TH55A - A process for manufacturing thin sheets of material by bonding them together. - Google Patents

Abstract

This requested invention involves a thin sheet material and a manufacturing process. It consists of a paper-like material bonded to a composite layer, which must include at least one layer of varnish and one layer of metal. The bonding is initially done on a carrier foil sheet and then transferred to the paper-like material using a liquid adhesive. To prevent gas permeation, an additional layer of varnish may be applied to the metal and varnish layers. This also provides tear resistance to the thin sheet. The carrier foil portion, once separated, can be reused. This invention is quick and energy-efficient to produce.

Claims (5)

1. A thin sheet material consisting of a paper-like material on which at least a layer of varnish and a layer of metal are bonded together, with the following properties: 1.1 The paper-like material used is a sheet of paper (6) with a minimum weight of 30 g/m². 1.2 On this sheet of paper (6) is a layer of binder (5) of approximately 5 to 8 g/m², applied in liquid form with a solid content of 40% to 50%. 1.3 On this binder layer (5), the bonding of the metal layer and the varnish layer (4,3) adheres to the metal side. The bonding of the metal/varnish layer (4,3) does not exceed a total thickness of approximately 20 microns. 1.4 The varnish layer (3) of the bonding of the metal/varnish layer (4,3) consists of a varnish of a viscous consistency which is easily formed into a thin sheet and can still be applied to the metal withstand temperatures of at least 90°C and provide a high metallic gloss from the metal coating. 2. The thin sheet material according to claim 1 in the protective varnish layer (64) has the properties of being tough, gas-impermeable, and the varnish is coated on the metal side of the metal/varnish layer bonding (4,3). It can be said that the protective varnish layer is coated on the adhesive layer (5). 3. The process for the production of a thin sheet material consisting of a paper-like material on which it is bonded together, with at least one layer of varnish and a layer of metal which is initially made on a carrier foil and transferred to a paper-like material with the following properties: 3.1 A detachable layer of varnish (3) is coated on the carrier foil (1) with a thickness of approximately 19 to 30 microns. After drying, this varnish layer is viscous and forms a thin, impermeable sheet which can still coat the metal and withstand high temperatures of at least 90°C. 3.2 A layer of metal (4) no thicker than 5/10 microns is vaporized and coated on the varnish layer (3) as described above, thus forming a bonded layer with the varnish layer with a thickness of no more than 20 microns. 3.3 The amount of liquid binder (5) is approximately 5 to 8 g/m². 3.4 A paper-like material (6) is pressed onto the liquid binder layer (5) in a flattening machine (11). 3.5 The carrier foil (1), which contains a thin sheet of material consisting of the varnish/metal layer (3,4), the binder layer (5), and the paper-like material (6), is passed through a drying duct (10) where moisture evaporates until the moisture content is 7%. 3.6 Immediately after passing through the drying duct (10), the carrier foil is separated from the entire surface of the varnish layer (3), and the paper-like material (6) remains attached to the varnish and metal layers (3,4), and the binder layer (5) and carrier foil (1) are rolled off. 4. The procedure under claim 3 before the coating of the adhesive layer (5) by a layer of varnish to prevent (64) which prevents gas permeation is coated into the varnish layer and the metal layer (3,4) is formed on the carrier foil (1). 5. In accordance with claim 3 or 4, prior to the coating of the detachable varnish layer (3), a prepared separation layer (2) is applied, which improves the separation of the varnish layer (3) from the foil carrier (1). (Clause 5, 2 pages, 6 figures)