HydroBurst Bursting Strength Tester
The HydroBurst Bursting Strength Tester utilizes hydraulic bursting (diaphragm method) to determine the bursting strength and expansion of knitted fabric, woven fabric, non-woven fabric, laminated fabric, elastic woven fabric, paper, and other materials when subjected to stress in both warp and weft directions, as well as in all other directions, to get the material’s resistance to bursting.
A Bursting Strength Machine is widely used by industries and institutions for fabric or paper bursting tests.TESTEX is a professional Bursting Strength Tester manufacturer. We provide you with not only hydraulic bursting strength testers but also pneumatic bursting strength testers. Our Bursting Strength Machine complies with many bursting strength test standards, such as GB∕T7742.1-2005, ISO13938-1-2019, ASTM D3786/D3786M-18, etc.
Features of HydroBurst Bursting Strength Tester
It can be connected to a mobile phone, allowing remote control and monitoring of the testing status.
The test results can be obtained directly and printed, and equipment warning reminders can be received. Additionally, it achieves one-click sharing of the testing status.
Smooth operation, precise and durable
The hydraulic system adopts full servo control and precise screw drive, providing smooth operation, precise and durable transmission, and low noise.
The pressure measurement part is equipped with a high-precision pressure sensor, with an accuracy of up to 0.2, which means the deviation is 0.2% of the maximum range.
Longer service life of sensors
equipped with Panasonic laser displacement sensors which have no rod and are easy to replace testing cups,
thus providing sensors with better protection and reducing the risk of damage compared to traditional rod-type sensors.
Automatic testing improves efficiency.
During the testing process, the protective cover automatically descends, and then the testing cup is pressed for testing. When the test is completed, the testing cup automatically lifts, and the protective cover automatically ascends.
The testing process is automated, without manual operation, which improves work efficiency and reduces operation risks.
A smart identification system for testing cups
When changing the testing cup, the system can automatically identify the current testing cup model and switch the testing parameters automatically, which also greatly improves work efficiency.
Specifications of HydroBurst Bursting Strength Tester
Testing mode: fixed-speed bursting, fixed-pressure bursting, fixed-expansion bursting,
and fixed-time bursting.
Measurement range: 0-10 MPa ±1%.
Testing rate: 50-500 ml/min.
Hydraulic medium: glycerin.
Testing cup size:
7.310 cm² (diameter: 30.5 mm ±0.2 mm),
10 cm² (diameter: 35.7 mm ±0.2 mm),
50 cm² (diameter: 79.8 mm ±0.2 mm),
100 cm² (diameter: 112.8 mm ±0.2 mm).
Maximum expansion height: 70 mm ±1 mm.
Operating environment: temperature: 20°C ±5°C, humidity: 50~70%.
Installation conditions: air supply pressure of 6~8 bar
(Ensure that the air is clean and dry).
Power 230V 50/60Hz 5A
Dimension 500*830*660mm （L*W*H）
Application of Bursting Strength Tester
Bursting Strength Tester is applicable for truck covers, tarpaulins, trampoline fabrics, swimming pool covers, compactor curtains, agricultural bagging applications, etc. We should test the above textiles using a burst tester to ensure that the burst strength meets the specified requirements.
The Digital Bursting Strength Tester TF142 provides a digital readout of pressure with a peak hold facility and renewable rubber diaphragms. In addition, an automatic clamping device with a clear acrylic bell and an LED lamp is equipped for easy observation. It is easy for users to burst the strength of the fabric and the bursting strength of paper.
Interchangeable test bells and clamping ring sets 7.3c㎡ (Φ30.5mm/l.22inch), 10c㎡ (Φ35.7mm), 50c㎡ (Φ79.8mm), 100c㎡ (Φ112.8mm).
Testing Principle of Bursting Strength Tester
The specimen is fixed on a deformable film and then the film is hydraulically squeezed until the fabric is swollen. The difference between the total pressure required to expand the sample and the pressure required to squeeze the film is the fabric expansion strength. Using our fabric bursting strength tester can do a bursting test of fabric.
