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

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