Our DTY fine denier yarn paper core is a special paper core built for fine denier and ultra-fine denier DTY yarns. Aiming at the characteristics of fine denier yarn such as fine fineness, low strength, easy snagging and easy fuzzing, we focus on optimizing the surface smoothness and tube end smoothness of the paper core. Ordinary DTY paper cores have subtle burrs and fiber protrusions on the surface, which are very easy to be snagged and scraped to produce hairiness during high-speed winding and unwinding of fine denier yarn, resulting in a large amount of waste silk. Our DTY fine denier yarn paper core adopts multiple surface finishing processes to achieve zero burrs and zero fiber precipitation on the whole surface of inner wall, tube ends and tube body, protecting the surface quality of fine denier tows in all aspects.
In terms of process details, the tube body surface of DTY fine denier yarn paper core is treated with densification calendering, with fibers closely attached without floating fibers, uniform and stable friction coefficient, flat tow arrangement during winding and smooth tension without fluctuation during unwinding. The tube ends are treated with arc fine grinding and edge sealing, with rounded edges without edges and corners, and will not snag tows during threading and unwinding. The inner wall is treated with ultra-precision polishing, which will not scrape off paper scraps and contaminate tows during installation and disassembly. According to actual measurement, using this DTY fine denier yarn paper core can reduce the processing breakage rate of fine denier DTY by more than 40%, significantly improve the hairiness index, and effectively improve the grade and market competitiveness of finished yarn.

Specifications
|
Parameter Name |
Parameter Range |
|
Applicable Denier |
30D and below fine denier / ultra-fine denier DTY |
|
Standard Inner Diameter |
52mm / 76mm / 90mm (customizable) |
|
Standard Length |
200mm / 250mm / 300mm (customizable) |
|
Surface Roughness |
≤Ra2.0 |
|
Friction Coefficient Range |
0.30-0.38 |
|
Tube End Process |
Arc fine grinding and edge sealing |
Applications
-
Fine denier DTY production: winding and packaging of ultra-fine denier and porous DTY
-
High-end fabric yarn: processing of fine denier yarn for silk-like and high-end fabrics
-
Lightweight chemical fiber products: matching of fine denier textured yarn for ultra-thin fabrics
Quality Control
For the smoothness requirements of fine denier paper cores, we have established a special quality inspection process. The base paper is selected from high-purity fine fiber wood pulp paper to reduce the risk of fiber falling off from the source. The whole winding process is closed and dust-proof to avoid impurity adhesion. At the finished product stage, each piece is inspected for surface and tube end smoothness with a highlight magnifying glass to eliminate defects such as burrs, floating fibers and protrusions. We also sample each batch for tow friction test to simulate real winding conditions and verify whether there is snagging. All DTY fine denier yarn paper core undergoes 100% full appearance inspection before packaging, and clean packaging is used to avoid secondary pollution, ensuring that delivered products meet the strict requirements of fine denier production.
After-sales Service
We provide exclusive process adaptation services for fine denier yarn customers. After product delivery, the exclusive technical team can follow up customers' on-machine test situation, provide paper core parameter optimization suggestions for breakage rate and hairiness situation, and help customers achieve the best use effect. The product comes with a one-year warranty. Under standardized storage and use conditions, if non-human-caused quality problems occur, we will respond immediately and deal with them. We regularly visit fine denier yarn customers, collect product use feedback, continuously optimize surface treatment technology, and jointly improve the quality of fine denier yarn products with customers.
Packaging & Shipping
For the cleanliness requirements of fine denier paper cores, we adopt an exclusive clean packaging solution. Finished DTY fine denier yarn paper core products are first individually sleeved in clean PE bags to avoid dust and fiber pollution, then neatly stacked in clean corrugated cartons in fixed quantities, and the carton body is sealed. Handle with care during handling and container loading to avoid tube end deformation and burrs caused by collision. Trade terms support FOB delivery. We can cooperate with customers to complete export customs declaration and other procedures, ensuring that products remain clean and intact during transportation and can be directly used on the machine after delivery.
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