Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
  • D06P5/003—Transfer printing
  • D06P5/004—Transfer printing using subliming dyes
  • D06P5/005—Transfer printing using subliming dyes on resin-treated fibres
• • 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
  • Y10S8/916—Natural fiber dyeing
  • Y10S8/918—Cellulose textile

Definitions

• the present invention relates to new transfer media, especially those made of paper, for the thermal dry printing of water-swellable cellulose fibers or threads or textiles containing them, optionally in mixtures with synthetic fiber, especially based on polyester, with disperse dyes using polyglycols and / or Polyglycol derivatives.
• transfer printing uses transfer printing substrates, generally made of paper, which carry the pattern to be transferred, which consists of several or one dye. In contact with a textile material, the pattern is at 160 to 210 0 C over from the transfer sheet to the textile.
• the dyes customary for transfer printing belong to the class of disperse dyes, which are known to have only a low affinity for natural fibers, which is why transfer printing has practically only established itself for synthetic fibers, in particular for fabrics and knitted fabrics made of polyester.
• the attempts to make native fibers, especially those made of cellulose, available for transfer printing can be roughly divided into three groups: pretreatment with a resin, chemical modification of the fiber and treatment with a solvent for disperse dyes.
• the resin pretreatment is known, for example, from Swiss patent 564 637, which teaches that a cotton web is impregnated with an etherified methylolmelamine. After intermediate drying, the pre-impregnated goods are printed in the transfer. The melamine resin is condensed out during the printing process.
• the cellulose fiber can be given an affinity for disperse dyes by chemical modification, in particular acetylation, benzoylation, cyanoethylation, cyanuration and grafting of styrene.
• chemical modification in particular acetylation, benzoylation, cyanoethylation, cyanuration and grafting of styrene.
• the depth of color and the handle of the chemically modified cotton are satisfactory, the process has not been able to establish itself properly because the method is complex and costly and because the washfastness of the prints is unsatisfactory (see, for example, Eisele and Fiebig, Meliand Textile Reports 61, 956-961 (1980).
• saturated solutions or dyes are expediently prepared in boiling 0: 1 molar sodium carbonate solution and the optical absorption capacity is measured using a commercial spectrometer. Only those disperse or vat dyes are considered whose absorption capacity is not greater than 0.3.
• Such dyes are known from German patent specification 1 811 796 and from German patent application 25 24 243. They are mainly molecules with a molecular weight greater than 350 and high sublimation fastness, which are difficult to volatilize.
• the transfer printing media according to the invention are characterized in that they carry a release layer on a flexible, heat-resistant base, for example a paper web, on which a mixture of a binder with one or more dyes is applied in the form of a uniformly colored layer or pattern.
• the motif can be applied with any printing method, eg gravure, screen printing, offset.
• the existing of binder and dyes - motif, which has the form of either a colored layer or one or more tints containing pattern is transferred in its entirety by application of pressure and temperature to the fabric substrate.
• the release layer makes it easier to transfer the motif from the transfer printing medium to the textile web by reducing the strength of the motif's adhesion to the base.
• Release layers are well known to the person skilled in the art; they consist, for example, of a silicone resin layer or of a layer of another resin with low adhesive properties.
• the printing of surfaces with a release layer with aqueous printing inks is problematic because of the poor wettability, which is why inks with a non-aqueous solvent are advantageously used.
• the binder consists of one or more high molecular weight organic substances, at least one of which is a film former.
