Cellulose Wadding Deep-Drawing for Recyclable Formed Packaging

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Solution Overview

Problem

Existing packaging products, particularly those made of plastic or plastic substitutes, are difficult to recycle and have a significant carbon footprint, necessitating the development of recyclable and climate-neutral alternatives using renewable resources.

Innovation Solution

The use of multilayered cellulose wadding, produced through a deep-drawing process, where the inner layer has a higher moisture content than the outer layers, allowing the formation of packaging materials like trays and blisters from renewable materials.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If plastic or plastic substitute materials are used for packaging products, then durability and moisture resistance are improved, but recyclability deteriorates and carbon footprint increases

Engineering Contradiction:

Improvemoisture resistanceVSAvoidrecyclability

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent changes the material parameter from plastic to cellulose wadding, transforming the packaging material into a recyclable, climate-neutral alternative while maintaining functional performance through controlled moisture content and multilayer structure

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses multilayered cellulose wadding with different moisture contents in inner and outer layers, creating a composite structure that provides both moisture resistance and recyclability, eliminating the need for additional coatings

Inventive Principle:

Principle #40Composite materials

2Reliability

If additional coatings and surface sealants are applied to packaging materials, then moisture resistance is improved, but recyclability deteriorates

Engineering Contradiction:

Improvemoisture resistanceVSAvoidrecyclability

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent applies different moisture contents to different layers (higher in inner layers, lower in outer layers), creating local quality variations that provide moisture resistance where needed while maintaining overall recyclability of the packaging structure

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent uses uncoated cellulose wadding that is designed for single-use packaging applications, eliminating the need for durable coatings and sealants while maintaining adequate moisture resistance for the intended use period

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Use of energy by moving object

If thermal recycling through incineration is used for plastic packaging, then energy recovery is improved, but environmental harm increases

Engineering Contradiction:

Improveenergy recoveryVSAvoidenvironmental harm

Core Design Contradiction:

Use of energy by moving objectVSObject-generated harmful factors

Solution Approach 1:

The patent converts the previously harmful plastic packaging material into a beneficial recyclable cellulose-based material, transforming the waste stream from harmful incineration candidates into valuable recyclable resources that reduce carbon emissions

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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

This approach enables the production of high-quality, recyclable packaging products with minimal environmental impact, as they can be collected with paper waste and processed without the need for additional coatings, thus reducing carbon emissions.

Implementation Method 1

prior to forming, the moisture content of at least one inner layer is higher than the moisture content of the outer layers

Methodology Applied

Scientific EffectMoisture content gradient:

Implementation Method 2

a web or blank of cellulose wadding is hot- or cold-formed under pressure

Methodology Applied

Scientific EffectThermal forming: Heat Treatment

Implementation Method 3

formed under pressure

Methodology Applied

Scientific EffectCompression: Compression

Data Source

PatentEP4482663B1Use of at least one layer of cellulose wadding for the manufacture of transformed products

Publication Date: 2026.04.15 RAMTHUN ANDREAS

AI summary

According to the invention, to solve the problem of providing a recyclable and non-climate-damaging material for the manufacture of formed products, the use of at least single-layer cellulose wadding comprising cellulose in the form of a web or in the form of blanks for the manufacture of formed products is proposed.