Polyester DTY Yarns Suppliers

• DTY Semidull Color Card
• FDY Color Card
• Pary Rug Yarn Color Card 1
• Pary Rug Yarn Color Card 2

In order to guarantee the quality of products , we actively introduce advanced technology and equipment at home and abroad, ongoing technological transformation and innovation, improve the level of production. Up to now, the group has owned the production equipment which were introduced from the developed countries such as Germany and domestic well-known companies ,and owned a complete set of production line matched with the equipment , leading to annual output of 120,000 tons of spinning and draw texturing . The group has imported ISO9000 quality certification system, and established a mature system of quality management . Excellent quality always comes from sophisticated equipment and excellent management. More than 80% of the key production equipments in the group are introduced from Germany and domestic famous enterprises, reaching the international first-class equipment level.

Frequently Asked Questions

What is the difference between single-heater and double-heater DTY?

Single-heater DTY (SH-DTY) uses one heat-set zone during false-twist texturing, retaining higher residual crimp energy, greater stretch, and higher boil-off shrinkage. It is preferred for elastic circular knit fabrics where stretch and bulk are the primary performance requirements. Double-heater DTY (DH-DTY) passes through a second relaxation heater that reduces residual torque and shrinkage, producing a more dimensionally stable yarn suited to woven fabrics and applications where controlled shrinkage in wet processing is required.

Why does single-jersey fabric made from DTY show skew or torque?

Torque in single-jersey fabric is caused by residual twist energy in the DTY filaments. When a single twist direction (all S or all Z) is used across the fabric, the unbalanced torque forces cause the fabric to rotate or skew. This is addressed by using S/Z balanced DTY — either alternating S and Z twist packages on the creel, or using intermingled S/Z DTY — which cancels the opposing torque forces at the fabric level and produces a dimensionally stable, torque-free single jersey.

What causes dye streaks or barre in DTY knitted fabrics?

Dye streaks and barre in DTY knitted fabrics typically originate from crimp contraction ratio (CCR) variation between packages, lot-to-lot birefringence differences in the POY feed yarn, or OPU inconsistency affecting draw uniformity during texturing. These variations produce filaments with different light reflectance and dye uptake after piece dyeing. Controlling POY feed quality and specifying tight CCR tolerances for DTY reduces the incidence of barre defects in production fabric runs.

Can DTY be used directly in air-jet weaving as weft yarn?

Double-heater DTY can be used as weft in air-jet weaving for peach-skin, brushed, and soft-handle woven fabric constructions. However, DTY has higher bulk and lower linear stiffness than FDY, which requires adjusted air pressure and weft accumulator tension settings compared to flat yarn weft. Single-heater DTY is generally not recommended for air-jet weft insertion due to its higher residual shrinkage and crimp energy, which can cause filling bar defects in the finished fabric.

What denier and filament count is recommended for activewear circular knit fabrics?

For standard activewear single-jersey or interlock fabrics produced on 28-gauge circular knitting machines, 75D/72f or 100D/144f semi-dull DTY are commonly specified. Higher filament counts (144f or above) produce a finer, smoother fabric surface with better moisture wicking distribution across the filament bundle. For heavier-weight performance fabrics such as double jerseys or fleece grounds, 150D/96f or 150D/144f DTY provides the required cover and bulk in the knit structure.

Is recycled DTY (rDTY) equivalent to virgin DTY in processing and performance?

rDTY produced from GRS-certified recycled PET feed yarn is engineered to match the key processing parameters of virgin DTY, including tenacity, elongation, CCR, OPU, and interlace node count. In most circular knitting and weaving applications, rDTY can be substituted for virgin DTY without machine setting changes. Minor lot-to-lot color consistency differences may be more variable in rDTY due to the variability of recycled PET chip color; this is typically managed through pre-production dye trials for color-critical fabric programs.

Application Scenarios

Apparel End Uses

• Sportswear and Activewear: Moisture-wicking DTY (trilobal or modified cross-section variants) in circular knit constructions for performance athletic garments.
• Outerwear and Mid-Layer: SD and FD DTY in fleece and thermal knit fabrics for insulating garment layers.
• Intimate Apparel and Lingerie: Fine-denier DTY (50D–100D) in warp-knitted lace bases and stretch fabrics.
• Casualwear and Fashion Fabrics: CD-DTY and trilobal DTY for melange, heather, and silk-effect knitted fabrics.

Home Textiles

• Sofa and Upholstery Fabrics: Medium to heavy denier DTY in woven and warp-knitted upholstery for softness and abrasion resistance.
• Blankets and Throws: High-bulk DTY in circular knit or warp-knit fleece constructions for thermal insulation products.
• Curtain and Decorative Fabrics: Full dull DTY in woven drapery fabrics requiring matte surface and dimensional stability.
• Carpet and Rug Pile: Coarse denier DTY (300D–600D) in tufted carpet pile for residential and commercial flooring applications.

Technical and Functional Textiles

• Thermal and moisture management fabrics using moisture-transport DTY variants.
• Medical compression knits requiring controlled stretch and recovery characteristics.
• Automotive interior textiles using FD or SD DTY in woven and knitted seat fabric constructions.

Processing Guidelines & Handling Notes

Storage Conditions

• Store DTY packages in a clean, dry environment at 15–30°C and 50–70% relative humidity. OPU-finished DTY is sensitive to elevated temperature and humidity, which accelerate oil oxidation and alter friction characteristics.
• Keep packages in sealed cartons or bags until use. Exposure to airborne contaminants and direct airflow can reduce OPU through evaporation, leading to increased yarn-to-needle friction in knitting.
• Avoid stacking packages under excessive compression weight, which can distort package geometry and cause uneven unwinding tension.
• Apply FIFO rotation in warehouse management; DTY with extended storage time may exhibit OPU aging effects that increase breakage rates in high-speed knitting operations.

Quality Inspection Points on Receipt

• Crimp Contraction Ratio (CCR): Out-of-spec CCR directly affects fabric stretch and dimensional behavior; test CCR per standard method before releasing to production.
• Boil-Off Shrinkage: Elevated shrinkage values, particularly in single-heater DTY, will cause fabric width loss during dyeing and finishing; verify against specification before fabric production.
• OPU Level: Verify OPU is within the specified range; deviation in either direction affects machine friction and yarn processability at high speeds.
• Interlace Node Count: Measure interlace nodes per meter; insufficient interlacing is a common cause of warp or weft separation in weaving and loop defects in knitting.
• Package Condition: Inspect for ribbon winding, package edge deformation, and contamination before loading onto knitting or weaving creel.
• Dyeability Test: For cationic dyeable (CD) DTY, verify dye uptake with a standard cationic dye test swatch before bulk production to confirm correct copolymer grade.