DE1453243A1 - Process for the production of veneered and surface-treated panels - Google Patents

Description

Mainz / Rhine, the -t ρ ρ

Poibchecfc: Frankfurt / Main 19058 .... Adam-Karrillon-Strasse 30

Ludwigshcrfm 22466 f —— «——— ·." - "«. "» ,, .. ",.« "

Dresdner Bank Mainz

_LH . _No. _6 5 ο 126

Dr. J

4453243

Je Heilmann, Mainz / Ehe Auf dem Albansberg 7 <

^M Process for the production of veneered and surface- treated boards " _a

Carrier plate !! such as chipboard, paser, veneer, barrier, as well Plasterboard and the like * are used for various purposes generally veneered and surface-treated in a subsequent second operation Before the surface treatment, the panels are air-conditioned, sanded and dusted. »As a rule, veneers and Surface treatment are two fundamentally different operations that can be carried out with the help of various machines. "

The object of the invention eliminates the previous disadvantages ^ that first the veneer and the surface treatment are carried out in one operation. For this purpose, the veneers are coated with an appropriate, commercially available urea-formaldehyde synthetic resin _{glue (Kaurit t} Kantal, Dynorit) impregnated and dried on both sides "These dried, impregnated veneers can be stored for a certain period of time without the resin hardening prematurely. The veneers can be cut to size before or after impregnation." Use of a further binding agent, pressed with the carrier plate in a few seconds and can be removed from the press without recooling and stacked for cooling and air conditioning tahlbleche or "sand-blasted, and nickel-plated brass plates) chrome generated" depending on the amount and adjustment of the resins of the surface effect Tariierbare Β§ ^ οδ is | £ ^λ η β Θ ΐιι resin coating a surface with open PorenVund a rich resin coating results in a closed

909804/0551 ^ne

Surface that is resistant to boiling water, all organic solvents, weak acids and alkalis and has the other properties of a plastic laminate plate <,

The plate produced by this process can be im Furniture-.? Can be used indoors, as well as prefabricated houses and derglo *

The impregnation of the veneer is carried out, for example, in a simple way by soaking it in a urea-formaldehyde synthetic resin bath, followed by drying evaporated water are carried out .. There are various tlöglichkeiten the drying of the resin _o in forced drying the temperature must a certain maximum temperature does not exceed so early curing of the resin is not .eintritt _a the pressing of the impregnated veneers to the carrier plate takes place in a hydra bluish hot press at a press platen temperature of about "I5o ° -. 18o ° C and the corresponding maximum pressure the carrier plate (. particleboard _o ca 20 kp / cm, fiberboard up to £ $ 45 kp / cm) within a few seconds' (The pressing time varies depending on the veneer thickness and press platen 6-30 seconds, Ca ₀ 30 s / mm) "This short pressing times set course a corresponding short press-closing time" open time "dolu as short as possible in the press ahead" Each end of the pressing time the press can be opened and the workpiece removed and stored for air conditioning »Back cooling of the press plates, as is absolutely necessary with processes that have already been used, is not necessary here * *

In this method, it is also possible to veneer, the carrier plates on one side only without a hollow pulling the plates to be feared "For this purpose must, depending on the disc type, the rear moistened or do not heat" the latter can Asl so performed v / ground that two carrier plates with the backs are pressed against each other at the same time. " To compensate for fluctuations in the thickness of the carrier plates, a rubber blanket can be placed between the two plates * Use the same procedure

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carrier boards can only be veneered without treating the surface at the same time «. Synthetic resin can do that be placed on the carrier plate or on the veneer «. The one-sided veneer of the carrier plate is here also possible pur this procedure can both Wood veneers as well as decorative papers or thin fabric mats be used*

The surface coating without the use of a Veneer is also possible, the urine being off -formaldehyde synthetic resin can be set to be clear or pigmented in color «, the resin is applied directly to the carrier plate ο

