Heat Insulation Mat with Wavy Seams for Fire Protection
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Solution Overview
Problem
Conventional thermal insulation mats fail to meet fire protection regulations due to metallized outer films that do not melt together under a standard flame, causing continuous heat introduction and ignition, and straight seams can promote ignition like a wick, leading to certification failures.
Innovation Solution
The mats feature layers that melt together under a standard flame with wavy seams that change position relative to the flame, avoiding heat introduction and ignition, and include perforation holes for diffusion openness, using thin metallized outer layers and flame-retardant materials, and a multi-needle sewing method for production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If straight seams are used to connect layers, then the layers are securely held together, but the seams promote ignition like a wick under standard flame
Solution Approach 1:
The patent applies this principle by replacing straight seams with wavy seams. The wavy configuration prevents the seam from acting as a continuous wick that promotes flame propagation, while still maintaining adequate layer connection. The curved path disrupts the direct heat transfer pathway that would otherwise exist in a straight seam.
Solution Approach 2:
The wavy seam introduces asymmetry in the seam pattern, creating irregular spacing and orientation of stitch points. This asymmetric configuration prevents uniform heat distribution along the seam, disrupting the wick effect that would occur with symmetric straight seams.
2Loss of energy
If thin metallized outer layers are used, then thermal insulation performance is improved, but the layers fail to melt together under standard flame causing continuous heat introduction
Solution Approach 1:
The patent applies this principle by using composite material structures where thin metallized layers are combined with flame-retardant materials. The composite structure allows the thin metallized layer to provide thermal reflection and insulation while the flame-retardant components ensure proper melting behavior under fire conditions, preventing continuous heat introduction.
Solution Approach 2:
The patent changes material parameters by selecting specific flame-retardant materials with controlled melting points. These materials are designed to melt at temperatures below the ignition point, creating a protective barrier that stops heat transfer before the thin metallized layer can continuously conduct heat into the insulation core.
3Reliability
If flame-retardant chemicals are applied to films, then fire protection is improved, but the adhesives used for reinforcement have fire-accelerating effect
Solution Approach 1:
The patent extracts or removes the problematic adhesive layer from the construction. Instead of using adhesives to attach reinforcement textiles to the metallized film, the design relies on the flame-retardant material properties and structural design to achieve fire protection without introducing fire-accelerating substances.
Solution Approach 2:
The patent converts the potential harm of thin metallized layers (which don't melt together) into a benefit by combining them with flame-retardant materials that deliberately melt at controlled temperatures. This melting creates a protective effect that stops heat transfer, turning what could be a fire hazard into a fire protection mechanism.
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 prevents wicking effects, ensures compliance with fire protection regulations, and enhances thermal insulation by forming air layers and using reflective metallized outer layers, achieving high heat transfer resistance and effective fire protection.
Implementation Method 1
heat and cold are reflected on metallized outer layers made of polyester film
Implementation Method 2
the high thermal insulation effect of insulating material mats according to the invention is achieved in that heat and cold are reflected on metallized outer layers
Implementation Method 3
which melt together exclusively under the heat of a standard flame of a standardized burning test
Implementation Method 4
which does not - like straight seams - remain a standard flame in the local area or - like zigzag seams - jump back into it, but rather always changes its position in this regard and migrates out of the local area flame, thus avoiding an undesirable wicking effect of the seam threads and ignition of the insulation materials used, which melt together within the permitted limits
Data Source
Figure 1~3
AI summary
The present invention relates to a heat-insulating-material mat (10) in particular for building construction, which is formed from layers (1, 2, 3, 4, etc.) which are arranged loosely one above the other and are made of insulating materials which fuse together exclusively under the heat of a standard flame of a fire test conducted in accordance with standard DIN EN ISO 11925-2 and are held together by means of at least one seam (31, 32, 33) which is configured in undulating form in the longitudinal direction (X) and/or transverse direction (Y) of the mat (10) and in the case of which at least one thread (20, 21, 22) is guided through the layers (1, 2, 3, 4, etc.), wherein the undulating form of the seam (31, 32, 33) is dimensioned such that, constantly changing in position in relation to the local surface area of the standard flame, it moves out of the local flame-treatment surface area. A method for producing heat-insulating-material mats (10) making use of a multi-needle sewing machine is also claimed. The heat-insulating-material mat (10) according to the invention, which can be supplied in a variant which is closed to diffusion and in a variant which is open to diffusion, is suitable for insulating static objects such as roofs, walls/facades or floors and also for lining, for example, drivers' cabs, caravans and other means of transport.