FR2483327A1 - METHOD FOR MANUFACTURING COLORED MATERIAL AND COLORED MATERIAL OBTAINED THEREBY - Google Patents

Abstract

The invention relates to dyeing-finishing techniques for textile products. The method forming the subject of the invention is of the type consisting in applying to one of the faces of a continuously moving strip a color printing paste, then passing said strip between two rollers in order to distribute the paste. printing over the entire width of the strip, and then drying the latter, and is characterized in that during the movement of the strip 1 between the rollers 4 and 5, one obtains, simultaneously with the distribution of the printing paste along the width of said web, printing along the width of said web, printing of the desired design by means of one of the rollers, which acts on that of the faces of the web 1 which is opposite to that on which the printing paste is applied, and on the surface of which is fixed the design corresponding to the design to be obtained on the tape. The invention applies in particular to obtaining printing supports, by thermography, of textile products bearing designs in contours on a single-color, multicolored or polychrome background.

Description

The present invention relates to the dyeing and

  finishing and particularly relates to a method of manufacturing colored materials and a colored material obtained by said method, such as, for example, a support for the thermographic printing of textile products bearing outline drawings on a

  unicolour, multicolored or polychrome background.

  The field of use of this process is practically unlimited. According to the dyes used, it can be used to obtain a support for the thermographic printing of various textile materials, in the manufacture of paper or wall fabrics or upholstery, film coatings drawings, in the manufacture of curtains of windows, tapestry materials and others. The process can be used also in the graphic arts. A method of manufacturing a colored material, for example a support for printing textile materials, according to which a coloring image is applied to the support by means of flat or rotary frames, by a typography method, by intaglio, offset or flexographic printing (see, for example, French Patent No. 2,261,882, class B41M 3/12, 1975, British Patent No. 1,295,634, D 06P 1/16, 1972) or by frame printing ( British Patent No. 959,315 B6C, 1954). Then, the support is dried and the pattern is thermographically transferred onto the material. These methods make it possible to obtain

  the textile material a drawing with sharp outlines.

  Also known is a method for producing a colored material, for example a support for thermographic printing of textile materials, according to which, on a strip or web of support in continuous movement, is applied from above a thickened printing paste, after which the support passes between two rollers to distribute the paste over the entire width of the strip and is then dried (see for example the USSR author's certificate No. 808569,

Cl. D 06P 5/00, 1979).

  We thus obtain on the support an effect of

polychrome coloring.

  This method of manufacturing the support is very simple and inexpensive, but offers only limited possibilities with respect to the drawings that can be obtained, because a drawing is formed only of stripes of different colors, which are either clearly defined,

  have no definite geometrical shape, or which

  pose in an undetermined order of succession,

  only in the form of separate spots.

  The polychrome drawing may be modified or supplemented by additional treatment of the printed medium before or after drying, by means of an engraved roll or frame with or without the use of a quantity of printing paste - additional (see for example the French patent Nu 2 144 836, D 06P7 / 00, 1973M However, in this case, the manufacture of the colored material becomes more complicated

and more expensive.

  The present invention thus aims at a material and a method for manufacturing the latter with a drawing resembling a color-etched pattern, by obtaining clearly determined drawings in length and width of the strip, without complementary treatment thereof with printing pastes using an engraved roll

or a frame.

  The problem thus posed is solved by means of a method of manufacturing a colored material, according to which a printing paste is applied to one side of a strip or sheet in continuous movement, then this strip is passed through. between two rollers for distributing the printing paste over its entire width, after which it is subjected to drying, this method being characterized, according to the invention, in that during the movement of the strip between the rolls, it is created on this simultaneously with said distribution, of the paste, the printing of a determined pattern by means of that of said rollers which acts on the side of the strip opposite to that on which the paste to be printed is applied, and on the surface which is fixed the drawing to reproduce on

the band.

  The drawing can be made of any suitable material and is fixed to the surface of the roll in a specified repetition step and order of succession, or it can be fixed on the roll a

  material in which is cut the desired design.

  Such a method makes it possible to obtain small and / or large area drawings, in a determined order of succession and over the entire length and width of the material. In addition, it makes it possible to obtain half-tints and to preserve the effect of gradual transition from one color to another which usually characterizes intaglio printing. At the time of distribution (or crushing) of the printing paste between the rolls, the pressure applied to the tape is different, and where the drawing is attached to the roll, thanks to the greater thickness resulting the applied pressure is stronger (or lower, depending on the design used). Consequently, on the part of the strip which corresponds to the drawing, the printing paste is deposited in a smaller quantity than on the parts without drawing which constitute the bottom (the said quantity being all the smaller as the thickness of the drawing is larger), so that an etching effect is obtained, the background and the drawing being

obtained simultaneously.

  The method of the invention can be implemented using a simple and inexpensive equipment and can move quickly and easily from one drawing to another with reduced costs and in a minimum time , the drawings may have a character as well

graphic than pictorial.

  Thanks to the manufacturing method according to the invention, on the colored material in the form of a strip 35 with a colored surface bearing a drawing, the drawing may have a contour that is either dark or light, and the color of the drawing and of the background of the band can be the same, but of different intensity. In this way, the entire length and width of the colored material is obtained with a determined pattern of great sharpness, close to a etched pattern, and if the method according to the invention is used, for example, to produce a support for Thermographic printing of textile materials, a material can be obtained with a design which can not be obtained by thermographic printing from a manufactured paper support

by known methods.

