Disposable Diaper Segmented Skin Contact Layer for Fecal Isolation

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Solution Overview

Problem

Conventional disposable diapers fail to effectively separate and manage urine and feces, leading to potential skin contamination and increased risk of urinary tract infections due to the spread of harmful bacteria from feces.

Innovation Solution

A disposable diaper design featuring a base layer with an absorber, a cover layer, and a skin contact layer with separate inlet cutting parts for urine and feces, utilizing elastic members to minimize skin contact and create a receiving space for feces, preventing bacterial transfer to the urinary tract.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a conventional diaper structure with a single absorption layer is used, then the diaper can absorb urine, but feces may spread to the waist and buttocks causing skin contamination and infection

Engineering Contradiction:

Improveskin contamination and infection riskVSAvoiddiaper structure complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The diaper is divided into distinct functional zones: a first receiving region for feces with a first skin contact layer, and a second receiving region for urine with a second skin contact layer. This segmentation allows separate management of feces and urine, preventing fecal contamination of the skin while maintaining overall absorption functionality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the diaper are assigned different material properties and functions. The first skin contact layer in the feces receiving region is designed with specific characteristics to prevent fecal adhesion and skin contact, while the second skin contact layer in the urine receiving region has properties optimized for urine absorption and skin comfort.

Inventive Principle:

Principle #3Local quality

2Ease of operation

If the skin contact layer is made to closely contact the skin for comfort, then skin comfort is improved, but feces can adhere to the diaper and spread to the skin causing contamination

Engineering Contradiction:

Improveskin comfortVSAvoidfecal contamination

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The skin contact layer is segmented into a first portion for feces reception and a second portion for urine reception. The first portion is designed with properties that prevent fecal adhesion and minimize skin contact, while the second portion provides comfortable skin contact for urine absorption, thus resolving the contradiction between comfort and contamination prevention.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first portion of the skin contact layer has different physical and chemical properties compared to the second portion. The first portion is designed with low adhesion characteristics to prevent fecal sticking, while the second portion has high absorption and comfort properties for urine management.

Inventive Principle:

Principle #3Local quality

3Reliability

If a simple absorption structure is used, then manufacturing is simple, but harmful bacteria in feces can enter the urinary tract causing urinary tract infections

Engineering Contradiction:

Improveprevention of urinary tract infectionVSAvoiddiaper structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The diaper structure is segmented into distinct feces receiving and urine receiving regions with separate skin contact layers. This segmentation creates a physical barrier that prevents fecal bacteria from migrating to the urine and urinary tract, thereby preventing urinary tract infections while maintaining a relatively simple overall structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first skin contact layer acts as an intermediary barrier between feces and the skin, preventing direct contact and bacterial transfer. This intermediary layer specifically blocks the migration path of harmful bacteria from the feces receiving region to the urinary tract area.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

Maintains a clean and dry inner surface of the diaper in contact with the skin, reducing the risk of skin contamination and infection by preventing feces from coming into contact with the skin and urinary tract.

Implementation Method 1

a base layer including an absorber at an upper end thereof in the lengthwise direction

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Implementation Method 2

including first elastic members on both sides in the lengthwise direction so as to encompass the wearer's legs; having second elastic members, which come into close contact with the bottom layer skin of the wearer's buttocks

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS10940054B2Disposable diaper with inlet cutting part on skin contact layer

Publication Date: 2021.03.09 GIL JUN MO

AI summary

The present invention relates to a disposable diaper for absorbing and receiving excreted urine and feces, The diaper includes a base layer including an absorber and a cover layer positioned at an upper end of the absorber. A skin contact layer is positioned at an upper end of the base layer so as to cover the cover layer, having an inlet cutting part cut in a predetermined length such that urine and feces reach the cover layer or the absorber.