Reinforcing Sheet for Pants-Type Absorbent Article Waist Breakage
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Solution Overview
Problem
Pants-type absorbent articles break easily when worn and the wearer is active, due to the thinness of the exterior member which is intended to improve air permeability and reduce costs.
Innovation Solution
Incorporating reinforcing sheets that extend transversely and overlap the folded-back portions of the external backsheets in the waist regions, providing additional strength and preventing breakage while maintaining low basis weights for improved air permeability and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the basis weight of the exterior member is decreased to improve air permeability and reduce cost, then air permeability and cost are improved, but the strength and durability of the absorbent article deteriorates
Solution Approach 1:
The patent combines a thin exterior member with a reinforcing sheet to create a composite structure. The exterior member maintains low basis weight for air permeability and cost efficiency, while the reinforcing sheet provides the necessary strength and durability, resolving the contradiction between thinness and strength.
Solution Approach 2:
The reinforcing sheet is strategically positioned to overlap with the folded-back portion of the exterior member at the waist opening, providing localized reinforcement exactly where the thin exterior member is most vulnerable to breakage during wear and activity.
2Quantity of substance
If the exterior member is made thinner to improve flexibility and air permeability, then air permeability is improved, but the reliability of the absorbent article deteriorates
Solution Approach 1:
The patent creates a composite structure where the thin exterior member maintains flexibility and air permeability, while the reinforcing sheet compensates for the reduced reliability, allowing the article to withstand wear and activity without breaking.
Solution Approach 2:
The reinforcing sheet is incorporated in advance into the structure at the critical waist opening region, providing preemptive reinforcement that prevents breakage before it occurs during wear and activity.
Data Source
AI summary
A pants-type absorbent article for which damage during wearing motions can be suppressed. The pants-type absorbent article includes: a front waist region; a rear waist region; a crotch region; a waist opening defined by the front waist region and the rear waist region and disposed to surround a waist of the wearer; an external topsheet provided on at least one of the front waist region and the rear waist region; and an external backsheet bonded to the external topsheet. The external backsheet has a folded-back portion folded back at the waist opening, the folded-back portion extending beyond the external topsheet toward to the waist opening. A reinforcing sheet extends in a transverse direction orthogonally crossing the front-back direction and to overlap at least part of the folded-back portion. The reinforcing sheet has a length in the front-back direction longer than a length of the folded-back portion in the front-back direction.