TW201819150A - Manufacturing method of microstructure transfer film and product thereof for greatly reducing process and cost and saving space and capable of recycling substrate layer for reuse - Google Patents

Abstract

The present invention provides a manufacturing method of microstructure transfer film and product thereof, which includes the following major steps: a. extruding two types of incompatible thermoplastic polymer materials by double-layered coextrusion, wherein a double-layered extrusion object is formed by extrusion from a T-shaped mold head having one side formed as a substrate layer and the other side attached with a transfer layer; b. using a back pressing roller and a layout roller configured with a microstructure on the surface to press the double-layered extrusion into a film and forming a microstructure surface on the transfer layer; and, c. evaporating a metal reflective layer on the microstructure surface to fabricate the microstructure transfer film. Thus, the manufacturing of microstructure transfer film may become simpler and faster to greatly reduce the cost and process and save the space. During application, after peeling off, the substrate layer may be kept flat to be recycled for reuse.

Description

   Manufacturing method of microstructure transfer film and its product   

The invention relates to a method for manufacturing a microstructure transfer film and its products, especially its manufacturing method, which can greatly reduce the manufacturing process, reduce costs, and save space, and the product can be kept flat after being peeled off from the substrate for recycling.

Press, micro-structured film, that is, vapor-deposited film with laser holographic micro-structured lines on the surface, such as cat's eyes, lenses, holograms, floating shadows, etc., which can use the interference of light to produce colorful colors, and the pattern is obviously bright and colorful, with an iridescent effect Jia also has anti-counterfeiting effects, and is widely used in various high-quality boutique packaging.

Common micro-structured films can be laminated with paper and then applied to the packaging of high-end alcoholic beverages, but they cannot be used on cigarettes. Mainly because of relevant laws and regulations, the micro-structured film on cigarettes must be Use transfer paper, that is, make a transfer film before transferring to paper.

Please refer to FIG. 6, which is a production schematic diagram of a conventional microstructure transfer film 90. When manufacturing, first prepare a roll of base material layer 910, and the front end of the production layer passes the coating head R3 on the roller R1 and the storage tray R2, and applies a hardenable resin transfer layer 920 on one side of the base material layer 910, that is, ultraviolet rays. The hardenable glue (UV glue) passes through the support wheel R4 to the other roller group R5, and then the hardenable resin transfer layer 920 (UV glue) on the substrate layer 910 is rolled over a microstructure plate wheel R6. The ultraviolet irradiation unit R7 disposed at the opposite side is irradiated and cured to form a microstructure surface 930 on the hardenable resin transfer layer 920. As shown in FIG. 7, a metal reflective layer is evaporated on the microstructure surface 930 940, and a hot-melt adhesive layer 951 is provided on the metal reflective layer 940 to facilitate subsequent transfer to the paper box 4 or the surface of the paper for application.

However, the cost of the UV adhesive material of the hardenable resin transfer layer 920 is quite expensive, which is about RMB 60 to 100 per kilogram, which causes a significant increase in manufacturing costs. Moreover, when the conventional microstructure transfer film 90 is transferred to paper for application, once the base material layer 910 is torn off, it will instantly distort and wrinkle, which cannot be recycled in a roll, causing waste, which is its main disadvantage.

In order to solve the drawbacks of the above-mentioned conventional microstructure transfer film, such as high production material costs and product application disadvantages, the main object of the present invention is to provide a method for manufacturing a microstructure transfer film and its products, the steps include: a. Incompatible two thermoplastic polymer raw materials are extruded through a double-layer coextrusion, and extruded from a T-die to form a double-layer extrudate, forming a substrate layer on one side and a transfer layer on the other side; b. Via a back pressure wheel and a plate wheel with a microstructure on the surface, extruding the double-layer extrudate into a film, and forming a microstructure surface on the transfer layer; and c. Vapor deposition on the microstructure surface Forming a metal reflective layer to make a microstructure transfer film; a preferred implementation, wherein step a. Is to place two incompatible thermoplastic polymer materials into two extruders, melt the extruder and splitter After splitting, two layers are formed and extruded from a T-shaped die. After step b, a cooling wheel and a winding wheel are first used to cool and wind to form a multi-layered semi-finished product; then step c is performed by aluminum evaporation. A metal reflective layer is formed on the microstructure surface; and A microstructure transfer film of the product of the present invention mainly includes: a substrate layer, a transfer layer, a microstructure surface, and a metal reflective layer, wherein the substrate layer and the transfer layer are two incompatible thermoplastic polymers. The microstructure surface is formed on the transfer layer by pressing the back pressure wheel and a plate wheel provided with a microstructure on the surface, and the metal reflection layer is formed by evaporation. On the microstructure surface.

Thereby, the manufacturing of the microstructure transfer film is simpler and faster, the cost can be greatly reduced, the manufacturing process can be saved, and the substrate layer can be kept flat after being peeled off for recycling.

