Absorbent Core Joint Section Flexibility and Strength
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Solution Overview
Problem
The absorbent article with a joint section formed in the low basis weight region may experience a decrease in joining strength and liquid absorbability, affecting its performance in terms of bending flexibility and liquid retention.
Innovation Solution
An absorbent article with a joint section formed in the low basis weight region of the absorbent core, utilizing a hydrophilic fiber and superabsorbent polymer, where the ratio of superabsorbent polymer basis weight to absorbent material basis weight is between 10/100 to 47/100, ensuring sufficient bending flexibility, joining strength, and liquid absorbability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the joint section is formed in the low basis weight region of the absorbent body, then the rigidity of the joint section is reduced and wearability is improved, but the joining strength and liquid absorbability decrease
Solution Approach 1:
The absorbent core is designed with spatially varying basis weight and composition: a low basis weight region (10-30 g/m²) where the joint section is formed to provide flexibility and wearability, and a high basis weight region (50-100 g/m²) to provide sufficient liquid absorbability and joining strength. This local differentiation allows each region to optimize its function.
Solution Approach 2:
The patent changes the physical parameters of the absorbent core by controlling the basis weight and superabsorbent polymer content in different regions. The low basis weight region has reduced material density to improve flexibility, while the high basis weight region has increased material density to ensure sufficient strength and absorbability, resolving the contradiction between wearability and performance.
2Shape
If the joint section is formed in the low basis weight region of the absorbent body, then the rigidity of the joint section is reduced and bending flexibility is improved, but the liquid absorbability decreases
Solution Approach 1:
The absorbent core is designed with spatially varying basis weight and composition: a low basis weight region (10-30 g/m²) where the joint section is formed to provide flexibility and wearability, and a high basis weight region (50-100 g/m²) to provide sufficient liquid absorbability and joining strength. This local differentiation allows each region to optimize its function.
Solution Approach 2:
The patent changes the physical parameters of the absorbent core by controlling the basis weight and superabsorbent polymer content in different regions. The low basis weight region has reduced material density to improve flexibility, while the high basis weight region has increased material density to ensure sufficient strength and absorbability, resolving the contradiction between wearability and performance.
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 article achieves improved joining strength, bending flexibility, and liquid absorbability, preventing liquid leakage and maintaining performance during repeated liquid absorption.
Implementation Method 1
the ratio of the superabsorbent polymer basis weight to the absorbent material basis weight in the second region is from 10/100 to 47/100
Implementation Method 2
an absorbent core disposed between the liquid-permeable layer and the liquid-impermeable layer, wherein the absorbent core has a first region having a predetermined absorbent material basis weight and a second region having a predetermined absorbent material basis weight which is lower than that of the first region
Data Source
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AI summary
The present invention addresses the problem of providing an absorbent article in which a bonding part for bonding a liquid-permeable layer to an absorbent core has been formed in a low-basis-weight region of the absorbent core and which has all of sufficient flexural rigidity of the bonding part, sufficient bonding strength of the bonding part, and sufficient liquid-absorbing properties. This problem is solved with an absorbent core (4) which comprises a first region that has a given absorbent-material basis weight and second regions (regions 411a, 411b) that have a lower absorbent-materia basis weight than the first region, wherein the ratio of the basis weight of a highly absorbing polymer to the basis weight of the absorbent material in the second regions is regulated to 10/100 to 47/100, and compressed parts (5a, 5b) are formed inside the second regions.