Polyester-Coated Medicament Canister With Low-Temperature Curing
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Solution Overview
Problem
Existing medicament canister coatings, such as fluoropolymers, are environmentally harmful and costly, and traditional coating processes risk damaging the canister or result in inefficient manufacturing due to high temperatures and improper drying/curing.
Innovation Solution
A method involving a solvent-based polyester coating applied to a pre-formed medicament canister, with specific temperature-controlled drying and curing processes to ensure proper adhesion and minimize material deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluoropolymer coatings are used to protect the canister interior surface, then the coating provides good protection against degradation and prevents medication deposition, but the coating composition becomes harmful to the environment and costs increase
Solution Approach 1:
The patent changes the chemical composition parameters of the coating from fluoropolymer to polyester coating composition, maintaining protective functionality while eliminating environmental harm. The polyester coating provides comparable adhesion and protection properties without the harmful environmental effects of fluoropolymers.
2Ease of manufacture
If high temperatures are used to dry and cure aqueous polyester coatings, then the coating can be applied, but the manufacturing process becomes less efficient and more costly with risk of coating damage
Solution Approach 1:
The patent changes the temperature parameters from high temperature (required for aqueous coatings) to lower temperature processing for solvent-based coatings. This eliminates the risk of coating damage and overheating while improving manufacturing efficiency and reducing costs.
Solution Approach 2:
The patent uses a solvent-based coating that can be applied at lower temperatures, eliminating the need for expensive high-temperature curing infrastructure and reducing manufacturing costs while maintaining coating quality.
3Reliability
If the canister is formed after coating application, then coating adhesion may be compromised, but forming the canister before coating increases the risk of damaging the coating during formation
Solution Approach 1:
The patent applies the coating to the canister after formation, ensuring the canister structure is already established and won't be damaged during formation. The solvent-based coating is applied as a final step before assembly, guaranteeing both structural integrity and coating adhesion.
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 method provides a reliable, environmentally friendly coating that adheres well to the canister surface, reducing manufacturing costs and risks, while maintaining the canister's structural integrity.
Implementation Method 1
heating an oven to a temperature between about 290° C. and about 300° C. and annealing the canister in the heated oven for between about 4 minutes to about 4 minutes and 30 seconds to burn off residue from the interior surface of the canister
Implementation Method 2
exposing the canister to a first temperature to dry the polyester coating
Implementation Method 3
exposing the canister to a second temperature to cure the polyester coating
Data Source
AI summary
A method of preparing a medicament canister may include providing a canister (102) having a base wall (104), an open end (108) opposite the base wall, a side wall (106) extending between the base wall and the open end, and an interior surface defined by the base wall and the side wall. The side wall may include a neck portion (114) extending around the open end. The canister may be composed of a metal material. The method may include heating an oven to a temperature between about 290° C. and about 300° C., annealing the canister in the heated oven to burn off residue from the interior surface of the canister, applying a layer of a polyester coating to the interior surface of the canister, exposing the canister to a first temperature to dry the polyester coating, and exposing the canister to a second temperature to cure the polyester coating.