11‧‧‧Extruder

12‧‧‧Extruder

13‧‧‧T-shaped die

14‧‧‧Back pressure wheel

15‧‧‧version round

151‧‧‧microstructure

16‧‧‧ cooling wheel

17‧‧‧Rewinder

20‧‧‧ microstructure transfer film

21‧‧‧ substrate layer

210‧‧‧ thermoplastic polymer

22‧‧‧ transfer layer

220‧‧‧ thermoplastic polymer

23‧‧‧ microstructure surface

24‧‧‧ metal reflective layer

31‧‧‧Hot Melt Adhesive Layer

4‧‧‧ carton

90‧‧‧ microstructure transfer film

910‧‧‧ substrate layer

920‧‧‧Transfer layer

930‧‧‧microstructure surface

940‧‧‧metal reflective layer

951‧‧‧Hot Melt Adhesive Layer

R1‧‧‧Roller

R2‧‧‧Storage tray

R3‧‧‧coating head

R4‧‧‧ Support Wheel

R5‧‧‧roller set

R6‧‧‧Microstructure wheel

R7‧‧‧UV irradiation unit

S101, S102, S103‧‧‧ steps

FIG. 1 is a flowchart of a method for manufacturing a microstructure transfer film according to the present invention.

FIG. 2 is a production schematic diagram of a method for manufacturing a microstructure transfer film according to the present invention.

Fig. 3 is a sectional view of a microstructure transfer film product according to the present invention.

Figure 4 is a schematic diagram of the application of the microstructure transfer film product of the present invention.

Fig. 5 is a sectional view of the application of the microstructure transfer film product of the present invention.

FIG. 6 is a production schematic diagram of a conventional microstructure transfer film manufacturing method.

Figure 7 is a cross-sectional view of the application of a conventional microstructure transfer film product.

In order to enable your reviewers to further understand the composition, features, and effects of the method of the present invention, drawings and detailed descriptions of the preferred embodiments are attached below. Please refer to Figs. 1 to 3, the manufacturing method of the microstructure transfer film 20 of the present invention, the main steps include: Step S101 a. Extrusion of two incompatible thermoplastic polymers 210 and 220 raw materials through double-layer co-extrusion A T-die 13 is extruded to form a double-layered extrudate. One side forms a substrate layer 21 and the other side adheres to a transfer layer 22; Step S102 b. A microstructure is provided through a back pressure wheel 14 and a surface Plate wheel 15 of 151, extruding the double-layer extrudate into a film, and forming a microstructured surface 23 on the transfer layer 22; and step S103 c. Forming a metal reflective layer on the microstructured surface 23 by evaporation 24, to make a microstructure transfer film 20; more specifically, as shown in FIG. 2, in which step a. Can be performed, two kinds of incompatible thermoplastic polymers 210, 220 raw materials can be put into two extrusions respectively In the machines 11 and 12, two layers are formed after being extruded from the melter and diverted by the diverter, and are extruded from the T-shaped die head 13 to be cooled by the plate wheel 15. The film is formed by the pressing of the back pressure wheel 14 to form one side A substrate layer 21 and a transfer layer 22 attached to the other side; and a microstructured surface 23 is formed on the transfer layer 22, and after step b, a The cooling wheel 16 and a winding wheel 17 form a multi-layered semi-finished product by cooling and rolling, but the actual manufacturing is not limited to this. Of course, other cooling or rolling methods can also be used to achieve it. Step c is performed again; the metal reflective layer 24 is usually deposited on the microstructure surface 23 of the transfer layer 22 through an evaporation machine (not shown), which is usually an aluminum metal thin film, as shown in FIG. 3. A microstructure transfer mold 20.

As a result, the manufacturing of the microstructure transfer film 20 is simpler and faster, which can greatly reduce the cost, reduce the manufacturing process, and save space.

As shown in FIG. 3, the microstructure transfer film 20 produced according to the method of the present invention mainly includes: a substrate layer 21, a transfer layer 22, a microstructure surface 23, and a metal reflective layer 24, wherein the substrate layer 21 and the transfer layer 22 are two incompatible thermoplastic polymers 210 and 220, which are composed of two layers of co-extrusion extrusion. The microstructure surface 23 is a back pressure wheel 14 and a plate wheel with a microstructure 151 on the surface. 15 is formed on the transfer layer 22 by extrusion, and the metal reflective layer 24 is formed on the microstructure surface 23 by evaporation.

The microstructure transfer film 20 is composed of the transfer layer 22 on the base layer 21 and the microstructure surface 23 is formed on the transfer layer 22 by embossing. The metal reflective layer 24 is formed on the microstructure surface 23 by evaporation. The evaporation material of the metal reflective layer 24 is, for example, but not limited to, aluminum.

As shown in FIG. 2, the thermoplastic polymer 220 used in the transfer layer 22 is, for example, but not limited to, polyethylene, polypropylene, a copolymer of polyethylene, a copolymer of polypropylene, or a polymer containing polyethylene or polypropylene. The cost of the mixture is about RMB 10 ~ 20 per kg, compared with about RMB 60 ~ 100 per kg of the UV adhesive transfer layer of the conventional product, which can significantly reduce the manufacturing cost of the microstructure transfer film 20. .

