Elmendorf Tear Tester | A smart instrument developed by the sister company ChiuVention.
The Elmendorf Tear Tester is also called the Pendulum Tear Tester. It is for testing tearing resistance. This is used for conducting fabric tear strength tests. It tests how hard the fabric is to tear. It does this using the pendulum tearing method. The pendulum falls from a certain height. It turns all its potential energy into kinetic energy and cuts the fabric. Then, it measures the force needed for the fabric to tear to a certain length. This force shows how hard the fabric is to tear.
The innovative balance pendulum plate design achieves a higher accuracy for tear testing. The pendulum arm of the ElmenGuide Elmendorf Tear Tester is specially designed. Its center of gravity lines up with the rotation center. This happens when no weights are attached. This results in higher accuracy and reliability of the tear resistance test equipment.
The Elmendorf Tearing Tester complies with ASTM D1424, BS ISO 13937-1, and GB/T 3917.1, and ISO 4674-2. TESTEX also provides other types of Elmendorf Tear Strength Tester.
Description
The innovative design uses a balanced pendulum plate. It achieves a higher level of tear testing accuracy.
The pendulum arm of the ElmenGuide Elmendorf Tear Tester is specially designed. The center of gravity of the entire arm lines up with the rotation center when no weights are attached. This brings higher accuracy and reliability of the tear resistance test equipment.
Smart instrument
You can connect the Elmendorf Tear Tester to a smartphone. This allows you to remotely control and monitor tests. You can get the tear resistance test results directly and print them. You can also get equipment warning reminders. Additionally, it achieves one-click sharing of the testing status.
Automatic recognition of weights.
The Tearing Resistance Tester can recognize the weight attached. It adjusts to the right range.
Humanized design is for more safety.
The Elmendorf Tearing Tester has a double-button switch design. It prevents accidents and is easier for testing operators to use.
Precise manufacturing and stable operation.
This Elmendorf Tear Tester’s fixture rotates. It loses very few empty pendulums.
Many measurement units (N, cN, gf, lbf) to choose from.
Also, the ElmenGuide Tearing Resistance Tester has a precise appearance design. It has an aluminum alloy hard-oxidized surface. The surface is sleek, durable, and easy to clean. The trapezoidal chassis is more stable. The seven-inch color touchscreen is simple and easy to use.
Specifications of ElmenGuide Elmendorf Tear Tester
Load Range: 8N, 16N, 32N, 64N, 128N
Testing accuracy: ≤±0.2%F·S
Tear length: 43mm
Automatic incision length: 20±0.2mm
Sample size: 100×75mm
Standard Accessories
Fuse: 2 pcs
Sample cutter: 1 pc, 100mm*75mm
Test weight A: 1 pc, 8N
Test weight B: 1 pc, 16N
Test weight C: 1 pc, 32N
Test weight D: 1 pc, 64N
Test weight E: 2pcs, 128N
Calibration weight a: 1 pc, 8C
Calibration weight b: 1pc, 16C
Calibration weight c: 1pc, 32C
Calibration weight d: 1 pc, 64C
Calibration weight e: 1 pc, 128C
Standard
ASTM D1424, BS ISO 13937-1, GB/T 3917.1， ISO 4674-2
Weight
| 70kg |
Power
| 220/110 V | 50/60 Hz |
Dimensions
| Length: 580 mm | Width: 420 mm | Height: 600 mm |
Principle of Elmendorf Tear Tester
The weight is lifted to a certain height, giving it potential energy. The dynamic and fixed grippers align, clamp the specimen, and the cutter cuts a mouth in its middle. The hammer is swinging down freely. The dynamic and fixed grippers separate fast. The specimen is torn by the energy stored in the pendulum itself. The control system gets the remaining potential energy of the pendulum after the specimen is torn. It calculates the energy used to tear the specimen to find the force needed to tear it.
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More about Elmendorf Tear Tests
After wearing, friction thins the yarn. Then, the force breaks the yarn, forming a crack. Fabric tears when a concentrated load acts on it. This tearing is a phenomenon. The fabric’s tearing strength, or Elmendorf tear strength, is important. It is an indicator of the textile. The instrument used to find this index is a fabric-tearing 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. All textile makers need a fabric tearing tester. So do textile testers. It has a simple structure and is easy to use. It has stable test data and many other advantages. Because of this, many industries, such as textile, paper, and packaging, are using it a lot. The difference is that each industry has a different standard of sample making.
The Elmendorf tear tester has related nicknames. They include the Elmendorf tear-resistant tester. They also include the Elmendorf tearing strength tester. They also include the Elmendorf tear strength tester.
You can also get more knowledge about other fabric tearing strength tests.
We also provide fabric tensile tester.
14 reviews for Elmendorf Tear Tester | A smart instrument developed by the sister company ChiuVention.
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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.
Test Procedure
- 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.
Notice
- 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.
Operation steps:
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.
Calculated results:
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.
Test Notes:
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.
[contact-form-7 id="16355" title="Inquiry"]
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.
Q: What is the testing capacity for this ElmenGuide Elmendorf Tear Tester?
A: The Load Range of this ElemnGuide is 8N, 16N, 32N, 64N, 128N.
Q: What standards does the Elmendorf Tear Tester comply with?
A: ASTM D1424, BS ISO 13937-1, GB/T 3917.1, ISO 4674-2.
Q: What are the sample preparation requirements for Elmendorf test?
A: Sample Size: Cut samples into a rectangular shape, usually 100 mm x 50 mm, though dimensions can vary based on specific testing standards.
Thickness: Ensure the sample thickness is consistent and within the tester's capacity.
Edge Preparation: Create a small, consistent notch (usually around 20 mm) on one edge of the sample to initiate the tear.
Notes:
Cut 5 pieces of each specimen in the warp direction, and the short side should be parallel to the warp direction;
When mounting the specimen, make the long side of the specimen parallel to the top edge of the fixture, gently place it to the bottom of the fixture, and cut it from the groove on the opposite side;
Repeat the test at least 5 times in each direction and the result shall fall within 15% to 85% of the scale used.
Q: What factors influence tear strength for Elmendorf test?
A: Material Type:
The tearing strength of fabrics of different materials is different, generally speaking, nylon>polyester>hemp>cotton>human cotton.
Fabric Density:
Increase the fabric density can improve the tearing strength, but not the higher the density of the tearing strength is better. For example, the same cotton 40Sx40S cotton poplin, 13372 weft tear is usually better than 133100, because 133100 is too tight, the organisational structure prevents more weft yarns to the tear triangle slip gathering.
Friction and binding between yarns:
Reducing friction and binding between yarns allows more yarns to slide together and be stressed, resulting in higher tear strength. For the same yarn density, the tearing strength of satin > twill > plain. In order to make the yarn friction less, softeners with slippery properties such as silicone oil can be added during finishing and sizing.
Fibre moisture content:
Cotton and linen fibre wet strength is higher than dry strength, so increasing its moisture absorption properties (e.g. soaking rolled urea and other moisture absorbers) before testing helps to improve its strength data.
Fibre breakage mechanism:
The breakage of human cotton fibres is mainly caused by chain segment slippage. Resin cross-linking reduces the strength of cotton and linen fabrics, but enhances the strength of human cotton. Therefore, improving the strength of human cotton fabrics can be done by cross-linking them with resin.
Q: How can we interpret Elmendorf tearing strength test results?
A: The Elmendorf tearing strength test results are interpreted by analyzing the numerical tear strength value, comparing it to industry standards for the material, considering the direction of the tear, assessing variability among multiple samples, and relating the results to the material's intended application.
Q: How to choose the weight range for the Elmendorf tear test?
A: When choosing the weight for different types of fabrics in an Elmendorf tear test, select a weight that ensures the tear force reading falls within the mid-range of your testing machine's capacity, typically between 20% and 80% of the scale; for lighter fabrics, use a lower weight pendulum, and for heavier fabrics, use a heavier weight pendulum to get accurate results within the testing range.
Q: How to determine the tear direction when conducting Elmendorf tear strength test?
A: Understand Fabric Orientation: Identify the machine direction (MD) and cross direction (CD) of the fabric. The MD is the direction in which the fabric is produced, while the CD is perpendicular to the MD.
Evaluate Material Properties: Consider how the fabric's weave, knit, or fiber orientation may affect tear strength. Some fabrics may have directional properties that influence tear resistance.
Prepare Samples Accordingly: Cut samples in both directions—MD and CD. This allows for a comprehensive assessment of the fabric's performance in different orientations.
Mark Tear Direction: Clearly mark the tear direction on each sample before testing, indicating which edge will be notched for the test.
Conduct Tests: Perform the tear strength test separately for each sample direction, ensuring that the testing conditions are consistent.
Analyze Results: Compare the tear strength values obtained from both directions to understand the fabric's performance characteristics and any directional dependencies.
By following these steps, you can accurately determine the tear direction.
Kate –
Very easy to use, with immediate tear strength results.
Jane –
Automatic specimen clamping for stability testing. Working good!
Benjamin H –
All of this elmendorf Tear tester is good, but I wish the interface could be better designed, but just works well with the testing:D
James Smith –
My customer needed a tearing strength testing, I got full support from TESTEX, highly recommend.
Jonas Lowell –
Goods Received. Feels like professional quality. MUCH better than what we’ve been using for the past year that we paid more for
Isabel Steinbeck –
Very nice.So easy to setup.
Yves Church –
Very satisfied with this Elmendorf Tear Tester price and performance.
Phil Dalton –
The operation of this tester is simple and convenient,pretty good!
Burton Copperfield –
Very useful machine! Recommend!!
Willie Dupont –
The elmendorf tear test unit is excellent for its performance.
Pamela Eveline –
Everything is good, but some problems appear in communication. The manufacturer of elmendorf tearing tester still strive to solve for me.
testextextile –
We feel so sorry for this. We’ll continue to struggle for providing best service for customers.
Arshad –
sir, i like your equipment because it is so frinedly use, but i need some guidance about Elmendrof tear tester TF140B. can you please do me a favor. i want to know how to calibrate this version of tear tester?? i hope you will guide me..
testextextile –
Mr Arshad,our colleague will contact you by email as soon as possible.
Lou Lowell –
Everything was great!
Saxon –
bom vendedor produto chegou antes do prazo eu recomendo !!!
testextextile –
Thank you for your support！！