Tray-Lid Packaging With Edge-Only Adhesive Bonding
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Solution Overview
Problem
Existing packaging methods require excessive packaging material, involve costly recycling due to high adhesive and silicone content, and are inefficient in producing labels with complex shapes or without silicone traces.
Innovation Solution
A packaging design featuring a self-adhesive label with adhesive applied only along the edge, allowing reliable adhesion to a tray edge, reducing adhesive and silicone use, and enabling recyclable materials with minimal waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive is applied over the entire surface of labels to ensure firm attachment, then labeling reliability is improved, but the proportion of adhesive and silicone material increases, making recycling difficult and costly
Solution Approach 1:
The patent applies adhesive only to the circumferential edge area of the label (approximately 1-5 mm wide band around the perimeter) rather than the entire surface. This localized adhesive application provides sufficient attachment reliability for sealing the packaging while dramatically reducing the total amount of adhesive and silicone coating material used, thereby improving recyclability.
2Quantity of substance
If linerless label rolls are used to reduce packaging material, then material usage is reduced, but label separation can only be done on the labeling machine and only straight-cut labels can be produced
Solution Approach 1:
The patent uses a carrier band that is segmented or divided into individual label sections. This allows labels to be separated from the carrier band in advance (before the labeling machine) using various cutting methods including straight cuts, curved cuts, and complex shapes. The carrier band structure enables both material reduction and production flexibility simultaneously.
3Productivity
If labels are separated in advance from the carrier band, then production time is reduced, but the carrier band with high silicone content cannot be recycled as monomaterial
Solution Approach 1:
The silicone coating on the carrier band is applied locally only in the areas where labels will be attached, rather than covering the entire carrier band surface. This localized coating approach allows the majority of the carrier band material to remain as pure, recyclable material while still providing sufficient silicone for label attachment in the specific regions where it is 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
The solution results in sustainable, cost-effective packaging with reduced material usage, easy recyclability, and the ability to produce labels in various shapes without silicone traces, ensuring stable and stackable packaging.
Implementation Method 1
a self-adhesive label with adhesive applied exclusively circumferentially in the area of a label edge to be adhered to the tray edge
Data Source
AI summary
The disclosure relates to a packaging which comprises a packaging lower part, which is in the form of a packaging tray with a tray edge projecting circumferentially, and a lid part which is adhesively bonded to the tray edge. The lid part comprises a self-adhesive label which is removed from a carrier band and to the underside of which adhesive is applied exclusively circumferentially in the region of a label edge to be adhered to the tray edge. Furthermore, the disclosure relates to a method for producing a packaging.