Recyclable Food Packaging With Segmented Adhesive Sealing
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Solution Overview
Problem
Existing packaging boxes require disinfection, which causes disinfectant to enter the cavity between the outer paper shell and inner membrane, leading to softening of the packaging paper and increased defective products, while also complicating recycling.
Innovation Solution
A packaging box design with a first adhesive part at the edge of the inner membrane for bonding with the outer paper shell, and a perforated line on the outer paper shell, along with a second adhesive part to prevent water vapor entry and facilitate easy separation during recycling, reducing adhesive use and environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the packaging box uses a cavity structure between outer paper shell and inner membrane, then recycling convenience is improved, but disinfectant enters the cavity causing paper softening and quality defects
Solution Approach 1:
The packaging box is divided into separate components: outer paper shell, inner membrane, and adhesive parts. The adhesive parts are segmented into first adhesive parts (for bonding) and second adhesive parts (for sealing). This segmentation allows the cavity to exist for recycling convenience while the second adhesive parts prevent disinfectant from entering the cavity, thus maintaining packaging quality.
2Strength
If the packaging box uses complete bonding between outer paper shell and inner membrane, then structural integrity is improved, but recycling becomes difficult
Solution Approach 1:
The bonding structure is segmented into first adhesive parts and second adhesive parts. The first adhesive parts provide bonding strength for structural integrity, while the second adhesive parts create sealed edges that prevent liquid penetration. This segmentation allows the packaging to maintain strength during use while enabling easy separation during recycling by targeting specific adhesive regions.
3Strength
If the packaging box uses more adhesive for bonding, then bonding strength is improved, but environmental friendliness and recyclability deteriorate
Solution Approach 1:
Different regions of the packaging structure have different adhesive qualities. The first adhesive parts use adhesive with bonding strength sufficient for structural integrity, while the second adhesive parts use adhesive optimized for sealing edges and preventing liquid penetration. This local differentiation ensures adequate bonding strength where needed while minimizing adhesive usage and environmental impact in other regions.
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
Prevents disinfectant from entering the cavity, maintains the integrity of the packaging box, and simplifies recycling by ensuring easy separation of the inner and outer components, thereby improving yield and environmental sustainability.
Implementation Method 1
the edge of the inner membrane includes a first adhesive part, the first adhesive part bonds with the outer paper shell
Implementation Method 2
the outer paper shell with a covering to cover the perforated line, such that the inner membrane does not need to be bonded with a second adhesive part
Data Source
AI summary
A packaging box includes an outer paper shell and an inner film. At least one edge of the inner film includes a first adhesive portion to be bonded with the outer paper shell. A perforation line or area is disposed on the outer paper shell. The inner film also includes a second adhesive portion, and the second adhesive portion surrounds the perforation line and bonds with the outer paper shell. A covering is disposed at the outside of the outer paper shell to cover the perforation line.