Water Absorbency

Definition and Overview

Water absorbency refers to the property of a textile to take in moisture. In addition to the fiber itself having the ability to absorb moisture, capillary action created by thread thickness, twist, weave structure, nap, and pile also affects how much water is absorbed and how it is drawn in.

Water absorbency is distinguished from moisture absorbency, which is the property of taking in sweat as water vapor. It is also not synonymous with quick-drying water absorbency, which is the property of dispersing and evaporating moisture easily after it is absorbed, and should be checked separately according to the application.

Features and Impact on Appearance

Fabrics containing cotton, rayon, linen, and similar materials generally tend to absorb moisture more readily. However, even with the same material name, performance varies depending on blend ratio, thread and weave structure, and after-finishing, so absorbency cannot be judged by material alone.

Fabrics that readily absorb moisture can help reduce the discomfort of sweat remaining on the skin, but when wet they may become heavier, appear darker in color, or feel less comfortable against the skin. Pile structures such as terry cloth are a representative structure that retains moisture easily.

Main Applications

Water absorbency is important in spring and summer clothing, underwear, nightwear, sportswear, and kids' clothing that are frequently exposed to sweat and moisture. In shirts and cut-and-sewn items, it is used when selecting fabrics that take into account stuffiness during wear and stickiness from sweat.

However, for high-activity applications, drying speed is also important in addition to absorbency. Fabrics that absorb sweat but dry slowly can cause chilliness and heaviness, so they are evaluated together with breathability, moisture permeability, and quick-drying performance.

• Applications for wiping moisture such as towels, handkerchiefs, and bathrobes
• Applications for absorbing sweat such as T-shirts, underwear, and shirts
• Applications with high perspiration such as sportswear and workwear

Selection and Handling Notes

When selecting a fabric, check not only whether it has absorbency, but also absorbency speed, dispersion, and drying performance according to the planned application. Assuming actual wear and washing, it is practical to also check how water droplets spread on the swatch, color change when wet, how it feels against the skin, and the texture after drying.

Fabrics containing natural fibers and regenerated fibers that absorb moisture easily may shrink during washing. Before cutting and sewing, if necessary, carry out boiling treatment or fabric straightening and check the shrinkage rate. When in a wet state, the fabric is more likely to stretch or change shape, so handle it without excessive pulling.

During sewing, also account for dimensional changes when moisture is absorbed, and cut with the grainline aligned. If product washing will be performed, it is important to confirm in advance through testing the shrinkage difference with sewing thread, interlining, and accessories, as well as whether color bleeding occurs.

Frequently Asked Questions