Thin coated supported glove
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Solution Overview
Problem
Existing coated gloves face challenges in achieving a balance between flexibility, durability, and adhesion due to the limitations of yarn denier and needle gauge, leading to issues with polymeric coating penetration and breathability, with thin coatings being prone to wear and not providing adequate flexibility or abrasion resistance.
Innovation Solution
A 21-gauge knitted liner with a thin polymeric coating using a 20 denier or less core yarn and a 30 denier or less intermingled or wrapping yarn, combined with a 40-46 PHR nitrile-butadiene polymer formulation, applied via an aqueous coagulant and dipping process to achieve a thin, flexible, and durable glove.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a thinner yarn is used to reduce glove thickness and increase flexibility, then flexibility and weight are improved, but the interstices become excessively dense limiting polymeric coating penetration resulting in poor adhesion
Solution Approach 1:
The patent changes the physical-chemical parameters of the polymeric coating formulation, specifically using a lower viscosity coating composition that can penetrate the dense interstices of thin yarn knitted liners while maintaining adhesion. This parameter change allows the coating to effectively reach and bond with the yarn surfaces even when the interstices are tightly spaced.
Solution Approach 2:
The patent introduces an intermediary mechanism by using a specific formulation approach where the coating composition acts as a mediator that can navigate through the dense yarn structure. The coating formulation includes components that facilitate penetration through tight interstices while ensuring proper adhesion to the yarn surfaces.
2Strength
If a thicker coating is applied to improve durability and abrasion resistance, then strength is improved, but the glove becomes less flexible and heavier
Solution Approach 1:
The patent changes the parameters of the coating formulation to achieve higher strength properties through improved adhesion and molecular structure rather than increased thickness. The coating composition is formulated to provide maximum durability at minimal thickness, maintaining glove flexibility while achieving superior abrasion resistance.
Solution Approach 2:
The patent uses composite material principles by formulating a polymeric coating with specific compositional ratios that combine different polymer components to achieve enhanced mechanical properties. This composite formulation provides superior strength and abrasion resistance without requiring a thick coating layer.
3Reliability
If a 15-gauge knitted liner with thick coating is used to manufacture a robust coated glove, then durability is improved, but the glove becomes heavier and less flexible
Solution Approach 1:
The patent changes multiple parameters simultaneously: using thinner yarn (20 denier or less), higher gauge knitting (21-gauge needles), and optimized coating formulation. This combination of parameter changes achieves durability through superior coating adhesion and material properties rather than increased mass, resulting in a lighter yet durable glove.
Solution Approach 2:
The patent adopts a philosophy of using minimal material thickness to achieve the required performance, effectively creating a 'thin but durable' product that replaces the traditional thick, heavy construction. The optimized thin coating and thin liner combination provides adequate durability without the excess weight of traditional designs.
4Volume of moving object
If smaller diameter yarn is used to create a thinner liner, then weight and thickness are reduced, but the interstices become too dense preventing adequate coating penetration
Solution Approach 1:
The patent changes the viscosity parameter of the coating composition to a lower range that enables penetration through the dense interstices created by small diameter yarn. This parameter adjustment ensures that the coating can effectively reach and coat the yarn surfaces even when the knitted structure has tightly spaced interstices.
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 results in a thin, flexible, and durable glove with improved adhesion and breathability, achieving EN388 level 4 Abrasion resistance without being foamed, maintaining flexibility and preventing strikethrough, while being lighter than traditional gloves.
Implementation Method 1
the interstices of the knitted article may become excessively dense thus limiting the penetration of the polymeric coating
Implementation Method 2
applying an aqueous coagulant solution to the 21-gauge knitted liner
Data Source
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Figure 5
AI summary
A thin coated supported glove (400), having a thin knitted liner (300), wherein the thin knitted liner has a plurality of finger components, a thumb component (402), a backhand component (420), and a palm component. The thin knitted liner comprises a covered yarn having a first yarn (100) and a second yarn (200), wherein the first yarn (102) is a core yarn that is 20 denier or less, and a second yarn, wherein the second yarn (104) is at least one of an intermingled yarn or a first wrapping yarn surrounding the core yarn, wherein the second yarn is 30 denier or less; and a thin polymeric coating adhered to the thin knitted liner.