GB1188324A - Process for preparing Non-Woven Fibrous Products from Gel Fibers - Google Patents

Process for preparing Non-Woven Fibrous Products from Gel Fibers

Info

Publication number
GB1188324A
GB1188324A GB4702469A GB4702469A GB1188324A GB 1188324 A GB1188324 A GB 1188324A GB 4702469 A GB4702469 A GB 4702469A GB 4702469 A GB4702469 A GB 4702469A GB 1188324 A GB1188324 A GB 1188324A
Authority
GB
United Kingdom
Prior art keywords
web
fibres
restraint
gel
restraining
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
GB4702469A
Inventor
Thomas Cecil Spence
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
Application filed by Dow Chemical Co filed Critical Dow Chemical Co
Priority to GB4702469A priority Critical patent/GB1188324A/en
Publication of GB1188324A publication Critical patent/GB1188324A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H5/00—Special paper or cardboard not otherwise provided for
    • D21H5/12—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials
    • D21H5/20—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials of organic non-cellulosic fibres too short for spinning, with or without cellulose fibres
    • D21H5/205—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials of organic non-cellulosic fibres too short for spinning, with or without cellulose fibres acrylic fibres
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/10—Organic non-cellulose fibres
    • D21H13/12—Organic non-cellulose fibres from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H13/18—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylonitriles

Abstract

1,188,324. Papermaking; non-woven fabric. DOW CHEMICAL CO. 24 Feb., 1967, No. 47024/69. Divided out of 1,188,322. Headings D1R, D2A and D2B. A dry non-woven fibrous sheet is made from a web of self-bonding, non-fibrillated gel fibres (defined as in the parent specification) of thermoplastic fibre-forming polymers of acrylonitrile, by drying it under conditions that cause the gel fibres to collapse while restraining shrinkage of the web. The restraint may be applied by tensioning the web in its plane or by a compressive force applied to its face, e.g. by pressing it between two belts moving with the web, at least one of the belts being foraminous to allow vapours to escape. The restraint may be applied throughout the drying period, or only in its earlier part (when most of the shrinkage would otherwise take place), or intermittently, e.g. by passing the web continuously over a series of dryer rolls, wrapping it alternately clockwise and counterclockwise, while restraining it to constant length. The dried web may subsequently be annealed at a temperature at least 30‹C above the glass-transition temperature of the fibres. The web may be formed by a scattering mechanism, distribution by a stream of air or water, or deposition by filtering from a liquid. Staple fibres are preferably formed into a web by papermaking technique, continuous filaments also from suspension in water, or by collecting the filaments side-by-side as in a tow, but preferably with a little cross-lay. The rate of drainage of aqueous slurries may be controlled by the process of Specification 1,188,323. The gel fibres may be toughened before sheet-formation by subjecting them while free of restraint to a hot aqueous medium, but they must then be cooled before subjecting them to stress.
GB4702469A 1967-02-24 1967-02-24 Process for preparing Non-Woven Fibrous Products from Gel Fibers Expired GB1188324A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4702469A GB1188324A (en) 1967-02-24 1967-02-24 Process for preparing Non-Woven Fibrous Products from Gel Fibers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4702469A GB1188324A (en) 1967-02-24 1967-02-24 Process for preparing Non-Woven Fibrous Products from Gel Fibers

Publications (1)

Publication Number Publication Date
GB1188324A true GB1188324A (en) 1970-04-15

Family

ID=10443432

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4702469A Expired GB1188324A (en) 1967-02-24 1967-02-24 Process for preparing Non-Woven Fibrous Products from Gel Fibers

Country Status (1)

Country Link
GB (1) GB1188324A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees