Pile Height

Definition and Overview

Pile height refers to the length of the raised fibers formed on the surface of a textile. In pile fabrics, it means the length of loops or cut pile; in brushed textiles, it may refer to the length of the fiber layer raised by brushing the surface.

Pile height is not the name of a fabric structure, but a property that indicates surface appearance. Even in the same pile or brushed material, the appearance and hand feel of the pile height vary greatly depending on the raw material, density, nap direction, and finishing.

Effect on Hand and Function

In general, the longer the pile height, the easier it is to create loft, softness, and a three-dimensional look, and variations in shade become more visible depending on the light and the direction of the nap. Because it tends to trap air between fibers, it can also contribute to warmth.

Textiles with a short pile height tend to look relatively neat on the surface, and changes in the nap are less noticeable. Do not judge absorbency or warmth only by pile length; also check the material, density, base structure, and finish.

Main Applications

Short-pile fabrics are used for towel fabrics, cut-and-sew items, roomwear, and similar products. Depending on thickness and material composition, some are easy to use throughout the year.

Long-pile fabrics are used for boa fleece, faux fur, shaggy-style textiles, and outerwear or miscellaneous goods that make use of a brushed look. They are easy to give a voluminous appearance and are often chosen for autumn and winter collections.

Selection and Handling Notes

When planning, check not only the measured pile height but also density, shedding, nap direction, and thickness after cutting using swatches. With long pile, the appearance may vary like a color difference depending on the direction, and the look may differ from area to area.

During cutting, align the nap direction and keep the cutting direction consistent within the same product. During sewing, the pile can easily get caught in the seam allowance, so care is needed, such as sewing while keeping the pile away. Textiles with pile tend to have thicker seam allowances, so consider the finishing method according to the specification.

Washing and drying may disturb the nap or cause the fibers to tangle. Depending on the material and processing, shrinkage or changes in hand may also occur. Follow the care label instructions, and before mass production, conduct washing tests and appearance checks in the finished product state.

Differences from Similar Terms

Pile refers to a structure or the fabric itself with loops or cut pile formed on the surface. By contrast, pile height is an expression of the state or dimension of the raised portion, including the pile.

Brushed refers to a process in which the fibers on the textile surface are raised by brushing. The length of the raised fibers created by brushing may be called pile height, but pile height itself is not the name of a process. Nap refers to the fine fibers that appear on the yarn or textile surface, and is a term that describes a finer surface condition than pile height.

Frequently Asked Questions