Prefastened Refastenable Diaper Manufacturing via Continuous Web Bonding
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Solution Overview
Problem
Manufacturing refastenable diaper pants with discrete elastically extendable components in the waist regions poses challenges in maintaining control and positioning during assembly, often requiring a removable sheet that increases costs and affects aesthetics.
Innovation Solution
The method involves advancing discrete chassis with lateral axes parallel to the machine direction, refastenably connecting first side panels with the first waist region and permanently connecting second side panels with the second waist region, forming a continuous web and eliminating the need for a removable sheet by intermittently spacing chassis and side panels, which are then bonded and cut to create discrete pre-fastened refastenable pant diapers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a removable sheet is used to interconnect discrete elastically extendable components during manufacturing, then control and positioning of advancing components is enhanced, but manufacturing costs increase and aesthetic quality deteriorates
Solution Approach 1:
The patent removes the removable sheet from the manufacturing process entirely. Instead of using a sheet to interconnect discrete elastically extendable components, the invention directly bonds these components to the chassis in a continuous web configuration, eliminating the need for the sheet and its subsequent removal.
Solution Approach 2:
The patent merges the function of the removable sheet with the permanent structure by making the side panel connections permanent through bonding. The discrete elastically extendable components are directly bonded to the chassis, combining what were previously separate (temporary sheet + permanent structure) into a single permanent integrated structure.
2Adaptability or versatility
If discrete elastically extendable components are used in waist regions, then refastenable functionality is achieved, but control and positioning of advancing components becomes difficult
Solution Approach 1:
The patent maintains the dynamic nature of the elastically extendable components while providing stable positioning through continuous web bonding. The discrete elastically extendable components are bonded to the chassis in a continuous web configuration, allowing them to dynamically adjust while being securely positioned during manufacturing and use.
Solution Approach 2:
The continuous web acts as an intermediary that connects and positions the discrete elastically extendable components relative to the chassis. This continuous web provides a stable reference system that maintains control and positioning accuracy while allowing the refastenable functionality to operate independently.
3Reliability
If a removable sheet is included in manufactured diaper pants, then assembly control is enhanced, but costs increase and aesthetics are negatively impacted
Solution Approach 1:
The patent eliminates the need for the removable sheet by making the side panel connections permanent through bonding. This permanent bonding approach is more cost-effective than producing, managing, and disposing of removable sheets while providing equal or superior assembly control.
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 approach enhances control and positioning accuracy during assembly, reduces costs by eliminating the need for a removable sheet, and improves the aesthetic quality of the final product while maintaining refastenable functionality.
Implementation Method 1
fastening components (162) located on the first side panels (112a, 112b) and adapted to refastenably connect with the first waist region (116)
Implementation Method 2
bonding the second discrete patches (360b) with the first waist region (116)
Data Source
AI summary
Aspects of the methods according to the present disclosure relate to the fabrication of refastenable pant diapers wherein discrete chassis are advanced in a machine direction such that the lateral axis is parallel with the machine direction. First side panels are then refastenably connected with the first waist region, and second side panels are permanently connected the second waist regions of the discrete chassis. The methods disclosed herein connect chassis with discrete lengths of side panel material and/or connection zone material, and forms a continuous web of articles formed by intermittently spaced chassis and intermittently spaced side panels bridging the gap between the intermittently spaced chassis. The chassis are then folded in the cross direction parallel to a lateral centerline and the first and second side panels are subsequently bonded together. The article is then subjected to knife cut adjacent the bonded regions to create discrete, pre-fastened refastenable pant diapers.