GB439793A - Process of and apparatus for the production of foils and like planiform structures from formylcellulose - Google Patents

Process of and apparatus for the production of foils and like planiform structures from formylcellulose

Info

Publication number
GB439793A
GB439793A GB17217/35A GB1721735A GB439793A GB 439793 A GB439793 A GB 439793A GB 17217/35 A GB17217/35 A GB 17217/35A GB 1721735 A GB1721735 A GB 1721735A GB 439793 A GB439793 A GB 439793A
Authority
GB
United Kingdom
Prior art keywords
formic acid
film
foils
zinc chloride
belt
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
GB17217/35A
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.)
Dow Produktions und Vertriebs GmbH and Co oHG
Original Assignee
Wolff and Co AG
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 Wolff and Co AG filed Critical Wolff and Co AG
Publication of GB439793A publication Critical patent/GB439793A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

<PICT:0439793/IV/1> Foils and like structures are produced by pouring a formyl cellulose reaction mass containing formic acid, dehydration medium, and formyl cellulose) on to a suitable support, evaporating wholly or partially the formic acid in the mass, and then precipitating in water. If desired, plasticizers such as ethyl acetanilide, camphor, and dibutyl phthalate may be added to the formylating mass before pouring. Foils which cannot assume an electric charge are produced when a formyl cellulose containing free hydroxyl groups is employed, e.g. formyl cellulose containing 40--45 per cent of formic acid. In an example, a formyl cellulose reaction mass obtained by treating cotton linters or pulp with formic acid in the presence of zinc chloride, is ripened and de-aerated. It is then poured from a vessel 1 into a pourer 3, and the film which forms on the runner belt 6 is led over a number of heating pipes 8. A current of air enters the chamber at 9 and leaves at 10. The belt 6 carries the partially (e.g. 75 per cent) dried film through the coagulation bath 11 consisting of water and of formic acid and zinc chloride taken up from the film, and finally the film which is detached from the belt by means of a roller 14, is passed through a series of washing and plasticizing baths 18, 19, 20, and over drying rollers 21. Formic acid and zinc chloride are recovered from the coagulating bath which preferably is caused to move in counter-current direction to the film.
GB17217/35A 1934-06-16 1935-06-14 Process of and apparatus for the production of foils and like planiform structures from formylcellulose Expired GB439793A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE439793X 1934-06-16

Publications (1)

Publication Number Publication Date
GB439793A true GB439793A (en) 1935-12-13

Family

ID=6507354

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17217/35A Expired GB439793A (en) 1934-06-16 1935-06-14 Process of and apparatus for the production of foils and like planiform structures from formylcellulose

Country Status (2)

Country Link
FR (1) FR791362A (en)
GB (1) GB439793A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10431795B2 (en) 2015-09-30 2019-10-01 Sumitomo Chemical Company, Limited Film production method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE748727C (en) * 1936-05-11 1944-11-09 Process for the production of molded articles from cellulose formylation mixtures

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10431795B2 (en) 2015-09-30 2019-10-01 Sumitomo Chemical Company, Limited Film production method

Also Published As

Publication number Publication date
FR791362A (en) 1935-12-10

Similar Documents

Publication Publication Date Title
ES266929U (en) Polyamide membrane suitable for ultrafiltration and process for producing some.
ES263664A1 (en) Manufacture of shaped objects of acrylonitrile polymer by wet spinning
GB439793A (en) Process of and apparatus for the production of foils and like planiform structures from formylcellulose
GB350902A (en) A process for improving artificial fibres made from viscose
US2236648A (en) Process for the production of foils or films of cellulose triacetate
US2253157A (en) Process for producing cellulose sheets and films
US2203596A (en) Process for the manufacture of transparent foils, films, and threads of cellulose formate
FR759815A (en) Process for manufacturing particularly thin and transparent cellulose hydrate sheets
US1755657A (en) Caustic-soda solution of cellulose
ES432369A1 (en) Process for spinning acrylic polymers
GB816841A (en) Method for preparing acrylonitrile containing fibres
US1709513A (en) Process of forming cellulose products
GB525678A (en) Improvements in and relating to the manufacture of flexible sheet material
GB744278A (en) Process for the manufacture of threads from solutions of polyacrylonitrile in mineral acids
GB858533A (en) Improvements in the manufacture of cellulose triacetate filamentary products
US1807036A (en) Treatment of cellulose solutions
GB368664A (en) Process for the production of foils, strips and other pellicular structures from aqueous cellulose solutions
SU20585A1 (en) The method of obtaining resinous products
US1546902A (en) Process of recovering acetic acid from cellulose-acetate solutions containing acetic acid
GB406337A (en) Improvements in the manufacture of films, sheets and the like
GB780375A (en) Production of polyacrylonitrile fibres having a scaly integument
DE522575C (en) Process for the production of cellulose ethers
GB530889A (en) Improvements in or relating to the manufacture of transparent films
GB481565A (en) Improvements in the manufacture of artificial threads
SU106378A1 (en) The method of obtaining 4-amino-5-formylamino-uracil