Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06Q—DECORATING TEXTILES
  • D06Q1/00—Decorating textiles
  • D06Q1/12—Decorating textiles by transferring a chemical agent or a metallic or non-metallic material in particulate or other form, from a solid temporary carrier to the textile
• • 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
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/244—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons
  • D06M15/248—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons containing chlorine
• • 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
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/39—Aldehyde resins; Ketone resins; Polyacetals
  • D06M15/423—Amino-aldehyde resins

Definitions

• This invention relates to the pre-treatment of natural and regenerated cellulosic fibres and blends thereof with synthetic fibres for the purpose of subsequent transfer printing.
• a process for the pre-treatment of natural and regenerated cellulosic fibres and blends thereof with synthetic fibres for the purpose of subsequent transfer printing comprising applying to said fibres a composition comprising a mixture of hexamethoxymethyl melamine and a C 4-8 glycol in the presence of water, and drying said fibres at a temperature below 180°C.
• the preferred proportion by weight betwen the amount of the hexamethoxymethyl melamine and the glycol varies according to the ratio of synthetics the cellulosics in the fibre blends; for example, for fibre blend ratios of 95/5 to 65/35 (% synthetics/cellulosics), the preferred ratio of these compounds is in the range 1:1 to 1.5:1; for fibres blend ratios of 65/35 to 20/80 (% synthetics/­ cellulosics), the preferred ratio of these compounds is in the range 1.5:1 to 3:8; for fibre blend ratios of 20/80 to 100 (% synthetics/cellulosics), the preferred ratio of these compounds is in the range 3:8 to 3:1. However, the proportions will also depend on the properties required from the printed product.
• C 4-8 glycols are 2-methyl-butane-1,­4-diol; butane-1,2-diol; butane-1,3-diol; butane-1,4-diol and butane-2,3-diol; hexane-2,5-diol; pentane-1,5-diol and neopentyl glycol.
• the glycols used are 2-methyl-pentane-2,4-diol;2-methylpentane-1,5-diol;hexane-1,­6-diol.
• the melamine is water insoluble, or partly or sparingly soluble.
• pure hexamethoxymethyl melamine is a water soluble substance. To render the melamine water insoluble, it is slightly self-condensed. The production of this condensed compound is well-known and is generally as follows:
• the amounts of hexamethoxmethyl melamine in the composition is preferably 6.7 to 120g/l at 75% composition pick-up by weight of fabric, or 0.5 to 9% by weight of the textile fibres treated, and the amount of glycol is preferably at least 13.3g/l, or at least 1% by weight of the textile fibres treated. More preferably 20g/l (or 1.5% by weight of the textile fibres treated) of each compound may be used for a 65/35 fibre blend fabric, 30g/l and 20g/l respectively of the melamine and glycol for a 50/50 fibre blend fabric and 100g/l and 40g/l respectively of melamine and glycol for a 100% cellulosic fabric. These figures are for a 75% composition pick-up by weight of fabric. It will be appreciated that the above respective amounts of melamine and glycol are always subject to the proportions indicated in an earlier part of this specification.
• polyvinyl chloride or polyvinylidene chloride polymer and copolymer emulsions or dispersions may be added to the composition to enhance the wet fastness properties.
• the latter is generally added in an amount in the range of 10 to 20g/l at 75% composition pick-up by weight of fabric or, 0.5 to 2.5% by weight of fibre mixture treated.
• the soft handle of 100% cotton fabrics, pre-treated, dried and subsequently transfer printed, is enhanced further by addition of 2.5% to 25%, preferably 10% by weight of the polyvinyl chloride polymers or copolymers used of plasticisers, such as dibutyl phthalate, sebacate esters and other plasticisers ordinarily used to plasticise polyvinyl chloride films.
• plasticisers such as dibutyl phthalate, sebacate esters and other plasticisers ordinarily used to plasticise polyvinyl chloride films.
• the application of the composition to the fibres may be effected, for instance, by padding, spraying, coating, printing or impregnation.
• pre-treatment effected by padding
• conventional techniques are used and the uptake of solids from the bath is regulated according to requirements in a manner well known to persons skilled in the art.
• spraying an atomiser may conveniently be used spraying the fabric at the area designated for the transfer of the coloured design.
• This kind of pre-treatment is, of course, more economical as only the necessary surface needs to be sprayed and no padding and stentering are needed. T-shirts lend themselves very well for this kind of pre-treatment.
• the present invention uses a relatively small concentration of the hexamethoxymethyl melamine acting as the crosslinking resin.
• a highly satisfactory colour yield is obtained by the use of the glycol. Therefore, this is the criterion of the invention, namely the use of the glycol in conjunction with a small amount of hexamethoxymethyl melamine.
• the glycol is mainly responsible for the colour yield.
• the melamine is used predominantly for the crosslinking of the polyvinyl chloride and glycol. Exceptional colour yield, being similar to that obtained when transfer printing 100% polyester, can be obtained using correct transfer temperatures and dwelling times, for example, 200°C., for 30 seconds.
• the fastness properties are comparatively good and the fabric preserves the handle it had before being pre-treated.
• compositions for the pre-treatment of natural and regenerated cellulosic fibres and blends thereof with synthetic fibres for the purpose of subsequent transfer printing comprising a mixture of hexamethoxymethyl melamine and a C 4-8 glycol, in the presence of water, and optionally, an emulsion or dispersion of polyvinyl chloride, or polyvinylidene chloride polymers and copolymers.
• compositions for use in a composition for the pre-treatment of natural and regenerated cellulosic fibres and blends thereof with synthetic fibres for the purpose of subsequent transfer printing comprising a solution of hexamethoxymethyl melamine in a C 4-8 glycol.
• the above composition may subsequently be admixed with water and the optional polyvinyl chloride or polyvinylidene chloride polymer or copolymer emulsion or dispersion added by the end user of the product.
• the fabrics to be printed as in example 1 were padded at 75 to 80% of composition pick-up by weight of fabric and dried at 120°C. and were then ready for transfer printing, as above.
• Example 1 The wet fastness properties in Example 1 were comparable to previous pre-treatments, but superior in Example 2.
• a 65/35 polyester/cotton and a polyester/viscose woven upholstery fabric was printed and coated respectively on a Stork Rotary printing, respectively, coating machine with the following composition:
• the printing/coating speed was 35m/minute.
• the fabric was then dried on a 5 bay stenter (15 meters) at 140°C.
• a 50/50 polyester/cotton sheeting fabric (plain weave) was treated in similar fashion to the method in Example 3 with the following composition:
• a 65/35 polyester/cotton single knit fabric was sprayed, with a simple atomiser, with the following composition:
• a 65/35 polyester/cotton double knit jersey and 65/35 polyester/viscose single knit jersey and 65/35 polyester/viscose woven apparel fabric (twill construction 2:1) were impregnated at room temperature (18°C.) in a tub, with a composition consisting of:
• Drying temperatures were chosen in 20°C. intervals between 100 to 180°C.
• the fabrics were subsequently transfer printed with conventional transfer papers, printed by the Bafixan process of BASF AG.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• General Chemical & Material Sciences (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Coloring (AREA)

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Citations (3)

• 1987
  • 1987-06-16 EP EP19870401349 patent/EP0250314A3/de not_active Withdrawn

Patent Citations (3)

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