Method for producing graphite film, method for rewinding same, and method for producing graphite composite film and graphite die-cutting product
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C01B-031/00
B65H-018/08
B65H-035/02
B65H-035/04
C01B-031/04
C04B-035/52
C04B-035/524
C04B-035/622
C04B-035/626
C04B-035/634
출원번호
US-0579961
(2011-02-14)
등록번호
US-9249024
(2016-02-02)
우선권정보
JP-2010-035865 (2010-02-22)
국제출원번호
PCT/JP2011/000810
(2011-02-14)
§371/§102 date
20120912
(20120912)
국제공개번호
WO2011/102107
(2011-08-25)
발명자
/ 주소
Ohta, Yusuke
Inada, Takashi
Mishiro, Makoto
Nishikawa, Yasushi
Inada, Takashi
출원인 / 주소
KANEKA CORPORATION
대리인 / 주소
Kagan Binder, PLLC
인용정보
피인용 횟수 :
1인용 특허 :
3
초록▼
A graphite film showing an extremely low average tearing force is more likely to suffer from various kinds of defects, such as splitting, winding deviation, wrinkling, and poor dimensional accuracy, in a step of producing the graphite film and in a step of processing the graphite film. However, thes
A graphite film showing an extremely low average tearing force is more likely to suffer from various kinds of defects, such as splitting, winding deviation, wrinkling, and poor dimensional accuracy, in a step of producing the graphite film and in a step of processing the graphite film. However, these defects can be prevented by using a graphite film that satisfies the following requirements: 1) having an average tearing force of not more than 0.08 N as determined by Trouser tear method in accordance with JIS K7128; and 2) having sag of not less than 5 mm and not greater than 80 mm as determined by a method of film windability evaluation in accordance with JIS C2151.
대표청구항▼
1. A method for rewinding a graphite film, wherein a graphite film with the following features 1) and 2) wrapped around one roll is wound off and wound up around another roll, 1) having an average tearing force of not more than 0.08 N as determined by Trouser tear method in accordance with JIS K7128
1. A method for rewinding a graphite film, wherein a graphite film with the following features 1) and 2) wrapped around one roll is wound off and wound up around another roll, 1) having an average tearing force of not more than 0.08 N as determined by Trouser tear method in accordance with JIS K7128; and2) having sag of not less than 5 mm and not greater than 80 mm as determined by a method of film windability evaluation in accordance with JIS C2151. 2. The method according to claim 1, wherein a value “a” obtained by subtracting (a depth of sag at a point 30 mm away from an outer edge of the film in a TD direction) from (a depth of sag at the outer edge of the film in the TD direction) is not less than 5 mm and not more than 50 mm. 3. The method according to claim 1, wherein the graphite film has camber of not more than 10 mm, as determined by a method of film windability evaluation in accordance with JIS C2151. 4. A method for producing a graphite film, comprising: a step of slitting the graphite film with the following features 1) and 2) by means of a slitter that is placed at any position between a location where the graphite film wrapped around one roll is wound off and a location where the graphite film is wound up around another roll,1) having an average tearing force of not more than 0.08 N as determined by Trouser tear method in accordance with JIS K7128; and2) having sag of not less than 5 mm and not greater than 80 mm as determined by a method of film windability evaluation in accordance with JIS C2151. 5. The method according to claim 4, wherein a value “a” obtained by subtracting (a depth of sag at a point 30 mm away from an outer edge of the film in a TD direction) from (a depth of sag at the outer edge of the film in the TD direction) is not less than 5 mm and not more than 50 mm. 6. The method according to claim 4, wherein the graphite film has camber of not more than 10 mm, as determined by a method of film windability evaluation in accordance with JIS C2151. 7. The method according to claim 4, wherein the graphite film is a graphite film produced by undergoing a carbonization step of subjecting a polymer film to heat treatment, the polymer film being wrapped around a core, andthe carbonization step comprises a vessel constituted by the core and an external cylinder that accommodates the core, the vessel having ventilation. 8. The method according to claim 4, wherein the graphite film is a graphite film produced by undergoing a carbonization step of subjecting a polymer film to heat treatment, the polymer film being wrapped around a core, andat least partially in the carbonization step, depressurization to a pressure in a range from −0.08 MPa to 0.01 kPa is carried out while an inert gas is supplied. 