A drying device includes a first cylindrical member and a second cylindrical member. The first cylindrical member has an outer peripheral surface having a surface temperature that is higher on one width wise side where an end is present than on the other widthwise side where another end is present,
A drying device includes a first cylindrical member and a second cylindrical member. The first cylindrical member has an outer peripheral surface having a surface temperature that is higher on one width wise side where an end is present than on the other widthwise side where another end is present, whereas the second cylindrical member has an outer peripheral surface having a surface temperature that is lower on the one widthwise side where an end is present than on the other widthwise side where another end is present.
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1. A nonaqueous electrolyte secondary battery separator production method comprising the step of heating a nonaqueous electrolyte secondary battery separator uniformly by use of a first cylindrical member and a second cylindrical member, each of which causes a heating medium to flow inside the first
1. A nonaqueous electrolyte secondary battery separator production method comprising the step of heating a nonaqueous electrolyte secondary battery separator uniformly by use of a first cylindrical member and a second cylindrical member, each of which causes a heating medium to flow inside the first cylindrical member or the second cylindrical member so as to heat the nonaqueous electrolyte secondary battery separator wrapped on an outer peripheral surface of the first cylindrical member or the second cylindrical member, the first cylindrical member and the second cylindrical member being provided so as to be substantially identical in width direction, the heating step including:a first sub-step of wrapping the nonaqueous electrolyte secondary battery separator on the outer peripheral surface of the first cylindrical member, which has a higher surface temperature on one first-end side that is a side corresponding to one end of the first cylindrical member in the width direction, than on the other first-end side that is the other side corresponding to the other end of the first cylindrical member in the width direction; anda second sub-step of wrapping the nonaqueous electrolyte secondary battery separator on the outer peripheral surface of the second cylindrical member, the second cylindrical member having two ends which include one end on the side corresponding to the one end of the first cylindrical member in the width direction and the other end on the other side corresponding to the other end of the first cylindrical member in the width direction, the second cylindrical member having a lower surface temperature on one second-end side that is a side corresponding to the one end of the second cylindrical member in the width direction, than on the other second-end side that is the other side corresponding to the other end of the second cylindrical member in the width direction,wherein the wrapping of the nonaqueous electrolyte secondary battery separator on the outer peripheral surfaces of the first and the second cylindrical members is performed while there is no shifting of the first and second cylindrical members in an axial direction relative to each other. 2. The nonaqueous electrolyte secondary battery separator production method as set forth in claim 1, wherein: in the heating step, the first sub-step is performed plural times and the second sub-step is performed plural times; andthe first sub-step and the second sub-step are performed so as to make a total amount of heat applied to the nonaqueous electrolyte secondary battery separator substantially equal at any point along an width direction of the nonaqueous electrolyte secondary battery separator. 3. The nonaqueous electrolyte secondary battery separator production method as set forth in claim 2, wherein: the first sub-step and the second sub-step are performed alternately. 4. The nonaqueous electrolyte secondary battery separator production method as set forth in claim 2, wherein: in the heating step,after having been supplied from the other first-end side and discharged from a first discharge pipe on the one first-end side, the heating medium flows along an inner peripheral surface of the first cylindrical member from the one first-end side to the other first-end side and is subsequently discharged from the other first-end side; andafter having been supplied from the one second-end side and discharged from a second discharge pipe on the other second-end side, the heating medium flows along an inner peripheral surface of the second cylindrical member from the other second-end side to the one second-end side and is subsequently discharged from the one second-end side. 5. The nonaqueous electrolyte secondary battery separator production method as set forth in claim 4, wherein: the heating medium is discharged from the first discharge pipe toward the one first-end side; andthe heating medium is discharged from the second discharge pipe toward the other second-end side. 6. The nonaqueous electrolyte secondary battery separator production method as set forth in claim 2, wherein: in the heating step,after having been supplied from the one first-end side, the heating medium flows along an inner peripheral surface of the first cylindrical member from the one first-end side to the other first-end side, and is subsequently discharged from the other first-end side; andafter having been supplied from the other second-end side, the heating medium flows along an inner peripheral surface of the second cylindrical member from the other second-end side to the one second-end side and is subsequently discharged from the one second-end side. 7. The nonaqueous electrolyte secondary battery separator production method as set forth in claim 6, wherein: the heating medium is discharged from the first discharge pipe on the one first-end side toward the inner peripheral surface of the first cylindrical member; andthe heating medium is discharged from the second discharge pipe on the other second-end side toward the inner peripheral surface of the second cylindrical member. 8. The nonaqueous electrolyte secondary battery separator production method as set forth in claim 2, wherein: in the heating step,after having been supplied from the other first-end side and discharged from a first discharge pipe on the one first-end side, the heating medium flows along an inner peripheral surface of the first cylindrical member from the one first-end side to the other first-end side and is subsequently discharged from the other first-end side; andafter having been supplied from the other second-end side, the heating medium flows along an inner peripheral surface of the second cylindrical member from the other second-end side to the one second-end side and is subsequently discharged from the one second-end side. 9. The nonaqueous electrolyte secondary battery separator production method as set forth in claim 2, wherein: the first cylindrical member and the second cylindrical member are cylindrical members having an identical structure; andeach of the cylindrical members is positioned in such a manner as to be turned substantially by 180 degrees in width direction of said each of the cylindrical members. 