Leg Extension Welded Regions for Absorbent Article Leakage Control
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Solution Overview
Problem
Existing pull-on absorbent articles face challenges in preventing lateral leakage due to contraction or curling of leg extension sections when joined with waist stretchable members, which affects their ability to fit closely around the wearer's legs.
Innovation Solution
A pull-on absorbent article design featuring waist-circumference sections with lateral elastic members and leg extension sections with vertical elastic members, where the leg extension sections overlap with waist-circumference sections and include welded regions to enhance lateral stiffness, preventing contraction and ensuring a wider fit around the legs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the extension sections are joined to the waist-circumference sections, then the structural integrity is improved, but the extension sections contract or curl laterally reducing fit quality
Solution Approach 1:
The patent applies different properties to different parts of the extension section: the overlap portion is joined to the waist-circumference section for structural integrity, while the non-overlap portion remains free to maintain lateral width and fit quality around the wearer's legs
Solution Approach 2:
The extension section is divided into two functional parts: an overlap portion that is joined to the waist-circumference section for stability, and a non-overlap portion that remains unjoined to maintain lateral dimensions and prevent curling
2Object-affected harmful factors
If the extension sections are made wide to fit around legs, then leakage prevention is improved, but the sections are more affected by waist stretchable member contraction
Solution Approach 1:
The patent creates a gradient of joined portions where the extension section is joined at the overlap portion for structural support but remains free at the non-overlap portion to maintain lateral width, achieving both leakage prevention and resistance to contraction
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 design effectively suppresses leakage from around the legs by maintaining the leg extension sections in a wide, stable position, ensuring a secure fit and reliable excrement containment.
Implementation Method 1
the overlap portion, in the extension section, having a welded region placed therein, the welded region having a predetermined length in the lateral direction
Data Source
AI summary
A pull-on absorbent article includes: an absorbent main body including an absorbent body along a vertical direction; and waist-circumference sections in a pair respectively located on one end side and another end side of the absorbent main body, the waist-circumference sections each including an elastic member stretchable in a lateral direction, the absorbent main body including extension sections in a pair respectively extending outward on two lateral sides of the absorbent body, the extension sections each having an elastic member stretchable in the vertical direction placed therein, the extension sections each forming a leg opening and including an overlap portion that overlaps in the vertical direction with at least one of the waist-circumference sections in a pair, the overlap portion having at least a part joined to the waist-circumference section, the overlap portion of the extension section having a welded region having a predetermined lateral length placed therein.