What are the most fruitful knots on stiff polypropylene ropes?
...
For loops I had some success with the Angler's loop and for bends with the Double Fisherman.
For an eye knot, the
Mirrored BWL is designed for
such difficult material --stiff, unbending kernmantle;
springy, bending-but-eager-to-spring-free, and slick,
and sometimes hard (read : limited contact patch) PP.
The
Mirrored BWL isn't a knot that is set snug-tight,
just well-formed and close,
and its conglomeration of parts upon parts serves
well to arrest further loosening.
(( I should remark that once I got some 3mm? soft-laid
PP cord from someone who was quite frustrated trying
to use it (so, ha, Send It To Dan!). I struggled (with
only 2 hands, and a mouth) to set the End-Bound Dbl.BWL
snug; but at last I succeeded. Victorious, I looked at the
knot and thought to it "Let that learn ya!"; then, after
perhaps 30 seconds?, the knots loop-binding-loops
all just relaxedly opened into looseness !!! HUH ??
The photo'd knots mostly all have their "back-door"
states with a HARD bend in the Outgoing Eye Leg;
this isn't so keen to expand but wants to scissor-like
open, and that's easily impeded by surrounding parts;
though for the stiff rope, a hard such bend isn't going
to work, and thus (2nd from left) I found the version
making a softer bend for that. ))
Now, for a set-tight knot,
use a
Locktight EK.
https://forum.igkt.net//index.php?action=dlattach;topic=3888.0;attach=7199;image
The main variations I like are
the 2nd-from-RIGHT one (for the springy PP),
and the 2nd-from-Left one (for unbending rope
--note that the outgoing eye leg isn't bent quite
so hard.
The design goal was simple :: get strangle-knot-like
security, but with a BWL-like opening "back door"
so it can be untied.
--dl*
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ps : Sorry, but I'm in time pressure,
and so don't cannot here now give a nice
verbal description.