PVOH Release Liner for Recyclable Adhesive Articles
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Solution Overview
Problem
Traditional release liners coated with silicon-containing and fluorine-containing materials are not recyclable, leading to environmental concerns and potential interference with adhesion in adhesive products, causing contamination and printing issues.
Innovation Solution
Adhesive articles and methods that utilize a polyvinyl alcohol (PVOH) layer as a release agent instead of silicon-containing or fluorine-containing materials, allowing for recyclable release liners and a temporary, releasable bond between the backing material and substrate, with the PVOH layer dissolving to expose a permanent adhesive layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If silicon-containing and fluorine-containing materials are used as release agents in release liners, then the release liners can separate easily from the adhesive article, but the release liners become non-recyclable and cause environmental contamination
Solution Approach 1:
The patent changes the chemical composition parameters of the release agent by using polyvinyl alcohol (PVOH) instead of traditional silicon-containing and fluorine-containing materials. This parameter change maintains the release function while enabling recyclability and eliminating environmental contamination.
Solution Approach 2:
The patent employs a disposable release liner design where the release liner is intentionally made to be used once and then discarded. The release liner is designed to separate easily from the adhesive article during application, and its composition is optimized for easy disposal or recycling without environmental harm.
2Ease of operation
If silicon-containing and fluorine-containing materials are used as release agents, then the release liners provide effective release function, but material transfer to substrate interferes with adhesion and causes printing problems
Solution Approach 1:
The patent changes the chemical parameters of the release agent to polyvinyl alcohol, which has different surface properties and adhesion characteristics compared to silicon and fluorine materials. This change eliminates unwanted material transfer to the substrate while maintaining effective release function.
Solution Approach 2:
The PVOH layer acts as an intermediary between the release liner and the adhesive article. It provides the necessary release function during application but does not transfer to the substrate, thereby preventing adhesion interference and printing problems.
3Object-affected harmful factors
If a release liner is used to protect the adhesive layer, then contamination is prevented, but the release liner must be removed which requires additional steps
Solution Approach 1:
The patent extracts the protective function from a separate removable release liner and integrates it into the adhesive article structure itself. The PVOH layer is applied directly to the adhesive layer, providing protection while simplifying the overall application process.
Solution Approach 2:
The patent merges the release liner function with the adhesive article by applying the PVOH layer directly to the adhesive layer. This combination eliminates the need for a separate removable release liner while maintaining contamination protection.
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 PVOH layer enables recyclable adhesive articles, prevents contamination, and allows for repositioning of backing materials during application, ultimately providing a strong permanent bond without structural damage to the substrate or backing material.
Implementation Method 1
The PVOH layer is dissolved and provides a temporary bond to the substrate and the adhesive layer provides a permanent bond to a substrate
Data Source
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AI summary
The present subject matter provides an adhesive article having a release liner that is free of silicon-containing and fluorine-containing material, and related methods of adhering a backing material of the adhesive article to a substrate. The adhesive article utilizes an amorphous polyvinyl alcohol layer that facilitates removal of a release liner from an adhesive layer. Upon removal of the release liner, the amorphous polyvinyl alcohol layer remains disposed on the adhesive layer. A method of adhering the backing material to a substrate includes dissolving the amorphous polyvinyl alcohol layer and disposing the backing material to a substrate. During dissolution of the amorphous polyvinyl alcohol layer, a weak, temporary bond is formed between the substrate and the backing material. When the amorphous polyvinyl alcohol layer substantially dissolves and dries, the adhesive layer is exposed and forms a permanent bond with the substrate.