Page 34 - Randy Penn Everything Knots Book

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ALL ABOUT ROPES AND TWINE

stronger by weight than natural fiber ropes. They are both very sen-
sitive to heat, with polyethylene being quite flammable. Both must
be protected from prolonged exposure to sunlight, and both are
used in inexpensive general utility ropes.

FACT

Because synthetic cordage materials are more slippery than
natural fiber, you must put more thought into choosing the
right knot for a particular job and spend more time testing the
knot for security. Some long-trusted knots like the Bowline can
slip when tied with particular kinds of synthetic rope (synthetic
ropes vary greatly in their knot holding, so each case may be
different). To be sure your rope will hold, you need to try
knotting with different types of synthetic ropes.

Other Options
Many other synthetic materials are in use and continue to be
developed. High-performance fiber ropes, such as Kevlar and
Spectra, are stronger per weight than steel. These and other vari-
eties of high-modulus fibers, though more expensive, offer unique
properties for special applications. Detailed information about these
new offerings can be obtained from the manufacturers.
Many activities use a very narrow range of rope materials, and
you should refer to information sources on those applications to
determine what is used. All the properties of rope materials affect
the suitability of ropes for given applications, and with a little
knowledge you will be able to take them into account for your
cordage needs.

Choosing the Right Rope

When it comes to most activities that require the making of knots,
whether it is in sailing or decorative arts or another area, it is helpful

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