Material Specifications

Plastic Properties

	Polyethylene						Vinyl
Properites	Low Density	Medium Density	High Density	Polypropylene	Ethylene Vinyl Acetate	Thermoplastic Rubber	Standard	High Temp.
Specific Gravity	0.910-0.925	0.926-0.940	0.941-0.965	0.902-0.906	0.931-0.933	0.94	0.98-2.0	1.22-1.32
Tensile Strength P.S.I.	600-2300	1200-3500	3100-5500	4300-5500	1700-2000	2750	50-5000	2175mm
Elongation %	90-800	50-600	15-100	200-700	700-800	600	50-550	175mm
Compressive Strength P.S.I.	—	—	3200	5500-8000	—	—	—	—
Flexural Stength P.S.I.	—	4800-7000	1000	6000-8000	—	—	—	—
Specific Heat Cal/C/gm	0.55	0.55	0.55	0.46	0.55	—	—	—
Resistance To Heat °F	180-200	220-250	250	250-320	160-185	300	300-325	450
Heat Distortion Temperature °F	100-121 (66 P.S.I.)	120-165 (66 P.S.I.)	140-180 (66 P.S.I.)	205-230 (66 P.S.I.)	95-105	—	—	—
Water Absorption %24 hr. 1/8" Thickness	<0.01	0.01	0.01	0.01	0.005-0.13	—	—	—
Effect of Sunlight	Crazes rapidly unless black colour or ultraviolet inhibitor is used	Crazes rapidly unless black colour or ultraviolet inhibitor is used	Crazes rapidly unless black colour or ultraviolet inhibitor is used	Crazes Rapidly	Crazes rapidly unless black colour or ultraviolet inhibitor is used	Excellent Ozone Resistance	Excellent Ozone Resistance	Good Ozone Resistance
Effect of Weak Acids	Resistant	Very Resistant	Very Resistant	None	Resistant	Resistant	Resistant	Resistant
Effect of Strong Acids	Attacked by Oxidizing Acid	Attacked by Slowly Oxidizing Acids	Attacked by Slowly Oxidizing Acids	Attacked by Oxidizing Acid	Attacked by Oxidizing Acid	Resistant	Fair Resistance	Fair Resistance
Effect of Weak Alkalies	Resistant	Very Resistant	Very Resistant	None	Resistant	Resistant	Resistant	Fair
Effect of Strong Alkalies	Resistant	Very Resistant	Very Resistant	Very Resistant	Resistant	Resistant	Fair Resistance	Poor
Effect of Organic Solvents	Resistant Below 60°C	Resistant Below 60°C	Resistant Below 80°C	Resistant Below 80°C	Resistant Below 50°C	Resistant	Fair Resistance	Poor
Effect of Oils and Greases	Attacked by Some	Attacked by Some	Slight	Attacked by Some	Attacked by Some	Somewhat Resistant*	Fair Resistance	Poor
Impact Strength ft./ lb./ ln Notch	No Break	0.5-16	1.5-20	0.4	No Break	No Break	—	—

ASTM test methods apply. Caps'n Plugs cannot be held responsible for the accuracy of these figures.

* = Hydrocarbons will cause thermoplastic rubber to swell if soaked; it will not affect the properties. It is resistant if only splashed with hydrocarbons.

Tolerances on Injection Moulded Parts:

• Tolerances on all decimal dimensions ±0.010 per inch.
  Example: 1.000 ±0.010 = 0.010"
  Example: 2.500 ±0.010 per inch = 0.025"
• Tolerance for fractional dimensions ±1/32" per inch.

Tolerances for Vinyl Dip Moulded Parts:

• Round Part Inside Diameter ±0.005"
  Part Inside Length ±0.063"
  Part Wall Thickness ±0.010"

Rubber Properties

Compounds	Silicone	EPDM	Neoprene	NR	NBR	SBR	Viton	Hypalon
Properties
Hardness (Shore A)	25-80	40-80	40-90	30-90	40-90	40-90	50-80	40-80
Temperature Range °C	-100 ~ 315	-37.2 ~ 121.1	-45.6 ~ 126.7	-42.7 ~ 98.8	-40 ~ 101.7	-42.6 ~ 101.7	-40 ~ 260	-37.2 ~ 121.7
Max Tensile Strength (Mpa)	14	17.6-21	17.6-21	24.6-28.2	7.0-24.6	14-17	14	21
Max Elongation %	300-600	500-800	600-800	500-600	500-600	300-500	300	500
Resilience	E	G	G	E	F-G	G	P	P
Abrasion	P	G	G	E	G	G	G	P
Tear Resistance	P	G	G	E	F	F	F	F
Electrical Insulation	E	E	F	E	P	G	G	G
Flame Resistance	G	P	E	P	P	P	G	G
Ozone Resistance	E	E	E	P	F	F	E	E
UV Resistance	E	E	G	G	G	F	E	E
Moisture Resistance	G	E	G	G	F	G	E	G
Acid Resistance	P	G	G	F	G	F	E	E
Solvent Resistance	P	F	G	P	P	P	E	G
Oil Resistance	F	P	G	P	E	P	E	G

P = POOR, F = FAIR, G = GOOD, E = EXCELLENT. The above information is offered as a guide only.