Square Braid

Definition and Overview

Square braid is a type of braided cord made by interlacing multiple yarns. Unlike a round cord, it is characterized by an angular cross-section and visible ridges. It is also called square braid cord or square cord.

Here, “braid” refers to the process of interlacing yarns into a cord, or to the cord made in that way. However, the way square braid is named and how angular its cross-section is can vary depending on the production area, application, and manufacturer.

Materials and Structure

Square braid does not have a structure in which warp and weft are set at right angles like woven fabric; instead, it is made by crossing bundles of yarn diagonally. The surface shows diagonal lines created by the crossing yarns, and the firmness, luster, and feel change depending on the density and yarn thickness.

Materials used include cotton, polyester, nylon, rayon, and silk. Natural fibers can give a material-like texture, while synthetic fibers may be used for applications that require strength and weather resistance. In addition to the material itself, whether it has a core also affects shape retention.

How Thickness Is Expressed

Square braid specifications are generally shown not by cord width, but by a dimension close to the length of one side of the cross-section or by thickness. However, because the values vary depending on the fullness of the braid and the measuring position, confirm the cross-section, firmness, and crush resistance with an actual sample, not just the stated dimensions.

When calculating the required length, allow for loss from knots, folds, and end finishing. In particular, when used for tying or decorative knots, the amount used increases compared with the length measured in a straight line, so it is important to make a sample and determine the required yardage.

• Thickness or cross-sectional dimension
• Whether it has a core or is hollow
• Braiding density and surface appearance
• Required tensile strength and ease of tying

Main Applications and How to Choose

In apparel, it is used for hood and waist cords, decorative knots, loops, and Japanese-style design details. For bags and small accessories, it is used as a drawstring, handle reinforcement, or decorative cord. Its angular shape is suitable when a more three-dimensional look is desired than with a flat tape.

When selecting it, check the thickness relative to the inner diameter of the eyelet or cord stopper, the size of the knot, and how firm it feels against the skin. For pull-and-tighten applications, also evaluate slipperiness, how well knots stay tied, and fuzzing with repeated use.

Handling and Differences from Similar Terms

Braided cords may loosen and unravel from cut ends. Finish the ends in a way suited to the material, such as stitching them closed, heat treating them, or covering them with hardware or cord ends. Heat treatment is limited to synthetic fibers, and you need to check how they melt and whether discoloration occurs.

Stretching, shrinkage, and color fading from washing vary depending on the material and finish. Before sewing it on, perform a wash test to check for shrinkage differences with the main product and for color transfer. Snagging and strong friction can lead to surface fuzzing and irregular braiding.

Round cord is a cord with a round cross-section, and flat cord is a flat cord with width. Edo braid is one of the terms used to describe the braiding method and appearance, and like square braid it is classified as a braided cord, but the cross-sectional shape and structure are not necessarily the same.

Frequently Asked Questions