US 12,269,237 B2
Linerless label
Marko Tiainen, Jyväskylä (FI); Magdalena Rabska, Tyniec Mały Kobierzyce (PL); and Agnieszka Morawiec, Wrocław (PL)
Assigned to UPM RAFLATAC OY, Tampere (FI)
Filed by UPM Raflatac Oy, Tampere (FI)
Filed on Sep. 27, 2021, as Appl. No. 17/485,747.
Claims priority of application No. 20198915 (EP), filed on Sep. 29, 2020.
Prior Publication US 2022/0097337 A1, Mar. 31, 2022
Int. Cl. B31D 1/02 (2006.01); B05D 5/10 (2006.01); B32B 37/06 (2006.01); C08K 5/54 (2006.01); C09J 7/38 (2018.01); C09J 7/40 (2018.01); C09J 133/06 (2006.01); C09J 133/08 (2006.01); C09J 183/04 (2006.01); G09F 3/02 (2006.01); G09F 3/10 (2006.01)
CPC B31D 1/021 (2013.01) [B05D 5/10 (2013.01); B32B 37/06 (2013.01); C08K 5/54 (2013.01); C09J 7/385 (2018.01); C09J 7/401 (2018.01); C09J 133/06 (2013.01); C09J 133/08 (2013.01); C09J 183/04 (2013.01); G09F 3/02 (2013.01); G09F 3/10 (2013.01); B32B 2307/7376 (2023.05); C09J 2203/334 (2013.01); C09J 2301/204 (2020.08); C09J 2301/302 (2020.08); C09J 2301/408 (2020.08); C09J 2433/00 (2013.01); G09F 2003/0225 (2013.01); G09F 2003/0241 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for manufacturing a direct thermal linerless label web (100), the direct thermal linerless label web (100) comprising a face (110) having a first side (111) and a second side (112), the face comprising
a direct thermal printable coating, and
optionally, a release coating (130) on the direct thermal printable coating, wherein the method comprises
supplying the face (110),
applying a modified adhesive coating (121) on to a substrate (110, 611), the modified adhesive coating comprising
a) water-based acrylic adhesive comprising 2-hydroxyethyl acrylate,
b) emulsified silicone additive, the amount of the emulsified silicone additive being in a range between 1 wt. % and 6 wt. %, calculated from the total dry weight of the adhesive coating, and
c) at least one wetting agent,
and
thermally drying the modified adhesive coating (121) on the substrate (110, 611) into a pressure sensitive adhesive coating (120),
wherein the pressure sensitive adhesive coating (120) comprising the silicone additive has a coat weight of 10 to equal to or less than 21 g/m2, calculated as total dry weight of the pressure sensitive adhesive coating (120); wherein the emulsified silicone additive is present in an amount of 0.1 g/m2 to 1.3 g/m2, and wherein the wetting agent is present in an amount of 0.3 to 5 weight percent, calculated from a total dry weight of the pressure sensitive adhesive coating (120);
wherein
i) said substrate is the face (110), and the modified adhesive coating is applied on to
the first side (111) of the face (110), or
the second side (112) of the face (110)
or
ii) said substrate (110, 611) is a carrier material (611, 611a, 611b), and the method further comprises the following step:
transferring the pressure sensitive adhesive coating (120) from the carrier material on to
the first side (111) of the face (110), or
the second side (112) of the face (110).