Halogenated Polyimide Siloxane Coating for Glass Durability
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Solution Overview
Problem
Glass pharmaceutical packages face mechanical damage issues due to high processing speeds, leading to increased breakage and sterility concerns, with existing tempering techniques being ineffective in improving resistance to abrasions and scratches.
Innovation Solution
A low-friction coating comprising a halogenated polyimide chemical composition with a siloxane moiety is applied to glass containers, providing improved mechanical durability and resistance to frictive damage, while maintaining thermal stability and adhesion even after exposure to elevated temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If glass packages are subjected to high processing speeds during manufacture and filling, then productivity increases, but mechanical damage such as abrasions occurs, decreasing package strength
Solution Approach 1:
A low-friction coating is applied to the glass package surface before processing to provide protective cushioning against abrasions and mechanical damage that occur during high-speed handling and filling operations
Solution Approach 2:
The low-friction coating acts as an intermediary layer between the glass package surface and external processing equipment, reducing direct contact friction and preventing mechanical damage during high-speed operations
2Strength
If thermal tempering is used to strengthen glass packages, then resistance to blunt impacts improves, but resistance to abrasions and scratches remains insufficient
Solution Approach 1:
The solution combines thermally tempered glass with a low-friction coating layer to create a composite structure that provides both impact resistance from the tempered glass and superior abrasion resistance from the coating
Solution Approach 2:
The low-friction coating provides localized abrasion resistance specifically at the glass surface where mechanical contact occurs, while the bulk glass maintains its impact resistance properties from thermal tempering
3Adaptability or versatility
If chemical tempering is used to strengthen glass packages, then complex geometries and thin walls can be handled, but abrasion resistance is not significantly improved
Solution Approach 1:
The low-friction coating is applied over chemically tempered glass to create a composite structure that maintains the geometric adaptability benefits of chemical tempering while adding the required abrasion resistance through the coating layer
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 halogenated polyimide siloxane coating significantly reduces the coefficient of friction, enhancing the mechanical strength and durability of glass containers, preventing frictive damage and maintaining properties through thermal treatments, thus addressing the mechanical durability concerns in pharmaceutical packaging.
Implementation Method 1
low-friction coating bonded to at least a portion of the first surface of the glass container. The low-friction coating may comprise a polyimide chemical composition. The polyimide chemical composition may be halogenated and the polyimide chemical composition may comprise a siloxane moiety
Data Source
AI summary
As described herein, a polyimide chemical composition may be used for coating glass articles. According to embodiments, a coated glass article may include a glass container which may include a first surface and a second surface opposite the first surface, and a low-friction coating bonded to at least a portion of the first surface of the glass container. The low-friction coating may include a polyimide chemical composition. The polyimide chemical composition may be halogenated and the polyimide chemical composition may include a siloxane moiety.