Coated Microfiber Web Layout for Abrasion-Resistant Radiation Covers

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Solution Overview

Problem

Radiation protection materials with polyurethane coatings on the outside suffer from high abrasion when used in medical settings, leading to reduced durability and effectiveness.

Innovation Solution

A coated microfiber web is developed by impregnating a microfiber web with a fluoropolymer and applying a polyurethane coating on one side, followed by thermal treatment, to create a radiation protection material with improved abrasion resistance and water repellency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a polyurethane coating is applied on the outside of radiation protection material, then abrasion resistance is improved, but the coating suffers from high physical stress and wear in medical settings

Engineering Contradiction:

Improveabrasion resistanceVSAvoiddurability under physical stress

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The patent inverts the conventional arrangement by placing the polyurethane coating on the inner side of the microfiber web instead of on the outer surface. This reversal protects the coating from direct exposure to abrasion and physical stress while maintaining its protective function against radiation, thereby resolving the contradiction between abrasion resistance and durability under physical stress.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent creates a composite structure combining polyurethane coating with microfiber web impregnated with fluoropolymer. This composite material integrates the radiation protection properties of polyurethane with the mechanical strength and water repellency of fluoropolymer-impregnated microfiber, achieving both radiation protection and resistance to abrasion and physical stress.

Inventive Principle:

Principle #40Composite materials

2Reliability

If a polyurethane coating is applied on the outside of radiation protection material, then radiation protection is provided, but the coating is subject to very high abrasion

Engineering Contradiction:

Improveradiation protectionVSAvoidabrasion

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent reverses the conventional configuration by positioning the polyurethane coating on the inner side of the microfiber web rather than on the outer surface. This inversion shields the coating from abrasion while preserving its radiation protection capability, thus resolving the contradiction between radiation protection and resistance to abrasion.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The microfiber web impregnated with fluoropolymer serves as an intermediary layer between the polyurethane coating and the external environment. This intermediary structure protects the polyurethane coating from abrasion while allowing the coating to maintain its radiation protection function, effectively mediating between the coating's protective role and its vulnerability to mechanical wear.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Strength

If a microfiber web is impregnated with fluoropolymer and coated with polyurethane on one side, then cut and tear resistance is enhanced, but the structure becomes more complex

Engineering Contradiction:

Improvecut and tear resistanceVSAvoidcoating structure

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The patent applies fluoropolymer impregnation and polyurethane coating selectively to specific regions of the microfiber web - the fluoropolymer is impregnated throughout the web structure while the polyurethane coating is applied only to one side. This localized application achieves enhanced cut and tear resistance without unnecessarily complicating the overall structure, as each treatment is applied only where needed for optimal performance.

Inventive Principle:

Principle #3Local quality

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 provides enhanced cut and tear resistance, reducing physical stress and maintaining performance in medical environments, while ensuring the polyurethane coating is protected from abrasion, thus extending the material's lifespan and usability.

Implementation Method 1

impregnating the microfiber web with a waterproofing composition comprising fluoropolymer

Methodology Applied

Scientific EffectHydrophobic effect: Hydrophobe

Implementation Method 2

thermally treating the coated microfiber web obtained in step (d)

Methodology Applied

Scientific EffectThermal treatment: Heat Treatment

Data Source

PatentEP2464781B1Use of a coated microfiber web as a cover of a radiation protection material

Publication Date: 2013.10.30 MAVIG GMBH

Figure 1~2

AI summary

The present invention relates to a coated microfibrous web, a method for producing the same, use thereof as a covering of a radiation protection material and also a radiation protection device. The coated microfibrous web comprises: (i) a microfibrous web which is impregnated with a fluoropolymer; and (ii) a layer comprising polyurethane, which is present only on one side of the microfibrous web.