This article presents a specialized tester designed to evaluate the resilience of rubber sleeves on blood collection needles, critical for ensuring proper sealing and functionality after repeated use. The system measures the sleeve's ability to return to original dimensions after compression, complying with medical device quality standards.

Applicable Standards

Main Parameters

• Compression Force: 5-50N (adjustable)
• Deflection Range: 0-50% sleeve diameter
• Cycle Repeats: 1-10,000 cycles (programmable)
• Recovery Measurement: Laser displacement sensor (±0.01mm accuracy)

Working Principle

The tester uses a pneumatic actuator to compress the rubber sleeve between two parallel plates, simulating clinical insertion forces. A high-resolution camera captures dimensional changes while a load cell monitors applied force. Software algorithms calculate resilience as percentage recovery from compressed state.

Test Principles

1. Compression-Rebound Cycling: Evaluates fatigue resistance
2. Dynamic Stress Relaxation: Measures creep under constant load
3. Dimensional Stability Analysis: Verifies post-compression geometry

This integrated solution enables manufacturers to optimize sleeve materials for enhanced sealing performance, meeting FDA QSR requirements while ensuring patient safety through precise resilience characterization.