acids	-	Attacked	Attacked	Attacked	Attacked Slowly	Resistant	None	Attacked Slowly
Resistance to Weak Alkalis	-	None	None	Attacked	None	Very Resistant	None	Very Resistant
Resistance to Strong Alkalis	-	Resistant	Resistant	Attacked	Resistant	Very Resistant	None	Very Resistant
Resistance to Organic Solvents	-	Resistant to Common Solvents	Resistant	Excellent Resistant	Resistant below 80°C	Very Resistant	Resistant to Some	Resistant below 80°C