Heating delivery element for a shaving razor
A heat delivery element for a shaving razor with a face plate having a skin contacting surface and an opposing inner surface. A heater having a heater track is positioned between an upper dielectric layer and a lower dielectric layer. A heat dispersion layer having a lower surface directly contacts the inner surface of the face plate. An upper surface of the heat dispersion layer directly contacts the lower dielectric layer of the heater.
1. A heat delivery element for a shaving razor comprising:
a face plate having a skin contacting surface and an opposing inner surface;
a heater having a heater track positioned between an upper dielectric layer and a lower dielectric layer; and
a heat dispersion layer having a lower surface directly contacting the inner surface of the face plate and an upper surface directly contacting the lower dielectric layer of the heater;
and a compressible thermal insulation layer positioned on one of the dielectric layers.
2. A heat delivery element of claim 1 wherein at least one of the upper dielectric layer and the lower dielectric layer comprises polyimide.
3. The heat delivery element of claim 1 wherein the heat dispersion layer comprises graphite foil.
4. The heat delivery element of claim 3 wherein the heat dispersion layer is compressed by 20% to 50% of an original thickness.
5. The heat delivery element of claim 4 wherein the heat dispersion layer has a compressed thickness of 50 to 300 μm.
6. The heat delivery element of claim 1 wherein the compressible thermal insulation layer has a thermal conductivity less than 0.10 W/mk.
7. The heat delivery element of claim 1 wherein the compressible thermal insulation layer comprises a compressible foam.
8. The heat delivery element of claim 7 wherein the compressible thermal insulation layer is compressed 30 percent to 70 percent from an original thickness.
9. The heat delivery element of claim 7 wherein the compressible thermal insulation layer has a compressed thickness of 400 to 800 μm.
10. The heat delivery element of claim 1 further comprising a cover secured to the faceplate, wherein the heater and the heat dispersion layer are secured between the face plate and the cover.
11. The heat delivery element of claim 1 wherein the face plate comprises a recessed inner surface opposite the skin contacting surface configured to receive the compressible thermal insulation layer and the heater.
12. The heat delivery element of claim 1 wherein the face plate has a thickness of 100 to 200 μm.
13. The heat delivery element of claim 1 wherein the face plate comprises a material having a thermal conductivity of 10 to 30 W/mk.
14. A heat delivery element for a shaving razor comprising:
a face plate having a skin contacting surface and an opposing inner surface;
a heater having a heater track positioned between an upper dielectric layer and a lower dielectric layer;
a compressible thermal insulation layer positioned on one of the dielectric layers; and
a heat dispersion layer having a lower surface directly contacting the inner surface of the face plate and an upper surface directly contacting the lower dielectric layer of the heater,
wherein the heat dispersion layer comprises graphite foil compressed by 20% to 50% of an original thickness.
15. A heat delivery element of claim 14 wherein the compressible thermal insulation layer has a thermal conductivity less than 0.10 W/mk.
16. The heat delivery element of claim 14 wherein the compressible thermal insulation layer comprises a compressible foam.
17. The heat delivery element of claim 16 wherein the compressible thermal insulation layer is compressed 30 percent to 70 percent from an original thickness.
18. The heat delivery element of claim 14 wherein the compressible thermal insulation layer has a compressed thickness of 400 to 800 μm.
19. The heat delivery element of claim 14 further comprising a cover secured to the face plate, wherein the heater and the heat dispersion layer are secured between the face plate and the cover.