Polyurethane (click and jump to)
Silicone (click and jump to)
Properties (click and jump to)
Quality control (click and jump to)

Polyurethane

Dataroll Ltd produces a wide range of polyurethane compounds comprising ester, ether, MDI and TDI systems ranging in hardness from 20° A Shore to 80° D shore. Small selections of compounds are listed below.

Compound	Hardness	Features
P 100 series	10 - 25°A	Extremely soft, good memory, low mechanical strength
P 300 series	30 - 60°A	High performance for printing and coat roll applications. Excellent resistance to abrasion, tear and a high load bearing capacity in tension, compression and shear.
P 600 series	60 - 73°A	High strength, low softness, highly abrasive resistant material and low compression set
P 750 series	75 - 90°A	High tensile strength and resilience, and excellent resistance to abrasion, compression set, oils, solvents, oxidation, ozone and low temperatures.
P 950 series	95° A	An intermediate grade bridging the gap between rubber and plastic. In addition to the properties above it is extremely tough and resilient.
P 1500 series	40 - 80° D	Hard and tough approaching the strength of structural plastics. High impact strength, resistance to abrasion and deformation and resistant to the deteriorating effects of heat, water, oxygen, ozone, oils and most solvents.
P 1700 series	78 - 85° D	Speciality polyurethane materials combining the rigidity of a structural plastic and high load bearing, low tooling costs, easily machinable, good insulation, machine proving.

Silicone

Dataroll can cast a wide range of Silicones ranging in harnesses from 3° A Shore to 70° A Shore. In general, silicones are not as tough as rubber or polyurethane but can operate at much higher temperatures e.g. continuous running at 200°C.

Silicones tend to be more expensive than rubber or polyurethane but the overall cost can be minimised by incorporating low cost tooling.

Near net shape castings are achievable and the harder grades, 30°A Shore, may be machined to final size.

Properties

The properties listed below highlight some of the unique characteristics of polyurethane. More detailed information may be obtained by contacting Dataroll.

Abrasion resistance:
Excellent compared to rubber, plastics and some metals offering a potential 3-4 times better life expectancy. As a general rule the abrasion resistance increases with increasing hardness and the coefficient of friction gets less with increasing hardness.

Bonding:
Polyurethane can be bonded to a wide variety of substrates e.g. metal, plastic and wood. Care and meticulous preparation ensure superb polyurethane to component bond strength, often stronger than the strength of the polyurethane.

Chemical resistance:
· Water excellent up to 50°C
· Oxygen and ozone good - making it suitable for outdoor applications
· Wide resistance to most chemicals make it the right choice for most situations. However certain strong solvents may attack polyurethane necessiting further advice and strong acids/strong alkalies should be avoided.

Food grades:
FDA approvals are available for both dry contact and wet contact applications.

Resilience:
Properties are good, can be used for shock absorbing applications and for the damping of high frequencies.

Strength:
Excellent compressive strength resulting in higher load capacities than for other elastomers and a high load bearing capacity in shear. Superior impact resistance outperforming most plastics. Good cut and tear resistance properties.

Temperature:
From -30°C to 90, 120 and 200°C

Weight:
With a specific gravity of 1.2 it can offer a significant weight advantage compared to metals.

Flame retardancy:
Some polyurethane's can incorporate additives to improve its performance in fires, to enable it to meet some non-burning and self-extinguishing specifications.

Quality Control

Rigorous procedures, batch control, 30 years experience and inspection, operating to ISO 9000, ensuring long term batch consistency and guarantee of product quality.