  The invention will be better understood and other purposes, details and advantages thereof will appear better in the

  light of the explanatory description which will follow from

  various embodiments given solely by way of non-limiting examples, with references to the appended non-limiting single drawing and in which: FIG. 1 illustrates the implementation of the method according to the invention in the particular but nonlimiting case of the manufacture of a support for the thermographic printing of textile materials; FIGS. 1a and 1b illustrate exemplary embodiments of the drawings on one of the rollers used

  for the implementation of the method.

  A support band 1 (FIG. 1) obtained by a known method and taking place from a drum 2 passes continuously between guide rollers 3, for example at a speed of 1 to 20 m / min, between two rollers 4 and 5 arranged one above the other and resiliently pressed against each other with an effort of, for example, 9.8 kPa,

  after which the strip arrives in a drying chamber 6.

  A color-in-ink print-out of a dispenser 7 is applied to one side of the continuously moving media strip 1. For example, a known thickened printing paint of the following composition is used: 35. dispersed blue K-40 g urea 100 g water 200 g thickener x 1-000 g At the same time, printing pastes can be applied. other colors and get that way

a multicolored band.

  To obtain over the entire width and length of a single-colored or multi-colored support strip a determined pattern, the drawing 8 is fixed on the surface of the roll 5 acting on the support strip on the side opposite to that

  on which the printing paste is applied.

  The drawing 8, as shown by way of example in FIG. 1a, may for example be cut according to contours in a sheet of writing paper or Whatman paper, or in any other desired material, and is fixed (for example , glued) on the surface of the roll 5 according to a determined repetition step and order of succession, for example using glue zous form a

  thickener at 4% methylcellulose.

  However, the drawing 8 can be cut out of any material 9 and this material can be fixed (glued) to the surface of the roll 5, thereby obtaining

a printing stencil.

  During the passage of the support strip 1 between the rollers 4 and 5, the printing paste is distributed over the entire width of the strip and at the same time a printing of the required pattern, corresponding to that fixed, is obtained.

by roller 5.

  At the time of the distribution of the printing paste according to the width of the strip, thanks to the drawing attached to the roller, different pressures are created between the rollers (the clamping force applied to the rollers being for example 9.8 kPa). In the places where the thickness is determined because of the increased thickness resulting from it,

  the pressure is higher, so that the paste of impres-

  is applied in smaller quantities to the corresponding parts of the support strip than to the substance

  35. (especially as the thickness of the drawing is greater).

  In this way, an etching effect is obtained, the background and the drawing being obtained at the same time, but with a

different color intensity.

  According to the part of the drawing that was cut,

  can get a darker or lighter color.

  The colored support strip carrying the printed pattern passes through the drying chamber 6, where it is dried at 100.degree. C., and then between the guide rollers 10 before reaching the pair of rollers 11 which coincide with the support strip 1 and the textile material 12, for example a polyester strip, for the subsequent transfer of the dye from the support strip 1 to the textile material 12 in a shell 13 for 30 seconds at the temperature of 2001C. Then, the colored fabric rolls up into a roll 14, and the used support strip,

in a roll 15.

  In this way, the process according to the invention makes it possible to obtain a colored material, for example a support for the thermographic printing of textile materials, of paper or wall fabrics or upholstery, of drawn film coverings, etc. This support has a colored surface carrying along its entire length a same drawing with dark or light contours, said drawing and the bottom of the support being of identical color but of different intensity. Thus, when a drawing, for example that of a maple leaf, is cut in a half Whatman paper (a thickness of 0.24 mm) and is stuck on the roll, and that the dough of The printing used is that indicated in the example described above, and on the support, according to the pressure created by the rollers, a blue background is obtained and

  30. maple leaves almost white or blue in color

clear with dark or light outline.

Claims (4)

R E V E N D I C A T IO N S   1.- A method of manufacturing a colored material, of the type consisting in applying to one of the faces of a continuously moving strip a color printing paste, then passing said strip between two rollers to distribute the printing paste over the entire width of the strip, and then drying it, characterized in that during the displacement of the strip (1) between the rollers (4) and (5), one obtains simultaneously with the distribution of the printing paste according to the width of said strip, an impression of the desired design by means of one (5) of the rollers, which acts on that of the faces of the strip 1 which is opposite to that on which the printing paste is applied, and on the surface of which is fixed the drawing (8) corresponding to the drawing to get on the band.   2. A method according to claim 1, characterized in that the drawing (8) is cut from any material (9) and is fixed to the surface of the roll (5) in a step of repetition and in a determined sequence of succession . 3. A process according to claim 1, characterized in that on the roll (5) is fixed a material (9) in   which is cut out the drawing to reproduce on the tape.   4.- Colored material obtained according to the process   according to one of claims 1, 2 and 3, and   presenting in the form of a colored surface strip bearing a pattern, characterized in that the pattern reproduced on the ba (1) has dark or light outlines, and that the drawing and the bottom of the strip are likewise   color, but of different intensity.