KR101596647B1 - Support for display device substrate and method for manufacturing the same - Google Patents

Abstract

The present invention relates to a support for a display device substrate and a method for manufacturing the same. The support includes a non-crosslinked foaming substrate; and a carbon nanotube layer formed on at least one surface of the foaming substrate. The carbon nanotube layer includes carbon nanotubes which form a network structure.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a support for a display element substrate,

The present invention relates to a support for a display element substrate and a method of manufacturing the same.

Carbon nanotubes (CNTs) were first discovered in 1991, and their synthesis, properties, and applications have been actively studied. In addition, it has been confirmed that CNTs are produced by adding transition metals such as Fe, Ni, and Co during the electric discharge, and full-scale research has been started in 1996 by producing a large amount of samples by the laser evaporation method. The CNT is a hollow tube type in which a graphite surface is rounded to a nano-sized diameter. In this case, the electrical characteristic is a conductor or a semiconductor depending on the angle and structure of the graphite surface. CNTs can be classified into single-walled carbon nanotubes (SWCNTs), double-walled carbon nanotubes (DWCNTs), and thin multi-walled carbon nanotubes (CNTs) depending on the number of graphite walls. nanotubes, multi-walled carbon nanotubes (MWCNTs), and roped carbon nanotubes.

In particular, CNTs are excellent in mechanical strength and elasticity, chemically stable, environmentally friendly, electrically conductive and semiconducting, and have diameters ranging from 1 nm to several tens nm and lengths ranging from several microns to tens of microns It is larger than any existing material with an aspect ratio of about 1,000. In addition, the surface area is very high, and it is getting attention as a high-tech new material that will lead the 21st century in the fields of next-generation information and electronic materials, high-efficiency energy materials, high-functional composite materials and environment-

Korean Patent Publication No. 10-1329974 discloses an electromagnetic wave shielding composition containing carbon nanotubes and carbon compounds that have been surface-modified under resin, subcritical or supercritical conditions, and the electromagnetic wave shielding composition is applied to a substrate for a display element substrate There has been no research to be done.

The present invention relates to a foamed substrate; And a carbon nanotube layer formed on at least one side of the foamed substrate, wherein the carbon nanotube layer includes a plurality of carbon nanotubes having a network structure.

However, the technical problem to be solved by the present invention is not limited to the above-mentioned problems, and other matters not mentioned can be clearly understood by those skilled in the art from the following description.

The present invention relates to a foamed substrate; And a carbon nanotube layer formed on at least one side of the foam substrate, wherein the carbon nanotube layer includes a plurality of carbon nanotubes having a network structure.

The foam substrate may be non-woven.

The expansion ratio of the foamed substrate may be 10 to 40 times.

The foam substrate may be formed from a composition comprising a first thermoplastic resin, a foaming agent, and a foam stabilizer.

Wherein the first thermoplastic resin is at least one selected from the group consisting of a polyethylene resin, a polyacetal resin, a polyacrylate resin, a polycarbonate resin, a polystyrene resin, a polyester resin, a polyvinyl resin, a polyphenylene ether resin, , Polyacrylonitrile-butadiene-styrene copolymer resins, polyarylate resins, polyamide resins, polyamideimide resins, polyarylsulfone resins, polyetherimide resins, polyether sulfone resins, polyphenylene Based resins, polyphenylene resins, polyimide resins, polyether ketone resins, polybenzoxazole resins, polyoxadiazole resins, polybenzothiazole resins, polybenzidine resins, polypyridine resins, poly Triazole-based resins, polypyrrolidine-based resins, polydibenzofuran-based resins, polysulfone-based resins, polyurea-based resins, and poly From the group consisting of SPA jengye resin may include one or more selected.

The foaming agent may be at least one selected from the group consisting of azodicarboxylamide, azobistetrazole diaminoguanidine, azobistetrazole guanidine, 5-phenyltetrazole, bistetrazole guanidine, bistetrazolepiperazine, Nitrosopentamethylenetetramine, and hydrazodicarboxamide. The term " a "

The molecular weight of the foam stabilizer may be from 100 g / mol to 1,000 g / mol.

The foam stabilizer may be included in an amount of 0.1 wt% to 5.0 wt% based on the total weight of the composition.

The foam stabilizer may include at least one member selected from the group consisting of glycerol monostearate, glycerol distearate, glycerol tristearate, zinc stearate, calcium stearate, and magnesium stearate.

The carbon nanotube layer may be in the form of a blown film.

The carbon nanotube layer may have a thickness of 10 mu m to 100 mu m.

The plurality of carbon nanotubes may be formed by treating a composition comprising carbon nanotubes and a dispersion medium under subcritical or supercritical conditions.

The dispersion medium may contain at least one selected from the group consisting of water, aliphatic alcohols and carbon dioxide.

The carbon nanotube layer may further include a carbon compound and at least one second thermoplastic resin selected from the group consisting of carbon black, graphite, carbon fiber, graphene and fullerene.

The surface resistance of the support may be from 5 log (? /?) To 9 log (? /?).

According to an embodiment of the present invention, there is provided a method of manufacturing a carbon nanotube, comprising: a) preparing a plurality of carbon nanotubes having a network structure by treating a composition comprising carbon nanotubes and a dispersion medium under subcritical or supercritical conditions; b) preparing a carbon nanotube layer containing the plurality of carbon nanotubes; And c) forming the carbon nanotube layer on at least one surface of the foaming substrate.

In the step b), the carbon nanotube layer may be produced through blow molding.

