Inlay

Definition and Overview

Inlay refers to a knitting method in which an insertion yarn is held along the course direction of the knitted fabric without being knitted into the ground yarn that forms the loops, or to the resulting knitted fabric. Because the insertion yarn does not form ordinary loops, the structure looks different on the face and back sides.

The appearance and properties of inlay vary greatly depending on how the insertion yarn is introduced, the yarn thickness, the ground structure, and the specifications of the knitting machine. For this reason, inlay is treated not as a fabric name indicating a single texture, but as a term describing a structural characteristic.

Characteristics

A key characteristic is that the insertion yarn makes the knitted fabric feel thicker, firmer, and denser. Compared with ordinary jersey, it tends to have less stretch in the horizontal direction and to hold its shape better.

The appearance ranges from a relatively flat surface to styles in which the insertion yarn is visible on the back side. Depending on the yarn arrangement, it can also create a substantial casual look or a sense of stability similar to woven fabric.

Absorbency, warmth, and stretch do not depend on the inlay structure alone. It is necessary to check these together with the fibers used, knitting density, fabric weight, and any brushed or resin finishes.

Main Applications

With its moderate thickness and stability, it is used for sweatshirts, hoodies, cut-and-sew tops, pants, skirts, and more. Depending on the yarn arrangement and thickness, it can be developed from lightweight spring/summer items to warmer products intended for autumn/winter.

It is suitable for casual wear where excessive stretch should be suppressed, and for items that need to maintain a three-dimensional silhouette. However, if the knitted fabric has low stretch, it is important to compensate for ease of putting on and taking off, as well as movement, through pattern design.

Selection and Handling Notes

When selecting it, check the appearance of the face and back, thickness, fabric weight, stretch in the horizontal and vertical directions, and rebound. Determine whether it has the stretch required for the application by test sewing it in the same direction as the final product. In particular, pay attention to the difference in stretch with accessories such as rib knit.

After cutting or washing, the knitted fabric may shrink, twist, or change dimensions. Before mass production, confirm shrinkage using the roll and, if necessary, condition it by hot-water treatment and similar processes. Manage washing methods according to the blend ratio and processing details, and follow the care label.

During sewing, seams may wave in the direction that stretches easily, or dimensional differences may occur due to feeding. Match differential feed, presser foot pressure, and the needle and thread combination to the textile, and check seam stretch and puckering through test sewing.

Differences from Similar Terms

Jersey is a basic plain-knit structure, while inlay is a structure in which insertion yarn is added to that ground structure. Inlay may be based on jersey, but it is not synonymous with jersey itself.

French terry is a knitted fabric that forms loops on the back side, and brushed back is a fabric in which those loops and similar structures are brushed. In contrast, inlay is based on holding insertion yarn, and whether loops exist on the back side is a separate specification.

Plating is a technique in which multiple yarns are knitted into the same loop and used differently on the face and back sides. In inlay, the main difference is that the insertion yarn does not form ordinary loops.

Frequently Asked Questions