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Jacques DESBONNET: Chemical engineer HEI - Automotive Development Manager, Ticona France
INTRODUCTION
The launch of polyacetals in the early 1960s marked the arrival in design offices of the first technical polymer to replace metals in parts with mechanical functions. Indeed, the properties of rigidity, surface hardness and long-term mechanical resistance, as well as the spring effect and very low coefficient of friction, enabled the development of self-lubricated axles, bearings and pinions, with considerable reductions in manufacturing and maintenance costs. As a result, plastics were able to shed their pejorative connotation of low-quality products and take their place in the market.
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Polyacetals: polyoxymethylenes (POM)
POM manufacturing
Bibliography
Standardization
The Afnor catalog can be consulted online: http://www.afnor.fr
- Plastics – Thermomechanical Analysis (TMA) – Part 1: General principles - ISO 11359-1 - 10-99
- Plastics – Thermomechanical Analysis (TMA) – Part 2: Determination of linear thermal coefficient and glass transition temperature - ISO 11359-2 - 10-99
- Plastics –...
Polyacetal producers
Both homopolymers and copolymers are relatively difficult to produce, and have been for a long time. DuPont and Celanese were the only two producers. Numerous new plants have sprung up in the Far East.
Only DuPont and Asahi offer homopolymers. All other producers offer copolymers. Total worldwide capacity is around 780 kt (table 3...
Organizations
United states Pharmacopoeia (USP)
French National Institute for Research and Safety (INRS)
Drug Master Files, Food and Drug Administration (FDA)
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