Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
  • D06N7/00—Flexible sheet materials not otherwise provided for, e.g. textile threads, filaments, yarns or tow, glued on macromolecular material
  • D06N7/0005—Floor covering on textile basis comprising a fibrous substrate being coated with at least one layer of a polymer on the top surface
  • D06N7/0007—Floor covering on textile basis comprising a fibrous substrate being coated with at least one layer of a polymer on the top surface characterised by their relief structure
  • D06N7/0013—Floor covering on textile basis comprising a fibrous substrate being coated with at least one layer of a polymer on the top surface characterised by their relief structure obtained by chemical embossing (chemisches Prägen)

Definitions

• the invention relates to a method for producing a substrate provided with a foam print, the printed surface of which is covered with a wear layer, the method first comprising the production of an intermediate product which consists of a substrate lying thereon by means of There is a heat effect of foamable printing ink and a covering, thermoplastic wear layer, and further the heating of the intermediate product at least in the area of the printing ink, the printing ink foaming and the wear layer conforming to the resulting contours of the foamed printing ink, and then allowing to cool.
• DE-A-29 15 136 discloses a method of the type mentioned at the outset, in which the wear layer is applied as an additionally coated, transparent layer before foaming, for example made of PVC by means of returning rollers.
• this wear layer is very difficult to apply uniformly and thickly. Your order also requires a high level of mechanical effort, which cannot be realized in medium-sized printers. Nor can the wear layer itself serve as a pressure carrier.
• thermoplastic film in the production of the intermediate product mentioned, either a thermoplastic film is placed on a printed substrate or a printed thermoplastic film is applied to the substrate and pressed on without bubbles , in both cases the film has a softening point in the range of the elevated temperature required for foaming, further that the printing ink and the film are then heated, the film also at least partially softening in the heated state and a continuous, the contours of the Printing ink results in the following wear layer.
• Suitable foils are, for example, laminating foils with a thickness of 5 to 25 micrometers, which can be selected, for example, from the group of thermoplastics, polyethylene, ethylene-vinyl acetate copolymer, polyvinyl chloride or polycarbonate.
• the substrate is first printed and then the unprinted film is placed on it and made to adhere.
• the latter can be done in particular by using an air-impermeable film, but the substrate is air-permeable or is made air-permeable by perforations.
• the film is made to nestle by means of a vacuum applied below the substrate. However, it is also possible to electrostatically charge the film or the substrate so that the film presses onto the substrate.
• the printed film and placed on the substrate in the non-foamed state of the printing ink.
• the printed image must of course be mirror-inverted.
• the pressure can be assisted by means of a vacuum or by electrostatic charging.
• processing takes place in a temperature range from 120 to 170 ° C.
• the heating can be carried out by hot air, by infrared radiation or also by microwave radiation if, as is common in many cases, the foamable printing ink contains water.
• the product resulting from the method can be, for example, a raised printed spine, a packaging film or a wallpaper.
• Relief maps, souvenirs or toys can be produced.
• the substrates can be selected from a large product group, for example made of paper, cardboard, linen, textile raw materials, synthetic fiber fleece or felt. Fabrics with a dense surface, such as wood, metal, glass or high-melting plastics, can also be used. In general, experience with printing foams can be used in general.
• Figure 1 shows the process step before applying the film to a printed substrate
• FIG. 2 shows the method step before applying a printed film to an unprinted substrate
• Figure 3 shows the view of the finished product according to the method.
• Example 1 (see FIGS. 1 and 3):
• a slightly porous piece of linen 1 for a book cover provided with stiffening equipment is printed with an acrylic foam ink in the usual screen printing process (printed image 2).
• a very thin, thermoplastic film 3 made of polycarbonate with a thickness of 15 micrometers, which is thinly coated with an adhesive 4 is placed on the substrate and the still very flat printing ink and pressed flat with a roller.
• the substrate with the film is then placed on a vacuum table 5, which generates a negative pressure of approximately -0.1 bar in the region below the substrate. The resulting negative pressure pulls the film onto the substrate so that it clings to the entire substrate surface without bubbles.
• Foaming under elevated temperature warm air, in a range of approximately 120-170 C.
• the film has its softening point in this area.
• the printing ink foams and then takes up an increased volume under the film. Stiffens after cooling again Gas bubbles or faults are not observed at a temperature of 120 - 170 and a processing time of approx. 15 minutes.
• Example 2 (see FIGS. 2 and 3):
• a thin laminating polyvinyl chloride film 13 with a thickness of 20 micrometers is printed in a multi-color mirror-inverted manner with foamable printer ink (printed image 12).
• the film is then placed on a perforated paper and cardboard surface 11, the smearing of the printed image being carefully avoided.
• a negative pressure on a vacuum table 5 the previously lying one with pressure-sensitive adhesive coated film reached on the substrate.
• the substrate and film are removed from the vacuum table and "baked" at a temperature of 160 and 170 C, ie the printing work is foamed.
• the product can, for example, be folded and glued accordingly as part of a package.
• a transparent film made of ethylene-vinyl acetate copolymer with a thickness of 25 micrometers and a format of 60 x 30 cm is printed with a non-foaming and a foaming, water-based ink to about 10% of the area.
• a plastic plate made of a polyamide material is evenly electrostatically charged by rubbing. The printed film is put on. Due to the electrostatic charge, it is pressed evenly onto the surface.
• the foaming paint is heated to approximately 125 ° C. by means of known microwave heating units, as are known, for example, from canteen kitchens, whereby it expands in the space between the film and the substrate surface and also the film in the contact areas Softening and stretching brings. After the foaming process, which takes about 5 to 10 minutes, the film and substrate are dried again with warm air at about 120. The film melts slightly and sticks to the surface of the substrate. After cooling, the product is ready for immediate use.
• Example 4 Example 4:
• a metal e.g. B. aluminum, or wood, z. B. plywood
• a printed film as described in Example 3, wear-resistant patterns.
• films made of other materials for example polyethylene, polyvinyl chloride or polycarbonate or polymethacrylate, which are generally referred to as "thermoplastics".
• the printed film is placed on the surface of the substrate and heated with the aid of infrared lights until the printing ink is foamed, which happens, for example, in a range from 150 to 200 ° C. At the same time, melting of the film on the substrate can be observed.
• the film therefore acts as its own adhesive with respect to the substrate. After complete foaming, post-drying and cooling, a product with a continuous pressure and wear layer results.
• glass, ceramic materials and high-melting plastics can also be printed.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Laminated Bodies (AREA)
• Printing Methods (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6259516

Family Applications (1)

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Cited By (1)

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Citations (4)

Family Cites Families (3)

• 1985
  • 1985-01-10 DE DE19853500552 patent/DE3500552A1/de active Granted
• 1986
  • 1986-01-07 WO PCT/EP1986/000004 patent/WO1986004100A1/de not_active Ceased
  • 1986-01-07 EP EP19860900757 patent/EP0208751A1/de not_active Withdrawn

Patent Citations (4)

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