WO2004096899A1 - 劣化アセテートフィルムの酸成分除去方法 - Google Patents
劣化アセテートフィルムの酸成分除去方法 Download PDFInfo
- Publication number
- WO2004096899A1 WO2004096899A1 PCT/JP2004/000232 JP2004000232W WO2004096899A1 WO 2004096899 A1 WO2004096899 A1 WO 2004096899A1 JP 2004000232 W JP2004000232 W JP 2004000232W WO 2004096899 A1 WO2004096899 A1 WO 2004096899A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- acid component
- acetate film
- film
- deteriorated
- treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/02—Solvent extraction of solids
- B01D11/0203—Solvent extraction of solids with a supercritical fluid
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F18/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid
- C08F18/02—Esters of monocarboxylic acids
- C08F18/04—Vinyl esters
- C08F18/08—Vinyl acetate
Definitions
- the present invention relates to a method for removing an acid component resulting from deterioration of an acetate film due to storage from a surface thereof and particularly from the inside.
- the present invention relates to a method for suppressing deterioration of a developed acetate film due to storage by the method.
- Senorelose acetate film also called acetate film or cellulose acetate film
- acetate film or cellulose acetate film has been widely used as a film base that is stable for information storage and can be stored for a long period of time (for example, NS Allen, J. Org. Photogr. Sci. 36, 194-198, 1988).
- An object of the present invention is to provide a method for removing an acid component on the surface and inside caused by deterioration due to storage of an acetate film.
- Still another object of the present invention is to provide a method for suppressing the deterioration of the developed acetate film due to storage by such a method.
- acetate film-based eg, cellulose triacetate, sometimes referred to as “TACJ”
- TACJ cellulose triacetate
- Acid components including acetic acid Deterioration progresses substantially only when it occurs not only on the film surface but also inside the film base, and the free acid component is removed not only from the film surface but also from the inside of the film base to a specific acidity or less. We found that it was possible to suppress it, and completed Honkiaki.
- the present invention is a method for removing an acid component of a deteriorated acetate film, wherein the acid component is extracted and removed not only from the surface of the deteriorated acetate film but also from the inside thereof, and preferably, the acidity is reduced. It is characterized in that it is smaller than a predetermined threshold value (for example, 0.5).
- the remaining acid component may be removed by evaporating by heating under reduced pressure and / or heating.
- the present invention is also characterized in that the acid component is removed by evaporating the degraded acetate film by reducing the pressure and / or heating.
- the acidity is reduced to less than 0.5.
- the present invention provides a method for removing the acid component on the surface and inside of the developed acetate film by the method described above, and preferably reducing the acidity of the developed acetate film to less than 0.5 by acid degradation of the developed acetate film. Methods for suppressing acceleration are also included.
- FIG. 1 shows the TG curves of the deteriorated acetate film before the treatment and after the treatment at 100 ° C. for 2 hours.
- acetate film refers to various film-based materials that have been esterified with acetate. This esterification usually refers to a triesterification, specifically, a cellulose triacetate film. When this film degrades under normal storage conditions, the acetate is hydrolyzed to produce an acid component (eg, acetic acid).
- an acid component eg, acetic acid
- T the shape of this acetate film
- T it may be wound on a reel or stretched. Most of the acetate films are stored in a state of being wound on a reel (made of resin), so it is desirable to carry out the acid component removing method of the present invention as it is.
- developed acetate film means a film in which information is developed as an image on a microphone opening film of an acetate film for information storage. Therefore, there is no limit on the amount or type of the information. For example, information based on characters, pictures, and photographs can be cited. It includes not only binary data such as black and white, but also gray tones such as black and white, and also color data.
- the term “deterioration” refers to discoloration, fading, mold, sticking that occurs when acetate films (including developed acetate films) are stored under normal storage conditions. Crack means crack, microscopic premish, etc. Particularly remarkable phenomena include (vinegar) acid odor, wavy, sticky film, deposition of white powder, and base blasting of the film.
- the acid odor is due to liberation of an acid component due to deterioration.
