Composite Ironing Plate Coating for Static Charge Dissipation
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Solution Overview
Problem
Triboelectric charging during ironing leads to static buildup on dielectric-coated ironing plates, causing increased adhesion between the plate and fabric, which results in poor gliding performance and potential fabric adherence due to the high resistivity of dielectric coatings, making it difficult to dissipate charges effectively.
Innovation Solution
A composite coating is applied to the ironing plate, comprising a dielectric layer with high surface resistance (>10^9 ohms) and a static dissipative layer with low surface resistance (<10^9 ohms) in direct contact with the fabric, allowing for easier dissipation of charges generated during ironing through the ironing plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dielectric coating is applied to the ironing plate to provide protection and low friction, then the coating provides aesthetic features, protection from corrosion/mechanical damage, and easy gliding on fabric, but the dielectric coating has high surface resistance (>10^9 ohms) which causes triboelectric charging to accumulate on the surface, increasing adhesion between the plate and fabric and reducing gliding performance
Solution Approach 1:
The coating is segmented into multiple functional layers: a bottom dielectric layer for protection and corrosion resistance, and a top conductive layer for charge dissipation. This segmentation allows each layer to perform its specific function without interfering with the other, resolving the contradiction between protection and gliding performance.
Solution Approach 2:
The invention uses a composite coating structure combining dielectric and conductive materials. The dielectric layer provides protection and low friction, while the conductive layer provides charge dissipation pathways. This composite approach allows the system to simultaneously achieve corrosion protection and maintain gliding performance by preventing static buildup.
2Reliability
If a dielectric coating is applied to the ironing plate surface, then the coating provides insulation and protection, but the high resistivity of the dielectric coating prevents effective dissipation of charges generated during ironing, causing static buildup and fabric adherence
Solution Approach 1:
The coating structure is segmented with the dielectric layer at the bottom for protection and insulation, and a conductive layer at the top for charge dissipation. This segmentation allows the dielectric layer to maintain its protective function while the conductive layer actively manages static charges, preventing harmful charge accumulation.
Solution Approach 2:
The conductive layer acts as an intermediary between the dielectric coating and the fabric. It provides a charge dissipation pathway that mediates the interaction between the insulating dielectric layer and the fabric, allowing charges to be safely conducted away before they can cause adhesion or static buildup issues.
3Reliability
If ironing is carried out with a metal ironing plate coated with dielectric coating, then the plate provides protection and aesthetic features, but triboelectric charging happens on the surface during friction with different fabrics, making charges hard to remove or dissipate due to the insulating nature of the dielectric coating
Solution Approach 1:
The coating is segmented into a protective dielectric bottom layer and a conductive top layer. This segmentation allows the dielectric layer to provide consistent protection and aesthetics across all fabric types, while the conductive top layer adapts to handle the varying triboelectric charging characteristics of different fabrics, ensuring charge dissipation regardless of fabric material.
Solution Approach 2:
The composite coating structure provides universal functionality for ironing different fabric types. The dielectric layer universally provides protection and aesthetics, while the conductive layer universally provides charge dissipation capability across all fabric types, making the ironing plate adaptable to various materials without compromising either protection or charge management.
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 static dissipative layer effectively dissipates charges to the ironing plate, reducing adhesion and improving gliding performance by providing a pathway for charge dissipation, unlike dielectric coatings which retain charges due to high resistivity.
Implementation Method 1
Triboelectric (or friction) charging happens when surfaces of two different material touch and separate from each other. The atoms of one material will often have a greater attraction for electrons than the other material
Implementation Method 2
the static dissipative layer having a surface resistance less than 10^9 ohms so that the charges generated on the static dissipative layer during ironing are more easily dissipated from the static dissipative layer through the ironing plate
Data Source
AI summary
The invention relates to a coated ironing plate comprising an ironing plate (4); and a composite coating (7) applied over the ironing plate (4). The composite coating comprises a dielectric layer (5) over the ironing plate (4) that has a surface resistance more than 109 ohms; and a static dissipative layer (6) for being in contact with a garment or fabric during ironing disposed on the dielectric layer (5) and in direct contact with the ironing plate (4). The static dissipative layer (6) has a surface resistance less than 109 ohms so that the charges generated on the static dissipative layer (6) during ironing are more easily dissipated from the static dissipative layer (6) through the ironing plate (4) compared to the dissipation of charges from the dielectric layer (5) through the ironing plate (4) in the absence of said static dissipative layer (6).