Antistatic Coating on Paper Release Liner for Label Laminates
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Solution Overview
Problem
Label laminates with filmic faces and paper-based release liners experience electrical charging during printing and converting processes, leading to paper jams due to the attraction between the filmic face and the release liner.
Innovation Solution
An antistatic coating comprising a binder and an anti-blocking agent, such as amide wax, is applied to the release liner to reduce or eliminate static electricity, comprising a water-based acrylic binder and ethylene bis(stearamide) as the anti-blocking agent, which aids in neutralizing static charge and promoting adhesion to the paper substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a paper-based release liner is used with a filmic face, then the label laminate can be manufactured with common materials, but electrical charge builds up between the filmic face and release liner causing paper jams
Solution Approach 1:
An antistatic coating is applied to the paper-based release liner as an intermediary layer between the filmic face and the paper substrate. This coating mediates the electrical charge interaction by providing antistatic properties, preventing charge buildup that causes the filmic face to cling to the release liner during printing processes.
2Ease of operation
If the release liner surface is made smooth for easy handling, then handling efficiency improves, but static electricity builds up more easily
Solution Approach 1:
The surface properties of the release liner are modified by applying an antistatic coating that changes the electrical parameters of the surface. This coating reduces static electricity buildup while maintaining the smooth surface texture needed for easy handling during printing and converting processes.
3Productivity
If printing speed is increased to improve productivity, then output increases, but electrical charge builds up faster causing more frequent paper jams
Solution Approach 1:
The antistatic coating is applied in advance to the release liner before printing begins. This preliminary action prepares the surface to prevent electrical charge buildup from the outset, enabling higher printing speeds without the risk of paper jams that would otherwise occur at increased speeds.
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 antistatic coating effectively reduces static electricity, preventing paper jams and ensuring smoother printing processes by maintaining non-tackiness and stability during printing, allowing for higher yields and reduced material waste.
Implementation Method 1
an antistatic coating comprising a binder and an anti-blocking agent... effectively reduces static electricity, preventing paper jams
Implementation Method 2
ethylene bis(stearamide) as the anti-blocking agent, which aids in neutralizing static charge and promoting adhesion to the paper substrate
Data Source
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AI summary
This specification relates to a release liner (101, 201) for a label. Further, the specification relates to a label laminate (210), to its use as well as to a method of manufacturing the label laminate. The solution aims at reducing or eliminating build-up of static electricity on label laminates, especially during printing and converting processes. The release liner (101,201) comprises a paper-based substrate (102, 202), the paper-based substrate (102, 202) having a first surface (102a) and a second surface (102b). The first surface (102a) comprises a release coating (103, 203) and the second surface (102b) comprises an antistatic coating (104, 204). The antistatic coating (104, 204) comprises a binder and an antiblocking agent.