Insulating Protective Glove With Electrically Insulating Adhesive Seam
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Solution Overview
Problem
Current protective gloves fail to simultaneously meet the stringent standards for protection against thermal, mechanical, and electrical hazards, particularly when wet, due to inadequate connections between layers, leading to potential electrical hazards and limited effectiveness in firefighting and electrical vehicle-related incidents.
Innovation Solution
A multi-layer protective glove with a voltage-isolating inner lining and an outer shell connected via a self-contained, electrically insulating adhesive seam at the cuff, ensuring compliance with European Standards 659 and 60903, while preventing electrical conduction and providing thermal and mechanical protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If protective gloves combine multiple layers for thermal and mechanical protection, then thermal and mechanical protection is improved, but electrical insulation reliability deteriorates due to inadequate layer connections
Solution Approach 1:
An electrically insulating adhesive seam is introduced as an intermediary element between the outer shell and inner lining. This adhesive seam serves as a mediator that simultaneously provides mechanical bonding (maintaining layer connection under thermal and mechanical stress) and electrical insulation (preventing current penetration through the seam). The adhesive seam with minimum 0.5mm thickness acts as both a structural connector and an electrical barrier, resolving the contradiction between mechanical/thermal protection and electrical insulation reliability.
Solution Approach 2:
The protective glove employs a composite structure combining different materials with specific properties: the outer shell made of heat-insulating and flame-resistant material (meeting EN 659), the inner lining made of voltage-insulating material (meeting EN 60903), and the adhesive seam made of electrically non-conductive adhesive. This composite material approach allows each layer to fulfill its specific protective function while the electrically insulating adhesive seam ensures that the interfaces between layers do not compromise electrical insulation, thus achieving both thermal/mechanical protection and electrical insulation reliability.
2Reliability
If protective gloves meet stringent electrical insulation standards, then electrical hazard protection is improved, but thermal and mechanical protection capability deteriorates
Solution Approach 1:
The protective glove is segmented into distinct functional layers: an outer shell dedicated to thermal and mechanical protection (meeting EN 659), and an inner lining dedicated to electrical insulation (meeting EN 60903). Each layer is optimized for its specific protective function without compromising the other. The segmentation allows the outer shell to focus on thermal/mechanical properties while the inner lining focuses on electrical insulation, and the electrically insulating adhesive seam ensures that the segmentation does not create electrical vulnerabilities at the interfaces.
3Ease of manufacture
If adhesive seams are used to connect glove layers, then manufacturing ease is improved, but electrical insulation reliability deteriorates due to potential conductivity of adhesive material
Solution Approach 1:
The adhesive material is selected and configured with specific parameters: it must be electrically non-conductive and have a minimum thickness of 0.5mm. By changing the electrical properties (from conductive to non-conductive) and dimensional parameters (thickness ≥0.5mm) of the adhesive seam, it transforms from a potential electrical hazard into an effective electrical insulator. This parameter change allows the adhesive seam to simultaneously provide mechanical bonding (ease of manufacture) and electrical insulation (reliability), resolving the contradiction between manufacturing ease and electrical insulation reliability.
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 solution effectively meets all relevant safety standards, preventing electrical hazards and ensuring comprehensive protection against thermal, mechanical, and electrical risks, enhancing firefighter safety and operational effectiveness without the need for multiple glove types.
Implementation Method 1
the inner lining is connected to the outer shell via a circumferential, self-contained adhesive seam at the level of the glove cuff, and that the closed adhesive seam is electrically insulating even for voltages ≥ 1000V
Implementation Method 2
an outer shell and an inner lining, which are constructed in such a way that they together meet the minimum requirements of European Standard 659 for firefighter protective gloves
Implementation Method 3
the inner lining comprises a voltage-insulating electrician's glove which already meets the minimum requirements of European Standard 60903 for insulating protective gloves for work under electrical voltage
Data Source
Figure 1
AI summary
An insulating protective glove (1) for work under electrical voltage, designed as a finger glove with a glove body (2) and glove fingers (3) and having a front inner palm, a back glove back (4) and a cuff opening (5) at one end for inserting the hand into the finger glove, wherein the protective glove (1) is made of at least two layers and has an inner lining (12) that comes into contact with a user's hand during use and an outer shell (10) surrounding the inner lining (12) on the outside facing away from the hand, and wherein the outer shell (10) and the inner lining (12) are constructed in such a way that together they meet the minimum requirements of European Standard 659 for firefighter protective gloves.It is characterized by the fact that the inner lining (12) comprises a voltage-insulating electrician's glove, which in itself already meets the minimum requirements of European Standard 60903 for insulating protective gloves for work under electrical voltage, that the inner lining (12) is connected to the outer shell (10) via a circumferential, closed adhesive seam (11) at the level of the glove cuff, and that the closed adhesive seam (11) is electrically insulating even for voltages ≥ 1000 V. Thus, a protective glove can be provided that provides protection against both thermal and electrical hazards in accordance with the standard.