Formed Web With Partially Attached Chads
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Solution Overview
Problem
Existing webs lack a textured, three-dimensional surface that provides desirable feel, visual impression, and auditory properties, particularly in absorbent articles where specific properties like softness and fluid handling are needed in predetermined locations.
Innovation Solution
A formed web with discrete three-dimensional elements, including chads, that are partially attached to apertures, allowing for enhanced softness and flexibility, created through a process involving precursor webs stretched beyond their yield point and formed between mated structures with specific geometries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a web has a smooth, flat surface, then it is easy to manufacture, but it lacks desirable feel, visual impression, and auditory properties
Solution Approach 1:
The patent transitions from a two-dimensional flat web surface to a three-dimensional textured surface by forming discrete elements (chads, domes, pillars) that protrude from the web plane. This dimensional change creates tactile, visual, and auditory properties while maintaining manufacturability through integrated forming processes.
Solution Approach 2:
The patent applies local quality by creating discrete three-dimensional elements at specific locations on the web rather than uniformly texturing the entire surface. The chads, domes, and pillars are formed in predetermined patterns, allowing different regions of the web to have different properties (e.g., softness, fluid handling) while the bulk of the web remains flat and easy to manufacture.
2Shape
If a web has a textured surface with discrete three-dimensional elements, then it provides desirable feel and visual impression, but it increases manufacturing complexity
Solution Approach 1:
The patent merges multiple functions into a single manufacturing step by forming the discrete three-dimensional elements (chads, domes, pillars) directly during the web forming process. The forming structures integrate cutting, shaping, and texturing operations, eliminating the need for separate post-processing steps and reducing overall manufacturing complexity.
Solution Approach 2:
The forming structures serve multiple functions simultaneously: they cut the web to create discrete elements, shape the elements into desired geometries (chads, domes, pillars), and create the textured surface pattern. This multi-functionality reduces the number of manufacturing steps and equipment needed.
3Strength
If chads are fully attached around the entire aperture perimeter, then the web structure is strong, but the chads lack flexibility and softness
Solution Approach 1:
The patent applies partial attachment by securing the chad base only at a portion of the aperture perimeter (e.g., 25-75% of the circumference) rather than fully around the entire perimeter. This partial attachment provides sufficient structural strength to keep the chad connected to the web while leaving the remainder of the chad free and flexible, enabling the desired softness and movement.
Solution Approach 2:
The attachment characteristics vary locally around the aperture perimeter. The chad base is attached at specific locations (e.g., at the apex or along portions of the perimeter) while remaining unattached at other locations. This local variation in attachment provides both structural integrity and flexibility, allowing the chad to move and bend in desired ways.
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 web achieves a soft, aesthetically pleasing texture with improved sound effects and specific properties like enhanced fluid handling, suitable for absorbent articles and other applications.
Implementation Method 1
a precursor web is stretched beyond its yield point to deform a thermoplastic
Data Source
Figure 1A~1B
Figure 2A~2E
Figure 3~4
AI summary
A formed web comprising discrete three-dimensional elements formed therein, wherein at least some of the discrete three-dimensional elements comprise chads with corresponding apertures, wherein the aperture has a perimeter, wherein the chad has a length, wherein the chads are attached along a portion of the aperture perimeter which forms a connection segment, wherein the connection segment is less than about 50% of the entire aperture perimeter, and wherein the web comprises a film.