Method and apparatus for dry production of rigid cellulose products
The method and apparatus address the inefficiencies of existing cellulose production by using a forming drum with non-uniform perforations to control fiber distribution, ensuring strong, crack-resistant cellulose products with adjustable properties.
JP7917546B2Active Publication Date: 2026-09-08ヤンギ·アクチボラグ
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Patent Information
- Application Number
- JP2023570077
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2021-05-12
- Filing Date
- 2022-01-17
- Publication Date
- 2026-09-08
- Estimated Expiration
- 2042-01-17
AI Technical Summary
Technical Problem
Existing methods for producing rigid cellulose products with non-flat shapes face challenges such as high water consumption, complex processes, and cracking during pressing, which hinder their scalability and efficiency.
Method used
A method and apparatus utilizing a forming drum with non-uniform perforation densities to control cellulose fiber distribution, allowing for variable basis weights and preventing cracking, while using air-dry agglomeration to form continuous or discontinuous cellulose blanks.
Benefits of technology
The solution provides cellulose products with enhanced strength and rigidity, reduces cracking, and allows for adjustable basis weights, improving manufacturing efficiency and flexibility.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention relates to an apparatus (100) and a method for dry manufacturing of a rigid cellulosic product having an essentially non-flat overall shape. The apparatus (100) comprises a disintegrating unit (3), a cellulose blank forming unit (30) and a product forming unit (40) for making a rigid cellulosic product (14). The cellulose blank forming unit (30) comprises a dispenser for directing a cellulose fiber carrying air stream from the disintegrating unit (3), a forming drum (15) having an outer surface including perforations, the outer surface being configured to receive the cellulose fibers and form a cellulose blank (13), an air removal device (54) arranged within the forming drum (15) and a support structure (8) for receiving the cellulose blank (13) from said forming drum (15). The apparatus (100) is characterized in that the outer surface of a forming drum (15) includes a first area having a first perforation density and a second area having a second perforation density less than the first perforation density, forming a continuous or discontinuous cellulose blank (13) having a higher basis weight at a first location derived from the first area than at a second location derived from the second area.
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