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Polyester Draw Textured Yarn (DTY) is a manufactured filament yarn produced from polyester POY through a controlled drawing and texturizing process. By combining mechanical deformation with thermal treatment, the smooth filament structure of POY is transformed into a yarn with permanent texture, bulk, and stretch. This transformation allows DTY to achieve stable physical performance while maintaining consistency in appearance and handling.

Texturizing and Drawing Process

The defining characteristic of polyester draw textured yarn lies in its simultaneous drawing and twisting under heat. During production, the yarn undergoes a sequence of hot drawing, twisting, thermosetting, and de-twisting, which permanently alters the molecular alignment of the polyester filaments. Heat setting plays a critical role in fixing the crimp structure, ensuring the texture remains stable during subsequent processing and use.

Different heating techniques can be applied depending on the required yarn performance. By adjusting temperature and process conditions, the yarn can be set to meet specific processing demands while maintaining uniform texture and dimensional stability.

Intermingling Structure and Control

To enhance filament cohesion, polyester DTY can be produced with varying levels of intermingling. This process uses specially designed air-jet nozzles and controlled air pressure to create small knots along the yarn length. These knots improve yarn integrity without the need for additional twisting.

• Non-Intermingled (NIM): 0–10 knots per meter, offering a smooth and open structure

• Semi-Intermingled (SIM): 40–50 knots per meter, providing balanced cohesion

• High-Intermingled (HIM): 100–120 knots per meter, ensuring strong filament binding

By selecting different intermingling levels, the yarn can maintain consistent running performance during downstream textile processing.

Physical and Functional Properties

Polyester DTY exhibits a range of inherent properties derived from its structure and material composition:

• Can be produced in multiple colors through dope-dyed technology or conventional dyeing

• Good insulation properties resulting from its textured and bulky structure

• Lightweight construction combined with effective covering performance

• Ability to create a wool-like and matte appearance without the use of natural fibers

• High resistance to wear and tear, supporting durability in repeated use

• Very low moisture content, contributing to dimensional stability and consistent performance

Overall Characteristics

Through the controlled combination of drawing, texturizing, and intermingling, polyester draw textured yarn achieves a balance between structure, elasticity, and durability. Its stable texture, adjustable cohesion, and consistent physical properties make it a reliable synthetic yarn solution. Hangzhou Futureyarn Textile Co., Ltd. focuses on producing polyester DTY with controlled quality and performance to meet defined processing requirements.

https://www.futureyarn.com/heat-setting-and-texture-stability-in-polyester-draw-textured-yarn.html
Hangzhou Futureyarn Textile Co.,Ltd.

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