Coating composition and cooking appliance
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Solution Overview
Problem
Cooking appliances with traditional enamel coatings are prone to germ propagation and infiltration, which can contaminate food, necessitating a novel coating composition that inhibits germ growth and improves cleaning efficiency.
Innovation Solution
A coating composition comprising glass frit with specific weight percentages of Phosphorus Pentoxide (P2O5), Silicon Dioxide (SiO2), Boron Oxide (B2O3), group I-based metal oxides, Barium Oxide (BaO), Sodium Fluoride (NaF), Titanium Oxide (TiO2), Stannous Oxide (SnO), and Zinc Oxide (ZnO), along with an adhesion enhancement component, is applied to the appliance's surfaces to enhance heat resistance, chemical resistance, and antibacterial properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional enamel coating is applied to cooking appliance surfaces, then heat resistance and chemical resistance are improved, but germ propagation and infiltration occur
Solution Approach 1:
The patent applies a composite coating material comprising glass frit with specific additives (silver oxide, zinc oxide, titanium oxide) combined with organic binder resin. This composite structure integrates the heat resistance of glass frit with the antibacterial properties of metal oxide particles, achieving both thermal stability and germ inhibition simultaneously.
Solution Approach 2:
The patent introduces silver oxide and other metal oxide particles at specific concentrations (silver oxide: 0.1-5 wt%, zinc oxide: 1-10 wt%) within the coating composition to provide localized antibacterial functionality. This allows different regions of the coating to have specialized properties - the glass frit matrix provides heat resistance while the metal oxide dispersed phases provide germ inhibition.
2Stability of the object's composition
If traditional enamel coating is applied to cooking appliance surfaces, then thermal stability is improved, but cleaning efficiency deteriorates
Solution Approach 1:
The patent modifies the chemical composition parameters of the glass frit by adding specific metal oxides (silver oxide, zinc oxide, titanium oxide) at controlled concentrations. These parameter changes enhance the coating's antibacterial properties and cleaning characteristics while maintaining the thermal stability provided by the glass frit base structure.
Solution Approach 2:
The coating composition includes organic binder resin and specific metal oxide additives that create a surface with inherent antibacterial and easy-cleaning properties. The coating itself provides the cleaning functionality through its composition, eliminating the need for additional complex cleaning mechanisms or procedures.
3Ease of manufacture
If glass frit is pulverized through dry-type or wet-type process to form glass powder, then coating material is prepared, but germ infiltration into food occurs in sealed space
Solution Approach 1:
The patent uses organic binder resin as an intermediary substance that binds the glass frit powder and metal oxide particles together to form a cohesive coating layer. This intermediary material creates a continuous protective barrier that prevents germ infiltration while allowing the coating to be applied through conventional processes.
Solution Approach 2:
The coating composition forms a composite structure where glass frit provides the base matrix, metal oxide particles provide antibacterial functionality, and organic binder resin provides cohesion and adhesion. This composite material simultaneously achieves ease of manufacture through conventional coating processes and germ inhibition through the metal oxide components.
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 coating composition effectively prevents germ multiplication, facilitates easy cleaning with water, maintains thermal stability, and ensures the appliance's surfaces remain resistant to contamination and bacterial growth, while maintaining the appliance's endurance and cleaning performance.
Implementation Method 1
the glass frit may include ZnO, and the TiO2 and the ZnO may be included at a specific weight ratio. Accordingly, it has been experimentally confirmed that the glass frit having a specific composition range may have improved antimicrobial characteristics
Implementation Method 2
the glass frit may include TiO2 and ZnO, and the TiO2 and the ZnO may be included at a specific weight ratio
Implementation Method 3
enamel is produced by coating vitreous glaze onto a surface of a metallic plate. After preparing an enamel material, that is, glass frit, the glass frit is pulverized through a dry-type process or a wet-type process, thereby forming a glass powder. Then, the glass powder is coated on a target to form an enamel layer. The enamel layer may be formed after the glass powder is coated and subject to a plastic process at a specific temperature.
Data Source
AI summary
A coating composition may include a glass frit including Phosphorus Oxide (P2O5), Silicon Oxide (SiO2), Boron Oxide (B2O3), a group I-based metal oxide, Barium Oxide (BaO), Sodium Fluoride (NaF), Titanium Oxide (TiO2), Stannous Oxide (SnO), Zinc Oxide (ZnO), and an adhesion enhancement component. The P2O5 may be included by about 40 wt % to about 55 wt % based on a total weight of the glass frit. The SiO2 may be included by about 5 wt % to about 15 wt % based on the total weight of the glass frit. The B2O3 may be included by about 5 wt % to about 10 wt % based on the total weight of the glass frit. The group I-based metal oxide may be included by about 3 wt % to about 10 wt % based on the total weight of the glass frit. The ZnO may be included by about 10 wt % to about 25 wt % based on the total weight of the glass frit, and the TiO2 may be included by about 0.1 wt % to about 5 wt % based on the total weight of the glass frit.