• the high molecular weight organic substances are characterized in that their softening or. Melting point is between a minimum of 50 and a maximum of 150 ° C, preferably a maximum of 100 ° C.
• the high molecular weight organic substances are examples of the class of resins and waxes.
• Examples include natural waxes, maleinate resins, phenolic resins, urea resins, resins from unsaturated hydrocarbons, epoxy resins, polyamide resins, polyglycols with a molecular weight of at least 1000, polyolefin waxes, natural waxes, Fischer-Tropsr-h waxes, amide waxes, fatty acid esters, fatty alcohols.
• Maleinate resins and rosin-based resins are preferably used, for example the esters of polyhydric alcohols such as glycerol and pentaerythritol esters.
• the phenyl and benzoyl radicals can contain simple substituents, e.g. Methyl, ethyl, chlorine, bromine, methoxy, trifluoromethyl residues, even butyl or isoamyl residues, but preferably they do not contain any nitrogen-containing substituents.
• a printing ink must be produced from them to select the dyes.
• These printing inks can be of the offest type, aqueous printing inks or solvent printing inks, and the techniques for producing printing inks are known.
• the dye is used in 100% pure form as a dry press cake in a ball mill, e.g. of the "Dynomill” type (Bachofen, Basel) ground in industrial ethyl alcohol, which contains a binder known from the technique of conventional sublimation transfer printing, for example ethyl cellulose N-7 (Dow Chemicals).
• a ball mill e.g. of the "Dynomill” type (Bachofen, Basel) ground in industrial ethyl alcohol, which contains a binder known from the technique of conventional sublimation transfer printing, for example ethyl cellulose N-7 (Dow Chemicals).
• the preferred concentrations are 5-10% binder and a maximum of 10% dye.
• the grinding process is carried out until 90% of the dye particles have a diameter of less than three micrometers and none of them larger than five micrometers.
• a paper carrier is printed in gravure, as is known from conventional transfer printing. These transfer printing carriers are then used to carry out transfer printing tests on a swollen cotton fabric.
• the swelling of the cotton fabric was carried out according to the instructions known from German patent 1811 796.
• U he patent teaches that the swelling state of the cotton caused by treatment with water can be maintained after drying by a polyglycol, for example polyethylene glycol with a molecular weight between 300 and 1100, the concentration of the glycol being, for example, 10 to 20% of the cotton weight.
• a polyglycol for example polyethylene glycol with a molecular weight between 300 and 1100, the concentration of the glycol being, for example, 10 to 20% of the cotton weight.
• the transfer medium is pressed against the swollen cotton fabric with a contact pressure of 5 ⁇ 10 4 Pa at a temperature of 235 ° C. for 30 seconds, while the sandwich is held at an air pressure reduced to 10 4 Pa.
• the red dyes are The red dyes:
• the blue dyes are:
• a printing ink is made by way of example 10% dye, 10% binder and 80% solution - containing medium. This printing ink is used to print a motif containing one or more dyes on a base paper provided with a release layer.
• the transfer printing on dry, swollen cotton is then carried out at 235 ° C. with a contact pressure of at least 10 4 Pa, in 30-60 seconds.
• the handle is remarkably good and the rubbing fastness is very good after the first wash.
• the new transfer carriers are characterized by the possibility of being able to use dyes which cannot be re-printed at all in conventional sublimation transfer printing due to their high sublimation fastness and in sublimation transfer printing with reduced air pressure, despite high mechanical expenditure, with moderate yields. This makes it possible to take advantage of the adaptability of transfer printing on natural fibers while maintaining the textile mechanical properties and respecting the required fastness properties, in particular the fastness to washing.
• a screen printing ink is produced by dissolving 40 parts of the "ERKAREX 1560" phthalate resin (R.Kraemer GmbH) and 5 parts of Polywachs 6000 in 90 parts of ethyl alcohol. 50 parts of a 20% alcoholic dispersion of the dye C.I. Disperse Red 346 added.