- deterioration proceeds at a rate higher than expected (greater than expected) means, for example, when the acidity exceeds or is close to a threshold value that causes the so-called "vinegar syndrome” This is different from the deterioration expected to progress slowly in storage at low humidity and low temperature (for example, 30 RH%, 20 ° C), which are preferable storage conditions for acetate films. Therefore, to substantially suppress the progress of deterioration means to suppress the progress of the automatic accelerated deterioration due to the above “Vinegar syndrome”, and to completely prevent normal deterioration. is not.
- cidity J means a value measured on the basis of ANSI stan d IT 9.1-1992.
- the “acid component” is a substance exhibiting an acidic odor emitted from the deteriorated acetate film, and includes, for example, acetic acid, butyric acid, propionic acid, or a mixture thereof. (Method of removing acid component from deteriorated acetate film Part 1)
- the present invention is characterized by extracting and removing acid components generated by deterioration not only from the surface but also from the inside of the deteriorated acetate film. Further, as a result, the degree of removal of the acid component is characterized in that the acidity is smaller than a predetermined threshold value.
- the threshold value of the acidity is about 0.5, but a known acceleration test can be used for calculating the threshold value.
- the extraction of the acid component refers to the extraction of the free acid component not only on the surface of the film but also inside the film without impairing the characteristics of the film (especially, in the case of a developed film, including the image). Means to remove. Therefore, after extraction, the amount of free acid components present not only on the surface of the film but also inside it is below a certain value (threshold value, which does not cause “vinegar syndrome”).
- a specific method for removing an acid component from a deteriorated acetate film according to the present invention includes extracting an acid component by a solvent extraction treatment.
- the solvent extraction treatment means that by contacting the deteriorated film with a specific solvent, free acid components existing not only on the film surface but also inside the film are transferred to the solvent phase and extracted and removed.
- the solvent that can be used is not particularly limited as long as it does not impair the properties of the film or the developed image, and some of the acid components to be extracted can be present. Examples of such a solvent include various organic solvents and inorganic solvents.
- Preferred solvents include those in the super (sub) critical state. Particularly preferred is carbon dioxide in a super (sub) critical state (also referred to herein as supercritical carbon dioxide).
- the acidity after extraction may be measured so that the acidity is equal to or less than a set threshold value (for example, 0.5).
- a particularly preferred embodiment of the present invention is characterized in that a deteriorated acetate film wound on a metal reel is subjected to a solvent extraction treatment using supercritical carbon dioxide. At that time, it is required to rewind the film from a state in which the film is wound on a resin reel which is in a normal storage state to a metal reel.
- a specific method of the method for removing an acid component from a deteriorated acetate film according to the present invention includes removing an evaporable acid component not only from the film surface but also from the inside thereof by a reduced pressure treatment.
- the pressure, temperature, and time used for such processing are not particularly limited as long as the film characteristics and the developed image are not impaired.
- the acidity after the treatment is measured, and the acidity may be set to be equal to or less than a set threshold value (for example, 0.5).
- a set threshold value for example, 0.5
- a normal rotary vacuum pump or diffusion high vacuum pump can be used. It is also preferable to heat the film within a range that does not impair the film properties. If necessary, it is preferable to perform the treatment while flowing an inert gas such as nitrogen or argon.
- the degree of pressure reduction and the temperature range to be applied can be appropriately selected according to the storage state and shape of the deteriorated film. If the deteriorated film is poorly stored and contains a lot of acidic components, it is preferable to reduce the pressure as much as possible and treat the film at an appropriate temperature for a sufficient time until the required acidity is reached. For this purpose, it is preferable to measure the physical properties of the deteriorated film before processing in order to set optimum processing conditions.
- the type and amount of the volatile acid component and the upper limit of the temperature to be added can be easily determined by thermal analysis measurement such as TG and DMA.
