Recyclable Bag With Removable Printed Label
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Solution Overview
Problem
Traditional film packaging bags with laminated polymer materials are difficult to recycle due to the lamination process, and printing ink on the bags can contaminate recycled products, making high-quality recycling challenging.
Innovation Solution
A film bag design with a label that covers one face panel, featuring a label seam extending over 40% to 98% of the vertical length, with tear lines adjacent to the label edges, allowing the printed portion to be torn off, leaving only scraps on the bag edges, and using a permanent label seam for secure attachment, while minimizing unconnected lengths to prevent accidental peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a lamination composite with multiple polymer materials is used for the bag walls, then high-quality appearance and good function properties are achieved, but homogeneous plastic recycling becomes impossible
Solution Approach 1:
The bag is divided into two separate components: a laminated bag body (front and back panels with side seams) and a separate label piece. The label is attached to the bag body via label seams but can be completely removed. This segmentation allows the bag body to maintain its high-quality laminated appearance while the label carries all printing, enabling the bag body to be recycled as unprinted plastic material.
Solution Approach 2:
The printing function is extracted from the bag body and transferred to a separate label piece. The label is completely removable from the bag body, leaving the bag body completely unprinted. This extraction allows the bag body to be recycled without contamination from printing ink, while the label retains all necessary product information and design elements.
2Loss of information
If printing is applied directly on the bag wall, then product information and graphical design are provided, but printing ink contaminates recycled products
Solution Approach 1:
The printing function is extracted from the bag body and transferred to a separate label piece. The label is completely removable from the bag body, leaving the bag body completely unprinted. This extraction allows the bag body to be recycled without contamination from printing ink, while the label retains all necessary product information and design elements.
Solution Approach 2:
The label acts as an intermediary carrier for all printing and product information. Instead of printing directly on the bag body, the label serves as a mediating element that delivers all graphical design and product information while being completely separable, thus preventing ink contamination of the recyclable bag body.
3Strength
If the label is secured by permanent label seams, then the label is securely attached to the bag, but the label cannot be easily removed for recycling
Solution Approach 1:
Tear lines are pre-formed in the label at strategic positions to guide complete separation. These pre-formed tear lines allow the label to be cleanly and completely removed from the bag body by simple tearing motion, ensuring full separation without leaving printed portions on the recyclable bag body.
Solution Approach 2:
The label is designed to be completely discarded after use by tearing it away along pre-formed tear lines. The complete removal capability ensures that no printed material remains on the bag body, allowing the bag body to be fully recovered for recycling as unprinted plastic material.
4Shape
If the label covers the entire face panel, then high-quality appearance is achieved, but the unconnected length between label and bag increases risk of accidental peeling
Solution Approach 1:
The label seam coverage is optimized to provide sufficient attachment strength at critical locations (side edges and bottom) while leaving the top edge unconnected to allow easy gripping for intentional removal. This local differentiation in connection quality provides both secure attachment during use and easy intentional removal when needed.
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 design enhances the bag's appearance and usability while facilitating easier recycling by ensuring the label can be peeled off completely, leaving the bag body unprinted and free of ink residues, thus enabling better material reuse.
Implementation Method 1
a tear line in the form of a weakening in the material adjacent each label seam
Implementation Method 2
permanent label seams to one of the wall panels
Data Source
AI summary
Front and back panels have side seams that fix the panel side edges of the front panel to the panel side edges of the back panel and each extend a full vertical length of the respective panel side edges. A label formed from a separate piece of film covers one of the face panels between the side edges thereof, is disconnected from the one face panel between the panel side seams, has label side edges generally at the respective side panel edges, and secures the label to the one face panel. Respective secondary side seams are provided between the side edges of the label and the side edges of the one panel, and respective tear lines are formed in the label closely adjacent and generally parallel to each of the label side edges. There is printing on the label only between the tear lines.