A SURFACE TREATMENT METHOD FOR A POLYMER FILM
The present disclosure relates to a surface treatment method for a polymer film and to a use of a surface treated polymer film according to this method in the production of packaging material, in particular food packaging. The surface treatment method for a polymer film comprises providing information about at least the polymer film to a surface treatment device ( 102 ), adjusting at the surface treatment device at least one of a discharge of ions and a residence time of the polymer film in the surface treatment device based on the information ( 103 ), and applying the discharge of ions to a surface of the polymer film during the residence time of the polymer film in the surface treatment device to obtain a treated surface of the polymer film ( 104 ).
1 . A surface treatment method for a polymer film, comprising:
providing information about at least the polymer film to a surface treatment device;
adjusting at the surface treatment device at least one of a discharge of charged particles, and a residence time of the polymer film in the surface treatment device based on the information; and
applying the discharge of charged particles to a surface of the polymer film during the residence time of the polymer film in the surface treatment device to obtain a surface treated polymer film
wherein providing information about at least the polymer film to a surface treatment device further comprises providing at least one of a material density and a surface atom density.
2 . The surface treatment method according to claim 1 , wherein at least part of the surface of the polymer film comprises a polymeric coating.
3 . The surface treatment method according to claim 2 , wherein the polymeric coating comprises at least one of polyolefin, polyester, polyurethane, polyacrylate, and polysiloxane.
4 . (canceled)
5 . The surface treatment method according to claim 1 , wherein providing at least one of a material density and a surface atom density comprises providing at least one of a material density of the polymer film, a surface atom density of the polymer film, a material density of the polymeric coating, and a surface atom density of the polymeric coating.
6 . The surface treatment method according to claim 1 , wherein providing at least one of a material density and a surface atom density further comprises calculating with an algorithm the surface atom density of at least one of the polymer film and the polymeric coating based on the information about at least one of the polymer film and the polymeric coating.
7 . The surface treatment method according to claim 1 , wherein adjusting at the surface treatment device at least one of a discharge of charged particles and a residence time of the polymer film in the surface treatment device based on the information further comprises at least one of:
calculating with an algorithm a charged particle dose for treatment of at least one of the polymer film and the polymeric coating based on at least one of a discharge electric current, an electrode area, and the residence time;
calculating with an algorithm a charged particles energy for treatment of at least one of the polymer film and the polymeric coating;
calculating with an algorithm the residence time of the polymer film in the surface treatment device based on at least one dimension of the surface treatment device in the machine direction and a polymer film conveyance speed in the machine direction; and
selecting a process gas.
8 . The surface treatment method according to claim 1 , wherein the polymer film comprises at least one of polyolefin, polyester, polyurethane, polyacrylate, and polysiloxane.
9 . The surface treatment method according to claim 3 , wherein the polyolefin comprises at least one of polyethylene and polypropylene, the polyester comprises at least polyethylene terephthalate, or the polyacrylate comprises at least one of polymethacrylate, poly(methyl)methacrylate, polyacrylonitrile, and polyacrylamide.
10 . The surface treatment method according to claim 1 , wherein the method further comprises at least one of analyzing the treated surface of the polymer film and analyzing a treated polymeric coating.
11 . The surface treatment method according to claim 7 , wherein the process gas is inorganic.
12 . The surface treatment method according to claim 1 , wherein the surface treatment device is an electron treatment device of a plasma treatment device.
13 . The surface treatment method according to claim 7 , wherein the charged particle dose for treatment of at least one of the polymer film and the polymeric coating comprises 4×10 14 to 6×10 15 charged particles/cm 2 .
14 . The surface treatment method according to claim 7 , wherein the charged particles energy for treatment of at least one of the polymer film and/or the polymeric coating comprises 100 eV to 9000 eV.
15 . A surface treatment method for a polymer film, comprising:
providing information about at least one of the polymer film and a polymeric coating to a surface treatment device;
calculating with an algorithm the surface atom density of at least one of the polymer film and the polymeric coating based on the information about at least one of the polymer film and the polymeric coating
calculating with an algorithm the residence time of the polymer film in the surface treatment device based on at least one dimension of the surface treatment device in the machine direction and a polymer film conveyance speed in the machine direction;
calculating with an algorithm a charged particle dose for treatment of at least one of the polymer film and the polymeric coating based on at least one of a discharge electric current, an electrode area, and the residence time;
adjusting at the surface treatment device at least one of a discharge of charged particles and a residence time of the polymer film in the surface treatment device based on the information; and
applying the discharge of charged particles to a surface of the polymer film during the residence time of the polymer film in the surface treatment device to obtain a surface treated polymer film.
16 . The surface treatment method according to claim 11 , wherein the process gas comprises at least one of argon, oxygen, nitrogen, helium, and neon.
17 . The surface treatment method according to claim 12 , wherein a plasma source of the plasma treatment device is at least one of glow discharge, bipolar magnetron, capacitively coupled discharge, inductively coupled discharge, microwave discharge, and electron cyclotron resonance.
18 . The surface treatment method according to claim 13 , wherein the charged particle dose for treatment of at least one of the polymer film and the polymeric coating comprises 6×1014 to 4×1015 charged particles/cm2.
19 . The surface treatment method according to claim 13 , wherein the charged particle dose for treatment of at least one of the polymer film and the polymeric coating comprises 8×1014 to 2×1015 charged particles/cm2.
20 . The surface treatment method according to claim 14 , wherein the charged particle energy for treatment of at least one of the polymer film and the polymeric coating comprises 200 eV to 7000 eV.