Dust Bag Tensile Test Solution--Universal material testing machine + large corrugated fixture

With the continuous improvement of industrial environmental protection requirements, dust bags are the core components of dust removal equipment, and their performance quality is directly related to the dust removal effect and equipment life. Kezhun Measurement and Control believes that tensile performance is one of the key indicators for evaluating the quality of dust bags, which reflects the ability of the bags to withstand mechanical stress during long-term use.

 

Based on relevant standards, this paper uses a universal tensile testing machine to conduct tensile tests on dust bags, systematically studies their mechanical properties, and provides a scientific basis for product quality control and service life evaluation.

 

1. Test Principle

The dust bag tensile test is to measure the mechanical properties of the sample during the tensile process by applying a unidirectional tensile load to the sample. When the sample is subjected to axial tension, the internal fiber structure will produce a stress-strain response until the sample breaks. By recording the load-displacement curve during this process, the key mechanical parameters of the sample, such as breaking strength, breaking elongation, and elastic modulus, can be obtained to evaluate the mechanical strength and deformation characteristics of the dust bag.

 

2.Test standards：

This test mainly refers to the following standards:

ISO 13934-1:2013 "Textiles - Tensile properties of fabrics - Part 1: Determination of breaking strength and elongation at break (strip method)"

 

3. Test machine

a. Universal testing machine/Tensile testing machine

b. Large corrugated clamp:

The specially designed corrugated surface clamping device effectively prevents the sample from slipping and ensures that the sample does not experience stress concentration or premature fracture at the clamping point during the test.

 

c. Auxiliary tools: electronic vernier caliper (accuracy 0.01mm), sample cutter, marking pen, etc.

 

4. Test conditions

 

Sample name: dustproof cloth bag

Sample size: length 250mm × width 50mm (effective test area)

Test temperature: room temperature (23±2℃)

Relative humidity: 50±5%RH

Test type: tensile

Test speed: 10mm/min

Clamping distance: 200mm

Pre-tension: 2N

 

Test process

Step 1. Sample preparation

1. Randomly cut at least 5 samples from different parts of the dust bag to ensure that the samples are representative.

2. The sample size is 250mm long × 50mm wide, and the long side is parallel to the warp or weft of the bag.

3. Use a cutter to cut neatly along the edge of the sample to avoid burrs or damage.

4. Mark the clamping lines at both ends of the sample to ensure that the clamping position is consistent.

 

Step 2: Instrument preparation

1. Check whether all parts of the universal tensile testing machine are normal, and confirm that the sensor has been calibrated and is within the validity period.

2. Install the large corrugated clamp and adjust the distance between the upper and lower clamps to 200mm.

3. Open the test software, create a new test method, and set the parameters:

Test type: tensile

Test speed: 10mm/min

Fracture judgment: load decreases by 80%

Data acquisition frequency: 50Hz

Perform instrument zeroing operation to ensure that there is no initial load.

Step 3: test steps：

1. Place the sample vertically into the fixture so that the marking line is aligned with the edge of the fixture.

2. Tighten the fixture evenly to ensure that the sample does not slide in the clamping position and is not subject to additional damage.

3. Apply 2N pre-tension to eliminate the initial relaxation of the sample.

4. Start the test program, and the testing machine stretches the sample at a uniform speed of 10mm/min.

5. Observe the deformation and fracture process of the sample, and record whether the fracture position is within the effective test area.

6. After the sample breaks, stop the test and record the fracture strength and fracture elongation.

7. Loosen the fixture, remove the fractured sample, and check the fracture surface characteristics.

8. Repeat the above steps to complete the test of all samples.

 

Step 4： data processing

1. The software automatically calculates the maximum fracture strength (N) and fracture elongation (%) of each sample.

2. Eliminate abnormal data (test results where the fracture position is within 5mm of the clamping position).

3. Calculate the average breaking strength, standard deviation and coefficient of variation of warp and weft specimens.

4. Analyze the characteristics of the load-displacement curve and evaluate the elasticity, plasticity and toughness of the material.

 

Notes：

When preparing the sample, avoid direct contact with the test area with your hands to prevent contamination or damage.

When clamping the sample, the force should be moderate. Too tight may cause premature damage to the sample, and too loose may cause the sample to slip.

The test environment should be kept stable to avoid temperature and humidity fluctuations affecting the test results.

Regularly calibrate the test machine sensor and displacement measurement system to ensure data accuracy.

Dust bags of different batches or materials should be tested separately and should not be mixed.