DE2557002B1 - Transfer printing of synthetic fibres using aq. dye dispersions - and polymeric thickeners contg. carboxyl gps. - Google Patents

Abstract

Transfer printing of synthetic materials uses an intermediate carrier printed witn an aq. dye dispersion contg. a polymeric thickener with carboxyl gps. Used for printing of flat materials of polyester, cellulose acetate, polyamide of polyacrylonitrile fibres. Sharp contours and no abrasion of the print on the carrier are obtained. Sublimation of the dye is increased, giving improved colour yield and depth, and allowing a reduction in transfer time. Dyes with relatively low sublimation can be used, which give improved fastness on the fabric to ironing or pleating.

Description

Example 2 A one-sided smooth soda kraft paper with a square meter weight 60g / m2 is used on the smooth side with

printed with a printing ink of the following composition: 100 g of the dye of the formula in a commercially available liquid setting, 700 g of a print thickening consisting of a 2% strength aqueous solution of an ammonium polyacrylate of molar weight. 3000000, registered.

Make up to 1000 g with water or the thickening mentioned The printed and dried paper is put on an ironing press for 60 seconds at 2000C brought into close contact with a fabric made of polyethylene glycol terephthalate threads. The result is a depth of color and a brilliant greenish-yellow print with very good results Fastnesses.

Example 3 A paper suitable for transfer printing is padded with a printing ink of the following composition with the aid of a 100S point roller: 150 g of the dye of the formula in a commercially available liquid setting, 700 g of a print thickener consisting of a 1.596g aqueous solution of a copolymer of acrylic acid and butyl acrylate (molar ratio 4: 1; molar weight 600,000) are stirred in.

The mixture is diluted with water or the aforementioned thickening to 1000 g padded.

The padded and dried paper is placed on a transfer calender 40 seconds at 210 ° C in close contact with a fabric made of polycyclohexanediol terephthalate fibers held. The result is a deep, scarlet dyeing with good fastness properties Example 4 A paper suitable for transfer printing is provided with a printing ink the following composition printed: 100 g of the dye C. 1.26 080 in commercially available Liquid setting are made up of a mixture in 800 g of a pressure thickener from 60 * a 20 / above aqueous solution of an ammonium polyacrylate from the mol-wt. 600,000 and 40% of a 1.59 own aqueous solution of a copolymer of propylene and maleic anhydride (molar ratio 1: 1) from mol wt. 1 500000 stirred in.

With water or the aforementioned thickening, the mixture is increased to 1000 g completed The printed and dried paper is placed on a heatable Special calendar 30 set at 2000 C in intimate contact with a fabric made of cellulose triacetate threads held. The result is an orange-colored print with good fastness properties.

Example 5 A transfer printing paper is printed with a printing ink of the following composition: 100 g of the dye of the formula in a commercial granulate setting are dispersed in 150 g of hot water The dispersion is mixed with 750 g of a print thickener consisting of a 2.5% aqueous solution of a copolymer of acrylic acid and crotonic acid (molar ratio 3: 1, molar weight 500,000), mixed The printed and dried paper is brought into close contact with a knitted fabric of polyethylene glycol terephthalate threads on an ironing press for 80 seconds at 180 ° C. The transfer results in a brilliant blue print with good fastness properties.

Example 6 A paper suitable for transfer printing is padded with a printing ink of the following composition using a 1000-point roller: 120 g of the dye of the formula in a commercially available powder formulation are dispersed in 150 g of hot water. The dispersion obtained is in 700 g of a print thickening consisting of a 2Y aqueous ammoniacal solution of a methacrylic acid polymer of molar weight. 1 000 000, registered.

Make up to 1000 g with water or the thickening mentioned.

The dried paper is on a transfer calender for 60 sec 200 "C brought into close contact with a fleece made of polyethylene glycol terephthalate fibers.

This creates a brilliant purple color on the textile substrate with good fastness properties.

Example 7 A paper suitable for transfer printing is printed with a printing ink of the following composition: 100 g of the dye of the formula In a commercially available liquid setting, 800g of a print thickener, consisting of a 1.5% aqueous solution of a copolymer of crotonic acid and maleic anhydride (molar ratio 2: 1; molar weight 800,000), is stirred in g padded.

The printed and dried paper is stored for 60 seconds.

at 200 "C in close contact with a fabric made of polyamide (nylon 472) threads brought. The transfer results in a brilliant yellow print with good Fastnesses.

Example 8 A paper suitable for transfer printing is made with a Printing ink printed with the following composition: 150 g of the dye C. 1 63285 in commercially available liquid setting are in 850 g of those described in Ex Thickening stirred in.

The printed and dried paper is 40 sec at 1800C in tight Brought into contact with a knitted fabric made of polyamide 6 threads. This creates a brilliant one blue print with satisfactory fastness properties.

