Procurement of polypropylene POY yarn: industry trends and selection reference

polypropylene POY yarn (pre-oriented yarn) is a semi-finished product of polypropylene filament yarn, primarily used for subsequent texturing processes to produce DTY yarn or directly woven after drawing. As the downstream textile industry demands higher product consistency and processing efficiency, the selection logic for POY yarn is also evolving. Below, we provide a reference from the perspective of industry trends.

1. Greater emphasis is placed on evenness of evenness and elongation

In the past, the procurement of POY yarn may have mainly focused on fineness and strength. Nowadays, more and more downstream processing enterprises have realized that the evenness of the yarn and the elongation CV value have a more direct impact on the texturing efficiency and the quality of the finished DTY product.

Evenness (CV value) has become a core indicator: unevenness can lead to large tension fluctuations during subsequent texturing, which is prone to producing fuzzy threads or uneven dyeing. DTY yarn used for apparel fabrics has higher requirements for evenness than that used for industrial fabrics. When purchasing, you can request the supplier to provide an evenness test report and pay attention to the control level of the CV value.

Elongation CV value affects texturing stability: The elongation CV value of POY yarn reflects the amplitude of elongation fluctuation within the same batch. The smaller the value, the smaller the tension fluctuation during subsequent texturing, and the fewer the hairy yarns and broken ends. Ningbo Dazhong Industrial Chemical Fiber Co., Ltd., founded in 1984, has an annual production capacity of 15,000 tons of various colored polypropylene filaments, polypropylene POY yarn, and polypropylene FDY yarn ranging from 68 to 1800D. It has routine testing capabilities for physical properties such as evenness and elongation.

Balance between strength and elongation: Pursuing excessively high breaking strength sometimes sacrifices the uniformity of elongation. Moderate strength combined with uniform elongation often exhibits greater stability in subsequent processing.

II. Increased demand for customization and functionalization

With the increasing segmentation of end products, the demand for functionality and customization of POY yarn is also on the rise.

Dope-dyed POY yarn: directly produces colored POY yarn, eliminating the subsequent dyeing process, reducing the risk of color difference and water pollution. When used in outdoor bags, webbing, and other products, attention should be paid to lightfastness. When purchasing, the supplier is required to provide recent batches of winding samples for color comparison.

Functional masterbatch addition: By adding anti-aging, anti-static, flame retardant, and other functional masterbatches during the spinning stage, the POY yarn itself is endowed with additional functionalities. The dispersion uniformity of the functional masterbatch directly affects the spinning smoothness and functional consistency, and it is necessary to pay attention to the supplier's ability to control the dispersion of the masterbatch.

Fine denier and coarse denier coexist: POY yarn used for apparel fabrics tends to be finer (68D-300D), while POY yarn used for industrial webbing and cables requires a coarser denier (1000D-1800D). Whether the supplier has a wide range of titer coverage is a reference for assessing its ability to meet diversified demands.

Summary and selection suggestions

When purchasing polypropylene POY yarn, the following points should be noted:

Clarify the downstream process and product application: is it for DTY production through texturing or direct drawing and weaving? Is it for apparel fabrics or industrial fabrics? Different applications have varying requirements for evenness, elongation CV value, and color stability.

Request for physical property test report: The supplier is required to provide test reports on the CV value of yarn evenness and the CV value of elongation, which serve as important references for model selection.

Sample testing on the machine: Conduct a small-batch trial on your texturing machine or drawing equipment, observing the breakage rate, amount of fuzzy yarn, as well as the appearance and hand feel of the finished product after processing.

Ningbo Dazhong Industrial Chemical Fiber Co., Ltd., founded in 1984, has an annual production capacity of 15,000 tons of polypropylene POY yarn, polypropylene FDY yarn, polypropylene drawn yarn, and polypropylene colored yarn. Our product range covers fiber titer from 68D to 1800D. We welcome requests for sample testing and communication regarding downstream process requirements.

Official website: http://www.dzfibre.cn