Decoupling Mat with Cavity Structure for Subsurface Tension Absorption
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Solution Overview
Problem
Existing decoupling mats lack sufficient decoupling capability to effectively absorb and compensate for tensions in the subsurface, such as those caused by drying, settling, or thermal expansion, which can lead to crack formation in tile coverings.
Innovation Solution
A decoupling mat with a flexible plastic layer featuring a grid-shaped arrangement of depressions with undercuts on one side and cavities on the other, and additional weakening zones that allow for further movement perpendicular to the weakening zones' direction, enhancing the mat's decoupling capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the plastic layer is made firmly connected to ensure structural integrity, then strength is improved, but decoupling capability deteriorates due to reduced freedom of movement
Solution Approach 1:
The plastic layer is segmented into multiple cavities arranged in rows and columns, creating discrete movement zones. This segmentation allows the material to maintain overall structural integrity while enabling localized deformation in specific areas, thus resolving the contradiction between strength and decoupling capability.
Solution Approach 2:
The plastic layer exhibits different properties in different regions: areas with cavities provide flexibility and movement freedom for decoupling, while the overall continuous structure maintains structural integrity. This local differentiation of properties resolves the contradiction between firm connection and decoupling capability.
2Adaptability or versatility
If the plastic layer is made elastic to provide freedom of movement, then decoupling capability is improved, but manufacturing precision deteriorates due to deformation control difficulties
Solution Approach 1:
The plastic layer is designed with dynamic characteristics through its elastic properties and cavity structure, allowing it to adapt its deformation behavior based on applied tensions. This dynamic response enables freedom of movement while the consistent cavity pattern provides predictable deformation control, resolving the contradiction between adaptability and manufacturing precision.
3Ease of manufacture
If the decoupling mat structure is simplified, then ease of manufacture is improved, but decoupling capacity deteriorates due to insufficient movement freedom
Solution Approach 1:
The patent uses a thin film-like plastic layer with an integrated cavity pattern that combines structural simplicity with effective decoupling capacity. The thin film design facilitates easy manufacture while the strategically placed cavities provide sufficient freedom of movement for tension absorption, resolving the contradiction between ease of manufacture and decoupling capacity.
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 mat provides improved decoupling capacity by allowing the thin-bed mortar stilts to move within the cavities and the plastic layer to deform, effectively absorbing and compensating for subsurface tensions, thereby preventing tension transfer to the tile covering.
Implementation Method 1
the elasticity of the film-like plastic to achieve the decoupling effect, which allows the thin-bed mortar stilts formed in the recesses to move in the direction of the cavities with deformation of the plastic layer
Data Source
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Figure 5
AI summary
Decoupling mat 1 comprising a flexible plastic layer 2 made of film-like plastic with a structure which, on the first side 4, which forms the top side of the decoupling mat 1 when installed as intended, defines recesses 6 with undercuts 5, which are channel-like, form a grid-like arrangement and have a cross-section adapted to the diameter of a cable 18, in particular a heating cable, such that the cable 18 can be clamped in the recesses 6, and defines cavities 8 arranged between the recesses 6 on the opposite second side 7, and a nonwoven fabric or woven material 3 firmly connected to the second side 7 and covering the cavities 8,wherein the recesses 6 extend in a straight line and continuously between opposite side edges of the plastic layer 2 in the longitudinal and/or transverse direction of the decoupling mat and by which the plastic layer 2 is structurally given an additional possibility of movement essentially transverse to the direction of extension of the weakening zones 12.