This article introduces a specialized tester designed to evaluate syringe plunger sliding performance, critical for ensuring smooth drug delivery and minimizing patient discomfort. The device measures frictional forces during simulated injection cycles, complying with global medical device standards. Key features include adjustable test speeds, automated friction mapping, and real-time data analysis.

Applicable Standards

Main Parameters

• Friction Force Range: 0-20N (resolution 0.001N)
• Sliding Speed: 50-500 mm/min (programmable profiles)
• Cycle Repeats: 1-1000 cycles (customizable)
• Data Output: Digital charts with COF calculations

Working Principle

The tester uses a linear actuator to drive plunger movement while a force sensor measures frictional resistance. A high-precision encoder tracks displacement, enabling calculation of coefficient of friction (COF). Software algorithms compensate for temperature variations, ensuring consistent results across testing environments.

Test Principles

1. Dynamic Friction Testing: Measures force during continuous sliding
2. Break-Away Analysis: Evaluates initial resistance at plunger activation
3. Wear Simulation: Assesses performance degradation over repeated cycles

This integrated solution enables manufacturers to optimize syringe designs for consistent glide performance, meeting USP Class VI biocompatibility standards while enhancing user experience through precise lubricity characterization.