WO2013019037A2

WO2013019037A2 - Method for manufacturing a reflective film and reflective film manufactured thereby

Info

Publication number: WO2013019037A2
Application number: PCT/KR2012/006026
Authority: WO
Inventors: 정광춘; 조현남; 조남부; 진석필; 박광진; 권혁환; 임태호; 진선미; 이돈신
Original assignee: 주식회사 잉크테크
Priority date: 2011-07-29
Filing date: 2012-07-27
Publication date: 2013-02-07
Also published as: KR20130014231A; WO2013019037A3

Abstract

The present invention relates to a method for manufacturing a reflective film and a reflective film manufactured thereby. The method for manufacturing the reflective film includes a step of forming an adhesive pattern layer by patterning an adhesive in a predetermined shape on a reflective layer.

Description

Specification

Name of the Invention: Manufacturing Method of Reflective Film and Reflective Film Manufactured By It

[1] The present invention relates to a method of manufacturing a reflective film that forms an adhesive pattern layer by a pattern printing method, and a reflective film produced thereby.

[2]

Background

[3] mobile phones, LCD TVs, LED TVs, electronic devices used in everyday life,

Back light units for TFT-LCDs, which are applied to navigation systems, are becoming increasingly cheaper and higher in brightness as their usage increases and develops.

[4] films with high reflective performance are used to improve the performance of the backlight unit.

There is also a need for metal thin films that can be thinned for laptops, mobile phones, LED TVs and LCD TVs and have excellent optical properties.

[5] The conventional production of reflective films is based on silver deposition or sputtering.

In Japanese Patent Publication No. 2008-009006, a metal thin film was formed using a deposition method.

[6] Japanese Unexamined Patent Publication No. 2002-129259, et al.

It is known to form a highly reflective film by vacuum deposition.

Manufacture of reflective film through lamination on support body after vacuum deposition using metal with high reflectivity (Ag), aluminum (A1), nickel (Ni), rhythm (Rh), etc. on the surface of flexible substrate such as PET In the case of vacuum deposition, a high vacuum chamber is required, the material shape and size are limited, coating thickness is uneven, and the cost of equipment is high.

[7] In addition, there is a high price limit when judging from the low yields and slow speeds of the deposition process and high equipment costs.

[8] Therefore, the present inventors have made great efforts to solve these problems, and have successfully reached the present invention. In other words, the present invention formed a metal thin film manufactured by the coating method and secured weather resistance through surface treatment. The adhesive printing resulted in a laminating process that developed a weather-resistant reflective film that can maintain high reflectivity and brightness.

[9] In addition, when manufacturing reflective films using conventional casting methods, organic matters on the reflecting surface cause problems such as reduced brightness and reflectance and an increase in yellow index, and oxidation of silver cannot be prevented without a protective layer. Japanese Patent Publication No. 2005-280131 manufactures a weather-resistant reflective film with a weather-resistant resin layer.However, improving weather resistance with a resin layer can reduce the reflection rate and the occurrence of yellowing, but when evaluating long-term weather resistance There is a lack in [10]

Detailed description of the invention

Technical task

[11] The purpose of the present invention is to print an air gap by printing an adhesive in a pattern printing method.

It is to provide a method of manufacturing a reflective film that can maintain a high reflectance and brightness, and a reflective film produced thereby.

[12]

Task solution

[13] The present invention provides a method of manufacturing a reflective film, the method comprising forming an adhesive pattern layer on which the adhesive is patterned in a predetermined pattern on the reflective layer.

to provide.

[14] The present invention provides a reflective film produced by the above production method.

[15] The present invention provides a backlight unit including a reflective film.

[16]

Effects of the Invention

According to the present invention, as the adhesive pattern layer is formed on the reflective layer by a pattern printing method, there is provided a method of manufacturing a reflective film having excellent optical characteristics and brightness, and a reflective film produced by the same.

[18]

Brief description of the drawings

1 is a cross-sectional view of a reflective film according to the present invention.

2 is a photograph of a reflective film according to the present invention (showing line widths and open area spacing).

3 is a diagram showing an example of an adhesive pattern layer of a reflective film according to the present invention.

[22]

Mode for Carrying Out the Invention

The manufacturing method of the reflective film which concerns on this invention includes forming the adhesive pattern layer which patterned the adhesive agent in the predetermined pattern on the reflection layer.

