WO2018103012A1 - Microstructure transfer film manufacturing method and microstructure transfer film - Google Patents

Abstract

A microstructure transfer film manufacturing film and a microstructure transfer film, the main steps comprising: Step a. - co-extruding two non-compatible types of thermoplastic polymer raw material, extruded and formed into a two-layer extrudate by a T-geometry die, one side forming a base material layer and the other side having attached a transfer layer; Step b. - by means of a back pressure wheel and a plate wheel having a surface provided with a microstructure, pressing the two-layer extrudate into a film, and forming a microstructure surface on the transfer layer, and; Step c. - forming by evaporation a metal reflecting layer on the microstructure surface, so as to create a microstructure transfer film. In this manner, forming a microstructure transfer film is simpler and faster, can greatly lower costs and reduce and save space, and a base material layer remains flat after removal, permitting recycling and reuse.

Description

 Method for manufacturing microstructure transfer film and microstructure transfer film

 [0001] The present invention relates to a method for manufacturing a microstructure transfer film and a microstructure transfer film, in particular, the method for manufacturing the method can greatly reduce the process, reduce the cost, and save space, and the substrate layer can be kept flat after the substrate is peeled off. For recycling and reuse.

 Background technique

 [0002] A microstructured film, that is, an evaporation film having a laser holographic structure on the surface, such as a cat's eye, a lens, a hologram, a floating image, etc., which can utilize light interference to produce a colorful color, and the pattern is obviously colorful and bright, It has excellent effects and anti-counterfeiting effect, and is widely used in various high-quality boutique packaging.

 [0003] A common microstructure film can be applied to a high-grade wine packaging box after being covered with paper, but it cannot be used on a cigarette packaging box, mainly because of the relevant laws and regulations, and the micro-package box. The structural film must use transfer paper, that is, the transfer film should be first transferred to the paper.

 [0004] Please refer to FIG. 6, which is a schematic diagram of the production of the conventional microstructure transfer film 90. After manufacturing, a roll of substrate layer 910 is prepared, and a front end of the substrate layer 910 is coated with a hardened resin transfer layer 920, that is, ultraviolet rays, through a coating head R3 on the roll R1 and the stocker R2. The hardenable glue (UV glue) passes through the support wheel R4 to the roller group R5 on the other side, and then the hardenable resin transfer layer (UV glue) 920 on the substrate layer 910 is rolled over a microstructured wheel R6, The ultraviolet irradiation unit R7 disposed on the opposite side is irradiated and shaped to form a microstructured surface 930 on the hardenable resin transfer layer 920. As shown in FIG. 7, a metal reflective layer is deposited on the microstructured surface 930. 940, and a hot melt adhesive layer 951 is further disposed on the metal reflective layer 940 to facilitate subsequent transfer to the tray 4 or the surface of the paper.

 technical problem

 [0005] However, the cost of the UV adhesive material of the hardenable resin transfer layer 920 is quite expensive, and is now about RMB 60 per kg.

00 yuan, resulting in a substantial increase in manufacturing costs. Moreover, when the conventional microstructure transfer film 90 is transferred to the paper for application, the substrate layer 910 will be twisted and wrinkled instantaneously after being torn off, and it is impossible to roll and recycle and waste, which is a major defect.

Problem solution Technical solution

 [0006] In order to solve the defects in the production cost of the prior art microstructure transfer film and the defects in the application thereof, the main object of the present invention is to provide a method for manufacturing a microstructure transfer film and a microstructure transfer film. , its steps include:

 [0007] Step a. Incompatible two thermoplastic polymer materials are coextruded by two layers, extruded from a T-die to form a two-layer extrudate, one side of which forms a substrate layer, and the other side is attached a transfer layer

[0008] Step b. through a back pressure wheel and a surface of the micro-structured wheel, the two-layer extrudate is extruded into a film, and a microstructured surface is formed on the transfer layer, and;

[0009] Step c. Forming a metal reflective layer on the microstructured surface to form a microstructure transfer film.

[0010] In a preferred embodiment, the step a is to put two incompatible thermoplastic polymer raw materials into two extruders, and after splitting by melt extruding and splitting, form two layers from a T-die. After extruding, after step b, a cooling layer and a winding wheel are firstly cooled to form a composite layer semi-finished product; and then step c is performed to form a metal reflective layer on the surface of the microstructure surface by aluminum evaporation. .

[0011] wherein, the transfer layer is one of polypropylene (PP) and polyethylene (PE); and the substrate layer is polybutylene terephthalate (PBT), polyacetal resin ( POM), super crosslinked polymers (HCPs), polyethylene terephthalate (PET), polycarbonate (PC) and polyamide (PA).

