Composite End-Holding Sheet for Diaper Adhesive Barrier
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional pants-type disposable diapers with end-holding sheets made of spunbonded nonwoven fabric and attached using hot-melt adhesive can cause skin problems due to adhesive permeation, leading to discomfort for the wearer.
Innovation Solution
A pants-type disposable diaper featuring an end-holding sheet composed of a composite nonwoven fabric with a laminated spunbonded nonwoven fabric layer on a meltblown nonwoven fabric layer, preventing hot-melt adhesive permeation and enhancing skin feel, using a rubber hot-melt adhesive for attachment to withstand stretching and contraction, and hydrophilization with a surfactant for improved softness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an end-holding sheet made of spunbonded nonwoven fabric is attached with hot-melt adhesive, then the end-holding sheet can be fixed to the pants-shaped outer member and absorbent main body, but the hot-melt adhesive permeates the end-holding sheet causing skin problems
Solution Approach 1:
The end-holding sheet is constructed as a composite nonwoven fabric combining a spunbonded nonwoven fabric layer and a meltblown nonwoven fabric layer. The meltblown layer acts as an adhesive barrier that prevents hot-melt adhesive from permeating through to the skin side, while the spunbonded layer provides structural integrity and softness for skin contact. This composite structure successfully fixes the attachment function while blocking adhesive permeation.
2Object-affected harmful factors
If a meltblown nonwoven fabric layer is added to prevent adhesive permeation, then skin problems are reduced, but the complexity of the end-holding sheet structure increases
Solution Approach 1:
The end-holding sheet uses a composite nonwoven fabric structure with two layers: a spunbonded layer for structural support and skin comfort, and a meltblown layer specifically for blocking adhesive permeation. This composite approach achieves the dual function of preventing adhesive migration while maintaining structural integrity and softness, without requiring additional separate components or complex assembly processes.
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 solution effectively prevents hot-melt adhesive permeation, reducing skin problems and enhancing the skin feel of the end-holding sheet, ensuring comfort and durability during use.
Implementation Method 1
the hot-melt adhesive used for adhering the end-holding sheet is prevented from permeating by the meltblown nonwoven fabric layer
Implementation Method 2
attached to the pants-shaped outer member and the absorbent main body with a hot-melt adhesive
Data Source
AI summary
A pants-type disposable diaper comprises: a pants-shaped outer member having a front part, a back part, and a crotch part positioned between the front part and the back part, and having a waist opening and a pair of leg openings formed by joining the front part and the back part; an absorbent main body disposed on an inner surface of the pants-shaped outer member at the crotch part, and comprising a top sheet, a back sheet, and an absorbent core disposed between the top sheet and the back sheet; and an end-holding sheet covering a longitudinal end of the absorbent main body at the front part and/or the back part of the pants-shaped outer member, and attached to the pants-shaped outer member and the absorbent main body with a hot-melt adhesive; wherein the end-holding sheet includes a composite nonwoven fabric in which a spunbonded nonwoven fabric layer is laminated on an inner surface of a meltblown nonwonven fabric layer. According to the pants-type disposable diaper on the above, a hot-melt adhesive is prevented from permeating an end-holding sheet, whereby a skin problem is less likely to be caused for the wearer.