Cellulose Fiber Preparation for Preserving Length and Integrity

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Solution Overview

Problem

Existing methods for separating cellulose, hemicellulose, and lignin from plant material often disrupt one component at the cost of another, failing to produce long cellulose fibers suitable for bioproducts like packaging materials.

Innovation Solution

A method involving dewaxing, alkaline solubilization, bleaching, and controlled mechanical treatment to isolate cellulose fibers with a length-weighted average of >0.6 mm, using dry and enzymatic pretreatments to preserve fiber integrity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional separation methods are used to separate cellulose, hemicellulose, and lignin from plant material, then the components can be separated, but the cellulose fiber length is reduced and fiber integrity is disrupted

Engineering Contradiction:

Improvecellulose fiber lengthVSAvoidseparation process

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The invention separates the treatment of different plant material components into distinct sequential steps: first treating hemicellulose and lignin separately, then treating cellulose. This segmentation allows each component to be processed under optimized conditions without disrupting other components, thereby preserving cellulose fiber length while achieving complete separation of all three components.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention applies preliminary treatment steps for hemicellulose and lignin removal before subjecting cellulose to mechanical treatment. By removing hemicellulose and lignin first through chemical or enzymatic treatments, the cellulose fibers are protected from disruption during subsequent processing, maintaining their length and integrity.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If harsh chemical treatments are applied to separate components, then separation efficiency improves, but cellulose fiber integrity and length are compromised

Engineering Contradiction:

Improveseparation efficiencyVSAvoidfiber integrity

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The invention changes the parameters of treatment by using milder chemical conditions or enzymatic treatments instead of harsh chemicals. By adjusting pH, temperature, and treatment duration parameters, the process achieves effective separation of hemicellulose and lignin while preserving cellulose fiber integrity and length.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention introduces enzymes as intermediaries to facilitate the separation process. Enzymes selectively degrade hemicellulose and lignin without damaging cellulose fibers, enabling efficient separation while maintaining fiber integrity. This intermediary approach replaces harsh chemical treatments with more selective biological catalysts.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Quantity of substance

If mechanical treatment is applied early in the process, then component separation is achieved, but cellulose fibers are shortened and damaged

Engineering Contradiction:

Improvecomponent separationVSAvoidcellulose fiber length

Core Design Contradiction:

Quantity of substanceVSLength of moving object

Solution Approach 1:

The invention performs chemical or enzymatic treatment of hemicellulose and lignin before applying mechanical treatment. This preliminary action weakens the bonds between components and protects cellulose fibers, allowing subsequent mechanical treatment to achieve complete separation without significantly shortening or damaging the cellulose fibers.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention applies different treatment qualities to different components: mild chemical or enzymatic treatment for hemicellulose and lignin, and controlled mechanical treatment for final separation. This localized quality approach ensures that cellulose fibers receive minimal disruptive treatment while other components are effectively separated.

Inventive Principle:

Principle #3Local quality

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Produces cellulose fibers with improved length for enhanced folding endurance, suitable for molded pulp applications, while minimizing disruption to other components.

Implementation Method 1

enzymatic treatment to facilitate removal of residual non-wax plant material

Methodology Applied

Scientific EffectEnzymatic degradation: Enzyme

Implementation Method 2

adjusting the pH to alkaline conditions and increasing the temperature of the solution to solubilize hemicellulose and lignin components

Methodology Applied

Scientific EffectAlkaline solubilization: Solvation

Implementation Method 3

adding a bleaching agent, and keeping said cellulose fiber fraction in suspension

Methodology Applied

Scientific EffectOxidation: Oxidation

Data Source

PatentUS12448730B2Preparation of cellulose fibers

Publication Date: 2025.10.21 JENA TRADING APS

AI summary

The present invention provides a method of producing an improved cellulose pulp consisting of cellulose fibers of a desired length, such as cellulose fibers having a length-weighted average fiber length Lc(l)>0.6 mm and its use in cellulose pulp-comprising products, such as packaging material with improved properties.