Plastic-Bonded Worktop Heat Resistance via Metamorphic Rock Composition
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Solution Overview
Problem
Quartz-based worktops have limited heat resistance, restricting their use in kitchen environments.
Innovation Solution
A worktop composition comprising 25-50% metamorphic hard rocks (granite, gabbro, volcanic rock) with 0-20% glass granules and 37-75% feldspar, bound with a heat-curing polymer, enhancing heat resistance and chemical durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If quartz-based composite material is used for worktops, then hardness and abrasion resistance are achieved, but heat resistance is limited
Solution Approach 1:
The patent changes the material composition parameters by replacing quartz-based minerals with a specific mixture containing metamorphic hard rocks (25-50 wt%), glass granules (0-20 wt%), and feldspar (37-75 wt%). This parameter change in the aggregate composition enables the worktop to achieve both high hardness and significantly improved heat resistance, resolving the contradiction between hardness and heat resistance.
Solution Approach 2:
The patent creates a composite material system consisting of multiple types of aggregates (metamorphic hard rocks, glass granules, feldspar) bound with polymer binder. This composite approach allows combining the hardness properties of metamorphic rocks with the heat resistance properties of feldspar and glass, achieving superior overall performance compared to single-material quartz composites.
2Temperature
If metamorphic hard rocks are used to increase heat resistance, then heat resistance improves by 40-50°C, but the composition must be precisely controlled to maintain hardness
Solution Approach 1:
The patent specifies precise parameter ranges for all components: metamorphic hard rocks with grain size 0.2-0.8 mm, feldspar with grain size up to 0.8 mm, and specific weight percentages (25-50% rocks, 37-75% feldspar). This controlled parameter variation ensures that heat resistance is improved while maintaining the required hardness and abrasion resistance properties.
3Object-affected harmful factors
If feldspar content is increased to improve chemical resistance, then water absorption decreases to approximately 0.02%, but the mixture composition must be optimized to maintain structural integrity
Solution Approach 1:
The patent formulates a composite aggregate mixture where feldspar (37-75 wt%) provides chemical resistance and low water absorption (0.02%), while metamorphic hard rocks (25-50 wt%) contribute hardness and structural strength. The synergistic combination of these materials maintains both chemical durability and structural integrity, preventing the trade-off that would occur with single-material systems.
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 composition achieves significantly higher heat resistance and chemical resistance, allowing use in kitchen areas with improved abrasion and water resistance.
Implementation Method 1
bound by a curable polymer... bound in a manner known per se using a suitable heat-curing polymer, which is preferably added to the mixture in an amount of 9 to 12 wt.% before the mixture containing the binder is cured in a mold under heat and pressure
Implementation Method 2
suitable for the production of a block, slab, board or plate by vibration compaction
Implementation Method 3
compact the mixture in a mold using mechanical pressure until it is pore-free
Implementation Method 4
cured in a mold under heat and pressure in the usual way... heat-curing polymer... before the mixture containing the binder is cured in a mold under heat and pressure
Data Source
AI summary
The invention relates to a work top made of a mixture of finely granulated rock and optionally at least one additive which influences the outer appearance, said mixture being bonded using a curable polymer. In order to achieve good heat resistance, the mixture has 25 to 50 wt.% of a rock from a group of rocks including metamorphic hard rocks, granite, gabbro, and vulcanite with a grain size ranging between 0.2 and 0.8 mm, 0 to 20 wt.% of a granulated glass, and 37 to 75 wt.% of a feldspar with a grain size of up to 0.8 mm.