Double Pendulum Digital Tear Tester

The double pendulum digital tear tester is mainly used to measure the ability of various fabrics (such as clothing fabrics, home textile fabrics, etc.) to resist tearing.

Applications

Textile industry:

It is widely used in fabric production and clothing manufacturing to help manufacturers and quality inspection agencies detect fabric quality and ensure that the products meet relevant standards and usage requirements.

Research field:

Researchers use this instrument to study the effects of different fibers, fabric structures and other factors on tearing performance in order to develop new high-performance fabrics.

Standards

BS EN ISO 13937 Textiles. Tear properties of fabrics. Determination of tear strength by impact pendulum method (Elmendorf)

BS EN ISO 4674-2 Rubber or plastic coated fabrics. Determination of tear resistance. Impact pendulum method

ASTM D5734 Test method for tear strength of nonwoven fabrics using a falling weight (Elmendorf) test apparatus

GB/T 455 Determination of tear strength of paper and paperboard. Complies with multiple test standards.

BS EN ISO 21974 Plastics. Determination of tear properties by pendulum impact. Part 2. Impact test with measuring instruments.

GB/T 3917.1 Textiles. Tear properties of fabrics. Part 1: Determination of tear strength by impact pendulum method.

ASTM D689-96a Test of tear strength of paper.

TAPPI T414 om-12 paper. Determination of tear strength (Elmendorf method)

ASTM D1424 Impact Pendulum Method for Determining the Tear Strength of Fabrics

NEXT 17 Tear Strength Testing

DIN EN 21974 Paperboard – Determination of Tear Resistance (Elmedorf Method)

DIN EN ISO 13937-1 Textiles – Determination of Tear Properties of Fabrics (Elmedorf Method)

DIN EN ISO 1974 Paper – Tear Resistance – Elmedorf Method

DIN EN ISO 6383-2 Plastics – Films – Part 2: Elmedorf Method

Features

High Precision and Wide Measuring Range:

The dual pendulum structure combined with a calibration system ensures testing accuracy while covering a wide measuring range from low loads (such as thin-film rubber) to high loads (such as heavy fabrics).

Ease of Operation:

A touchscreen LCD interface simplifies operation, while safety pins and two-hand buttons ensure operator safety.

Intelligent Data Processing:

PC connectivity and Excel export functionality support in-depth data analysis, and automatic report printing improves work efficiency.

High Adaptability:

Flexible fixture and combination weight design meet the testing needs of different materials and thicknesses.

Durability and Maintainability:

A weighted base plate and hardened blade design extend the instrument's lifespan and reduce long-term operating costs.

Technical Parameters

Accessoriess

Elmendorf-style dual impact pendulum

Spring-loaded sample holder

Tungsten carbide cutting blade

Multi-weight counterweights (for achieving impact force testing from 200-30000cN)

Digital display unit

Test Procedures

1. Sample Preparation

Cut samples to the required dimensions according to the corresponding test standard (e.g., ASTM D1424. GB/T 455. etc.) (applicable to materials such as fabrics, plastics, and cardboard).

2. Sample Clamping

Secure the prepared sample flat on the instrument's spring clamps, ensuring the sample is wrinkle-free and firmly clamped.

3. Sample Cutting

Use a tungsten carbide blade to cut a standard 20mm slit in the sample (matching the instrument's cutting parameters).

4. Counterweight Setting

Install counterweights of appropriate weight according to the required impact force range and adjust the test setting.

5. Instrument Calibration

Zero the instrument without a sample to ensure accurate measurement reference.

6. Test Start

Release the pendulum, using its kinetic energy to apply impact tearing force to the sample until it is torn to the specified length of 43mm.

7. Data Recording

Read the tearing force value displayed on the instrument's digital display to complete a single test.

8. Results statistics

Repeat the test on multiple parallel specimens of the same sample, calculate the average value of the test results, and use it as the final tear resistance data.