The method may further include preparing a protective film on the adhesive pattern layer.

In the preparing of the protective film, the adhesive pattern layer and the protective film may be laminated using a laminator.

[26] The protective film is polyethylene terephthalate (PET),

Polyethylene naphthalate (PEN), polyethersulfone (PES), nylon (Nylon), polytetrafluoroethylene (PTFE), polycarbonate (PC), cellophane (Cellophane), polyarylate (PAR), and polyimide ( It may be the film selected in PI).

[27] The thickness of the protective film may be 10 to 200 / kg. For example, the thickness of the protective film may be 12, 19jum, 25 / im, 38 ιη, 50μϊα, 75 卿, 100 ^ m, 125 ^ m, 188 ^ ιη. Can be varied.

The reflective layer may be a white reflective layer containing a white pigment. The adhesive may be one or more adhesives selected from acrylic, polysiloxane, and polyester adhesives.

[30] The adhesive agent based on 100 parts by weight of the total, 5 to 50 parts by weight of the adhesive solids,

0.01 to 1 part by weight of inorganic fillers and 49 to 96 parts by weight of solvents can be included. When added in the above ranges, excellent optical properties and adhesion can be provided, and the optical properties and adhesion may be degraded if they are too small or too large. have

As the adhesive solid, at least one selected from an acrylic resin, a polysiloxane resin, and a polyester resin can be used.

[32] The inorganic filler may include one or more selected from A1 ₂ 0 ₃ , Si0 ₂ , and Ti0 ₂ · !:

have.

The adhesive pattern layer may be formed as a linear pattern, a polygonal pattern, or a mixed pattern thereof.

[34] The polygonal pattern includes a hexagon mesh (Honeycomb), a square mesh, a circle,

It may be a triangular mesh, or a mesh pattern in which they are mixed. 、.

As described above, the adhesive pattern layer may have a linear shape or a polygonal shape. One linear pattern can be sporadic or regular arrays, or a continuous form in which the linear patterns can be connected or unconnected, and can be mesh shapes as polygons, specifically Hexcomb, square mesh, or ^' circular ( Dots, triangular meshes, or mixed mesh patterns of these forms. Each corner area of a triangular mesh or square mesh may be partially cut to form a deformed mesh pattern. As such, the pattern of the adhesive pattern layer is continuous The shape of the adhesive pattern layer is not limited to this and can be varied in many ways.

The pattern may have a line width of 0.1 to 5000. When the line width is in the range

Excellent optical properties can be provided and adhesion may be degraded if the line width is too thin.

The air gap of the pattern may be 100 to 10000. Here, the air layer is a space formed by the height of the actual pattern on the basis of the cross section and is formed between the adhesive pattern layer and the protective film and is formed by the air layer. Luminance can be improved.

[38] The adhesive pattern layer may include direct gravure printing,

Flexography Printing, Gravure Offset,

The adhesive may be formed by printing the adhesive by a method selected from Imprint, Lithography printing, Screen Printing, and Rotary screen printing.

[39] A surface treatment agent comprising at least one selected from a silane coupling agent and an acid compound between the reflective layer and the adhesive pattern layer.

The method may further include forming a surface treatment layer. The surface treating agent may be prepared by adding a solvent to at least one selected from a silane coupling agent and an acid.

For example, based on 100 parts by weight of the surface treating agent, at least one selected from a silane compound and an acid compound is added at 0.005 to 50 parts by weight as the silane coupling agent. The solvent may be prepared by adding 50 to 99.995 parts by weight. When added in the above range can provide an excellent antioxidant effect, if too much less than the addition amount may be lowered the antioxidant effect in too many cases.

[42] Here, the silane compound and the acid compound may be used or mixed, respectively, when the silane compound is added alone, 0.005 to 50 parts by weight may be added, and when the acid compound is added alone, 0.01 to 50 Parts by weight may be added. When the silane compound and / or the acid compound are added in the above range, excellent optical properties may be provided, and when the amount of the silane compound and / or the acid compound is added too small or too much, the optical properties may be degraded.

