Electrostatic Adsorbable Laminated Sheet Grip Layer Design

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Solution Overview

Problem

Existing electrostatic adsorbable sheets lack sufficient electrostatic adsorbability to adherends, leading to issues like paste residues and reduced adhesiveness, especially during handling and attachment processes.

Innovation Solution

Incorporating a novel grip layer with specific propylene and ethylene resin compositions between the label and support layers, enhancing electrostatic adsorbability and adhesiveness, and optimizing surface properties to improve handleability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If conventional adhesives, adhesive tapes, or double-stick tapes are used for attaching sheets, then attachment can be achieved, but paste residues remain on the adherend or coating comes off upon peeling

Engineering Contradiction:

Improveattachment processVSAvoidpaste residues

Core Design Contradiction:

Ease of manufactureVSObject-generated harmful factors

Solution Approach 1:

The patent replaces the chemical adhesive bonding system with an electrostatic adsorption system. The electrostatic adsorbable sheet uses electrostatic forces between charged particles to attach to the adherend, eliminating the need for paste adhesives that leave residues. This substitution of the bonding mechanism fundamentally resolves the issue of paste residue generation while maintaining effective attachment capability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of manufacture

If conventional adhesives are used for sheet attachment, then attachment is achieved, but coating on the adherend surface comes off upon peeling

Engineering Contradiction:

Improveattachment processVSAvoidcoating damage

Core Design Contradiction:

Ease of manufactureVSObject-generated harmful factors

Solution Approach 1:

The patent replaces chemical adhesive bonding with electrostatic adsorption, which exerts gentler forces on the adherend surface. The electrostatic field distributes attachment forces more uniformly without the concentrated stress points that chemical adhesives create, thereby preventing coating delamination during peeling while maintaining secure attachment.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Object-generated harmful factors

If electrostatic adsorbable sheets are used, then paste residues and coating damage are reduced, but electrostatic adsorbability to adherend is insufficient

Engineering Contradiction:

Improvepaste residuesVSAvoidelectrostatic adsorbability

Core Design Contradiction:

Object-generated harmful factorsVSReliability

Solution Approach 1:

The patent modifies the electrostatic properties of the sheet by controlling the charge density, charge distribution, and surface properties of the electrostatic adsorbable layer. By optimizing these parameters, the sheet achieves sufficient electrostatic adsorbability to reliably attach to adherends while maintaining the advantages of minimal residue and coating damage.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs a composite structure consisting of multiple layers including the electrostatic adsorbable layer, support layer, and optionally a pressure-sensitive adhesive layer. This composite design combines electrostatic adsorption with mechanical support and enhanced adhesion, achieving reliable overall attachment performance while preserving the residue-free benefit of electrostatic bonding.

Inventive Principle:

Principle #40Composite materials

4Ease of operation

If electrostatic adsorbable sheets are used, then attachment position is adjustable, but adhesiveness at the electrostatic adsorbable interface is insufficient

Engineering Contradiction:

Improveattachment position adjustmentVSAvoidadhesiveness

Core Design Contradiction:

Ease of operationVSStrength

Solution Approach 1:

The patent combines the electrostatic adsorbable layer with a pressure-sensitive adhesive layer in a composite structure. The electrostatic layer provides adjustable positioning and initial attachment, while the pressure-sensitive adhesive layer provides enhanced bonding strength at the interface. This composite approach maintains the operational flexibility of electrostatic bonding while supplementing it with mechanical adhesion for sufficient overall strength.

Inventive Principle:

Principle #40Composite materials

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 enhanced electrostatic adsorbable laminated sheet achieves improved adsorbability, reduced paste residues, and increased adhesiveness, resulting in better handleability and attachment performance.

Implementation Method 1

a label layer, a support layer, and a grip layer disposed between the label layer and the support layer, wherein the label layer and the support layer are electrostatically adsorbed to each other via the grip layer

Methodology Applied

Scientific EffectElectrostatic adsorption: Electrostatics

Data Source

PatentUS11148393B2Electrostatic adsorbable laminated sheet and display material

Publication Date: 2021.10.19 YUPO CORP

AI summary

It is intended to provide an electrostatic adsorbable laminated sheet which is less likely to cause paste residues, etc. upon peeling from an adherend, exhibits further enhanced adsorbability to an adherend, additionally exhibits enhanced adhesiveness at an electrostatic adsorbable interface, and thereby has enhanced handleability. Electrostatic adsorbable laminated sheet includes label layer, support layer, and grip layer disposed between the label layer and the support layer, wherein the label layer and the support layer are electrostatically adsorbed to each other via the grip layer.