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
  • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
  • D06M23/04—Processes in which the treating agent is applied in the form of a foam
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M1/00—Inking and printing with a printer's forme
  • B41M1/12—Stencil printing; Silk-screen printing
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
  • D06B19/00—Treatment of textile materials by liquids, gases or vapours, not provided for in groups D06B1/00 - D06B17/00
  • D06B19/0088—Treatment of textile materials by liquids, gases or vapours, not provided for in groups D06B1/00 - D06B17/00 using a short bath ratio liquor
  • D06B19/0094—Treatment of textile materials by liquids, gases or vapours, not provided for in groups D06B1/00 - D06B17/00 using a short bath ratio liquor as a foam

Definitions

• This invention relates to a method of printing a substrate in a pattern with a viscous mass in the form of a foam using a screen printing machine.
• the invention is accordingly characterized by using a foam having meta-stable foam properties.
• the starting point is such a stable foam that the foam structure is substantially maintained during the application in the substrate and during the subsequent drying.
• the foam will inevitably be subjected to high shearing forces, a small proportion of the foam cells will loose their original structure and burst. This will generally not be in excess of 10-15% of the cells.
• the foam When ejected from the screen, the foam is clearly deposited in the fleece material as an extrusion pillar.
• This opens up the constructive route to new types of fibrous webs.
• the desired combination of properties can be supported by a suitable material selection of binder type, fiber mixture and web structure.
• the technique of pattern printing by means of dimensionally stable foam compositions opens up the possibility of introducing new structures by:
• the composition of the dimensionally stable foam does not involve any novel particular aspects: the high foam stability can be achieved by using features long since known to the art.
• a suitable surfactant one may provide for a high viscosity, for the addition of foam stabilizers or anti-desiccants, for the use of low-molecular emulsifiers, and for the use of a high dry content.
• the dry content should be at least 20%. The higher the content of dry matter, the faster the binder will coagulate upon forced drying, as a result of which the foam structure is maintained.
• composition of matter from which the foam is prepared usually comprises an aqueous dispersion, although it is quite possible to use other solvents or dispersing agents, such as ethylacetate.
• aqueous dispersion usually comprises water, although it is quite possible to use other solvents or dispersing agents, such as ethylacetate.
• water is used as this presents little or no environmental problems.
• metal-stable foam as used in this connection means a foam which satisfies the following test.
• a volume of 1 1 of foam is separated in a measuring cylinder covered, and allowed to stand at 20°C for 24 hours. Evaluation is then effected by measuring the amount of liquid settled.
• a foam suitable for use in the dimensionally stable foam paste will exhibit no settled liquid after 24 hours. Such a foam is considered meta-stable.
• Suitable are, for example, all sorts of textile fabrics, knitted fabrics, for example, a "Raschel” fabric or a tricot fabric, "non-wovens” whether or not in combination with a fabric scrim, foam structures, for example coarse polyurethane foam, and the like.
• a slightly reinforced web such as combined structure of a fibrous web with a network, a woven fabric or a knitted fabric.
• Another alternative which can be advantageous is the use of a substrate in the form of a textile structure or a foam structure.
• Suitable textile fabrics are cotton and woollen fabrics, and suitable "non-wovens" are especially fibrous webs made from natural fibers, and fibers of synthetic plastics material, but also fibers of glass,carbon and asbestos.
• Printing can be effected with all sorts of substances, depending on the final product contemplated. It is not necessary for printing to be effected in a design. It is possible to print the entire surface. Some examples of applications are the binding of a fibrous web, printing a fibrous web in a pattern with a decorative character, decoratively binding a needled web, rendering a substrate water-repellent, or, on the other hand, applying a water-absorbing layer.
• Binders suitable for use in the present invention are lower alkylacrylates, styrene-butadiene rubber, acrylonitrile rubber, polyurethane, epoxy-resins, polyvinylchloride, polyvinylidene- chloride and copolymers of vinylidene chloride with other monomers, polyvinylacetate, partially hydrolyzed polyvinylacetate, polyvinylalcohol, polyvinylpyrrolidone, and the like.
• these binders can be provided with acidic groups, for example by carboxylating them.
• a suitable carboxylating agent is for example maleic anhydride.
• Suitable surfactants are of the anionic or non-ionic type, such as soaps, alkyl-aryl sulfonates, fatty alcohol sulfates , ethoxylated fatty acid compounds and the like.
• foam stabilizers suitable for use in the present invention the following compounds can be used: fatty acid-amide condensates, ammonium- and potassium stearate, cyclohexanole alkylamino salts of acetic acid, formic acid and propionic acid, tertiary amino oxides and the like.