[43] 3-Mercaptopropyltrimethoxysilane as the silane coupling agent,

Methyltrimethoxysilane, TetraEthoxysilane, Trimethylorthosilicate,

Methyltriethoxysilane, Dimethyldimethoxysilane, Propyltrimethoxysilane,

At least one silane compound selected from propyltriethoxysilane, trimethoxy (octadecyl) silane, Isobutyltrimethoxysilane, Isobutyltriethoxysilane, Phenyltrimethoxysilane, and n-Octyltriethoxy silane may be used.

As the acid compound, at least one acid compound selected from Oleic acid, Neodecanoic acid, Valeric acid, Laurie acid, Malvalic acid, Decanoic acid, Butyric acid, and Heptanoic acid may be used.

The solvent may be one or more selected from acetone, MEK, MIBK, MAK, toluene, xylene, mehanol, ethanol, isopropanol, and n-butanol.

The surface treating agent may further include an inorganic filler to improve optical properties.

The inorganic filler may use at least one selected from MgO, ZnO, Si0 ₂ , and Ti0 ₂ .

For example, the surface treating agent may include a silane coupling agent and

At least one selected from the acid and the inorganic filler, may be prepared by adding a solvent.

Based on 100 parts by weight of the surface treating agent, at least one selected from the silane coupling agent and the acid is added at 0.005 to 50 parts by weight, and the inorganic filler is 0.01 to 0.1% by weight. Part by weight, and the solvent may be prepared by adding 49.9 to 99.998 parts by weight.

[50] The surface treatment layer may include a microgravure coating, a gravure coating, a flexo coating, a spin coating, a slot die coating, Lip coating, and spray coating The surface treatment agent may be formed using a method selected from among.

In addition, the present invention can provide a reflective film produced by the manufacturing method.

Such a reflective film is, for example, Figure 1 and the white reflective layer, the adhesive pattern layer,

It may be composed of a protective film, it may be further provided with a surface treatment layer.

The present invention can provide a backlight unit including the reflective film.

The reflective film may be applied to various display devices, for example.

It can be used as a reflective film of the backlight unit of the display device.

Hereinafter, the manufacturing method of the reflective film will be described in detail.

[56] forming a pattern adhesive layer on a white reflective film, which is a white reflective layer; pattern adhesive on the reflective film comprises directing an adhesive layer including acrylic co-polymer, polysiloxane resin, or polyester resin. Direct gravure printing, flexography printing, gravure offset, imprint, lithography printing, screen printing, rotary screen printing, etc. The method may include providing an adhesive layer in a pattern form; laminating to provide a protective PET.

[57] The manufacturing method of the white reflective film is formed by mixing white pigment with synthetic resin

It is made by producing a plurality of fine hollow holes inside the synthetic resin and film-forming or white synthetic resin film and applying silica, zirconia, calcium carbonate, magnesium carbonate and the like. The method of forming the hollow hole includes a method of impregnating an inert gas with a polyester film or the like, or mixing a resin which is not compatible with polyester, a method containing inorganic particles such as silica and barium sulfate.

[58] The synthetic resins include polyester resins, polystyrene resins, polystyrene resins, polypropylene resins, polyether resins, polyurethane resins,

General synthetic resins such as polyvinyl chloride resin, polyvinyl acetate resin, acrylic resin, epoxy resin and cellulose resin can be used.

Polyester resins, such as polyethylene terephthalate, can be used. A UV blocker may also be included to prevent yellowing to the light source.

[59] The adhesive pattern layer may include direct gravure printing,

Flexography Printing, Gravure Offset,

Imprint, lithography printing, screen printing, rotary screen printing, etc. can be provided in a pattern form.

The pattern may be processed by priming a hexagonal mesh (Honeycomb), a square mesh, a dot (Dot), a triangular mesh, irregular lines, a combination of points and a mesh form in which the aforementioned shapes are mixed. The pattern of the adhesive pattern layer, the line width can be processed from 0.1 卿 ~ 5000, and the distance between the lines can be produced from 100 ΛΠ ~ OOOOjum. The height can be produced in 0.0 um ~ 5 / / m, preferably from 0.05 to 3 can be produced.

[62] The composition of the adhesive layer is based on 100 parts by weight of the total adhesive layer composition.

10 to 30 parts by weight of an adhesive solid, 0.01 to 1 part by weight of an inorganic filler, and 89.99 to 69 parts by weight of a solvent may be prepared.

The adhesive may be made of acrylic co-polymer, polydimethyl siloxane gum, methyl vinyl siloxane gum, polyester, adhesive, or the like.

