Cationized Vegetable Wax Impregnated Cellulose Sheets

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Solution Overview

Problem

Existing construction and packaging materials require water repellency and vapor barriers, often achieved with non-environmentally friendly materials like aluminum foil or silicone-based impregnations.

Innovation Solution

Cellulose fiber-based sheets impregnated with cationized vegetable wax provide a sustainable, water-repellent, and vapor-barrier solution for construction and packaging materials.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional materials like aluminum foil or polyethylene are used for water repellency and vapor barrier, then water barrier performance is improved, but environmental friendliness and sustainability deteriorate

Engineering Contradiction:

Improvewater barrier performanceVSAvoidenvironmental friendliness

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the chemical parameters of the wax by applying cationization treatment, which introduces positive charges to the wax molecules. This parameter change enables the wax to effectively bind to cellulose fibers while maintaining water repellency, achieving both environmental friendliness and functional performance

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite material system combining cellulose fibers (natural, renewable) with cationized vegetable wax (modified natural product). This composite approach replaces synthetic materials like aluminum foil and polyethylene, achieving water barrier functionality through the synergistic combination of natural materials with chemical modification

Inventive Principle:

Principle #40Composite materials

2Reliability

If silicone-based impregnation is used for water repellency, then water barrier performance is improved, but environmental sustainability deteriorates

Engineering Contradiction:

Improvewater barrier performanceVSAvoidenvironmental sustainability

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent employs vegetable wax, a renewable and biodegradable material that can be applied as a thin impregnation layer. Although the wax layer may require periodic replenishment, its environmental benefits and renewability make it superior to persistent silicone-based solutions

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The cationization modification changes the surface properties and charge distribution of the vegetable wax, enabling it to effectively impregnate cellulose fibers and provide water repellency comparable to silicone-based materials but with superior environmental credentials

Inventive Principle:

Principle #35Parameter changes

3Reliability

If cellulose fiber-based sheet is impregnated with cationized vegetable wax, then water repellency and vapor barrier are improved, but manufacturing complexity increases

Engineering Contradiction:

Improvewater repellencyVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The cationization of the vegetable wax is performed in advance during material preparation, creating a pre-modified wax product ready for impregnation. This preliminary action simplifies the manufacturing process by eliminating the need for complex on-site modification equipment

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces complex mechanical or physical water barrier structures with a chemically modified impregnation process. The cationized wax molecules chemically interact with the cellulose fibers, providing water repellency through molecular-level binding rather than through complex structural arrangements

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

The cellulose fiber-based sheets with cationized vegetable wax create a hydrophobic surface, offering effective water repellence and vapor barrier properties while being environmentally friendly and producible on an industrial scale.

Implementation Method 1

cellulose fiber-based sheets impregnated with cationized vegetable wax

Methodology Applied

Scientific EffectElectrostatic interaction: Electrostatics

Implementation Method 2

a hydrophobic surface is formed

Methodology Applied

Scientific EffectHydrophobic effect: Hydrophobe

Implementation Method 3

sealed the surface so that the so-called lotus effect could be observed

Methodology Applied

Scientific EffectSurface sealing: Coatings

Data Source

PatentUS20250115038A1Impregnated cellulose fibre-based sheet

Publication Date: 2025.04.10 NEENAH GESSNER GMBH

AI summary

Cellulose fiber-based sheets are provided herein. The sheets are particularly useful for insulation, construction and/or packaging material. A cellulose fiber-based sheet comprises a layer comprising untreated pulp impregnated with cationized vegetable wax. The cellulose fibers can be provided with a cationized vegetable wax thereby modifying the sheet to the extent that a hydrophobic surface is formed. The cationized vegetable wax attaches to the fluffy, fibrous surface of the sheet and seals the surface so that the so-called lotus effect is observed. The material is environmentally friendly, sustainable and imparts water repellence and a water vapour barrier to insulation materials, construction materials, packaging materials and the like.