Method for manufacturing an absorbent web-based product, absorbent web-based product and apparatus for manufacturing an absorbent web-based product

The method of preparing fibrous foam with specific composition and processing it into absorbent web-based products addresses the inefficiencies of the wet-laid process, achieving energy and material savings while enhancing product quality.

WO2025119469A1 Publication Date: 2025-06-12ESSITY HYGIENE & HEALTH AB
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Patent Information

Application Number
PCT/EP2023/084565
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-12-06
Publication Date
2025-06-12

AI Technical Summary

Technical Problem

The existing wet-laid process for manufacturing absorbent web-based products is inefficient in terms of raw material and energy usage, and struggles to produce lightweight, low-density products with high consistency.

Method used

A method involving the preparation of fibrous foam with a fiber content of 5% to 60% by weight, a surface active agents content of 0.02% to 1.20% by weight, and a liquid content of 40% to 95% by weight, and dispersing gas to achieve a gas content of 64% or more by volume, followed by forming, draining, and drying to produce an absorbent web-based product.

Benefits of technology

This method reduces raw material and energy consumption while achieving high-quality absorbent web-based products with excellent basis weight, softness, strength, and absorbency.

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Abstract

This disclosure relates to a method of manufacturing an absorbent web-based product including the steps of: preparing a fibrous foam, wherein the preparing comprises dispersing fibers and one or more surface active agents in a liquid, with a fiber content of 5% to 60% by weight, a surface active agents content of 0.02% to 1.20% by weight, and a liquid content of 40% to 95% by weight and supplying and dispersing gas in the liquid until a gas content of 64% or more by volume is reached, forming the fibrous foam into a foam layer, draining the fibrous foam in the foam layer to form a fibrous web, wherein the fibrous web has a liquid content of 20% to 85% by weight, and drying the fibrous web to obtain an absorbent web-based product.
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