Question

The common sewing thread is a

• A. Folded yarn
• B. Slub yarn
• C. Chenille yarn
• D. Seed yarn

Hint:

• Sewing thread} needs to be strong, smooth, even, and abrasion resistant.
• Folded yarn (Plied yarn) Formed by twisting two or more single yarns together. This structure enhances strength, evenness, and durability.
• Most common sewing threads (e.g., cotton, polyester staple spun, core-spun) are plied yarns (typically 2-ply or 3-ply).
• Slub, chenille, and seed yarns are novelty/fancy yarns used for fabric texture, not for functional sewing thread.

Answer 1

The Correct Option is A

Sewing thread is a specialized type of yarn designed to pass rapidly through a sewing machine needle and form stitches, joining fabric pieces together. It needs to have good strength, smoothness, elasticity, and abrasion resistance. Let's analyze the options:

• (a) Folded yarn (Plied yarn): A folded yarn (or plied yarn) is made by twisting together two or more single yarns. This plying process generally increases the strength, evenness, and abrasion resistance of the yarn compared to a single yarn of equivalent total fineness. Most common sewing threads are indeed plied yarns (e.g., 2-ply or 3-ply) to achieve the required strength and performance characteristics for sewing. For example, a common cotton sewing thread might be a 3-ply Z-twisted single yarns plied together with S-twist.
• (b) Slub yarn: A slub yarn is a novelty yarn characterized by thicker, softer sections (slubs) deliberately created at intervals along its length. Slub yarns are used for creating textured effects in fabrics, but their inherent unevenness in thickness and strength makes them unsuitable for general purpose sewing thread, which requires high consistency.
• (c) Chenille yarn: Chenille yarn has a pile-like or fuzzy surface, created by locking short cut pile fibers between two core yarns that are twisted together. It is a soft, bulky yarn used for decorative fabrics, furnishings, and some apparel, but not for sewing thread due to its structure and low strength for its bulk.
• (d) Seed yarn (or Knot yarn, Nub yarn): A novelty yarn containing small nubs, knots, or specks (seeds) of fiber or contrasting color at intervals. Like slub yarn, it's used for decorative texture in fabrics and is not suitable for sewing thread due to its irregularity.

The common sewing thread used for most applications is a folded yarn (plied yarn), typically 2-ply or 3-ply. This structure provides the necessary strength, smoothness, and consistency for sewing operations. Sewing threads can be made from cotton, polyester, nylon, silk, etc., but the plied structure is a common characteristic. \[ \boxed{\text{Folded yarn}} \]