Conductive Adhesive Composite for Curved Surface Bonding

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Solution Overview

Problem

Adhesive bodies such as electrically conductive adhesive sheets or tapes struggle to apply to complex shapes like curves or uneven surfaces, and existing electrically conductive composites with threadlike members lack adequate electrical conductivity and adhesion strength.

Innovation Solution

A composite comprising an elongated adhesive body and an electrically conductive threadlike member, where the threadlike member is not insulated, and can be spirally attached or twisted with the adhesive body, providing excellent adhesion and electrical conductivity in multiple directions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If an adhesive body such as an electrically conductive adhesive sheet or tape is used, then adhesion strength is provided, but electrical conductivity is insufficient

Engineering Contradiction:

Improveadhesion strengthVSAvoidelectrical conductivity

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The patent combines an adhesive body with an electrically conductive threadlike member to create a composite that simultaneously provides both adhesion strength and electrical conductivity. The adhesive body maintains bonding capability while the conductive threadlike member embedded within or attached to it ensures reliable electrical conduction, resolving the contradiction between adhesive performance and electrical conductivity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The invention creates a composite structure integrating an adhesive body with an electrically conductive threadlike member. This composite material approach allows the system to exhibit both adhesive properties from the adhesive body and electrical conductive properties from the threadlike member, simultaneously satisfying both requirements that were previously mutually exclusive.

Inventive Principle:

Principle #40Composite materials

2Strength

If an adhesive body is used for bonding, then adhesion is achieved, but applicability to complicated shapes such as curves or unevenness is difficult

Engineering Contradiction:

ImproveadhesionVSAvoidapplicability to complicated shapes

Core Design Contradiction:

StrengthVSAdaptability or versatility

Solution Approach 1:

The patent employs a threadlike member structure that inherently possesses flexibility, allowing it to conform to curved surfaces and complicated shapes. The thin, flexible nature of the threadlike member enables it to adapt to unevenness and complex geometries while maintaining adhesive contact, thereby improving applicability to complicated shapes without sacrificing adhesion strength.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The composite structure allows the threadlike member to dynamically adapt its shape and configuration to match the underlying surface topology. This dynamic adaptability enables the adhesive composite to effectively bond to curved surfaces and complicated shapes by conforming to their geometry while maintaining bonding integrity.

Inventive Principle:

Principle #15Dynamics

3Strength

If threadlike members are bundled using an elongated adhesive body, then bundling is achieved, but electrical conductivity in circumferential direction is insufficient

Engineering Contradiction:

Improvebundling capabilityVSAvoidelectrical conductivity in circumferential direction

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The patent transitions from conventional planar adhesive sheets to a three-dimensional composite structure where the electrically conductive threadlike member is integrated within or attached to the adhesive body in multiple orientations. This dimensional integration ensures electrical conductivity not only in the longitudinal direction but also in the circumferential direction, resolving the conductivity insufficiency while maintaining bundling capability.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The invention strategically positions electrically conductive threadlike members within the adhesive body at specific locations and orientations to ensure circumferential electrical conductivity. By locally enhancing the conductive properties where needed, the composite achieves reliable electrical conduction in the circumferential direction while preserving the overall bundling function of the adhesive body.

Inventive Principle:

Principle #3Local quality

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 composite achieves superior adhesion strength and electrical conductivity in the longitudinal and circumferential directions, enabling effective bonding and application to complex shapes like curves and narrow regions.

Implementation Method 1

an adhesive body such as an electrically conductive adhesive sheet or an electrically conductive adhesive tape having adhesiveness and electrical conductivity to an adherend

Methodology Applied

Scientific EffectAdhesion: Adhesive

Implementation Method 2

favorable electrical conductivity in a longitudinal direction of the composite and 360° in a circumferential direction

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS20240186032A1composite

Publication Date: 2024.06.06 NITTO DENKO CORP

AI summary

The present invention relates to a composite that has excellent adhesion strength and favorable electrical conductivity in a longitudinal direction of the composite and 360° in a circumferential direction (directions of a Y-axis and a Z-axis) with respect to the longitudinal direction as an axis (X-axis). The composite includes an elongated adhesive body and an electrically conductive threadlike member.