Biological resistance
The term biological resistance describes the extent to which polymeric materials can be broken down by biological microorganisms such as bacteria , algae or fungi .
Microorganisms can accumulate and multiply. However, plastics cannot only be used as a source of food by the microorganisms . Materials and surfaces can also be changed by metabolic products of the microorganisms (e.g. discoloration). On the one hand, this affects the service life of the materials and, on the other hand, it can cause uncontrolled microorganisms to reach critical areas. Especially in the pharmaceutical industry , food industry or medical technology , this microorganism growth is a source of danger for the end product. Here the metabolism of plastics is a quality-determining factor and can be tested according to DIN EN ISO 846.
credentials
- ↑ Müller W .: Manual of PE-HD geomembrane in geotechnical engineering , Birkhäuser, 2001, p. 85, ISBN 3764365048 , here online .
- ↑ Ehrenstein GW, ea: The resistance of plastics , Hanser Verlag, 2007, p. 219, ISBN 3446218513 , here online .
Web links
- Hazards from carbon-reinforced plastics (CFRP) (accessed December 9, 2019)