Room-Temperature Sol-Gel Coating for Glass Container Strength
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Solution Overview
Problem
Existing methods for strengthening glass containers are inefficient and costly, as they require high-energy processes and cannot uniformly apply sol-gel materials to exterior surfaces for reliable results.
Innovation Solution
A room-temperature-curable cold-end coating process using a solution of an amphiphile, solvent, catalyst, and water is applied to glass containers at a low temperature, filling surface imperfections and providing a monolithic silica coating that increases strength without the need for additional coatings or heat treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If high-energy processes and heat treatment are used to apply coatings to glass containers, then coating application is achieved, but energy consumption increases and process complexity increases
Solution Approach 1:
The invention changes the temperature parameter from high-temperature processes (conventional heat treatment) to room temperature (20-25°C) application and curing. The sol-gel coating composition is specifically formulated to cure at room temperature through atmospheric moisture, eliminating the need for energy-intensive heating while achieving complete coating cure.
Solution Approach 2:
The invention replaces thermal energy-driven coating processes with a chemical self-curing mechanism. The sol-gel composition uses catalytic hydrolysis and condensation reactions that proceed spontaneously at room temperature, substituting mechanical/thermal systems with a chemical self-processing system that requires no external energy input for curing.
2Manufacturing precision
If sol-gel materials are applied to exterior glass surfaces using conventional methods, then coating is achieved, but uniform coverage cannot be obtained and additional coatings are required
Solution Approach 1:
The invention segments the coating composition into multiple functional components: sol-gel precursors (silane tetrafluoride, tetraethyl orthosilicate), surfactants for surface activity, catalysts for controlled curing, and solvents for proper viscosity. This segmentation allows each component to perform its specific function, resulting in uniform penetration and coverage in a single application.
Solution Approach 2:
The invention optimizes physical parameters including viscosity (0.5-5 cP), pH (3-7), and composition ratios to enable uniform penetration into glass surface imperfections. The controlled viscosity and surfactant content allow the coating to evenly distribute and penetrate surface pores, creating uniform coverage without requiring multiple application layers.
3Strength
If conventional coating methods are used to strengthen glass containers, then some strengthening is achieved, but burst strength and impact strength are not sufficiently improved
Solution Approach 1:
The invention creates a composite structure where the sol-gel derived silica coating integrates with the glass substrate. The coating forms a monolithic, cross-linked silica network that bonds chemically to the glass surface, creating a reinforced composite material with superior mechanical properties including enhanced burst and impact strength.
Solution Approach 2:
The coating composition specifically targets and penetrates surface imperfections, cracks, and pores in the glass substrate. By concentrating the sol-gel material at these critical defect locations and allowing it to cure in situ, the invention locally reinforces the weakest areas of the glass, significantly improving overall strength and reliability without adding significant weight.
4Use of energy by moving object
If room temperature curable coating is applied, then energy consumption is reduced, but curing time may increase
Solution Approach 1:
The invention introduces catalysts (acetic acid, hydrochloric acid, or other mineral acids) as intermediaries that accelerate the hydrolysis and condensation reactions of the sol-gel precursors. These catalysts enable the curing process to proceed rapidly at room temperature by lowering the activation energy barrier, achieving full cure within minutes to hours rather than extended periods.
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 process results in a cost-effective, thicker, and stronger glass coating with improved burst and impact strength, overcoming the limitations of conventional methods by providing uniform coverage and enhanced glass container durability.
Implementation Method 1
applying a solution including an amphiphile, a solvent, a catalyst, and water to the exterior glass surface of the glass container... such that the solution at least partially fills the surface imperfections
Implementation Method 2
allowing the solution applied in step (a) to cure on the exterior glass surface of the glass container, at a curing temperature between 5 and 40 degrees Celsius
Implementation Method 3
convert the metallosiloxane to a heat-treated polymetallosiloxane gel structure
Data Source
AI summary
A glass container and related methods of manufacturing a glass container. A solution having a composition including a silane, a solvent, a catalyst, and water, is applied to an exterior glass surface of the glass container, at an application temperature between 5 and 40 degrees Celsius, such that the solution at least partially fills the surface imperfections to provide a room-temperature-curable cold-end coating on the glass container. Then, the applied solution is allowed to cure on the exterior glass surface of the glass container, at a curing temperature between 5 and 40 degrees Celsius.