PUR | CutWise

PUR (Polyurethane Rubber)

Rubber

Polyurethane rubber (PUR) is a versatile elastomer that excels in wear resistance, elasticity, and mechanical strength. The material combines the flexibility of rubber with the durability of plastic and is widely used in demanding industrial environments. PUR withstands high dynamic loads, has excellent tear and tensile strength, and offers a wide range of hardnesses from soft to very hard.
Well-known trade names for PUR include Vulkollan®, Adiprene®, Urepan®, and Elastogran®. These grades are used worldwide in industries such as machinery, transport, mining, and printing.

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Properties of PUR

Exceptional wear resistance, ideal for abrasive applications
High tensile and tear strength, even at low temperatures
Wide range of hardnesses (40–98 Shore A)
Excellent elasticity and resilience
Good resistance to oils, greases, and solvents
Resistant to ozone, UV radiation, and aging
Low compression set, maintains shape under long-term load
Good damping properties, absorbs vibrations and shocks
Suitable for food contact (depending on composition)

Thanks to these properties, PUR is a reliable choice for applications requiring both flexibility and durability.

Datasheet Title

Technical properties of PUR

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Product information and operations

Thickness	Dimensions	Color
2 mm	2000x1000 mm	Brown 70 Shore
3 mm	2000x1000 mm	Brown 70 Shore Brown 90 Shore
4 mm	2000x1000 mm	Brown 70 Shore Brown 90 Shore
5 mm	2000x1000 mm	Brown 70 Shore

Technical properties

Algemeen

Dichtheid 1,10–1,25 g/cm³

Kleur Geel / rood / zwart / op aanvraag

Wateropname < 0,5 %

Specifieke warmtecapaciteit 1,3 kj/Kg°C

Temperatuurbereik

Gebruikstemperatuur minimaal -40 °C

Gebruikstemperatuur maximaal +80 °C

Mechanisch

Treksterkte 40–60 MPa

Rek bij breuk 400–600 %

Elasticiteitsmodulus 5–15 MPa

Slagvastheid (Charpy) Hoog

Elektrische eigenschappen

Diëlektrische sterkte 20–30 kV/mm

Volumeweerstand 10¹³–10¹⁵ Ω·cm

Diëlektrische constante (1MHz) 4–6

Thermische eigenschappen

Glasovergangstemperatuur -50 °C

Max. gebruikstemperatuur +80 °C

Lineaire uitzettingscoëfficiënt 150–200·10⁻⁶/K

Warmtegeleidingscoëfficiënt 0,2–0,3 W/m·K

Applications of PUR

Drive wheels and conveyor rollers in logistics systems

Seals and gaskets in hydraulic and pneumatic systems

Wear plates and linings in mining and bulk-handling

Vibration dampers and shock absorbers in mechanical engineering

Pressure rollers and doctor blades in the graphic industry

Wheel coverings and running surfaces for in-plant transport

Molded parts and molds for concrete and plaster processing

Protective covers and bumpers in the automotive sector

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Frequently Asked Questions about PUR

What is the difference between PUR and traditional rubber?

PUR offers higher wear resistance, better mechanical strength, and a wider temperature range than traditional rubber, making it more suitable for demanding applications.

Is PUR geschikt voor buitengebruik?

Yes. PUR is resistant to ozone and UV radiation, so it won’t age quickly when used outdoors.

Can PUR be laser cut?

Although laser cutting is possible, milling or water-jet cutting is often recommended for a better finish and to avoid thermal damage.

Is PUR resistant to chemicals?

PUR has good resistance to oils, greases, and many solvents, but it is less resistant to strong acids and bases.

How does PUR perform at low temperatures?

PUR retains its flexibility and impact strength down to –40 °C, making it suitable for cold environments.

Can PUR be bonded?

Yes. With the right primers and adhesives, PUR can be effectively bonded, although mechanical fastening is often preferred for structural applications.

Is PUR food-safe?

Some PUR formulations are suitable for food contact, provided they meet the relevant FDA or EU regulations.

What are alternatives to PUR?

Depending on the application, materials such as NBR, EPDM, or silicone can be considered, but they may not offer the same combination of properties as PUR.