Overview
Paper Tear Strength meter is a special instrument for measuring paper Tear strength. Its technical indicators and performance parameters comply with ISO 1974 "Determination of Paper - Tear Strength (Alimondoff Method) " and GB 455.1 "Determination of Paper Tear Strength" and other standards. It is suitable for industries and departments such as papermaking, scientific research and product mass supervision and inspection.
Features
1. Measurement range covers 10~ 1000mN, providing three configurations of standard pendulum, light pendulum and lightest pendulum to meet different test needs.
2. Indication Error is small, the error is +/- 1% in the range of 20% to 80% of the upper limit of the Measurement range, and +/- 0.5% FS outside the range.
3. Low indication repeatability error, ≤ 1% in the range of 20% to 80% of the upper limit of the Measurement range, ≤ 0.5% FS outside the range.
4. Key parameters such as tearing arm, tearing initial angle, tearing distance, etc. are precisely designed to meet standard requirements.
Principle
The instrument works based on the principle of the Ellemendorf method. During the test, the specimen is clamped on the instrument and the paper is torn by the potential energy released by the pendulum. The instrument measures the force required to tear a certain distance (43 +/- 0.5mm), which is converted into a Tear Strength value by the pendulum's swing angle or force value display system to evaluate the tear resistance of the paper.
Applications
Paper industry, scientific research institutions, product mass supervision and inspection departments
Standards
ISO 1974 "paper - Determination of Tear Strength (Alimondorf Method) ", GB 455.1 "Determination of Paper Tear Strength"
Steps
1. According to the expected Tear strength of the paper to be tested, select the appropriate pendulum (standard pendulum, light pendulum or lightest pendulum) and install it.
2. Adjust the instrument to ensure that the pendulum is in its initial position (tearing initial angle 27.5 +/- 0.5 °).
3. Cut the specimen to the specified size and carefully hold it between the paper jacks of the instrument (the paper size is 25 * 15mm, and the paper jacks are spaced 2.8 +/- 0.3mm).
4. Release the pendulum to allow it to swing freely to tear the specimen.
5. Read and record the Tear Strength value displayed by the instrument.
6. Conduct multiple tests and calculate averages to obtain reliable results.
Notice
• Please read the manual carefully before use to ensure correct operation.
• Select the appropriate pendulum range according to the estimated Tear strength range of the sample to ensure Measurement accuracy.
When clamping the sample, ensure that the sample is flat, centered, and the clamping force is moderate to avoid sliding or premature damage.
• Regularly calibrate and maintain the instrument to check whether the pendulum bearing, pointer or display system is normal.
• The test environment should be kept stable to avoid interference factors such as strong airflow and vibration.
The instrument should be placed on a stable workbench for use.
