Description:PLEASE SEE THE ATTACHMENTS. , Claims:We claim:
1.
A method of siloxane coating on zinc or alloy zinc coated steel wire (10), the method comprising:
coating the zinc or alloy zinc coated steel wire (10), by dipping, spray process and combination thereof, onto the steel wire in a coating unit (1) including water borne siloxane-based solution for a first predetermined time at a first predetermined temperature;
subjecting the zinc or alloy zinc coated steel wire (10) to a wiping process, wherein the wiping process comprising:
passage of the zinc or alloy zinc coated steel wire (10) through a combination of wiper unit (2); and
heating the wiped zinc or alloy zinc coated steel wire (10) in a heating unit (3) at a second predetermined temperature observed at a surface of a wire for a predetermined speed, to produce siloxane coated zinc or alloy zinc steel wire.
2.
The method as claimed in claim 1, wherein the first predetermined temperature ranges from 20 ℃ to 50 ℃ and the first predetermined time ranges up to 20 seconds.
3.
The method as claimed in claim 1, wherein the combination of wipers comprises:
a first wiper unit (2a); and
a second wiper unit (2b), wherein wipers of the second wiper unit (2b) are inclined relative to wipers of the first wiper unit in range of 0-90 degrees relative to each other.
4.
The method as claimed in claim 1, wherein the second predetermined temperature of the wire ranges from 90 ℃ to 200 ℃ for the predetermined speed ranging from 40 meters per minutes to 140 meters per minutes.
5.
The method as claimed in claim 1, wherein the composition of siloxane-based solution comprises:
less than 3% organic volatile content;
at least one coloring pigment compound; and
at least an amino silane functional oligomer.
16
6.
The method as claimed in claim 1, wherein the zinc or alloy zinc steel is a galvanized steel wire, galvannealed steel wire, galvalume steel wire, galfan steel wire, Zn-Al-Mg alloy steel wire, and aluminum alloy wire.
7.
The method as claimed in claim 1, wherein siloxane coating thickness ranges from 1 μm to 5 μm.
8.
The method as claimed in claim 1, wherein siloxane coating is configured to impart colour including at least one of blue, green, violet, yellow or colorless.
9.
The method as claimed in claim 1, wherein the heating unit (3) includes induction heater, hot air oven, UV (ultraviolet) curing, EB (electron beam) curing, IR (infrared) heating.
10.
The method as claimed in claim 1, wherein the wiping is one or combination of physical wiping and/or contactless air wiping.
11.
The method as claimed in claim 9, wherein the physical wiping material is at least one or more combination of woolen felt material, cotton material, sponge material, rubber material.
12.
A system of siloxane coating on zinc or alloy zinc coated steel wire (10), the system comprising:
a coating unit (1), configured to contain a siloxane-based solution at a first predetermined temperature, the coating unit (1) adapted to receive the steel wire at a first predetermined time for coating;
a combination of wiper unit (2), configured to receive the coated steel wire, wherein the combination of wipers are inclined relative to each other.
a heating unit (3), configured to receive the wiped coated steel wire at a second predetermined temperature for a predetermined speed, to produce siloxane coated steel wire.
13.
The system as claimed in claim 12, wherein the first predetermined temperature ranges from 25 ℃ to 50 ℃ and the first predetermined time ranges from 2 to 20 seconds.
14.
The system as claimed in claim 12, wherein the combination of wipers comprises:
17
a first wiper unit (2a); configured to receive and wipe the coated steel wire; and
a second wiper unit (2b), configured to receive the coated steel wire from the first wiper unit (2a), wherein wipers of the second wiper unit (2b) is inclined relative to wipers of the first wiper unit (2a), to selectively wipe the coated steel wire.
15.
The system as claimed in claim 12, wherein the wipers of the second wiper unit (2b) is inclined in range of 0 - 90 degrees relative to wipers of the first wiper unit (2a).
16.
The system as claimed in claim 12, wherein the second predetermined temperature ranges from 90 ℃ to 200 ℃ for a predetermined speed of 40 meters per minutes to 140 meters per minutes.
17.
The system as claimed in claim 12, wherein the composition of siloxane-based solution comprises:
less than 3% organic volatile content;
at least one coloring pigment compound; and
at least an amino silane functional oligomer.
18.
The system as claimed in claim 12, wherein the zinc or alloy zinc steel wire is a galvanized steel wire, galvannealed steel wire, galvalume steel wire, galfan steel wire, Zn-Al-Mg alloy steel wire, and aluminum alloy wire.
19.
The system as claimed in claim 12, wherein siloxane coating thickness ranges from 1 μm to 5 μm.
20.
The system as claimed in claim 12, wherein the distance between the coating unit (1) and the first wiper is up to 200 centimeters.
21.
The system as claimed in claim 12, wherein the distance between the first wiper unit (2a) and second wiper unit (2b) is up to 200 centimeters.
22.
The system as claimed in claim 12, wherein the distance between the second wiper unit (2b) and the heating unit (3) is up to 200 centimeters.
23.
The system as claimed in claim 12, wherein the heating unit (3) includes induction heater, hot air oven, UV (ultraviolet) curing, EB (electron beam) curing, IR (infrared) heating.
18
24. The system as claimed in claim 12, wherein the wiping is one or combination of
physical wiping and/or contactless air wiping.
25. The system as claimed in claim 24, wherein the physical wiping material is at least one
or more combination of woolen felt material, cotton material, sponge material, rubber
material.
26. A siloxane coated steel wire produced through the method as claimed in claim 1.