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Weaving Factory Procurement Guide: 5 Core Tips to Identify Low-Quality Polyester Yarn (Pilling & Color Fading)
2026-03-27
5 Tips to Spot Low-Quality Polyester Yarn: Pilling & Fading
For procurement managers of weaving factories, the choice of raw materials directly determines the quality of the final fabric and customer satisfaction. In the textile industry chain, Polyester Yarn is widely used due to its high strength and low cost, but the market is flooded with a large number of low-quality products.
The most typical characteristics of low-quality Polyester Yarn arePilling and Color Fading. These problems are often discovered only after the fabric leaves the factory, leading the factory to face huge claims and reputation losses. From a technical perspective, this article provides you with a practical guide to identify low-quality Polyester Yarn, helping you keep risks out during the inspection process.
🔍 Tip 1: Observe Fiber Length and Surface Smoothness
The fundamental reason why low-quality Polyester Yarn is prone to pilling is its excessively shortStaple Length and excessive surface fuzz.
1. Fuzz Detection Method
Take a spool of Polyester Yarn and observe it against the light.High-quality polyester yarn has a smooth surface with very little fuzz. If the surface of the yarn is covered with fine fluff, it indicates insufficient drafting during the Spinning Process or excessive impurities in the raw materials. These fluffs are easily entangled during weaving and finishing, forming stubborn pills.
2. Strength Test
Although strength cannot be directly seen with the naked eye, it can be roughly judged by hand feel. Low-quality yarn usually has uneven strength and a dry hand feel. In the product category of [1], high-quality Polyester Yarn usually has the characteristic of "High Strength", which is the basis for ensuring no breakage and no pilling during weaving.
Procurement Suggestion: When the supplier sends samples, be sure to conduct a "dry friction" test to observe whether the surface of the yarn is easy to break and produce flyings.
🎨 Tip 2: In-Depth Analysis of Color Fastness (Solve Color Fading Problems)
Color fading is the most feared problem for weaving factories, especially when the fabric needs to go through high-temperature setting or washing processes. The dyes of low-quality Polyester Yarn will migrate quickly.
1. Selection of Dye Carriers
High-quality polyester yarn is usually dyed with disperse dyes under high temperature and pressure, or color masterbatch is added before spinning (Dope Dyeing). The Dope Dyedtechnology mentioned in [1] is the best solution to solve the color fading problem. If the supplier cannot provide dope Dyed Yarn, you need to focus on checking the color fastness level after dyeing.
2. Soap Washing Test
On-site quick identification method: Wipe the surface of the yarn firmly with a wet cloth. If the wet cloth is stained with color or the surface color of the yarn fades, it is definitely a low-quality product. Regular Polyester Yarn should reach a washing color fastness of above Grade 4 (ISO 105-C06 standard) before leaving the factory.
📊 Tip 3: Identify Tricks in Blending Ratio
Many weaving factories purchase blended yarn, such as TC (Polyester-Cotton) or TR (Polyester-Viscose). Low-quality suppliers often play tricks here.
1. Polyester-Cotton Ratio Trap
[1] details the differences between TC (Polyester-Cotton) and CVC (Cotton-Polyester). If you purchase 65/35 TC yarn, but the supplier reduces the polyester ratio to 50% to reduce costs, this will directly lead to poor dimensional stability of the fabric, making it prone to shrinkage and wrinkling.
2. Burning Identification Method (Simplified Version)
Although laboratory testing is the most accurate, procurement personnel can conduct preliminary screening through a simple burning method:
- Pure Polyester: Burns with black smoke, has a pungent chemical smell, and the ash is black hard lumps.
- Pure Cotton: Burns quickly, has a paper-burning smell, and the ash is gray soft powder.
- Low-Quality Blended Yarn: Unstable burning state, pungent smell, and more impurities in the ash.
🧪 Tip 4: Check Oil Content and Antistatic Performance
Low-quality polyester yarn often ignores the treatment ofSpin Finish. The spin finish is not only to reduce friction but also to resist static electricity.
In dry seasons or environments, if the surface oil of polyester yarn is insufficient, a lot of static electricity will be generated. This not only leads to serious "flyings" of the yarn during weaving but also absorbs dust in the air, making the fabric dull and dirty before leaving the factory. High-quality yarn suppliers (as shown in [1]) usually emphasize the "easy to wash and quick dry" and "wrinkle-resistant" properties of the yarn, which is inseparable from the scientific spin finish formula.
⚖️ Tip 5: Comprehensive Performance Comparison Table
To facilitate the procurement department to formulate acceptance standards, we have made the following comparison table based on the technical indicators of high-quality polyester yarn to help you quickly eliminate low-quality products.
| Testing Item | Characteristics of Low-Quality Polyester Yarn | Standards for High-Quality Polyester Yarn (Refer to [1]) |
|---|---|---|
| Pilling Grade | Grade 1-2, rough surface | Grade 3-4 or above, smooth surface |
| Color Fastness | Easy to fade when rubbed, fades when washed | Grade 4 or above, resistant to high-temperature setting |
| Strength CV% | Large difference, high breakage rate | Uniform strength, low breakage rate |
| Raw Material Composition | Lots of recycled materials, visible impurities | High-quality polyester chips, high purity |
| Main Uses | Low-end fillers, low-priced socks | High-end shirts, sportswear, industrial fabrics |
📈 Conclusion: Establish a High-Standard Procurement Firewall
The profit of a weaving factory comes from high efficiency and high quality, and all of this starts with raw materials. By testing the above five dimensions—observing fuzz, testing color fastness, checking blending ratio, and inspecting oil content—you have mastered the initiative in identifying low-quality polyester yarn.
In the Southeast Asian and global markets, customers have increasingly strict requirements for textiles. Choosing polyester yarn with "high strength, wrinkle resistance, easy washing and quick drying" characteristics as described in [1] is not only responsible for product quality but also an investment in the long-term development of the factory. Remember, do not sacrifice future orders for the current low price.
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