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National Standards

DIN 53121

Introducing DIN 53121 - Industrial Physics  

DIN 53121 is a global DIN international standard for testing the bending stiffness of paper and board using the beam method with a bending resistance tester. 

Bending stiffness is one of the most important characteristics of cartonboard. It influences the runnability properties and strength of the cartonboard from the printing press to the packaging line. 

The DIN 53121 approach to bending stiffness testing

The DIN 53121 testing approach uses the beam testing method which defines bending stiffness as the resistance against bending in the elastic area of the cartonboard. It uses a 4-point flexure test to bend a test strip to a specified angle.  

The 4-point flexure test delivers reliable stiffness values in the machine and transverse directions. This is useful for mini-flute corrugated boards, where bending stiffness plays a greater role than with standard flute heights. 

The DIN 53121 testing equipment

So, how can Industrial Physics improve your DIN 53121 testing?  

Messmer Büchel – Bending Resistance Tester 79-56 

When you need to work out the bending stiffness resistance of paper, paperboard, plastic film, medical tubing, and wire, you’ll find our 79-56 bending resistance test machine will flex to your requirements.   

Developed by Messmer Büchel, our specialist physical properties inspection company, our bending resistance tester is ideal for paper, paperboard, plastic film, medical tubing and wire testing. 

Need DIN 53121 testing solutions? Get in touch

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

We like to share our knowledge and we’re here to help you to answer your questions about bending resistance testing. Across the knowledgebase section of our website we publish lots of blogs on related subjects.   

Why not visit our blog on the modulus of elasticity testing or this piece on flexible packaging equipment and methods? 

If you have any questions about DIN 53121 and how we can help you with your bending resistance testing, then please just get in touch!

Contact us - Industrial Physics 

Your global test and inspection partner for DIN 53121