Elmendorf Tearing Strength Tester - lab instrument
I. Product Overview
TheManual Tear Strength Testeris a precision instrument designed to measure the tear resistance of materials using standardized methods such as the Elmendorf or tongue tear test. It evaluates the force required to propagate a tear in textiles, plastics, rubber, and composites, ensuring compliance with international quality standards.
Type:Mechanical pendulum tear tester
Test Standards:ASTM D1424 (Elmendorf), ISO 34 (Tongue method)
Tear Modes:
Elmendorf:Single-edge tear propagation
Tongue:Central slit expansion
Capacity:50–5000 mN (adjustable via pendulum weights)
Sample Size:63×127mm (Elmendorf) / 50×200mm (Tongue)
II. Technical Specifications
| Parameter | Specifications |
|---|---|
| Pendulum Range | 160–640 g (9 different weights) |
| Clamping Force | 50±5 N (adjustable via screw mechanism) |
| Tear Speed | 1.2±0.2 m/s (controlled by pendulum drop height) |
| Measurement Accuracy | ±1% FS (ISO 376 standard) |
| Dimensions | 800×400×1200mm (L×W×H) |
III. Key Features
Dual Test Modes:
Elmendorf Test:High-speed single-edge tear
Tongue Test:Simulates real-world stress cracks
Advanced Features:
Digital force gauge (0.1N resolution)
Auto-zero calibration system
Anti-slip clamping jaws
Manual Operation:
Cranks for pendulum lifting (no electricity required)
Ratchet safety lock
Modular weights for customization
IV. Compliance Standards
ASTM D1424 (Textile tear resistance)
ISO 34 (Plastics and rubber tear methods)
EN ISO 6383-2 (Rubber tear strength)
GB/T 3917.1 (Chinese textile standard)
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