GB833126A - Process for preparing thermoplastic tapes of varied cross-sections - Google Patents

Process for preparing thermoplastic tapes of varied cross-sections

Info

Publication number
GB833126A
GB833126A GB206458A GB206458A GB833126A GB 833126 A GB833126 A GB 833126A GB 206458 A GB206458 A GB 206458A GB 206458 A GB206458 A GB 206458A GB 833126 A GB833126 A GB 833126A
Authority
GB
United Kingdom
Prior art keywords
tape
coagulum
temperature
fusion
rolls
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
GB206458A
Inventor
Lloyd Edward Lefevre
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 Chemical Co
Original Assignee
Dow Chemical Co
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
Priority to US647645A priority Critical patent/US2960725A/en
Application filed by Dow Chemical Co filed Critical Dow Chemical Co
Priority to GB206458A priority patent/GB833126A/en
Priority to DED27371A priority patent/DE1125147B/en
Priority to FR1203523D priority patent/FR1203523A/en
Priority to NL224730A priority patent/NL107093C/xx
Publication of GB833126A publication Critical patent/GB833126A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/42—Formation of filaments, threads, or the like by cutting films into narrow ribbons or filaments or by fibrillation of films or filaments
    • D01D5/426—Formation of filaments, threads, or the like by cutting films into narrow ribbons or filaments or by fibrillation of films or filaments by cutting films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B29B13/023—Half-products, e.g. films, plates
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/34—Rim rolling
    • 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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/20—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored
    • 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
    • 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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/26—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a solid phase from a macromolecular composition or article, e.g. leaching out
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Textile Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

<PICT:0833126/IV (a)/1> Thermoplastic tapes of various cross-sections are made by a process comprising, as essential steps in sequence, the localized coagulation of a latex of a normally crystalline vinylidene chloride copolymer to form a flat, continuous, coherent coagulum having a porosity gradient from one surface to the other, washing the coagulum free of coagulant, cutting the coagulum, if necessary, to form a tape, drying the tape below its fusion temperature and finally exposing only the more porous surface of the tape to radiant heat at a temperature between the fusion temperature and the decomposition temperature of the copolymer to fuse the coagulum and simultaneously to roll the edges of the tape without causing fusion of the layers. The tape may be from 1/16 to 1/2 inch wide, and may be made by depositing on a non-porous base wetted with a coagulant solution a latex of a copolymer comprising 92-99% by weight of vinylidene chloride and 8-1% by weight of acrylonitrile. The more porous side (the underside) only of the tape may be exposed to radiant heat at from 175-300 DEG C., preferably for not more than a few seconds. As shown, a tape 10 obtained as described above, passes through snubbing feed-rolls 11, the more porous surface being uppermost, thence around the idler roll 12 and preheat drum 13, to a supercooling roll 14, and is finally taken up by snubbing take-up rolls 15, tape tension being adjusted by the relative speeds of rolls 11 and 15. A radiant preheater 16 may also be fitted above drum 13. Shortly after leaving the drum, the tape is heated by a second radiant heater 17 and this causes fusion and shaping of the tape to the form of Figs. 2-6, the cross-section progressing from that of Fig. 2 to that of Fig. 6 as the tape temperature is raised.
GB206458A 1957-03-21 1958-01-21 Process for preparing thermoplastic tapes of varied cross-sections Expired GB833126A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US647645A US2960725A (en) 1957-03-21 1957-03-21 Process for preparing thermoplastic tapes of varied cross-sections
GB206458A GB833126A (en) 1958-01-21 1958-01-21 Process for preparing thermoplastic tapes of varied cross-sections
DED27371A DE1125147B (en) 1958-01-21 1958-02-04 Continuous process for the production of film-like thermoplastic strips with different cross-sections
FR1203523D FR1203523A (en) 1957-03-21 1958-02-05 Process for the preparation of thermoplastic tapes of various cross sections
NL224730A NL107093C (en) 1958-01-21 1958-02-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB206458A GB833126A (en) 1958-01-21 1958-01-21 Process for preparing thermoplastic tapes of varied cross-sections

Publications (1)

Publication Number Publication Date
GB833126A true GB833126A (en) 1960-04-21

Family

ID=9732960

Family Applications (1)

Application Number Title Priority Date Filing Date
GB206458A Expired GB833126A (en) 1957-03-21 1958-01-21 Process for preparing thermoplastic tapes of varied cross-sections

Country Status (2)

Country Link
GB (1) GB833126A (en)
NL (1) NL107093C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10442620B2 (en) 2012-09-04 2019-10-15 Maricap Oy Apparatus for processing material, and waste container/separating device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10442620B2 (en) 2012-09-04 2019-10-15 Maricap Oy Apparatus for processing material, and waste container/separating device
US11352206B2 (en) 2012-09-04 2022-06-07 Maricap Oy Apparatus for processing material, and waste container/separating device

Also Published As

Publication number Publication date
NL107093C (en) 1964-01-15

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