Scratch-Masking Composition for Cold Wet Containers
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Solution Overview
Problem
Existing scratch and scuff masking agents for glass and PET containers are ineffective on cold and wet surfaces, leading to poor performance and aesthetic issues due to condensation, hygroscopicity, and incompatibility with cold filling processes, which affects the reuse and appearance of containers.
Innovation Solution
A composition comprising a carboxylic acid ester, a nonionic surfactant, and a monounsaturated fatty acid, applied as an emulsion that is water-resistant, non-toxic, and easily removable with alkaline washing, suitable for use on cold glass and PET containers, including those filled with cold liquids and subject to condensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional masking agents are applied to cold and wet container surfaces, then the containers can be processed efficiently, but the masking agents show poor performance and are rinsed off due to condensation water
Solution Approach 1:
The patent changes the physical and chemical parameters of the masking composition by using a solvent system specifically designed to remain effective on cold surfaces (below 25°C) and resist dilution by condensation water. The composition is formulated to maintain proper viscosity and adhesion properties at low temperatures, preventing it from being rinsed off during filling operations.
Solution Approach 2:
The patent applies different properties to different aspects of the masking system: the composition is designed to be water-resistant and non-hygroscopic to prevent dilution by condensation, while simultaneously being removable by alkaline washing solutions. This local differentiation of properties allows the coating to persist during filling but be easily removed during cleaning.
2Ease of manufacture
If heat is applied to dry the coating, then the masking agent dries effectively, but the product temperature rises which may deteriorate organoleptic properties
Solution Approach 1:
The patent replaces the thermal drying process with a low-temperature evaporation process. The solvent system is designed to evaporate at ambient or refrigerated temperatures, eliminating the need for heat application. This substitution allows the coating to dry effectively without raising the product temperature, thereby preserving organoleptic properties.
3Reliability
If the masking agent is water-resistant and durable, then it masks scratches effectively, but it becomes hygroscopic and sticky attracting dust
Solution Approach 1:
The patent carefully selects and balances the parameters of the solvent system and polymer matrix to achieve the desired property profile. The composition uses specific solvents and polymers that provide water resistance and durability while maintaining low hygroscopicity. The formulation parameters are optimized to prevent the coating from becoming sticky or attracting dust, even while maintaining effective scratch masking.
4Ease of operation
If the coating is designed to be easily removed by alkaline washing, then it can be cleaned efficiently, but it may not provide sufficient durability during use
Solution Approach 1:
The patent creates a dynamic coating system that responds differently to different chemical environments. The coating is formulated to be stable and durable in the presence of water and condensation during filling operations, but becomes readily removable when exposed to alkaline washing solutions. This dynamic behavior allows the same coating to provide both durability during use and ease of removal during cleaning.
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 composition effectively masks scratches and scuff marks on containers, maintaining appearance and durability while being compatible with conveyor lubricants and resistant to water immersion, ensuring the coating remains effective even after condensation and washing.
Implementation Method 1
The composition includes a carboxylic acid ester, surfactant, and a monounsaturated fatty acid
Implementation Method 2
The composition effectively masks scratches and scuff marks on containers, maintaining appearance and durability while being compatible with conveyor lubricants and resistant to water immersion
Data Source
AI summary
A composition for masking scratches on container surfaces is provided including carboxylic acid ester, surfactant, and monounsaturated fatty acid. The composition is suitable for masking scratches on reusable containers such as glass or PET bottles. The composition is suitable for applying to cold wet surfaces where condensation has resulted. A method for making and applying such scratch-masking composition is also provided.