Absorbent Article Outer Body Connecting Sheet Attachment
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Solution Overview
Problem
The existing manufacturing methods for underpants-type absorbent articles face challenges in reliably connecting product members while preventing damage to the material, particularly when cutting and removing portions of the inner body, which can lead to decreased productivity and product quality.
Innovation Solution
A manufacturing method where the outer body is formed by attaching a connecting sheet to separate front and back pieces, allowing for reliable connection and attachment of the inner body without cutting and removing portions, thus preventing material damage and ensuring reliable product assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the inner body is cut and removed after attachment to the outer body web, then the outer body can be formed from separate front and back pieces, but the risk of mistakenly cutting and damaging the absorptive body increases
Solution Approach 1:
The connecting sheet is attached to the front piece web and back piece web before the cutting step, establishing the outer body structure in advance. This preliminary attachment ensures that when the inner body is subsequently attached and any cutting occurs, the outer body is already formed and protected, eliminating the risk of damaging the absorptive body while maintaining the ability to use separate front and back pieces.
2Adaptability or versatility
If the front piece and back piece are formed from separate sheets, then manufacturing flexibility is improved, but the risk of product members not being reliably connected increases
Solution Approach 1:
The connecting sheet serves as an intermediary element that is attached to both the front piece web and back piece web. This intermediary component ensures reliable connection between the separate front and back pieces while maintaining manufacturing flexibility. The connecting sheet acts as a mediator that consolidates the separate pieces into a unified outer body structure.
3Ease of manufacture
If the outer body web is cut before attaching the inner body, then the cutting process is simplified, but the risk of damaging the absorptive body increases
Solution Approach 1:
The connecting sheet is attached to form the outer body web before the cutting step. This preliminary formation of the outer body structure ensures that the absorptive body is protected during cutting operations. The outer body web is established in advance, so when cutting occurs to form leg holes or other shapes, the absorptive body is already secured and protected from damage.
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 method ensures reliable connection of product members and prevents material damage, maintaining productivity and product quality by forming the outer body with a connecting sheet that straddles the spacing area between the front and back pieces, allowing for smooth attachment of the inner body.
Implementation Method 1
an outer body web forming step for forming a continuous body of the outer body in the form of an outer body web by attaching the connecting sheet to the front piece web and the back piece web
Implementation Method 2
an edge forming step for cutting the outer body web in order to form edges that define leg holes
Implementation Method 3
an attachment step for attaching the inner body to the outer body web
Data Source
AI summary
A method of manufacturing an underpants-type absorbent article having an outer body provided with a mutually separate front piece, back piece and connecting sheet, and wherein the front piece and the back piece are mutually joined at side areas and are mutually connected by the connecting sheet extending in the front-to-rear direction at the crotch area, and an inner body containing an absorptive body and which is overlapped and anchored to the connecting sheet on the inside of the outer body, comprises, in turn, transporting a continuous body of the front piece in the form of a front piece web and a continuous body of the back piece in the form of a back piece web in a machine direction while maintaining a spacing area in a cross-machine direction, forming a continuous body of the outer body in the form of an outer body web by attaching the connecting sheet to the front piece web and the back piece web at intervals in the machine direction so as to straddle the spacing area, cutting the outer body web in order to form edges that define leg holes, and attaching the inner body to the outer body web.