Recyclable Food Packaging Support with Segmented Weakening Line
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Solution Overview
Problem
Current food packaging methods fail to completely separate the cardboard sheet from the coating film during recycling, leading to non-recyclable materials due to the presence of paints and the design of existing weakening lines.
Innovation Solution
A method involving a weakening line with a series of perforations and connecting bridges is applied to the cardboard sheet before coating, allowing for easy separation of the cardboard from the coating film, ensuring both materials can be recycled.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a weakening line is created by perforation on the support to enable separation of the tongue from the remaining part, then the coating film can be detached, but a part of the sheet remains attached to the coating film making it non-recyclable
Solution Approach 1:
The weakening line is divided into multiple discrete perforations separated by connecting bridges, allowing the tongue to be detached from the remaining part while leaving the coating film intact on the separated portion, enabling complete recycling of both components
Solution Approach 2:
The weakening line with discrete perforations is created before coating the support with the coating film, so that when separation occurs, the coating film remains完整地 on one portion allowing both the sheet and film to be recycled separately
2Ease of operation
If a single continuous perforation is used to create the weakening line, then the tongue can be detached, but the edges of the portions are brought too close to the coating film causing partial detachment of the sheet
Solution Approach 1:
The continuous perforation is segmented into multiple discrete perforations separated by connecting bridges, which prevents the edges from being brought too close to the coating film and ensures clean separation without partial detachment of the sheet
3Ease of manufacture
If the weakening line is created after coating the support with the coating film, then the coating is complete, but the separation process becomes more difficult and less efficient
Solution Approach 1:
The weakening line with discrete perforations is created before applying the coating film, which allows the coating to be applied uniformly across the entire surface and enables faster, more efficient separation afterward without compromising coating completion
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 method enables the cardboard sheet to be completely and easily separated from the coating film, making both components recyclable and improving the recycling efficiency of food packaging materials.
Implementation Method 1
coating said first side with said film by means of an adhesive material interposed between said first side and said film
Data Source
Figure 1
Figure 2a~3c
AI summary
The present invention relates to a support to be used for packaging food products, which enables the recyclability of the materials of the support itself to be improved, in particular allowing the complete separation of the material that performs the function of sustaining the food product from the material intended to remain in contact with the food product.