KR20200105612A - 3 Layer reflecting back cover and manufacturing method for LED ligntings - Google Patents

Abstract

The present invention relates to a back cover for triple structure LED lighting having a reflective function and a manufacturing method thereof and, more specifically, to a manufacturing method of a back cover for triple structure LED lighting, comprising: a coating polymer bead composition process; a polymer bead coating process; an adhesive composition process; a polyethylene film adhesive application process; a polyethylene film laminating process; a first aging process; an aluminum sheet adhesive application process; an aluminum sheet laminating process; a secondary aging process; and a completion process for a back cover for lighting.

Description

3-layer reflecting back cover and manufacturing method for LED ligntings}

The present invention relates to a three-layered LED lighting back cover including a reflective function and a manufacturing method thereof, and more particularly, to polypropylene or polyethylene terephthalate or polycarbonate It has been recently developed by attaching an adhesive made of an alloy or metal to a reflective film containing (polycarbonate) as the main material and forming the shape of the reflective film according to the shape of the desired shape of the adhesive made of an alloy or metal. It includes a reflective function that improves the reflective effect of the reflective film used in the lighting field used, and at the same time makes it lighter and improves shape retention, making it convenient to apply to the back cover for lighting with various uses. It relates to a three-layered LED lighting back cover and a manufacturing method thereof.

With the development of the industry, electric and electronic products such as TVs, computers, and lighting have been invented and distributed, and technologies that use light have been developed for such electric and electronic products, and the scope of use of reflective films among the technologies that use light Also, the research is being conducted to develop a more lightweight and highly efficient reflective film, and the patent documents of the prior art developed so far are as follows.

Patent Application No. 10-2006-009464 (2006.02.01) is an improved invention of a domestic registered patent (Registration No. 10-0318244). A film layer is formed with a thermoplastic resin (primer) solution on the back of a polyester film and vacuum deposited thereon. Urethane acrylic monomer on the surface of the polyester film in a conventional reflective film for a fluorescent lamp reflector formed by adhesively coating the above-described thermoplastic resin (primer) on the metal mirror surface formed by the method to form a film layer and forming an acrylic adhesive layer thereon. Or, it relates to a method for producing a reflective film for a fluorescent lamp reflector in which a coating layer having a pencil hardness of 2 or more is formed by forming a smooth surface with a solution in which an oligomer is dissolved in a solvent, and curing by irradiation with UV rays. Patent Application No. 10-2010-0039645 (2010.04.28) relates to a retroreflective sheet, comprising: a carrier sheet; a cover film disposed on the surface side of the carrier sheet and pressed; An adhesive layer formed between the carrier sheet and the cover film; A reflective layer interposed between the pressure-sensitive adhesive layer and a plurality of glass bead layers interposed between the carrier sheet and the reflective layer to refract light; A mesh fabric monolayer impregnated with the reflective layer and the glass bead layer is further interposed between the cover film and the pressure-sensitive adhesive layer; Convenience in the peeling process of the reflective sheet is improved, as well as ventilation properties are improved, and the utilization of the reflective sheet is expanded to enable diversification and high-quality products. Utility model registration application No. 1990-0017500 (November 15, 1990) is a transparent wrap on the reflective layer, unlike the method of attaching the PET resin film after applying an aluminum-deposited reflective layer by using a PET resin film with high hardness even in synthetic resin. (Connecting synthetic resin) The film is adhered in a post-treatment process to protect the aluminum-deposited reflective layer, and the manufacturing process is simple and the manufacturing cost is lowered to increase productivity. It was made to be supplemented. Patent Application No. 10-2015-0053499 (2015.05.18) is an alloy or metal made of an alloy with excellent shape retention in a flat reflective film formed with polypropylene or polyethylene terephtalate with excellent shape resilience as the main material. By maintaining the shape of the reflective film according to the shape of the water-based adhesive transformed into a desired shape, the reflective effect of the reflective film used in the display field such as LCD TV and computer monitor that has been recently developed and used is improved. At the same time, the present invention relates to a shape-retaining reflective film, a method of manufacturing the same, and an adhesive and a shape-retaining method used therein, so as to be conveniently applied to a reflective plate for lighting with infinite use.

However, as the reflective film or back cover used in the field of lighting and display so far has become lighter and slimmer, problems such as shape retention, formability, thermal stability, dimensional stability, and cutting processability have occurred. In order to solve the above problems, the purpose of this is to make it convenient to apply to LED lighting or to display fields such as LED TVs or monitors by using a three-layered back cover for LED lighting with a reflective function and its manufacturing method. I put it.

