FI71263B - FOERFARANDE FOER FRAMSTAELLNING AV EN NAETFORMIG KRYMPFRI LIMNINGS- ELLER OEVERDRAGNINGSFILM - Google Patents

Description

71263 "I. Method for producing a reticulated non-shrinkable gluing or coating film For the production of a non-shrinkable adhesive or coating film in the form of a crimping film or adhesive film 5

The invention relates to a method for producing a reticulated non-shrinkable gluing or coating film from a hot melt, most preferably low melting wax mortar hot melt, which gluing or coating film is placed on or between a surface to be glued or coated and heat-sealed.

15 In many industrial areas, such as the textile, packaging and automotive industries, gluing or sealing films are used to bond surfaces together. Typically, such a "bonding film" is activated by heat, whereby the film melts between the surfaces to be joined or on the surface to be modified. Such sizing or coating films are typically thermoplastic plastics formed into a film by a blow molding process.

Due to the manufacturing method, it has been necessary to use plastics that melt at high temperatures. In addition, the problem has been film shrinkage in connection with the molten-25 support. Efforts have been made to overcome the latter difficulty by mechanically tearing such a film.

The object of the invention is to provide an improvement on the currently known methods. It is a more detailed object of the invention to provide a method which makes it possible to produce a non-shrinking adhesive film from hot-melt hot-melt hot-melt melts.

The object of the invention is achieved by a method which is mainly characterized in that the gluing or coating film is produced by applying 35 hot melt by means of a groove roll to a release paper web from which the perforated reticulated hot melt film can be removed as its own gluing or sealing film either immediately or only during gluing or coating.

2 71263

According to claim 2, the mesh structure of the gluing or coating film is adjusted by changing the groove pattern of the groove roll.

According to claim 3, the hot-sealing properties of the sizing or coating film are adjusted by changing the composition and physical properties of the hot melt.

The invention will be explained in detail with reference to a preferred embodiment of the invention shown in the figures of the accompanying drawing, to which, however, the invention is not intended to be exclusively limited.

Figure 1 shows a schematic side view of a preferred embodiment of the apparatus used in the method according to the invention.

Figure 2 shows the groove pattern of the groove roll.

The web-like release paper 2 to be coated comes from its own spool 1 or is a rotating, endless belt 2a. This release path 2,2a is preferably a silicone paper with good release properties, a polyester-20 film or the like. In the next step, a hot melt 3 is coated on the release track using known telecommunication technology, which is metered by means of a groove roll 4. The recesses in the groove roll 4 are filled with heat-melted hot melt in the basin 5. When the groove roll 4 passes through the scraper 6 before the coating is pressed, the melt 3 remains only in the groove cavities.

When the rubber roller 7 presses the track 2,2a and the groove roller 4 "empties" the grooves on the track 2.2a to be coated and due to the groove structure 8 of the groove roller 4, a web-like coating is formed on the track 2.2a. After cooling 9, the formed adhesive or coating film can be detached as its own track 10, or if the coating takes place using its own unwinding roll 1, the roll 11 is formed such as an adhesive sealing film that also includes a release pad which is only removed during sealing.

An example is the retina prepared on the Rastle Ky test line using 9224-2 3 35 Hot Melt Adhesive manufactured by UPACO ADHESIVE INC with a specific gravity of 0.992 g / cm and a melting point; start 95 ° C end 104 ° C (ASTME-28). The groove structure in the 8 rolls is a 4,011 oblique square, the lengths of the axes of which from the center to the center were 3,71263 4 mm x 2 mm, respectively. The depth and width of the grooves were such that the resulting retina 2 had a basis weight of 60 g / m 2. The track to be coated (release pad) was silicone paper. The resulting adhesive film was sealed together (laminated) without shrinkage e.g. paper / paper and 5 paper / aluminum combinations.

Of course, the invention is not limited to the above example, but the most versatile network structures as well as hot melt can be used. 10 suitable hot melts are selected for joining difficult-to-glue products.

Claims (2)

71263 A method for producing a reticulated non-shrinkable gluing or coating film from a hot melt (3), most preferably low temperature melting waxy hot melts, which gluing or coating film (10,11) is placed on a surface to be glued or coated or characterized in that the gluing or coating film (10,11) is produced by applying hot melt by means of a groove roll (4) to a release paper web (2,2a) from which the perforated reticulated hot melt film can be detached into its own gluing or coating film (10); 11) either immediately or only in connection with a gluing or coating operation. 15 20 25 30 35