[0012] wherein the transfer layer is a copolymer of polyethylene, polypropylene, polyethylene, a copolymer of polypropylene or a mixture containing polyethylene or polypropylene.

[0013] wherein the substrate layer is polyethylene terephthalate. Among them, the content of polyethylene and polypropylene in the mixture containing polyethylene and polypropylene is higher than 50%. Wherein the mixture containing polyethylene and polypropylene further comprises a trace additive, which is a slip agent or a slip agent.

[0014] The article of the present invention is a microstructure transfer film, which 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 An incompatible thermoplastic polymer consisting of two-layer co-extrusion extrusion, the microstructured surface being formed on the transfer layer by pressing a back pressure wheel and a plate wheel having a microstructure on the surface, and; the metal reflective layer It is formed on the microstructured surface by evaporation. And wherein the metal reflective layer is further provided with a hot melt adhesive layer.

 Advantageous effects of the invention

Beneficial effect [0015] Thereby, the microstructure transfer film is simpler and faster to manufacture, and the cost reduction process can be greatly reduced to save space, and the substrate layer can be kept flat for recycling after application.

 Brief description of the drawing

 DRAWINGS

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

 2 is a schematic view showing the production of a method for manufacturing a microstructure transfer film of the present invention.

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

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

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

 [0021] FIG. 6 is a schematic view showing the production of a conventional method for manufacturing a microstructure transfer film.

 [0022] FIG. 7 is a cross-sectional view showing the application of a conventional microstructure transfer film product.

 DESCRIPTION OF REFERENCE NUMERALS

 [0024] 11...Extruder

 [0025] 12...Extrusion machine

 13...T-shaped die

 [0027] 14...back pressure wheel

 [0028] 15... Edition wheel

 [0029] 151...microstructure

 [0030] 16...cooling wheel

 [0031] 17...rolling round

 20...microstructure transfer film

 [0033] 21...substrate layer

 210...thermoplastic polymer

 [0035] 22...transfer layer

 220...thermoplastic polymer

 [0037] 23... microstructured surface

 [0038] 24... metal reflective layer

[0039] 31... hot melt adhesive layer [0040] 4...carton

 [0041] 90..., microstructure transfer film

 [0042] 910. .. substrate layer

 [0043] 920. .. transfer layer

 [0044] 930. .. microstructure surface

 [0045] 940. .. metal reflective layer

 [0046] 951. .. hot melt adhesive layer

 [0047] Rl .. . roller

 [0048] R2.. . storage tray

 [0049] R3.. . coating head

 [0050] R4.. support wheel

 [0051] R5.. . Roller set

 [0052] R6.. . Microstructure wheel

 [0053] R7.. UV irradiation unit

 [0054] Steps S101, S102, S103.

 BEST MODE FOR CARRYING OUT THE INVENTION

 BEST MODE FOR CARRYING OUT THE INVENTION

 [0055] In order for the examiner to further understand the composition, characteristics, and efficacy of the method of the present invention, the following detailed description will be given in conjunction with the preferred embodiments. Referring to Figures 1-3, the manufacturing method of the microstructure transfer film 20 of the present invention, the main steps include:

 [0056] Step a. Incompatible two thermoplastic polymers 210, 220 raw materials are coextruded by two layers, extruded by a T-die 13 to form a two-layer extrudate, and a substrate layer is formed. 21, the other side attached to a transfer layer 22

[0057] Step b. The bilayer extrudate is extruded into a film by a back pressure wheel 14 and a plate wheel 15 having a microstructure 151 on the surface, and a microstructured surface 23 is formed on the transfer layer 22. as well as;

[0058] Step c. vapor deposition on the microstructured surface 23 to form a metal reflective layer 24 to form a microstructure transfer film 20;

More specifically, as shown in FIG. 2, wherein the step of performing the step a. two incompatible thermoplastic polymers can be used.

210, 220 raw materials are placed in two extruders 11, 12, formed by melt extrusion and shunt splitting The two layers are extruded from the T-die 13 to be cooled by the plate wheel 15, and the film is formed by extrusion of the back pressure wheel 14, so that one substrate layer 21 is formed on one side and a transfer layer 22 is attached to the other side; A microstructure surface 23 is formed on the transfer layer 22. After the step b, a cooling layer 16 and a winding wheel 17 are first passed to form a composite layer semi-finished product by cooling, but the actual manufacturing is not Limits, of course, can be achieved by other cooling or retracting methods. Step c is further performed; and the metal reflective layer 24 is deposited on the microstructured surface 23 of the transfer layer 22 by an evaporation machine (not shown), usually an aluminum metal film, as shown in FIG. Microstructure transfer mold 20.

 [0060] Thereby, the microstructure transfer film 20 is made simpler and faster to manufacture, and the cost reduction process can be greatly reduced.

