TWI610790B - Method for manufacturing microstructure transfer film and product thereof - Google Patents

Description

Method for manufacturing microstructure transfer film and product thereof

The invention relates to a method for manufacturing a microstructure transfer film and a product thereof, in particular to a method for greatly reducing the process, reducing the cost and saving space, and the substrate layer can be kept flat for recycling after the product is applied.

According to the micro-structured film, that is, the vapor-deposited film with the laser-like holographic pattern on the surface, such as cat's eye, lens, hologram, floating shadow, etc., it can use the light interference to produce colorful colors, the pattern is obviously colorful and the rainbow effect It has anti-counterfeiting effect and is widely used in various high-quality boutique packaging.

The common microstructure film can be applied to the packaging of high-grade wine after it is covered with paper, but it cannot be used on the cigarette packaging box. The main reason is that the microstructure film on the cigarette packaging box must be Use transfer paper, that is, first transfer film and transfer to paper.

Please refer to FIG. 6 for a schematic diagram of the production of the conventional microstructure transfer film 90. At the time of manufacture, a roll of the substrate layer 910 is prepared, and the front end of the substrate layer 910 is coated with a hardenable resin transfer layer 920, that is, ultraviolet rays, through the coating head R3 on the roll R1 and the stocker R2. The hardenable glue (UV glue) passes through the support wheel R4 to the other roller group R5, and then the hardenable resin on the substrate layer 910 is transferred. The layer 920 (UV glue) is rolled over a microstructured plate wheel R6, and is irradiated and shaped by the ultraviolet irradiation unit R7 disposed on the opposite side to form a microstructured surface 930 on the hardenable resin transfer layer 920, such as the seventh layer. As shown, a metal reflective layer 940 is deposited on the microstructured surface 930, and a hot melt adhesive layer 951 is placed over the metal reflective layer 940 to facilitate subsequent transfer to the carton 4 or paper surface.

However, the cost of the UV adhesive material of the hardened resin transfer layer 920 is quite expensive, and is now about RMB 60 to 100 per kilogram, resulting in a substantial increase in manufacturing costs. Moreover, when the conventional microstructure transfer film 90 is transferred to a paper application, once the base material layer 910 is torn off, the wrinkles and wrinkles are instantaneously generated, and the waste cannot be recovered by recycling and recycling, which is a major disadvantage.

In order to solve the disadvantages of the above-mentioned conventional microstructure transfer film production material cost and its application, the main object of the present invention is to provide a method for manufacturing a microstructure transfer film and a product thereof, the steps of which include: a. The incompatible two kinds of thermoplastic polymer raw materials are co-extruded by two layers, and are extruded from a T-die to form a double-layered extrudate, forming a substrate layer on one side and a transfer layer on the other side; b. Passing a back pressure roller and a plate with a microstructure on the surface to extrude the two-layer extrudate into a film, and forming a microstructured surface on the transfer layer; and c. evaporating on the microstructured surface Forming a metal reflective layer to form a microstructure transfer film; Preferably, in the step a. two incompatible thermoplastic polymer raw materials are placed in two extruders, and the two layers are formed by a melt extrusion and a splitter to be extruded from a T-die. After the step b, a multi-layer semi-finished product is formed by cooling and winding through a cooling wheel and a reeling wheel; and a metal reflective layer is formed on the surface of the microstructured surface by aluminum vapor deposition in a step c; A microstructure transfer film comprising: a substrate layer, a transfer layer, a microstructured surface, and a metal reflective layer, wherein the substrate layer and the transfer layer are two incompatible thermoplastic polymers, The double-layer co-extrusion extrusion is formed on the transfer layer by pressing the back pressure roller and the plate wheel having the microstructure on the surface, and the metal reflective layer is formed by evaporation. Structural surface.

Thereby, the microstructure transfer film is made simpler and faster, and the cost reduction process can be greatly reduced, and the space can be kept flat for the recycling and reuse after the substrate layer is peeled off.

