Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M14/00—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials
  • D06M14/02—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials on to materials of natural origin
  • D06M14/04—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials on to materials of natural origin of vegetal origin, e.g. cellulose or derivatives thereof
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/02—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with hydrocarbons
  • D06M13/03—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with hydrocarbons with unsaturated hydrocarbons, e.g. alkenes, or alkynes
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/52—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment combined with mechanical treatment
  • D06M13/535—Suction; Vacuum treatment; Degassing; Blowing
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/693—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural or synthetic rubber, or derivatives thereof
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S8/00—Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers
  • Y10S8/11—Isocyanate and carbonate modification of fibers
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S8/00—Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers
  • Y10S8/18—Grafting textile fibers

Definitions

• (0) including into the fibre a relatively elastic substance which has an initial modulus of elasticity lower than of cellulose such as isoprene, butadiene, and the like.
• This invention relates to a method for processing cellulosic fibres (as a fibrous mass, thread, fabric or mesh articles comprising partially or totally cellulosic fibres) in order to improving their textile properties, and in particular their crease-resistance properties.
• creaseresistance is meant both resistance to the initiation of creasing, and recovery from any creasing which is imparted.
• the invention concerns in general terms, a method involving the inclusion in cellulosic fibres (cotton, flax, jute, viscose and so on) whether pure or mixed, of a substance with an initial modulus of elasticity which is less "ice limit this swelling by adjusting the concentration of the solution:
• the invention more particularly comprises a method by which it is possible to introduce an inclusion substance, having an initial modulus of elasticity less than that of cellulose, specifically into the inter-fibrillary spaces level (a) of the cellulose fibres (cotton, flax, jute, viscose and so on) but to avoid any penetration of the substance to the interior of the fibrils (i.e. into the inter-micellary spaces and into the inter-molecular spaces in the fibrilslevels (b) and (c) defined above) and therefore any structural modification at the molecular level of the cellulose.
• the included substance has a modulus of elasticity lower than that of the cellulosic fibre, the transverse modulus of the fibre will not be altered, but its recovery from flexural deformation will be improved.
• the invention accordingly makes it possible to give fabrics better crease-resistant, including crease-recovery, properties.
• the method of the invention consists in that:
• the cellulosic fibres are processed by means of an aqueous solution of an inorganic or organic base (or other) interrupter of the hydrogen bonding by controlling the concentration of such solution in such a manner as to limit the swelling to the level of the inter-fibrillary spaces of the fibres without internal swelling of the fibrils.
• the initial modulus of elasticity is the value of the slope of the straight tangent to the origin of the load/extension curve.
• the average value of the initial modulus of elasticity is approximately 75,000.
• Preferred inclusion substances are those where the modulus of elasticity is lower than times, or preferably lower than A times the cellulose value. [Elastomers are to be preferred.
• the last inclusion liquid may comprise a monomeric precursor of an elastomer, together with an be stabilised by suitable washing and/ or extraction treatments.
• the last inclusion liquid contains an initiator and a catalyst for polymerisation, and after its inclusion has taken place, the cellulosic fibres are exposed to the action of monomer vapour.
• a second variation of the method of the invention involves using a pre-polymerisate of the elastomer in the form of an emulsion, then in bringing about in situ the coagulation of the elastomer in one homogeneous phase, the other second, phase of the initial emulsion being eliminated by appropriate Washing or extraction treatments.
• a third variation consists in creating at the surface of the walls of the fibrils, before the inclusion of the monomer, initiator and catalyst either active polymerisation sites or regions of unsaturated bonding which are able to participate in the polymerisation process.
• a fourth variation consists in including a solution of the first monomer, and then padding-in (foulardage) of a solution of a second monomer different from the first, with subsequent interfacial polycondensation in the spaces to provide a polycondensate elastomer.
• the compound which interrupts the hydrogen bonding may be an inorganic base, such as soda, potash, lithium hydroxide, caesium hydroxide, or an organic base, such as a fatty amine, ethanolamine, or morpholine.
• an inorganic base such as soda, potash, lithium hydroxide, caesium hydroxide
• an organic base such as a fatty amine, ethanolamine, or morpholine.
