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
  • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
  • D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
  • D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
  • D06M11/38—Oxides or hydroxides of elements of Groups 1 or 11 of the Periodic Table

Definitions

• Patent Specification W080 / i00463 'a process is described for imparting easy care properties to linen products, optionally mixed with voscose.
• Viscose is soluble in- alkali and s ince many o £ the conventional treatments for giving easy care
• cellulose can be obtained by treating the fabrics with a compound that evolves formaldehyde when heated followed by treatment with a solution containing 2 to 61 alkali and a glycol softener.In practice however this method does not give very satisfactory results when applied
• the agent is cured, the fabric is then mercerised while allowing shrinkage o £ viscose fibres, and the viscose fibres in the fabric are allowed to remain permanently shrunk by at least 5%.
• the fabric may be formed solely o £ viscose
• fibres or it may 3 ⁇ 4e formed of viscose fibres together with other fibres, generally in an amount o £ no.t more i than 50% by weight.
• viscose fibres and other fibres the fabric may be formed0 of yarns consisting of viscose and yarns consisting o £
• the other fibres but more usually is formed o £ yarns each comprising a blend of viscose and the other fibres.
• Formaldehyde donors may be used but preferably the initial cross -linking is
• This cross-linking agent is a bi- or poly-functional reagent that will react with, and thus bridge and cross-l ink, hydroxy groups in the cellulos e.
• Typical bi- or poly-functional compounds that serve as cross -linking agents are alcohols, triazones, aldehydes such as glyoxal, and methylol urea derivatives that will react with, cellulose in preference to undergoing self polymerisation, such, as dimethylol cyclic
• Activators suitable for use with such cross-linking agents are well known and are generally referred to as catalysts or curing agents.
• citric or succinic acid or acidic salts such, as citric or succinic acid or acidic salts such, as citric or succinic acid or acidic salts
• phase separation catalysts such, as these, non-phase
• cross -linking agent and activator are N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-silyl-silyl-silyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethy
• aqueous solution containing, for instance 10 to 30% o £ the cross -linking agent and
• the pick up may be, for
• Curing of the cross-linking system may be any suitable cross-linking system.
• mercerising reagents and temperatures may be used for the mercerising step in the invention.
• Suitable reagents are strong ammonia, cuprammonium
• alkaline earth metal hydroxides for instance calcium
• hydroxide or alkali metal hydroxides generally sodium
• concentrations of caustic soda or other reagent are 10
• 60 ° Tw.Treatment preferably comprising es impregnat i on e.g. by immers ion in a 3 owl trough mangle at a
• alkali with alkali is generally relatively quick, for instance 10 I to 30 minutes and usually 1 to 10 minutes ⁇ whereupon
• the fibrous material is washed with water to eliminate the allcali or other mercerising reagent.
• T 'it is a fact that appropriate combination of cross-linking 25 followed by mercerisation and permanent shrinlcage results in a surprising improvement in the wet crease resistance of the fibres.
• cross-l inking agent is one that is degraded by the
• the preferred cross-linking agents are:
• cyclic alkylene urea derivatives for instance d ihydroxy dime thy lol cyclic methyl ene or ethylene urea and it is
• CTOS S linking should be above 31 add-on, since with lower amounts
• the conditions o £ mercerisation are such, that the weft viscose fibres have a final shrinkage of at .least SOI and preferably at least 75 3 ⁇ 4 o £ their potential shrinkage and the warp fibres have a shrinkage of at l east 251
• the duration of the jnercerisation should be sel expected to be suffici ently long to achieve the des ired degree of shrinkage .
• O PI cross-linking for instance equ ival ent to 15 3 ⁇ 4 add-on or less
• the mercerisation may be conducted while
• the fabric may then be pulled lengthwise (i.e. in the warp direction) to the next
• processing stage for instance rinsing and drying
• the weft shrinkage which also will preferably have been the maximum shrinkage attainable, may be allowed to
• the shrinkage that remains in the weft fibres is at least 103 ⁇ 4, generally 10 to 25% and
• shrinkages may be similar but lower shrinkages can be tolerated and may be up to, for instance, 153 ⁇ 4, usually S to 12% and most preferably 8 to 10%.
• proportion of viscose fibers will generally have a wet
• resins are l nown for the treatment of cotton and may
• the dry crease res istance is improved by subj ecting the fabric to a final cross-S linking, general ly using about half the amount of cross- linking agent used for the initial cross-linking, so that the solids add-on is preferably about 2 to 103 ⁇ 4, e.g 3 to 71 most preferably around S% .
• This reduced add-on may be
• the final dry- crease angle will be 110 to 140 ° C.Best results are generally obtained using a non-phase
• Fabrics made by the invention have a soft handle and good wet crease resistance, and optionally
• Another advantage of. The invention is that
• a f bric may tie formed of yarn formed of a blend of viscose and 25% linen or cotton fibres .
• the fabric may be impregnated while held on a stenter with
• ethylene urea activated with 2% -w / v triethylene glycol citric acid polyester The acid value of the polyester may be about 190 and the pH of the impregnating solution should be at least 3. 2. The wet pick up of the fabric
• 10 may be about 701 and the dry add-on a out 10% by weight.
• the fabric may then be dried on the stenteT, heated to a temperature o £ about 170 ° C for 2 minutes, washed and
• the fabric may then be passed into and pulled IS out of a bat of caustic soda solution o £ about 301
• the duration of contact between the caustic soda solution and the viscose fibres may be about 1 to 2 minutes.
• the tension applied in the length is sufficient to permit the fibres to shrink, and the length, of the, 'fabric to reduce, by about 10%.
• the washed fabric may then be dried.It will have very high, wet crease resistance and may be dyed
• Example 1 The process of Example 1 may be repeated us ing magnesium chloride as the activator instead of the
• Example 1 S The process of Example 1 may be repeated but
• the mercerisation may then be conducted by impregnating the fabric, after cross-linking, with 301 caustic soda.
• Example 1 or Example 2 may be
• the fabric may then be impregnated with, a 10% / v
• the impregnation may be conducted while
• Example 1 or Example 2 may be any process of Example 1 or Example 2.
• formaldehyde resin having a molar ratio urea: formaldehyde0 of 1: 4 and ammonium di ydrogen phosphate activator at
• the resin may then be cured by heating, followed by
• Tlie fabrics treated and shrunk in th.enrocess of e invention may be used to make shaped goods, eg clothes by conventional methods, while in their permanent shrunk state.

Landscapes

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

Priority Applications (3)

Applications Claiming Priority (5)

Publications (1)

Family

ID=26276092

Family Applications (1)

Country Status (10)

Cited By (2)

Families Citing this family (6)

Citations (5)

Family Cites Families (2)

• 1981
  • 1981-07-01 JP JP56502228A patent/JPS57501189A/ja active Pending
  • 1981-07-01 HU HU812296A patent/HU184471B/hu unknown
  • 1981-07-01 BR BR8108671A patent/BR8108671A/pt unknown
  • 1981-07-01 EP EP81303002A patent/EP0044172A1/en not_active Ceased
  • 1981-07-01 WO PCT/GB1981/000120 patent/WO1982000164A1/ja not_active Ceased
  • 1981-07-02 PT PT73309A patent/PT73309B/pt unknown
  • 1981-07-02 GR GR65412A patent/GR74368B/el unknown
  • 1981-07-02 ES ES503628A patent/ES503628A0/es active Granted
  • 1981-07-03 PL PL23202681A patent/PL232026A1/xx unknown
• 1982
  • 1982-03-02 NO NO820648A patent/NO820648L/no unknown

Patent Citations (6)

Non-Patent Citations (2)

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