SOME CONSIDERATIONS ON THE USE OF HIGH DENSITY POLYTHENE IN THE CABLE INDUSTRY,
IMPERIAL CHEMICAL INDUSTRIES LTD WELLWYN GARDEN CITY (ENGLAND) PLASTICS DIV
Pagination or Media Count:
The physical properties of high density polythenes make these materials immediately attractive to the cable manufacturer. Their improved mechanical properties, abrasion resistance, and resistance to deformation at high temperatures should enable the cable designer to cut the cost of most cables, either by a reduction in raw material usage or by increasing the rating for a given size of cable. This assumes that the price of high density polythenes will not be significantly higher than conventional polythene once they are in full scale production. The data available on the properties of these new plythenes is still very meagre and does not permit a clear assessment of their potentialities to be made. The short term accelerated tests reported here, indicate that in some of the fundamental properties high density polythenes are inferior to the conventional material. The tendency of high density polythenes to be brittle, as shown by their low elongation at break at high rates of strain and the high notch sensitivity at low temperatures, may well restrict their use. The embrittlement at high temperatures when under stress, and the oxidation characteristics, are not at present fully understood, and they raise queries as to the service life which can be expected from the new materials.
- Electrical and Electronic Equipment
- Miscellaneous Materials