Flame-Resistant Closure With Carrier Layer
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Solution Overview
Problem
Existing flame-retardant closures, such as Velcro fasteners, do not meet the increased flammability requirements in aircraft technology, particularly the EADS specification FAR25.853(b), and are often expensive to implement, especially when using carbon fiber materials or complex coating processes.
Innovation Solution
A flame-retardant closure is created by using a standard, cost-effective closure part made from conventional plastic materials like polypropylene or polyamide, combined with a special carrier layer containing a flame-retardant medium or active extinguishing substance, which can be attached using an adhesive layer, ensuring effective flame retardancy and ease of use in tight spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional plastic materials (polypropylene, polyamide) are used for closure parts, then cost-effectiveness is improved, but flame-retardant properties deteriorate
Solution Approach 1:
The patent applies composite materials by combining conventional plastic closure parts with a carrier layer containing flame-retardant medium. The closure part consists of a base fabric made from conventional textiles or plastics combined with a carrier layer containing flame-retardant substances such as phosphorus compounds, nitrogen compounds, or metal hydroxides. This composite structure maintains the cost-effectiveness of conventional materials while achieving the required flame-retardant properties through the synergistic combination of materials.
2Object-affected harmful factors
If carbon fiber materials are used for flame-retardant closure, then flame-retardant properties are improved, but cost increases significantly
Solution Approach 1:
The patent employs inexpensive flame-retardant media such as phosphorus compounds, nitrogen compounds, aluminum hydroxide, or magnesium hydroxide instead of expensive carbon fiber materials. These cheaper flame-retardant substances are applied to conventional closure parts through coating, impregnation, or lamination processes, achieving the required flame-retardant performance at a fraction of the cost of carbon fiber solutions.
3Object-affected harmful factors
If complex coating processes are used to achieve flame retardancy, then flame-retardant properties are improved, but device complexity increases
Solution Approach 1:
The patent merges the flame-retardant function with the existing closure part structure by integrating the flame-retardant medium into the carrier layer that is already part of the closure assembly. Rather than adding separate complex coating processes, the flame-retardant properties are combined with the base fabric or backing layer through impregnation or lamination, simplifying the overall structure while achieving the required flame resistance.
4Object-affected harmful factors
If flame-retardant medium is introduced into fastener itself, then flame-retardant properties are improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-treating the base fabric or carrier layer with flame-retardant media before assembling the closure components. The flame-retardant substances are impregnated into the textile base material or applied as a pre-formed coating layer during the fabric manufacturing process, so that when the closure parts are assembled, the flame-retardant protection is already in place, simplifying the overall manufacturing process.
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 provides a cost-effective flame-retardant closure that meets the stringent flammability requirements while allowing for easy attachment and use in confined areas, such as passenger seat upholstery, without using harmful substances or expensive materials.
Implementation Method 1
a flame-retardant closure having at least one closure part with at least one basic fabric made of warp threads and weft threads and having functional threads protruding on the front side of the basic fabric, which at least partially penetrate the basic fabric and form the closure elements, the basic fabric being of a non-flame-retardant type and at least partially has a carrier layer with a flame-retardant medium and/or with an active extinguishing medium on its rear side
Data Source
Figure 1~2
AI summary
The invention relates to a flame-resistant closure comprising at least one closing part having at least one two-dimensional backing fabric (14) from warp threads (10) and weft threads (12) and having functional threads (16) on the right side of the backing fabric (14) that at least partially extend through the backing fabric (14) and that form the closing elements (18). The backing fabric (14) is of the non-flame-resistant type and at least some sections of its reverse side comprise a substrate layer (32) with a hardly inflammable medium and/or with an active extinguishing medium. The closure according to the invention meets even high demands on low inflammability.