ProTear Elmendorf Electronic Tearing Tester

The Elmendorf Tear Testers are essential in materials quality control, providing more information on tearing properties than any other instrument. They are recognised as the worldwide standard and are the best way to measure accurately the tear resistance of sheet materials including paper, packaging, foils, textiles, non-wovens and plastic films.

Operation – The tearing resistance of a material is measured via the transference of the potential energy stored in the raised pendulum to kinetic energy. A portion of this energy is absorbed during the tearing of the sample and is used as a measure of the material’s resistance to a continuing tear. The force required to tear the sample is reported as a percentage of the pendulum capacity, mN, g or lb.

The electronic ProTear tester is distinguished by good design, ease of operation and menu-driven software, which enable crucial data to be obtained in seconds. Specimen data can be input as thickness; g/m2; number of plies being torn; MD/CD direction and an indication of the results of the pendulum capacity specific to the specimens, displayed in %, mN or g.

There are several configurations ranging from 200 to 6400 g, with capacities quickly and easily changed using augmenting weights, which both eliminate the need for multiple pendulums and simplify the testing of different materials.

Protear Elmendorf Electronic
Tearing Tester in Action

Features

• User-friendly, one-touch software offering:
  • test results that include tear strength, tear per ply, average tear strength and tear index
  • rapid sample data entry – thickness, basis weight, sample id and sample direction
  • a configurable display of test parameters, results and reports
  • ability to delete and restore test results
  • results displayed as a percentage of pendulum capacity, g, lb and mN
  • statistics including average, high, low, standard deviation, range and variance
• Digital encoder ensures accurate results – 0.2% accuracy of the pendulum capacity
• RS-232 data output
• One-touch pneumatic clamping and pendulum release

Options

• Augmenting weights – quick change of the pendulum capacities between 200 and 6400 g
• Calibration weights of 200, 400, 800, 1600, 3200 and 6400 g to verify instrument calibration
• Calibration certificates for augmenting weights and calibration weights
• Spencer Impact Attachment – measures the impact resistance of various materials, typically plastic film. Complies with ASTM D3420
• Data acquisition software (DAS) to capture serial data, customise it for specific requirements and then transfer it to any Windows application. Enables creation of graphs and reports that automatically update with real-time data

Specifications

Related Instruments and Attachments

ProTear Mechanical Tearing Tester		ProTear Heavy Duty Tearing Tester		Spencer Impact Attachment		Protear Cutter

For further information,