KR101644860B1 - A adhesive tape for panel and a method for producing the same - Google Patents

Abstract

The present invention relates to a panel tape and a method of manufacturing the same, and the adhesive or the tape including the adhesive tape manufactured by the present invention has excellent light shielding property, waterproof property, heat resistance property and heat radiation property.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a tape for a panel,

The present invention relates to a tape for a panel and a method of manufacturing the same. More specifically, the present invention relates to a panel tape having a light shielding property, a waterproof property, a heat resistance, and a heat radiation property, and a method of manufacturing the same.

As the number of mobile touch phones equipped with a touch screen has increased dramatically, the touch screen market is rapidly expanding into a wide range of applications, thanks to its large growth rate. In addition to industrial applications such as ATMs and kiosks, touchscreens are also rapidly growing in the size of mobile phones, PDAs, and navigation devices. Technological targets mainly pursued for such electronic devices include thinning, lightening, low power consumption, high resolution and high brightness.

The display mode is classified into two types, LCD and OLED. The touch screen is attached using an adhesive tape which can be attached to an LCD or an OLED. The LCD module minimizes various fixing brackets for attaching an LCD panel to reduce the manufacturing cost of the LCD backside site, and can be applied to the development of slim LCD panels by using a thin adhesive product. Such an attempt should ultimately be free of light springs.

In addition to the temperature change due to the internal heat of the conductive heat and the convection heat conducted to the LCD panel and the guide panel when using the light source for emitting light, in addition to the temperature change due to the external heat of about -20 to 60 캜 which is the operating temperature condition of the LCD display panel Thermal deformation occurs, and the adhesive products to be used for fixation between the LCD panel and the guide panel are lifted. Further, Japanese Patent Application Laid-Open No. 2006-259815 discloses a technique of interposing a polymer material spacer between adhesive layers and controlling the modulus of elasticity of the upper and lower adhesive layers. However, when a polymer material is interposed between the pressure-sensitive adhesive layers, the elastic modulus lowers and the pressure-sensitive adhesive easily deforms, so that the restoring force is seriously deteriorated.

In the process of manufacturing, storing, transporting and selling, the touch screen or touch panel is exposed to various environments. Especially when exposed to harsh conditions such as high temperature and high humidity conditions, Serious damage or failure may result.

For the above reasons, various measures have been considered in order to compensate the adhesive force of the adhesive tape to fix the adhesive between the LCD panel and the guide panel and solve the problem of deformation due to heat.

It is an object of the present invention to provide a panel tape and a method for manufacturing the same.

SUMMARY OF THE INVENTION The present invention is directed to a panel tape having improved light-shielding properties, waterproof properties, heat resistance, and heat radiation properties.

Other objects and advantages of the present invention will become more apparent from the following detailed description of the invention and claims.

Various embodiments described herein are described with reference to the drawings. In the following description, for purposes of complete understanding of the present invention, various specific details are set forth, such as specific forms, compositions, and processes, and the like. However, certain embodiments may be practiced without one or more of these specific details, or with other known methods and forms. In other instances, well-known processes and techniques of manufacture are not described in any detail, in order not to unnecessarily obscure the present invention. Reference throughout this specification to "one embodiment" or "embodiment" means that a particular feature, form, composition, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Accordingly, the appearances of the phrase " in one embodiment "or" the embodiment "in various places throughout this specification are not necessarily indicative of the same embodiment of the present invention. In addition, a particular feature, form, composition, or characteristic may be combined in any suitable manner in one or more embodiments.

In one embodiment, the carbon nanostructure used in the present invention includes carbon nanotubes or nanowires, and the carbon nanotubes have high mechanical strength and high mechanical modulus such as Young's modulus and high aspect ratio. The branch is a material having high electrical conductivity and high thermal stability, and the nanowire is about 0.1 to 100 mu m in length and 1 to 100 nm in diameter.

In one embodiment, graphene is one of the carbon isotopes, a two-dimensional structure of a single atomic layer thickness in which carbon atoms are each connected by an sp ² bond, and a benzene-type carbon ring is connected to form a honeycomb structure. Graphene consists of only carbon, which is very stable both structurally and chemically. Also, because graphene has a very small effective mass of electrons in the vicinity of the Fermi level, the rate of electron movement in graphene is nearly equal to the speed of light. Therefore, its electrical properties are excellent. Oxidized graphene has high C / O ratio and large area even after reduction, so it can be used as a waterproof material and a heat dissipation material.