11‧‧‧Exporting machine

12‧‧‧Exporting machine

13‧‧‧T-die

14‧‧‧Back pressure wheel

15‧‧‧ edition round

151‧‧‧Microstructure

16‧‧‧Cooling wheel

17‧‧‧Retraction round

20‧‧‧Microstructure Transfer Film

21‧‧‧Substrate layer

210‧‧‧ thermoplastic polymer

22‧‧‧Transfer layer

220‧‧‧ thermoplastic polymer

23‧‧‧Microstructured surface

24‧‧‧Metal reflector

31‧‧‧ hot melt adhesive layer

4‧‧‧carton

90‧‧‧Microstructure transfer film

910‧‧‧Substrate layer

920‧‧‧Transfer layer

930‧‧‧Microstructured surface

940‧‧‧Metal reflector

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

1 is a flow chart of a method for manufacturing a microstructure transfer film of the present invention.

Fig. 2 is a schematic view showing the production of the microstructure transfer film of the present invention.

Figure 3 is a cross-sectional view of a microstructure transfer film article of the present invention.

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

Figure 5 is a cross-sectional view showing the application of the microstructure transfer film article of the present invention.

Figure 6 is a schematic view showing the production of a conventional microstructure transfer film manufacturing method.

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

In order to provide a further understanding of the composition, features, and effects of the methods of the present invention, the detailed description of the drawings and the preferred embodiments are set forth below. Referring to Figures 1-3, the method for manufacturing the microstructure transfer film 20 of the present invention comprises the following steps: Step S101 a. Extrusion of two incompatible thermoplastic polymers 210 and 220 by double-layer coextrusion Extrusion from the T-die 13 to form a two-layer extrudate, forming a substrate layer 21 while the other side is attached to a transfer layer 22; Step S102 b. Providing a microstructure through a back pressure wheel 14 and a surface a plate wheel 15 of 151, extruding the two-layer extrudate into a film, and forming a microstructured surface 23 on the transfer layer 22; and step S103 c. depositing a metal reflective layer on the microstructured surface 23 24, to make the microstructure transfer film 20; more specifically, as shown in Figure 2, wherein the steps a. can be carried out two kinds of incompatible thermoplastic polymer 210, 220 raw materials into two In the machines 11, 12, two layers are formed by the melt extrusion and the splitter are extruded from the T-die 13 to be cooled by the plate wheel 15, and the film is formed by the extrusion of the back pressure wheel 14, so that one side is formed. a substrate layer 21, the other side is attached to a transfer layer 22; and a microstructured surface 23 is formed on the transfer layer 22, and the b step may be followed by Cooling wheel 16 and a roll The wheel 17 is formed by cooling and winding to form a multi-layer semi-finished product, but the actual manufacturing is not limited thereto, and of course, other cooling or winding methods can be used. Step c is further performed; and the metal reflective layer 24 is deposited on the microstructured surface 23 of the transfer layer 22 through an evaporation machine (not shown), usually an aluminum metal film, as shown in FIG. A microstructure transfer mold 20.

Thereby, the microstructure transfer film 20 is made simpler and faster to manufacture, and the cost reduction process can be greatly reduced to save space.

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

The microstructure transfer film 20 is composed of the transfer layer 22 on the upper side of the substrate 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 microstructured surface 23 by vapor deposition. The vapor deposition 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, a copolymer of polyethylene, polypropylene, polyethylene, a copolymer of polypropylene, or a polyethylene or polypropylene. The cost of the mixture is about RMB 10 to RMB 20 per kg, compared to the UV adhesive transfer layer of the above-mentioned conventional products. Approximately RMB 60 to 100 yuan, it is indeed possible to achieve a significant reduction in 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 additive, such as but not Limited to slip or slip agent.

For example, if the transfer layer 22 is polypropylene (PP), the base material layer 21 may be selected from a thermoplastic polymer 210 which is incompatible with polypropylene (PP), and thus between the transfer layer 22 and the substrate layer 21 after film formation. They are not sticky to each other, only in a temporary fit state, and they can be quickly separated by applying an appropriate external force.

