Elmendorf Tear Tester TF140C
The Elmendorf Tear Tester is used to do fabric tear strength tests. It uses using pendulum tearing method, which determines the tearing resistance of fabric or paper by measuring the force value of a pendulum falling down at a certain starting height and tearing the textile sample or paper sample after converting all the potential energy into kinetic energy.
One of the most popular Elmendorf tear testers in the market is the Digital Elmendorf Tear Tester TF140C. The instrument adopts a color touchscreen display, pneumatic clamping of the specimen, automatic shear notch, automatic release of the pendulum, etc. This digital Elmendorf Test Instrument automatically detects and analyzes data, and can be configured with computer software for online tests. The tearing tester has the characteristics of high testing accuracy, high degree of automation, powerful, reliable performance, simple operation, etc.
Elmendorf tearing strength tester TF140C complies with ASTM D1424, BS ISO 13937-1, etc. TESTEX also provides other kinds of Elmendorf Tear Strength Tester. We also have upgraded Elmendorf Tear Tester which is equipped with IoT technology. Contact us for the Elmendorf tear tester price.
Application of Elmendorf Tear Tester TF140C
Digital Elmendorf Tear Tester TF140C is used to determine the tearing strength of the fabric, paper, cardboard, plastic cloth, film, electrical tape, aluminum foil, non-woven fabrics, complex flexible packaging, and other materials.
But, you should pay attention to this, Elmendorf tearing tester can not test thin fabrics or tensile materials because the direction of tearing may change during the test. In addition, the Elmendorf tear tester requires compressed air of 0.4~ 0.7 mPa.
Features of Elmendorf Tear Tester TF140C
Higher testing accuracy
Accuracy: ≤ ± 0.5% F-S, and advanced calculation method (potential energy method calculation) to ensure the accuracy and good repeatability of tearing test results.
Our Elmendorf Tear Tester is powerful with automatic tests, calculations, analysis of results, printable test reports, and uploading test data.
This tear tester is equipped with a pendulum friction damping automatic correction function to improve measurement accuracy.
Save time by reducing operation steps
Automatic sample cutting, pneumatic sample clamping, and pendulum release, to ensure consistent clamping force.
Multiple testing units to be chosen, such as GF, MN, CN, CP, LB, etc., adapt to different standard requirements.
Convenient, Touch screen control panel and clear image interface achieve more convenient and quick operation for tear testers.
Automatic compensation for friction and leveling errors, no slave pointer, and therefore no friction, alignment, and maintenance problems.
Specifications of Elmendorf Tear Test TF140C
- Capacity: 0-12800 grams (0 ~ 128N)
- Pendulum Range(CN): 0~ 1600, 0 ~ 3200, 0 ~ 6400, 0 ~ 12800
- Accuracy: ≤ ± 0.5%F•S
- Unit:N,cN,gf,lbf,kgf and mN
- Complete with work pendulums
1600cN/g (3.5lb), 3200cN/g (7.0lb), 6400cN/g (14.0lb), 12800cN/g(28.0lb)
- 2 pcs of Cutting blades
- 1 pc of Specimen cutting template
- TESTEX Elmendorf Tearing Test software
Weight of Elmendorf Tear Tester TF140C
Power of Elmendorf Tear Tester TF140C
|220/110 V||50/60 Hz||0.6-0.8 Mpa|
Dimensions of Elmendorf Tear Tester TF140C
|Length: 510 mm||Width: 620 mm||Height: 670 mm|
Standards of Elmendorf Tear Tester TF140C
|ASTM D1424||BS ISO 13937-1||GB/T 3917.1||ISO 4674-2|
Principle of Elmendorf Tear Test TF140C
The weight is lifted to a certain height, which has a certain potential energy; the dynamic and fixed grippers are aligned, the specimen is clamped between them, and the cutter cuts a mouth in the middle of the specimen. When the hammer is swinging down freely, the dynamic gripper and the fixed gripper are separated quickly, and the specimen is torn by the energy stored in the pendulum itself, and the control system gets the remaining potential energy of the pendulum after the specimen is torn, and calculates the energy consumed to tear the specimen, so as to get the force needed to tear the specimen.
