Page 347 - BOLA Catalogue

TECHNICAL INFORMATION
Technical Plastics
PA – Polyamides
Condensation polymers obtained either from amino acids respectively from their lactams (e. g. caproic
lactam) or diamine and dicarboxylic acid ( e. g. adipic acid and hexamethylene-diamine). In general, polyamides are defined according to the number of carbon atoms of their monomers, e. g. PA 6 = poly- carbonic lactam or PA 12 = polylauric lactam. PA 6 is the most commonly used polyamide. All polyamides are characterised by high strength and scuff resistance. The application range varies from simple turned parts such as screws or nuts to plain bearings or toothed wheels.
PMMA – Polymethylmethacrylate
...
HHH H
N C N C C C ...
H6 OH6O
n
An acrylic resin based on methyl methacrylate. It has become generally known under the trade name Plexiglas®. On the one hand, PMMA is approx. 60 times more elastic than window glass but on the other hand it is approx. 10 times more permeable than silicate glass. Of course, the hardness of its surface does not correspond to that of glass but compared with other materials it can be easily polished to high brilliance. As to weight, Polymethylmethacrylate is much more lightweight than normal window glass.
High-performance Plastics
PPS – Polyphenylsiloxan
Technical high-performance plastic. This macromolecule consists of phenylene rings and one S-atom which provide a good chemical resistance even at high working temperatures. PPS is particularly suitable for the production of moulded pieces which are exposed to high mechanical and thermal stresses. Injection moulding is the most common processing technology for this material, in addition, single components can be made of semi-finished products by cutting. Special glass-fibre reinforced compounds offer an improved rigidity, sturdiness and dimensional stability under heat compared to non-reinforced compounds.
H HCH
HOCO ...CC...
HH
346
www.bola.de
Trade names
Ultramid® by BASF Durethan® by Bayer Grilon® by Ems Chemie
n
Trade names
Plexiglas® by Evonik Röhm Perspex® by ICI
Oroglas® by Rohm and Haas
...S... n
Trade names
Fortron® by Celanese Ryton® by Phillips Petroleum Chemicals Alton® by Intern. Polymer Corp.