• methanol methanol followed by benzene.
• organic solvent soluble both in water and in hydrophobic solvents such as acetone or dioxan
• the benzene may be replaced by another aromatic hydrocarbon (toluene, xylene and so on), or indeed any hydrophobic solvent capable of holding the elastomer or its precursors in solution.
• a monomeric precursor for the elastomer use may be made of isoprene, butadiene or other conjugated diene, or an isocyanate/diol combination.
• the nature of the swelling of the cellulosic fibres depends on the concentration of the aqueous base solution used, and may involve (a) the inter-fibrillar capillary spaces, (b) the inter-micellary spaces in the fibrils or (c) the inter-molecular spaces in the fibrils.
• the suitable concentration of swelling agent used in accordance with the invention should be specific for phase a to the exclusion of phases b and c. It depends on the nature of the base used and may readily be determined by previous swelling tests and examination of the swollen test fibres with an electron microscope.
• the specific concentrations of the phases a, b and c respectively should usually be 4%, 8% and 18% the percentages being by weight.
• a suitable concentration of the aqueous solution of soda should accordingly be less than 8%, so that there is no penetration of the swelling agent in the inter-micellary spaces and inter-molecular spaces of the fibrils.
• this preferred suitable concentration is less than and for lithium hydroxide, the preferred suitable concentration is less than 6% by weight.
• the fabric, treated in this way shows under mechanical checking improved crease-resistance without notable loss in mechanical resistance.
• EXAMPLE 2 A fabric based on cellulosic fibres and previously having been subjected to various standard pro-treatments is swollen by a cold 3% solution of lithium hydroxide for a period not exceeding 3 hours.
• the swollen material is rinsed with water and immersed in a bath of anhydrous methyl alcohol. Every 3 hours, the alcohol is renewed until there is total inclusion of anhydrous methanol in place of water. Thereafter the inclusion of anhydrous benzene, is carried out by the same replacement process.
• the material with the benzene thus included, is immersed in a 5% benzene solution of maazo-bis-bntyronitrile (1% to 5%) for a period which may bridge 15 hours.
• the sample is thereafter stretched on a metallic frame and placed in an atmosphere of butadiene vapour in an autoclave. Polymerisation is started by raising the temperature to 60 C. and the sample is kept at this state for 24 hours.
• EXAMPLE 3 Treated sample Control sample Remanent angle (Warp and weft), degree Norm-Loss oi resistance to cracking, 20%.
• EXAMPLE 4 A fabric based on cellulosic fibres is swollen by a 10% aqueous solution of potassium hydroxide after having been subjected to standard wax removing and desizing operations.
• the material is then dried and polymerised, with or without tensioning in a drying stove at a temperature of about 120 C. to 140 C.
• EXAMPLE 1 A cotton fabric, which had been subjected to the various preliminary operations mentioned in Example 1 (swelling, inclusion of methanol and then of benzene) is immersed in a benzene solution of allyl bromide, protected from the light, in an inert atmosphere, for several hours. Allyl cellulose becomes formed at a substitution rate which may vary from 0 to 0.6 (by celluglucane determination). On the material thus obtained, the cycle of operations of stages 2, 3 and 4 described above can be effected.
• a method for processing cellulosic fibre material in order to improve its crease resistance properties comprismg:
• organic base is chosen from fatty amines, ethanolamine and morpholine.
• inorganic base is chosen from sodium, potassium, lithium and caesium hydroxides.
• the series of inclusion liquids include (a) an organic solvent soluble in water and in hydrophobic solvent and (b) a hydrophobic solvent.
• inclusion liquids include: (a) a water-soluble akanol also soluble in hydrocarbon solvents and (b) a hydrocarbon solvent.
• inclusion liquids include (a) methanol and (b) benzene.
• conjugated diene is isoprene or butadiene.
• a method as claimed in claim 1, wherein the aqueous solution is a sodium hydroxide solution of up to 8% concentration by weight.
• aqueous solution is a potassium hydroxide solution of up to 15% concentration by weight.
• aqueous solution is a lithium hydroxide solution of up to 6% concentration by weight.
• a method for processing cellulosic fibre material morder to improve its crease resistant properties comprising:

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Mechanical Engineering (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Chemical Or Physical Treatment Of Fibers (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=8653796

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (3)

• 1968
  • 1968-08-14 FR FR163110A patent/FR1599732A/fr not_active Expired
• 1969
  • 1969-08-04 BE BE737007D patent/BE737007A/xx unknown
  • 1969-08-11 DE DE19691940777 patent/DE1940777A1/de active Pending
  • 1969-08-12 US US849490A patent/US3674539A/en not_active Expired - Lifetime
  • 1969-08-13 CH CH1227669D patent/CH1227669A4/xx unknown
  • 1969-08-13 CH CH1227669A patent/CH589165B5/xx not_active IP Right Cessation
  • 1969-08-13 GB GB40496/69A patent/GB1274747A/en not_active Expired

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