Method and machine for producing an air-laid fiber web
By adding additional air after defiberizing and optimizing fiber distribution, the method enhances the quality and uniformity of fibrous webs produced at industrial speeds, addressing the limitations of conventional dry air laying processes.
Patent Information
- Application Number
- DE102024130446
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2026-02-05
- Estimated Expiration
- 2044-10-21
AI Technical Summary
Existing dry air laying processes for producing fibrous webs, such as paper, board, or tissue webs, face challenges in achieving high-quality formation, uniform fiber distribution, and mechanical strength, especially at industrial scales, using conventional bale market pulp, leading to unsatisfactory results in terms of formation, feel, appearance, and surface weight profiling.
A method involving the addition of additional air after the last defiberizing device and before the forming device to decouple fiberization and dry forming processes, allowing for precise control of fiber parameters and formation, with multiple air supply stages to optimize fiber distribution and reduce fiber bundles with nodes, enabling high-speed production of high-quality fibrous webs.
The method achieves high-quality fibrous webs with improved formation, mechanical strength, and uniform surface weight profiles, suitable for industrial production speeds exceeding 300 m/min, using conventional bale market pulp, while minimizing energy consumption and costs.