In the carpet industry, yarn count, ply count, and Tex are frequently mentioned core technical indicators. These three indicators directly determine the yarn's fineness, strength, and feel, thus affecting the carpet's appearance, texture, abrasion resistance, applicable scenarios, and production costs.
I. Yarn Count
Yarn count is an indicator of yarn fineness, reflecting fiber fineness and processing technology. It is expressed in metric (Nm) and imperial (Ne) units. The Chinese carpet industry uses metric count more commonly, while imperial count is more prevalent in European and American markets.
1. Metric Yarn Count (Nm): The Mainstream Standard in China
Definition: The length (in meters) of yarn per gram of weight at standard moisture regain. In simple terms, "for a fixed weight, the longer the length, the higher the yarn count, and the finer the yarn."
Calculation Formula: Nm = Yarn Length (meters) / Yarn Weight (grams)
Carpet Application Scenarios: Fine yarns are commonly used in high-end carpet production, such as Axminster and Wilton carpets. Fine yarns can weave more delicate patterns, resulting in a softer feel and a higher-quality texture. Coarse yarns are suitable for construction applications, such as commercial wall-to-wall carpets. The structure of coarse yarns makes the carpet more wear-resistant, less prone to crumbling, and able to withstand high-frequency foot traffic.
2. Imperial Yarn Count (Ne): A commonly used standard in European and American markets.
Definition: Under standard moisture regain, the number of multiples of 840 yards (1 yard = 0.9144 meters) of yarn contained in 1 pound (approximately 453.6 grams). Consistent with the metric yarn count rule, the higher the number, the finer the yarn.
Calculation Formula: Ne = (Yarn Length / 840 yards) / Yarn Weight (lbs)
II. Ply Count
Ply count indicates the structural composition of the yarn, how many single yarns are plied together to form a single yarn. The ply count directly affects the yarn's strength, abrasion resistance, and hand feel.
A higher ply count results in stronger, thicker, and more abrasion-resistant yarn; however, the yarn will be more compact, resulting in a relatively rougher feel, and the woven carpet will have a stronger three-dimensional pile.
A lower ply count results in a softer, fluffier yarn feel, making the carpet more comfortable; however, it has lower strength and is more prone to fiber breakage and pilling over long-term use.
Difference between Single Yarn and Ply Yarn
Single Yarn: A single yarn spun directly from fibers, labeled "1/", such as "1/Nm 30". The advantage of single yarn is its soft feel, which makes the carpet pile fluffier, but its strength is relatively lower and its abrasion resistance is weaker.
Ply yarn: Yarn made by twisting two or more single yarns together. 2-ply and 3-ply yarns are more frequently used in carpet industry, while 4-ply and higher used in some high-strength applications. The core advantages of plied yarn are high strength and abrasion resistance, but its feel becomes stiffer with increasing ply count.
III. Tex
Tex is a yarn fineness index established by the International Organization for Standardization (ISO). It belongs to the "fixed length system" (weight measured at a fixed length) and is a core labeling standard for carpet exports to Europe and America.
Definition: The weight (in grams) of 1000 meters of yarn at standard moisture regain. In simple terms, "for a fixed length, the heavier the weight, the higher the Tex value, and the coarser the yarn," in stark contrast to the "higher the count, the finer the yarn" principle of yarn count.
Calculation formula: Tex = Yarn weight (grams) / Yarn length (kilometers)
