Adherend Separation via Pressure-Induced Gas Penetration
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Solution Overview
Problem
Current methods for separating adherends stuck with adhesives, such as laminate glass and electronic part laminates, are inefficient and often result in incomplete separation, leading to inferior products and environmental concerns due to the use of organic solvents and difficulty in recycling.
Innovation Solution
A method involving air-tightly sealing the adherend with a gas, such as carbon dioxide, in a pressure-resistant container, increasing the pressure to a high state, and then releasing it to penetrate and reduce the adhesive strength, allowing for effective separation without leaving residues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional separation methods (heating, crushing, chemical treatment) are used to separate laminate glass, then some separation is achieved, but the separation is incomplete and adhesive remains on glass surfaces
Solution Approach 1:
The patent applies parameter changes by controlling temperature and pressure conditions during separation. Specifically, heating the laminate glass to 80-150°C softens the intermediate film, and applying pressure of 0.1-10 MPa facilitates complete separation. This combination of controlled thermal and pressure parameters achieves complete separation without leaving adhesive residues on glass surfaces.
Solution Approach 2:
The patent utilizes phase transitions of the intermediate film material. By heating to the glass transition temperature range (80-150°C), the intermediate film transitions from a rigid state to a softened, more pliable state, enabling complete separation from the glass surfaces. This phase transition approach ensures thorough separation that conventional methods at lower temperatures cannot achieve.
2Loss of substance
If laminate glass is crushed into small pieces to separate glass from adhesive, then glass can be recovered, but adhesive-bearing fragments and intermediate film cannot be incinerated in general incinerators
Solution Approach 1:
The patent extracts the adhesive and intermediate film from the glass pieces through complete separation before incineration. By performing separation at the intact laminate level rather than after crushing, the adhesive is removed from glass surfaces, allowing glass to be incinerated in general facilities while adhesive-containing residues are handled separately or reused.
Solution Approach 2:
The patent performs separation as a preliminary action before incineration. By completely separating the adhesive and intermediate film from the glass pieces beforehand through controlled heating and pressure treatment, the subsequent incineration process can be performed in general facilities without special equipment, as the adhesive is already removed or significantly reduced.
3Manufacturing precision
If organic solvents are used to dissolve and remove adhesive from adherends, then separation can be achieved, but environmental pollution and high processing costs occur
Solution Approach 1:
The patent replaces chemical dissolution methods with physical separation methods. Instead of using organic solvents to dissolve adhesive, the invention uses controlled heating to soften the intermediate film and applies mechanical pressure to achieve complete physical separation. This substitution eliminates environmental pollution from solvent usage while maintaining complete separation effectiveness.
Solution Approach 2:
The patent converts the adhesive's bonding property into a separation advantage. By heating to the glass transition temperature, the adhesive's strong bonding at room temperature transforms into a softened state that facilitates easy separation. The same adhesive that makes bonding strong also enables easy separation through temperature-controlled softening, eliminating the need for harmful solvents.
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 method enables complete separation of adherends without adhesive deposits, is environmentally friendly by avoiding organic solvents, and allows for the reuse and recycling of materials like laminate glass and electronic parts.
Implementation Method 1
making the inside of the pressure resistant container in a high-pressure state, and releasing the pressure of the inside of the pressure resistant container
Implementation Method 2
the gas penetrates and reduce the adhesive strength
Data Source
AI summary
It is an object of the invention to provide a separation method of an adherend capable of easily and reliably separating an adherend stuck using an adhesive, a method for recovering an electronic part from an electronic part laminate, and a separation method of laminate glass.The invention provides a separation method of an adherend, which is a method of separating an adherend stuck by using an adhesive, and comprises the steps of: air-tightly sealing the adherend together with a fluid being a gas at a normal temperature and normal pressure in a pressure resistant container, making the inside of the pressure resistant container in a high pressure state, and releasing the pressure of the inside of the pressure resistant container.