GB1123617A - Improvements in and relating to the manufacture of filter elements - Google Patents

Improvements in and relating to the manufacture of filter elements

Info

Publication number
GB1123617A
GB1123617A GB5072664A GB5072664A GB1123617A GB 1123617 A GB1123617 A GB 1123617A GB 5072664 A GB5072664 A GB 5072664A GB 5072664 A GB5072664 A GB 5072664A GB 1123617 A GB1123617 A GB 1123617A
Authority
GB
United Kingdom
Prior art keywords
water
salt
cellulose
rod
viscose
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
GB5072664A
Inventor
Peter Alan Stevenson
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.)
Akzo Nobel UK PLC
Original Assignee
Courtaulds PLC
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 Courtaulds PLC filed Critical Courtaulds PLC
Priority to GB5072664A priority Critical patent/GB1123617A/en
Priority to NL6516076A priority patent/NL6516076A/xx
Priority to FR42206A priority patent/FR1459588A/en
Publication of GB1123617A publication Critical patent/GB1123617A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
    • A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives
    • 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
    • D01D5/247—Discontinuous hollow structure or microporous structure

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Abstract

Cellular rods of regenerated cellulose are produced by forming a mixture of (a) a viscose having a ball-fall viscosity of at least 150 seconds and a salt point of at least 15; (b) a water-soluble salt which forms an alkaline solution in water, of average particle diameter less than 600 microns, the ratio of salt to viscose being at least 3:1 by weight; (c) at least 80% by weight of the cellulose in the viscose of a water-insoluble particulate filler; extruding the mixture through a die into an alkaline bath saturated with the ions of the water-soluble salt and at a temperature higher than 90 DEG C. to form a rod, removing the rod from the bath when regeneration of the cellulose is substantially complete, and bringing the rod into contact with water to dissolve the salt particles. The preferred water-soluble salt is trisodium phosphate, and the insoluble filler may be short fibres, fibrilar particles such as wood pulp, or an adsorbent, e.g. activated charcoal, alumina, magnesia, clays or zeolites, fuller's earth, bauxite or ion-exchange resins. Suitably the viscose has a viscosity of about 700 seconds and a salt point of 20, and the extrusion is done by means of a screw extruder. The water used for leaching out the salt particles is suitably at a temperature of at least 80 DEG C., to hasten the leaching and ensure complete regeneration of the cellulose.ALSO:A filter-tip for a cigarette comprises a foraminous rod of regenerated cellulose produced by forming a mixture of (a) a viscose having a bull-fall viscosity of at least 150 seconds and a salt-point of at least 15, (b) a water-soluble salt which forms an alkaline solution in water, of average particle diameter less than 600 microns, the ratio of salt to viscose being at least 3 : 1 by weight, (c) at least 80% by weight of the cellulose in the viscose of a water-insoluble particulate filler; extruding the mixture through a die into an alkaline bath saturated with the ions of the water-soluble salt and at a temperature more than 90 DEG C. to form a rod, removing the rod from the bath when regeneration of the cellulose is substantially complete, and bringing the rod into contact with water to dissolve the salt particles (see Division C3). Exemplified filters contain as water-insoluble fillers a mixture of powdered cellulose and cellulose fibres or an activated powdered carbon adsorbent. These may be used as the inner or adsorbent part of a two-part filter tip or may be used to replace the whole filter tip. Before use, the cellulose rod is usually desulphurised and bleached, unless it contains a dark-coloured adsorbent.
GB5072664A 1964-12-14 1964-12-14 Improvements in and relating to the manufacture of filter elements Expired GB1123617A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB5072664A GB1123617A (en) 1964-12-14 1964-12-14 Improvements in and relating to the manufacture of filter elements
NL6516076A NL6516076A (en) 1964-12-14 1965-12-10
FR42206A FR1459588A (en) 1964-12-14 1965-12-14 Process for manufacturing regenerated cellulose filter tips for cigarettes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5072664A GB1123617A (en) 1964-12-14 1964-12-14 Improvements in and relating to the manufacture of filter elements

Publications (1)

Publication Number Publication Date
GB1123617A true GB1123617A (en) 1968-08-14

Family

ID=10457096

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5072664A Expired GB1123617A (en) 1964-12-14 1964-12-14 Improvements in and relating to the manufacture of filter elements

Country Status (3)

Country Link
FR (1) FR1459588A (en)
GB (1) GB1123617A (en)
NL (1) NL6516076A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2181424A (en) * 1985-09-11 1987-04-23 Malcolm Graham Goodson Zeolite impregnated open-cell foam
WO2006108470A1 (en) * 2005-04-15 2006-10-19 Reemtsma Cigarettenfabriken Gmbh Tabacco smoke filter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2181424A (en) * 1985-09-11 1987-04-23 Malcolm Graham Goodson Zeolite impregnated open-cell foam
WO2006108470A1 (en) * 2005-04-15 2006-10-19 Reemtsma Cigarettenfabriken Gmbh Tabacco smoke filter

Also Published As

Publication number Publication date
FR1459588A (en) 1966-11-18
NL6516076A (en) 1966-06-15

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