IDM Instruments has released its new crease and stiffness tester, more ergonomical and faster in test operation. In modern, high-speed, packaging machines, it is important to have the creases in boards correct and uniform.
The value of crease stiffness is technically important in the folding of carton blanks during their erection and closure, whether this is by hand or by mechanical means.
The crease recovery (spring back) can result in forces which distort the erected carton or cause stresses to be applied to closures, which reduce their effectiveness.
Crease recovery is determined by the decrease in resistance offered by creased board after it is folded at 90°at the crease, measuring the recovery force after 15 seconds.
Board stiffness can be determined by bending a 50mm length of board through a 15° angle.
The crease and stiffness tester operates on 220/240V ac, 50Hz, and has an optional RS232 output.
The tester complies with BS 6965 and BS 3748 and is useful in the cartonboard, paper and packaging industries. To assist in accurate cutting of sample specimens, a crease and stiffness cutter is also available. IDM Instruments 03 9706 7837.