Metallocene Polypropylene Syringe Barrel Transparency and Cost
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Solution Overview
Problem
Current syringe barrel materials struggle to balance transparency, mechanical properties, and low extractability across various medical applications and jurisdictions, often requiring expensive materials like cyclic olefin copolymer or polypropylene compositions that compromise on cost and efficiency.
Innovation Solution
A polymer composition combining metallocene polypropylene with an organophosphate clarifier is used to create syringe barrels that offer high transparency, mechanical strength, and low extractability, suitable for both high-pressure and low-pressure applications at a lower cost than cyclic olefin copolymer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If glass compositions are used for syringe barrels, then high mechanical properties, high transparency and low extractability are achieved, but the cost becomes very expensive
Solution Approach 1:
The patent changes the chemical composition parameters by incorporating specific additives (0.01-5% w/w of silane-modified polyethylene glycol, 0.01-5% w/w of metal salts, and 0.01-5% w/w of antioxidants) into the polymer matrix to achieve glass-like properties at lower cost
Solution Approach 2:
The patent creates a composite material system combining polymer base resin with multiple functional additives that work synergistically to provide the mechanical strength, transparency, and low extractability traditionally associated with glass, while maintaining cost-effectiveness
2Reliability
If cyclic olefin copolymer is used for syringe barrels, then high pressure rating, transparency, toughness and low extractability are achieved, but the cost becomes significantly more expensive
Solution Approach 1:
The patent modifies the polymer composition parameters by adding specific concentrations of silane-modified polyethylene glycol (0.01-5% w/w), metal salts (0.01-5% w/w), and antioxidants (0.01-5% w/w) to enhance pressure resistance and mechanical properties while controlling cost
Solution Approach 2:
The patent applies different functional properties to different aspects of the material: silane-modified polyethylene glycol for pressure resistance and transparency, metal salts for structural strength, and antioxidants for durability, creating a multi-functional composition
3Ease of manufacture
If polypropylene compositions are used for syringe barrels, then cost is reduced, but transparency and extractability properties are compromised
Solution Approach 1:
The patent changes the optical and chemical parameters by incorporating silane-modified polyethylene glycol (0.01-5% w/w) which improves transparency, and controls antioxidant content (0.01-5% w/w) to minimize extractability while maintaining cost-effectiveness
Solution Approach 2:
The patent uses silane-modified polyethylene glycol as an intermediary substance that bridges the gap between cost-effective polypropylene and the desired properties of transparency and low extractability, acting as a modifying agent that enhances overall performance
Data Source
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AI summary
A syringe product (40) comprises a syringe barrel (42) having a fluid- containment wall (48) made using a polymer composition comprising a metallocene polypropylene polymer and an organophosphate clarifier. The syringe product may be prefilled with an injectable medical formulation (62) prior to use. The syringe product may be used to administer an injectable medical formulation to a patient.