Cotton

Definition and Overview

Cotton is a natural fiber of plant origin harvested from cotton plants. It is often used as spun yarn made by twisting short fibers together, and in woven fabrics it is used for warp and weft yarns, while in knits it is used as knitting yarn. In addition to being used on its own, it is also used in blends and union fabrics with polyester, linen, and other materials.

Depending on yarn thickness, twist strength, weave or knit structure, density, and finishing, the appearance and performance of cotton can vary greatly, from thin lawn to thick canvas, jersey, and fleece. It is important to check the overall fabric design, not just the material name.

Characteristics

Cotton is generally absorbent and readily absorbs sweat and moisture, making it suitable for clothing that touches the skin. It offers a wide range of textures, from smooth surfaces to soft fuzzy finishes, and is also used for dyeing and printing.

On the other hand, it tends to dry slowly when it contains moisture. It may also shrink, wrinkle, or experience color fading or color transfer due to washing. Since its properties vary depending on processing, fabric density, dyeing method, and blend ratio, check test results and care labels.

• Its absorbency makes it suitable for shirts, cut-and-sew fabrics, towel fabrics, and similar items.
• It is compatible with both woven fabrics and knits, offering a wide range of expression through structure and finishing.
• It may offer the matte appearance typical of natural fibers and the changing texture that comes with long use.

Main Applications

Thin to medium-weight cotton materials are used for shirts, blouses, T-shirts, underwear, dresses, children's clothing, nightwear, and more. They are often selected for spring and summer products that require breathability and a comfortable feel against the skin, while knits, fuzzy finishes, and layering also make them suitable for year-round and autumn/winter use.

High-density or thick cotton materials are suitable for pants, jackets, workwear, denim, bags, hats, aprons, covers, and more. Durability and shape retention are determined by the fabric structure, yarn thickness, and density.

Selection and Handling Notes

Choose the weave or knit, industry weight, thickness, density, stretch, and sheerness according to the intended use. For shirts, choose structures such as thin to medium plain weaves or poplin; for cut-and-sew garments, choose jersey or circular rib; and for bags, choose canvas, selecting the structure according to the required form and strength.

Before cutting and sewing, perform washing tests and straightening under the same conditions as mass production, and check shrinkage and skew. In particular, for products intended for water washing, differences in shrinkage between warp and weft can affect dimensions and patterns. For dark colors, color fastness to rubbing and color transfer during washing must also be checked.

In sewing, select needles, thread, and stitch types suitable for the thickness and density of the fabric. For thin fabrics, pay attention to needle holes and seam puckering; for thick fabrics, be careful of needle breakage and poor sewing at stepped areas. Evaluate the seam appearance and post-wash condition through samples that include sewing specifications and secondary materials.

Differences from Similar Terms

Organic cotton is a term for cotton that focuses on cultivation and processing management methods, and it is distinguished from the fiber name cotton itself. Even in organic cotton, texture, strength, and shrinkage vary depending on yarn and fabric design and processing.

Linen is also a natural fiber of plant origin, but its raw material plant and fiber characteristics differ. In general, linen tends to show more firmness and slubs than cotton, while cotton is used in a wider range of structures and finishes. In blends with polyester, the aim may be to improve drying speed and resistance to wrinkling.

Frequently Asked Questions

Does 100% cotton fabric always shrink?

100% cotton fabric may shrink during washing, but the degree of shrinkage varies depending on the yarn, fabric structure, density, dyeing and finishing, and whether shrink-resist processing has been applied. Before productization, it is important to test under the same washing conditions as mass production and reflect the shrinkage rate in the pattern and specifications.

What is the difference between cotton and polyester blends?

When cotton and polyester are blended, it may be possible to maintain cotton's absorbency and natural texture while adjusting drying performance, resistance to wrinkling, strength, and other qualities. However, performance changes depending on the blend ratio, structure, and processing, so do not judge the application based on the material name alone; check fabric swatches and test results.