FR2665117A1 - PROCESS FOR PRODUCING DECORATIVE COATINGS FOR DECORATING FURNITURE - Google Patents

Abstract

Process for manufacturing decorative coverings, in particular paper coverings, reproducing worked or decorated surface lines, for decorative furniture. The process is characterized by the following phases: - photography of the surface to be reproduced; obtaining as many lithographic plate matrices as there are colors selected from the photographed image; - Printing by means of a lithographic process of said plate matrices on chemically treated paper in a known manner; - gluing of the drawn paper on a corresponding support panel; - application of a transparent varnish, of the visible surface of the drawn paper.

Description

2665117-

  1 'Method of manufacturing decorative coatings for

decorative furniture -

  The invention relates to a process for the production of decorative coatings, in particular a method of manufacturing coatings on paper reproducing worked or decorated surface lines, for the decorative furniture industry. The process of making furniture with semi-finished panels (for example in Frisian or plywood), coated with decorative papers that reproduce the veins of the species, is known.

valuable wood.

  Typically, the decorative paper is made by subjecting paper, of the cellulose type and wood pulp, to rotogravure printing processes, to reproduce on its surface the color and veins of a precious wood (eg walnut) Thus, impregnation processes with resins, acrylic and melaminic resins These resins are applied to the paper, in amounts to give it the characteristics of compactness, strength, malleability and indeformability necessary for the successive operations of bonding to the support panel (normally made of wood or substitutes), and

final varnishing.

  The paper thus drawn and impregnated is subjected to the bonding operation on the support panel, and

then to the protective varnish.

  The bonding operation, as also known, can be carried out, either cold with vinyl resins, or by hot processes, with adhesives of the type

thermofusible or thermosetting.

  The main drawback of this manufacturing process lies in the system used which, as we know, is

the one with rotogravure printing.

  Indeed, the high costs of installation and preparation of the dies do not make appropriate the use of this system of printing for high draws. This is why the supplier of pulled paper is embarrassed to prepare large stocks of variously decorated paper, to be able to meet all kinds of demand of furniture manufacturers who, for their part, are forced to protect themselves in paper drawn in greater quantity by compared to their actual productive demands. All of this inevitably results in waste of paper, which remains unused, or in the manufacture of

  amount of furniture that may remain unsold.

  Another disadvantage of the conventional process derives from the insufficient productive flexibility, which is offered to furniture manufacturers with strong characterization.

  stylistic (such as inlaid furniture).

  In fact, these manufacturers are subject to a market demand that, in addition to requesting a limited amount of furniture, does so with a different distribution on

different furniture models.

  The inconvenience of having to pre-order a large quantity of rotogravure paper therefore prevents the furniture manufacturers from adapting their production to the demands

unstable market.

  This is why the main object of the invention is to provide a method of manufacturing decorative coatings which improves the rationality and flexibility of production, both for decorative paper, furniture or the like that paper will take, as well as to improve also the quality of said paper, and therefore

  furniture achievable with this one.

  Another object of the invention is to provide a manufacturing process of the type thus mentioned, which allows furniture manufacturers with a strong stylistic characterization to satisfy, immediately and without suffering the immobility and inconvenience of inventory. in store, any kind of demand for furniture models planned in their production. This and other objects are achieved by the process of manufacturing decorative coatings, in particular for the manufacture of coatings on paper, reproducing variously worked or decorated surface lines, for decorative furniture, by understanding the phases below: photograph of the surface to be reproduced, so as to be able to selectively separate the colors that make up the photographed image; obtaining as many lithographic plate matrices as colors selected from the photographed Timing; lithographically drawing said matrix plates on said chemically treatable paper, also in a manner known per se, before or after the printing; gluing the paper pulled on a corresponding support panel; application of a transparent varnish on the surface

visible from the drawn paper.