In one embodiment, it is a light shielding material comprising graphene oxide, carbon of 0.5 탆 to 7 탆 in diameter, carbon of 10 nm to 300 nm in diameter, and carbon nanotubes. Preferably, the micro-sized carbon is a light-shielding material including micro-sized carbon and nanosized carbon having a diameter of 1 to 5 mu m and nanosized carbon having a diameter of 30 to 200 nm. By adding carbon nanotubes and graphenes in addition to carbon having a diameter of 0.5 μm to 7 μm and carbon having a diameter of 10 nm to 300 nm, it is possible to improve the thermal conductivity and maximize the heat radiating effect. Further, the use of graphene improves the barrier property and maximizes the water resistance. The light shield is a light shielding material comprising carbon between 10 and 300 nm in diameter between voids between 0.5 mu m and 7 mu m in diameter. The micro-sized carbon contained in the light-shielding material causes pores. Further, by using the nanosized carbon in order to minimize the pores, generation of pores can be minimized. The pores have 5 to 30% of voids as compared with the case of using only carbon having a diameter of 0.5 to 7 m.

Due to the minimization of the voids, the packing density can be increased while enabling efficient light shielding, while minimizing the material content, compared to using only one size of carbon.

In one embodiment, the light shielding material comprising graphene oxide, micro-sized carbon, nanoscale carbon, and carbon nanotubes is characterized by a thickness of 50 to 100 micrometers.

In one embodiment, there is provided a light shield further comprising an acrylic tackifier in a light shield comprising oxide graphene, micro sized carbon, nanoscale carbon, carbon nanotubes, wherein the light shield further comprises a tackifier in the shield material It is a shield.

The pressure-sensitive adhesive refers to at least one pressure-sensitive adhesive selected from the group consisting of acrylic, polyacrylic ester, polyacrylic acid and polymethacrylic acid, polyacrylic acid soda, silicone and polyacrylamide. More preferably an acrylic pressure-sensitive adhesive and a silicon pressure-sensitive adhesive. By using the acrylic pressure-sensitive adhesive, the adhesive force with the material can be further enhanced, and the use of the silicone pressure-sensitive adhesive can reinforce the restoring force and heat resistance.

In one embodiment, a substrate layer comprising a light shielding film on the light shielding referred to in the above embodiment; And a releasing layer.

The base layer is a layer providing a frame so that the adhesive can form a layer, for example, selected from the group consisting of polyethylene terephthalate (PET), stretched polypropylene (OPP), and lead-free (CPP). Preferably PET is used but not limited thereto.

Wherein the substrate layer comprises a base layer coated with a shielding material including an acrylic adhesive on one side of the substrate layer and a substrate layer coated on the opposite side with a shielding material including a silicone adhesive, And a black polyethylene terephthalate (PET) film permeable to 2% or less.

In one embodiment, a spotting composition is provided comprising 1-10 weight percent of a carbon dispersion, 1-10 weight percent of a graft oxide or graphite oxide dispersion, 15-30 weight percent of a dispersion medium, and 70-85 weight percent of a pressure sensitive adhesive. In this embodiment, the present invention provides a spotting composition further comprising 1-10 weight percent of a carbon nanostructure, wherein the carbon dispersion is a mixture of micro sized carbon with a diameter of 0.5 to 7 microns and nanosized carbon with a diameter of 10 to 300 nm Wherein the micro sized carbon is a micro sized carbon having a diameter of from 1 micrometer to 5 micrometers, wherein the nanosized carbon is a nanoscale carbon having a diameter of from 30 nm to 200 nm, Providing a wear composition comprising carbon between 10 and 300 nm in diameter between micro sized carbon pores, wherein the pore is between 5% and 30 < RTI ID = 0.0 > % Of voids, wherein the carbon nanostructure is carbon nanowires or carbon nanotubes, wherein the pressure sensitive adhesive It provides an acrylic or silicone adhesive is that wearing the composition.

