textile products that contain strands of rubber, either synthetic or
Shock Cord consists of a braided jacket of a textile fiber such as
nylon, polypropylene or polyester. This braided jacket is tightly
braided over a core of rubber. When the shock cord is stretched, the
braided jacket actually flexes and actually compresses the rubber fibers
in the core, so not only does the rubber core stretch, it is also
compresses laterally as the braided jacket constricts around it.
Natural rubber is found in most common shock cord and nylon is one of
the more common fibers for the braided jacket. Polypropylene is used in
less expensive shock cord and has a tendency to develop breaks and holes
in the braided jacket, due to the fact that polypropylene does not have
the tensile strength or abrasion resistance that nylon has.
Most shock cord stretches from 50% to 80% of it's original,
Tendo-Tex is the leading brand of American Made Shock Cord and is considered a High
Performance Shock cord, being able to stretch 108% of it's original
length without damage.
Shock cord, showing multifilament rubber fiber core, and braided
Tendo-Tex Shock Cord is available in 8 sizes
Cord-Lock for 3/32" & 1/8" shock cord
Elastic Webbing is similar to shock cord in operating principle, but it
is a woven or knitted textile product that has a flat or linear
construction. There are two main varieties of Elastic Webbing, Knitted
and Woven. Knitted Elastic has a distinctive ribbing that runs
lengthwise along the material. Whereas woven elastic webbing has a
smoother appearence with a weave that produces a diagonal pattern
that is less pronounced than the ribbing in the knitted elastic. The
edges of Woven elastic are also noticably thinner than the center of the
material. This thin edge is usually 1/16'' to 1/8'' wide on both sides
of the material.
Woven Elastic - notice thin edges
Knitted Elastic - notice ribbing that runs length of material
There is not much difference in durability or strength between woven and
knitted elastic webbing, however smaller widths of elastic are more
likely to be knitted, and wider widths, wider than 3/4'' are typically
woven instead of knitted.
Elastic is commonly used to
that need to stretch or have a tension to accomodate an
object that typically changes sizes and/or flexes frequentl, where a
strap of a fixed size would become too tight ot too lose in the course
of the movement or flux. Elastic is often used in conjuction with
visit our other informational site:
for more details on types of webbing
hardware and buckles for webbing straps. Also take a look at
for information about the different types of webbing material.