Wet-Formed Paper Package Element for Complex Shapes
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Solution Overview
Problem
Existing paper-based packages for luxury and food products face limitations in achieving complex shapes due to the energy-intensive drying process of cardboard pulp and the inability of dry molding processes to form detailed angles or small features without tearing.
Innovation Solution
A package element made from a multilayer of wet-formed paper plies, pressed between 20-300°C, allowing for complex shapes without the need for glues and reducing energy consumption by eliminating the drying step, using a mechanical or hydraulic press to form the paper plies into a mold, and optionally adding humidifying and additive treatments for cohesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If cardboard pulp is used to make housing elements, then plastic use is eliminated and recyclability is improved, but the drying process requires high temperatures and consumes excessive energy
Solution Approach 1:
The patent changes the physical-chemical parameters of the paper pulp by maintaining it in a wet state during molding and skipping the traditional high-temperature drying step. The multilayer structure and pressing process are optimized to achieve the desired mechanical properties without complete drying, thereby reducing energy consumption while maintaining the plastic-free, recyclable advantage
Solution Approach 2:
The patent applies preliminary saturation of paper plies with water or additives before molding to ensure proper cohesion and forming. This preliminary preparation allows the material to be shaped effectively in the wet state, eliminating the need for subsequent high-energy drying processes
2Loss of time
If dry molding processes are used to make package elements, then production time is reduced, but the process cannot form detailed angles or small features without tearing
Solution Approach 1:
The patent transitions from dry molding to wet or partially wet molding processes, fundamentally changing the physical state parameter of the paper material. The wet state provides plasticity and flexibility that enables the formation of complex shapes, detailed angles, and small features without tearing, while the process time remains efficient due to optimized pressing and forming procedures
3Strength
If paper plies are pressed at high temperatures to form complex shapes, then structural integrity is improved, but energy consumption increases
Solution Approach 1:
The patent optimizes the temperature parameter by using moderate pressing temperatures (20-300°C as mentioned in the summary) rather than high-temperature drying. The multilayer construction and controlled pressing process compensate for the lower temperature to achieve sufficient structural integrity while minimizing energy consumption
Solution Approach 2:
The patent creates a composite structure through multiple paper plies bonded together with water or additives. This multilayer composite approach distributes mechanical stresses and achieves structural integrity through the layered architecture rather than relying on high-temperature processing
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 solution enables the creation of structurally intact package elements with complex shapes, reducing environmental and energy costs associated with plastic recycling and cardboard pulp processing, while maintaining recyclability and aesthetic appeal.
Implementation Method 1
pressed between 20-300°C, allowing for complex shapes without the need for glues
Implementation Method 2
pressed between 20-300°C
Implementation Method 3
optionally adding humidifying and additive treatments for cohesion
Data Source
AI summary
A package element for containing and exposing a product, having a seat shaped to accommodate a respective product, is described; the package element is obtained by forming a multilayer including paper plies made by a wet process, wherein the multilayer is formed by pressing in a mould at a temperature between 20° C. and 300° C.