Our shock cords are made with a core of rubber threads with an outside layer(s) of braided yarn. They vary tremendously in size and characteristics. Diameters range from under 1/16” to over 1”. The size is not the sole determining factor in the modulus (force required to stretch). The modulus of any size cord can be increased by packing the rubber tighter. Generally, the harder the cord, the greater the modulus. Varying the ratio of yarn to rubber also controls modulus. The braiding process allows for varying patterns of colors in the outside jacket. Most cords are white with a color “marker” but cords can be made with mixtures of colors in stripes, spirals or dashes. Larger cords come in a single or double cover. The double-covered is a premium cord with the inner cover usually made from cotton and the outer from a synthetic yarn. Many cords on the market are made from “transition” or other off-spec rubber. These are less costly and are adequate for many applications but lack the consistency needed for more demanding uses. Our cords utilize only prime rubber and thus offer a more uniform size and stretch. For specialty applications we can manufacture the cord with improved UV, fire, oil, sea water or abrasion (wet and dry) resistance. These are made to order and construction is dependent on properties and quantities required.
We also carry a variety of non-elastic cords.
Braiding produces an elastic which is generally heavier than knitted and will not "run". Unlike its woven counterpart, it does narrow when stretched, and is not as durable in its construction, however, it is available at a lower cost. Our flat elastic braids are made primarily from cotton or polyester, and are available in sizes ranging from 3/16" to 1" in width. Wider braid for belts, etc. (both elastic and non-elastic), is custom produced in widths up to 3" and greater. Black, White, and an assortment of colors are available. The yarn used for braiding will be determined by the requirements of the materials end use, as well as the issue of cost. Polyester is the least expensive. Cotton braids are softer, more absorbent, and are often preferred in premium applications such as swimwear. Cotton also can be dyed.
Knitting produces an elastic which is generally lightweight and inexpensive. It usually cannot be made as densely or as tightly as a woven web, but similar to the woven web, it will not narrow when streched. Our knit is made using polyester yarn and is available in widths ranging from 1/4" on up to 12", with black and white stocked, and various colors available with minimum yardage requirements. Call us about special configurations up to 20" wide.
Weaving is the premium method of elastic construction. It results in a finished webbing which does not narrow when stretched, and does not "run" when snagged. With woven webbing it is possible to create a much denser material, and/or a more complex interlocking of threads. Woven web can vary from lightweight insert type to mammoth heavy duty webbing. For hand, absorbency, and overall quality, cotton is the preferred fiber. Polyester is harsher and shinier, but less costly.
Specialty items offered for sale on-line include Gold and Silver Metallic stretch cords, a Flame-Resistant stretch cord and flat elastics that are Latex-free for those prone to allergies. Special orders can be made for Fold-over elastics and non-elastic trims such as Star Braid, Soutache, Tubular trims or Braids in 2-line, 3-line, etc., for special orders. See the entire on-line list of Specialty offerings and if what you want is not there, send us an email telling us the custom item you need.
These are special deals we are offering on overruns and cancelled orders, all are first quality products ready for immediate delivery!