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
  • D06M11/385—Saponification of cellulose-acetate
• • 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
  • Y10S8/92—Synthetic fiber dyeing
  • Y10S8/921—Cellulose ester or ether

Definitions

• the ironability of a cellulose-2 /2-acetate is limited and can be carried out satisfactorily only at temperatures below 160 0., since the material to be ironed becomes rippled at higher temperatures.
• Present textile or knitted fabrics of cellulose-2 /z-acetate also have a low wash stability and a high electrostatic charge.
• dyed pieces have poor gas fading properties in using critical dyestuffs.
• the wetted product running without tension on a jig first passes throughat room temperaturea lye solution bath which is brought to lye content from l2% referring to the product weight, at a bath ratio to the product introduced of 1:3 to 1:10 by product weight.
• the bath is then heated to l00 C., preferably -90" C. (since at a higher temperature unpleasant handle influencing results).
• Several product passes are then carried out, the proportion of the lye solution being increased to 3, then 45% (with respect to the product weight).
• the operation life of the product in this bath amounts to about 1 hour.
• the lye solution is discharged.
• the product is washed and subsequently neutralized with acetic acid.
• the thus obtained product has a uniform surface saponification which yields entirely even dye qualities.
• the acetyl number decreases at about 1.5- 2% in the above described treatment.
• This low surface saponification is sufiicient to greatly increase the ironability and wash stability.
• the electrostatic charge of this product is reduced to a fraction.
• the exhaust gas effectiveness is also considerably improved as compared to pieces not pretreated in such manner, particularly for critical dyestuffs.
• the material is wetted in water in two passes at 25-30 C.', the wetting bath is then discharged.
• a bath is prepared of 2.5 gr./l. of alkali-containing washing agent and 1% (referring to the product weight) of potassium hydroxide.
• the product passes through the bath once at 22 C.
• the alkali content of the bath is doubled.
• a second product pass takes place.
• the bath is then quickly heated to 87 C. while the goods are stationary. Two passes follow.
• Sufficient potassium hydroxide is then added so that the alkali content is 3%, referring to the product Weight.
• a new product pass follows; then the alkali content is again increased, so that it is finally 4%, referring to the product weight.
• the product runs through the heated lye bath for 1 hour.
• the alkali solution is then discharged.
• washing takes place in cold water.
• it is neutralized in cold water acetate, then rewashed with water. Thereafter it is dyed and finished in the customary manner.
• the thus obtained product has an acetyl number of 52.8%, its ironability, without rippling, has been increased from to 233 C., the wash stability has been stepped up from 26,350 revolutions up to hole formation to 51,300 revolutions, and the electrostatic charge has been decreased from -1700 v./ cm. to 1000 v./cm.
• a process for obtaining cellulose-Z-Vz-acetate fabric of improved ironability, increased wash stability and decreased electrostatic charge characterized in that after wetting with water in two passes at approximately room temperature, the raw materials are first treated in a solution of potassium hydroxide at room temperature and a bath ratio between 1:3 to 1:10 with slowly rising alkali content which is first raised from passage to passage in the jig of only 1% to about 2% of the material weight introduced, heating the solution to 80-100 0, treating the product in the heated solution for about one 4-5% of the introduced raw material weight in steps of 1% and thereby limiting the saponification to the surface.

Landscapes

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

Applications Claiming Priority (1)

Publications (1)

Family

ID=7052076

Family Applications (1)

Country Status (9)

Cited By (1)

Families Citing this family (1)

• 1966
  • 1966-03-24 DE DE19661594988 patent/DE1594988A1/de active Pending
• 1967
  • 1967-03-20 NL NL6704135A patent/NL6704135A/xx unknown
  • 1967-03-22 ES ES338347A patent/ES338347A1/es not_active Expired
  • 1967-03-23 AT AT281767A patent/AT280942B/de not_active IP Right Cessation
  • 1967-03-23 GB GB13688/67A patent/GB1150832A/en not_active Expired
  • 1967-03-23 CH CH421667A patent/CH468506A/fr unknown
  • 1967-03-23 FR FR100056A patent/FR1519057A/fr not_active Expired
  • 1967-03-24 BE BE696104A patent/BE696104A/xx unknown
  • 1967-08-30 US US664291A patent/US3595605A/en not_active Expired - Lifetime

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