10. The nonaqueous electrolyte secondary battery separator production method as set forth in claim 1, wherein: in the heating step,after having been supplied from the other first-end side and discharged from a first discharge pipe on the one first-end side, the heating medium flows along an inner peripheral surface of the first cylindrical member from the one first-end side to the other first-end side and is subsequently discharged from the other first-end side; andafter having been supplied from the one second-end side and discharged from a second discharge pipe on the other second-end side, the heating medium flows along an inner peripheral surface of the second cylindrical member from the other second-end side to the one second-end side and is subsequently discharged from the one second-end side. 11. The nonaqueous electrolyte secondary battery separator production method as set forth in claim 10, wherein: the heating medium is discharged from the first discharge pipe toward the one first-end side; andthe heating medium is discharged from the second discharge pipe toward the other second-end side. 12. The nonaqueous electrolyte secondary battery separator production method as set forth in claim 1, wherein: in the heating step,after having been supplied from the one first-end side, the heating medium flows along an inner peripheral surface of the first cylindrical member from the one first-end side to the other first-end side, and is subsequently discharged from the other first-end side; andafter having been supplied from the other second-end side, the heating medium flows along an inner peripheral surface of the second cylindrical member from the other second-end side to the one second-end side and is subsequently discharged from the one second-end side. 13. The nonaqueous electrolyte secondary battery separator production method as set forth in claim 12, wherein: the heating medium is discharged from the first discharge pipe on the one first-end side toward the inner peripheral surface of the first cylindrical member; andthe heating medium is discharged from the second discharge pipe on the other second-end side toward the inner peripheral surface of the second cylindrical member. 14. The nonaqueous electrolyte secondary battery separator production method as set forth in claim 1, wherein: in the heating step,after having been supplied from the other first-end side and discharged from a first discharge pipe on the one first-end side, the heating medium flows along an inner peripheral surface of the first cylindrical member from the one first-end side to the other first-end side and is subsequently discharged from the other first-end side; andafter having been supplied from the other second-end side, the heating medium flows along an inner peripheral surface of the second cylindrical member from the other second-end side to the one second-end side and is subsequently discharged from the one second-end side. 15. The nonaqueous electrolyte secondary battery separator production method as set forth in claim 1, wherein: the first cylindrical member and the second cylindrical member are cylindrical members having an identical structure; andeach of the cylindrical members is positioned in such a manner as to be turned substantially by 180 degrees in width direction of said each of the cylindrical members. 16. A nonaqueous electrolyte secondary battery separator production method comprising the step of heating a nonaqueous electrolyte secondary battery separator uniformly by use of a first cylindrical member and a second cylindrical member, each of which causes a heating medium to flow inside the first cylindrical member or the second cylindrical member so as to heat the nonaqueous electrolyte secondary battery separator wrapped on an outer peripheral surface of the first cylindrical member or the second cylindrical member, the first cylindrical member and the second cylindrical member being provided so as to be substantially identical in width direction, the heating step including:a first sub-step of wrapping the nonaqueous electrolyte secondary battery separator on the outer peripheral surface of the first cylindrical member, which is supplied with the heating medium from a side corresponding to one end of the first cylindrical member in the width direction; anda second sub-step of wrapping the nonaqueous electrolyte secondary battery separator on the outer peripheral surface of the second cylindrical member, the second cylindrical member having two ends which include one end on the side corresponding to the one end of the first cylindrical member in the width direction and the other end on the other side opposite to the one side in the width direction, the second cylindrical member being supplied with the heating medium from the other side corresponding to the other end,wherein the wrapping of the nonaqueous electrolyte secondary battery separator on the outer peripheral surfaces of the first and the second cylindrical members is performed while there is no shifting of the first and second cylindrical members in an axial direction relative to each other. 17. A nonaqueous electrolyte secondary battery separator production method comprising the step of heating a nonaqueous electrolyte secondary battery separator by use of a first cylindrical member and a second cylindrical member, each of which causes a heating medium to flow inside the first cylindrical member or the second cylindrical member so as to heat the nonaqueous electrolyte secondary battery separator wrapped on an outer peripheral surface of the first cylindrical member or the second cylindrical member, the first cylindrical member and the second cylindrical member being provided so as to be substantially identical in width direction, wherein the first cylindrical member has a first end and a second end in the width direction and the second cylindrical member has a first end and a second end in the width direction, the heating step including:a first sub-step of wrapping the nonaqueous electrolyte secondary battery separator on the outer peripheral surface of the first cylindrical member, which has a higher surface temperature on the first end than on the second end; anda second sub-step of wrapping the nonaqueous electrolyte secondary battery separator on the outer peripheral surface of the second cylindrical member, the second cylindrical member having a lower surface temperature on the first end than on the second end;wherein the first end of the first cylindrical member and the first end of the second cylindrical member are proximate to a first edge of the separator;wherein the first cylindrical member has a peripheral wall which is thinner on the first end