Cut-Resistant Gloves Using Composite Yarns 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 stiffness due to the brittleness and abrasiveness of bare glass fibers, and existing composite yarns, while providing protection, can still cause irritation when damaged during use.
Innovation Solution
A cut-resistant knit glove construction using a cut-resistant composite yarn with a glass fiber and para-aramid core wrapped with aliphatic polyamide or polyester yarn, a companion yarn for added protection and comfort, and a lining yarn with an elastomeric core wrapped with natural fibers, all co-knit to provide improved comfort and abrasion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If bare glass fiber is used in cut-resistant yarns to improve cut performance, then cut resistance is improved, but skin irritation and abrasion resistance worsen due to brittleness and skin abrasiveness
Solution Approach 1:
The patent combines glass fiber filaments with para-aramid fibers in a composite yarn structure. The glass fiber provides cut resistance while the para-aramid fibers reduce skin irritation and improve flexibility. This composite approach allows the yarn to maintain high cut performance while being more comfortable against the skin compared to bare glass fiber.
Solution Approach 2:
The para-aramid fibers act as an intermediary between the glass fiber filaments and the skin. They provide a softer interface with the skin while still contributing to the overall cut resistance of the yarn, effectively mediating between the harsh glass fiber and the sensitive skin.
2Strength
If fiberglass is used to improve cut resistance, then cut performance is improved, but abrasion resistance worsens because fiberglass is easily abraded
Solution Approach 1:
The composite yarn structure combines glass fiber with para-aramid fibers that have high abrasion resistance. This allows the yarn to maintain cut resistance from the glass fiber while gaining improved abrasion resistance from the para-aramid component, making the yarn more durable under normal use conditions.
3Object-affected harmful factors
If wrapped yarns with closely spaced helical wrappings are used to prevent skin irritation, then skin comfort is improved, but yarn stiffness increases
Solution Approach 1:
The composite yarn structure with glass fiber and para-aramid fibers provides skin comfort through the softer para-aramid component while maintaining flexibility. The natural flexibility of this composite structure reduces yarn stiffness compared to tightly wrapped yarns, improving dexterity and comfort.
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 200 denier (56 to 220 dtex) glass fiber filament yarn and at least one 100 to 600 denier (110 to 680 dtex) para-aramid yarn, the first wrapping yarn including at least one 20 to 300 denier (22 to 340 dtex) yarn selected from the group consisting of aliphatic polyamide, polyester, and mixtures thereof; b) companion yarn selected from the group consisting of aliphatic polyamide, polyester, and mixtures thereof; and c) lining yarn comprising a composite yarn of from 100 to 500 denier (110 to 560 dtex), the composite yarn having an elastomeric yarn core comprising at least one elastomeric yarn and at least one second wrapping yarn helically wrapped around the yarn core, the second wrapping yarn including at least one 20 to 300 denier (22 to 340 dtex) yarn selected from the group consisting of aliphatic polyamide, polyester, natural fibers, cellulosic fibers, and mixtures thereof; 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.