In order to achieve the above object, the present invention is a bind resin formed by mixing 200 g of polymer beads having a diameter of 5 to 100 μm, 3,000 g of epoxy resin and 1,000 g of urethane resin, and 3,000 g to A coating polymer bead composition step of mixing 4,000 g, 300 g of a curing agent and 100 g of a catalyst and stirring for 20 minutes to obtain a coating polymer bead; Put a reflective film under any of polypropylene, polyethylene terephthalate, and polycarbonate with a thickness of 80 to 500 µm into a coating machine, coat polymer beads with 5 to 120 µm, A polymer bead coating step of heating at a temperature of °C for 3 minutes; An adhesive composition step of adding 500 g of a curing agent and 100 g of a catalyst to 5,000 g of epoxy resin and stirring for 15 minutes to obtain an adhesive; A polyethylene film adhesive application process in which a polyethylene film having a thickness of 30 to 300 μm is put into a coating machine, and the adhesive formed in the adhesive composition process is applied to one side of the polyethylene film in a thickness of 0.5 to 10 μm. ; A polyethylene film laminating process of integrally bonding a polyethylene film to which an adhesive is applied in the polyethylene film adhesive application process to a reflective film coated with a polymer bead on the surface in the polymer bead coating agent coating process; A first aging step of aging a double-structured reflective film in which a polyethylene film is integrally bonded in the laminating step for 6 hours at a temperature of 45°C; An aluminum sheet adhesive coating step in which an aluminum sheet having a thickness of 50 to 500 μm is put into a coating adhesive machine, and the adhesive obtained in the adhesive composition step is applied at 0.5 to 10 μm; In the aluminum sheet adhesive application process, the aluminum sheet to which the adhesive is applied is integrally bonded to the polyethylene film integrally bonded with the reflective film in the polyethylene film laminating process to form a triple structure. And an aluminum sheet laminating process for heating at a temperature of 160° C. for 5 minutes; Secondary aging by aging for 36 hours at a temperature of 50°C in a state where an aluminum sheet is integrally bonded to a polyethylene film integrally bonded with a reflective film in the aluminum sheet lamination process Process; This is a lighting back cover completion process that completes the lighting back cover by cutting the triple-structured reflective film completed by the above process according to the purpose of use or molding it on a molding machine.It has a reflective function by forming a polymer bead coating layer on the surface. To obtain a back cover for LED lighting with a triple structure in which the enclosed film, polyethylene film and aluminum foil are integrated.

The above-described inventor's triple structure LED back cover (Back Cover) for light and slim reflective film or back cover used in the field of lighting and display, while reducing shape retention, formability, thermal stability, dimensions Stability and cutting processability are improved, creating a new effect that is convenient to apply to LED lighting or display fields such as LED TVs and monitors.

1 is a process diagram according to the practice of the present invention.
Figure 2 is a cross-sectional view showing the structure of the film manufactured by the present invention.

Detailed contents for carrying out the present invention will be described as follows.

<Example 1>

Coating polymer beads composition process;

Bisphenol A diglycidyl ether (DGEA: Diglycidyl ether of polymethyl methacrylate) or polybutyl methacrylate (polybutyl methacrylate) in 200 g of polymer beads with a diameter of 5 to 100㎛ bisphenol A) or bisphenol F diglycidyl ether (DGEF: Diglycidyl ether of bisphenol F), bisphenol A diglycidyl ether (DGEA: Diglycidyl ether of bisphenol A) 0 to 1 part by weight of bisphenol F 3,000 g to 4,000 of a bind resin made by mixing 3,000 g of epoxy resin and 1,000 g of urethaneresin, which is a mixture of 0 to 0.5 parts by weight of diglycidyl ether of bisphenol F (DGEF). g, Adipic dihydrazide (ADH), hexahydro-4-methylphthalic anhydride (MHHPA: Hexahydro-4-methylphthalic anhydride), dicyandiamide (DICY: Dicyandiamide) in any one of the curing agent 300 g , Imidazole (2MZ-A:2,4-diamino-6[2'methylimidazolyl-(1')]-ethyl-s-triazine), triphenylphosphine (TPP:Triphenylphosphine), hexafluoroantimonate ( BPH: hexafluoroantimonate) is mixed with 100 g of a catalyst and stirred for 20 minutes to obtain polymer beads for coating.

Here, the ideal is that the polymer beads have a diameter of 35 μm.

At this time, the composition weight ratio of the solid content of the coating polymer beads is 0.1 parts by weight to 0.9 parts by weight of the curing agent, 0.01 parts by weight to 0.1 parts by weight of the catalyst, and 0.01 parts by weight to 0.1 parts by weight of the polymer beads. Will not do.