9. The method according to claim 4, wherein the graphite film is a graphite film obtained by a graphite film producing method comprising a graphitization step of subjecting a heat-treated film, which is a carbonized polymer film, to heat treatment at a temperature of not less than 2000° C., the heat-treated film being wrapped around a core, andthe graphitization step comprises a tight wrapping step of tightly wrapping the heat-treated film around the core. 10. A method for producing a graphite film, comprising: a step of compressing the graphite film with the following features 1) and 2), at any position between a location where the graphite film wrapped around one roll is wound off and a location where the graphite film is wound up around another roll,1) having an average tearing force of not more than 0.08 N as determined by Trouser tear method in accordance with JIS K7128; and2) having sag of not less than 5 mm and not greater than 80 mm as determined by a method of film windability evaluation in accordance with JIS C2151. 11. The method according to claim 10, wherein a value “a” obtained by subtracting (a depth of sag at a point 30 mm away from an outer edge of the film in a TD direction) from (a depth of sag at the outer edge of the film in the TD direction) is not less than 5 mm and not more than 50 mm. 12. The method according to claim 10, wherein the graphite film has camber of not more than 10 mm, as determined by a method of film windability evaluation in accordance with JIS C2151. 13. The method according to claim 10, wherein the graphite film has a width of not less than 200 mm. 14. The method according to claim 10, wherein the graphite film is a graphite film produced by undergoing a carbonization step of subjecting a polymer film to heat treatment, the polymer film being wrapped around a core, andthe carbonization step comprises a vessel constituted by the core and an external cylinder that accommodates the core, the vessel having ventilation. 15. The method according to claim 10, wherein the graphite film is a graphite film produced by undergoing a carbonization step of subjecting a polymer film to heat treatment, the polymer film being wrapped around a core, andat least partially in the carbonization step, depressurization to a pressure in a range from −0.08 MPa to 0.01 kPa is carried out while an inert gas is supplied. 16. The method according to claim 10, wherein the graphite film is a graphite film obtained by a graphite film producing method comprising a graphitization step of subjecting a heat-treated film, which is a carbonized polymer film, to heat treatment at a temperature of not less than 2000° C., the heat-treated film being wrapped around a core, andthe graphitization step comprises a tight wrapping step of tightly wrapping the heat-treated film around the core. 17. A method for producing a graphite composite film, comprising: a step of laminating a graphite film with the following features 1) and 2), at any position between a location where the graphite film wrapped around one roll is wound off and a location where the graphite film is wound up around another roll,1) having an average tearing force of not more than 0.08 N as determined by Trouser tear method in accordance with JIS K7128; and2) having sag of not less than 5 mm and not greater than 80 mm as determined by a method of film windability evaluation in accordance with JIS C2151. 18. The method according to claim 17, wherein a value “a” obtained by subtracting (a depth of sag at a point 30 mm away from an outer edge of the film in a TD direction) from (a depth of sag at the outer edge of the film in the TD direction) is not less than 5 mm and not more than 50 mm. 19. The method according to claim 17, wherein the graphite film has camber of not more than 10 mm, as determined by a method of film windability evaluation in accordance with JIS C2151. 20. The method according to claim 17, wherein the graphite film has a width of not less than 200 mm. 21. The method according to claim 17, wherein an angle b formed by a line connecting a starting point of contact between the graphite film and a first roll and a center point of the first roll and a line connecting the center point of the first roll and a point of contact between the first roll and a second roll is not less than 5 degrees. 22. The method according to claim 17, wherein: the graphite composite film is produced by laminating the graphite film to a sheet having a self-adhesive layer or an adhesive layer, the sheet having a thickness of not more than 60 μm. 23. The method according to claim 17, wherein: the sheet having the self-adhesive layer or the adhesive layer is continuously supplied between the first roll and the second roll while a separator is peeled off from the sheet, andan angle at which the separator is peeled off from the sheet is not greater than 90 degrees. 