GB605105A - The production of perforated sheets of thermoplastic resin compositions - Google Patents

The production of perforated sheets of thermoplastic resin compositions

Info

Publication number
GB605105A
GB605105A GB33890/45A GB3389045A GB605105A GB 605105 A GB605105 A GB 605105A GB 33890/45 A GB33890/45 A GB 33890/45A GB 3389045 A GB3389045 A GB 3389045A GB 605105 A GB605105 A GB 605105A
Authority
GB
United Kingdom
Prior art keywords
grooves
dispersion
roller
polyvinyl
perforated
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
GB33890/45A
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB33890/45A priority Critical patent/GB605105A/en
Publication of GB605105A publication Critical patent/GB605105A/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
    • B29C48/918—Thermal treatment of the stream of extruded material, e.g. cooling characterized by differential heating or cooling
    • 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
    • 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
    • B29C48/914—Cooling of flat articles, e.g. using specially adapted supporting means cooling drums
    • 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
    • B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
    • B29C48/9155—Pressure rollers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

<PICT:0605105/IV(a)/1> A perforated or reticular film or sheet is obtained by covering, with a dispersion of a finely powdered thermoplastic polyvinyl resin in a practically non-volatile plasticiser in which the resin dissolves only very slowly or not at all at ordinary temperatures, an engraved metal surface in which are grooves each of which at a number of places meets or intersects other grooves, removing from the surface the dispersion which has not collected in the grooves, gelatinizing by heat the dispersion which has collected in the grooves, and removing the gelatinized material from the grooves when it has been cooled sufficiently for it not to adhere to the metal. The polyvinyl resin dispersion is preferably pressed well into the grooves by means of a spreader bar or cylinder. The engraved metal surface may be polished and it may be coated with a film separating aid, such as a high melting point grease, aluminium or zinc stearate, a glazing material such as sodium silicate, or a detergent. The grooves should be free from undercuts to avoid difficulty in stripping the perforated sheet. The polyvinyl compound may be a polyvinyl ester, polyvinyl chloride, an interpolymer of vinyl chloride and a vinyl organic ester or of vinyl chloride and an acrylic or substituted acrylic ester, or a polymer of an acrylic or substituted acrylic ester. The non-solvent plasticizer may be dibutyl phthalate, tricresyl phosphate, dihexyl phthalate, and dioctyl phthalate. Heating of the engraved surface may be obtained by means of hot fluids, infra red heating lamps, or induction heating means. The perforated sheets may be used as curtains, fishing nets, filters and strainers, nets for protecting plants and trees, fancy wrappings, scrim packaging for meat in cold storage, and in the production of lamp-shades and uppers for shoes. As shown, a dispersion of polyvinyl resin 2 is fed on to a cold portion of roller 1 from a tray 3 and is carried past a stationary roller 4 which forces it well into the grooves of roller 1. A doctor knife 5 removes any dispersion which is not in the grooves. Heated rollers 6 contact the surface of the hollow roller 1 and supply heat for the gelatinization of the dispersion in the grooves. A flexible fibrous backing material 10 may be fed on to the surface of the roller 1. Cooled rollers 7 contact roller 1 and cool the perforated resin sheet sufficiently for it to be easily stripped by the cooled roller 8. Specifications 500,298 and 566,388 are referred to.
GB33890/45A 1945-12-14 1945-12-14 The production of perforated sheets of thermoplastic resin compositions Expired GB605105A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB33890/45A GB605105A (en) 1945-12-14 1945-12-14 The production of perforated sheets of thermoplastic resin compositions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB33890/45A GB605105A (en) 1945-12-14 1945-12-14 The production of perforated sheets of thermoplastic resin compositions

Publications (1)

Publication Number Publication Date
GB605105A true GB605105A (en) 1948-07-15

Family

ID=10358769

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33890/45A Expired GB605105A (en) 1945-12-14 1945-12-14 The production of perforated sheets of thermoplastic resin compositions

Country Status (1)

Country Link
GB (1) GB605105A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1238779A2 (en) * 1996-02-09 2002-09-11 Modern Machinery Co., Ltd. Thin sheet forming roll, sheet forming machine, and sheet forming method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1238779A2 (en) * 1996-02-09 2002-09-11 Modern Machinery Co., Ltd. Thin sheet forming roll, sheet forming machine, and sheet forming method
EP1238779A3 (en) * 1996-02-09 2002-10-30 Modern Machinery Co., Ltd. Thin sheet forming roll, sheet forming machine, and sheet forming method

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