than on the second end; andthe second cylindrical member has a peripheral wall which is thinner on the second end than on the first end. 18. A nonaqueous electrolyte secondary battery separator production method comprising the step of heating a nonaqueous electrolyte secondary battery separator by use of a first cylindrical member and a second cylindrical member, each of which causes a heating medium to flow inside the first cylindrical member or the second cylindrical member so as to heat the nonaqueous electrolyte secondary battery separator wrapped on an outer peripheral surface of the first cylindrical member or the second cylindrical member, the first cylindrical member and the second cylindrical member being provided so as to be substantially identical in width direction, wherein the first cylindrical member has a first end and a second end in the width direction and the second cylindrical member has a first end and a second end in the width direction, the heating step including:a first sub-step of wrapping the nonaqueous electrolyte secondary battery separator on the outer peripheral surface of the first cylindrical member, which has a higher surface temperature on the first end than on the second end; anda second sub-step of wrapping the nonaqueous electrolyte secondary battery separator on the outer peripheral surface of the second cylindrical member, the second cylindrical member having a lower surface temperature on the first end than on the second end;wherein the first end of the first cylindrical member and the first end of the second cylindrical member are proximate to a first edge of the separator,wherein in the heating step, the first sub-step is performed plural times and the second sub-step is performed plural times; andthe first sub-step and the second sub-step are performed so as to make a total amount of heat applied to the nonaqueous electrolyte secondary battery separator substantially equal at any point along a width direction of the nonaqueous electrolyte secondary battery separator;wherein the first cylindrical member has a peripheral wall which is thinner on the first end than on the second end; andthe second cylindrical member has a peripheral wall which is thinner on the second end than on the first end. 19. A nonaqueous electrolyte secondary battery separator production method comprising the step of heating a nonaqueous electrolyte secondary battery separator by use of a first cylindrical member and a second cylindrical member, each of which causes a heating medium to flow inside the first cylindrical member or the second cylindrical member so as to heat the nonaqueous electrolyte secondary battery separator wrapped on an outer peripheral surface of the first cylindrical member or the second cylindrical member, the first cylindrical member and the second cylindrical member being provided so as to be substantially identical in width direction, the heating step including:a first sub-step of wrapping the nonaqueous electrolyte secondary battery separator on the outer peripheral surface of the first cylindrical member, which has a higher surface temperature on one first-end side that is a side corresponding to one end of the first cylindrical member in the width direction, than on the other first-end side that is the other side corresponding to the other end of the first cylindrical member in the width direction; anda second sub-step of wrapping the nonaqueous electrolyte secondary battery separator on the outer peripheral surface of the second cylindrical member, the second cylindrical member having two ends which include one end on the side corresponding to the one end of the first cylindrical member in the width direction and the other end on the other side corresponding to the other end of the first cylindrical member in the width direction, the second cylindrical member having a lower surface temperature on one second-end side that is a side corresponding to the one end of the second cylindrical member in the width direction, than on the other second-end side that is the other side corresponding to the other end of the second cylindrical member in the width direction,wherein the first cylindrical member and the second cylindrical member are cylindrical members having different structures. 20. A nonaqueous electrolyte secondary battery separator production method comprising the step of heating a nonaqueous electrolyte secondary battery separator by use of a first cylindrical member and a second cylindrical member, each of which causes a heating medium to flow inside the first cylindrical member or the second cylindrical member so as to heat the nonaqueous electrolyte secondary battery separator wrapped on an outer peripheral surface of the first cylindrical member or the second cylindrical member, the first cylindrical member and the second cylindrical member being provided so as to be substantially identical in width direction, the heating step including:a first sub-step of wrapping the nonaqueous electrolyte secondary battery separator on the outer peripheral surface of the first cylindrical member, which has a higher surface temperature on one first-end side that is a side corresponding to one end of the first cylindrical member in the width direction, than on the other first-end side that is the other side corresponding to the other end of the first cylindrical member in the width direction; anda second sub-step of wrapping the nonaqueous electrolyte secondary battery separator on the outer peripheral surface of the second cylindrical member, the second cylindrical member having two ends which include one end on the side corresponding to the one end of the first cylindrical member in the width direction and the other end on the other side corresponding to the other end of the first cylindrical member in the width direction, the second cylindrical member having a lower surface temperature on one second-end side that is a side corresponding to the one end of the second cylindrical member in the width direction, than on the other second-end side that is the other side corresponding to the other end of the second cylindrical member in the width direction;wherein in the heating step, the first sub-step is performed plural times and the second sub-step is performed plural times; andthe first sub-step and the second sub-step are performed so as to make a total amount of heat applied to the nonaqueous electrolyte secondary battery separator substantially equal at any point along an width direction of the nonaqueous electrolyte secondary battery separator, and wherein the first cylindrical member and the second cylindrical member are cylindrical members having different structures,wherein the first cylindrical member and the second cylindrical member are cylindrical members having different structures.
Williams Richard C. ; Goettmann James A. ; Funk Gerald L. ; Gee Linda M. ; Smith Roland ; Connolly Timothy ; Mathur Ashish, Wet-laid nonwoven nylon battery separator material.
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