Electrostatic Adsorption Laminate for Insulative Cloth Handling
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Solution Overview
Problem
Conventional electrostatic chucks fail to exhibit a strong adsorption force for highly insulative sheet-like objects such as cloth, due to the high volume resistivity of materials like polyimide films used as dielectric layers, which limits their ability to generate a sufficient electrostatic adsorption force.
Innovation Solution
A laminate sheet configuration with a resin film having a tensile modulus of 1 MPa or more and a volume resistivity of 1×10^10 to 1×10^13 Ω·cm, combined with a bipolar electrode layer, is used to generate an electrostatic adsorption force, where the resin film serves as the adsorption surface, and the electrode layer is composed of comb-like electrodes to enhance the adsorption force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrostatic chucks with high volume resistivity dielectric layers (e.g., polyimide films) are used, then insulation performance is improved, but adsorption force for highly insulative objects becomes insufficient
Solution Approach 1:
The dielectric layer is segmented into multiple layers with different volume resistivity values. The first dielectric layer has high volume resistivity (1×10^14 to 1×10^17 Ω·cm) for insulation, while the second dielectric layer has low volume resistivity (1×10^8 to 1×10^12 Ω·cm) for charge retention, resolving the contradiction between insulation and adsorption force
Solution Approach 2:
The patent uses a composite dielectric structure combining materials with different electrical properties. The first dielectric layer uses high-resistivity material for insulation, while the second dielectric layer uses low-resistivity material for charge retention, creating a composite system that achieves both insulation performance and strong adsorption force
2Ease of operation
If adhesive tapes are used for gripping sheet-like objects, then adsorption capability is improved, but operational complexity increases due to replacement and repositioning requirements
Solution Approach 1:
The patent replaces mechanical adhesive tapes with an electrostatic adsorption system that uses electrical fields to hold sheet-like objects. This eliminates the need for physical contact and chemical adhesion, allowing for easy activation and deactivation of adsorption without replacement or repositioning operations
3Force
If needle-based hooking methods are used for gripping objects, then adsorption strength is improved, but object damage risk increases
Solution Approach 1:
The patent replaces mechanical needle-based hooking with an electrostatic field-based adsorption system. This contactless method achieves strong adsorption forces without physical penetration or mechanical stress on the sheet-like objects, eliminating damage risks associated with needle methods
4Adaptability or versatility
If compressed air or negative pressure systems are used for gripping and peeling objects, then adsorption and release capability is improved, but device size increases due to compressor requirements
Solution Approach 1:
The patent replaces compressed air and negative pressure systems with an electrostatic field-based system. Adsorption is achieved by applying voltage to generate electrostatic forces, and release is achieved by simply removing the voltage. This eliminates the need for compressors, tanks, and complex pneumatic infrastructure, dramatically reducing device size while maintaining versatile adsorption and release capabilities
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 configuration allows for a higher adsorption force to be achieved for highly insulative sheet-like objects, enabling reliable adsorption and handling without physical means like adhesive tapes or needles, thus improving productivity in industries like apparel manufacturing.
Implementation Method 1
an object to be adsorbed is adsorbed using the resin film as an adsorption surface due to an electrostatic adsorption force that is generated by applying a voltage to the electrode layer
Data Source
AI summary
Provided is an electrostatic adsorption body capable of exhibiting a high adsorption force, especially with respect to a highly insulative sheet-like object to be adsorbed, such as a cloth, while using an electrical adsorption force. This electrostatic adsorption body, which uses electrostatic force to adsorb an object to be adsorbed, is provided with: a laminate sheet in which a 20-200 μm-thick insulator, a 1-20 μm-thick electrode layer, and a 20-200 μm-thick resin film are sequentially laminated; and a power supply device that applies a voltage to the electrode layer, wherein the resin film at least has a tensile modulus of 1 MPa or more and less than 100 MPa and a volume resistivity of 1×1010-1013 Ω cm, the electrode layer is composed of a bipolar electrode including a positive electrode and a negative electrode, and an object to be adsorbed is adsorbed using the resin film as an adsorption surface due to an electrostatic adsorption force that is generated by applying a voltage to the electrode layer.