Coated microfibrous web and method for producing the same
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Solution Overview
Problem
Radiation protection articles with polyurethane coatings on the outside suffer from strong abrasion when used in medical settings, necessitating a solution that enhances abrasion resistance without using halogenated organic substances.
Innovation Solution
A coated microfiber web comprising a microfibrous web of polyesters or polyamides impregnated with an aromatic dicarboxylic acid esterified with a diol, and a polyurethane layer applied to only one side, using an impregnation formulation including water, silicones, and waxes, which improves adherence and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polyurethane coating is applied to the outside of radiation protection articles, then protection against reflex radiation is improved, but abrasion resistance deteriorates due to strong abrasion during use
Solution Approach 1:
The patent inverts the conventional structure by placing the polyurethane coating on the inner side of the microfiber web instead of the outer side. This inversion protects the coating from direct abrasion while maintaining its radiation protection function, thereby resolving the contradiction between radiation protection reliability and abrasion resistance.
Solution Approach 2:
The patent uses a composite structure combining a microfiber web (providing mechanical strength and abrasion resistance) with a polyurethane coating layer (providing radiation protection). The microfiber web acts as a protective substrate that shields the polyurethane coating from mechanical damage while allowing the coating to fulfill its radiation protection role.
2Reliability
If conventional impregnation methods are used, then coating adherence is improved, but halogenated organic substances are required which are environmentally harmful
Solution Approach 1:
The patent changes the chemical parameters of the impregnation composition by using aromatic dicarboxylic acid esters instead of conventional halogenated organic substances. This parameter change maintains the impregnation effectiveness and coating adherence while eliminating the harmful halogenated compounds, thus resolving the contradiction between coating adherence and environmental harm.
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 coated microfiber web exhibits improved abrasion resistance and durability, maintaining effectiveness as a radiation protection material while avoiding the use of halogenated organic substances, making it suitable for medical applications.
Implementation Method 1
an aromatic dicarboxylic acid whose carboxylic acid groups are each esterified with a diol
Data Source
Figure 1~2
AI summary
The present invention relates to a coated microfibrous web, to a method for producing the same, to the use thereof as a covering of a radiation protection material and also to a radiation protection device. The coated microfibrous web comprises: (i) a microfibrous web comprising one or more polyesters and/or one or more polyamides and/or one or more polyamide-polyester copolymers and having an impregnation composition comprising (a) an aromatic dicarboxylic acid, the dicarboxylic groups of which are each esterified with a diol, and/or (b) one or more oligomers, each containing 2 to 10 repeat units consisting of a monoester of an aromatic dicarboxylic acid impregnated with a diol; and (ii) a layer comprising polyurethane which is present only on one side of the microfibrous web.