GB1279299A - Production of films and multifilamentary yarns therefrom - Google Patents

Production of films and multifilamentary yarns therefrom

Info

Publication number
GB1279299A
GB1279299A GB32758/69A GB3275869A GB1279299A GB 1279299 A GB1279299 A GB 1279299A GB 32758/69 A GB32758/69 A GB 32758/69A GB 3275869 A GB3275869 A GB 3275869A GB 1279299 A GB1279299 A GB 1279299A
Authority
GB
United Kingdom
Prior art keywords
film
roller
nip
grooves
tapes
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
GB32758/69A
Inventor
James Dow
Ronald Lloyd
Albert George Patchell
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.)
Smith and Nephew Polyfabrik Ltd
Original Assignee
Smith and Nephew Polyfabrik 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 Smith and Nephew Polyfabrik Ltd filed Critical Smith and Nephew Polyfabrik Ltd
Priority to GB32758/69A priority Critical patent/GB1279299A/en
Priority to CA086,174A priority patent/CA961613A/en
Priority to ZA704257A priority patent/ZA704257B/en
Priority to DK332270AA priority patent/DK138804B/en
Priority to FR7023710A priority patent/FR2051355A5/fr
Priority to NL707009515A priority patent/NL146544B/en
Priority to SE08869/70A priority patent/SE360037B/xx
Priority to DE19702031686 priority patent/DE2031686C3/en
Priority to ES381231A priority patent/ES381231A1/en
Publication of GB1279299A publication Critical patent/GB1279299A/en
Priority to US314064A priority patent/US3919377A/en
Priority to ES1972186792U priority patent/ES186792Y/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
    • B29D99/00—Subject matter not provided for in other groups of this subclass
    • B29D99/0078—Producing filamentary materials
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • 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
    • B29C48/05—Filamentary, e.g. strands
    • 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
    • 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
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
    • 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
    • D01D5/423—Formation of filaments, threads, or the like by cutting films into narrow ribbons or filaments or by fibrillation of films or filaments by fibrillation of films or filaments
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • 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
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/731—Filamentary material, i.e. comprised of a single element, e.g. filaments, strands, threads, fibres

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Laminated Bodies (AREA)

Abstract

1279299 Films; film fibrillation SMITH & NEPHEW POLYFABRIK Ltd 19 June 1970 [27 June 1969] 32758/69 Heading B5B Films consisting of a synthetic organic thermoplastic polymeric material which when in film form can be drawn without breaking at a temperature between its second order transition temperature and its melting point are produced by melt extruding the material through a slot die and feeding the molten film thereby formed through nip means between co-operating members at least one of which is a positively driven roller maintained at a temperature below the melting point of the polymer, the nip means being such as to produce shear in the film between the two film surfaces and including means for forming grooves on at least one surface of the film, particularly continuous longitudinal grooves. In the embodiment shown in Fig. 1, a molten film 1 of the polymer is melt extruded from the slot die 2 and passes through the nip between rollers 3 and 4 and thereafter through the nip between driven rollers 5 and 6. Roller 4 is a relatively cool roller maintained at a temperature below the melting point of the polymer, e.g. at 70‹ C., and is provided with closely spaced parallel circumferential annular grooves to form corresponding longitudinal parallel grooves on one surface of the film. Roller 3 is a smooth heated roller, e.g. at 170‹ C., and rollers 3 and 4 are driven at different peripheral speeds to produce shear between the two surfaces of the film, e.g. the peripheral speed of roller 3 may be 10% below that of roller 4. Rollers 5 and 6 are driven at the same peripheral speed which is preferably a considerable multiple of the speed of roller 4 so that the film is stretched longitudinally at a stretch ratio sufficiently high to cause it to fibrillate or to be readily fibrillatable by subsequent conventional fibrillation treatment. The grooved film may be longitudinally slit to form a number of grooved tapes by known means, especially while it is still in contact with the roller 4. In the embodiment shown in Fig. 2, the molten film 1 extruded from the slot die 2 passes through the nip between grooved roller 7 maintained at 90‹ C. and doctor blade 8 supported on backing plate 9. Blade 8 is a flexible strip of metal having a sharp edge where it contacts the film in a trailing disposition. The blade may be provided with heating or cooling means. In the embodiment shown in Fig. 3, the doctor blade 8 shown in Fig. 2 is replaced by a needle comb 11 having 100 needle 12 per inch and a length similar to that of roller 13. Roller 13 in this embodiment has a smooth peripheral surface. It is maintained at a temperature below the melting point of the polymer. In an example, the apparatus shown in Fig. 2 is used to produce a polypropylene film web 112 microns thick having a thickness of 10 microns at the grooves, the web is slit into tapes having 25 longitudinal grooves each and the tapes are stretched at a stretch ratio of 5:1 to 6:1 and fibrillated by passing the tapes through an air Venturi passage to form multi-filament yarns.
GB32758/69A 1969-06-27 1969-06-27 Production of films and multifilamentary yarns therefrom Expired GB1279299A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
GB32758/69A GB1279299A (en) 1969-06-27 1969-06-27 Production of films and multifilamentary yarns therefrom
CA086,174A CA961613A (en) 1969-06-27 1970-06-22 Production of tapes and fibrous materials
ZA704257A ZA704257B (en) 1969-06-27 1970-06-22 Production of tapes and fibrous materials
NL707009515A NL146544B (en) 1969-06-27 1970-06-26 PROCESS FOR MANUFACTURE OF A YARN AND YARN MADE UNDER APPLICATION OF THE PROCESS.
FR7023710A FR2051355A5 (en) 1969-06-27 1970-06-26
DK332270AA DK138804B (en) 1969-06-27 1970-06-26 Method for producing multifilament yarn by forming a profiled film which is stretched and split.
SE08869/70A SE360037B (en) 1969-06-27 1970-06-26
DE19702031686 DE2031686C3 (en) 1969-06-27 1970-06-26 Method and apparatus for making yarns or fibers from a web of cold drawable polymer
ES381231A ES381231A1 (en) 1969-06-27 1970-06-27 Production of films and multifilamentary yarns therefrom
US314064A US3919377A (en) 1969-06-27 1972-12-11 Production of tapes and fibrous materials
ES1972186792U ES186792Y (en) 1969-06-27 1972-12-14 APPARATUS TO PRODUCE A LARGE AREA OF COLD STRETCHABLE THERMAL-PLASTIC POLYMER.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB32758/69A GB1279299A (en) 1969-06-27 1969-06-27 Production of films and multifilamentary yarns therefrom

