Elmendorf Tear Tester

Used to test the tear strength of sheet materials such as wrapping paper, writing paper and plastic film, composite films, textiles and non-woven fabrics. The average value of the force required to continue the tear of the pre notched specimen to a given length. (according to the initial sample longitudinal or transverse incision said measurement results, unit mN, tear index for quantitative tearing divided by the sample results in milli Newton m2 / g mN m2/g) instrument equipped with optical rotary encoder, the position of the swing angle measurement of tear during operation.

Product features

Using high precision angle sensor, the resolution is 0.1mN, to ensure the accuracy of the test error within 1%, the instrument is currently the highest accuracy, and the user can self weight of indication instrument is the tear test.

The accompanying weighing weight may at any time for easy calibration, built-in pendulum shaft friction compensation device to reduce the influence of the friction test, make the results more accurate and stable.

Chinese LCD display, friendly man-machine interface, automatic completion of testing, with the test data statistical processing, printer output, automatic pendulum release control as well as the results of the automatic memory and display, reduce the human error, which is easy to operate, stable and correct the results.

The instrument with special calibration weights, built-in calibration procedures for measurement and calibration Department (third party) for calibration of the instrument calibration, enter the calibration test program, the calibration weight is screwed into the screw hole of the calibration, you can easily make error calibration.

Technical index

Measuring range: light swing (50~6500) mN; pendulum (500~10000) mN

Resolution: 0.1mN

Indication error: + 1%

Variation of indication: less than 1%

Arm of the tearing force: (104 + 1) mm

Tear initial angle: (27.5 + 0.5) degrees

Distance between paper clips: (2.8 + 0.3) mm

Specimen cut length: (20 + 0.5) mm

Test description

With uniform sampling equipment from the sample cut sample (63 * 50 + 0.5mm + 2mm), according to the sample selection will be put to put, the initial position with the lock pin is fixed, the specimen half facing the knife, the other half at the opposite side edge knife, samples should be neat, the complete contact with the bottom of the clip. The clamping cutter with the sample cut a neat edge, the knife back to rest position, then release pressure when the hem, pendulum swing back, by hand, to the initial position with the lock pin fixed, read the display value, loosen the clamp removed specimen has been torn, ready for the next test report. Results three digits.

Note: 1, when there are 1~2 specimens in the test line and the end of the tear line extension left and right deviation of more than 10mm, should be discarded, do not remember, repeated tests, until 5 satisfactory results. If more than two specimens are deflected by more than 10mm, the result may be retained, but the deviation shall be indicated in the report. If a tear occurs during the tear, instead of tearing in the normal position, the tear shall be treated as described above.

2, the determination of the number of layers should be 4 layers, if not satisfied with the results, may be appropriate to increase or decrease the number of layers, but should be explained in the report.

3. Sampling should be taken according to the vertical and horizontal direction of the sample. If the material is vertical and the short edge of the sample is flat, lateral tests shall be carried out, otherwise longitudinal tests shall be carried out, and at least 5 effective tests shall be carried out in each direction.

Applicable standard

GB/T455

ISO1974

TAPPI T414 T496

DIN EN 21974

DIN EN 21974

DIN EN ISO 6383-2

DIN EN ISO 13937-1

Device parameter

Chinese measurement and control LCD screen life: about 50 thousand hours

AC220V + 22V, 50Hz and 0.5A shall be reliably grounded

Overall dimensions (L * w * h): (450 * 330 * 440) mm

Net weight: 20Kg

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Flmendorf Tear Tester