Display-Device PSA Separation Using Steam Peeling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pressure-sensitive adhesives (PSAs) used in display devices, particularly in display devices with multilayer structures, face challenges in removability due to high adhesive strength and durability, leading to difficulties in separating components without causing damage, especially when adhesive strength increases over time.
Innovation Solution
A method involving the use of steam peeling to separate PSA-joined members in display devices, utilizing a hydrophilicity enhancer-containing PSA, where steam is applied to the bonding interface to facilitate quick and damage-free separation, even when traditional water-peeling methods fail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If PSA with high adhesive strength is used to ensure bonding reliability, then bonding strength is improved, but removability deteriorates
Solution Approach 1:
The patent applies preliminary action by introducing steam before performing the peeling operation. The steam is supplied to the PSA in advance to heat and plasticize it, reducing its adhesive strength and making subsequent removal easier. This preliminary heating action transforms the difficult peeling process into a manageable operation.
Solution Approach 2:
The patent employs parameter changes by altering the temperature and physical state of the PSA through steam supply. The steam heats the PSA, changing its viscosity and adhesive properties, thereby reducing bonding strength temporarily to enable easy removal while maintaining high bonding strength during the bonding phase.
2Duration of action of stationary object
If PSA is used for prolonged joining time, then bonding durability is improved, but removability deteriorates
Solution Approach 1:
The patent applies preliminary action by introducing steam before performing the peeling operation. The steam is supplied to the PSA in advance to heat and plasticize it, reducing its adhesive strength and making subsequent removal easier. This preliminary heating action transforms the difficult peeling process into a manageable operation.
Solution Approach 2:
The patent employs parameter changes by altering the temperature and physical state of the PSA through steam supply. The steam heats the PSA, changing its viscosity and adhesive properties, thereby reducing bonding strength temporarily to enable easy removal while maintaining high bonding strength during the bonding phase.
3Ease of operation
If traditional peeling methods are used on tightly bonded PSA, then removal is attempted, but peeling speed is slow and efficiency is low
Solution Approach 1:
The patent applies preliminary action by introducing steam before performing the peeling operation. The steam is supplied to the PSA in advance to heat and plasticize it, reducing its adhesive strength and making subsequent removal easier. This preliminary heating action transforms the difficult peeling process into a manageable operation.
Solution Approach 2:
The patent employs parameter changes by altering the temperature and physical state of the PSA through steam supply. The steam heats the PSA, changing its viscosity and adhesive properties, thereby reducing bonding strength temporarily to enable easy removal while maintaining high bonding strength during the bonding phase.
4Ease of operation
If forceful peeling is applied to remove tightly bonded PSA, then removal is achieved, but damage to members occurs
Solution Approach 1:
The patent applies preliminary action by introducing steam before performing the peeling operation. The steam is supplied to the PSA in advance to heat and plasticize it, reducing its adhesive strength and making subsequent removal easier. This preliminary heating action transforms the difficult peeling process into a manageable operation.
Solution Approach 2:
The patent employs parameter changes by altering the temperature and physical state of the PSA through steam supply. The steam heats the PSA, changing its viscosity and adhesive properties, thereby reducing bonding strength temporarily to enable easy removal while maintaining high bonding strength during the bonding phase.
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 steam peeling method effectively removes PSA from display device components, including thin and brittle materials like glass, without causing damage, and is efficient even when traditional peeling methods are ineffective.
Implementation Method 1
a step of peeling the PSA from the member by supplying steam towards the PSA
Implementation Method 2
a step of peeling the PSA from the member by supplying steam towards the PSA
Data Source
AI summary
To provide a separation method for a joined object for display device, by which PSA can be peeled off even when the PSA is tightly bonded to a member in the joined object. Provided is a method for separating a joined object for display device. In this method, the joined object comprises two members joined with a PSA comprising a hydrophilicity enhancer. The method comprises a step of peeling the PSA from the member by supplying steam towards the PSA.