Furthermore, it is provided that the process "eliminates the ^{need to use the press and transport plates, especially in the manufacture of} laminate panels, plastic composite panels and dergloo". veneers, G-ewebematten and derglooder plastic films are placed on transportable press plates using this retracted into the press and pressed together under pressure and heat, "in this case, the surface effect of the plate to be produced is determined by the surface of the press plates _β the press plates are for high-gloss surfaces mostly from Chrome-nickel steel and, in the case of matt-finished surfaces, made of chrome-plated and nickel-plated sheet brass and only have a limited life or service life. These sheets are heated with each press cycle and then cooled back to the _{above »50 ° - 60 ° 0 by cooling the press or in a special cooling channel} Cooling down the press »w As an enormous amount of heat energy consumption and an unnecessary expenditure of time is not necessarily used in every case, but cooling of the sheets is also necessary in this case

This method requires a large number of press plates, as well as a transport line and a cooling station for the sheets, which is a significant cost factor * a «) due to the investment costs

b.) due to the constant consumption of heat energy to heat the sheets during the press cycle » _§AD ofü @ If * AL

9098üA / 0551 - 4 ~

ο ») Due to the wear and tear on the press plates, which is usually a own chrome plating facility required at night *

This disadvantage becomes in the further course of the invention eliminates the fact that a plastic film is used instead of the press plates, which are used several times for pressing can and which has the property, neither on the stationary press plates of the press nor on the synthetic resin surface to be glued on

After pressing, the film adheres slightly to the synthetic resin surface from which it can be removed after pressing or only at the customer's. The film can thus at the same time serving as a protective film for storage and shipping One-day heating press with two stationary press plates is the most advantageous. The film is the top layer placed on the impregnated veneers, papers, mats, PVC or polyethylene foils to be pressed and put everything together pressed · To achieve the desired surface effect, the film has a matt or high-gloss surface Foil is expediently transparent, so that a visual inspection of the surface is possible after pressing, if the plate is to be shipped with the foil as a protective foil «

The use of this compression film is also for the compression of polyvinyl chloride (PVC) and polyethylene films and the like. possible as a surface material for panels. When using this press film, the shortest possible press times reached at the corresponding pressing temperature after the pressing process, the plates are without recooling of the press removed from the press when hot and stored stacked for air conditioning ·)

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Claims (1)

- 5 claims / 1 ·.) Process for the production of veneered or »surface-treated Panels, characterized in that the veneer to be applied to the carrier panel in a urea-formaldehyde-synthetic resin bath impregnated virrt and after drying in one Press under pressure and heat nit the carrier plate is pressed, whereby the urea-formaldehyde plasticized, filled, can also be used pigmented with dyes » A method according to claim 1, characterized in that the veneers pressed onto the carrier plate are removed from the press without recooling and are stacked for cooling and insulation » 3o) Method according to claim 1 and 2, characterized in that in the case of only one-sided veneering of the carrier board, the back of the board (moistened or not heated at the same time, or two at a time Carrier plates are placed with their backs against each other, pressed at the same time, with one to compensate for unevenness elastic cloth is placed between both panels » 4e) Method according to one of the claims mentioned, characterized in that that with single or double-sided veneering of the carrier plate, without simultaneous surface treatment, that Synthetic resin is applied to the carrier plate or to the veneer. 5 ·) Method according to claim 4, characterized in that instead of wood — veneer, decorative paper or thin G-weave mats and be used * 6) Method according to one of the claims mentioned, characterized in that that during the pressing process instead of the transportable pressing plates, a thermosetting plastic film, advantageously one Hostaphan film is used as a press and transport sheet » 7o) Method according to claim 6, characterized in that the peelable film was used as a protective film for storage and shipping 8.) Method according to one of the preceding claims, characterized in that that the compression of thermoplastic films (polyvinyl chloride (PVC), polyethylene Uodgl ») as surface material for Srager plates using a thermoset film as Press foil takes place during pressing » IAD 90 98 04/0551,