Lexicon
Razor Blade Slitting
In razor blade slitting, the web is cut longitudinally with an industrial razor blade in order to be converted into finished widths.
Razor blade slitting is suitable for rigid films and paper with a material thickness of up to approx. 0.2 to 0.3 mm, and for soft films up to approx. 0.4 mm.
The cut can be made freely in the running web (razor-in-air), in which case the web should be supported by idler rollers as close as possible before and after the cutting position in order to prevent the material from deflecting during cutting. Alternatively, the cut is made in a grooved roller (razor-in-groove) located beneath the web in order to support it. For continuously running machines, double or multi-blade holders can be used to avoid a production stop for changing worn blades.
The cut can be made freely in the running web (razor-in-air), in which case the web should be supported by idler rollers as close as possible before and after the cutting position in order to prevent the material from deflecting during cutting. Alternatively, the cut is made in a grooved roller (razor-in-groove) located beneath the web in order to support it. For continuously running machines, double or multi-blade holders can be used to avoid a production stop for changing worn blades.
Double Blade Holder
(cut between two rollers)
(cut between two rollers)
Single Blade Holder
(cut in grooved roller)
(cut in grooved roller)