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Tearing Strength Tester

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Tearing Strength Tester


In textile industries, when a fabric is manufactured, it becomes very important to test its strength for various forces that may be applied on it. A major lab test instrument that is used in textile industry for testing the products for evaluating their tearing strength is the tearing strength tester. It helps in determining the amount of force required to tear a piece of fabric when applied by a falling pendulum.

Details

In textile industries, when a fabric is manufactured, it becomes very important to test its strength for various forces that may be applied on it. a major lab test instrument that is used in textile industry for testing the products for evaluating their tearing strength. It helps in determining the amount of force required to tear a piece of fabric when applied by a falling pendulum. This assists the manufacturers in assessing the exact strength of the fabric.

It is a lab testing equipment that evaluates the average force in grams that when applied on a fabric spreads it or tears it apart. The working principle of the apparatus is that the force applied in the perpendicular direction of the test specimen needs to be distributed to different surfaces or plies after the ripping of the sample has been started. The equipment is duly fitted with a constant radius of testing strength. The machine is fitted with a heavy pendulum that is used for exerting force on the test specimen. After the test, the loss in potential energy of the pendulum is calculated. This loss of potential energy is the work done by the pendulum to tear the test sample. This gives the force required for tearing the sample.

Significance

If a standard instrument with a scale of 0-100 is used with 1600gf, the average tearing force is calculated by the below formula.

Average tearing force= 16x average scale reading/ number of plies.

Tear Factor

Tear factor is computed by using two different test specimens for their test results.

Tear factor= Tear resistance in gmf/ substance in grams per meter square.

  • The unit used for measuring the force is “mN” which stands for Mega-Newton.
  • The falling pendulum provided with the equipment can easily cover many different angles.
  • For easy cutting of samples, there are templates provided with the machines along with a board and a cutting so that the sample is easily prepared for the test.
  • For safety purpose, start and stop functions are provided with the equipment to hold the pendulum.
  • Various test parameters that are used for best analysis include peak load, medium load, and tearing strength.
  • The tearing strength of the fabric is determined by a cut in the center of the sample. In addition to that, an opposing tail called as tongue is also clamped with the equipment. 
  • There are variable capacities of equipment available such as 1600 gmf, 3200 gmf and 6400 gmf with an optional variant of 1200 gmf capacity.
  • The surface length of each holding clamp is 35.5mm x 15.5 mm.
  • The distance between the clamps is 2.5mm ±0.25mm
  • For best assessment of tearing strength of the sample, the sample is set at a distance of 43± 0.15mm.
  • The slit is of a size of 20 mm.
  • The machine comes with a measuring scale with a range of 0 to 100%.
  • There are calibrated weights of 1600gm, 3200gm, 6400 gm provided with the equipment.

The equipment complies with various standards that are given below.

ASTM D-689, DIN 53862, D1424, M&S 29 and BS 4153

Customer Reviews

Best Instrument to Measure the Tearing Resistance Strength of Fabrics Review by Vinod
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I am thankful to Labtiger for superb quality of product. The machine permits me to calculate the tearing strength simply. It is too simple to measure and control the exact amount of force which is required to tear a piece of fabric. (Posted on 12/10/2015)
best to choose the right quality of fabric Review by Sudha
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Value
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I am working for the textile industry and I am thankful to Labtiger for such an excellent product. The machine allows me to get the tearing strength simply. It is too simple to determine the exact amount of force required to tear a piece of fabric and alerting me about the quality of the fabrics. Simply the best.
(Posted on 12/7/2015)

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Tearing Strength Tester

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