Multi-layered dielectric polymer material, capacitor, use of the material and formation method thereof

Patent metadata

Field	Value
Publication number	US-10115522-B2
Application number	US-201615166022-A
Country	US
Kind code	B2
Filing date	May 26, 2016
Priority date	Dec 3, 2013
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A multi-layered dielectric polymer material, a capacitor comprising the multi-layered dielectric polymer material, a use of the multi-layered dielectric polymer material and a method for forming the multi-layered dielectric polymer material are disclosed. The multi-layered dielectric polymer material may comprise a plurality of dielectric layers wherein the plurality of dielectric layers may comprise an identical base material. The base material may be compound with agents for at least one of the plurality of dielectric layers. It may overcome compatible issues for convention multi-layered material. The dielectric polymer material may have increased dielectric strength and excellent thermal properties.

First claim

What is claimed is:

1. A multi-layered dielectric polymer material comprising a plurality of dielectric layers, wherein the plurality of dielectric layers comprises an identical base material, and further wherein the base material is compounded with different nucleating agents respectively for at least two of the plurality of dielectric layers.

2. The multi-layered dielectric polymer material according to claim 1 , wherein the plurality of dielectric layers are coextruded.

3. The multi-layered dielectric polymer material according to claim 1 , wherein the base material comprises any one of polypropylene (PP), polyethylene (PE), crosslinked polyethylene (PEX), polyethylene terephthalate (PET), and polycarbonate (PC), polyethylene naphthalate (PEN), polyphenylene sulfide (PPS), polytetrafluoroethylene (PTFE), polyvinylidene difluoride (PVDF), polyamide (PA), polyimide (PI), polyetherimide (PEI), polyvinyl chloride (PVC), polystyrene (PS), cyanoresins, copolymers thereof, or combination thereof.

4. The multi-layered dielectric polymer material according to claim 1 , wherein the multi-layered dielectric polymer material has an average breakdown strength of at least about 540 V/μm.

5. The multi-layered dielectric polymer material according to claim 1 , wherein the dielectric polymer material has an average thickness ranging from about 1 μm to 20 cm.

6. The multi-layered dielectric polymer material according to claim 1 , wherein the multi-layered dielectric polymer material is in a form of a dielectric polymer film.

7. The multi-layered dielectric polymer material according to claim 6 , wherein the dielectric polymer film has an average thickness ranging from about 1 to 30 μm.

8. The multi-layered dielectric polymer material according to claim 1 , formed into a capacitor, including
a capacitor film composed of the multi-layered dielectric polymer material.

9. The multi-layered dielectric polymer material according to claim 1 , wherein the total amount of the nucleating agents is from about 0.14 wt % to about 5.0 wt %, based on the total weight of the multi-layered dielectric polymer material.

10. A multi-layered dielectric polymer material comprising a plurality of dielectric layers, wherein the plurality of dielectric layers comprises an identical base material, and further wherein the base material is compounded with different contents of nucleating agents respectively for at least two of the plurality of dielectric layers.

11. The multi-layered dielectric polymer material according to claim 10 , wherein the total amount of the nucleating agents is from about 0.14 wt % to about 5.0 wt %, based on the total weight of the multi-layered dielectric polymer material.

12. The multi-layered dielectric polymer material according to claim 11 , wherein at least one of the nucleating agents comprises α-nucleating agent and/or β-nucleating agent.

13. The multi-layered dielectric polymer material according to claim 11 , wherein at least one of the nucleating agents comprises α-nucleating agent and/or β-nucleating agent.

14. A method for forming a multi-layered dielectric polymer material comprising:
feeding an identical base material from a plurality of orifices into a die for co-extrusion; and
co-extruding the base material into a laminar sheet, wherein the laminar sheet comprises a plurality of dielectric layers of the identical base material, wherein the base material is compounded with different nucleating agents respectively for at least two of the plurality of dielectric layers.

15. The method according to claim 14 , wherein the multi-layered dielectric polymer material has an average breakdown strength of at least about 540 V/μm.

16. The method of claim 14 , further comprising:
using the multi-layered dielectric polymer material in electric equipment including capacitors, power bushings, and/or power cables.

17. The method according to claim 14 , further comprising:
stretching the coextruded laminar sheet into a thin film; and
stretching the thin film in both a machine direction and a transverse direction in a simultaneous stretching mode or a sequential stretching mode.

18. A method for forming a multi-layered dielectric polymer material comprising:
feeding an identical base material from a plurality of orifices into a die for co-extrusion; and
co-extruding the base material into a laminar sheet, wherein the laminar sheet comprises a plurality of dielectric layers of the identical base material, wherein the base material is compounded with different contents of nucleating agents respectively for at least two of the plurality of dielectric layers.

Assignees

• Abb Schweiz Ag

Inventors

• Qi Lejun
• Li Nan
• Meng Delun
• Laihonen Sari
• Delince Francois

Classifications

• B32B2307/202

  Conductive · CPC title

• B32B27/322

  comprising halogenated polyolefins, e.g. PTFE · CPC title

• B32B27/20

  using fillers, pigments, thixotroping agents · CPC title

• H01G4/306

  made by thin film techniques · CPC title

• B32B2270/00

  Resin or rubber layer containing a blend of at least two different polymers · CPC title