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POY
POY (Partzialki orientatutako haria) – Zehaztapen Teknikoak
1. What is POY?
POY (Partzialki orientatutako haria), also known as polyester pre-oriented yarn, is a filament yarn produced by high-speed spinning (typically 3,000 – 4,000 m/min). Unlike FDY which is fully drawn, POY is only partially oriented, meaning its molecular chains are aligned to some extent but not fully stretched. This intermediate state gives POY excellent storage stability and makes it the ideal precursor for producing DTY (Draw Textured Yarn) through further drawing and texturing processes.
2. Aplika daitezkeen arauak
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Industry Standard: FZ/T 54133-2022 “Antimony‑free polyester partially oriented yarns (POY)” – applies to round-cross-section, semi-dull antimony-free POY with total linear density from 55 dtex to 600 dtex eta monofilament dentsitate lineala 0.8 dtex to 8.0 dtex, used for draw-texturing and drawing.
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Industry Standard: FZ/T 54058-2012 “Polyester partially oriented/drawn bi-shrinkage filament yarns” – applies to POY/FDY bi-shrinkage yarns with total linear density from 30 dtex to 400 dtex eta monofilament dentsitate lineala 0.5 dtex to 5.6 dtex.
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Group Standard: T/ZZB 2900-2022 “Polyester partially oriented yarns” – applies to POY with total linear density from 20 dtex to 1,500 dtex eta monofilament dentsitate lineala 0.3 dtex to 10.0 dtex.
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International Standard: ISO 12834:2024 “Textiles – Synthetic filament yarns – Test method for dynamic thermal stress of partially oriented yarns (POY)” – developed by Tongkun Group, this standard describes the test method for dynamic thermal stress of POY with linear density below 800 dtex.
POY products are typically graded into AA (Goi-mailakoa), A (Lehen mailakoak), eta kualifikatua kalifikazioak.
3. Propietate fisiko nagusiak
3.1 Dentsitate lineala (Fintasuna)
Dentsitate lineala honela adierazten da “dtex/f” –adib., 167 dtex/48 f esan nahi du:
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dtex: pisua gramotan 10,000 metro hari.
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f: banakako harizpi kopurua.
Common POY fineness range: 20 D ~ 1,500 D. DPF (denier per filament) can reach as low as 0.125 – 1.0 dtex.
3.2 Tenacity hautsi
Hariak hautsi aurretik jasan dezakeen trakzio-indar maximoa, urtean adierazia cN/dtex.
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Sorta tipikoa: 2.0 – 2.5 cN/dtex.
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Some sources indicate minimum ≥ 2.5 g/ukatzailea.
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Bright POY products may have tenacity around 2.53 cN/dtex.
Esangura: POY has lower tenacity compared to FDY because it is not fully drawn. This allows it to be further processed (drawn and textured) into DTY with higher strength.
3.3 Luzapena Hausturan
Hausteko unean luzapen-portzentaia.
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Sorta tipikoa: 110% – 150%.
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Some products may have elongation around 120% – 130%.
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Typical average: ~130%.
Esangura: POY has high elongation due to its partially oriented molecular structure. This high extensibility is essential for downstream drawing and texturing processes.
3.4 Irakiten Uraren Uzkurdura
Uzkurtze-tasa 100 °C-ko uretan tratatu ondoren.
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Sorta tipikoa: 55% – 65%.
Esangura: High shrinkage reflects the low orientation and high potential for further drawing, which is a key characteristic of POY.
3.5 Olioa jasotzea (SABALA)
Oil content on the yarn for lubrication, antistatic, and fiber cohesion functions.
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Sorta tipikoa: 0.30% – 0.40%.
3.6 Evenness (Uster Value – U%)
Measures the uniformity of the yarn.
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Typical requirement: < 1.2%.
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Typical achieved range: 0.72% – 1.14%.
Esangura: Good evenness ensures consistent dyeing and processing performance in downstream operations.
3.7 Molecular Orientation
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Sorta tipikoa: 60% – 70%.
This intermediate orientation level is what defines POY and enables its subsequent processing into DTY.
4. Zehaztapen komunak & Parametro tipikoak
Jarraian, industriako datuetan oinarritutako erreferentzia-taula bat dago:
| Zehaztapena | Fintasuna (Dtex) | Irmotasuna (cN/dtex) | Luzapena (%) | Olioaren edukia (%) | Uster (U%) |
|---|---|---|---|---|---|
| 136D/36f | 136 ± | 2.40 – 2.58 | 120 – 124 | 0.32 | 0.72 – 1.14 |
| Bright POY | — | ~2.53 | ~129.8 | ~0.35 | ~1.04 |
Common POY Product Range (Erdi tristea):
| Denier sorta | Common Applications |
|---|---|
| 15D – 330D | Standard range for DTY production |
| 55D – 600D | FZ/T 54133-2022 scope |
| 20D – 1500D | T/ZZB 2900-2022 scope |
5. Aukerako Parametroak
POY can be customized according to customer requirements:
| Parametroa | Eskuragarri dauden aukerak |
|---|---|
| Distira | Distiratsua, Erdi tristea |
| Zeharkako forma | Biribila, Trilobala, Triangular |
| Dyeing | Dopez tindatuak (hainbat kolore) |
| Special functions | Antibacterial, Flame-retardant, etab. |
6. Aplikazio nagusiak
POY is primarily used as an intermediate product for further processing:
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DTY Production: POY is the primary feedstock for draw-texturing to produce DTY (Draw Textured Yarn).
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FDY Production: POY can be further drawn to produce FDY (Erabat marraztutako haria).
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Direct Weaving: Some POY products can be used directly in weaving applications.
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Blended Yarns: Used in combination with other fibers for specialty yarns.
Processing Equipment: Suitable for high-speed texturing machines, including Type 800, Type 1000, 33H, S+Z, TMT automatic, and other mechanical equipment.
