High-Whiteness MGO Substrate Bonding Strength
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Solution Overview
Problem
Magnesium oxide fireproof boards (MGO boards) suffer from low internal bonding strength, leading to peeling and cracking when slotted, which affects their practicality.
Innovation Solution
A high-whiteness MGO substrate is developed using light-burned magnesium oxide, magnesium sulfate heptahydrate, polyvinyl alcohol, and a specific modifier ratio, along with plant powders, to enhance internal bonding strength and prevent peeling and cracking, with a preparation method involving bleaching, steam treatment, and flat-pressing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If glassfiber mesh fabric is used as reinforcing material, then toughness is improved, but internal bonding strength decreases leading to peeling and cracking
Solution Approach 1:
The patent uses a composite material system combining magnesium oxide powder, magnesium sulfate heptahydrate, polyvinyl alcohol solution, and plant powder to create a substrate that achieves both toughness and high internal bonding strength, replacing the glassfiber mesh fabric reinforcement approach
Solution Approach 2:
The patent changes the chemical composition parameters by using light-burned magnesium oxide with ≥85% MgO content and >65% reactive MgO, along with specific ratios of magnesium sulfate heptahydrate (18-25 parts) and polyvinyl alcohol solution (16-25 parts), to optimize both bonding strength and toughness
2Ease of manufacture
If traditional MGO board formulation is used, then manufacturing simplicity is maintained, but internal bonding strength is insufficient causing peeling at slotted positions
Solution Approach 1:
The patent modifies the formulation parameters by using light-burned magnesium oxide with specific purity (≥85% MgO) and reactivity (>65% reactive MgO), combined with magnesium sulfate heptahydrate (18-25 parts) and polyvinyl alcohol solution (16-25 parts), to achieve high bonding strength while maintaining ease of manufacture
Solution Approach 2:
The polyvinyl alcohol solution acts as a binder and film-forming agent that mediates between the magnesium oxide particles and plant powder, creating strong internal bonds that prevent peeling while maintaining simple manufacturing processes
3Strength
If more light burned magnesium oxide is used, then internal bonding strength is improved, but production cost increases
Solution Approach 1:
The patent creates a cost-effective composite formulation where light-burned magnesium oxide (40-49 parts) is combined with magnesium sulfate heptahydrate (18-25 parts) and plant powder (16-20 parts), achieving high bonding strength while optimizing material costs through synergistic interactions
Solution Approach 2:
The patent optimizes the quantity of light-burned magnesium oxide to 40-49 parts in the formulation, balancing the need for high bonding strength with production cost considerations, while leveraging the high reactivity (>65%) of the light-burned MgO to maximize performance per unit cost
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 substrate exhibits improved internal bonding strength, reduced bubble formation, and extended service life, allowing for increased production efficiency and reduced costs, while the decorative boards show enhanced durability and resistance to peeling and cracking.
Implementation Method 1
the polyvinyl alcohol solution is used as a binder and has a good film-forming property so as to wrap the light burned magnesium oxide and the plant powder
Implementation Method 2
the modifier with such mass ratio is dissolvable in water and has good stability and corrosion resistance
Implementation Method 3
the selected plant powder with such fineness can disperse well during preparation of the substrate, and can be easily and uniformly mixed with other components in the substrate
Data Source
AI summary
The application discloses a high-whiteness MGO substrate, a preparation method thereof and a decorative board having the substrate. The high-whiteness MGO substrate includes a surface layer and a substrate, wherein the substrate is prepared from a forming agent, a lightweight filler, a modifier and water in parts by mass as follows: 40-49 parts of light burned magnesium oxide powder, 18-25 parts of magnesium sulfate heptahydrate, 16-25 parts of a polyvinyl alcohol solution, 16-20 parts of a plant powder, and 0.5-2 parts of a modifier; the modifier being obtained by mixing citric acid, phosphoric acid, and sodium sulfate in a mass ratio of 10:3:6.