- a method combining the first method (extraction solvent treatment) and the second method (vacuum heating treatment) is also available. It is possible. This method removes acid components generated by deterioration not only from the surface but also from the inside of the deteriorated acetate film by extracting it with a solvent and removing the acid component. Thereafter, removing any traces of acid components that may remain by reducing pressure and / or heating according to the second method.
- the acid component removal method according to the present invention described above makes it possible to suppress a state in which the developed acetate film stored for a certain period of time is in a so-called “vinegar syndrome” state and is rapidly deteriorating. Therefore, after the treatment according to the present invention, the cells can be stored for an expected period of time under normal storage conditions, not in the state of “vinegar syndrome”.
- the extracted components were collected by trapping the mixed gas (CO 2 and extracted components) with heavy chloroform / REM when the pressure inside the supercritical cell was reduced to normal pressure.
- the molecular structures of the extracted components were analyzed by -NMR and 13C- NMR. From 3 ⁇ 4-NMR, a signal of hydrogen belonging to the methyl group of CH 3 C0 2 H (acetic acid) was observed at around 2. lppra, and a signal of carboxyl group hydrogen was observed at around 11.2 ppm. Also from 13 (-(), a methyl group carbon signal in CH 3 COOH was observed at around 26 ppm, and a carboxy group carbon signal was observed at around 175 ppm.
- 3 ⁇ 4- ⁇ ⁇ ⁇ ⁇ R and 13 C-MR also indicate signals other than those attributable to acetic acid. Since it was at the noise level, it was found that the main component was acetic acid (the extracted gas smelled acetic acid).
- the jet structure and the 3.3 wt% weight loss are as follows. Hydrolysis components of 3-substituted cellulose acetate unit (2-substituted cellulose acetate unit + acetic acid) and 2-substituted cellulose acetate unit are 306.09 g nomole and 246.007 g / mol, respectively. . For this reason, when acetic acid is desorbed from 1 mol of (2-substituted cellulose acetate + acetic acid), the weight is reduced by 19.61 wt% from the cellulose cut. -Since the extracted component is almost 100% acetic acid, it is considered that one acetic acid was desorbed to 6.2 monomer units (5.2 + 1) based on the 3.3 wt% weight loss. Can be
- the processed film had almost no acetic acid odor, and the developed image was not damaged.
- the thermal analysis and mechanical properties of the film did not change significantly by the treatment, and it was found that only the evaporative acid component was removed by the treatment.
- the processed film showed almost no acetic acid odor, and the developed image was not damaged.
- the thermal analysis and mechanical properties of the film were not significantly changed by the treatment, and it was confirmed that, under the prescribed treatment conditions, only the evaporative acid component was removed by the treatment.
- Table 2 shows the change in weight of the sample film before and after the treatment.
- the processed film had almost no acetic acid odor, and the developed image was not damaged.
- the thermal analysis and mechanical properties of the film did not change significantly by the treatment, and it was found that only the evaporative acid component was removed by the treatment.
- Table 3 shows the weight change of the sample film before and after the treatment.
- Table 4 shows the change in weight of the sample film before and after the treatment.
