GB1469623A - Hollow pva fibres - Google Patents

Hollow pva fibres

Info

Publication number
GB1469623A
GB1469623A GB1169275A GB1169275A GB1469623A GB 1469623 A GB1469623 A GB 1469623A GB 1169275 A GB1169275 A GB 1169275A GB 1169275 A GB1169275 A GB 1169275A GB 1469623 A GB1469623 A GB 1469623A
Authority
GB
United Kingdom
Prior art keywords
pva
fibre
fibres
coagulated
hollow
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
GB1169275A
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.)
Kuraray Co Ltd
Original Assignee
Kuraray Co 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 Kuraray Co Ltd filed Critical Kuraray Co Ltd
Publication of GB1469623A publication Critical patent/GB1469623A/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
    • D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/08—Hollow fibre membranes
    • 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
    • D01D5/06—Wet spinning methods
    • 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
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/08—Addition of substances to the spinning solution or to the melt for forming hollow filaments
    • 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
    • D01F6/14—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 alcohols, e.g. polyvinyl alcohol, or of their acetals or ketals

Abstract

1469623 Hollow PVA fibres KURARAY CO Ltd 20 March 1975 [25 March 1974] 11692/75 Heading B5B Hollow fibres of polyvinyl alcohol (PVA) containing 0À001-5À0% based on PVA or its derivative, of boric acid or borate and having one hollow portion continuous in the direction of the fibre axis per cross-section of the fibre with a void content of 25-80% are formed by spinning an aqueous solution of the PVA or its derivative containing 0À2-5À0% PVA or its derivative into an alkaline dehydrating salt bath containing at least 0À1 mole/litre of alkali metal carbonate salt, drawing the coagulated fibre under conditions that will satisfy the following formula and (where #n s is the double reactive index of the surface layer of the coagulated fibre, #n c is the double refractive index of the central portion of the coagulated fibre, X is the parameter of the distance from the centre in the coagulated fibre and is in the range 0 to 1, the point X=0 indicating the centre and the point X=1 indicating the surface and #n x is the double refractive index of the coagulated fibre at the point where the distance from the centre is X) and treating the fibres with an acid. The fibres may be heattreated after drying or may be subjected to chemical treatment.
GB1169275A 1974-03-25 1975-03-20 Hollow pva fibres Expired GB1469623A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP49033691A JPS50123926A (en) 1974-03-25 1974-03-25

Publications (1)

Publication Number Publication Date
GB1469623A true GB1469623A (en) 1977-04-06

Family

ID=12393434

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1169275A Expired GB1469623A (en) 1974-03-25 1975-03-20 Hollow pva fibres

Country Status (4)

Country Link
JP (1) JPS50123926A (en)
DE (1) DE2511827A1 (en)
FR (1) FR2265879B1 (en)
GB (1) GB1469623A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0532037A1 (en) * 1991-09-13 1993-03-17 Mizu Systems, Incorporated Tubing and hollow fibers comprising non-crosslinked polyvinyl alcohol hydrogels and method for preparing same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8915974D0 (en) * 1989-07-12 1989-08-31 Gore W L & Ass Uk Hydrophilic semi-permeable ptfe membranes and their manufacture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0532037A1 (en) * 1991-09-13 1993-03-17 Mizu Systems, Incorporated Tubing and hollow fibers comprising non-crosslinked polyvinyl alcohol hydrogels and method for preparing same

Also Published As

Publication number Publication date
FR2265879A1 (en) 1975-10-24
FR2265879B1 (en) 1977-11-25
DE2511827A1 (en) 1975-10-02
JPS50123926A (en) 1975-09-29

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Legal Events

Date Code Title Description
PS Patent sealed
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee