Lift Sling Rigging Co., Ltd manufacture Hollow Braided Coreless Paper Carrier Rope,Paper Machine Threading Ropes.

Hollow Braided Coreless Paper Carrier Rope is a premium threading solution widely used in the papermaking industry. Unlike traditional ropes with a solid core, this rope features a unique hollow braided construction made from high-quality multifilament polyamide (nylon) fibers. It is designed to serve as the connecting link between various rollers in paper machines, including pre-dryers, dryers, post-dryers, coaters, and reels, efficiently pulling the narrow paper web from one roller to another.

Key Features & Advantages

1. Hollow Braided Construction

The rope is engineered with an 8-strand braided structure that creates a hollow core. This design offers several distinct benefits:

Round Shape Stability: The rope retains its circular cross-section throughout its entire service life, resisting flattening under normal operating tension.

Enhanced Threading Efficiency: The consistent round shape ensures smooth and reliable paper tail threading.

Easy Splicing: The hollow construction makes splicing significantly easier and more convenient compared to core-type ropes.

2. High-Strength Material

Manufactured from high-tenacity polyamide (nylon 6) industrial filaments, the rope offers excellent tensile strength and durability. Typical breaking strengths range from 10,800 N for 8mm diameter to 22,000 N for 16mm diameter ropes. The elongation at break is controlled at ≤30%.

3. Temperature & Abrasion Resistance

The rope is designed to withstand harsh operating conditions in paper machine drying sections:

Recommended Operating Temperature: Approximately 90–100°C

Maximum Operating Temperature: Up to 180°C

Some specialized variants, such as the Lanex UHT UNO, can resist temperatures up to 380°C using aramid (Technora) fibers.

4. Special Impregnation Treatment

The fibers are treated with a special impregnating agent (such as Teflon-based coating) that provides:

Protection against moisture, high temperature, and chemical agents

Enhanced grip on the paper tail due to high-friction staple fibers on the rope surface

Increased protection of the rope compactness against external effects

5. Versatile Applications

Paper Machine Threading: Ideal for pulling paper webs across various sections of the paper machine

Speed Compatibility: Primarily used for lower speed machines (under 800 m/min) and lighter weight paper grades

Alternative Applications: Can also be used in coating sections where chemical agents may affect rope performance

Technical Specifications

Data based on industry standards from multiple manufacturers

Comparison: Coreless vs. Core-Type

According to industry practice:

No Core Type (Hollow Braided): Mainly used for low-speed machines and lightweight paper. Features easy splicing and good flexibility.

Core Type (With Core): Recommended for higher-speed machines and heavier paper grades, offering better holding power and reduced elongation.

Important Usage Guidelines

Proper Tensioning: The rope must be properly tensioned under operating conditions to ensure optimal performance.

Splicing is Critical: The connection method directly affects the service life of the paper carrier rope. Splicing must be carried out according to manufacturer instructions, with a recommended splice length of at least 50 cm.

Replacement Considerations: When replacing old rope, pay attention to rope wheel direction and inner/outer rope arrangement to avoid crossing and tangling.

Quality & Customization

Hollow braided coreless paper carrier ropes are available from ISO 9001:2000 certified manufacturers. Standard colors include yellow, red, blue, violet, and green. Custom diameters, lengths, and colors can be produced upon request to meet specific paper machine requirements.

Conclusion

The Hollow Braided Coreless Paper Carrier Rope is a reliable, high-performance solution for paper threading applications. Its unique braided design, combined with high-quality nylon fibers and specialized impregnation, delivers excellent durability, easy splicing, and consistent paper grip. For mills seeking a cost-effective and efficient threading rope for standard paper machine operations, this coreless type remains the prevailing and most widely recommended choice in the industry