• the fillers to be used in connection with the present invention are the usual fillers for foam printing, and comprise pigments, active components such as carbon black, hydrated alumina, blown silica, etc.
• the particle size of the fillers is preferably at most 20 / um, as the presence of larger particles can interfere with the process of the invention.
• the foam composition is to be converted into a meta-stable foam in known manner, for example, by beating the composition in a high-speed mixer with air or another gas.
• Bonding and dot-printing a web in one pass for making an adhesive interlining are bonded and dot-printing a web in one pass for making an adhesive interlining.
• a fibrous web of 30 g/m 2 consisting of 50% 1.7 dtex, 40 mm viscose fibers, 40% 1.7 dtex, 60 mm polyester fibers and 10% polyester melting fiber having a melting point of 130 o C, is thermofixed with hot air and then printed on a rotary screen machine, by means of a patterned stencil having an open area of 25%, with a quantity of 25 g/m 2 meta-stable foam on the basis of a latex of carboxylated butylacrylate resin having a dry content of 40% and a foam density of 200 g/l.
• the web is printed on the same machine, and in register with the preceding print pattern with dots of a latent adhesive by means of a stencil of a similar pattern but with smaller apertures, so that the open area is now 10%.
• the latent adhesive is a copolyamide solution in p-toluenesulfonamide having a dry content of 30%, which is applied in a quantity of 50 g/m 2 .
• the web is uniformly dried, gelled and cured for 30 seconds at 150°C.
• the registered prints can be applied, as desired, on the same side of the fibrous web or on opposite sides.
• Rotation-screen machines equipped for this purpose are known per se.
• a fibrous web of 50 g/m 2 consisting of 30% 1.7 dtex, 40 mm nylon 66 fibers, 60% 3.3 dtex, 40 mm nylon 66 fibers and 10% fibers 1.7 dtex, 40 mm polypropylen&, is thermofixed and subsequently printed on a rotary screen machine with 75 g/m 2 stable foam on the basis of a latex of soft carboxylated styrene-butadiene rubber having a dry content of 20% and a foam density of 100 g/l by means of a rotation screen with a fineness of 60 mesh and an open area of 45%.
• the fibrous web thus treated is dot-printed with a quantity of 30 g/m 2 of a copolyester solution provided with a foaming agent, having a dry content of 30%, by means of a rotation screen having a fineness of 17 mesh.
• the binder is uniformly dried and hardened in a furnace, and at the same time the printed dots of the latent copolyamide adhesive are foamed and gelled. This heat passage at 150°C takes 40 seconds.
• the product is suitable for use as an interlining.
• the product is dried in a furnace and hardened at 160°C for 2 minutes.
• the product can be used as a suitcase liner.
• a 1.0 mm thick fibrous web of 60 g/m 2 consisting of a mixture of black polyester fiber of 30% 1.7 dtex/40 mm and 60f 3.3 dtex/40 mm and 10% of glossy polyester melting fiber having a melting point of 130°C, is after thermofixation, bonded by means of a rotary screen having an entirely open, i.e. non-patterned, screen area whereby it laden with a quantity of 100 g / m2 of a dimensionally stable foam having a dry content of 30% on the basis of a latex of non-filled, hard, crosslinkable acrylate rubber.
• Foam density is 100 g/l.
• a 2.0 mm thick white polyester fibrous web consisting of a mixture of 30% 5.0 dtex/50 mm, 40% 17.0 dtex/80 mm and 30% 3.3 dtex/40 mm, with 40% of the kind last-mentioned consisting of a melting fiber having a softening range of 160-220°C is, after fixation at 220°C, printed by means of two immediately consecutive rotary screen passages.
• the second screen is patterned with 20% free apertures of the screen area and prints the substrate in registry with the pattern of the first screen, namely, on the still open substrate portions.
• This is effected by means of a dimensionally stable foam containing 100% epoxy resin and having a foam density of 200 g/l, in a quantity of 100 g/ m 2 .
• the product is o substantially dried at 150 C for 2 minutes and then subjected to after-drying and hardening at 140°C for 1 minute.
• the product obtained cannot be crushed, and can be used as a flexible spacer for lamination.
• a polyester fibrous web of 40 g/m 2 consisting of 90% 1.7 dtex/40 mm and 10% 1.7 dtex melting fiber having a melting point of 130°C, and having a ratio in tensile strength in the longitudinal and transverse directions of 5:1 is provided by means of a rotary screen with a continuous top coating of 115 g/m 2 of dimensionally stable foam on the basis of polyvinyl alcohol solution in vinylacetate, having a dry content of 40%, with 30% of the dry matter consisting of super-absorbent acrylate powder.
• Foam density is 150 g/l.
• the same side of the web is provided with a dose of 1C g/m 2 of an instable, thickened foam, having a dry content of 10%, and a foam density of 200 g/l, on the basis of a solution of benzotriazole in ethanol.
• the product is dried and hardened at 50 0 C for 1 minute.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Coloring (AREA)
• Laminated Bodies (AREA)
• Printing Methods (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

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Publications (3)

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ID=26157687

Family Applications (1)

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Cited By (4)

Citations (1)

• 1984
  • 1984-12-10 EP EP84201823A patent/EP0184596B2/de not_active Expired - Lifetime

Patent Citations (1)

Non-Patent Citations (2)

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