GB539429A - Improvements in casting sheets of film forming materials - Google Patents

Improvements in casting sheets of film forming materials

Info

Publication number
GB539429A
GB539429A GB4187/40A GB418740A GB539429A GB 539429 A GB539429 A GB 539429A GB 4187/40 A GB4187/40 A GB 4187/40A GB 418740 A GB418740 A GB 418740A GB 539429 A GB539429 A GB 539429A
Authority
GB
United Kingdom
Prior art keywords
solution
built
support
solvent
sheets
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
GB4187/40A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB4187/40A priority Critical patent/GB539429A/en
Publication of GB539429A publication Critical patent/GB539429A/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
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/91—Heating, e.g. for cross linking

Abstract

539,429. Casting sheets of film-forming materials. ROONEY, J. H., HAWTIN, P. R., and MACPHERSON, D. C. March 6, 1940, No. 4187. [Class 2 (ii)] Sheets at least one-hundredth of an inch thick are built up on a support travelling through a heated evaporative atmosphere, by the successive deposition of layers of a solution of a film-forming substance in a volatile solvent. A substantial part of the solvent initially present in each layer is removed by evaporation before the deposition of the next layer, and the bulk of the solvent is removed after the built-up sheet has been stripped from the support. The travelling support is preferably a continuous band of nickel or stainless steel having a highly polished surface. The solution may be a 20 per cent-35 per cent solution of cellulose acetate in acetone containing the desired content of plasticizer, and it may be made up with an excess of acetone which is boiled off under reduced pressure immediately before the solution is used. The temperature of the evaporative atmosphere and the speed of the band are reduced as the thickness of the built-up sheet increases. Specifications 396,723 and 538,024 are referred to.
GB4187/40A 1940-03-06 1940-03-06 Improvements in casting sheets of film forming materials Expired GB539429A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4187/40A GB539429A (en) 1940-03-06 1940-03-06 Improvements in casting sheets of film forming materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4187/40A GB539429A (en) 1940-03-06 1940-03-06 Improvements in casting sheets of film forming materials

Publications (1)

Publication Number Publication Date
GB539429A true GB539429A (en) 1941-09-10

Family

ID=9772344

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4187/40A Expired GB539429A (en) 1940-03-06 1940-03-06 Improvements in casting sheets of film forming materials

Country Status (1)

Country Link
GB (1) GB539429A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5219510A (en) * 1990-09-26 1993-06-15 Eastman Kodak Company Method of manufacture of cellulose ester film

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5219510A (en) * 1990-09-26 1993-06-15 Eastman Kodak Company Method of manufacture of cellulose ester film

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