Strand Count
Strand count is a term used to indicate the number of yarn bundles or carriers on a braiding machine used when making braided cord or cord, and is one measure of the fineness and appearance of the braid.
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Definition and Overview
Strand count is a structural indication mainly used for braided cords such as kumihimo and Edo braid. In general, it refers to the number of yarn bundles participating in the braid, or the number of carriers that hold and move the yarn, and is expressed as 8-strand, 16-strand, and so on.
Strand count is not a numerical value that directly indicates the density of warp and weft in woven fabrics or the thickness of yarn. Even with the same strand count, the finished cord’s thickness and firmness vary depending on yarn thickness, material, twist, and braiding method.
Material and Structure
Because braid is made by crossing multiple yarn bundles, its structure differs from that of woven fabrics, which interlace warp and weft at right angles. There are round braid constructions that tend to have a round cross-section, and flat braid constructions that have a flat cross-section; strand count is checked together with the braid structure.
As the strand count increases, the braid pattern may appear finer when using yarn of similar thickness. However, density, strength, and flexibility cannot be judged by strand count alone; the braiding method and yarn specifications have a major effect.
How to Read Thickness and Labeling
Cord thickness is generally checked by diameter, width, or folded diameter. Since strand count is not a unit of thickness, it is important in ordering and specifications to state the finished diameter or width, material, color, and, if necessary, stretch and strength requirements in addition to strand count.
Even with the same name, the way strand count is counted and described may differ depending on the manufacturing method and manufacturer. When replacing an existing item, do not match only the strand count; compare the cross-section, braid pattern, hand feel, and changes under tension using an actual sample.
- Round cords are labeled with both diameter and strand count.
- Flat cords are checked for width, thickness, and strand count.
- For cords with a core, check the outer braid structure and the presence or absence of the core material separately.
Main Applications and Selection
Braided cords with a strand count are used for garment waist and hood drawstrings, bag closure cords, decorative cords, and more. Depending on the application, confirm the appearance of the braid, ease of tying, compatibility with accessories such as cord stoppers, and the durability required.
Stretching or shrinking due to washing, moisture, or heat is affected more by the material and finishing than by strand count. Cut ends may unravel, so check whether heat cutting is possible for each material, and use a suitable end finish for the application, such as sewing in, end fittings, or tying off.
Differences from Similar Terms
Braid manufacturing refers to the production of cords or braids, or to such products in general. Strand count, by contrast, is one of the indications used to show the structure of braided cords or braids. Some braid products are twisted cords, and not all cords are labeled with strand count.
Edo braid is a term referring to a type of braid or its braiding method. Products described as Edo braid may also show strand count, but Edo braid itself does not mean strand count. Twisted cord has a structure made by twisting yarns together, and is distinguished from cords made by braiding.
Frequently Asked Questions
Does a higher strand count make the cord thicker?
Not necessarily. Strand count indicates the number of yarn bundles or carriers used in the braid, and the finished thickness depends on yarn thickness, braiding method, tightness, and whether or not there is a core. When specifying thickness, check the diameter or width separately from the strand count.
Can I choose the same cord based on strand count alone?
It is difficult to determine an equivalent product based on strand count alone. Even with the same strand count, appearance, firmness, stretch, and ease of tying change depending on the material, braiding method, number and thickness of yarns, and finishing. Before replacement or mass production, it is important to confirm the thickness and feel with an actual sample.
How can I prevent the ends of braided cord from fraying?
Choose the end finish according to the cord material and application. Heat cutting may be possible with materials that melt under heat, but it is not suitable for natural fibers. Select a method such as sewing in, tying off, or attaching an end fitting, and test whether it will pull out during washing or under tension.
