Surface Fastener Hook Functionalization for Vibration Resistance
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Solution Overview
Problem
Current surface fastener systems require high closing forces for assembly and exhibit inadequate holding forces, leading to potential detachment under vibrations, posing a risk especially in vehicle applications.
Innovation Solution
The method involves applying a functional medium, such as fluorine or its compounds, only to the hook parts of surface fastener systems, keeping the head parts largely or completely free of the medium to reduce closing forces while increasing holding forces by enhancing friction between the hook parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a functional medium is applied to the entire surface of the surface fastener part, then bonding to foam material is improved, but closing forces become excessively high
Solution Approach 1:
The functional medium is applied selectively only to the hook parts of the surface fastener, not the entire surface. This local application ensures that the hook parts have enhanced bonding properties while the head parts maintain their original sliding characteristics, thus resolving the contradiction between bonding reliability and closing force requirements.
Solution Approach 2:
The surface fastener part is divided into functionally distinct zones: hook parts receive the functional medium for enhanced bonding, while head parts remain untreated for low-friction sliding. This segmentation allows each component to optimize its specific function without compromising the other.
2Ease of operation
If conventional surface fastener systems are used, then assembly is simple, but holding forces are inadequate under vibrations
Solution Approach 1:
The functional medium is applied selectively only to the hook parts of the surface fastener, not the entire surface. This local application ensures that the hook parts have enhanced bonding properties while the head parts maintain their original sliding characteristics, thus resolving the contradiction between bonding reliability and closing force requirements.
Solution Approach 2:
The functional medium acts as an intermediary substance that enhances the interaction between hook parts and the foam material or counter-surface. It provides the necessary friction and bonding properties to the hook parts without affecting the sliding function of the head parts, thereby improving holding forces while maintaining ease of assembly.
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 significantly reduces closing forces and doubles or more than doubles holding forces, ensuring secure attachment of components like roof or wall panels even under oscillations or vibrations, facilitating easier installation and preventing unintended detachment.
Implementation Method 1
at least some of the hook parts (18) of a surface fastener part (12, 14) are provided with a functional medium, preferably in the form of a coating and in the gaseous phase, in particular halogens such as fluorine or its compounds
Data Source
AI summary
A method surface functionalizes and produces a surface fastener part (12) forming a surface faster (10) that can be opened and closed repeatedly with a mating surface fastener part (14). The surface fastener parts (12, 14) include protruding hook parts (18) disposed at least partially on a carrier part (16), each having a head part (20) on its side facing away from the carrier part (16) and forming a fastening element (22). At least one part of the hook parts (18) of a locking part (12, 14) is provided with a functional medium. The associated head parts (20) are kept largely or completely away from the medium. The fastening forces for engaging the corresponding fastening elements (22) and forming the closed surface fastener (10) are then reduced. The holding forces are then increased up to separating the corresponding fastening elements (22) and forming the opened surface fastener (10).