Expanded Slit Paper Padding With Embossed Rigidity for Protective Mailers
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Solution Overview
Problem
Existing packaging materials, such as plastic bubble and Kraft paper, fail to provide adequate cushioning while being cost-effective and lightweight, leading to increased shipping costs due to weight and material expenses.
Innovation Solution
A composite material using expanded slit sheet paper and embossed Kraft paper, where the embossed paper increases the rigidity of the expanded slit paper to inhibit deformation and provide cushioning, reducing the need for heavier materials and plastics, and allowing for recyclability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional void-fill packaging materials are used, then cushioning and void-fill functions are provided, but environmental pollution increases and material recovery is difficult
Solution Approach 1:
The patent transforms paperboard from a dense, non-expandable state to an expanded state with 50-90% air volume content through controlled expansion processes. This parameter change enables the material to provide cushioning and void-fill functions while being made from recyclable paperboard, resolving the contradiction between packaging performance and environmental pollution.
Solution Approach 2:
The patent utilizes phase transition of paperboard material from compact form to expanded form, creating a cellular structure that provides protective cushioning. This phase transition allows the same material to serve dual purposes: environmental friendliness through recyclability and functional performance through expanded structure.
2Ease of operation
If loose fill packaging materials are used, then void space is filled and items are secured, but materials scatter during shipping and handling
Solution Approach 1:
The patent segments the expanded paperboard into interconnected cellular structures that are contained within the packaging structure. The slit sheet configuration creates discrete yet connected cells that fill voids without scattering, providing both containment and proper distribution.
Solution Approach 2:
The expanded slit sheet material is nested within the packaging structure, with the material containing itself through its expanded cellular configuration. The slits create internal containment that prevents scattering while the overall structure nests within the packaging boundaries.
3Strength
If paperboard is expanded to create cushioning material, then protective function is improved, but manufacturing complexity increases
Solution Approach 1:
The patent combines the packaging structure creation and cushioning material formation into a single expansion process. The paperboard is expanded in-situ within the packaging structure, merging what would otherwise be separate manufacturing steps into one integrated operation.
Solution Approach 2:
The paperboard material serves dual functions: it forms both the packaging structure and the cushioning protection. The expansion process is self-contained, with the material expanding to fill and protect without requiring additional components or complex external systems.
4Loss of substance
If conventional packaging materials are used, then packaging functions are achieved, but material recovery and recycling are problematic
Solution Approach 1:
The patent changes the physical parameters of paperboard through expansion while maintaining its fundamental paperboard composition. This allows the material to achieve protective packaging performance through structural transformation rather than material substitution, preserving recyclability.
Solution Approach 2:
The expanded paperboard creates a composite structure combining paperboard fibers with trapped air in a cellular configuration. This composite structure provides cushioning performance comparable to traditional foam materials while maintaining the recyclability of the paperboard base material.
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 provides over 80% of the cushioning required for packaging while keeping the material lightweight and cost-effective, reducing shipping costs and environmental impact through recyclability, and enhancing handling security with embossed features.
Implementation Method 1
interior padding formed from a single sheet of paperboard that has been expanded to a degree sufficient to provide both cushioning and void-fill functions
Data Source
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AI summary
A protective product, such as, e.g., an envelope or pouch, is provided that includes at least one expanded slit paper sheet in an expanded state, and an embossed paper sheet facing the expanded slit paper sheet and fixed to the expanded slit paper sheet along at least a portion of a length in an expansion direction of the expanded slit sheet paper. In the preferred embodiments, the embossed paper sheet has a plurality of embossings that increase the rigidity of the embossed paper sheet, thereby inhibiting deformation of the embossed paper sheet that is fixed to the expanded slit sheet paper.