Absorbent Article Laminate Edge Fastening
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Solution Overview
Problem
Existing absorbent articles face issues with fastening tab separation during application and wearing, and the use of adhesive release tapes can lead to flagging and increased costs.
Innovation Solution
An absorbent article design featuring a laminate wrapped around the chassis' edge, with a carrier having a fastening patch exposed on the topsheet side, eliminating the need for release tapes and enhancing edge strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If adhesive release tape is used to manage exposed adhesive, then adhesive exposure is controlled, but flagging occurs and costs increase
Solution Approach 1:
The patent removes the release tape component entirely from the system. Instead of using adhesive release tape to manage exposed adhesive, the invention uses a laminate structure where the adhesive is fully contained within the laminate layers, eliminating the need for release tape and its associated flagging problems and costs.
Solution Approach 2:
The patent replaces the expensive release tape with a cost-effective laminate structure. The laminate serves as both the fastening element and the adhesive containment mechanism, providing a cheaper alternative that eliminates the need for separate release tape components.
2Strength
If adhesive is used to attach fastening tab to absorbent article, then attachment is achieved, but tab separation occurs during application and wearing
Solution Approach 1:
The patent uses a laminate structure composed of multiple layers including a first substrate, adhesive layer, and second substrate. This composite structure distributes mechanical stresses across multiple interfaces and materials, preventing tab separation that occurs with single-layer adhesive attachment.
Solution Approach 2:
The patent transitions from a two-dimensional adhesive application to a three-dimensional laminate structure wrapped around the longitudinal edge. This dimensional change provides attachment strength in multiple directions and prevents separation during application and wearing.
3Strength
If laminate is wrapped around chassis edge, then edge strength is improved and flagging is avoided, but manufacturing complexity increases
Solution Approach 1:
The laminate structure serves multiple functions simultaneously: it provides edge strength, contains the adhesive, creates the fastening patch with fastening elements, and eliminates the need for release tape. This multi-functionality reduces overall device complexity despite the wrapped structure.
Data Source
AI summary
An absorbent article including a chassis and a laminate. The chassis has a topsheet side, a backsheet side, and first and second opposing longitudinal edges extending from a rear waist region to an opposing front waist region. The laminate includes a carrier having a first face and a second face and a fastening patch on a portion of the first face of the carrier. The laminate is wrapped around the first longitudinal edge of the chassis in the rear waist region so that the second face of the carrier contacts the topsheet side and the backsheet side of the chassis. The fastening patch includes fastening elements that are exposed on the topsheet side of the chassis. A method of making the absorbent article is also disclosed.