DTY (Draw Textured Yarn) – Zehaztapen Teknikoak

1. What is DTY?

DTY (Polyester Drawn Textured Yarn) is a textured polyester filament yarn produced from PET chips. The process starts with high‑speed spinning to produce POY (Partzialki orientatutako haria), which is then drawn and false‑twist textured. This process is efficient, cost‑effective, and yields high‑quality yarn with excellent bulk and stretch properties.

2. Aplika daitezkeen arauak

• Estandar Nazionala: GB/T 14460‑2015 “Polyester drawn textured yarn” (apiriletik aurrera indarrean 1, 2016), replacing GB/T 14460‑2008.

• Industry Standard: FZ/T 54134‑2022 “Antimony‑free polyester drawn textured yarn (DTY)” – applicable to round‑cross‑section, semi‑dull antimony‑free DTY with total linear density from 30 dtex to 350 dtex and monofilament linear density from 0.5 dtex to 5.6 dtex.

DTY is graded into Goi-mailakoa (First), First‑class, eta kualifikatua products.

3. Propietate fisiko nagusiak

3.1 Dentsitate lineala (Fintasuna)

Linear density indicates yarn thickness. Expressed as “dtex/f” –adib., 167 dtex/48 f esan nahi du:

• dtex: pisua gramotan 10,000 metro hari. 167 dtex = 10,000 m weighs 167 g.

• Denier (D): another unit; conversion: 1 D = dtex / 1.11, so 167 dtex ≈ 150 D.

• f: banakako harizpi kopurua (e.g., 48 f = 48 monofilaments).

Common DTY fineness range: 15 D ~ 1000 D, with filament counts from 24 f to 576 f.

3.2 Tenacity hautsi

Hariak hautsi aurretik jasan dezakeen trakzio-indar maximoa, urtean adierazia cN/dtex.

• Minimum requirement: generally ≥ 3.0 cN/dtex.

• Sorta tipikoa: 3.0 – 4.8 cN/dtex.

• Esangura: directly affects fabric tear strength and abrasion resistance. Low tenacity can cause weak fabrics and frequent breakage during weaving.

3.3 Luzapena Hausturan

Hausteko unean luzapen-portzentaia.

• Sorta tipikoa: 18% – 30% (some products can be 25% ± 3%).

• Lower elongation usually gives better dyeing uniformity, higher strength, and higher crimp contraction; excessive elongation can produce stiff filaments, reduce shrinkage, and cause difficulties in setting and wrinkling during dyeing and finishing.

3.4 Crimp Contraction

Indicates bulkiness and elasticity of DTY.

• Regular DTY: generally ≤ 20%.

• High‑elastic network yarn: around 30%.

• Higher crimp contraction gives better bulk and fuller fabric hand.

3.5 Irakiten Uraren Uzkurdura

Uzkurtze-tasa 100 °C-ko uretan tratatu ondoren.

• Critical for downstream weaving and dyeing. Too high may cause length shortage but good setting; too low may lead to poor setting and wrinkling.

3.6 Oil Pick‑Up (SABALA)

Oil content on the yarn, providing lubrication, antistatic, antibacterial, and antioxidative functions.

• Recommended levels by end‑use:

  • Warp yarn: ~1.0%

  • Knitting: ~1.5%

  • High‑tension weaving (rapier, jacquard): ≥ 2.5%

4. Zehaztapen komunak & Parametro tipikoak

Oharra: “Center value” or “M” can be agreed between customer and supplier.

5. Aukerako Parametroak

DTY can be customized according to customer requirements:

Interlacing degrees:

• NIM (non‑interlaced): 0 – 10 korapilo/m

• SIM (semi‑interlaced): 40 – 50 korapilo/m

• HORI (high‑interlaced): 100 – 120 korapilo/m

6. Aplikazio nagusiak

DTY is an ideal raw material for knitting (both warp and weft) eta ehungintza. Major end‑uses include:

• Arropa: suits, shirts, sportswear

• Etxeko ehungintza: quilt covers, ohe-oholak, mosquito nets, curtains, sofa fabrics

• Decoration: wall coverings, automotive interior fabrics

• Industrial textiles: luggage fabrics, seat covers

Fine‑denier DTY (especially trilobal cross‑section) is suitable for silk‑like fabrics, while medium‑to‑coarse denier is used for wool‑like fabrics.