Elastic Laminate With Integral Micro-Hook Tabs for Simpler Fastening
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Solution Overview
Problem
Existing methods for producing elastic side panels for absorbent sanitary articles require complex and expensive equipment due to the handling and transportation of discrete micro-hook tapes, leading to increased costs and user discomfort from rigid micro-hook pads.
Innovation Solution
A transversely extensible continuous elastic laminate is manufactured in-line with the manufacturing process, eliminating the need for discrete micro-hook tapes by integrating micro-hook formations directly onto a non-woven support web, reducing complexity and cost, and using softer non-woven material for a more comfortable user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If discrete micro-hook pads are fixed on a continuous non-woven support web using glue or welding, then fastening functionality is achieved, but manufacturing complexity increases and production costs rise
Solution Approach 1:
The patent merges the micro-hook formation and support web into a single integral non-woven structure. The micro-hook formations are directly formed within the continuous non-woven support web during its manufacture, eliminating the need for separate micro-hook pads and their associated fixing equipment. This integration simplifies the manufacturing process and reduces device complexity.
Solution Approach 2:
The patent extracts the micro-hook formations from separate rigid thermoplastic components and integrates them directly into the non-woven support web material itself. This eliminates the need for additional materials and the complex equipment required to handle and attach discrete micro-hook tapes.
2Productivity
If discrete micro-hook pads are cut from continuous tapes and spaced precisely, then fastening tabs are formed, but manufacturing precision requirements increase and production time increases
Solution Approach 1:
The patent maintains the continuous nature of the non-woven support web throughout the manufacturing process. The micro-hook formations are created continuously within the web material as it is being manufactured, eliminating the need for stopping to cut, space, and reposition discrete micro-hook pads. This continuous process improves productivity while maintaining precise tab placement through the inherent structure of the web.
3Strength
If relatively rigid thermoplastic material is used for micro-hook pads, then fastening strength is achieved, but user comfort decreases due to stiffness and potential skin irritation
Solution Approach 1:
The patent creates a composite structure where micro-hook formations are integrated within the non-woven support web material. This combination allows the micro-hooks to provide fastening strength while the surrounding soft non-woven material provides comfort and prevents skin irritation. The rigid thermoplastic is replaced with a softer, more comfortable material that maintains functional performance.
Data Source
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AI summary
A transversely extensible continuous elastic laminates (50) comprising a continuous elastic tape (18) sandwiched between two continuous webs (10, 30), and at least one row of tabs (58) extending transversely outside the two webs (10, 30), wherein the tabs (58) are made of a non-woven material and have respective micro-hook formations (22) integrally formed in the non-woven material forming the tabs (58).