Polyurethane Technical Data

Polyurethanes are some of the most versatile plastic materials to date. What makes polyurethane incredibly useful is its ability to be molded into a seemingly infinite number of shapes, sizes, and hardness ranges (durometers), allowing it to adapt to some of the most challenging applications. See our polyurethane technical data tables below.

Polyurethane

Polyurethane holds the characteristics of both plastic and rubber, making it incredibly durable yet also resilient. The inherent characteristics of rubber and plastic combined in polyurethane allow it to hold up against repeated impact, abrasion, chemicals, and heat, making it the ideal polymer for demanding situations (data in following chart based on our PTMEG polyether formulation).

Common Durometers	Tensile (psi)	100% Modulus (psi)	300% Modulus (psi)	% Elongation at Break	DieC Tear (D624) in pli	Split Tear (D1938) in pli	Compression Set	Rebound %	Operating Temp (Gen)
93-97A	7500	2200	5000	350	545	130	32	48	-80℉ to 200℉
90A	6480	1100	2100	450	455	110	30	48	-80℉ to 200℉
81-85A	5300	780	1400	580	270	60	28	60	-80℉ to 200℉
71-80A	2835	460	800	560	250	30	31	ND	-80℉ to 200℉
65-70A	2500	360	555	600	215	25	23	ND	-80℉ to 200℉

Uniflex Performance Series Polyurethane (Vulkollan® equivalent)

Uniflex offers an ultra-high-performance grade polyurethane series that outperforms Vulkollan® on almost every basis (see table below). Our Performance Series polyurethanes are capable of competing head on with Vulkollan® and often take its place due to their enhanced physical properties and economic price. Whether its roller coaster wheels, high load casters, or valve seats, Uniflex’s Performance Series polyurethane is guaranteed to perform. See the high performance polyurethane technical data tables below.

Physical Properties	UNIFLEX HIGH PERFORMANCE PU BLEND A (UNIDUR 7400HP)	Vulkollan(NDI)	PPDI	UNIFLEX HIGH PERFORMANCE PU BLEND B (UNIDUR 5000HP)
Hardness, Shore	93A	92A	93A	93A
Elongation, %	760	740	580	650
Tensile Strength, psi (MPa)	7400 (51.0)	7100 (53.1)	6100 (42.1)	5000 (34.4)
Split Tear, pli (kN/m)	490 (86)	310 (54)	400 (70)	440 (77)
Bayshore Rebound, %	68	62	68	57

	UNIFLEX HIGH PERFORMANCE PU BLEND A (UNIDUR 7400HP)	Vulkollan (NDI)	PPDI	UNIFLEX HIGH PERFORMANCE PU BLEND B (UNIDUR 5000HP)
Physical Properties	Excellent	Excellent	Excellent	Good
Dynamic Properties	Excellent	Excellent	Excellent	Good
UV Resistance (Yellowing)	Excellent	Significantly Darkens	Yellows	Yellows
Storage Stability and Handling	Excellent	Limited	Good	Good
Processing Ease	Excellent	Short shelf life	Fair	Good
Post Cure Processing	Standard	Complex	Standard	Standard

Common Applications

High Load Wheels and Casters
Roller Coaster Wheels
Elevator Wheels
Valve Seats
Seals and O-rings
Plunger pump parts
Slurry and mud handling equipment
Equipment Liners
Scrapers
Doctor blades
Bumpers and shock absorbers
Vacuum grippers
Roller Covers
Elastic couplings
Forklift tires
Agricultural equipment parts
Gaskets and Stripper rings
In-line skate wheels
Skateboard and scooter wheels

Durometer

Durometer is the measure of a materials hardness. Polyurethane is often measured on the Shore OO, A, and D scale where OO represents very soft to medium hard materials, A represents soft to very hard materials, and D represents medium hard to extra hard materials. There is overlap amongst the scales and is represented in the diagram below, which displays equivalency to the other scales and common products.