Wire Tape
Wire tape is a narrow tape sewn onto the lower edge of the cup in bras and similar garments, used to pass the underwire through and keep it in place while supporting the bust.
Contents6 sections
Definition and Overview
Wire tape is a narrow tape-like material with a pouch-like or channel-like structure for holding an underwire. It is sewn along the curve on the inside of the body or cup to prevent the wire from shifting or popping out. It is also called channeling tape.
Wire tape itself is not a shaping interlining for forming the bust; it is a component that holds the bra wire in place. The cup’s three-dimensional shape and support are designed by combining the wire shape, cup, power net, and other materials.
Placement and Function
It is mainly used in bras, bra tops, bustiers, and corsets along the underwire line at the lower edge of the cup. After inserting the wire into the tape, both ends are stitched closed to prevent movement during wear.
Because the tape is placed between the wire and the skin side, it also helps prevent the wire ends from damaging the outer fabric or lining. However, skin feel is not determined by the tape alone; it also depends on seam finishing and end treatment.
Materials and Types
Woven, knitted, and brushed materials made of polyester or nylon are used. Considering abrasion resistance, thickness, flexibility, and skin feel, they are made with an inner shape suitable for inserting and removing the wire.
Types include those made by folding a flat tape in half to form a pouch during sewing, and those preformed into a tube. Smooth-surfaced types make it easier to pass the wire through, while brushed types tend to soften contact against the skin side.
- Inner dimensions matched to the wire width and thickness
- Flexibility that conforms to the curve of the lower edge of the cup
- Surface feel and seam thickness when used on the skin side
- Durability against washing and wear friction
Selection and Sewing Notes
When selecting, check whether the tape’s inner dimensions and stiffness are appropriate for the width, thickness, overall length, and curve of the bra wire to be used. If it is too narrow, inserting the wire becomes difficult; if it is too wide, the wire may move inside and the position may not stay stable.
During sewing, align the tape and cup evenly without stretching or pulling the curve of the wire line. If the stitching extends to the inside, it can make wire insertion difficult and affect skin feel, so confirm the pass-through and comfort during prototyping.
After inserting the wire, secure both ends firmly so the ends do not directly touch the skin. It is important to assume wire rotation after washing, protrusion of the ends, and tape wear, and to repeatedly check wear and washing resistance before mass production.
Differences from Similar Terms
A bra wire is a metal or resin component that supports the lower part of the cup and helps shape it. Wire tape, on the other hand, is the tape that the wire passes through and is held in place by, so the two differ in both purpose and structure.
Wire ribbon often refers to decorative ribbon with a shape-retaining wire inserted along the edge, and is a different material from the passage cloth for bust wires. Also, ordinary bias tape and piping cannot be substituted if they do not have a pouch section for holding the wire.
Frequently Asked Questions
How much larger than the bra wire should wire tape be?
Choose an inner dimension that allows the wire width and thickness to pass through smoothly without excessive play inside. The appropriate allowance varies depending on the tape structure and the wire surface finish, so confirm insertability, conformity to the curve, and slippage during wear by making prototypes with the actual item.
Can wire tape be used for bras without wire?
It is not essential in a wire-free design. However, it may be used when a decorative seam or reinforcement is needed along the lower edge of the cup. Support without wire is designed separately using elastic band, power net, tape, cup structure, and other components.
What causes the wire to pop out?
Causes include insufficient end stitching, wear of the tape, an improper size match between the wire and the passage section, and damage to the stitching. Protect the wire ends and secure them firmly with stitch securing, and confirm durability around the ends through wear testing that includes after washing.