• a cotton fabric with a solution of 10% polypropylene glycol 425 in water is squeezed off with a pad to 100% weight gain and dried in a tenter at 120 ° C. for one minute.
• the paper is held against the pretreated cotton fabric for 45 seconds using a thermal printing press from Kannegiesser (Vlotho) with a contact pressure of 5 ⁇ 10 4 Pa at 235 ° C. (temperature of the heating plate of the press).
• a varnish is produced on a three-roll mill by mixing 42 parts of lacquered linseed oil, 20 parts of mineral oil and 38 parts of a "Albertol KP 351" phenolic resin (Hoechst AG)
• the printing ink is made on a three-roll mill from 20 parts of the dye C.I. Disperse Blue 327, 85 parts of varnish, 5 parts of Aerosil R 972 (Degussa AG) and 2 parts of co-siccative.
• a release paper is produced by coating a 60 g / m 2 base paper with a solution of 67 parts of ethyl alcohol, 3 parts of toluene, 25 parts of the "Eurelon 2300" polyamide resin (Schering AG) and 5 parts of the "Cibamin M-100 melamine resin "(Ciba-Geigy AG).
• This release paper is printed on a conventional offset machine from "Heidelberg Offset”.
• a fabric made of 50% cotton and 50% polyester is squeezed to 80% weight gain by treatment with a 10% aqueous solution of polypropylene glycol 425 using a foulard and dried on a tenter at 120 ° C. for one minute.
• the offset-release transfer paper is printed on the mixed fabric for 45 seconds with a contact pressure of 5 ⁇ 10 4 Pa at 230 ° C.
• a brilliant blue print is created.
• the feel of the fabric and the fastness properties are acceptable after the transfer printing, after rinsing with cold water they become very good.
• the part of a cotton fabric to be printed is pretreated by spraying with a 2% aqueous solution of polyethylene glycol 600. The mixture is then dried at 190 ° C. for 30 seconds.
• a transfer substrate produced according to Example 2 is placed on the pretreated part of the cotton fabric for 45 seconds at 230 ° C., a contact pressure of 5 ⁇ 10 4 Pa and an air pressure of 2 ⁇ 10 4 Pa.
• a stock thickening for a gravure ink is produced by dissolving 12.5 parts of a glycerin resin ester type "Halwepal - G" (Chemische Werke Wegtenes-Albertus) in a mixture of 40 parts of ethyl alcohol and 40 parts of methyl - ethyl ketone. This thickening of the trunk is divided into three parts.
• the first part of this solution is mixed with 92.5 parts of stock thickening 7.5 parts of the dye C.I. using a "Dynomill" type ball mill (Bachofen AG). Ground Disperse Red 346. The milling process is carried out until 90% of the dye particles are smaller than 3 micrometers and the largest particles are smaller than 5 micrometers.
• the base release paper described in Example 1 is then printed with three cylinders using a conventional gravure printing machine. Intermediate drying is required after each cylinder.
• the cylinders are engraved in such a way that the superimposition of the three prints according to the trichomy principle provides an image of a motif.
• a fabric made of mercerized cotton is padded with a ten percent aqueous solution of a polyglycol-boric acid ester, which is commercially available under the name "Glyecin-CD" (BASF), and a Minute dried in a stenter at 120 ° C.
• the helio-release transfer paper is printed on the goods prepared in this way for 40 seconds at 230 ° C. with a contact pressure of 10 5 Pa.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Coloring (AREA)
• Polysaccharides And Polysaccharide Derivatives (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=4272132

Family Applications (2)

Family Applications After (1)

Country Status (6)

Cited By (1)

Families Citing this family (8)

Citations (14)

Family Cites Families (10)

• 1983
  • 1983-06-30 WO PCT/CH1983/000085 patent/WO1984000325A1/fr not_active Application Discontinuation
  • 1983-06-30 JP JP58502049A patent/JPS59501255A/ja active Pending
  • 1983-06-30 EP EP83810295A patent/EP0099333B1/fr not_active Expired
  • 1983-06-30 DE DE8383810295T patent/DE3366444D1/de not_active Expired
  • 1983-06-30 EP EP83901895A patent/EP0114833A1/fr active Pending
  • 1983-06-30 AT AT83810295T patent/ATE22418T1/de not_active IP Right Cessation
• 1986
  • 1986-03-12 US US06/842,592 patent/US4682983A/en not_active Expired - Fee Related

Patent Citations (14)

Non-Patent Citations (8)

Also Published As

Similar Documents

Legal Events