Thin high cut seamless glove
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Solution Overview
Problem
Existing gloves with metallic fibers or yarns face challenges in maintaining flexibility and adhesion resistance, leading to poor durability and comfort due to issues with polymeric coating penetration and flexibility, necessitating a need for thin, abrasion-resistant, and cut-resistant gloves with improved manufacturing methods.
Innovation Solution
A thin coated supported glove design featuring a knitted liner with a tungsten core, polyamide wrapping yarn, and high-performance polyethylene wrapping yarn, coated with a thin polymeric layer using a nitrile-butadiene polymer emulsion, which is cured to achieve enhanced abrasion and cut resistance while maintaining flexibility and breathability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metallic fibers or yarns are included in the fabric liner to improve cut resistance, then cut resistance is improved, but flexibility and adhesion resistance deteriorate
Solution Approach 1:
The patent uses composite yarns combining metallic fibers (for cut resistance) with synthetic fibers (for flexibility and coating adhesion). This creates a multi-material structure where each component contributes its superior properties, resolving the contradiction between strength and ease of operation
Solution Approach 2:
The patent applies different treatments to different parts of the fabric liner. The metallic fiber content and coating application are optimized for specific high-risk areas (palm, fingers) rather than uniformly across the entire glove, allowing cut resistance where needed while maintaining flexibility in other regions
2Reliability
If the polymeric coating is applied to achieve robust adhesion, then adhesion resistance is improved, but the coating properties must be heavily balanced versus the knitted liner properties, complicating the manufacturing process
Solution Approach 1:
The patent systematically adjusts coating parameters (viscosity, solids content, application thickness) and fabric parameters (yarn denier, metallic content, knit density) to achieve optimal adhesion. This controlled parameter balancing simplifies the manufacturing process by establishing clear specification ranges
3Reliability
If thin yarn and small needles are used to create dense interstices to prevent coating penetration, then coating adhesion is improved, but the interstices become excessively dense limiting coating penetration, resulting in poor adhesion
Solution Approach 1:
The patent varies the knit density and interstices size in different regions of the glove. High-risk areas have denser construction for better coating adhesion, while other areas maintain appropriate openness for flexibility and comfort
Solution Approach 2:
The use of composite yarns with specific denier ranges creates optimal interstices that allow sufficient coating penetration while maintaining structural integrity and adhesion
4Reliability
If the interstices are made too open to allow coating penetration, then coating adhesion is improved, but the polymeric coating fully penetrates the article, limit flexibility, and lead to user-discomforting strike through
Solution Approach 1:
The patent optimizes the interstices opening size and coating viscosity to achieve controlled partial penetration. The coating penetrates sufficiently to bond with the substrate but not so much that it compromises flexibility or causes strike-through
Solution Approach 2:
Composite yarns with optimized fiber composition and denier create interstices with controlled dimensions that regulate coating penetration depth, ensuring adequate adhesion while maintaining garment flexibility
5Ease of operation
If a foamed polymeric coating is applied to impart flexibility and comfort, then flexibility and comfort are improved, but cut and abrasion resistance deteriorate due to the foamed structure
Solution Approach 1:
The patent applies foamed coating selectively in regions requiring flexibility (back of hand, fingers) while using non-foamed or minimally foamed coating in high-abrasion regions (palm, fingertips), optimizing both comfort and protection
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 provides gloves with significantly improved cut resistance (up to ANSI A7) and abrasion resistance (EN level 4), maintaining flexibility and breathability, and is lighter in weight compared to conventional gloves, with a thickness that balances durability and comfort.
Implementation Method 1
a thin polymeric coating adhered to the thin knitted liner
Implementation Method 2
the interstices of a knitted article may become excessively dense thus limiting the penetration of the polymeric coating
Implementation Method 3
applying an aqueous coagulant solution to the 21-gauge knitted liner
Implementation Method 4
curing the polymeric coating to form a thin coated support glove
Data Source
AI summary
A thin coated supported glove and method of making the glove includes a thin knitted liner, including a plurality of finger components, a thumb component, a backhand component, and a palm component, wherein the thin knitted liner comprises a covered yarn including a tungsten core having a diameter of about 25-35 micrometers, a polyamide wrapping yarn disposed upon the tungsten core, and a high performance polyethylene wrapping yarn disposed upon the polyamide wrapping yarn, wherein the covered yarn is (350) denier or less; a second yarn, wherein the second yarn is an intermingled yarn of (115) denier or less; and a thin polymeric coating adhered to the thin knitted liner.