Decorative Glass Shatterproof Curtain Coating Process
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Solution Overview
Problem
Existing methods for producing decorative glass with chip retention functions on an industrial scale are plagued by defects such as cracks and blisters due to interactions between paint and resin layers, leading to inefficiencies and material losses.
Innovation Solution
A process involving successive curtain coating and heat treatment installations to ensure optimal temperature control of the glass surface before and after resin deposition, with the first heat treatment ranging from 50 to 120°C to prevent blisters and promote chip retention properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resin-based layers are deposited on existing decorative glass using the same deposition techniques as the paint layer, then chip retention function is achieved, but defects such as cracks and blisters occur due to interactions between paint and resin layers
Solution Approach 1:
The patent applies preliminary action by heating the glass substrate to a specific temperature range (50-120°C) before depositing the resin layer. This pre-heating step modifies the substrate conditions in advance to prevent defects during subsequent resin deposition and drying, thereby achieving chip retention function without cracks or blisters.
Solution Approach 2:
The patent changes the temperature parameter of the glass substrate to an optimal range (50-120°C) before resin deposition. This parameter modification controls the drying kinetics of both paint and resin layers, preventing harmful interactions that would otherwise cause defects while maintaining the chip retention function.
2Reliability
If film deposition is performed on large mirrors and lacquered glass at the silvering site, then safety function is achieved, but material losses increase due to the need to adapt film dimensions to final mirror dimensions
Solution Approach 1:
The patent merges the resin layer deposition process with the existing paint layer deposition line. By integrating both layers into the same curtain coating installation, the system can process large glass sheets at the silvering site without requiring separate film application equipment, thereby reducing material losses while maintaining safety function.
Solution Approach 2:
The patent makes the curtain coating installation multi-functional by using it for both paint layer deposition and resin layer deposition. This universal approach eliminates the need for separate safety film application equipment and allows optimal utilization of the existing deposition line, reducing material waste.
3Reliability
If multiple films are used for large mirrors and lacquered glass with partial overlapping, then safety function is achieved, but subsequent cutting becomes more difficult
Solution Approach 1:
The patent extracts the safety function from the concept of multiple overlapping films and implements it through a single continuous resin layer deposited by curtain coating. This eliminates the overlapping regions that complicate cutting operations while maintaining the chip retention function.
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
This process enables the production of decorative glass with improved chip retention and reduced defect rates, facilitating cost-effective and efficient industrial-scale production without compromising the integrity of the paint or resin layers.
Implementation Method 1
a first heat treatment installation in which the glass sheet coated with the layer of paint is subjected to a first heat treatment, the first heat treatment being such that the temperature of the surface of the glass sheet immediately before the deposition of the resin layer is within a range of 50 to 120°C.
Implementation Method 2
curtain coating is a deposition technique in which a curtain of a liquid composition is formed, here the liquid paint or liquid resin composition, the curtain falling onto a moving substrate, here the glass sheet.
Implementation Method 3
a second heat treatment installation, in which the glass sheet, coated with the layer of paint and the layer of resin, is subjected to a second heat treatment
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a method for obtaining decorative glass (1, 10) comprising a glass sheet (2) coated with a layer of paint (3) and with a layer of resin (4), in which the glass sheet (2) passes successively through a first curtain-coating unit (100), in which the layer of paint (3) is deposited on the glass sheet (2), followed by a first heat-treatment unit (110), in which the glass sheet (2) coated with the layer of paint (3) is subjected to a first heat treatment, and subsequently through a second curtain-coating unit (120), in which the layer of resin (4) is deposited on the layer of paint (3), followed by a second heat treatment unit (130), in which the glass sheet (2), coated with the layer of paint (3) and with the layer of resin (4), is subjected to a second heat treatment, the first heat treatment being such that the temperature of the surface of the glass sheet (2) immediately before the deposition of the layer of resin (4) is within a range from 50°C to 120°C.