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| PS (Recycling-Code:
6) |
High-Impact polystyrene (designation
SB, i.e. HI-PS) is a mixture of glass-clear
standard polystyrene and Budatien rubber.
The butadien components cloud the foil opaquely.
Modification, however, makes the manufacture
of glass-clear types possible (e.g. styrolux
or K-resin). HI-PS possesses high individual
stability but becomes brittle from UV radiation.
The chemical resistance to oil/grease is low,
and this holds likewise for gas and steam
barriers. Many special materials (flocked,
electrically conductive, frosted) are deliverable.
To compensate for the poor barrier properties,
multi-layered foils like PS-EVOH-PE are implemented.
PS can be used in a temperature range of -
40° C to + 70° C. |
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