Lift Sling Rigging Co., Ltd manufacture Paper Machine Carrier Paper Rope Without Core,Paper Machine Threading.

Paper Machine Carrier Paper Rope Without Core, also known as Hollow Braided Coreless Paper Carrier Rope, is a specialized threading rope widely used in the papermaking industry. It is made from high-performance fibers such as nylon (polyamide) or DuPont Kevlar/Twaron, and features a unique 8-strand braided hollow construction that leaves a void in the center. This rope serves 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 core19. 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. According to industry sources, the "hollow" is instrumental in the easy splice procedure, and hollow braids are non-rotational and an efficient way to utilize fiber.

2. High-Strength Material

Manufactured from high-tenacity polyamide (nylon) or DuPont filaments, the rope offers excellent tensile strength and durability. The elongation rate of coreless paper carrier ropes is generally controlled at 3%–5%. A smaller elongation rate could cause the rope to break under speed differences between dryer sections, while a larger rate would cause the rope to become slack and lose its grip on the paper web.

3. Temperature & Abrasion Resistance

The rope is designed to withstand harsh operating conditions in paper machine drying sections, with high temperature resistance up to 180–280°C depending on the material used. The product demonstrates excellent wear resistance and strong tensile performance, significantly extending service life and reducing replacement frequency.

4. Special Surface Treatment

The fibers are treated with a special impregnation or coating process, providing:

• 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

• System Compatibility: Available in both dual-rope (for 40–120 g/m² paper) and triple-rope systems (for paper over 120 g/m²)

• Speed Range: Suitable for paper machine speeds of 300–800 m/min, with rope diameters typically ranging from 12–15 mm. For speeds above 800 m/min, thicker ropes may be used

• Alternative Applications: Also used for aluminum alloy casings and other industrial purposes

Common Specifications

Note: Coreless ropes typically have an elongation of 3–5%. If the elongation is too large, the rope may become slack and fail to carry the paper web. In such cases, switching to a cored rope can resolve the issue.

Comparison: Coreless vs. Core-Type

According to industry practice:

No Core Type (Hollow Braided): Mainly used for low-speed machines and lightweight paper grades. Features easy splicing and good flexibility. However, if the elongation is too large, the rope may become slack and fail to carry the paper web.

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.

Regular Inspection: The rope should be regularly checked and maintained to ensure normal operation and extend service life.

Quality & Customization

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 Paper Machine Carrier Paper Rope Without Core is a reliable, efficient, and cost-effective solution for paper threading applications. Its unique hollow braided design, combined with high-quality synthetic fibers and specialized surface treatment, delivers excellent durability, easy splicing, and consistent paper grip. For mills seeking a practical threading rope for standard paper machine operations operating at moderate speeds, this coreless type remains the prevailing and most widely recommended choice in the industry