Insulated electric wire
View Patent ↗There is provided a insulated electric wire with an electric conductor on which at least a lubricating layer is formed, in which a lubricant is added to the lubricating layer so that granular bodies, with sizes of 5 nm to 3 μm, which are formed by coagulation of the lubricant disperse on a surface of the lubricating layer.
1. An insulated electric wire with an electric conductor on which at least a lubricating layer is formed, wherein the lubricating layer is formed from resin paint prepared by adding a lubricant, a titanium coupling agent, and a cross-linking agent to a base resin;
the titanium coupling agent has a hydrophilic group and a lipophilic group coupled to a titanium atom; and
the lubricating layer includes coagulation of the lubricant dispersed on a surface of the lubricating layer as granular bodies having sizes of 5 nm to 3 μm.
2. The insulated electric wire according to claim 1 , wherein a friction force of the surface of the lubricating layer is 9 nanonewton (nN) or less when the surface is measured with a scanning probe microscope under a load of 40 nN.
3. The insulated electric wire according to claim 1 , wherein the lubricant is formed from polyolefin wax or fatty acid ester wax or by mixing polyolefin wax and fatty acid ester wax, 1 to 12 parts by mass of the lubricant being added to 100 parts by mass of the base resin.
4. The insulated electric wire according to claim 1 , wherein the cross-linking agent is formed from a polyisocyanate compound in which an isocyanate group at an end thereof is not stabilized by a masking agent.
5. The insulated electric wire according to claim 1 , wherein a ratio of a mass of the titanium coupling agent to a mass of the cross-linking agent is within a range of 1:200 to 1:10.
6. The insulated electric wire according to claim 1 , wherein the base resin of the resin paint is selected from the group consisting of a polyamideimide resin, a polyamide resin, a polyimide resin, a polyester resin, and a polyester imide resin.
7. An insulated electric wire with an electric conductor on which at least a lubricating layer is formed, wherein the lubricating layer is formed from resin paint prepared by adding a lubricant, a titanium coupling agent, and a cross-linking agent to a base resin;
the cross-linking agent is formed from a polyisocyanate compound in which an isocyanate group at an end thereof is not stabilized by a masking agent; and
the lubricating layer includes coagulation of the lubricant dispersed on a surface of the lubricating layer as granular bodies having sizes of 5 nm to 3 μm.
8. The insulated electric wire according to claim 7 , wherein a friction force of the surface of the lubricating layer is 9 nanonewton (nN) or less when the surface is measured with a scanning probe microscope under a load of 40 nN.
9. The insulated electric wire according to claim 7 , wherein the lubricant is formed from polyolefin wax or fatty acid ester wax or by mixing polyolefin wax and fatty acid ester wax, 1 to 12 parts by mass of the lubricant being added to 100 parts by mass of the base resin.
10. The insulated electric wire according to claim 7 , wherein a ratio of a mass of the titanium coupling agent to a mass of the cross-linking agent is within a range of 1:200 to 1:10.
11. The insulated electric wire according to claim 7 , wherein the base resin of the resin paint is selected from the group consisting of a polyamideimide resin, a polyamide resin, a polyimide resin, a polyester resin, and a polyester imide resin.
12. An insulated electric wire comprising:
an electric conductor; and
a lubricating layer disposed over an outer circumference of the electric conductor, the lubricating layer being formed from resin paint including a base resin, a lubricant, a titanium coupling agent, and a cross-linking agent;
wherein the cross-linking agent is formed from a polyisocyanate compound in which an isocyanate group at an end thereof is not stabilized by a masking agent, and
wherein the lubricating layer includes coagulation of the lubricant dispersed on a surface of the lubricating layer as granular bodies having sizes of 5 nm to 3 μm.
13. The insulated electric wire according to claim 12 , wherein the titanium coupling agent has a hydrophilic group and a lipophilic group coupled to a titanium atom.
14. The insulated electric wire according to claim 12 , wherein a friction force of the surface of the lubricating layer is 9 nanonewton (nN) or less when the surface is measured with a scanning probe microscope under a load of 40 nN.
15. The insulated electric wire according to claim 12 , wherein the lubricant is formed from polyolefin wax or fatty acid ester wax or by mixing polyolefin wax and fatty acid ester wax, 1 to 12 parts by mass of the lubricant being added to 100 parts by mass of the base resin.
16. The insulated electric wire according to claim 12 , wherein a ratio of a mass of the titanium coupling agent to a mass of the cross-linking agent is within a range of 1:200 to 1:10.
17. The insulated electric wire according to claim 12 , wherein the base resin of the resin paint is selected from the group consisting of a polyamideimide resin, a polyamide resin, a polyimide resin, a polyester resin, and a polyester imide resin.