Absorbent Article Outer Cover Bonding for Conformability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing absorbent articles face challenges in preventing sagging after fluid absorption and achieving conformability to the wearer's body.
Innovation Solution
The absorbent article features an outer cover with a waist elasticized region and a lower elasticized region, where the outer and inner sheets are bonded with different bond strengths, allowing the outer sheet to bulge and form folds for improved conformability and air passageways.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the outer sheet is made completely bonded to the inner sheet, then structural strength is improved, but conformability to the wearer's body deteriorates
Solution Approach 1:
The outer cover is segmented into multiple regions with different bonding characteristics: a first region with strong bonding between outer and inner sheets, and a second region with weak or no bonding. This segmentation allows different parts of the outer cover to serve different functions - the first region provides structural strength while the second region provides conformability and fold formation.
Solution Approach 2:
Different regions of the outer cover are given different local qualities through varying bond strengths. The first region has strong bonding for structural support, while the second region has weak bonding to allow the outer sheet to bulge and form folds for conformability. This local differentiation resolves the contradiction between overall strength and local flexibility.
2Adaptability or versatility
If the outer sheet is made completely non-bonded to the inner sheet, then conformability is improved, but structural strength deteriorates
Solution Approach 1:
The outer cover is divided into regions with different bonding characteristics, allowing simultaneous presence of strong and weak bonding zones. This segmentation enables the structure to have both strong areas for support and weak areas for flexibility, resolving the contradiction between strength and conformability.
Solution Approach 2:
Different local qualities are assigned to different regions: the first region has strong bonding for structural integrity, while the second region has weak bonding for conformability. This local quality differentiation allows the outer cover to exhibit both strength and flexibility in appropriate locations.
3Ease of manufacture
If uniform bond strength is used throughout the outer cover, then manufacturing simplicity is improved, but functional performance deteriorates
Solution Approach 1:
The bonding structure is segmented into regions with different bond strengths, which can be achieved through selective application of adhesive or varying bonding parameters during manufacturing. This segmentation improves functional performance by providing both strength and conformability, while remaining compatible with existing manufacturing processes.
Solution Approach 2:
Local quality variation in bond strength is introduced to different regions of the outer cover. This can be implemented through selective adhesive application or varying bonding conditions in different zones, maintaining manufacturing feasibility while significantly improving functional performance through differentiated bonding characteristics.
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
This design effectively prevents the absorbent article from sagging after fluid absorption while enhancing conformability to the wearer's body, reducing skin chafing and improving comfort.
Implementation Method 1
a plurality of elastic members between the outer and inner sheets
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An absorbent article 1 of the present invention includes an absorbent assembly 3 and an outer cover 2. The outer cover 2 includes an outer sheet 22, an inner sheet 23, and a plurality of elastic members 24 between the sheets 22 and 23. The outer cover 2 has a waist elasticized region G1 and a lower elasticized region G2. The outer sheet 22 and the inner sheet 23 are bonded at laterally spaced bonds 26. The outer cover 2 has, between laterally adjacent bonds 26, a longitudinally continuous non-bonded region 25 where the outer and the inner sheets are not bonded to each other. The outer sheet 22 is configured to bulge away from the skin of a wearer on contraction of the elastic members 24 to form a plurality of longitudinally extending folds. The waist elasticized region G1 has a lower bond strength than the lower elasticized region G2.