US 12,378,445 B2
Direct coating and drying patterned adhesive on direct thermal face
Markku Havonen, Wrocław (PL); Marko Tiainen, Jyväskylä (FI); and Katarzyna Wojtuś, Wrocław (PL)
Assigned to UPM RAFLATAC OY, Tampere (FI)
Appl. No. 17/928,310
Filed by UPM Raflatac Oy, Tampere (FI)
PCT Filed Jun. 17, 2020, PCT No. PCT/FI2020/050437
§ 371(c)(1), (2) Date Nov. 29, 2022,
PCT Pub. No. WO2021/255324, PCT Pub. Date Dec. 23, 2021.
Prior Publication US 2023/0203348 A1, Jun. 29, 2023
Int. Cl. C09J 7/38 (2018.01)
CPC C09J 7/38 (2018.01) [C09J 2203/334 (2013.01); C09J 2301/204 (2020.08); C09J 2301/312 (2020.08)] 12 Claims
OG exemplary drawing
 
1. A method for manufacturing a linerless label web (100, 200, 500) comprising a direct thermal printable coating and a patterned pressure sensitive adhesive (120), wherein the method comprises
arranging a substrate comprising the direct thermal printable coating as a face stock (110, 510, 610, 710),
applying water-based adhesive coating (520a, 620a, 720a) onto the face stock (110, 510, 610, 710), providing the face stock (110, 510, 610, 710) with alternating adhesion areas and adhesion-free areas in a transversal direction of the face stock,
ensuring the adhesion-free areas with a pre-determined level of moisture, and
thermally drying the water-based adhesive coating (520a, 620a, 720a) into the pressure sensitive adhesive (120).