 [0061] 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 base The material layer 21 and the transfer layer 22 are two incompatible thermoplastic polymers 210, 220, which are formed by two-layer co-extrusion extrusion, and the microstructured surface 23 is provided with a microstructure 151 on the back pressure wheel 14 and the surface. The plate wheel 15 is extruded to be formed on the transfer layer 22, and the metal reflective layer 24 is formed on the microstructured surface 23 by evaporation.

 [0062] 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.

 [0063] 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 contains polyethylene, poly The cost of a mixture of propylene is about 10 yuan to 20 yuan per kilogram. Compared with the above-mentioned existing products, the UV adhesive transfer layer is about 60 yuan to 100 yuan per kilogram, which can achieve a substantial reduction in the microstructure transfer film 20 Manufacturing cost

[0064] 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, the trace addition For example, but not limited to, a slip or slip agent.

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), so that the transfer layer 22 and the substrate are formed after film formation. The layers 21 are not sticky to each other, and are only in a temporary fit state, and can be quickly branched by applying an appropriate external force. [0066] Preferably, when the transfer layer 22 is polypropylene (PP) or polyethylene (PE), the substrate layer 21 may be polybutylene terephthalate (PBT) or polyacetal resin ( POM), super crosslinked polymers (HCPs), polyethylene terephthalate (PET), polycarbonate (PC), and polyamide (PA, nylon).

 Referring to FIGS. 2-5, 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. They are not sticky to each other, only in a temporary fit state, and they can be quickly separated by applying appropriate external force. A hot melt adhesive layer 31 is disposed on the metal reflective layer 24 of the actual application. After the transfer is applied to the surface of the paper box 4, after the base material layer 21 is peeled off, the entire substrate layer 21 can be kept flat for recycling. , is the biggest feature of the invention. The provided microstructure transfer mold 20 manufacturing method and microstructure transfer mold 20 are indeed progressive and can successfully overcome the defects of the existing manufacturing method and its finished product application.

 Industrial applicability

 In summary, the novel utility of the present invention has significant progress compared with the prior art, and the same is also available for industrial use, fully conforms to the conditions for applying for an invention patent, and proposes an invention patent application. However, the above description is only for the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto; therefore, equivalent changes and modifications made in accordance with the claims and the contents of the specification of the present invention should still belong to Within the scope of protection of the present invention.

Claims

Claim  [Claim 1] A method of manufacturing a microstructure transfer film, comprising the steps of:  Step a. Incompatible two thermoplastic polymer raw materials are coextruded by two layers, extruded from a T-die to form a two-layer extrudate, one side of which forms a substrate layer, and the other side is attached with a transfer layer ;  Step b. extruding the two-layer extrudate into a film by a back pressure roller and a plate wheel having a microstructure on the surface, and forming a microstructured surface on the transfer layer, and;  Step c. Forming a metal reflective layer on the microstructured surface to form a microstructure transfer film.  [Claim 2] 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, and melt and extrude them. After the splitter is split, two layers are formed, which are extruded from a T-die; after the step b, a cooling layer and a winding wheel are firstly cooled to form a composite layer semi-finished product; and then the step c is performed with aluminum. The metal reflective layer is formed on the surface side of the microstructure by a vapor deposition method.  [Claim 3] The method for producing a microstructure transfer film according to claim 1, wherein the transfer layer is one of polypropylene and polyethylene; and the base material layer is polybutene terephthalate One of a formate, a polyacetal resin, a super crosslinked polymer, a polyethylene terephthalate, a polycarbonate, and a polyamide.  [Claim 4] The method for producing a microstructure transfer film according to claim 1, wherein the transfer layer is a copolymer of polyethylene, polypropylene, polyethylene, a copolymer of polypropylene, or contains polyethylene. a mixture of polypropylene.  The method of producing a microstructure transfer film according to claim 4, wherein the substrate layer is polyethylene terephthalate. [Claim 6] The method for producing a microstructure transfer film according to claim 4, wherein the polyethylene-containing polypropylene-containing mixture has a content of polyethylene or polypropylene of more than 50 < 3⁄4. [Claim 7] 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 slippery Agent. [Claim 8] A microstructure transfer film, comprising: a substrate layer, a transfer layer, and a micro a structural surface and a metal reflective layer, wherein the substrate layer and the transfer layer are two incompatible thermoplastic polymers, which are composed of a double layer co-extrusion extrusion, the microstructure surface being a back pressure roller and a surface A plate wheel having a microstructure is formed by extrusion on the transfer layer, and the metal reflective layer is formed on the microstructured surface by evaporation.  [Claim 9] The microstructure transfer film according to claim 8, wherein the metal reflective layer is advanced  A hot melt adhesive layer is provided in one step.