Insulating Layer Prevents Electrostatic Discharge Damage in Garments
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Solution Overview
Problem
Clothing, particularly outer garments, suffer from unexplained small holes appearing in areas like the navel due to destructive electrostatic discharge (DED) caused by triboelectric charge generation between garments and metal components in contact with the wearer's body, with existing solutions failing to adequately address the issue.
Innovation Solution
The implementation of an insulating layer of high dielectric strength between metal components and the skin or outer garments to break the triboelectric charge circuit, or the use of a contact disrupting layer (CDL) on garments to reduce friction and charge generation, along with conductive paths to dissipate charges safely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal components are used in contact with the wearer's body, then the garment provides structural support and aesthetic features, but triboelectric charge generation occurs causing electrostatic discharge damage to the fabric
Solution Approach 1:
The patent applies an insulating layer as an intermediary substance between the metal component and the fabric. This layer prevents direct contact between the metal and fabric surfaces, thereby blocking the triboelectric charge generation pathway while preserving the metal component's structural function. The insulating layer acts as a mediator that eliminates the harmful electrostatic discharge effect without removing the beneficial structural support.
Solution Approach 2:
The patent extracts or removes the problematic direct contact interface between metal and fabric by applying an insulating coating on the metal surface. This extraction of the charge-generating contact mechanism allows the metal component to retain its structural and aesthetic functions while eliminating the source of triboelectric charge generation that causes fabric damage.
2Object-affected harmful factors
If insulating layer is applied to metal components, then electrostatic discharge damage is prevented, but the metal component's aesthetic appearance and conductivity may be compromised
Solution Approach 1:
The patent applies the insulating layer selectively on specific surfaces of the metal component where fabric contact occurs, rather than uniformly coating the entire component. This local application maintains the aesthetic appearance of visible metal surfaces while providing protection only where needed to prevent triboelectric charge generation at the fabric-metal interface.
Solution Approach 2:
The patent uses a thin film insulating layer that can conform to the metal component's shape and surface features. This thin film approach provides adequate insulation to prevent electrostatic discharge while minimizing impact on the visual appearance, as the thin coating is less noticeable than thicker insulating materials.
3Object-generated harmful factors
If contact disrupting layer is applied to garments, then friction and charge generation are reduced, but the garment's comfort and fit may be affected
Solution Approach 1:
The contact disrupting layer is applied locally at specific high-friction areas where fabric-on-fabric contact generates triboelectric charge, such as at the navel area or along seams. This localized treatment reduces charge generation at critical points while maintaining the natural feel and comfort of the rest of the garment fabric.
Solution Approach 2:
The contact disrupting layer is implemented as a thin, flexible coating that conforms to the garment's shape and moves with the wearer. This thin film approach reduces friction and charge generation without creating a noticeable barrier that would compromise comfort or the garment's fit against the body.
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
Prevents damage from electrostatic discharge by interrupting the triboelectric charge circuit and reducing charge buildup, thereby minimizing fabric damage and maintaining garment integrity.
Implementation Method 1
interposing an insulating layer of high dielectric strength at the conductor such that the conductor is insulated from either the skin of the wearer or the outer garment
Implementation Method 2
Static electrical charge can be generated when two surfaces in contact separate. By 'in contact' we mean in contact at the molecular level where in general the two surfaces are separated by a distance of less than 4 Angstrom Units. This phenomenon is called triboelectric charging or tribocharging and is caused by the stripping of free electrons (valence electrons or electrons in the outermost shell of a molecule) from one surface to the other when the surfaces separate.
Implementation Method 3
conductive paths to dissipate charges safely
Implementation Method 4
Corona discharge where the potential difference between the 2 surfaces (particularly at surface irregularities) is such that the dielectric strength of the gas between the surfaces is exceeded and charge flows back through a path of ionized gas.
Data Source
AI summary
A method and system for the prevention of Destructive Electrostatic Discharge (DED) damage to outer garments caused by triboelectric charge discharging to the wearer's body through a distinct point of discharge at a conductor in contact with or close proximity to the wearer's skin. The method consists of interposing an insulating layer of high dielectric strength at the conductor such that the conductor is insulated from either the skin of the wearer or the outer garment and the circuit of triboelectric charge through the conductor is broken. The system includes a conductor and an insulating layer positioned between the outer garment and the skin of the wearer on either side of the conductor.