Significance of the bursting strength test of fabric
Tensile strength testing is less applicable to certain fabrics (e.g. knitted fabrics and lace) when bursting strength testing is possible. When a fabric breaks it is often subjected to pressure in the warp, weft, and diagonal directions at the same time. Some knitted fabrics, such as weft knitted fabrics, stretch in a straight line and shrink in a transverse direction, with the straight and transverse directions interacting with each other. In the case of tensile strength testing, it needs to test the warp, weft, and diagonal directions separately, whereas the bursting strength allows for a one-off evaluation of the fabric strength.
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Terminology and definitions
Test area: refers to the area of the specimen in the ring gripper.
Bursting pressure or named pressure at burst: the maximum pressure applied to the specimen held together with the lower gasket diaphragm until the specimen bursts.
Bursting strength, also called strength at burst: the pressure obtained by subtracting the diaphragm pressure from the average bursting pressure.
Diaphragm pressure: the pressure applied to a diaphragm to achieve the average bursting expansion of a specimen in the absence of a specimen.
Bursting distension also named distension at burst: the degree of expansion of the specimen under the bursting pressure, shown in the form of the bursting height or bursting volume.
Height at burst: the distance between the upper surface of the specimen before expansion and the top of the specimen at the bursting pressure.
volume at burst: the required liquid volume when it reaches the bursting pressure.
time to burst: the time when the fabric sample expands to burst out
The specimen is clamped on the extendable diaphragm under which liquid pressure is applied so as to expand the diaphragm and the specimen. The volume of liquid will be increased at a constant rate until the specimen ruptures, and the bursting strength and bursting expansion can be measured.
The sample should be taken in accordance with the standard of products or the relevant agreement. Folds, creases, fabric edges, or areas that are not representative of the fabric are not allowed to appear on the surface of the sample. The test can be carried out by working the clamping system without the requirement of cutting the sample generally.
Before the test, the sample should undergo conditioning in a relaxed state in accordance with related standards. During the test, keep the specimen in the specified conditioning and the atmosphere needed for the test.
Note 1: The test area should be 50c㎡ for most fabrics, especially knitted fabrics. However, the test area should be at least 100c㎡ for the fabric with low elongation based on the experience and pre-testing, such as the industrial fabrics.
Note 2: The comparative experiment should be carried out at the same increasing rate of the test area and the volume.
Set a constant volume growth rate at between 100 cm3/min and 500 cm㎡3/mimin. Or conduct a pre-test and adjust the bursting time of the test to 20s±5s.
Place the specimen on the diaphragm in a flat and tension-free state to avoid deformation in its plane. Clamp the specimen with the clamping ring to avoid damage and prevent it from slipping during the test. Adjust the dilatancy recording device to zero and tighten the safety cover according to the requirements of the instrument. Apply pressure to the specimen until it is destroyed.
Immediately reset the instrument after the destruction of the specimen, and then record the bursting pressure, bursting height or bursting volume. If the damaged area of the specimen is close to the edge of the clamping ring, the fact should be recorded.
Next repeat the test on different parts of the fabric. At least 5 test samples should be taken. If the buyer and seller make a consensus, the test sample can be increased.
Determination of Diaphragm Pressure
The diaphragm keeps expanding until it reaches the average bursting height or volume under the above-mentioned experimental condition.
In the wetting test, specimens should be impregnated in the water at third level with a temperature of 18 or 22℃. Take the specimen from the liquid and use the absorbent paper to absorb excess water.
In a test report, it is a must to display the general content and test result.
a) The number
b) Description of the specimen and sampling procedure (if required);
c) Model number of the expander.
d) Test area.
e) The rate of volume growth or swelling and breaking time.
f) The number of specimens, the damaged gripper, and discarded tests
g) The observation of swelling performance (e.g., one or two yarn directional damage)
h) The state of the specimen (conditioning or wet state)
i) Any deviation of the data.
a) Average swelling strength
b) Average swelling height.
c) Average swelling volume (if required).
d) Related coefficient of variation CV values (if in need);
e) Associated confidence intervals (if needed).