Welcome to TESTEX – a professional textile testing instrument supplier – Elmendorf Tear Tester TF140C is on sale, contact us to get a detailed price quote. Of course， if you want to know more about the Elmendorf tearing strength test, you can communicate with us.
More about Elmendorf Tear Tests
After a period of wearing clothes, due to abrasion to make the yarn thin, the local yarn within the fabric is broken by the force and forms a crack. This phenomenon of fabric being torn apart under the action of the concentrated load is usually called tearing. The tearing strength of the fabric or Elmendorf tear strength is an important indicator of the textile. The instrument used to determine this index is called a fabric tearing strength tester. It is more widely known as the Elmendorf Tear Tester.
The fabric tear tester can be used to determine the tear strength of various fabrics. The fabric tearing tester is a must for all textile manufacturing and processing enterprises, as well as textile-related testing institutions. Because of its simple structure, ease of use, test data stability, and many other advantages, still in textile, paper, packaging, and many other industries are still used in large numbers. The difference is that each industry has a different standard of sample making.
Some related nicknames for the Elmendorf tear tester are: tear tester, tearing test, tear test, Elmendorf tester
, Elmendorf tear strength, Elmendorf tearing strength tester.
You can also get more knowledge about other fabric tearing strength tests.
What is the Tear of Fabric?
Elmendorf tear definition refers to the phenomenon that yarn inside the fabric breaks one by one and tears the fabric into a crack when a part of the fabric edge is subjected to concentrated loading.
The Elmendorf tear strength of textiles is affected not only by the fabric's properties but also by every finishing process of fiber. According to the actual development requirements of textiles, the American Society for Testing Materials (ASTM) has formulated a series of textile tearing strength standards (ASTM D1709, ASTM D1938, ASTM D1004 PDF, ASTM D1922 PDF, ISO 6388-2 PDF), and ISO followed these standards.
The tear usually occurs in the process of using military uniforms, sails, tents, umbrellas, hammocks, and so on, and tear strength is the most remarkable ability to resist tearing during the use of fabric. The Elmendorf tear test is a common method for measuring tear strength, which is used to test various international standards according to the Elmendorf tear test formula. Elmendorf test can not only test the tear strength of the fabric but also the tear strength of some plastics and cartons.
- Prepare samples: Make corresponding samples according to test standards.
- Adjusting pressure gauge: Check whether the pressure gauge value is in the range of 0.6 ±1 MPa, otherwise, adjust the pressure relief valve to meet the requirements. Start the Elmendorf tearing tester, enter the working interface, and set the corresponding parameters.
- Zero adjustments and calibration: Adjust the Elmendorf tearing tester calibration according to the test manual, and adjust the angle, then return to the main page to start testing.
- Sample test: Select a suitable hammer to test all samples and save Elmendorf tear test results.
(For detailed steps, please refer to the Elmendorf tear test manual of random incidental)
Calculation of the test result
The calculating tool: standard tearing tester whose pointer displays data showing in the form of a percentage of the total scale, records the value of each specimen, and is accurate to 1% of the full scale on the apparatus. The test result can be calculated in accordance with equation 1.
Ft = Rs x Cs / 100
(1) Tearing force = the number of pointer scales x force value at full scale (Ibs) / 100
(1) Ft = tearing force in the cN (gravity) unit or 1 pound.
Rs = number of pointer scales;
Cs = force value at full scale in the cN (gravity) unit or 1 pound.
Heavy-duty tearing tester whose pointer displays data in force values: records the results of each specimen and is accurate to 1% of the full scale of the instrument. The test result can be calculated in accordance with equation 2.
Ft = Rs x 100
(2) tearing force (Ibs) = scale reading x 100
(2)Ft = tearing force in the cN (gravity) unit or 1 pound.
Rs = number of pointer scales in the unit of cN (gravity) or 1 pound.
