Tripartite Diaper Shell with Overlapping Absorbent Insert
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Solution Overview
Problem
Disposable incontinence diapers face challenges in economic manufacturing and user comfort due to the need for additional materials for Velcro-type hook closures and varying skin friendliness, which increases costs and affects subjective comfort.
Innovation Solution
A tripartite diaper shell composed of a main part and separate rear lateral parts, with a non-woven material structure that includes an absorbent insert with a fluid-impermeable back sheet, allowing for reduced material usage and enhanced comfort by maintaining air permeability and reinforcing the non-woven composite with the absorbent insert in overlapping regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If textile loop components are applied to the outer side of the front region for Velcro-type hook closures, then the closure function is achieved, but the manufacturing cost increases substantially
Solution Approach 1:
The patent uses a printed pattern on the film material that visually simulates the appearance of textile loop components. This graphic representation provides the necessary visual guidance for closure attachment without requiring actual textile loops, thereby achieving the closure function indication while substantially reducing manufacturing costs.
Solution Approach 2:
The patent replaces the mechanical textile loop component system with a printed graphical representation on the film surface. This substitution eliminates the need for physical loop materials while maintaining the functional requirement of providing a closure attachment guide, thereby reducing material costs and simplifying manufacturing.
2Reliability
If the outer side of the main part is formed using film material to prevent fluid leakage, then fluid barrier function is achieved, but skin friendliness is reduced
Solution Approach 1:
The patent applies different material properties to different regions: the film material with closure guidance is used specifically in the front region where fluid barrier and closure functions are critical, while other regions can use more skin-friendly materials. This localized application maintains fluid barrier reliability where needed while improving overall skin friendliness.
Solution Approach 2:
The printed pattern on the film acts as an intermediary that provides visual guidance for closure attachment without requiring physical textile loops. This intermediary solution maintains the fluid barrier function of the film while reducing the need for additional materials that would compromise skin friendliness.
3Object-affected harmful factors
If lateral parts are made permeable to air and water vapor for skin friendliness, then comfort is improved, but fluid barrier reliability is reduced
Solution Approach 1:
The patent implements different permeability characteristics in different regions: the front region uses film material with closure guidance for fluid barrier reliability, while lateral parts use permeable non-woven materials for skin friendliness and comfort. This spatial differentiation of material properties resolves the contradiction by applying the right material property in the right location.
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 results in a more economically viable and comfortable disposable incontinence diaper with reduced material investment, improved skin friendliness, and enhanced durability by maintaining air permeability and reinforcing the non-woven composite.
Implementation Method 1
an absorbent insert having an inner side and an outer side is disposed on the inner side of the diaper shell, wherein the absorbent insert comprises a fluid-impermeable back sheet and a top sheet between which an absorbent body is disposed
Implementation Method 2
an absorbent body is disposed therebetween
Implementation Method 3
the main part and the rear lateral parts comprise a non-woven material or are formed therefrom
Implementation Method 4
the absorbent insert comprises a fluid-impermeable back sheet
Data Source
AI summary
The application relates to an absorbent disposable incontinence diaper (2, 2a) of the open type having an at least three-part diaper cover (3) with an inner side (30) and an outer side (31), the diaper cover comprising a main part (4) and at least two separate rear side parts (16). The main part (4) has a front region (6), a rear region (8) and a crotch region (12), which lies therebetween in the longitudinal direction (21) and comes to lie between the legs of a user. The rear side parts (16) are arranged on both sides of the rear region (8) of the main part (4) in such a manner that said rear side parts (16) are fixed in first overlap regions (40) with the outer side thereof on the inner side of the main part (4) along rear, lateral longitudinal edges (20). The rear side parts (16) extend in the transverse direction (22) over the rear lateral longitudinal edges (20) of the main part (4) and have closure means (10). The main part (4) and the rear side parts (16) comprise a nonwoven material or are made therefrom. The diaper cover (3) extends continuously over a length L1 from a front end (33) of the diaper cover (3) via the crotch region (12) to a rear end (34) of the diaper cover (3). An absorption insert (5) having an inner side and an outer side is arranged on the inner side (30) of the diaper cover (3), the absorption insert (5) comprising a liquid-impermeable back sheet (62) and a top sheet (64), between which an absorption body (7) is arranged. The absorption insert (5) extends into the first overlap regions (40) and is fixed there at least in some sections with the outer side thereof on the diaper cover (3). The absorption insert (5) has a length L2, where L2<L1.