In one embodiment, there is provided a pressure sensitive adhesive comprising the spotting composition and a light-shielding material comprising the same. In one embodiment, there is provided a light-shielding tape comprising the light-shielding material, a substrate film comprising a light-shielding film, and a release film.

In one embodiment, a method of making a spotting composition by mixing 1-10 wt% of carbon dispersion, 1-10 wt% of oxidized graphene or oxide graphite dispersion, 15-30 wt% of dispersion medium, and 70-85 wt% of pressure- to provide. In this embodiment, there is provided a method of producing a spotting composition further comprising 1-10% by weight of a carbon nanostructure.

In one embodiment, a spotting composition is prepared by mixing 1-10 wt% of carbon dispersion, 1-10 wt% of oxidized graphene or oxidized graphite dispersion, 15-30 wt% of dispersion medium, and 70-85 wt% of pressure-sensitive adhesive, There is provided a method for manufacturing a tape by coating a composition film with a light-shielding film on a base film and laminating the release film on the base film. In the above specific example, there is provided a tape manufacturing method wherein 1-10 weight% of carbon nanostructure is additionally added in manufacturing the spotting composition, wherein the base film is a black polyethylene terephthalate film in which light is transmitted through 0% to 2% A method of manufacturing a tape comprising a phthalate (PET) film.

The adhesive or tape comprising the adhesive according to the present invention is excellent in light shielding property, waterproof property, heat resistance property and heat radiation property.

Fig. 1 is a structure for a light-shielding waterproof double-sided tape according to one embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to Examples. It will be apparent to those skilled in the art that these embodiments are only for describing the present invention in more detail and that the scope of the present invention is not limited by these embodiments in accordance with the gist of the present invention .

[Example 1]

For light shielding  Manufacture of Adhesive

≪ Example 1 >

(Solid content: 10 wt%, average particle size: 50 nm) and a micro-sized carbon black dispersion solution (SAMYOUNG INK, BK-06, solid content 10 wt%, average particle size: (Methyl ethyl ketone) as a solvent and 1 wt% of carbon nanotubes as a first solvent (methyl ethyl ketone) in an amount of 0.1 wt%, a graphene oxide dispersion solution (trade name: GB-10, solid content 1 wt% , 73.8 wt% of an acrylic pressure-sensitive adhesive (Hanwha, SB-17, solid content: 40%) and a curing agent (Hana Ehwa, SB) were added to the mixed solution at 1000 rpm for 30 minutes with an agitator (IKA, EUROSTAR) -20), and the mixture was stirred with the stirrer at 1000 rpm for 30 minutes to prepare a pressure-sensitive adhesive for light-shielding.

The pressure-sensitive adhesive was coated on black PET (SKC, SB00, 50 탆) using an applicator and dried at 120 캜 for 3 minutes in a drying oven to form a light-shielding adhesive coating layer of 150 탆. Mu m). The opposite side was also coated and laminated in the same manner as above to prepare a light-shielding double-sided tape.

≪ Comparative Example 1 &

The procedure of Example 1-1 was otherwise repeated except that 1.7 wt% of micro-sized carbon black dispersion solution was used instead of micro-sized and nano-sized carbon black dispersing solution.

≪ Comparative Example 2 &

Comparative Example 1, except that a graphene oxide dispersion solution was not used.

The heat radiation, waterproofing and light shielding properties of the double-sided tape produced in Examples 1-1 and 1-2 and the double-sided tape produced in Comparative Examples 1 to 3 were measured and shown in Table 1 below.

division unit Example 1 Comparative Example 1 Comparative Example 2 How to measure radiation W / mK 5.1 3.8 3.2 (One) Waterproof IPX7 IPX7 level IPX7 level - (2) Light shielding 5.0 4.8 4.2 (3)

(1) Heat dissipation test method (measurement of thermal conductivity)

Thermal conductivity was measured by ASTM E 1461 laser flash method.

(2) Waterproof test method

IPX7: Protection against the effects of transient flooding.

Definition: If the enclosure is temporarily submerged in water under standardized pressure and time conditions, there should be no penetration of water in an amount that could cause harmful effects.

