DUAL DENSITY RUBBER
Dual Density Rubber (DDR) footwear soling technology first came on to the marketplace in the 1990s.
Australian footwear companies have been at the forefront of adopting this new way of making boots, with five machines now operating here.
DDR fills a niche part of the footwear market. It is revolutionary in that DDR boots can be made very efficiently (~1pr/min) and the resulting footwear is of the highest quality – ideal for safety, emergency and military applications. Three countries so far have specified DDR boots for their armies – Australia, Israel and Turkey.
DDR consists of a tough, hard-wearing outsole and a soft, impact absorbing rubber midsole (s.g. 0.6). The resulting boot is more comfortable and lighter than the old “cadet-style” direct vulcanised boot, yet still has the excellent physicals (heat, acid, oil, crack and abrasion resistance).
When compared to PU (polyurethane), DDR has better crack resistance, shelf-life and grip. It can also self-extinguish and has better temperature resistance (300 deg C to -100 deg C).
Abar Rubber’s DDR is world-leading – in terms of its processibility, consistency, surface finish and physicals.
Abar’s standard DDR midsole meets EN ISO 20344:2004 specification and:
- is anti-static
- is self-extinguishing
- has a density of 0.60g/cm3
- has a trouser tear stength of 4N/mm
Abar’s standard DDR outsole meets EN ISO 20344:2004 and:
- is antistatic
- is non-marking
- is available in any colour
- has a DIN loss abrasion resistance of <140mm3
- has flex-crack growth of <80% (2mm) after 100,000 cycles
- is heat, acid and oil resistant