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Manual Tear Strength Tester

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

ParameterSpecifications
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)

V. Applications

  1. Textiles:Evaluating fabric abrasion and tear resistance
  2. Plastics:Testing film and sheet material durability
  3. Rubber:Measuring tire tread and industrial hose strength
  4. Forensic Analysis:Documenting material failure causes

Standard Operation Workflow:

  1. Sample Preparation: Cut to specified dimensions
  2. Clamping: Secure sample in vise with 50N force
  3. Calibration: Zero-force adjustment via digital gauge
  4. Testing: Release pendulum and record peak force
  5. Analysis: Calculate tear energy (J/m²) or force (N)

Safety Precautions:

  • Wear gloves when handling sharp-edged samples
  • Avoid loose clothing near moving pendulum
  • Secure weights to prevent slippage

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