Cut-Resistant Gloves Using Composite Yarn to Reduce Skin Irritation
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Solution Overview
Problem
Cut-resistant gloves with glass filaments and para-aramid fibers face issues of skin irritation and abrasion due to the brittleness and stiffness of glass fibers, which are not adequately addressed by existing composite yarns that wrap glass fibers, leading to irritation during normal use.
Innovation Solution
A cut-resistant knit glove construction using a composite yarn with a core of glass fiber and para-aramid yarns helically wrapped with aliphatic polyamide or polyester yarns, combined with a companion yarn and a lining yarn, where the lining yarn is plated on the interior and the composite and companion yarns form the exterior, allowing for improved comfort and abrasion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If glass fiber filaments are used in composite yarns to provide cut resistance, then cut resistance is improved, but skin irritation and abrasion increase due to the brittleness and stiffness of glass fibers
Solution Approach 1:
The patent introduces a para-aramid fiber core as an intermediary between the glass fiber filaments and the skin. The para-aramid core provides flexibility and softness, mediating the harmful stiffness and brittleness of glass fibers while maintaining their cut-resistant properties. This core acts as a buffer that prevents direct skin contact with irritating glass fibers.
Solution Approach 2:
The patent creates a composite yarn structure combining three materials: glass fiber filaments (for cut resistance), para-aramid fiber core (for flexibility and comfort), and wrapping yarn (for structural integrity). This multi-material composite resolves the contradiction by integrating materials with complementary properties that individually address both cut resistance and skin comfort requirements.
2Object-affected harmful factors
If glass fiber filaments are tightly wrapped to prevent skin irritation, then skin irritation is reduced, but the yarn becomes stiff and abrasion resistance decreases
Solution Approach 1:
The patent applies different wrapping densities to different regions of the yarn structure. The para-aramid core provides a soft, flexible inner layer that contacts the skin, while the outer wrapping yarn provides structural protection. This local differentiation allows the inner portion to be soft and irritation-free while the outer portion maintains durability and abrasion resistance.
3Object-affected harmful factors
If para-aramid fibers are plated with cotton to improve comfort, then skin comfort is improved, but cut resistance and abrasion resistance are reduced
Solution Approach 1:
The patent uses a composite yarn structure where para-aramid fibers are combined with glass fiber filaments and wrapping yarn, rather than plating para-aramid with cotton. This composite approach maintains the high-strength properties of both para-aramid and glass fiber while the wrapping yarn provides structural integrity, avoiding the strength loss associated with cotton plating.
Data Source
Figure 1
AI summary
This invention relates to a cut-resistant knit glove comprising a) cut-resistant composite yarn having a core comprising at least two core yarns and at least one first wrapping yarn helically wrapped around the core, the core yarns including at least one 50 to 400 denier (56 to 440 dtex) glass fiber filament yarn and at least one 200 to 800 denier (220 to 890 dtex) para-aramid yarn, the first wrapping yarn including at least one 100 to 800 denier (110 to 890 dtex) yarn selected from the group consisting of aliphatic polyamide, polyester, and mixtures thereof; b) companion yarn of 200 to 1600 denier (220 to 1800 dtex) selected from the group consisting of aliphatic polyamide, polyester, natural fiber, cellulosic fiber, and mixtures thereof; and c) lining yarn comprising a composite yarn of from 500 to 1200 denier (560 to 1300 dtex) comprising aliphatic polyamide fiber, polyester fiber, natural fiber, cellulosic fiber, and mixtures thereof; and wherein the cut-resistant composite yarn, the companion yarn, and the lining yarn are co-knit in the glove with the lining yarn plated on the interior of the glove and the cut-resistant composite yarn and companion yarn forming the exterior of the glove.