Absorbent Article Closure Web with Anchored Fastening
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Solution Overview
Problem
Existing absorbent article closure elements with elastic and inelastic regions face challenges in reliable fastening due to insufficient reinforcement, particularly with the attachment of fastening material, which can lead to tearing under tension and increased material and process costs.
Innovation Solution
A compound material web with a nonwoven web, elastically extensible film strips, and a strip of fastening material where the nonwoven material overlaps the edges of the fastening material, with projections extending into the nonwoven material for mechanical anchoring, providing a secure and cost-effective fastening solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a continuous layer of adhesive is used to reinforce the compound material web, then the material strength is improved, but the cost of material and process increases
Solution Approach 1:
The invention extracts the essential reinforcement function from the continuous adhesive layer and concentrates it only in the critical regions where fastening material is attached. This selective reinforcement approach maintains necessary strength while eliminating unnecessary adhesive application areas, thereby reducing material costs and simplifying the manufacturing process.
Solution Approach 2:
The invention applies reinforcement selectively only in the regions where fastening material will be attached, rather than using a continuous layer across the entire web. This local quality approach ensures that adhesive is used only where structurally necessary, optimizing both strength and cost-effectiveness by avoiding redundant adhesive application in non-critical areas.
2Strength
If fastening material is attached to the outer side of the web with continuous adhesive reinforcement, then the fastening strength is improved, but the reliability of fastening decreases due to tearing under tension
Solution Approach 1:
The invention applies adhesive reinforcement selectively only in the regions underlying the fastening material attachment zones. This localized approach ensures that the critical attachment points have sufficient strength and resistance to tearing, while avoiding unnecessary adhesive in other areas. The result is improved fastening reliability without the complexity of continuous reinforcement.
Solution Approach 2:
The invention pre-reinforces the specific regions where fastening material will be attached before the actual fastening process. By preparing these critical zones in advance with targeted adhesive application, the web is ready to withstand the tensions and forces that will be applied during fastening, thereby ensuring reliable attachment without requiring continuous reinforcement throughout the entire web.
3Strength
If two opposing non-elastic material strips are provided as reinforcement, then the strength is improved, but the material cost and process complexity increase
Solution Approach 1:
The invention extracts the essential reinforcement function from the dual non-elastic strips configuration and achieves the same strength enhancement with a single layer of adhesive applied selectively to the nonwoven web. This simplification maintains the necessary structural support while eliminating the complexity of applying and coordinating two opposing reinforcement layers.
Solution Approach 2:
The invention uses a composite structure combining the nonwoven web with selectively applied adhesive regions to achieve reinforcement. This composite approach provides the necessary strength through the combination of materials and their strategic arrangement, replacing the need for two opposing non-elastic strips with a more efficient single-sided adhesive reinforcement system.
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 ensures reliable fastening and prevents tearing at the transition from elastic to inelastic regions, reducing material costs and improving the durability of the absorbent article closure elements.
Implementation Method 1
projections which extend into the nonwoven material
Data Source
AI summary
A closure element comprising a composite web comprising: a nonwoven web; an elastically extensible film strip joined to the top surface of the nonwoven web; a nonwoven material disposed on top of the film strip; and a strip of a fastening material disposed on top of the nonwoven web, wherein the nonwoven material overlaps the edges of the strip of fastening material and the strip of fastening material at its edges overlapped by the nonwoven material has projections which extend into the nonwoven material, as well as absorbent articles that include closure elements.