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ASTM D3786-80a-Standard Testing Instruments
ASTM D 3786 80a is an extensive testing standard that is used for determining the bursting strength of textile products such as fiber, fabrics etc. In this method, the resistance of textile products against bursting is measured by a hydraulic or pneumatic diaphragm bursting tester. This testing standard and methods is applicable to a variety of textile products such as knitted fabrics, woven fabrics etc.
The test sample is clamped between two clamps and force is exerted on the sample using a diaphragm operated hydraulically and pneumatically. The load is increased until the sample ruptures. The test is also called a Mullen’s Bursting tester.
The hydraulic diaphragm method for the measurement of the bursting strength of knitted, woven, and nonwoven textile fabrics is used by ASTM D3786. A round-shaped test piece is placed over a rubber diaphragm, and a hydraulic pressure is applied at a controlled rate until rupture takes place. The pressure recorded at rupture represents the bursting strength. Presto Stantest's bursting strength testers deliver the precise hydraulic pressure control and diaphragm geometry ASTM D3786-compliant testing requires.
Significance
ASTM D3786 is significant because its multiaxial loading geometry reflects the omnidirectional stresses fabrics encounter in real end-use conditions. It provides a better approximation of the performance of fabrics under practical service stresses as they would be encountered in the areas of seating, filtration, geotextiles, and apparel applications compared to the strip tensile tests. Bursting strength data is useful for a fabric manufacturer to assess the fabric's durability, select materials, and ensure the quality of the fabric during manufacturing.
Scope
ASTM D3786 is applicable to knitted, woven, and nonwoven textile fabrics subjected to the hydraulic diaphragm method of testing for bursting strength. It covers specimen geometry, diaphragm specifications, rate of the application of hydraulic pressure, and measure of the pressure to break the diaphragm so as to obtain the same and reproducible results. The standard supports quality control and material qualification programs across textile, filtration, geotextile, and apparel manufacturing industries.
Burst Genie 4.0 Digital
The force required for bursting or complete rupture of the board is measured through a Digital Indicator. The bursting strength defines the material's quality as compared to the others. Bursting Strength Tester Genie 4.0 provides a hydraulic pressure on the sample. In the Presto Bursting Strength Tester, a hydraulic pressure is applied on the sample under test, using a neoprene diaphragm, on a circular area. So, a circular piece of the sample of the corrugated board is used for the test. Widely used in the paper and packaging industries, this Digital Bursting Strength Tester conforms to major global testing standards including ASTM D3786-01, ASTM D3786-80a, IS 1060 Part-1 1987, ASTM D774, ISO 2758, and ISO 2759. Compliance with these standards makes it a reliable choice for manufacturers who need precise quality control and international acceptance of their test results. Its dual test modes for paper and board, along with automatic calculation of bursting factor and pass/fail criteria, make it one of the most advanced solutions for packaging material testing.
