Disposable Hygiene Article V-Shaped Compression Lines
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Solution Overview
Problem
Existing disposable hygiene articles, such as sanitary towels and diapers, face challenges in achieving a secure fit and conforming well to the body, particularly in the front and crotch portions, while also requiring a simple manufacturing method using minimal equipment modifications.
Innovation Solution
The design incorporates a transverse direction with a longitudinal centre line dividing the article into symmetrical portions, featuring a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent core with distinct regions of varying density and compression patterns to enhance fit and bending properties, including V-shaped compression lines and a liquid acquisition sheet for improved comfort and absorbency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the absorbent core uses a uniform density design, then the manufacturing process is simple, but the fit and conformance to the body is poor
Solution Approach 1:
The absorbent core is designed with different density regions: a first region with higher average density and a second region with lower average density. This local quality differentiation allows the core to conform better to the body's anatomy in the crotch and rear portions while maintaining structural integrity, resolving the contradiction between fit quality and manufacturing simplicity.
Solution Approach 2:
The absorbent core is segmented into multiple functional regions (first region and second region) with distinct density characteristics. This segmentation enables different parts of the core to perform different functions - the denser first region provides structural support and targeted absorption, while the less dense second region provides comfort and flexibility, thereby improving overall fit without requiring complex manufacturing equipment.
2Shape
If the article uses a symmetric design about the longitudinal centre line, then the manufacturing is simplified, but the fit in the front and crotch portions is insufficient
Solution Approach 1:
While maintaining overall symmetry about the longitudinal centre line for manufacturing simplicity, the patent introduces asymmetric density distribution within the symmetric framework. The first region with higher density is positioned to provide enhanced fit in the crotch and rear portions, creating a controlled asymmetry in material properties that improves fit without requiring asymmetric manufacturing processes.
3Quantity of substance
If the absorbent core has high density throughout, then the absorbency is improved, but the comfort and conformability to the body is reduced
Solution Approach 1:
The absorbent core applies local quality by concentrating higher density absorbent material in the first region where absorption is most needed (crotch and rear portions), while using lower density material in the second region for comfort and flexibility. This localized density distribution maintains high overall absorbency while improving comfort and conformability to the body.
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 provides a better fit and comfort by conforming to the body's anatomy, improving absorbency and leakage security, while allowing for easy manufacturing with minimal equipment modifications, ensuring the article remains in place effectively during use.
Implementation Method 1
an absorbent core arranged between the topsheet and backsheet
Implementation Method 2
an absorbent core arranged between the topsheet and backsheet
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention relates to a disposable hygiene article (1)having a core with a first area (12) which has its narrowest width (M) in the transverse direction (x) in a front portion (2) or at a location of a transition (5) between the front portion (2) and a crotch portion (3) of the article. Further, the absorbent core (6) in the crotch portion (3) comprises at least one front compression line forming an essentially upside down turned V comprising a first leg (51), a second leg (53) and a common front tip (52) with a V-shaped second compression line in the front portion (2)comprising a third leg (71) and a fourth leg (73). Each of the legs extends and diverges at a mutual angle (α4) of from 30-120º in the respective mirror-imaged portions (I) and (II), and wherein the common front tip (52) is located in contact with or at a distance of an imaginary transverse line indicating the narrowest width M.