Skip to main content: Vacuum-cast polyurethane rubber (PUR rubber) – Elastomer components from 30 to 90 Shore A

Vacuum-cast polyurethane rubber (PUR rubber) Elastomer components from 30 to 90 Shore A

System construction space

2000 x 1000 x 1000 mm

Available materials

PUR rubber 30–90 Shore A in 5-Shore increments

Optional properties

Transparent, colorable, flexible, delicate

Lead time

4–12 days

Vacuum casting is ideal for duplicating models and components in elastomer construction. Starting from a master model, a silicone mold is created, which is then used to duplicate parts made of polyurethane rubber. Alternatively, parts made of polyurethane rubber can also be produced with the use of hard tools. First components can be achieved in a few days.

Materials

The material base is a transparent material. Its advantage: its colorability or, at the customer's request, the production of a transparent elastomer component. The material is available in degrees of hardness from 30 to 90 Shore-A (in 5 Shore increments). Prototypes are just as feasible as small series.

 Test methodRubber
Shore A hardnessISO 868-85selectable 30,35,40,45,50,55,60,65,70,75,80,85,90
Elongation at break [%]ISO 37-77200-300
Thermal stability [°C]T.M.A. Mettler120
Thermal stability [°C]HDT 
Shrinkage [%]5mm thickness0.1
Base color transparent
colorable selectable
Final curing at 23°C 5 days 


Shore 40 A

Mass change % after7 days14 days30 days 150 days
Diesel28.828.930.129.5
Engine oil-3.9-4.4-3.5-3.2
Brake fluid205.1294.1DestroyedDestroyed
Acetone457.6500.1DestroyedDestroyed
Tap water2.02.12.12.6
Sea water1.81.81.71.7
10% sulfuric acid1.61.61.72.1
10% hydrochloric acid1.71.71.71.7
10% sodium hydroxide solution1.61.51.51.5
Coolant2.62.83.13.2


Shore 80 A

 Mass change % after7 days14 days30 days 150 days
Diesel19.421.121.021.0
Engine oil-0.2-0.2-0.3-0.5
Brake fluidDestroyedDestroyedDestroyedDestroyed
AcetoneDestroyedDestroyedDestroyedDestroyed
Tap water2.02.02.02.0
Sea water1.91.91.81.8
10% sulfuric acid1.51.51.51.6
10% hydrochloric acid1.81.71.71.8
10% sodium hydroxide solution1.51.51.51.6
Coolant2.52.83.03.2


Shore 100 A

Mass change % after7 days14 days30 days 150 days
Diesel36.137.739.539.9
Engine oil-1.5-2.2-2.8-3.4
Brake fluid170.0245.1DestroyedDestroyed
AcetoneDestroyedDestroyedDestroyedDestroyed
Tap water1.81.81.82.6
Sea water1.71.61.61.7
10% sulfuric acid1.41.41.52.1
10% hydrochloric acid1.51.51.41.6
10% sodium hydroxide solution1.31.21.21.2
Coolant2.12.42.63.0

Your advantages

  • Initial parts possible after a few days, series production within a few weeks. 
  • Functional prototypes for all applications (cast from near-series material)
  • Alternative to materials EPDM, silicone or TPE
  • Colorability
  • Small, delicate components possible due to hard tools

1zu1direkt

Vacuum-cast polyurethane rubber (PUR rubber)

Advice tailored to your needs

At 1zu1, we help you find the perfect solution by combining the best technology with a wide range of materials. And this is implemented in the shortest possible time and with the highest technical precision.

Challenge us. What can I do for your project?

Stefan Rädler

1zu1sales
area manager Germany
T +43 5572 33 333-842
stefan.raedler@1zu1.eu

» For perfectly implemented ideas, I propose new technological paths with my customers.«

In motocross and enduro, Stefan Rädler is on difficult paths.

Stefan Rädler

1zu1sales
area manager Germany
T +43 5572 33 333-842
stefan.raedler@1zu1.eu

» For perfectly implemented ideas, I propose new technological paths with my customers.«

In motocross and enduro, Stefan Rädler is on difficult paths.

Klaus Pichler

1zu1sales
area manager Austria
T +43 5572 33 333-838
klaus.pichler@1zu1.eu

»As a cyclist, I know that excellent technology is the key to speed – and therefore to success..«

Klaus Pichler spends his free time in the saddle – he and his road bike conquer Austria’s mountains with endurance and the right pedal stroke.

Sebastian Fink

1zu1sales
area manager CH / LI / Vlbg
T +43 5572 33 333-839
sebastian.fink@1zu1.eu

“When it comes to perfect prototyping, it’s safe to say that we are the right address.”

Sebastian Fink is a trained instrument maker and plays the bass clarinet – his personal anti-stress program.

The vacuum process enables fast, efficient and cost-effective production of desired structural and molded parts. In addition, two different materials (hard and soft) can be combined during production. Inserts (magnets, threads, inserts, etc.) can also be integrated into the component.

The production process takes place in a vacuum or under negative pressure. What is the effect of this vacuum? On the one hand, it ensures bubble-free processing of the material. On the other hand, flow resistance within the mold caused by air pockets is avoided. This means that at 1zu1, we can achieve homogeneous, pore-free material properties.

  • From master model to casting mold:
    • Casting in vacuum
    • For simple components directly via a casting mold in 3D printing or milling technology: For series application 1zu1 recommends 100 to 200 pieces.
  • 3D printing of silicones: 
    • Discharging the material via nozzles or injecting a catalyst into a silicone bath 
    • Cantilevered components are possible 
    • Layered structure visible 
  • Vacuum casting materials: use of original silicone, including food-grade silicone

Polyurethane is the collective chemical term for elastic to hard plastics produced from polyalcohols and polyisocyanates. The curing reaction is a polyaddition. Polyurethanes have many uses, e.g. for the production of household sponges, adhesives, paints and floor coatings. Synthetic textile fibers such as polyurethane are also used in the fashion sector.

SHORE hardness, named after Albert Ferdinand Shore, is an indicator used primarily for elastomers and rubber-elastic polymers. It is directly related to the penetration depth and is thus a measure of the material hardness.

Elastomer materials (PU rubber) are available in various degrees of hardness from  30-90 Shore A. Thermoplastic-like materials are available in degrees of hardness from 45-85 Shore D.

Shore A3040506070809095    
Shore D      455560657080

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