GB405676A - Improvements in films, sheets and the like and processes for their manufacture - Google Patents

Improvements in films, sheets and the like and processes for their manufacture

Info

Publication number
GB405676A
GB405676A GB2215732A GB2215732A GB405676A GB 405676 A GB405676 A GB 405676A GB 2215732 A GB2215732 A GB 2215732A GB 2215732 A GB2215732 A GB 2215732A GB 405676 A GB405676 A GB 405676A
Authority
GB
United Kingdom
Prior art keywords
solvent
mixture
cellulose
dioxane
ester
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.)
Expired
Application number
GB2215732A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Acordis UK Ltd
Henry Dreyfuss Associates LLC
Original Assignee
British Celanese Ltd
Henry Dreyfuss Associates LLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by British Celanese Ltd, Henry Dreyfuss Associates LLC filed Critical British Celanese Ltd
Priority to GB2215732A priority Critical patent/GB405676A/en
Priority to FR758552D priority patent/FR758552A/en
Publication of GB405676A publication Critical patent/GB405676A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/08—Cellulose derivatives
    • C08L1/10—Esters of organic acids, i.e. acylates
    • 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
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/08—Cellulose derivatives
    • C08L1/10—Esters of organic acids, i.e. acylates
    • C08L1/12—Cellulose acetate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/08—Cellulose derivatives
    • C08L1/26—Cellulose ethers
    • 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
    • C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
    • C08J2301/08—Cellulose derivatives
    • C08J2301/10—Esters of organic acids
    • 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
    • C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
    • C08J2301/08—Cellulose derivatives
    • C08J2301/10—Esters of organic acids
    • C08J2301/12—Cellulose acetate
    • 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
    • C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
    • C08J2301/08—Cellulose derivatives
    • C08J2301/26—Cellulose ethers

Abstract

Films, foils, or sheets are obtained by extruding a solution of a cellulose ester or ether in a neutral solvent, solvent mixture, or mixture of solvents, into a coagulating medium containing the same solvent, solvent mixture, or mixture of solvents, and subjecting the coagulated materials to a drying operation, the solvent, or in the case of a mixture of solvents at least one constituent thereof, being less volatile than the non-solvent so that during drying the materials retain some solvent after all the non-solvent has been removed. Alternatively, the concentration of the cellulose derivative does not exceed 15 per cent, and the solvent, or in the case of a mixture at least one constituent thereof, has a boiling point not less than that of the non-solvent of the coagulating medium or is not more volatile than the non-solvent, and removal of the coagulating medium is effected by washing or drying. The cellulose derivative may be cellulose acetate or other organic ester or ether of cellulose. The solvent may be dioxane methylene ethylene dioxide, an ester or ether of dioxane dicarbinol, diacetone alcohol, ethyl lactate, diethyl tartrate, or an ester of glycol or methyl glycol. The non-solvent may be water, alcohol, or a hydrocarbon. Salts or sugars may be added to the coagulating bath. The films may be stretched continuously with production. In an example, cellulose acetate dissolved in diacetone alcohol is extruded on to a drum immersed in ethyl alcohol containing 10 per cent of diacetone alcohol. The film obtained is dried on a steam heated cylinder and yields a transparent product. In another example, a 15 per cent solution of cellulose acetate in dioxane is extruded on to a drum immersed in an aqueous solution of dioxane. The film is dried on a heated roller and yields an opaque product. Specifications 177,868, 179,234, [both in Class 2 (ii), Cellulose &c.], 340,324, 340,325, 340,326, 340,436, 340,437, 343,062, 375,423, 378,858, 380,819, 400,589, and 401,679 are referred to.
GB2215732A 1932-08-06 1932-08-06 Improvements in films, sheets and the like and processes for their manufacture Expired GB405676A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2215732A GB405676A (en) 1932-08-06 1932-08-06 Improvements in films, sheets and the like and processes for their manufacture
FR758552D FR758552A (en) 1932-08-06 1933-07-17 Improved films, films, sheets and the like and method of making them

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2215732A GB405676A (en) 1932-08-06 1932-08-06 Improvements in films, sheets and the like and processes for their manufacture

Publications (1)

Publication Number Publication Date
GB405676A true GB405676A (en) 1934-02-06

Family

ID=10174851

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2215732A Expired GB405676A (en) 1932-08-06 1932-08-06 Improvements in films, sheets and the like and processes for their manufacture

Country Status (2)

Country Link
FR (1) FR758552A (en)
GB (1) GB405676A (en)

Also Published As

Publication number Publication date
FR758552A (en) 1934-01-19

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