Method and device for starch application
AssigneeVoith Patent GmbH
InventorsCHRISTOPH HENNINGER, MICHAEL DOERMANN
Life of this patent
Estimating the term…
Abstract
A method and a device for the application of starch on a moving fiber web, especially on a packaging paper web such as a testliner or a corrugated medium web, include first applying starch to a first roll and/or a second roll and passing the fiber web through a treatment nip formed by the first roll and the second roll. At least one of the first or the second roll, preferably both rolls, have a hardness of 15 P&J (Pusey & Jones) or lower, preferably 5 P&J or lower and most preferably 1 P&J or lower. The starch is applied to the first roll and/or the second roll by a slot die and/or a slide die and then transferred to the fiber web in the treatment nip.
Claims20
1-14. (canceled)
A method for the application of starch on a moving fiber web, a packaging paper web or testliner or a corrugated medium web, the method comprising:
- providing a first roll and a second roll having a hardness of 15 P&J (Pusey & Jones) or lower;
- initially applying starch with at least one of a solid content between 6% and 25% or a viscosity between 5 mPas and 60 mPas to at least one of the first roll or the second roll by using at least one of a slot die or a slide die applying the starch to at least one of the first roll or the second roll as a free-falling curtain;
- and
- then transferring the starch to the fiber web passing through a treatment nip formed by the first roll and the second roll.
A device for the application of starch on a moving fiber web, the device comprising:
- a first roll and a second roll positioned to form a treatment nip for the fiber web, said first roll and said second roll having a hardness of 15 P&J (Pusey & Jones) or lower;
- and
- an applicator for applying starch on at least one of said rolls, said applicator including at least one of a slot die or a slide die forming a free-falling curtain of starch with at least one of a solid content between 6% and 25% or a viscosity between 5 mPas and 60 mPas.
Dependencies are inferred from the claim text.