Polymer bead coating process;

Put a reflective film under any of polypropylene, polyethylene terephthalate, and polycarbonate with a thickness of 80~500㎛ into the coating machine and apply the polymer bead coating layer to 5~ under a winding speed of 5M/sec. It is coated with 120 μm and heated at 180° C. for 3 minutes.

Here, it is most suitable to use a polymer bead coating layer of 40 μm.

The reflective film used at this time is the most suitable reflective film of 300 μm thick polyethylene terephthalate.

Adhesive composition process;

One or both of bisphenol A diglycidyl ether (DGEA: Diglycidyl ether of bisphenol A) or bisphenol F diglycidyl ether (DGEF: Diglycidyl ether of bisphenol F) ether of bisphenol A) 0 to 1 part by weight of bisphenol F diglycidyl ether (DGEF: Diglycidyl ether of bisphenol F) 0 to 0.5 parts by weight of a mixture of epoxy resin (Epoxyresin) 5,000 g of adipic dihydrazide (ADH:Adipic dihydrazide), MHHPA (Hexahydro-4-methylphthalic anhydride), dicyandiamine (DICY: Dicyandiamine) any one of 500g, imidazole (2MZ-A:2,4-diamino-6[2') Add 100 g of a catalyst made of any one of methylimidazolyl-(1')]-ethyl-s-triazine), triphenylphosphine (TPP), or hexafluoroantimonate (BPH), and stir for 15 minutes. Get

Polyethylene film adhesive application process;

A polyethylene film having a thickness of 30 to 300 μm is put into a coating machine, and the adhesive prepared in the adhesive composition process is applied to a thickness of 0.5 to 10 μm on one side of the polyethylene film at a winding speed of 5 M/sec.

The thickness of the polyethylene film used here is the most suitable 150㎛, and the thickness of the adhesive applied at this time is the best 3㎛.

Polyethylene film lamination process;

In the polyethylene film adhesive application process, the polyethylene film to which the adhesive is applied is integrally bonded to the reflective film coated with polymer beads on the surface in the polymer bead coating agent coating process.

1st aging process;

In the laminating process, a double-structure reflective film in which a polyethylene film is integrally bonded is aged for 6 hours at a temperature of 45°C.

Aluminum sheet adhesive application process;

An aluminum sheet having a thickness of 50 to 1000 μm is put into a coating adhesive machine, and the adhesive obtained in the adhesive composition process is applied at 0.5 to 10 μm under a winding speed of 5 M/sec.

Here, it is most suitable that the thickness of the aluminum sheet is 100 μm, and the thickness of the adhesive to be applied is preferably 5 μm.

Aluminum sheet lamination process;

In the aluminum sheet adhesive application process, the aluminum sheet to which the adhesive is applied is integrally bonded to the polyethylene film integrally bonded with the reflective film in the polyethylene film laminating process to form a triple structure. And heated for 5 minutes at a temperature of 160°C.

Secondary aging process;

In the aluminum sheet laminating process, an aluminum sheet is integrally bonded to a polyethylene film integrally bonded with a reflective film and aged for 36 hours at a temperature of 50°C.

Lighting back cover completion process;

The reflective film of the triple structure completed by the above process is cut according to the purpose of use or formed in a molding machine to complete a back cover for lighting.

By performing the above-described process, a polymer bead coating layer 10 is formed on the surface, and an adhesive layer 30 is formed on the back surface of the reflective film 20 so that the polyethylene film 40 is integrated. It adheres to the polyethylene film 40 and forms an adhesive layer on the surface of the polyethylene film 40 to integrally adhere the aluminum foil 50 to form a polymer bead coating layer 10 on the surface. The film 20, the polyethylene film 40, and the aluminum foil 50 are integrated to complete a three-layered LED lighting back cover.

Since the embodiments of the present invention are provided only for the purpose of more completely describing the present invention to those with average knowledge in the art, it is construed that the scope of the present invention is limited to the described embodiments. No, it will be self-evident.

The present invention described above can be applied in manufacturing as a back cover of an LED TV, a computer monitor, and an LED lighting fixture, etc. It will be said that the industrial use value is great.