24. The method according to claim 17, wherein (a length of the sheet having the self-adhesive layer or adhesive layer in the TD direction) is larger by not less than 5 mm than (a length of the graphite film in the TD direction). 25. The method according to claim 17, wherein the first roll and the second roll are a combination of a crown roll and a flat roll. 26. The method according to claim 17, wherein the graphite film is a graphite film produced by undergoing a carbonization step of subjecting a polymer film to heat treatment, the polymer film being wrapped around a core, andthe carbonization step comprises a vessel constituted by the core and an external cylinder that accommodates the core, the vessel having ventilation. 27. The method according to claim 17, wherein the graphite film is a graphite film produced by undergoing a carbonization step of subjecting a polymer film to heat treatment, the polymer film being wrapped around a core, andat least partially in the carbonization step, depressurization to a pressure in a range from −0.08 MPa to 0.01 kPa is carried out while an inert gas is supplied. 28. The method according to claim 17, wherein the graphite film is a graphite film obtained by a graphite film producing method comprising a graphitization step of subjecting a heat-treated film, which is a carbonized polymer film, to heat treatment at a temperature of not less than 2000° C., the heat-treated film being wrapped around a core, andthe graphitization step comprises a tight wrapping step of tightly wrapping the heat-treated film around the core. 29. A method for producing a graphite die-cutting product, comprising: a step of die-cutting a graphite film with the following features 1) and 2) wrapped around one roll or a graphite composite film according to claim 17 wrapped around one roll, at any position between a location where the graphite film or the graphite composite film is wound off and a location where the graphite film or the graphite composite film is wound up around another roll,1) having an average tearing force of not more than 0.08 N as determined by Trouser tear method in accordance with JIS K7128; and2) having sag of not less than 5 mm and not greater than 80 mm as determined by a method of film windability evaluation in accordance with JIS C2151. 30. The method according to claim 29, wherein a graphite film according to claim 29 is such that a value “a” obtained by subtracting (a depth of sag at a point 30 mm away from an outer edge of the film in a TD direction) from (a depth of sag at the outer edge of the film in the TD direction) is not less than 5 mm and not more than 50 mm. 31. The method according to claim 29, wherein a graphite film according to claim 29 has camber of not more than 10 mm, as determined by a method of film windability evaluation in accordance with JIS C2151. 32. The method according to claim 29, comprising: a step of forming a sheet having (i) a graphite film according to claim 29 and (ii) a self-adhesive layer or an adhesive layer formed at least on one side of the graphite film; anda half-cutting step. 33. The method according to claim 29, comprising: a step of coating a part of an edge of a graphite film according to claim 29 with a sheet having a self-adhesive layer or an adhesive layer. 34. The method according to claim 29, wherein a graphite film according to claim 29 is a graphite film produced by undergoing a carbonization step of subjecting a polymer film to heat treatment, the polymer film being wrapped around a core, andthe carbonization step comprises a vessel constituted by the core and an external cylinder that accommodates the core, the vessel having ventilation. 35. The method according to claim 29, wherein a graphite film according to claim 29 is a graphite film produced by undergoing a carbonization step of subjecting a polymer film to heat treatment, the polymer film being wrapped around a core, andat least partially in the carbonization step, depressurization to a pressure in a range from −0.08 MPa to 0.01 kPa is carried out while an inert gas is supplied. 