High Performance Polymers
High-performance polymers stand head and shoulders above enginee-ring plastics thanks to their specific spectrum of properties. PPS is cha-racterised by outstanding chemical resistance at continuous operating temperatures of up to 240 °C and by outstanding creep resistance. The long-term operating temperature of LCP also extends as high as 240 °C.In the short term, it can even withstand temperatures of up to 340 °C. Both materials are inherently flame-resistant. Combining them with long-fibre technology can lead to considerable improvements in both creep resistance and dynamic load capacity.
In comparison with conventional polyamides, high-temperature polyami-des are characterised by an elevated glass transition point and melting point. Continuous operating temperatures of up to 230 °C can be achie-ved using special additives. Partially aromatic constituents lead to increa-sed dimensional stability and creep resistance. Long-chain constituents improve the chemical resistance, especially with respect to aggressive salts. This group includes PA 4.6, PA 4T, PPA and PA 10T.
Polyamide 6, 66 and PA 66/6 blends, are characterised by out-standing workability and balanced technical properties. General heat stabilisation processes lead to continuous operating temperatures of up to 160 °C. Specific stabilisation can raise this level to up to 210 °C. Ad-ditional modifications of the viscosity and sliding friction behaviour pave the way for a broad range of applications in the automotive, mechanical engineering, furniture and sports industries. Long-fibre technology can be used to bring about considerable improvements in heat resistance, creep behaviour and dynamic force absorption.
Soft, flexible materials are no exception when it comes to meeting the required thermostabilities. Thermoplastic elastomers are characterised by good resilience and a broad range of hardness grades (Shore A 40 – Shore D 50). The products withstand continuous operating temperatures of 110 °C. In the short term, exposure to temperatures of up to 150 °C is also possible. In the event of even higher thermal requirements, it is pos-sible to use TPC (thermoplastic copolyester). These ranges of products are available in continuous operating temperature classes ranging from 120 °C to 175 °C
Transparent acrylic solutionsfor high heat requirements
For requirements concerning transparency and maximum thermal sta-bility, the material PMMI will stand the toughest specifications. PMMI is characterised by a transparency of over 90 % while keeping the optical properties on exposure to temperatures of up to 170 °C.
PMMA is often used in interior automotive applications where thermal requirements and transparency or extreme high gloss finishes are a must. With the greatest transparency, more than 90 %, and outstanding weathering resistance, PMMA will stand continuous operating tempera-tures up to 110 ºC
Styrenic materials forautomotive applications
Heat-resistant ABS is predominantly used in the automotive industry. Components can withstand exposure to elevated temperatures reaching as high as 115 °C, e.g. for external bodywork parts, seat base covers or seat parts. ABS is excellently suited to dyeing but can also be painted. Where external bodywork parts are not painted, ASA is used. This is characterised by outstanding weather resistance.
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The specified data are only indicative and are not to be interpreted as legally binding specifications.X