Pulp for producing a fiber-based preform

EP4728135A1Pending Publication Date: 2026-04-22ALPLA WERKE ALWIN LEHNER
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
ALPLA WERKE ALWIN LEHNER
Filing Date
2024-06-15
Publication Date
2026-04-22

AI Technical Summary

Technical Problem

The existing methods for producing fiber-based blanks, such as containers, are time-consuming and energy-intensive, and prone to deformation or damage due to uneven drying and external influences, especially when using microwave radiation with varying moisture content.

Method used

Incorporating a microwave-sensitive additive, such as silicon ceramic, chitosan, or carbon nanotubes, into the pulp to enhance even heat generation during drying, allowing for efficient water content reduction using microwaves, and using a microwave-permeable press mold to protect the blank from deformation.

Benefits of technology

This approach enables consistent and efficient drying of fiber-based blanks, preventing overheating and deformation, while maintaining the structural integrity and dimensional stability of the containers with a water content reduced to 5-12%, ensuring stable and strong final products.

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Abstract

The invention relates to a pulp for producing a fiber-based preform, in particular using a method for reducing the water content in the fiber-based preform, in particular in a container or a fiber-based closure element for a container. The pulp contains water and fibers. The pulp contains at least one additive that is microwave-radiation-sensitive.
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