TMI 79-25 Bending Resistance Tester

Product Ref: TMI 79-25

The Bending Resistance Tester Model 79-25 is a user-friendly microprocessor controlled instrument to determine the bending resistance of paper, paperboard, plastic film, medical tubing, and wire.


Model 79-25 is a user-friendly microprocessor controlled instrument to determine the bending resistance of paper, paperboard, plastic film, medical tubing, and wire. Bending stiffness is a characteristic associated with the rigidity of a material. This property is related to the modulus of elasticity of the material's stiffness. Our Bending Tester was originally developed to produce a more concise, consistent measurement for the paper industry. This property is now used in a variety of industries including personal products, paper, flexible films, packaging and non-wovens.

From Messmer Büchel BV, a TMI Group of Companies brand.


Corrugated Testing, Film and Foil Testing, Medical Product Testing, Package Testing, Paper and Tissue Testing, Plastic Testing, Rubber and Foam Testing, Textile and Non-Wovens Testing


Corrugated and Board, Flexible Packaging and Films, Nonwoven and Textiles, Other, Packaging, Paper and Pulp, Plastics and Resins


Bending / Folding / Stiffness


AS/NZ 1301-4535, BS 3748, DIN 53121, ISO 2493, SCAN P29, TAPPI T 556

TMI Bending Resistance Tester & Optional GraphMaster™ Software

Our two-point method secures the specimen into a pneumatic clamp and bends the sample up to 90° against a force transducer.

What makes our Bending Resistance instrument so unique is its versatility and accuracy. Bending forces are measured at selectable bending angles from 5.0 to 90°. The instrument is available with a 100 or 1000 gram precision load cell. The advanced data acquisition system senses forces down to 0.5g. Materials can range from 5 to 50mm in length, up to 2.5mm thick.


  • Very flexible for performing different types of tests and for different standards.
  • Pre-certified weights and sample cutter options
  • Ability to add special formulas to meet unique bending stiffness requirements
  • Competitive advantages for accuracy and usability
  • Motorized testing and pneumatic clamping eliminates operator influence


  • Choice of 10N or 1000mN load cell
  • Min. force sensitivity: 0.5mN with 1000mN load cell
  • Selectable bending angle 5.0-90° and test length 5-50mm
  • Meets ISO 2493, AS/NZ 1301-4535, BS 3748, DIN 53121, SCAN P29, TAPPI T556
  • RS232 serial data output, printer output and analog signal output
  • Can be directly calibrated to traceable National standards


  • Direct sample to load cell contact for accurate measurement
  • Easy selection of test parameters from a comprehensive range through a setup menu
  • Motorized test length setting
  • Pneumatic clamps with fast release provide consistent clamping pressures for fast, repeatable results
  • Large, clear display showing peak value and angle
  • Load cells are fitted with overload protection
  • Direct data output via RS-232 to printer or optional GraphMasterTM analysis software
  • Calculates Taber Stiffness, Youngs Modulus, Gurley Stiffness units.
  • Can be directly calibrated to traceable national standards

Instrument Size

  Depth:   330 mm (13 in.)
  Height:   180 mm (7 in.)
  Width:   330 mm (13 in.)
  Weight   15 kg (33 lb)


  Electrical:   Specify voltage requirements when ordering
  Air:   (instrument quality) 400-600 kPa700 kPa (90 psi) max. supply pressure

Included Accessories

  • Clear plastic table for dead weight calibration

Optional Accessories

  • Certified dead weight set to meet ISO requirements
  • Sample Cutter
  • Printer

Ordering Information

  Load cell   Catalog Number
  10 N   79-25
  1,000 mN   79-25 (specify 1,000 mN)