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

Referring to Figures 2 to 5, the article microstructure transfer mold 20 of the method of the present invention is made of two thermoplastic polymers 210, 220 whose transfer layer 22 is incompatible with the substrate layer 21, and which are mutually It will not be sticky, only in a temporary fit, and it can be quickly separated by applying an appropriate external force. A hot melt adhesive layer 31 is disposed on the metal reflective layer 24 of the actual application. When the substrate layer 21 is peeled off, the entire substrate layer 21 can be kept flat for recycling and reuse. Is the biggest feature of the invention. The manufacturing method and the article for manufacturing the microstructure transfer die 20 are indeed advanced, and can successfully overcome the shortcomings of the conventional manufacturing method and its finished product application.

In summary, the novel utility of the present invention has significant progress compared with the prior art, and at the same time, it has industrial availability, fully conforms to the patent requirements, and proposes an invention patent application. The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto; therefore, the equivalent changes and modifications made by the scope of the patent application and the content of the present invention are all It should remain within the scope of this invention.

11‧‧‧Exporting machine

12‧‧‧Exporting machine

13‧‧‧T-die

14‧‧‧Back pressure wheel

15‧‧‧ edition round

151‧‧‧Microstructure

16‧‧‧Cooling wheel

17‧‧‧Retraction round

20‧‧‧Microstructure Transfer Film

21‧‧‧Substrate layer

210‧‧‧ thermoplastic polymer

22‧‧‧Transfer layer

220‧‧‧ thermoplastic polymer

23‧‧‧Microstructured surface

Claims (9)

A method for manufacturing a microstructure transfer film, the main steps comprising: a. injecting two incompatible thermoplastic polymer raw materials through a double layer coextrusion, extruding from a T-die to form a two-layer extrudate, one side Forming a substrate layer and attaching a transfer layer on the other side; b. extruding the two-layer extrudate into a film via a back pressure roller and a plate wheel having a microstructure on the surface, and forming a film on the transfer layer a microstructured surface, and; c. vapor deposition on the microstructured surface to form a metallic reflective layer to form a microstructured transfer film. The method for manufacturing a microstructure transfer film according to claim 1, wherein the step a is to put two incompatible thermoplastic polymer raw materials into two extruders, after being melted and split by a splitter. Forming two layers from a T-die; after the step b, first forming a multi-layer semi-finished product through a cooling wheel and a reeling wheel, and then performing the c-step process by aluminum evaporation A metal reflective layer is formed on the surface side of the microstructure. The method for producing a microstructure transfer film according to claim 1, wherein the transfer layer is composed of one of polypropylene (PP) and polyethylene (PE); and the substrate layer is polybutene to benzene. Dicarboxylate (PBT), polyoxymethylene resin (POM), super crosslinked polymer (HCPs), polyethylene terephthalate (PET), polycarbonate (PC), and polyamine (PA) ) one of them. The method for producing a microstructure transfer film according to claim 1, wherein the transfer layer is a copolymer of polyethylene, polypropylene, polyethylene, and a copolymer of polypropylene. Or it consists of one of a mixture of polyethylene and polypropylene. The method for producing a microstructure transfer film according to claim 4, wherein the substrate layer is polyethylene terephthalate. The method for producing a microstructure transfer film according to claim 4, wherein the content of polyethylene and polypropylene in the mixture containing polyethylene and polypropylene is higher than 50%. The method for producing a microstructure transfer film according to claim 4, wherein the mixture containing polyethylene and polypropylene further comprises a trace additive, which is a slip agent or a slip agent. A microstructure transfer film mainly comprises: a substrate layer, a transfer layer, a microstructured surface, and a metal reflective layer, wherein the substrate layer and the transfer layer are two incompatible thermoplastic polymers, The layer is formed by co-extrusion extrusion, and the microstructured surface is formed on the transfer layer by pressing a back pressure roller and a plate with a microstructure on the surface, and the metal reflective layer is formed by evaporation. Structural surface. The microstructure transfer film of claim 8, wherein the metal reflective layer is further provided with a hot melt adhesive layer.