DE4124565A1 - Printed paper imitating wood - involves taking photograph, prepn. of lithographic mask plates and printing - Google Patents

Abstract

The furniture surface to be imitated is photographed and the resultant photograph is broken down selectively into various colours. Lithographic mask plates are then prepared, the quantity of which equals the number of colours involved. The mask plates are used in a lithographic process to print on paper which before and after the printing stage is chemically treated. The printed paper is then adhered to a baseplate, and its surface is varnished. The paper used comprises cellulose and wood paste, and has a specific wt. of 50 to 200 g/m2. USE - To produce decorative paper covers imitating the pattern and colours of fine wood surfaces, for use in the furniture mfg. industry.

Description

The present invention relates to a method for the production of decorative coverings, in particular Paper coverings, the differently processed or decoration rative wood surfaces for the furnishing industry imitate.

For the production of furniture with semi-finished panels (e.g. Chipboard or plywood panels) are known processes where the boards imitate the veins of precious woods decorative paper.

The decorative paper is usually produced by that paper made of cellulose and wood paste first one Rotogravure is subjected to the Color and the veins of a precious wood (e.g. walnut) on the Imitation surface, and then an impregnation Process with acrylic and melamine resins. The pa pier is impregnated with the resins in such a way that it Properties such as tightness, strength, elasticity and Dimensional stability, which for the subsequent Be action steps, d. H. for the adhesive connection with the  Base plate (which is usually made of wood or wood substitute stands) and the final painting are necessary.

The paper printed and impregnated in this way is then opened the base plate is glued and painted for protection.

As is known, the gluing step can either be carried out cold stood with vinyl resins or in warm condition with warm melting or thermosetting adhesives.

The main disadvantage of this manufacturing process is in using a rotogravure process. The high cost of the facility and the preparation of the Masks justify the use of this printing process only in the case of long runs.

The supplier of printed paper is thus forced to to keep significant stocks of decorated paper in stock, so that he can satisfy every demand from furniture manufacturers can, which in turn are forced to load quantities of paper places that are greater than production-related needs are.

This causes paper waste because paper doesn't is used, or furniture is made, that are unlikely to be sold.

Another disadvantage of the conventional method is in that the manufacturers of furniture with special Styling (e.g. inlaid furniture) is just an inadequate pro production flexibility is offered.

There is only a limited amount of demand for furniture or for different types of furniture.

The constraint that one is large, using rotogravure printing Having to order printed quantities of paper prevents the furniture manufacturer to adapt their production to the change stagnant market demand.

The main object of the present invention is half in it, a method of making To create decorative panels that are practical and the flexibility of the production of the decorative paper as well as the furniture or the like covered with this paper improved;  the quality of the paper and therefore of the furniture should be just if improved.

Another object is a manufacturing process drive the above type to create the manufac of furniture with special styling enables quickly and without storage or wasted storage would advise any demand for furniture offered in the catalog to satisfy.

These and other tasks are handled by a process solved, comprising the steps according to the claim.

The advantages and the steps of the Her invention The appointment procedure is described with the help of the following Be description of a non-restrictive design form better understood, which relates to the manufacture of decorative paper for reproducing inlaid furniture pulls.

The paper used in this process consists of cellulose and wood paste and has a specific weight of 50 to 200 g / m ² .

As is known, the paper undergoes an impregnation process with predetermined amounts of urea resins, acrylic resins and subjected to melamine resins so that it has the properties has that for sticking on the to be clad Base plate and the subsequent painting step necessary are.

With such impregnated paper, it will Exudation of the adhesive, especially urea and Avoid vinyl glue that can be used without the subsequent print image being created later is damaged.

In addition, this impregnates with the said resins gn paper on a strength that allows the Pa pierced onto the base plate in warm condition by the users of presses heated to relatively high temperatures to stick; the sticking of the adhesive between paper and base plate as well as the lacquer coating on the  The paper viewing surface is influenced favorably.

After this step, the paper is for the printing step finished.

The method according to the invention sees a lithograph pressure instead of a conventional rotogravure which has the disadvantages mentioned above.

Therefore, the surface to be imitated (e.g. the door of an inlaid piece of furniture) photographed so many times how to select colors available by using a fil between the surface and the lens every time ter whose color is complementary to the primary color, which is to be selected.

You can choose to take a single picture, the un is examined and then disassembled by a test device that the optical signals into electrical signals, d. H. Light inks realizes. These values processed considerably can be viewed simultaneously on the four films of the Four-color printing projected so that the image so reprodu is decorated as it was read or processed.

The image positives that the archetype in black and white reproduce at least the three primary colors, then how known, on the associated mask plates made of zinc or Aluminum applied for lithographic printing.

To check the fidelity of the reproduction, be Experiments made with a printing press that serve this purpose determine whether the color ratios are correct.

If the correct color ratios are reached, the mask plates mounted on sheet printing machines for Print in the desired edition.

The printed paper is then on the one to be clad Glued base plate made from any semi-finished product made of wood (e.g. a chipboard, plywood board or the like); after that the visible surface painted until it is the same as the surface to be imitated is.

From the above, the benefits of  method according to the invention can be seen.

The lithographic finds expedient and economic Printing process application, even in the case of relatively small editions of any recorded product.

The manufacturing process described enables the Pa pier suppliers and the furniture manufacturer, the production organized in such a way that any market demand quickly, with compared to the rotogravure process freeze lower costs and without wasting material is damaged. In addition, the quality of the reprodu adorned products much better than those of conventional products Chen products. Decorative surfaces can be made that are so similar to the surfaces to be imitated are that you can hardly distinguish them. Furthermore, one diverse, free stylistic execution already in the Development phase possible because of the plan and the decorations the surfaces of the designed furniture can be changed freely can.

The decoration produced with the method according to the invention rative disguise can also be used to others To dress documents from the mentioned base plate are different for furniture, e.g. B. Base areas made of art fabric, metal, glass or other suitable materials; other equipment can also be manufactured, that differ from the facility mentioned, without to leave the scope of the claim.

Claims (1)

Process for the manufacture of decorative cladding, in particular paper cladding, which imitie machined or decorative surfaces made of wood for furnishing furniture, characterized in that

• - The surface to be imitated is photographed so that the captured image can be selectively broken down into the various colors;
• - as many lithographic mask plates are prepared as the colors were taken from the picture taken,
• - The mask plates are used in a lithographic process for printing on paper which is chemically treated before or after the printing step in a manner known per se;
• - the printed paper is glued to an assigned base plate; and
• - the visible surface of the printed paper is painted.