Carbon fiber reinforced polymer as epoxy, but other thermoset or thermoplastic polymers, such as polyester, vinyl ester, or nylon, are sometimes used. The composite material may contain aramid (e.g. Kevlar, Twaron), ultra-high-molecular-weight polyethylene (UHMWPE), aluminium, or glass fibers in addition to carbon fibers. The properties of the final CFRP product can also be affected by the type of additives introduced to the binding matrix (resin). The most common additive is silica, but other additives such as rubber and carbon nanotubes can be used. The material is also referred to as "graphite-reinforced polymer" or "graphite fiber-reinforced polymer" ("GFRP" is less common, as it clashes with
Polymer substrate Australia CSIRO. Countries like Bulgaria have issued a combination of paper and polymer as the 200 Lev banknote. Polymer substrate Polymers and plastics known as polymer substrates are used for banknotes and other everyday products. The banknote is more durable than paper, won't become soaked in liquids and is harder to counterfeit, though not impossible. Countries whose whole banknote production is in polymer are: Australia, Romania, Vietnam and New Zealand. Other countries that have partial polymer and paper issue include Papua New Guinea, Samoa, Solomon Islands, Mexico, Zambia, Brunei, Malaysia, Singapore, Nigeria, Chile, England and Nepal. The material is also