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Method for producing carbonaceous film, method for producing graphite film, roll of polymer film, and roll of carbonaceous film
US8992876B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8992876-B2 |
| Application number | US-201214008390-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 26, 2012 |
| Priority date | Mar 28, 2011 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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Disclosed herein is a method for producing an elongated (rolled) carbonaceous film by polymer pyrolysis while suppressing the fusion bonding and the rippling of the carbonaceous film. The method for producing a carbonaceous film includes the step of heat-treating a polymer film wound into a roll, wherein the heat treatment is performed after the polymer film is wound into a roll at a temperature lower than a pyrolysis onset temperature of the polymer film so that the roll of polymer film has a center and has a space inside its cross-sectional circle (50% cross-sectional circle) (space within 50% cross-sectional circle) whose center is at the center and whose circumference passes through a point at which a length of the polymer film from an inner end thereof is 50% of a total length of the polymer film and that an area of the space within 50% cross-sectional circle is 25% or more of an area of the 50% cross-sectional circle. Particularly, providing a space between a core and an innermost layer of the roll of polymer film is more effective at solving the above problem.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing a carbonaceous film, comprising the steps of winding a polymer film into a roll at a temperature lower than a pyrolysis onset temperature of the polymer film to obtain a roll of the polymer film so that i) the cross-section of the roll has an inner portion defined by a first 50% of a total length of the polymer film and an outer portion defined by a second 50% of the total length of the polymer film, ii) the inner portion of the…
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Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US8992876B2 cover?
- Disclosed herein is a method for producing an elongated (rolled) carbonaceous film by polymer pyrolysis while suppressing the fusion bonding and the rippling of the carbonaceous film. The method for producing a carbonaceous film includes the step of heat-treating a polymer film wound into a roll, wherein the heat treatment is performed after the polymer film is wound into a roll at a temperatur…
- Who is the assignee on this patent?
- Mishiro Makoto, Ohta Yusuke, Inada Takashi, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification C01B32/16. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).