Inorganic fillers contained in the adhesive layer may be used in combination with A1203, S102, ΤΪ02, and the like.

[65]

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto.

[67] Apocrypha Example 1

As a white reflective layer, E6SR was used as a white reflective film commercialized by Toray Advanced Materials (TAK).

[69] The adhesive includes 17.5 parts by weight of acrylic co-polymer type adhesive and butyl glycol acetate.

40 parts by weight, was prepared by mixing with 42.5 parts by weight of butyl acetate. This adhesive was printed on the white reflective film by direct gravure printing in nine types according to line width, open area and pattern shape.

Subsequently, the protective film was laminated with polyethylene terephthalate (PET) 12 in a continuous process.

[71] Apocrypha Example 2

[72] The white reflective film was commercialized in Toray Advanced Materials (TAK) using E6SR.

The adhesive was prepared by mixing 25 parts by weight of polyester type adhesive, 20 parts by weight of MEK, 20 parts by weight of butyl acetate, and 35 parts by weight of butyl glycol acetate. The adhesive was printed on the surface treatment layer by direct gravure printing in nine types according to the line width, open area and pattern shape.

Subsequently, the protective film was laminated with polyethylene terephthalate (PET) 12 kPa in a continuous process.

[75] Acute Example 3

[76] White reflective film was commercialized in Toray Advanced Materials (TAK) using E6SR.

[77] The adhesive includes 15 parts by weight of polysiloxane type adhesive, 50 parts by weight of xylene, and toluene

It was prepared by mixing to 35 parts by weight. Apply this adhesive on the surface treatment layer

Direct gravure printing was used to print 9 types according to line width, open area and pattern shape. The protective film was then laminated with polyethylene terephthalate (PET) 12 in a continuous process.

[79] Comparative Example 1

The white reflective film used E6SR as a commercialized product in Toray Advanced Materials (TAK).

[81] The adhesive was prepared by mixing 11 parts by weight of an acrylic co-polymer type adhesive, 50 parts by weight of butyl glycol acetate and 39 parts by weight of butyl acetate. 12 rolls were laminated.

[82] Comparative Example 2

[84] The adhesive was added in an amount of 20 parts by weight of a polyester type adhesive, 20 parts by weight of MEK,

It was prepared by mixing 20 parts by weight of butyl acetate and 40 parts by weight of butyl glycol acetate. The adhesive was subjected to microgravure coating to obtain a protective film.

Polyethylene terephthalate (PET) l ffli laminated.

[85] Comparative Example 3

The adhesive was then prepared by mixing 11 parts by weight of a polysiloxane type adhesive, 50 parts by weight of xylene, and 39 parts by weight of toluene. ) Was laminated to 25 m.

In the following, the compositions of the layers in the Examples and Comparative Examples are summarized in [Table 1].

Table 2 summarizes the optical characteristic results of each Example and Comparative Example.

[Table 1]

[ ⁹ teeth

[Table 2] [92]

[Description of the code]

10: white reflective layer 20: adhesive layer (pattern)

30: Protective film (PET)

Claims

Claim

Method of producing a reflective film of an adhesive on the reflection layer, characterized in that it comprises a predetermined ^'forming a patterning the adhesive pattern layer with a pattern.

The method according to claim 1,

Method for manufacturing a reflective film, characterized in that it further comprises the step of providing a protective film on the adhesive pattern layer.

The method according to claim 2,

In the step of providing the protective film

Method of manufacturing a reflective film, characterized in that for laminating the adhesive pattern layer and the protective film using a laminator. The method according to claim 2,

The protective film, polyethylene terephthalate (PET),

Polyethylenenaphthalate (PEN), polyethersulfone (PES),

Nylon, polytetrafluoroethylene (PTFE),

A method for producing a reflective film, characterized in that the film is selected from polycarbonate (PC), cellophane (Cellophane), polyarylate (PAR), and polyimide (PI).

The method according to claim 2,

The thickness of the protective film is characterized in that 10 ~ 200 / m

Manufacturing Method of Reflective Film.

The method according to claim 1,

The reflective layer is a method of manufacturing a reflective film, characterized in that the white reflective layer containing a white pigment.

