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
| 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)
V. Applications
Textiles:Evaluating fabric abrasion and tear resistance
Plastics:Testing film and sheet material durability
Rubber:Measuring tire tread and industrial hose strength
Forensic Analysis:Documenting material failure causes
Standard Operation Workflow:
Sample Preparation: Cut to specified dimensions
Clamping: Secure sample in vise with 50N force
Calibration: Zero-force adjustment via digital gauge
Testing: Release pendulum and record peak force
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
Qinsun Instruments Co., LTD is a professional laboratory testing instrument manufacturer in China,Have been focusing on laboratory instrument R&D more than 30 years and have rich industry experience,Based on international testing standards,We are also the instrument supplier for BV SGS laboratory,We provide one-stop solutions for lab instruments,Free Training and Turn-Key Service,Products exported all over the world,Offer 36 month warranty and are a trustworthy partner.
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