Computer processing of data: When the data are processed automatically by the computer, the calculations are generally generated under the effect of the software, and the test results can be read directly from the computer and are accurate to mN （gf). In any case, computer-processed data should be verified by the fabric first whose result has been known, and the software program needs to be described in the report.
- Before using, place the hammer in place, and tighten the jam hand wheels.
- When the instrument works, keep your hands and head beyond the turning area of Handle 11; the handle should not touch any obstacles.
- When the instrument has been unused for a long time, you should swing it more times before use, and proceed with calibration operations.
- Be sure to have the swing device in a locked state when moving the instrument.
- No strong electromagnetic interference around.
- Clean the Elmendorf tear test units when the instrument is not used, and store the pendulum properly to avoid collision, friction, or corrosion.
The machines for tear strength are in hot sales now! Welcome to contact us if you want to know the Elmendorf tear tester prices and how to use the Elmendorf tear tester.
Elmendorf Tear Test Method by the standard of GB/T 3917.1-2009
Mounting the specimen:
The specimen is clamped in the fixture so that the long side of the specimen is parallel to the top edge of the fixture. Clamp the specimen in the center position. Gently place its bottom edge to the bottom of the jig and cut a (20±0.5) mm cut on the opposite side of the groove with a knife (or shear tool), with the remaining tear length of (43±0.5) mm.
Press the pendulum stop button and release the pendulum. Hold the pendulum when it swings back so as not to destroy the position of the pointer and read out the tearing strength in Newton from the measuring device scale index or digital display.
As different manufacturers may not have the corresponding coefficient in Newton, so the test data needs to be converted into Newton as the unit to display the results after the test results are completed, and the test results should fall within 15% to 85% of the scale used. Repeat the test at least 5 times in each direction
Observe whether the tearing proceeds in the direction of the force and whether the yarn slips from the fabric rather than being torn. A test that meets the following conditions is a valid test.
a) The yarn has not slipped from the fabric;
b) The specimen does not slip out of the fixture;
c) the tear is complete and the tear is always within a 15mm wide groove
Test results that do not meet the above conditions should be rejected.
This method is not applicable if three or more of the five specimens are rejected.
If the agreement requires additional specimens, it is best to double the number of specimens and also to agree on how the test results are to be reported.
The impact pendulum method directly measures the test results and usually expresses the tear resistance of the fabric in Newton by the force value. The results in other units should be converted to Newtons.
Calculate the arithmetic mean of the tearing strength in Newtons for each test direction, retaining two valid digits.
If required, calculate the coefficient of variation (accurate to 0.1%) and 95% confidence interval, retaining two significant digits, in Newtons.
If required, record the maximum and minimum tearing strength of the specimen in each direction.
1. Ambient temperature and humidity will affect the test results.
2. The choice of weight range is also important.
3. Each test needs to be zeroed and calibrated beforehand.
4. Each time after the replacement of weights also need to do zero calibration.
Currently, there are mechanical pendulum tear strength testers, digital pendulum tear strength testers,s and pneumatic pendulum tear strength testers in the market, the main principle is the same, the main difference is the way to hold the sample and the way to read the value is different.
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A: Yes, please contact our sales person.
Q: What is elmendorf tear definition?
A: Elmendorf Tear ASTM D1922. Propagation Tear Resistance of Plastic Film and Thin Sheeting by Pendulum Method (Elmendorf Tear) ASTM D1922. Scope: A pendulum impact tester is used to measure the force required to propagate an existing slit a fixed distance to the edge of the test sample.
Q: How are elmendorf tear test results?
A: You can refer to the Elmendorf Standard Test for the specified.
Q: How to use elmendorf tear tester？
A: There are some steps you can follow in the “Description”. What’s more, there is a detailed procedure of the usage of elemndorf tear tester in our product manual. We can offer the e-manual if you need. Please contact us via e-mail.
Q: Can you provide the Elmendorf tear test formula for me?
A: Actually, there are different formulas of different national testing standards, and you don’t need the formula because our product will calculate the results for you automatically.