Example 9 A transfer printing paper is printed with a printing ink of the following composition: 120 g of the dye of the formula in a commercially available liquid setting, 800 g of the thickening described in Example 2 are stirred into. Make up to 1000 g with water or thickener.

The printed and dried paper is set at 1800C in tight 30 Brought into contact with a fabric made of polyacrylonitrile fibers dark red print with usable fastness properties.

Claims (3)

Claims: 1. Process for the production of transfer prints made of synthetic materials with the help of a printed with aqueous inks Intermediate carrier, characterized in that the for printing on the carrier material Polymerization products containing carboxy groups used in printing inks as thickeners contain. 2. Printing ink for performing the method according to claim 1, characterized characterized in that they contain polymerization products containing carboxy groups as thickeners contains. 3. carrier material for carrying out the method according to claim 1, characterized in that it has been printed with printing inks or swabbed which contain polymerization products containing carbon oxy groups. When printing on materials made from synthetic fibers, especially from Polyester, the so-called transfer or thermal printing has steadily gained in importance and found wide acceptance in the printing industry. In this process is known to be a sublimable dye, in particular a disperse dye, on a carrier material, preferably paper, applied and the pre-colored carrier material with the substrate to be colored under Brought into contact with heat. Usually the paper used as the carrier material is more special Quality on paper printing machines in rotogravure printing with printing inks containing solvents printed. In view of the difficulties associated with these solvents Attempts have also been made to make paper with gasoline-containing half-emulsions or with to print purely aqueous printing inks on textile printing machines. In this procedure however, it is difficult to get prints well on the paper. Furthermore, the dimensional accuracy of the paper carrier when printing with aqueous printing inks often not guaranteed. In addition, the rubbing off of the dried prints is poor. There has now been a method of making transfer prints Synthetic fiber materials using one printed with aqueous inks Found carrier material, which is characterized in that the aqueous printing pastes contain polymerization products containing carboxy groups as thickeners. The term "printing" is also understood here and in the following to mean patting. The prints obtained in this way are sharp and not at all Abrasion on. In addition, the dye sublimates during the transfer increased, which significantly improves the color yield and color depth of the Pressure results. Furthermore, there is a reduction due to the increased sublimation ability the transfer time possible. In addition, transfer printing can also be carried out with dyes are that according to the prior art due to their relatively low Sublimation could not be used. Since according to the invention Process also sublimation-fast dyes with good color yield te transferred it has become possible to check the fastness of the finished fabric print, z. B. to improve the ironing or pleating authenticity. Subjects of the invention are also the printing ink according to claim 2 and the carrier material according to claim 3. Polymerization products containing carboxy groups come in Consideration: Aqueous solutions or swellable dispersions of polymerized low molecular weight simply ethylenically unsaturated mono- or dicarboxylic acids, such as polyacrylic acid and their homologues, e.g. B. the polymerization products of methacrylic acid or Crotonic acid, as well as from the polymers of carboxy-alkyl derivatives such as Itaconic or teraconic acid, likewise aqueous solutions or dispersions of polymerized Maleic acid or its anhydride and fumaric acid and its homologues, such as. BX Citraconic or mesaconic acid and also of copolymers of olefins, e.g. B. ethylene or propylene or lower alkyl acrylates and the aforementioned monomers. The aqueous solutions or swellable dispersions of the above Polymer products can, insofar as they form usable thickenings, as such, d. h in an acidic pH range, used or by adding alkalis or ammonia transformed into the corresponding salts and used in this form as a thickener will. Contain the printing inks used for the process according to the invention generally 0.5 to 5, preferably 1-2% by weight of the polymers mentioned. The addition of other conventional thickeners or binders is possible, but not required. The printed papers functioning as an intermediate carrier according to the invention are characterized by good dimensional accuracy. Furthermore, the prints have a sharp stand and no abrasion after drying. As substrates for transferring the dyes from the carrier material flat structures made of polyester, in particular polyethylene glycol terephthalate, Cellulose acetates, polyamides and polyacrylonitrile into consideration. In the following examples the percentages relate to the weight Example 1 A white bleached wood-free flexographic printing paper is made with printed with a printing ink of the following composition: 60 g of the dye C. I. 60756 in a commercially available liquid setting are packed in 800 g of a pressure thickening, consisting of a 1.5% aqueous solution of a copolymer of ethylene and Maleic anhydride (molar ratio 1: 1; molar weight 2,000,000), stirred in. The mixture is completed with water or the mentioned thickening to 1000 g The printed and dried paper is put in close contact on an ironing press for 30 sec. at 200 "C brought with a fabric made of polyethylene glycol terephthalate fibers. There arises a Deeply colored and brilliant pink print with good fastness properties.