Physical Properties & Strength TestersCrease and Board Stiffness Tester 79-15 ΤΜΙ INDUSTRIAL PHYSICS

Crease and Board Stiffness Tester 79-15 ΤΜΙ INDUSTRIAL PHYSICS, is useful to industries of corrugated, carton board, paper, printing, and packaging. The relationship between board stiffness and crease recovery (spring back) is an important factor in the performance of cartons on high-speed packaging machines and in manual-folding. It is crucial to have the creases in boards correct and uniform. The crease recovery (spring back) can result in forces, which distort the carton or cause stresses to be applied to closures, which reduce their effectiveness.

Board stiffness is determined by bending a 2 in (50mm) length of the board through a 15° angle. Crease recovery is determined by holding a formed crease at 90° and measuring the recovery force after 15 seconds. This instrument measures the bending resistance of the board and evaluates commercially formed creases.

With interchangeable jaws to test square corner packs and round corner packs. The sample is gripped in jaws and rotated through a set angle, the force transmitted through the sample is measured. To assist in the accurate cutting of sample specimens, a Crease and Board Stiffness cutter is included.

Crease and Board Stiffness Tester 79-15, comes supplied with two interchangeable (crease recovery) sample jaw assemblies. One crease recovery jaw assembly tests (90-degree fold) and the other, when fitted to the machine, tests round corner packaging materials in accordance with Philip Morris method PMI 068.