Investigation of tension of flock printing materials
Mechanical characteristics of paperboard and flock printing material (fracture force, stresses and strain) at fracture have been studied. The strain resulting in the material under tension and fracture have been described. An increase the stress and decrease the strain have been determined in the machine direction, while in the cross-machine direction stress decreases and the value of strain increases. The study results of stress and strain at fracture paperboard without flock-coating and with polyamide flock have been compared. The effect of the velocity of applying the load during tension test of the paperboard and flock printing material has been determined. The experi-mental results have been described by an exponential equa-tion and correlation curves have been obtained.