US 12,291,807 B2
Manufacturing of a web of packaging material
Cristian Bodin, Lerum (SE); and Linnea Seiler, Partille (SE)
Assigned to Swedish Match North Europe AB, Stockholm (SE)
Appl. No. 17/431,585
Filed by Swedish Match North Europe AB, Stockholm (SE)
PCT Filed Feb. 17, 2020, PCT No. PCT/EP2020/054050
§ 371(c)(1), (2) Date Aug. 17, 2021,
PCT Pub. No. WO2020/169513, PCT Pub. Date Aug. 27, 2020.
Claims priority of application No. 1950206-1 (SE), filed on Feb. 19, 2019.
Prior Publication US 2022/0145502 A1, May 12, 2022
Int. Cl. D04H 1/541 (2012.01); A24F 23/02 (2006.01); B65B 9/10 (2006.01); D04H 1/542 (2012.01); D04H 1/74 (2006.01)
CPC D04H 1/5418 (2020.05) [A24F 23/02 (2013.01); B65B 9/10 (2013.01); D04H 1/5412 (2020.05); D04H 1/542 (2013.01); D04H 1/74 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An arrangement for manufacturing of a web of packaging material for an oral pouched snuff product, said web being a saliva-permeable nonwoven web comprising fibres of a first type and of a second type, said arrangement comprising:
a first fibre supply unit for supplying said fibres of said first type, said fibres of said first type being cellulose-based staple fibres, and
a second fibre supply unit for supplying said fibres of said second type, said fibres of said second type being thermoplastic fibres, which are meltable and/or softenable at least at a surface of said fibres of said second type,
a carding unit for carding said fibres of said first type and said second type to form a pre-web,
an air-through bonding unit for bonding said pre-web by means of at least partial melting and/or softening of said fibres of said second type to form a bonded web, said air-through bonding unit comprising or being constituted by a flat air-through dryer and/or a cylinder air-through dryer,
a calendering unit for surface treatment of said web by smooth calendering, wherein said calendering unit is configured to receive said web following bonding of said web by said air-through bonding unit, said calendering unit being configured to operate at a surface treatment temperature being within the range of 55° C.-70° C., wherein said calendering unit comprises a pair of rollers having smooth surfaces, wherein the calendering unit is configured to obtain a pre-selectable thickness and/or surface finish and/or air permeability of the web.