Carrier Web Adhesive Fastener Production
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Solution Overview
Problem
Existing methods for producing adhesive fastener parts are inefficient in material usage and sensitive to the rheology of coating materials, leading to potential tearing during demolding and increased rigidity, which affects adhesion properties, especially on curved surfaces.
Innovation Solution
A method involving a carrier web connected to the coating material before forming adhesive elements, allowing the coating material to be thinner and less sensitive to rheology, reducing material usage and enhancing flexibility, with optional curing methods like thermal radiation or UV light for polymerization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the coating material is pressed into mold cavities without a carrier web, then adhesive elements are formed, but the coating material is sensitive to rheology changes causing tearing during demolding
Solution Approach 1:
A carrier web is introduced as an intermediary substrate between the coating material and the mold cavities. The coating material is applied to the carrier web before forming adhesive elements, which provides mechanical support during handling and demolding. This mediator prevents tearing of the coating material while maintaining the adhesive element formation process.
2Loss of substance
If the coating material is applied without a carrier web, then material usage is reduced, but the coating material becomes too thin and prone to tearing
Solution Approach 1:
The system is segmented into two functional components: a reusable carrier web that provides mechanical strength and a thin coating material layer that forms adhesive elements. This segmentation allows the coating material to be applied as a thin layer without tearing, while the carrier web bears the mechanical loads during processing and demolding.
3Loss of substance
If the coating material layer is made thinner to save material, then material consumption is reduced, but the fastener part becomes too rigid affecting adhesion on curved surfaces
Solution Approach 1:
The carrier web is designed as a flexible substrate that can conform to curved surfaces, while the thin coating material layer forms adhesive elements on its surface. This combination maintains flexibility for adapting to various surface geometries while minimizing coating material consumption. The carrier web's flexibility compensates for the thinness of the coating layer.
4Adaptability or versatility
If a thick coating material layer is used, then the fastener part has sufficient flexibility, but material consumption increases and rigidity affects adhesion properties
Solution Approach 1:
The system changes the parameter of coating material thickness by applying it as a thin layer on a carrier web, rather than using a thick standalone layer. This parameter change reduces material consumption while the carrier web provides the necessary flexibility and mechanical properties that would otherwise require a much thicker coating layer.
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 method reduces material consumption, enhances flexibility, and improves adhesion properties on various surfaces, including curved ones, while maintaining robustness and efficiency in the manufacturing process.
Implementation Method 1
optional curing methods like thermal radiation or UV light for polymerization
Data Source
AI summary
A method for producing a touch-and-close fastener part has a plurality of adhesive elements with front-side contact surfaces for releasable adhesion to other components by an adhesive force. The adhesive elements are formed from a coating material in mold cavities of a mold screen of a molding tool. In the method, a carrier web is fed to the coating material and the adhesive elements are formed in the mold cavities of the molding tool on a side of the carrier web facing the coating material. The carrier web is preferably connected to the coating material before the adhesive elements are formed. A device for producing the touch-and-close fastener part is disclosed.