IDM Instruments ’ crease and stiffness tester is now more ergonomical and faster in test operation. In modern high-speed packaging machines, it is very 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 90º at the crease, measuring the recovery force after 15 seconds.
Board stiffness can be determined by bending a 50mm length of board through a 15º angle.
The crease and stiffness tester operates with 220/240V ac @ 50Hz and has an option of an RS232 output.
BS6965 and BS3748 are two standards which the crease and stiffness tester abide to, and is useful mainly to the industries of cartonboard, paper and packaging.
To assist in accurate cutting of sample specimens, a crease and stiffness cutter is also available.