Label Adhesive Channel Coating to Cut Usage and Leakage
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Solution Overview
Problem
Flood coating hot melt adhesive on label backsides requires excessive adhesive, increasing manufacturing costs and leads to adhesive leakage in warm environments.
Innovation Solution
A system and apparatus that vary hot melt adhesive coat weights on labels by using channels with different adhesive coat weights, including adhesive-free, reduced, and full coat weight areas, reducing adhesive usage and preventing leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If hot melt adhesive is flood coated on the backsides of labels, then high tack capability is achieved, but adhesive usage increases and manufacturing cost increases
Solution Approach 1:
The patent applies local quality by varying the adhesive coat weight across different regions of the label backside. High coat weight areas provide maximum tack for critical bonding zones, while reduced or zero coat weight areas eliminate unnecessary adhesive usage. This regional differentiation maintains overall label performance while reducing total adhesive consumption.
Solution Approach 2:
The label backside is segmented into multiple zones with different adhesive applications: first channels with no adhesive, second channels with reduced coat weight, and third channels with full flood coating. This segmentation allows each region to receive the appropriate amount of adhesive for its specific function, optimizing both performance and material efficiency.
2Strength
If hot melt adhesive is flood coated on the backsides of labels, then high tack capability is achieved, but adhesive leakage occurs in warm environments
Solution Approach 1:
By applying adhesive only in specific channels rather than flood coating the entire backside, the patent creates localized adhesive zones that maintain tack capability where needed while eliminating excess adhesive in areas prone to leakage. This local quality approach prevents adhesive from migrating to label edges in warm environments.
Solution Approach 2:
The patent extracts adhesive from areas where it is not needed (first channels with no adhesive) and reduces it in areas where less is required (second channels with reduced coat weight). This extraction of unnecessary adhesive eliminates the source of potential leakage while preserving bonding capability in critical zones.
3Quantity of substance
If varying adhesive coat weights are applied on label backsides, then adhesive usage is reduced and leakage is prevented, but manufacturing complexity increases
Solution Approach 1:
The patent employs a dynamic adhesive application system where the adhesive coat weight varies continuously or discretely across different channels on the label backside. This dynamic approach allows precise control of adhesive distribution, reducing overall usage while maintaining performance, and can be implemented through modern coating technology that manages the added complexity efficiently.
Data Source
AI summary
A label with varying degrees of adhesive coat weights is provided. A backside of the label includes first channel areas in which there is no adhesive. The backside of the label also includes second channel areas in which the adhesive is flood coated. Furthermore, the backside of the label includes third channels in which the adhesive is disposed in a coat weight that is less than what is achieved via flood coating.