Preferably, the content of the mixture containing polyethylene and polypropylene is, for example, but not limited to, more than 50%, and the mixture containing polyethylene and polypropylene further includes a trace amount of additives such as but not limited to Limited to slip agents or slip agents.

For example, if the transfer layer 22 is polypropylene (PP), the base material layer 21 may be a thermoplastic polymer 210 that is incompatible with polypropylene (PP). Therefore, after the film is formed, the transfer layer 22 and the base material layer 21 are formed. They do not stick to each other, and are only temporarily attached. They can be separated quickly by applying appropriate external force.

Preferably, when the transfer layer 22 is polypropylene (PP) or polyethylene (PE), the substrate layer 21 may be polybutylene terephthalate (PBT), polyacetal resin (POM), It is composed of one of hyper-crosslinked polymers (HCPs), polyethylene terephthalate (PET), polycarbonate (PC), and polyamide (PA, nylon).

Please refer to FIGS. 2 to 5. The microstructure transfer mold 20 of the product of the method of the present invention is made of two thermoplastic polymers 210 and 220 which are incompatible with each other in the transfer layer 22 and the substrate layer 21. It will not stick to each other, it is only temporarily attached, and it can be separated quickly by applying appropriate external force. In practice, a hot-melt adhesive layer 31 is provided on the metal reflective layer 24. When the substrate layer 21 is peeled off when transferred to the carton 4 surface, the entire substrate layer 21 can remain flat for recycling. Is the biggest feature of the present invention. The provided microstructure transfer mold 20 manufacturing method and its products are indeed progressive, and can successfully and effectively overcome the shortcomings of the conventional manufacturing method and the application of its finished products.

In summary, the novel and practical technology of the present invention has obvious progress compared with the conventional technology, and also has industrial applicability, which fully meets the patent requirements, and thus filed an application for an invention patent. However, the above are only the preferred embodiments of the present invention, and the scope of implementation of the present invention cannot be limited by this; therefore, any equivalent changes and modifications made in accordance with the scope of the patent application for this invention and the contents of the creative description are It should still fall within the scope of the invention patent.

Claims (9)

    A method for manufacturing a microstructure transfer film, the main steps include: a. Extruding two incompatible thermoplastic polymer raw materials through a double-layer coextrusion, and extruding from a T-die to form a double-layer extrudate, one side Forming a substrate layer and attaching a transfer layer on the other side; b. Extruding a double-layer extruded film into a film through a back pressure wheel and a plate wheel provided with a microstructure on the surface, and forming a layer on the transfer layer A microstructure surface, and c. Forming a metal reflective layer on the microstructure surface by evaporation to form a microstructure transfer film.         For example, the method for manufacturing a microstructure transfer film as described in the first item of the scope of the patent application, wherein the step a is to put two incompatible thermoplastic polymer raw materials into two extruders respectively, and after the melt extruder and the diverter split Two layers are formed to be extruded from a T-die; after step b, a cooling wheel and a winding wheel are firstly used to cool and wind to form a multi-layered semi-finished product; then step c is performed by aluminum evaporation A metal reflective layer is formed on the microstructure surface.         The method for manufacturing a microstructure transfer film according to item 1 of the scope of the patent application, wherein the transfer layer is composed of one of polypropylene (PP) and polyethylene (PE); and the substrate layer is polybutene-p-benzene Diformate (PBT), polyacetal resin (POM), hypercrosslinked polymers (HCPs), polyethylene terephthalate (PET), polycarbonate (PC), and polyamide ( PA).         The method for manufacturing a microstructured transfer film according to item 1 of the scope of patent application, wherein the transfer layer is one of polyethylene, polypropylene, a copolymer of polyethylene, a copolymer of polypropylene, or a mixture containing polyethylene and polypropylene Made up.         The method for manufacturing a microstructure transfer film according to item 4 of the scope of the patent application, wherein the substrate layer is polyethylene terephthalate.         The method for manufacturing a microstructure transfer film according to item 4 of the scope of the patent application, wherein the content of polyethylene and polypropylene in the mixture containing polyethylene and polypropylene is higher than 50%.         The method for manufacturing a microstructure transfer film according to item 4 of the scope of the patent application, wherein the mixture containing polyethylene and polypropylene further comprises a trace amount of additives, and the trace amounts of additives are slip agents or slip agents.         A microstructure transfer film mainly includes a substrate layer, a transfer layer, a microstructure surface, and a metal reflective layer. The substrate layer and the transfer layer are two incompatible thermoplastic polymers. The microstructure surface is formed by extruding a back pressure wheel and a plate wheel provided with a microstructure on the surface to form a transfer layer, and the metal reflection layer is formed on the microlayer by evaporation. Structural surface.         The microstructure transfer film according to item 8 of the scope of the patent application, wherein the metal reflective layer is further provided with a hot-melt adhesive layer.