Variable-Density Air-Laid Blank for 3D Protective Packaging
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Solution Overview
Problem
Existing 3D shaped products made from foamed polymers like EPS have limited shock absorbing and thermal insulation capabilities, and there is a need for more sustainable alternatives that can protect packaged goods during transport and storage.
Innovation Solution
Air-laid blanks comprising at least 70% natural fibers and 2.5-30% thermoplastic polymer binder, with varying densities and porosities, are produced and shaped using hot pressing to create 3D products with enhanced shock absorption and thermal insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If foamed polymer materials like EPS are used for cushioning and thermal insulation, then shock absorption and thermal insulation properties are achieved, but environmental sustainability deteriorates
Solution Approach 1:
The patent changes the material composition parameters by using natural fibers (at least 70% by weight) combined with thermoplastic polymer binders (2.5-30% by weight), replacing traditional foamed polymers. This parameter change maintains the required cushioning and insulation properties while improving environmental sustainability.
Solution Approach 2:
The patent creates a composite material structure combining natural fibers with thermoplastic polymer binders. This composite approach allows the material to achieve both shock absorption/thermal insulation properties and environmental sustainability, as the natural fibers provide the bulk structure while the polymer binders provide cohesion and functional properties.
2Object-affected harmful factors
If natural fibers are used to replace foamed polymers, then environmental sustainability is improved, but shock absorption and thermal insulation capabilities deteriorate
Solution Approach 1:
The patent optimizes the concentration parameters of natural fibers (at least 70% by weight) and thermoplastic polymer binders (2.5-30% by weight) to achieve the desired balance between environmental sustainability and functional performance. This parameter optimization ensures that the natural fiber-based material meets or exceeds the shock absorption and thermal insulation capabilities of traditional foamed polymers.
Solution Approach 2:
The composite structure of natural fibers combined with thermoplastic polymer binders allows the material to simultaneously achieve environmental sustainability and reliable shock absorption/thermal insulation properties. The natural fibers provide the porous structure for insulation while the polymer binders ensure structural integrity and cushioning capability.
3Reliability
If air-laid blanks with varying densities are produced, then shock absorption performance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies local quality variation by creating air-laid blanks with different density portions. This allows different regions of the material to have optimized properties for specific functions - denser regions for structural support and lighter regions for enhanced cushioning. The local quality approach improves shock absorption performance while maintaining manageable manufacturing complexity through controlled variation rather than complete homogeneity.
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 resulting 3D products provide excellent cushioning and thermal insulation while being environmentally friendly, suitable for protecting goods against impact and maintaining temperature integrity.
Implementation Method 1
heating the natural fibers and the thermoplastic polymer binder and/or the mixture to form an air-laid blank
Implementation Method 2
transporting the natural fibers and the thermoplastic polymer binder and/or the mixture to a lower end of the forming head by vacuum applied over an air-permeable collector
Implementation Method 3
The resulting 3D products provide excellent cushioning and thermal insulation while being environmentally friendly, suitable for protecting goods against impact and maintaining temperature integrity
Implementation Method 4
These can be made from different materials but are typically made from a foamed polymer... provide excellent cushioning and thermal insulation while being environmentally friendly, suitable for protecting goods against impact
Data Source
AI summary
An air-laid blank (10) comprises natural fibers at a concentration of at least 70% by weight of the air-laid blank (10) and a thermoplastic polymer binder at a concentration selected within an interval of from 2.5 up to 30% by weight of the air-laid blank (10). The air-laid blank (10) has an average density and a portion (11) of the air-laid blank (10) has a density different from the average density. The air-laid blank (10) is produced by modifying the air-permeability of a portion (121) of an air-permeable collector (120) to form a portion (11) of the air-laid blank (10) having a density from the average density. The air-laid blank (10) has two parallel planar major surfaces (12, 14).