How to choose polypropylene colored yarn? Before purchasing, make sure to clarify these two issues first. 

polypropylene colored yarn (PP colored yarn) is widely used in areas such as luggage straps, outdoor products, and clothing accessories due to its rich colors, low density, resistance to acids and alkalis, and good wear resistance. Many buyers often encounter confusion when selecting the type: for the same colored yarn, why are there significant color differences in some batches? And why do some batches have more broken ends when used? Let's address two common issues below to help you clarify your thinking. 

1. Color stability: How can different batches maintain consistency? 

The polypropylene colored yarn is produced using the direct dyeing process. The color is achieved during the spinning stage by adding color pigments, rather than through post-dyeing. This method results in more durable and water-resistant colors, but it requires higher control over color variations between batches. 

Batch consistency of color masterbatch: The color stability of the colored yarn primarily depends on the color masterbatch. Whether the supplier uses the same brand and the same batch of color masterbatch, or pre-mixes different batches of masterbatches, is the key factor affecting color differences. During the procurement process, you can ask the supplier how they control the batch fluctuations of the color masterbatch. 

Spinning process stability: Changes in process parameters such as spinning temperature, screw rotation speed, and cooling conditions can also affect the color and luster of the colored yarn. Whether the supplier takes samples from the winding plate at regular intervals during the production process and compares them with the reference samples under standard lighting conditions is a reference for evaluating their color control capability. 

Sample retention and comparison system: Reliable suppliers will retain the winding board samples and color plates of each batch of colored yarn. Before the next batch of production, they will compare them with the samples from the previous batch. During the procurement process, you can request to review the color plate comparison situations of multiple recent batches. 

It should be noted that the color difference control for dark colors (such as black and navy blue) and light colors (such as beige and light gray) is of different difficulty levels. Light colors are more sensitive to the fluctuations of the masterbatch, and the differences between batches are more easily noticeable. Therefore, when purchasing, it is advisable to set higher requirements for the batch consistency of light-colored yarns. 

II. Spinnability and Breakage Rate: Key Factors Affecting Weaving Efficiency 

Whether the colored yarn has any breaks or excessive fuzz during the weaving or knitting process directly affects your production efficiency. 

Yarn uniformity: The uniformity of the fineness of the colored yarn is a core indicator affecting the processability. If there is uneven thickness in the same batch, the thinner sections are more prone to breakage during weaving. Whether the supplier has the ability for online fineness monitoring or regular sampling inspections is a reference for evaluating their quality control level. 

Oil treatment and anti-static properties: During the production process of polypropylene colored yarn, an oil agent is added to reduce friction and minimize static electricity. The appropriate amount and uniformity of the oil agent content will affect the smoothness of yarn unwinding on the loom and the amount of lint produced. Insufficient oil agent can easily cause static electricity and lint, while excessive oil agent may contaminate the loom. 

Breakage rate test: Before purchasing, it is recommended to request samples. Conduct a small-scale trial weaving on your own loom or circular loom to observe the breakage frequency and the presence of fuzz. This is a relatively direct way to test the spinnability of the color yarn. 

Summary and Selection Suggestions 

When purchasing polypropylene colored yarn, it is recommended to follow the steps below for confirmation: 

Let's start with color matching: Provide a physical color chart or Pantone numbers, and require the supplier to send back samples of recently produced rolls for comparison. For light or sensitive colors, it is possible to request the provision of color charts for three consecutive batches. 

Re-test for processability: Request the sample to be put through a weaving test on the machine, and observe the breakage rate, the amount of fuzz, and the color uniformity of the fabric surface. 

Confirm batch traceability: Understand whether the supplier has retained batch samples, whether there are color deviation internal control standards, and the handling mechanism in case of color deviations. 

Dongguan Donghong New Materials Co., Ltd. specializes in the production and supply of PP yarn, polypropylene colored yarn, PP colored yarn, and polypropylene FDY filament. The product colors can be customized. Please feel free to send samples for testing and communicate technical requirements. 

Official website: http://m.emoves.net/ 

Contact person: Mr. Wu 13808838926 

Mr. Xu 13808858186 

Fax: 0769-2208092 

Email: dg@dgfibre.com 

Address: Wen Tang Brick Kiln Area, Dongcheng District, Dongguan City