PROTECTION OF TELEPHONE CABLES FROM ATTACK BY INSECTS,
POSTMASTER-GENERAL'S DEPT MELBOURNE (AUSTRALIA) PHYSICS AND POLYMER GROUP
Pagination or Media Count:
As a result of the testing carried out in Australia over the past 15-20 years, an attempt was made to classify cable sheathing materials into four groups, as far as their resistance to insect attack is concerned a Fully resistant materials steel, brass, copper, aluminum, bronze, polycarbonate, acetals. b Highly resistant materials rigid P.V.C., high density polythene, nylon, PTFE, polyesters. c Moderately resistant materials lead, polypropylene, polyurethane, some natural rubbers, A.B.S. d Non-resistant materials low density polythene, plasticised PVC cellulose acetate butyrate, synthetic rubbers. No general solution for the protection of telephone cables from insects is yet in existence, but present knowledge is now far enough advanced to be able to specify cable sheathing materials which will stand an excellent change of resisting attack under the most hazardous conditions. The final selection will usually be a compromise between economic and performance factors, and hence a knowledge of the probability of attack in a given area is required, when such decisions are to be made.
- Electrical and Electronic Equipment
- Coatings, Colorants and Finishes
- Non-Radio Communications