10: polymer bead coating layer
20: film with reflective function
30: adhesive layer
40: polyethylene film
50: aluminum sheet

Claims (7)

By mixing 200 g of polymer beads with a diameter of 5 to 100 μm, 3,000 g of epoxy resin and 1,000 g of urethane resin, 3,000 g to 4,000 g of bind resin, 300 g of curing agent, and 100 g of catalyst are mixed. A coating polymer bead composition step of stirring for 20 minutes to obtain a coating polymer bead;
Put a reflective film under any of polypropylene, polyethylene terephthalate, and polycarbonate with a thickness of 80 to 500 µm into a coating machine, coat polymer beads with 5 to 120 µm, A polymer bead coating step of heating at a temperature of °C for 3 minutes;
An adhesive composition step of adding 500 g of a curing agent and 100 g of a catalyst to 5,000 g of epoxy resin and stirring for 15 minutes to obtain an adhesive;
A polyethylene film adhesive application process in which a polyethylene film having a thickness of 30 to 300 μm is put into a coating machine, and the adhesive formed in the adhesive composition process is applied to one side of the polyethylene film in a thickness of 0.5 to 10 μm. ;
A polyethylene film laminating process of integrally bonding a polyethylene film to which an adhesive is applied in the polyethylene film adhesive application process to a reflective film coated with a polymer bead on the surface in the polymer bead coating agent coating process;
A first aging step of aging a double-structured reflective film in which a polyethylene film is integrally bonded in the laminating step for 6 hours at a temperature of 45°C;
An aluminum sheet adhesive application step of applying an aluminum sheet having a thickness of 50 to 500 μm to a coating adhesive machine and applying the adhesive obtained in the adhesive composition step to 0.5 to 10 μm;
In the aluminum sheet adhesive application process, the aluminum sheet to which the adhesive is applied is integrally bonded to the polyethylene film integrally bonded with the reflective film in the polyethylene film laminating process to form a triple structure. And an aluminum sheet laminating process for heating at a temperature of 160° C. for 5 minutes;
Secondary aging by aging for 36 hours at a temperature of 50°C in a state where an aluminum sheet is integrally bonded to a polyethylene film integrally bonded with a reflective film in the aluminum sheet lamination process Process;
A method for manufacturing a back cover for LED lighting of a triple structure, characterized in that it consists of a back cover completion process for lighting that completes the back cover for lighting by cutting the reflective film of the triple structure completed by the above process according to the purpose of use or molding in a molding machine. An adhesive layer 30 is formed on the back surface of the film 20 having a reflective function in which a polymer bead coating layer 10 is formed on the surface, and the polyethylene film 40 is integrally bonded to the polyethylene film. Film 20 and polyethylene with reflective function formed by forming an adhesive layer on the surface of 40 to integrally bond aluminum foil 50 to form a polymer bead coating layer 10 on the surface. (polyethylene) film (40) and aluminum (aluminium) foil (50) is a three-layered LED lighting back cover, characterized in that the integral. The method of claim 1,
The polymer bead is a method for manufacturing a back cover for LED lighting of a triple structure, characterized in that one of polymethyl methacrylate or polybutyl methacrylate. The method of claim 1,
The epoxy resin is one or both of bisphenol A diglycidyl ether DpGEA: Diglycidyl ether of bisphenol A) or bisphenol F diglycidyl ether DpGEF: Diglycidyl ether of bisphenol F). Diglycidyl ether of bisphenol A (DGEA) 0 to 1 parts by weight of bisphenol F diglycidyl ether (DrGEF: Diglycidyl ether of bisphenol F) 0 to 0.5 parts by weight of a triple structure characterized in that the mixture Manufacturing method of back cover for LED lighting. The method of claim 1,
The curing agent is a bind resin composed by mixing 3,000 g of urethane resin (1,000 g), 3,000 g to 4,000 g, adipic dihydrazide (ADH), hexafluoroantimonate (MHHPA: Hexahydro- 4-methylphthalic anhydride), dicyandiamide (DICY: Dicyandiamide), characterized in that any one of the three-layer structure LED lighting back cover manufacturing method. The method of claim 1,
The catalyst is imidazole (2MZ-A:2,4-diamino-6[2'methylimidazolyl-(1')]-ethyl-s-triazine), triphenylphosphine (TPP), hexafluoroantimo Nate (BPH: hexafluoroantimonate), characterized in that any one of the three-layer structure LED lighting back cover manufacturing method. The method of claim 1,
The coating polymer beads, characterized in that the solid content weight composition weight ratio is 0.1 parts by weight to 0.9 parts by weight of the curing agent, 0.01 parts by weight to 0.1 parts by weight of the catalyst, 0.01 parts by weight to 0.1 parts by weight of the polymer beads to 1 part by weight of the binder resin. Method for manufacturing a back cover for LED lighting with a triple structure,

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