Conformable Skin Adhesive Composition with Shape Retention

Solution Overview

Problem

Conventional adhesive compositions for ostomy appliances are either too hard to shape and adhere poorly to skin irregularities or too soft and prone to leakage when exposed to water, posing challenges for aged individuals with limited dexterity and strength.

Innovation Solution

A conformable composition combining a reinforcing component, a rubber adhesive component, and a hydrophilic polymer compound, which can be easily formed into shapes with bare hands, maintains adhesiveness, and retains shape even after water exposure, reducing stickiness and adhesive residue.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If the adhesive composition is made hard to maintain shape retention, then shape retention is improved, but formability and conformability to skin deteriorate

Engineering Contradiction:

Improveshape retentionVSAvoidformability

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The patent applies parameter changes by carefully controlling the composition ratios of rubber adhesive component (40-90 wt%), reinforcing component (1-20 wt%), and hydrophilic polymer compound (2-40 wt%). This specific parameter range enables the composition to achieve both shape retention and formability, resolving the contradiction between hardness and softness.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses composite materials by combining three distinct components: rubber adhesive component for adhesiveness, reinforcing component for shape retention, and hydrophilic polymer compound for water resistance and skin compatibility. This composite structure allows the material to simultaneously achieve shape retention and formability that single materials cannot provide.

Inventive Principle:

Principle #40Composite materials

2Ease of operation

If the adhesive composition is made soft to improve formability, then formability is improved, but shape retention and durability against water deteriorate

Engineering Contradiction:

ImproveformabilityVSAvoidshape retention

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The patent applies parameter changes by carefully controlling the composition ratios of rubber adhesive component (40-90 wt%), reinforcing component (1-20 wt%), and hydrophilic polymer compound (2-40 wt%). This specific parameter range enables the composition to achieve both shape retention and formability, resolving the contradiction between hardness and softness.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses composite materials by combining three distinct components: rubber adhesive component for adhesiveness, reinforcing component for shape retention, and hydrophilic polymer compound for water resistance and skin compatibility. This composite structure allows the material to simultaneously achieve shape retention and formability that single materials cannot provide.

Inventive Principle:

Principle #40Composite materials

3Reliability

If the adhesive composition has high adhesiveness to fill gaps, then leakage prevention is improved, but stickiness and difficulty in handling with bare hands deteriorate

Engineering Contradiction:

Improveleakage preventionVSAvoidhandling ease

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent applies parameter changes by optimizing the rubber adhesive component content (40-90 wt%) and combining it with hydrophilic polymer compound (2-40 wt%) that reduces stickiness. This parameter optimization allows the composition to maintain high adhesiveness for leakage prevention while reducing excessive stickiness that hinders handling.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces hydrophilic polymer compound as an intermediary substance that mediates between the rubber adhesive component and the skin. This intermediary provides the necessary adhesiveness for gap filling while reducing excessive stickiness, making the composition easier to handle with bare hands.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Adaptability or versatility

If the adhesive composition is made conformable to skin irregularities, then adhesion to wrinkled skin is improved, but shape retention and durability against water deteriorate

Engineering Contradiction:

Improveconformability to skinVSAvoiddurability against water

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies parameter changes by optimizing the hydrophilic polymer compound content (2-40 wt%) which provides conformability to skin irregularities, while balancing it with reinforcing component (1-20 wt%) and rubber adhesive component (40-90 wt%) to maintain shape retention and water durability.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses composite materials where hydrophilic polymer compound enables conformability to skin wrinkles and irregularities, while the rubber adhesive component and reinforcing component work together to provide shape retention and resistance to water, achieving both conformability and durability.

Inventive Principle:

Principle #40Composite materials

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 composition effectively fills skin gaps and irregularities, preventing leakage while maintaining adhesiveness and shape retention, enhancing user handling and physiological skin function.

Implementation Method 1

a rubber adhesive component

Methodology Applied

Scientific EffectAdhesion: Adhesive

Implementation Method 2

a hydrophilic polymer compound... does not lose its shape even after the contact with water such as excretion

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Data Source

PatentUS10471173B2Conformable composition for skin applications

Publication Date: 2019.11.12 ALCARE CO LTD

AI summary

Provided is a conformable composition for skin application having good formability into a predetermined shape, good conformability to skin, and shape retention after the contact with water such as excretion without loss of its shape. The conformable composition for skin application includes a reinforcing component, a rubber adhesive component, and a hydrophilic polymer compound, or the conformable composition for skin application at least includes 1 to 20 wt % a reinforcing component, 40 to 90 wt % a rubber adhesive component, and 2 to 40 wt % a hydrophilic polymer compound.