Linerless Label Adhesive Water-Soluble Coating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for producing linerless labels face challenges in eliminating the need for a release liner, leading to increased costs, complexity, and environmental waste, while also restricting decorative options and failing to achieve commercial success due to issues with adhesive haze and inefficient singulation.
Innovation Solution
A method involving a water-soluble coating replaces the silicone-coated liner, allowing for the partial removal of the coating to expose the adhesive, enabling die-cutting from the face material side and facilitating label separation without a carrier web, while maintaining cohesion for application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a silicone-coated release liner is used in traditional label material, then the label can be easily removed from the liner during dispensing, but the liner becomes a waste stream that increases cost and environmental impact
Solution Approach 1:
The invention extracts and eliminates the release liner component from the traditional label material structure. By using a self-wound label material where the adhesive remains tacky at room temperature, the liner is completely removed from the system, eliminating the waste stream while maintaining ease of label removal through the inherent properties of the adhesive system.
Solution Approach 2:
The invention replaces the expensive and wasteful silicone-coated release liner with a simple, cost-effective adhesive system that does not require a liner. The adhesive is formulated to be non-tacky at room temperature during storage and handling, but becomes sufficiently tacky at application temperature, eliminating the need for a disposable liner component.
2Loss of substance
If activatable labels with specialty coatings are used to eliminate the liner, then the waste stream is reduced, but the cost increases due to expensive components and additional process steps
Solution Approach 1:
The invention uses a simple, cost-effective adhesive formulation without expensive specialty coatings or activatable mechanisms. The adhesive is directly applied to the label face material and remains stable during storage and handling, eliminating the need for complex coating systems while maintaining linerless operation.
Solution Approach 2:
The adhesive system is self-sufficient and does not require external activation mechanisms, specialty coatings, or additional process steps. The adhesive's tack properties are inherently controlled by temperature and formulation, allowing it to remain non-tacky during storage and become tacky only at application temperature, eliminating the need for separate activation processes.
3Loss of substance
If the adhesive is made non-tacky at room temperature to enable linerless operation, then the liner and release system are eliminated, but the adhesive becomes hazy and restricts clear-on-clear label options
Solution Approach 1:
The invention modifies the adhesive's physical and chemical parameters through formulation adjustments that maintain transparency while controlling tack properties. By changing the adhesive composition and curing characteristics, the system achieves both linerless operation and optical clarity, enabling clear-on-clear label applications.
Solution Approach 2:
The invention uses a composite adhesive formulation that combines multiple components to achieve both non-tacky storage properties and optical transparency. The adhesive system integrates polymer resins, curatives, and other additives in specific proportions to maintain clarity while providing the necessary tack control for linerless operation.
4Productivity
If traditional die-cutting is performed on adhesive-backed label material, then individual labels are produced, but the adhesive exposes and causes blocking during winding and handling
Solution Approach 1:
The invention performs preliminary protection of the adhesive by maintaining it in a non-tacky state during storage and handling through controlled formulation and curing. This preliminary action prevents blocking before it occurs, allowing efficient die-cutting and handling without requiring additional protective measures.
Solution Approach 2:
The invention changes the adhesive's physical state parameters through temperature and formulation control. The adhesive is formulated to remain non-tacky at room temperature during manufacturing and handling, then becomes sufficiently tacky at application temperature, enabling efficient production while preventing blocking issues.
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 approach reduces production costs, eliminates waste, and enhances decorative options by allowing for thinner face materials and lower adhesive coat weights, while ensuring effective label separation and application without compromising the label's appearance or performance.
Implementation Method 1
A method involving a water-soluble coating replaces the silicone-coated liner, allowing for the partial removal of the coating to expose the adhesive
Data Source
AI summary
A method of applying a linerless label to an article wherein a web of joined labels is die cut from a web of label material in which the adhesive is protected by a water-soluble coating which provides a cushion between an anvil and die cutting means. The water-soluble coating is at least partially removed by exposure to water in a press following die-cutting, in a label applicator, or in an off-line unit. The web of joined labels may be wound and unwound between each of the above options. The web of joined labels may be separated in a label applicator by breaking a weakened boundary between adjoining labels or by cutting at a boundary between the label and the adjoining label. The linerless label may contain anti-counterfeit means that may be subsequently identified overtly and/or covertly.