● Test method

Second characteristic number Test Methods Test time Exam conditions

IPXN7 Flooding tank
Level on the outskirts:
From the upper end of the perimeter to the surface of the water:
0.15m
From the lower end of the perimeter to the surface of the water:
1m 30 minutes 14.2.7

●14.2.7 Test on second characteristic number 7: Temporary flooding of 0.15 ~ 1m

To ensure that the following conditions are met, the sample is fully immersed in water at the location specified by the manufacturer and tested.

a) For enclosures less than 850 mm in height, the bottom end of the enclosure is located at 1000 mm from the surface of the water.

b) For enclosures with a height of 850 mm or more, the distance from the lower end of the enclosure to the surface shall be 150 mm.

c) The test time is 30 minutes.

d) The water temperature does not differ by more than 5K from the appliance temperature. However, when tests are carried out in the state of charge of the device or in the operating state of the accessories, the changed requirements may be specified in the relevant product standard.

(3) Light shielding test

Optical density (OD) values were measured using an optical densitometer from X-rite.

According to the experimental results, in Example 1 and Comparative Example 1, there was a large difference in the heat dissipation part depending on the presence of the carbon nanotubes. According to the existence of graphene oxide in Example 2 and Comparative Example 2, There was a difference in the waterproof part. As a result, the characteristics of the heat dissipation part appear due to the carbon nanotubes, and the characteristics of the waterproof part are confirmed by the graphen oxide.

Claims (17)

1-10% by weight of carbon black dispersion, 1-10% by weight of graphene oxide, 15-20% by weight of dispersion medium and 70-73.8% by weight of pressure-
1 to 10% by weight of carbon nanostructure,
Wherein the carbon black dispersion is composed of micro-sized carbon black having a diameter of 0.5 to 7 mu m and nanosized carbon black having a diameter of 10 to 300 nm.
delete delete The method according to claim 1,
Wherein the micro-sized carbon black is a micro-sized carbon black having a diameter of 1 탆 to 5 탆.
The method according to claim 1,
Wherein the nano-sized carbon black is a nano-sized carbon black having a diameter of 30 nm to 200 nm.
The method according to claim 1,
And carbon black having a diameter of 10 nm to 300 nm between the pores of the micro-sized carbon black.
The method according to claim 6,
Wherein the voids have only 5% to 30% voids as compared with the case where only carbon black having a diameter of 0.5 탆 to 7 탆 is used.
The method according to claim 1,
Wherein the carbon nanostructure is a carbon nanowire or a carbon nanotube.
The method according to claim 1,
Wherein the pressure sensitive adhesive is an acrylic or silicone pressure sensitive adhesive.
9. A pressure-sensitive adhesive comprising the spot-wearing composition of any one of claims 1 to 9.
A light-shielding material comprising the pressure-sensitive adhesive of claim 10.
A light-shielding tape comprising the light-shielding material of claim 11, a substrate film comprising a light-shielding film, and a release film.
1-10 weight% of carbon black dispersion, 1-10 weight% of graphene oxide, 15-20 weight% of dispersion medium and 70-73.8 weight% of pressure-sensitive adhesive are mixed to prepare a mixture,
The mixture is further mixed with 1-10 wt% of carbon nanostructure,
Wherein the carbon black dispersion comprises micro-sized carbon black having a diameter of 0.5 to 7 占 퐉 and nano-sized carbon black having a diameter of 10 to 300 nm.
delete 1-10 weight% of carbon black dispersion, 1-10 weight% of graphene oxide, 15-20 weight% of dispersion medium and 70-73.8 weight% of pressure-sensitive adhesive are mixed to prepare a mixture,
1-10 wt% of carbon nanostructure is further added to the mixture and mixed to prepare a spotting composition,
The carbon black dispersion is composed of a micro-sized carbon black having a diameter of 0.5 to 7 mu m and a nano-sized carbon black having a diameter of 10 to 300 nm,
The composition is coated on a base film comprising a light shielding film,
And a release film is laminated on the coated substrate film.
delete 16. The method of claim 15,
Wherein the base film comprises a black polyethylene terephthalate (PET) film in which light is transmitted at 0% to 2% or less.

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