The method according to claim 1,

The adhesive is acrylic, polysiloxane, and

A method for producing a reflective film, characterized in that at least one adhesive selected from polyester adhesives is used. The method according to claim 1,

Said adhesive, based on 100 parts by weight of the total, 5 to 50 parts by weight of the adhesive solids, inorganic filler 0. 2 ~ 1 parts by weight, and 49-96 parts by weight of the solvent manufacturing method of the reflective film.

The method according to claim 8,

As the adhesive solid content, at least one selected from an acrylic resin, a polysiloxane resin, and a polyester resin is used.

The method according to claim 8, The inorganic filler is a method for producing a reflective film, characterized in that it comprises at least one selected from A1 ₂ 0 ₃ , Si0 ₂ , and Ti0 ₂ .

[Claim 11] In claim 1,

The adhesive pattern layer is a manufacturing method of a reflective film, characterized in that formed in a linear pattern, a polygonal pattern or a mixed pattern thereof.

Claim 12 The method according to claim 11,

The polygonal pattern is a hexagonal mesh (Honeycomb), a square mesh, a circular (Dot), a triangular mesh, or a mesh pattern of the mixed form, characterized in that the manufacturing method of the reflective film.

Claim 13 In claim 1,

The pattern is a method for producing a reflective film, characterized in that the line width is 0.1 μα ~ 5000.

Claim 14 The method according to claim 1,

An air gap of the pattern is a manufacturing method of a reflective film, characterized in that 100 ~ 10000 / 加加.

Claim 15 The method of claim 1,

The adhesive pattern layer may include direct gravure printing, flexography printing, and gravure printing.

Gravure offset, Imprint, Lithography

A method of manufacturing a reflective film, characterized in that formed by printing the adhesive by a method selected from printing (Lithography printing), screen printing, and rotary screen printing.

[Claim 16] In Claim 1,

And forming a surface treatment layer between the reflective layer and the adhesive pattern layer with a surface treatment agent including at least one selected from a silane coupling agent and an acid compound. Manufacturing method of reflective film.

Claim 17 In Claim 16,

The additive surface treatment agent is prepared by adding a solvent to at least one selected from the above silane coupling agent and acid compound.

Based on 100 parts by weight of the surface treating agent, at least one selected from the silane coupling agent and the acid compound is added to 0.005 to 50 parts by weight, and the solvent is prepared by adding 50 to 99.995 parts by weight. Method for producing a reflective film characterized in that.

Claim 18 In Claim 16, ¾ ^" silane coupling agent,

3-Mercaptopropyltrimethoxysilane, Methyltrimethoxysilane,

TetraEthoxysilane, Trimethylorthosilicate, Methyltriethoxysilane, Dimethyldimethoxysilane, Propyltrimethoxysilane,

Propyltriethoxysilane, Trimethoxy (octadecyl) silane,

Isobutyltrimethoxysilane, Isobutyltriethoxysilane,

A method for producing a reflective film, comprising at least one silane compound selected from phenyltrimethoxysilane and n-Octyltriethoxysilane.

The method according to claim 16,

The acid (acid) compound, Oleic acid, Neodecanoic acid, Valeric acid, Laurie acid, Malvalic acid, Decanoic acid, Butyric acid, and Heptanoic acid production method for producing a reflective film, characterized in that it comprises at least one .

The method according to claim 16,

The surface treatment agent, a method for producing a reflective film, characterized in that it further comprises an inorganic filler.

The method of claim 20,

The surface treating agent is prepared by adding a solvent to at least one selected from the silane coupling agent and the acid compound and the inorganic filler,

Based on 100 parts by weight of the surface treating agent, at least one selected from the silane coupling agent and the acid compound is added in an amount of 0.005 to 50 parts by weight, and the inorganic filler is added in an amount of 0.01 to 0.1 parts by weight. And 49.9 to 99.998 parts by weight of the solvent.

The method according to claim 20,

The inorganic filler is a method of manufacturing a reflective film, characterized in that it comprises at least one selected from MgO, ZnO, Si0 ₂ , and Ti0 ₂ .

The method according to claim 16,

The surface treatment layer may include a microgravure coating, a gravure coating, a flexo coating, a spin coating, a slot die coating, a lip coating. ), And a method of manufacturing a reflective film, characterized in that formed by the surface treatment agent using a method selected from spray coating.

Claim 1 to 23, the reflective film produced by the manufacturing method according to any one of the. 25. A backlight unit comprising the reflective film according to claim 24.