Cushion Layer Air Pockets Absorbent Article Hard Spots
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Solution Overview
Problem
Disposable absorbent products, such as diapers and incontinence briefs, often suffer from hard spots due to uneven absorbent cores and thin outercover laminates, leading to reduced softness and comfort, which can cause negative user perception and discomfort.
Innovation Solution
Incorporating a layer of cushion material with air pockets between the nonwoven fabric and the absorbent structure to minimize tactile hardness, using materials like poly film, closed-cell foam, or embossed paper to create a composite that deforms under compressive force, thereby reducing the perception of hard spots and enhancing softness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If production line speed is increased to reduce manufacturing costs, then productivity is improved, but the probability of uneven regions in absorbent core increases leading to hard spots
Solution Approach 1:
The patent applies beforehand cushioning by incorporating a cushion layer with air pockets between the outercover laminate and the absorbent core. This cushion layer is pre-positioned to compensate for hard spots that form during high-speed production, allowing the product to be packaged and shipped with the cushioning already in place to mask tactile hardness signals.
2Ease of manufacture
If outercover laminate is made thinner to achieve desired cost structure, then cost is reduced, but hard spots and SAP particles protrude more easily through the laminate
Solution Approach 1:
The patent uses an intermediary approach by introducing a cushion layer as a mediator between the thin outercover laminate and the absorbent core. This intermediate layer with air pockets absorbs the mechanical stress and prevents direct contact between hard spots and the user, allowing the use of thinner, more cost-effective laminates without sacrificing comfort.
3Volume of moving object
If absorbent product is compressed to reduce thickness for transport and storage, then volume is reduced, but hard spots are formed that protrude through the poly film/backsheet laminate
Solution Approach 1:
The cushion layer with air pockets is applied beforehand during manufacturing, before compression packaging. This pre-positioned cushioning remains effective during storage and transport, masking the tactile hardness signals of compressed hard spots when the product is eventually used.
4Object-affected harmful factors
If conventional softening methods are applied to improve tactile signals, then softness is improved, but mechanical properties such as tensile strength decrease
Solution Approach 1:
The patent employs porous materials by using a cushion layer containing air pockets with porosities ranging from 30% to 90%. This porous structure provides tactile softness and cushioning effects without requiring chemical additives or resin treatments that would compromise the mechanical strength of the outercover laminate.
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 effectively reduces the tactile signal of hard spots, improving the overall softness and comfort of absorbent products by maintaining a cushioned feel both during packaging and use, while maintaining mechanical integrity and cost-effectiveness.
Implementation Method 1
a layer of cushion material configured to reduce user perception of hardness or hard spots in the absorbent structure
Implementation Method 2
using materials like poly film, closed-cell foam, or embossed paper to create a composite that deforms under compressive force
Data Source
AI summary
Disposable absorbent articles and methods of making disposable absorbent articles that comprise: an absorbent structure; and a layer of cushion material configured to minimize user perception of hardness or hard spots in the absorbent structure.