Français
3. Implementation
POMs can be processed on all the usual thermoplastics processing machines: injection presses, extruders, blow molding and compression molding equipment.
General precautions to be observed when using POMs are as follows:
the temperature of the molten polymer must not exceed 240 ˚C and, under no circumstances, must the polymer be subjected, for a relatively long time, to temperatures in excess of 220 ˚C. In the event of excessive thermal stress, POMs release formaldehyde gas, the presence of which, even in low concentrations, is indicated by an irritating odor ;
the maximum permissible concentration of formaldehyde in the air in workplaces, as recommended by INRS (Institut national de recherche et de sécurité), is 1 ppm (by volume);
in the event of improper...
The Ultimate Scientific and Technical Reference
This article is included in
Plastics and composites
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Implementation
Specific controls
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
Organizations
United states Pharmacopoeia (USP)
French National Institute for Research and Safety (INRS)
Drug Master Files, Food and Drug Administration (FDA)
The Ultimate Scientific and Technical Reference
