Nothing in the world is perfect, and the same is true in textile engineering. During spinning, defects arise in the raw yarn, such as neps (NeR) and slubs; during weaving, defects appear in the grey fabric, such as mispicks and broken ends; and during dyeing, defects appear in the finished fabric, such as dye spots and color differences at the end. High-quality finished fabrics should have very few defects.

Besides fabric surface defects (neps, neps) caused by the raw yarn and color differences, spots, and creases caused by dyeing, weaving defects are a key area for defect control. Weaving defects refer to fabric surface defects formed during the weaving process, directly affecting the fabric's appearance, evenness, and internal quality. The following is a systematic framework for analyzing weaving defects.

I. Classification and Characteristics of Weaving Defects:

Based on their formation mechanism, weaving defects can be divided into five dimensions:

1.Warp Defects: Longitudinal defects caused by warp problems or improper weaving operations. Common warp defects are as follows.

Amenorrhea

Morphology: Linear gaps formed by warp yarn breakage.

Causes: Insufficient warp strength, failure of stop warps, excessive warp friction.

Double warp/Thick warp/Thin warp

Appearance: A single warp yarn is significantly thicker/thinner than normal yarn.

Causes: Uneven yarn distribution during spinning, not effectively removed during warping; warp shrinkage/loosening.

Appearance: Uneven warp tension causing bubbling/wavy patterns on the fabric surface. Causes: Improper back beam adjustment, uneven warp beam winding, misaligned warp yarns.