The inclined wire paper machine is a special papermaking equipment that uses an inclined wire forming device.
It is mainly used to produce wet-laid nonwoven fabrics and specialty papers with low-concentration pulp (0.2-0.8 g/L), such as filter paper and medical supplies. It features high dewatering efficiency and uniform fiber distribution.
Working Principle and Structural Features
The core of the inclined wire paper machine is to achieve pulp dewatering and shaping through an inclined wire surface. Its key design includes:
Inclined Wire Forming Device:
The pulp is sprayed onto the inclined wire surface at a low concentration (0.2-0.8 g/L), utilizing gravity and… Vacuum dewatering prevents fiber agglomeration and ensures product uniformity.
Dewatering System:
Equipped with a vacuum suction box and loading platform, forced dewatering achieves a wet paper web dryness of 20%.
A dilution water system is required to maintain the pulp in suspension, achieving a concentration only 1/10 that of conventional paper machines.
Structural Components:
Headbox: Controls the pulp spray angle and speed to ensure uniform distribution.
Press Section: Employs vacuum composite pressing to reduce air permeability loss (approximately 15%-20%).
Drying Section: Hot air drying or through-drying cylinders (TAD cylinders) are preferred to prevent further reduction in air permeability.
Inclined wire paper machine Application Areas and Technical Parameters
Main Applications:
Industrial Applications: High-permeability filter paper (tea bags, air filter paper), battery separator materials, roofing waterproofing fabric.
Medical and Daily Necessities: Surgical paper, sanitary napkins, wet wipes substrate.
Technical Parameters:
Specification Range: Net paper width 1092mm-5600mm, machine speed 20-200m/min (single-layer model) to 40-200m/min (multi-layer model).
Suitable Raw Materials: Chemical fibers, hemp pulp, or cotton linters, requiring high dispersion treatment.
Inclined wire paper machine Differences from Traditional Paper Machines
Dewatering Method:
Inclined wire mesh dewatering machine: Double-sided dewatering (inclined wire surface + vacuum system), high dewatering efficiency, minimal difference between the two sides of the paper sheet.
Traditional machine (long wire/cylindrical wire): Single-sided dewatering, prone to fiber flocculation and differences in two-sided properties.
Pulp adaptability:
Inclined wire mesh dewatering machine: Designed specifically for low-concentration long fibers (such as hemp pulp), concentration ≤0.8g/L.
Traditional machine: Applicable concentration 1%-3%, cannot handle highly dispersed pulps.
Product performance:
Inclined wire mesh dewatering machine: High air permeability (loss rate 15%-20%), suitable for porous materials.
Traditional machine: High strength but poor air permeability, mostly used for cultural paper.