GB388831A - Improvements in or relating to the production of films and sheets - Google Patents

Improvements in or relating to the production of films and sheets

Info

Publication number
GB388831A
GB388831A GB25383/31A GB2538331A GB388831A GB 388831 A GB388831 A GB 388831A GB 25383/31 A GB25383/31 A GB 25383/31A GB 2538331 A GB2538331 A GB 2538331A GB 388831 A GB388831 A GB 388831A
Authority
GB
United Kingdom
Prior art keywords
cellulose
solution
slit
supporting surface
hopper
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
GB25383/31A
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.)
WILLIAM STUART LANDES
Acordis UK Ltd
Original Assignee
WILLIAM STUART LANDES
British Celanese Ltd
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 WILLIAM STUART LANDES, British Celanese Ltd filed Critical WILLIAM STUART LANDES
Publication of GB388831A publication Critical patent/GB388831A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0016—Plasticisers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2201/00—Use of cellulose, modified cellulose or cellulose derivatives, e.g. viscose, as reinforcement
    • B29K2201/08—Cellulose derivatives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2201/00—Use of cellulose, modified cellulose or cellulose derivatives, e.g. viscose, as reinforcement
    • B29K2201/08—Cellulose derivatives
    • B29K2201/12—Cellulose acetate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2201/00—Use of cellulose, modified cellulose or cellulose derivatives, e.g. viscose, as reinforcement
    • B29K2201/08—Cellulose derivatives
    • B29K2201/18—Cellulose nitrate
    • 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
    • C08J2301/16—Esters of inorganic acids
    • C08J2301/18—Cellulose nitrate

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)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

Smooth sheet-like material is obtained by forcing a highly concentrated solution of a cellulose derivative under pressure through a slit-shaped orifice and receiving the shaped product directly on a supporting surface which may be of polished metal, glass, or baked synthetic resin. The supporting surface may be the periphery of a rotating wheel, or a moving band of metal or paper, or it may be a stationary surface. The cellulosic solution may be placed in a hopper and subjected to fluid pressure whereby it is forced through the slit, or it may be fed to the slit by means of gear pumps. The hopper may be provided with a heating jacket or coil. The solution may be extruded on to the supporting surface at an angle other than a right-angle. If desired the supporting surface may travel at a greater speed than the speed of extrusion, in order that the sheet may be stretched and reduced in thickness. In an example, a 30 per cent solution of cellulose nitrate in acetone and camphor is fed through a slit from a hopper and under a pressure of 5-75 lbs. per square inch above atmospheric pressure on to a polished nickel wheel, and the volatile solvent is evaporated, leaving a smooth sheet. Higher concentrations of cellulose derivative such as 66 per cent and over may be employed. The cellulose derivative may be cellulose acetate or other cellulose ester, or ethyl cellulose or other cellulose ether. Cellulose derivatives of low viscosity characteristics may be employed. In addition to the volatile solvent, the solution may contain a plasticizer such as camphor, triacetin, an alkyl phthalate or tartrate, or monomethyl xylene sulphonamide. The solution may also contain pigments, effect materials, stabilizers such as urea, and other ingredients. Thin sheets for wrapping foodstuffs, tobacco products and other articles, or thicker sheets for photographic, cinematographic and other purposes, may be obtained. The Specification as open to inspection under Sect. 91 comprises also the use of a doctor blade for spreading the solution of cellulose derivative upon the casting surface. This subject-matter does not appear in the Specification as accepted.
GB25383/31A 1930-09-10 1931-09-10 Improvements in or relating to the production of films and sheets Expired GB388831A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US388831XA 1930-09-10 1930-09-10

Publications (1)

Publication Number Publication Date
GB388831A true GB388831A (en) 1933-03-09

Family

ID=21902450

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25383/31A Expired GB388831A (en) 1930-09-10 1931-09-10 Improvements in or relating to the production of films and sheets

Country Status (1)

Country Link
GB (1) GB388831A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0704473A1 (en) * 1994-09-16 1996-04-03 Eastman Kodak Company Process for making cellulose triacetate photographic film base
CN109153158A (en) * 2016-05-31 2019-01-04 菲利普莫里斯生产公司 It is used to check the casting apparatus and method of the thickness of cast-sheet

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0704473A1 (en) * 1994-09-16 1996-04-03 Eastman Kodak Company Process for making cellulose triacetate photographic film base
CN109153158A (en) * 2016-05-31 2019-01-04 菲利普莫里斯生产公司 It is used to check the casting apparatus and method of the thickness of cast-sheet
CN109153158B (en) * 2016-05-31 2021-10-29 菲利普莫里斯生产公司 Casting apparatus and method to check thickness of cast sheet

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