  The advantages and characteristics of the manufacturing method according to the invention will be better understood

  thanks to the description below with reference, to

  By way of example and not limitation, in the manufacture of decorative paper for the reproduction of inlaid furniture The paper used for this process is generally of the cellulose and wood pulp type, a

  weight between 50 and 200 gr / m 2.

  The paper is also known to be impregnated with a predetermined amount of urea, acrylic and melaminic resins, capable of imparting to it the characteristics necessary for the gluing phases on the support to be coated, and for subsequent coating. Indeed, the paper thus impregnated prevents the transudation of the different types of glue (especially urea and vinyl), which can be used for the

  collage, avoiding the alteration of the

  above, which will be done next.

  In addition, the impregnation with the mentioned substances gives the paper a resistance, which enables it to pass without damage the bonding operation on the support, particularly by means of thermoadhesives, for which presses heated to relatively high temperatures are used. , and promotes both the adhesion of the glue between the paper and the support, that the adhesion of the

  clear varnish on the visible surface of the paper.

  After this, the paper is ready for the printing operation. It should be noted that the method according to the invention provides for a lithographic-type print in place of the conventional rotogravure printing with

disadvantages described above.

  This is why a photographic recording of the surface to be reproduced (for example the door of an inlaid piece of furniture) is made, according to a number of times corresponding to the colors that one wants to select, and interposing, in turn, between it and the lens, a complementary color filter of the primary color

we want to select.

  Alternatively, a single color photograph can be made, which is then explored and decomposed by an analyzer apparatus, which converts the optical signals into electrical signals, and thus into light values. Finally, these values, which can be substantially manipulated, are projected at the same time on the four quadrichromy films, thus reproducing the image as it was

read or manipulated.

  The film or photolith in positive, which reproduce the original in black, and at least three primary colors, are transferred in a known manner to the corresponding matrices made of zinc or

  aluminum, for lithographic printing.

  In order to check the fidelity of the reproductions, press proofs are used to establish if, compared to the original, the proportions of the different

colors are accurate.

  Once the desired chromatic ratios have been obtained, the plate matrices are mounted on cylindrical sheet or coil machines, in order to print in the desired edition. The drawn print is thus glued to the support to be coated, which may be constituted by any product. semi-finished wood (such as fries, plywood or the like), and subsequently subject to the varnishing of its visible surface, until it becomes

  likely to be confused with the original to reproduce.

  As a result of the above described advantages of the manufacturing process according to the invention are evident. Indeed, the lithographic print lends itself to performing, rationally and economically, also limited editions of any photographed subject. The described manufacturing process also enables the paper supplier and the furniture manufacturer to organize their respective productive activities, so as to satisfy, with speed, with significantly reduced costs compared to the rotogravure system and without waste of materials. , all kinds of demand from the market, the quality of reproduction is also significantly better compared to that achievable with conventional systems, to a level where we can obtain reproductions that allow to perform surfaces decorated with way so analogous to the original, that they are hardly recognizable in relation to this one, indeed, already in the phase of project, one can obtain an ample and free elaboration stylisatrice and execuer, while being able to vary at will , both the drawing and the

  surface decorations of the furniture in project.

  Obviously, the decorative coating obtained by the method according to the invention can be used to also coat different supports from the one described, such as, for example, plastic, metal, glass or any other suitable material, or to make components decorations different from that described, without departing from the field of characteristics

main features of the invention.

Claims (1)

CLAIM   Process for the production of decorative coatings, in particular for the manufacture of coatings on paper, reproducing differently worked or decorated surface lines, for decorative furniture, characterized by understanding the following phases: photograph of the surface to reproduce, so as to be able to selectively separate the colors that make up the photographed image; obtaining as many lithographic plate matrices as colors selected from the photographed image; lithographically drawing said matrix plates on said chemically treatable paper, also in a manner known per se, before or after the printing; gluing the paper pulled on a corresponding support panel; application of a transparent varnish on the surface visible from the drawn paper.