Difference Bursting Strength and Edge Crush Test of Corrugated Sheets
In the packaging industry, there are many different factors that affect the quality of the products. The quality of packaging materials is a vital factor that can affect the quality and safety of the products inside the packaging. Use of corrugated boxes is a common practice in the packaging industries. The manufacturers of the corrugated boxes must ensure the best performance and strength of the boxes to ensure the safety of the products when they are being transported. There are several different testing procedures that are used for testing the quality of the products packaging cartons and containers but bursting strength test and edge crush test are two different testing procedures that are used for evaluating the strength and performance of corrugated boxes.
The bursting strength test or Mullen test is mainly used for testing the rupture or damage resistance of the corrugated fibre sheets. The instrument that is used for conducting Mullen test is called bursting strength tester. The instrument exerts a rupture force to test the minimum amount of force required for causing a rupture in the sheet. This helps in ensuring that the box made form that sheet will be able to survive the harsh impacts that are exerted on them during the use.
The edge crush test is the testing procedure that is used for testing the resistance of the packaging boxes against any crushing force. This is conducted with the help of a testing instrument called Edge Crush Tester. This instrument applied force in the perpendicular direction of the edge of the test specimen.
When it comes to the difference between both the testing procedures, one of the main differences between the two is the requirement of a minimal GSM for conducting the test. The Mullen test has higher requirement of minimum GSM for testing whereas for edge crush testing the requirement of GSM is lower. This is why the BST rated corrugated boxes are slightly heavier than ECT rated corrugated boxes.
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