Adhesive Treatment Liquid for Separating Mixed Pressure-Sensitive Adhesives
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Solution Overview
Problem
Existing technologies are limited in their ability to recycle pressure-sensitive adhesive tapes with various kinds of adhesives, separate adhesives from base materials, and remove adhesive residues without damaging adherends or production devices, leading to environmental and operational challenges.
Innovation Solution
A pressure-sensitive adhesive treatment liquid with a Hansen solubility parameter value of 31 or less and an alkaline compound concentration of 0.001 wt% to 20 wt% is used to impregnate and treat pressure-sensitive adhesives, accompanied by stirring and ultrasonic treatment to facilitate separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If current recycling technologies are used to separate pressure-sensitive adhesive from base material, then separation is achieved, but the process is limited to specific adhesive compositions and cannot handle diverse adhesive types
Solution Approach 1:
The patent changes the chemical parameters of the treatment liquid by specifying a Hansen solubility parameter of 31 or less and alkaline compound concentration of 0.001-20 wt%, enabling the liquid to effectively treat various adhesive compositions including acrylic, rubber, and silicone-based adhesives without requiring different treatment processes for each adhesive type
Solution Approach 2:
The treatment liquid is designed with universal applicability to handle multiple adhesive types (acrylic, rubber, silicone, and other pressure-sensitive adhesives) through a single standardized process, eliminating the need for composition-specific treatment methods while maintaining process simplicity
2Loss of substance
If conventional waste treatment methods (burning or disposal) are used for pressure-sensitive adhesive tape waste, then waste removal is achieved, but environmental load increases
Solution Approach 1:
Instead of discarding adhesive tape waste through burning or landfill, the patent recovers the base material by separating it from the adhesive using the treatment liquid, enabling the base material to be reused and significantly reducing waste treatment requirements and environmental impact
Solution Approach 2:
The patent converts the previously harmful waste material (adhesive-coated base material requiring incineration or landfill) into a recoverable resource by using the treatment liquid to separate and remove the adhesive, transforming the waste stream into reusable base material and reducing environmental burden
3Productivity
If specific acrylic pressure-sensitive adhesive composition is designed for separation, then separation efficiency is improved, but the technology becomes applicable only to that specific composition
Solution Approach 1:
The patent optimizes the treatment liquid parameters (Hansen solubility parameter ≤31, alkaline compound concentration 0.001-20 wt%) to achieve high separation efficiency across diverse adhesive compositions, eliminating the need to design specific adhesive formulations for separation while maintaining productive separation performance
4Productivity
If pressure-sensitive adhesive adheres to production equipment, then production process continues, but cleaning becomes difficult and time-consuming
Solution Approach 1:
The patent converts the adhesive residue on equipment from a cleaning problem into a treatment target, using the same treatment liquid that separates adhesive from base material to efficiently remove adhesive from equipment surfaces, making cleaning easier and faster
Solution Approach 2:
The treatment liquid acts as an intermediary substance that facilitates the removal of adhesive from equipment surfaces by chemically interacting with the adhesive to reduce its adhesion properties, allowing easy removal without requiring intensive mechanical cleaning methods
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 treatment liquid effectively separates various adhesives from base materials and adherends, and removes adhesives from production devices, enabling easy recycling and reducing residue damage.
Implementation Method 1
a pressure-sensitive adhesive treatment liquid, which is a treatment liquid for a pressure-sensitive adhesive, including: a liquid having a Hansen solubility parameter value of 31 or less; and an alkaline compound
Implementation Method 2
an alkaline compound, wherein a concentration of the alkaline compound is from 0.001 wt % to 20 wt %
Implementation Method 3
including ultrasonic treatment for enhanced removal
Implementation Method 4
including ultrasonic treatment for enhanced removal
Data Source
AI summary
Provided are a pressure-sensitive adhesive treatment liquid, which can easily remove various kinds of pressure-sensitive adhesives, and a pressure-sensitive adhesive treatment method by which the various kinds of pressure-sensitive adhesives are easily removed. For example, when a pressure-sensitive adhesive tape including a base material and a pressure-sensitive adhesive is used as a treatment object, there are provided a pressure-sensitive adhesive treatment liquid, which can easily separate the base material and various kinds of pressure-sensitive adhesives from each other, and a pressure-sensitive adhesive treatment method by which the base material and the various kinds of pressure-sensitive adhesives are easily separated from each other. A pressure-sensitive adhesive treatment liquid according to an embodiment of the present invention is a treatment liquid for a pressure-sensitive adhesive, and includes a liquid having a Hansen solubility parameter value of 31 or less, and an alkaline compound. The concentration of the alkaline compound is from 0.001 wt % to 20 wt %.