__

extentinhalyardsandsheetsforracingboatswhichneedever
lightermaterialswhichdonotdeform.A ropemadeofthis

materialisfourtimesstrongerthansteelofthesameweight.

buttheuseofaramidropeisstilllimitedbecauseofitsvery

highcost.

Commercialnamesofthemainsyntheticfibers

Polypropylene(olefin)

Polyamide(nylon)

Polyester

Aramid

Meraklon

Perlon.Ulian.Enkalon

Dacron,Terylene,Targal.Terital,Trevira.

Oialan,Wislel

Kevlsr,Arenka

Comparisonbetweenfibers

usedinropemaking

• 
  


• c c•
  "

>.

>. Q. "0" ~

"'

(^0) ·E ;; "
Q. ;; a
" "
E >- >- >- >- E
"
"
:I: "0 "0 "0 "0 .;;:
"- "- "- "-
Specificgravity 1.48 0.95 0.91 1.14 1.38 1.
Meltingpoint 135'C 175'C 255'C 260'C
Breakingstrain
(grim')^90037645590012502600
Toughness 5+7.5 3+5 4+6 6+8 7.5+8.5^18
Stretching
orbreak% 1.5+415+35 20/30^1914 3.
Moistureregain%^120 0.4 4.5 0.5^6
14