Publications (1)

Publication Number Publication Date
GB1279299A true GB1279299A (en) 1972-06-28

Family

ID=10343573

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32758/69A Expired GB1279299A (en) 1969-06-27 1969-06-27 Production of films and multifilamentary yarns therefrom

Country Status (8)

Country Link
CA (1) CA961613A (en)
DK (1) DK138804B (en)
ES (2) ES381231A1 (en)
FR (1) FR2051355A5 (en)
GB (1) GB1279299A (en)
NL (1) NL146544B (en)
SE (1) SE360037B (en)
ZA (1) ZA704257B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004080699A2 (en) * 2003-03-06 2004-09-23 3M Innovative Properties Company Method of making retroreflective sheeting and slot die apparatus
CN112046027A (en) * 2020-09-28 2020-12-08 深圳市全正科技有限公司 Medium-large-size FPC (flexible printed circuit) integrated cutting device and process thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107187013A (en) * 2017-07-18 2017-09-22 江西盛汇光学科技协同创新有限公司 A kind of multi-functional die mould compounding machine group and the method for making microprism film

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004080699A2 (en) * 2003-03-06 2004-09-23 3M Innovative Properties Company Method of making retroreflective sheeting and slot die apparatus
WO2004080699A3 (en) * 2003-03-06 2005-02-10 3M Innovative Properties Co Method of making retroreflective sheeting and slot die apparatus
US7364421B2 (en) 2003-03-06 2008-04-29 3M Innovative Properties Comapny Method of making retroreflective sheeting and slot die apparatus
US7410604B2 (en) 2003-03-06 2008-08-12 3M Innovative Properties Company Method of making retroreflective sheeting and slot die apparatus
CN112046027A (en) * 2020-09-28 2020-12-08 深圳市全正科技有限公司 Medium-large-size FPC (flexible printed circuit) integrated cutting device and process thereof
CN112046027B (en) * 2020-09-28 2024-06-04 深圳市全正科技有限公司 Medium-and-large-size FPC one-piece cutting device and technology thereof

Also Published As

Publication number Publication date
ES186792U (en) 1973-11-16
NL146544B (en) 1975-07-15
NL7009515A (en) 1970-12-29
ES186792Y (en) 1974-08-01
SE360037B (en) 1973-09-17
ES381231A1 (en) 1973-04-01
DE2031686B2 (en) 1977-01-20
ZA704257B (en) 1971-03-31
FR2051355A5 (en) 1971-04-02
DK138804C (en) 1979-04-17
DE2031686A1 (en) 1971-04-08
DK138804B (en) 1978-10-30
CA961613A (en) 1975-01-28

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years