{"id":1475,"date":"2026-01-28T00:06:58","date_gmt":"2026-01-28T00:06:58","guid":{"rendered":"https:\/\/www.crushtester.com\/?p=1475"},"modified":"2026-01-28T00:06:58","modified_gmt":"2026-01-28T00:06:58","slug":"corrugated-board-flat-crush-test","status":"publish","type":"post","link":"https:\/\/www.crushtester.com\/nl\/corrugated-board-flat-crush-test\/","title":{"rendered":"Introduction to the Flat Crush Test for Corrugated Board"},"content":{"rendered":"

Corrugated board<\/strong> is widely used in packaging due to its strength, versatility, and protective qualities. To ensure its effectiveness, manufacturers often perform the flat crush test<\/strong> to evaluate its durability. This test measures the resistance of corrugated board to crushing forces, which is crucial for assessing the material\u2019s ability to withstand pressure during handling, stacking, and transportation.<\/p>\n\n\n\n

De flat crush test<\/strong> specifically focuses on the collapse resistance of the fluted structure of the board, which is vital for the performance of corrugated packaging<\/strong>. In this article, we will explore the ISO 3035<\/strong> standard, the testing procedure, and the significance of the test, along with the role of the edge crush tester<\/strong> in providing reliable results.<\/p>\n\n\n\n

What is the Flat Crush Test for Corrugated Board?<\/h3>\n\n\n\n

De flat crush test<\/strong> for corrugated board<\/strong> is designed to determine the material\u2019s resistance to crushing forces applied perpendicular to its surface. The test involves subjecting a test piece of corrugated fibreboard to an increasing force until the fluting, or the wavy structure between the layers of the board, collapses. The maximum force sustained by the test piece before collapse is measured, providing valuable data on the board\u2019s compressive strength.<\/p>\n\n\n\n

This test is essential for evaluating the structural integrity<\/strong> of the board, which directly impacts the packaging\u2019s ability to protect the contents during shipping and handling. It is especially important for single-faced and single-wall corrugated boards used in packaging applications where resistance to pressure is a key requirement.<\/p>\n\n\n\n

ISO 3035: Standard for Flat Crush Testing<\/h3>\n\n\n\n

De ISO 3035<\/a><\/strong> standard outlines the procedure for performing the flat crush test<\/strong> on corrugated board<\/strong>. According to this standard, the test is conducted by applying a compression force to the test piece using two flat and parallel platens. The rate at which the platens approach each other is precisely controlled at 12.5 mm\/min \u00b1 0.25 mm\/min<\/strong>, ensuring consistency in test results.<\/p>\n\n\n\n

De ISO 3035<\/strong> standard is applicable to single-faced<\/strong> en single-wall corrugated fibreboard<\/strong>, but not to double-wall<\/strong> or microflute corrugated boards<\/strong>, as these materials do not have a clearly defined end-point during the test. For each test, at least 10 test pieces should be tested, and the maximum force sustained by the test piece before the collapse of the fluting is recorded.<\/p>\n\n\n\n

Procedure for Performing the Flat Crush Test<\/h3>\n\n\n\n

De flat crush test<\/strong> is a straightforward procedure, but precision is essential to ensure accurate results. The following steps outline the testing process:<\/p>\n\n\n\n

    \n
  1. Sample Preparation<\/strong>:\n