GB1414652A - Synthetic polymer filaments - Google Patents

Synthetic polymer filaments

Info

Publication number
GB1414652A
GB1414652A GB2790675A GB2790675A GB1414652A GB 1414652 A GB1414652 A GB 1414652A GB 2790675 A GB2790675 A GB 2790675A GB 2790675 A GB2790675 A GB 2790675A GB 1414652 A GB1414652 A GB 1414652A
Authority
GB
United Kingdom
Prior art keywords
filaments
filament
voids
core
acrylonitrile
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
GB2790675A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and 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
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB1414652A publication Critical patent/GB1414652A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/18—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
    • 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
    • B29C48/92—Measuring, controlling or regulating
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/28—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/38—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds comprising unsaturated nitriles as the major constituent
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92514—Pressure
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895—Barrel or housing
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Artificial Filaments (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Multicomponent Fibers (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

1414652 Acrylonitrile polymer filaments E I DU PONT DE NEMOURS & CO 16 Oct 1972 [14 Oct 1971] 27906/75 Divided out of 1414651 Heading B5B [Also in Division C3] Filaments of acrylonitrile polymers containing 80-100% by weight acrylonitrile units and 0-20% by weight of units of one or more comonomers have a sheath extending inward from the surface of the filament with a thickness of from 5 to 50% of the distance from the outer surface of the filament to the central axis of the filament, the sheath having a positive density gradient wherein the highest density is at or near the surface of the filament and having substantially no optical voids. The exemplified comonomer units are derived from one or more of methyl acrylate, sodium styrene sulphonate, styrene, ethylene, 2-methyl-5-vinylpyridine and vinyl acetate. The filaments are produced by extruding a composition containing the acrylonitrile polymer and water, wherein the water is present, completely or partially, in the form of a hydrate with the nitrile groups of the polymer, through an orifice at a temperature of from 25‹ C. below to 10‹ C. above the temperature of hydration of the acrylonitrile polymer). (The hydrated polymer compositions are described and claimed in Specification 1,414,651. The extruded filaments comprise a core containing voids having lateral diameters of from 0À05 to 1 micron in a concentration of between 10<SP>5</SP> and 10<SP>7</SP>/mm.<SP>2</SP> of core cross-section. When the filaments are drawn, e.g. to 200% or more of their as-spun length, the sheath develops discrete, longitudinal striations on the outer surface or skin and the voids in the core are elongated and reduced in diameter, the drawn filaments thereby developing a positive form birefringence. If the filaments are heated, the core voids can be reduced to less than 0À05 micron in diameter and the birefringence disappears.
GB2790675A 1971-10-14 1972-10-16 Synthetic polymer filaments Expired GB1414652A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18920271A 1971-10-14 1971-10-14

Publications (1)

Publication Number Publication Date
GB1414652A true GB1414652A (en) 1975-11-19

Family

ID=22696359

Family Applications (2)

Application Number Title Priority Date Filing Date
GB4764672A Expired GB1414651A (en) 1971-10-14 1972-10-16 Acrylonitrile polymer compositions
GB2790675A Expired GB1414652A (en) 1971-10-14 1972-10-16 Synthetic polymer filaments

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB4764672A Expired GB1414651A (en) 1971-10-14 1972-10-16 Acrylonitrile polymer compositions

Country Status (21)

Country Link
JP (1) JPS5442023B2 (en)
AR (1) AR198797A1 (en)
AU (1) AU4775772A (en)
BE (1) BE790107A (en)
BR (1) BR7207167D0 (en)
CA (1) CA1034328A (en)
CH (1) CH540306A (en)
DE (1) DE2248244B2 (en)
ES (1) ES407614A1 (en)
FR (1) FR2156337B1 (en)
GB (2) GB1414651A (en)
IE (2) IE36757B1 (en)
IL (1) IL40560A0 (en)
IN (1) IN139404B (en)
LU (1) LU66301A1 (en)
NL (1) NL164910C (en)
OA (1) OA04203A (en)
PL (1) PL74841B1 (en)
RO (1) RO86220B (en)
TR (1) TR17873A (en)
ZA (1) ZA727281B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL43990A (en) * 1973-02-05 1976-08-31 American Cyanamid Co Method of spining fiber using a fusion-melt polymer composition
US3873508A (en) * 1973-12-27 1975-03-25 Du Pont Preparation of acrylonitrile polymer
US4238442A (en) * 1978-12-29 1980-12-09 E. I. Du Pont De Nemours And Company Process for melt spinning acrylonitrile polymer hydrates
DE19959532C1 (en) * 1999-12-10 2001-10-04 Seitz Schenk Filtersystems Gmb Method and device for the production of filtration-active fibers
GB2370248A (en) * 1999-12-10 2002-06-26 Seitzschenk Filtersystems Gmbh Production of filtration-active fibres

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2585499A (en) * 1948-07-29 1952-02-12 Du Pont Production of shaped articles from acrylonitrile polymers
US2585444A (en) * 1948-07-29 1952-02-12 Du Pont Preparation of shaped articles from acrylonitrile polymers
US3402231A (en) * 1964-05-21 1968-09-17 Monsanto Co Process for preparing synthetic fibers for paper products
US3388202A (en) * 1965-09-27 1968-06-11 Monsanto Co Method for melting acrylonitrile polymers and copolymers
US3354856A (en) * 1966-03-16 1967-11-28 Joseph R Annibale Submerged object lifting device
US3896204A (en) * 1972-10-02 1975-07-22 Du Pont Melt-extrusion of acrylonitrile polymers into filaments
US3873508A (en) * 1973-12-27 1975-03-25 Du Pont Preparation of acrylonitrile polymer

Also Published As

Publication number Publication date
AR198797A1 (en) 1974-07-24
NL164910C (en) 1981-02-16
FR2156337B1 (en) 1977-04-01
PL74841B1 (en) 1974-12-31
NL164910B (en) 1980-09-15
JPS4849839A (en) 1973-07-13
CH540306A (en) 1973-08-15
IN139404B (en) 1976-06-12
IE36757L (en) 1973-04-14
DE2248244B2 (en) 1978-12-14
JPS5442023B2 (en) 1979-12-12
TR17873A (en) 1976-09-01
ES407614A1 (en) 1975-10-01
IE36757B1 (en) 1977-02-16
RO86220A (en) 1985-03-15
DE2248244A1 (en) 1973-04-19
OA04203A (en) 1979-12-31
BE790107A (en) 1973-04-13
CA1034328A (en) 1978-07-11
NL7213907A (en) 1973-04-17
IE36758B1 (en) 1977-02-16
IL40560A0 (en) 1972-12-29
ZA727281B (en) 1973-08-29
LU66301A1 (en) 1973-01-23
RO86220B (en) 1985-03-31
BR7207167D0 (en) 1973-07-26
FR2156337A1 (en) 1973-05-25
AU4775772A (en) 1974-04-26
GB1414651A (en) 1975-11-19

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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