ISO 7765-1

Introducing ISO 7765-1 – Industrial Physics

ISO 7765-1 is an ISO international free-falling dart testing method that will help you to determine the energy that causes a thin plastic film or sheet to fail, using the staircase testing approach.   

The falling dart impact test is a straightforward and efficient way to test the impact strength or toughness of samples made from various substances. You can use this impact test to measure a material’s impact resistance, by dropping a free-falling dart and recording the resulting effect on your securely clamped sample.  

ISO 7765-1 free falling dart test methodology

The first part of the ISO 7765 method was designed specifically for plastic film testing of samples that are under one millimeter thick. You drop a free-falling dart from a specified height, under specified conditions, until you find the failure point of more than 50% of your samples.   

Within ISO 7765-1 there are two free-fall dart testing methods to choose from: 

• ISO 7765-1 method A: employs a dart with a 38 mm ± 1 mm diameter hemispherical head dropped from a height of 0,66 m ± 0,01 m. This method may be used for materials whose impact resistance requires masses of about 0.05KG to about 2KG to fracture them. 
• ISO 7765-1 method B: employs a dart with a 50 mm ± 1 mm diameter hemispherical head dropped from a height of 1,50 m ± 0,01 m. Its range of applicability is from about 0.3KG to about 2KG. 

The measurement technique for these free-falling dart tests is known as the staircase testing method. This means that a uniform missile mass increment is employed during testing. It’s then decreased or increased by a uniform increment, depending upon the result of the last drop. 

ISO 7765-1 testing – key definitions

To perform a successful ISO 7765-1 falling dart impact test you’ll need to understand a couple of key definitions:  

Impact failure mass: the falling-dart missile mass, estimated statistically, at which 50% of the specimens would fail. 

Missile mass: the total of the masses of the falling-dart, the incremental weights attached and the locking collar. 

ISO 7765-1 falling dart impact testing equipment

So, how can Industrial Physics improve your ISO 7765-1 falling dart impact testing?  

Ray-Ran – FD-A2 Advanced Floor Mounted Falling Dart Tester
The Ray-Ran FDA2 falling dart tester features advanced drop dart technology in an affordable machine that’s built for accuracy, safety, and ease of use. It complies with multiple international testing standards including ISO 7765-1, ISO 6603 and ASTM D4272. 

Manual Advanced Falling Dart Impact Tester
The Ray-Ran Manual Advanced Falling Dart Impact Tester provides a simpler method for determining the energy that causes thin flexible materials such as plastic film, paper and composite sheets to fail when impacted with a free-falling dart. 

Manual Basic Falling Dart Impact Tester – Ray-Ran
The Ray-Ran Bench mounted falling dart tester will help you test to several international standards, including ISO 7765-1. It is our basic model and doesn’t come with a microprocessor or LCD display. 

Need ISO 7765-1 testing solutions? Get in touch

We’ve learnt a thing or two about falling dart impact testing over the decades. Now Industrial Physics is recognized as a brand that likes to bring new, innovative impact resistance testing equipment, including falling dart testers to market. 

We like to share our knowledge and we’re here to help you to answer your questions about impact resistance testing. Across the knowledgebase section of our website we publish lots of blogs on related subjects. For example, here’s a blog that explores the various types of impact test inspection equipment.  

If you have any questions about ISO 7765-1 and how we can help you with your falling dart impact resistance testing, then please just get in touch!

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