- the acid component of the deteriorated acetate film can be removed not only from the surface but also from the inside thereof to a predetermined value or less.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/485,383 US7144461B2 (en) | 2003-04-28 | 2004-01-15 | Method of removing acid component in deteriorated acetate film |
| JP2005505817A JP4714887B2 (ja) | 2003-04-28 | 2004-01-15 | 劣化アセテートフィルムの酸成分除去方法 |
| KR1020047001503A KR101085363B1 (ko) | 2003-04-28 | 2004-01-15 | 열화 아세테이트 필름의 산 성분 제거방법 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003123828 | 2003-04-28 | ||
| JP2003-123828 | 2003-04-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004096899A1 true WO2004096899A1 (ja) | 2004-11-11 |
Family
ID=33410139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/000232 Ceased WO2004096899A1 (ja) | 2003-04-28 | 2004-01-15 | 劣化アセテートフィルムの酸成分除去方法 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7144461B2 (ja) |
| JP (1) | JP4714887B2 (ja) |
| KR (1) | KR101085363B1 (ja) |
| CN (1) | CN1697677A (ja) |
| WO (1) | WO2004096899A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5176049B2 (ja) * | 2008-07-11 | 2013-04-03 | 株式会社シンプルウェイ | 光学画像記録フイルムの修復方法及び修復された光学画像記録フイルム |
| JP2016503338A (ja) * | 2012-11-01 | 2016-02-04 | スペクトラ システムズ コーポレーション | 紙幣およびセキュリティ保護された文書の超臨界流体洗浄 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106773519B (zh) * | 2017-01-12 | 2018-07-10 | 陕西师范大学 | 一种粘结胶卷的无损揭取方法 |
| CN108333863B (zh) * | 2018-01-26 | 2019-08-06 | 陕西师范大学 | 一种粘结的电影胶片的揭取装置及揭取方法 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002179819A (ja) * | 2000-12-11 | 2002-06-26 | Konica Corp | セルロースエステルフィルム、セルロースエステルフィルムの製造方法、光学素子、偏光板用保護フィルム、偏光板、表示装置 |
| JP2003171485A (ja) * | 2001-12-04 | 2003-06-20 | Yoshiyuki Namita | 樹脂フイルムの処理法 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1925564A (en) * | 1930-05-24 | 1933-09-05 | Eastman Kodak Co | Process for the reclamation of film scrap with permanganate solutions |
| US2332169A (en) * | 1939-02-06 | 1943-10-19 | Albert A Robbins | Method of greaseproofing porous materials |
| US2953464A (en) * | 1951-06-30 | 1960-09-20 | Monsanto Chemicals | Fire-retardant cellulosic compositions and process for producing fire-retard-ant cellulsoic structures therefrom |
| US2952880A (en) * | 1951-06-30 | 1960-09-20 | Monsanto Chemicals | Fire-retardant cellulosic compositions and process for producing fire-retardant cellulosic structures therefrom |
| US3099584A (en) * | 1960-08-08 | 1963-07-30 | Eastman Kodak Co | Method for the removal of magnetic sound track from movie film |
| US4098996A (en) * | 1977-02-22 | 1978-07-04 | Fmc Corporation | Regenerated cellulose film recovery process |
| US6537737B1 (en) * | 2001-11-26 | 2003-03-25 | George E Wagner | Method and apparatus for restoring faded color film and enhancing black and white film |
-
2004
- 2004-01-15 CN CNA2004800000010A patent/CN1697677A/zh active Pending
- 2004-01-15 KR KR1020047001503A patent/KR101085363B1/ko not_active Expired - Fee Related
- 2004-01-15 JP JP2005505817A patent/JP4714887B2/ja not_active Expired - Lifetime
- 2004-01-15 WO PCT/JP2004/000232 patent/WO2004096899A1/ja not_active Ceased
- 2004-01-15 US US10/485,383 patent/US7144461B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002179819A (ja) * | 2000-12-11 | 2002-06-26 | Konica Corp | セルロースエステルフィルム、セルロースエステルフィルムの製造方法、光学素子、偏光板用保護フィルム、偏光板、表示装置 |
| JP2003171485A (ja) * | 2001-12-04 | 2003-06-20 | Yoshiyuki Namita | 樹脂フイルムの処理法 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5176049B2 (ja) * | 2008-07-11 | 2013-04-03 | 株式会社シンプルウェイ | 光学画像記録フイルムの修復方法及び修復された光学画像記録フイルム |
| JP2016503338A (ja) * | 2012-11-01 | 2016-02-04 | スペクトラ システムズ コーポレーション | 紙幣およびセキュリティ保護された文書の超臨界流体洗浄 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1697677A (zh) | 2005-11-16 |
| US20060054185A1 (en) | 2006-03-16 |
| JP4714887B2 (ja) | 2011-06-29 |
| US7144461B2 (en) | 2006-12-05 |
| KR20060008837A (ko) | 2006-01-27 |
| JPWO2004096899A1 (ja) | 2006-07-13 |
| KR101085363B1 (ko) | 2011-11-21 |
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