Linerless Label Coating With Detack Control for Waste-Free PSA Application
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Solution Overview
Problem
Existing pressure sensitive adhesive (PSA) label stocks generate significant waste due to the use of a liner and release system, with limited progress towards true linerless solutions that eliminate both components.
Innovation Solution
A method and system for manufacturing linerless labels by coating a pressure sensitive adhesive directly onto a roll of face stock, singulating individual labels, and applying them to products in a single continuous operation without winding or rewinding, and using a detack layer to render the adhesive non-tacky during storage and tacky upon application, eliminating the need for a release system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a liner and release system are used in PSA label stock, then the labels can be easily applied and stored, but significant waste is generated and costs increase
Solution Approach 1:
The patent removes the liner and release system from the label stock structure, retaining only the essential components: face stock, adhesive layer, and pressure-sensitive bonding capability. This extraction eliminates the waste stream while preserving the core labeling function through direct pressure-sensitive application.
Solution Approach 2:
The invention changes the adhesive properties by using a pressure-sensitive adhesive that remains tacky without a release system. The adhesive composition and bonding mechanism are modified to enable direct application through pressure alone, eliminating the need for thermal or chemical activation that would require a release liner.
2Loss of substance
If a liner-free label is manufactured with release system still coated on face-stock, then the liner is eliminated, but the full cost potential is not achieved and waste remains
Solution Approach 1:
The patent completely removes the release system from the label stock, not just the liner. This total extraction eliminates all associated costs and waste streams, achieving the full economic and environmental potential of linerless labeling by eliminating every component that does not contribute to the final label function.
3Loss of substance
If a true linerless solution is implemented, then waste is reduced and costs are lowered, but the adhesive must remain non-tacky during storage and become tacky upon application
Solution Approach 1:
The patent employs an adhesive that dynamically changes its tack properties: remaining non-tacky during storage to prevent blocking, and becoming tacky upon application through pressure, heat, or other activation. This dynamic behavior enables true linerless operation while maintaining adhesive control throughout the product lifecycle.
Solution Approach 2:
The invention utilizes changes in adhesive parameters (temperature, pressure, or other conditions) to control tack development. The adhesive composition is formulated to remain stable and non-tacky under storage conditions, then transitions to a tacky state when specific parameters are changed during the application process, enabling precise control without a release system.
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
Achieves a true linerless labeling process that reduces waste, lowers costs, and enhances material and supply chain efficiencies by eliminating both the liner and release system, while maintaining effective adhesion and application speed.
Implementation Method 1
coating a pressure sensitive adhesive to a roll of face stock
Data Source
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AI summary
According to an embodiment of the present disclosure, a method of labeling a plurality of products includes coating a pressure sensitive adhesive to a roll of face stock, the roll of face stock configured to be converted to a plurality of individual labels aligned in a single lane; singulating an individual label from the roll of face stock; and applying the individual label to a product of the plurality of products, wherein the coating, singulating and applying are conducted sequentially in a single continuous operation with a single continuous web of material.