36. The method according to claim 29, wherein a graphite film according to claim 29 is a graphite film obtained by a graphite film producing method comprising a graphitization step of subjecting a heat-treated film, which is a carbonized polymer film, to heat treatment at a temperature of not less than 2000° C., the heat-treated film being wrapped around a core, andthe graphitization step comprises: a tight wrapping step of tightly wrapping the heat-treated film around the core. 37. The method according to claim 29, wherein a graphite film utilized for a graphite composite film according to claim 29 is such that a value “a” obtained by subtracting (a depth of sag at a point 30 mm away from an outer edge of the film in a TD direction) from (a depth of sag at the outer edge of the film in the TD direction) is not less than 5 mm and not more than 50 mm. 38. The method according to claim 29, wherein a graphite film utilized for a graphite composite film according to claim 29 has camber of not more than 10 mm, as determined by a method of film windability evaluation in accordance with JIS C2151. 39. The method according to claim 29, comprising: a step of forming a sheet having (i) a graphite film utilized for a graphite composite film according to claim 29 and (ii) a self-adhesive layer or an adhesive layer formed at least on one side of the graphite film; anda half-cutting step. 40. The method according to claim 29, comprising: a step of coating a part of an edge of a graphite film utilized for a graphite composite film according to claim 29 with a sheet having a self-adhesive layer or an adhesive layer. 41. The method according to claim 29, wherein a graphite film utilized for a graphite composite film according to claim 29 is a graphite film produced by undergoing a carbonization step of subjecting a polymer film to heat treatment, the polymer film being wrapped around a core, andthe carbonization step comprises a vessel constituted by the core and an external cylinder that accommodates the core, the vessel having ventilation. 42. The method according to claim 29, wherein a graphite film utilized for a graphite composite film according to claim 29 is a graphite film produced by undergoing a carbonization step of subjecting a polymer film to heat treatment, the polymer film being wrapped around a core, andat least partially in the carbonization step, depressurization to a pressure in a range from −0.08 MPa to 0.01 kPa is carried out while an inert gas is supplied. 43. The method according to claim 29, wherein a graphite film utilized for a graphite composite film according to claim 29 is a graphite film obtained by a graphite film producing method comprising a graphitization step of subjecting a heat-treated film, which is a carbonized polymer film, to heat treatment at a temperature of not less than 2000° C., the heat-treated film being wrapped around a core, andthe graphitization step comprises: a tight wrapping step of tightly wrapping the heat-treated film around the core. 44. The method according to claim 1, wherein the graphite film utilized in rewinding is a graphite film obtained by subjecting a polymer film to heat treatment at a temperature of not less than 2000° C. in such a state that the polymer film is wrapped with its first side facing inside. 45. The method according to claim 4, wherein the graphite film utilized in slitting is a graphite film obtained by subjecting a polymer film to heat treatment at a temperature of not less than 2000° C. in such a state that the polymer film is wrapped with its first side facing inside. 46. The method according to claim 10, wherein the graphite film utilized in compression is a graphite film obtained by subjecting a polymer film to heat treatment at a temperature of not less than 2000° C. in such a state that the polymer film is wrapped with its first side facing inside. 47. The method according to claim 17, wherein the graphite film utilized in laminating is a graphite film obtained by subjecting a polymer film to heat treatment at a temperature of not less than 2000° C. in such a state that the polymer film is wrapped with its first side facing inside. 48. The method according to claim 29, wherein the graphite film utilized in die-cutting is a graphite film obtained by subjecting a polymer film to heat treatment at a temperature of not less than 2000° C. in such a state that the polymer film is wrapped with its first side facing inside. 49. The method according to claim 37, wherein the graphite film which is utilized for a graphite composite film utilized in die-cutting is a graphite film obtained by subjecting a polymer film to heat treatment at a temperature of not less than 2000° C. in such a state that the polymer film is wrapped with its first side facing inside. 50. A graphite film, having an average tearing force of not more than 0.08 N as determined by Trouser tear method in accordance with JIS K7128, andhaving sag of not less than 5 mm and not greater than 80 mm as determined by a method of film windability evaluation in accordance with JIS C2151.
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