US 12,186,987 B2
Method for producing an adhesive filament, and adhesive filament
Frank Virus, Hamburg (DE); Michael Schwertfeger, Hamburg (DE); and Manuel Bendeich, Hamburg (DE)
Assigned to TESA SE, Norderstedt (DE)
Appl. No. 17/416,252
Filed by TESA SE, Norderstedt (DE)
PCT Filed Dec. 17, 2019, PCT No. PCT/EP2019/085754
§ 371(c)(1), (2) Date Jun. 18, 2021,
PCT Pub. No. WO2020/127348, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 10 2018 222 371.8 (DE), filed on Dec. 19, 2018.
Prior Publication US 2022/0072789 A1, Mar. 10, 2022
Int. Cl. B29C 64/314 (2017.01); B29K 105/00 (2006.01); B33Y 40/10 (2020.01); B33Y 70/00 (2020.01); C09J 7/10 (2018.01); C09J 11/04 (2006.01); C23C 4/11 (2016.01); C23C 4/134 (2016.01)
CPC B29C 64/314 (2017.08) [B33Y 40/10 (2020.01); B33Y 70/00 (2014.12); C09J 7/10 (2018.01); C09J 11/04 (2013.01); C23C 4/11 (2016.01); C23C 4/134 (2016.01); B29K 2105/0097 (2013.01); C09J 2301/302 (2020.08)] 15 Claims
OG exemplary drawing
 
1. A method for producing a filament of adhesive from a pressure sensitive adhesive, the method comprising:
a) providing the pressure sensitive adhesive;
b) shaping the pressure sensitive adhesive into a material strand having a surface;
c) treating at least one subregion of the surface of the material strand with a plasma stream, the plasma stream emerging from an opening of a plasma nozzle and being passed over the at least one subregion of the surface of the material strand, wherein, through the plasma stream, a passivating layer is deposited onto the at least one subregion of the surface of the material strand; and
d) applying a passivating agent to the material strand, wherein the passivating agent comprises talc or pulverulent chalk or fumed silica or quartz flour or limestone flour or ground barite or ground mica,
wherein the at least one subregion of the surface of the material strand is treated under a reduced pressure between 0.1 to 0.4 mbar.