Method for drying a web of cigarette paper and cigarette paper obtained thereby

Method for drying a web of cigarette paper and cigarette paper obtained thereby

  • CN 105,200,840 B
  • Filed: 06/15/2015
  • Issued: 07/03/2020
  • Est. Priority Date: 06/18/2014
  • Status: Active Grant
First Claim
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1. Production line for cigarette paper making machineA method of drying a web (1) of cigarette paper in a drying section (2), the drying section (2) comprising a pre-drying section (4) at an outlet from a press section and at an inlet to a size press (3), and a post-drying section (5) between an outlet from the size press (3) and an inlet to a winding section, the drying section (2) having a plurality of drying cylinders (6), a plurality of transfer rolls (7), and at least one drying blanket (8), characterized in that the method comprises:

  • -continuously supporting, at least for said pre-drying section (4), the web (1) of cigarette paper by means of at least one drying blanket (8) travelling around all said drying cylinders (6) and all said conveying rollers (7) located in said pre-drying section, to form a single "serpentine" drying system in said pre-drying section (4) to drive the web (1) of cigarette paper at a substantially constant speed with a speed variation of less than or equal to 0.1%, thereby obtaining a value of elongation at break not less than 2.0% and a TEA index not less than 2.0kn.m/m2Having associated sets of drying cylinders (6) for supporting the web (1) of cigarette paper in a continuous manner, each set having at least one drying cylinder (6), at least one transport roller (7) and only one drying blanket (8) which continuously supports the web (1) of cigarette paper, the drying blanket (8) being in the form of an endless belt constituting a blanket loop and being mounted in such a way that all drying cylinders (6) in each set are located outside the loop of the drying blanket and all transport rollers (7) in each set are located inside the loop of the drying blanket, andthe method further comprises the following steps;

    symmetrical drying of the web (1) of cigarette paper is obtained by alternating contact with the bottom and top surfaces of the web (1) of cigarette paper in the pre-drying section (4) and/or the post-drying section (5).

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