Laminate
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Solution Overview
Problem
Conventional protective gloves coated with rubber or resin suffer from reduced productivity and comfort due to permeation issues, leading to flexibility and wear resistance problems.
Innovation Solution
A laminated body composed of a fiber substrate and a polymer layer formed from polymer latex, where the polymer layer's permeation ratio and top surface coverage are controlled within specific ranges, using a nonionic water-soluble polymer and nitrile rubber with controlled viscosity, to create a protective glove with improved durability and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rubber or resin is deposited on the fiber glove to improve protective properties, then solvent resistance and grip properties are improved, but the rubber or resin permeates into the fiber glove causing deposition on the glove mold and reduced productivity
Solution Approach 1:
The fiber substrate is designed with controlled porosity and pore size distribution to allow the polymer layer to permeate only to a controlled extent. The porous structure enables the polymer to penetrate into the fiber matrix without reaching the glove mold, thus maintaining protective properties while preventing excessive permeation that would cause productivity issues.
Solution Approach 2:
The invention controls the permeation depth by adjusting parameters such as polymer concentration, fiber substrate porosity, and deposition conditions. By optimizing these parameters, the polymer layer achieves the desired balance between providing protective properties and preventing excessive permeation that would deposit material on the glove mold.
2Reliability
If rubber or resin is deposited on the fiber glove to improve protective properties, then solvent resistance and grip properties are improved, but the polymer layer thickness and permeation amount are not controlled reducing flexibility
Solution Approach 1:
The fiber substrate is designed with non-uniform porosity distribution, having different pore sizes and densities in different regions. This allows the polymer layer to permeate to different depths in different areas, providing enhanced protection in high-risk zones while maintaining flexibility in areas requiring dexterity.
Solution Approach 2:
The invention optimizes polymer concentration, molecular weight, and deposition parameters to control the permeation depth and final polymer layer thickness. By carefully adjusting these parameters, the polymer layer achieves sufficient thickness for solvent resistance while maintaining adequate flexibility for comfortable wear.
3Ease of operation
If a thin film is formed using emulsion of rubber or synthetic resin to improve flexibility, then the protective glove becomes more flexible, but the thickness and permeation amount are not controlled reducing wear resistance
Solution Approach 1:
The invention uses a composite structure combining fiber substrate with polymer layer, where the fiber matrix provides structural integrity and wear resistance while the polymer layer provides flexibility and solvent resistance. The controlled permeation creates a hybrid material system that combines the advantages of both materials.
Solution Approach 2:
The invention optimizes polymer concentration, molecular weight distribution, and deposition parameters to achieve the desired balance between flexibility and wear resistance. By controlling these parameters, the polymer layer forms a thin yet durable coating that maintains flexibility while providing sufficient wear resistance.
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 enhances productivity and comfort by achieving an excellent balance between durability and flexibility in the protective glove, preventing permeation issues and ensuring effective wear resistance.
Implementation Method 1
a polymer layer formed from a polymer latex, wherein the polymer layer covers the fiber substrate in a state in which a portion of the polymer layer has permeated among the fibers
Data Source
AI summary
A laminated body formed by laminating a fiber substrate composed of a plurality of fibers and a polymer layer formed from a polymer latex. The polymer layer covers the fiber substrate in a state in which a portion of the polymer layer has permeated among the fibers. A ratio (t1/d) of a thickness t1 of the portion of the polymer layer that has permeated among the fibers (from a top surface of the fiber substrate) to a substrate layer average thickness d is 0.1 to 0.95. A thickness t2 of the portion of the polymer layer covering the top surface of the fiber substrate (from the top surface of the fiber substrate) is 80 μm or more.