Polypropylene FDY Double Twist Yarn: Product Features, Application Domains and Selection Reference

In the series of advanced processing products of polypropylene yarns, Polypropylene FDY Double Twist Yarn is made from polypropylene fully stretched yarn and processed by double twisting machine. The double twisting process applies a specific twist to the single yarn, enabling the yarn to achieve a more compact structure and a stable twisting state, thereby improving its mechanical properties and fabric appearance. Compared with the FDY straight yarn without twisting, double twist yarn shows differentiated performance in weaving passability, fabric anti-pilling property and drape, and is suitable for various processing requirements of textiles. Processing technology

The processing of polypropylene FDY double-twist yarn is based on FDY yarn as the raw material, and is carried out through double-twist machines for twisting and plaiting. The working logic of the double-twist machine is: two or more FDY yarns are wound and combined in a set twisting direction and twist degree to form a joint yarn with a certain twist. This process causes the parallelly arranged single yarns to have a helical relative displacement and close contact, increasing the internal cohesion and overall structural stability of the yarn.

The adjustable process parameters in the double-twist process mainly include twisting direction, twist degree and plaiting number. Different parameter combinations correspond to different yarn structure characteristics and usage performance. During production, specific settings can be made according to the requirements of the subsequent weaving process and the final product.

Performance characteristics

The performance characteristics of polypropylene FDY double-twist yarn are significantly different from those of un-twisted FDY yarn. The twisting effect increases the friction resistance between the fibers inside the yarn, and the overall strength of the yarn increases after plaiting, capable of withstanding greater stretching and friction loads during weaving. The surface fuzz of the yarn is reduced due to the twisting effect, and it is less likely to shed or ball up during weaving.

The drape of double-twist yarn is better than that of straight yarn. The fabric made from it has good softness and body, and is suitable for fabrics that require a good draping effect. At the same time, the stable twisting structure makes the yarn less likely to disintegrate during subsequent rewinding and weaving, reducing the downtime caused by unstable yarn conditions.

The polypropylene material endows double-twist yarn with lightweight, quick-drying and chemical corrosion-resistant properties, enabling the double-twist yarn products to retain the inherent advantages of polypropylene while achieving better structural stability and weaving adaptability. Application fields

Fabric Fabrics: Polypropylene FDY double-twisted yarn is used for processing woven and knitted fabrics. The fabric made from the twisted yarn has good anti-pilling and dimensional stability, and is suitable for sportswear, casual jackets, and functional underwear fabrics.

Home Decorative Fabrics: Used for the weaving of curtains, sofa covers, and bedding sets. The double-twisted fabric yarn has good drape and color expression, and with the polypropylene liquid dyeing technology, it can be made into decorative textiles with firm colors and easy maintenance.

Industrial Textiles: Some specifications of the double-twisted yarn are used in industrial sewing threads, filter fabric bases, and webbing, etc. Due to the acid and alkali resistance and lightweight characteristics of polypropylene, it has applications in the chemical and environmental protection fields.

Selection Considerations

When choosing polypropylene FDY double-twisted yarn, the following points should be noted:

Twist Direction and Twist Degree Matching: Different fabrics have specific requirements for the yarn twist direction and twist degree. Plain weave usually selects a lower twist degree to maintain a soft hand feel; diagonal and satin weave can choose an appropriate twist degree according to the style requirements.

Number of Bundles and Fabric Weight: The number of bundles affects the thickness of the yarn and the final fabric weight. Light and thin fabrics should use fewer strands of fine yarn, while thick fabrics require more strands of thick yarn.

Compatibility with Weaving Processes: Before winding and weaving, it is recommended to conduct a small sample test to confirm the yarn's unwinding performance, breakage rate, and weaving pass rate to determine the most suitable weaving process parameters.

Post-Treatment Temperature Control: The thermal setting temperature window of polypropylene is narrow. In the post-treatment process of the fabric, the setting temperature should be controlled within the safe range to avoid fiber structure relaxation and strength reduction due to overheating.

Storage and Usage Suggestions

The double-twisted yarn should be stored in a cool, dry, and dark place to avoid long-term exposure to sunlight, which can cause aging. During transportation and storage, avoid squeezing to prevent the bobbin from deforming. It is recommended to place the yarn in the workshop environment for a period of time before weaving to balance the temperature and humidity with the workshop conditions to reduce tension fluctuations.

In summary, Polypropylene FDY Double Twist Yarn improves the structural stability and weaving adaptability of the yarn while maintaining the lightweight and hydrophobic properties of polypropylene. It provides a raw material option for downstream weaving enterprises that combines the performance advantages of polypropylene and the structural characteristics of twisted yarns, suitable for textile processing scenarios with certain requirements for fabric anti-pilling, drape, and dimensional stability. When selecting, it is recommended to combine the specific style requirements of the fabric and weaving process conditions to choose products with appropriate bundle number and twist degree specifications.