A support for a display element substrate according to the present invention comprises: a foam substrate; And a carbon nanotube layer formed on at least one surface of the foam substrate, wherein the carbon nanotube layer includes a plurality of carbon nanotubes having a network structure, wherein the carbon nanotube layer includes a plurality of carbon nanotubes, migration can be prevented so as not to cause whitening, and low surface resistance can be maintained, thus providing excellent antistatic properties.

1 shows a structure of a support for a display element substrate according to an embodiment of the present invention.
FIG. 2 is a graph showing the results of (a) observation of the carbon nanotube layer compositions prepared in Example 1 and (b) Comparative Example 1 using a scanning electron microscope (SEM) (left) and a transmission electron microscope It is a photograph.
FIG. 3 is a photograph of the surface of the support for a display element substrate manufactured in (a) Example 1 and (b) Comparative Example 1, respectively, visually observing whether whitening occurred.

The present inventors have found that after a support for a display element substrate is manufactured by applying a carbon nanotube layer including a plurality of carbon nanotubes constituting a network structure, it is confirmed that such a support maintains a low surface resistance without causing whitening And completed the present invention.

Hereinafter, the present invention will be described in detail.

The present invention relates to a foamed substrate; And a carbon nanotube layer formed on at least one side of the foam substrate, wherein the carbon nanotube layer includes a plurality of carbon nanotubes having a network structure.

First, the support for a display element substrate according to the present invention includes a foam substrate, and the foam substrate has a foam cell in the form of a fine bubble, so that the foam substrate has excellent strength and shape stability.

Unlike the carbon nanotube layer, the foaming substrate is preferably non-crosslinked but not limited to a network structure. Such a nonwoven fabric foamed substrate is characterized in that the foamed substrate does not contain a crosslinking agent and a crosslinking assistant, and is characterized by excellent moldability and processability.

When the foaming ratio is less than 10 times, the impact absorbing ability is lowered and the foaming base material does not have a sufficient role. On the other hand, when the foaming ratio is more than 40 times, There is a problem that it becomes difficult to support the upper weight.

The thickness of the foamed substrate may be 0.1 mm to 10 mm.

The "foaming ratio" corresponding to the term used in the present specification is calculated by measuring the density of the foam substrate from the weight of the foam substrate and the volume obtained by the submerging method, and then calculating the ratio of the density to the first thermoplastic resin density before foaming.

Specifically, the foam substrate may be formed from a composition comprising a first thermoplastic resin, a foaming agent, and a foam stabilizer, and may be foamed by a foaming process known in the art. At this time, it is preferable that the foam substrate is non-crosslinked, and it is preferable that the foam substrate does not contain a crosslinking agent and a crosslinking assistant in the composition.

The first thermoplastic resin is used as a base resin for forming the foamed substrate and may be a polyethylene resin, a polyacetal resin, a polyacrylate resin, a polycarbonate resin, a polystyrene resin, a polyester resin, a poly Butadiene-styrene copolymer resins, polyarylate resins, polyamide resins, polyamideimide resins, polyarylsulfone resins, polyphenylene ether resins, and polyphenylene ether resins. Based resins, polyimide-based resins, polyimide-based resins, polyimide-based resins, polyether sulfone-based resins, polyether sulfone-based resins, Resin, polybenzimidazole resin, polypyridine resin, polytriazole resin, polypyrrolidine resin, poly Based resin, a dibenzofuran-based resin, a polysulfone-based resin, a polyurea-based resin, and a polyphosphazene-based resin, more preferably a polyethylene resin, but is not limited thereto .

The weight average molecular weight of the first thermoplastic resin may be from 50,000 g / mol to 1,500,000 g / mol. If the weight average molecular weight of the first thermoplastic resin is less than 50,000 g / mol, the melt strength and the mechanical strength of the first thermoplastic resin may deteriorate. If the weight average molecular weight of the first thermoplastic resin exceeds 1,500,000 g / mol, There is a problem that the quality of the final product is deteriorated due to a melt fracture phenomenon in which the surface is not processed or the surface roughness is increased.

The foaming agent is used for improving physical properties such as strength and form stability of the foamed substrate by foaming the first thermoplastic resin. Examples of the foaming agent include azodicarboxylamide, azobistetrazole diaminoguanidine, azobistetrazole guanidine, 5 It is preferable to include at least one selected from the group consisting of phenyltetrazole, bistetrazole guanidine, bistetrazole piperazine, bistetrazolidiammonium, N, N-dinitrosopentamethylenetetramine and hydrazodicarboxamide But is not limited thereto.

The foam stabilizer is essentially used in the present invention to stabilize the cell contained in the foam substrate, but the foam stabilizer may migrate to the outside of the foam substrate due to the difference in molecular weight between the foam stabilizer and the first thermoplastic resin There is a problem to be done. In the present invention, a plurality of carbon nanotubes have a network structure to solve this problem.

The molecular weight of the foam stabilizer may be from 100 g / mol to 1,000 g / mol.

In addition, the foam stabilizer may be included in an amount of 0.1% by weight to 5.0% by weight based on the total weight of the composition. When the content of the foam stabilizer is less than 0.1% by weight, a foam substrate may not be formed normally due to a decrease in cell stability. When the content of the foam stabilizer exceeds 5.0% by weight, The quality of the final product is deteriorated.

Specifically, the foam stabilizer preferably contains at least one member selected from the group consisting of glycerol monostearate, glycerol distearate, glycerol tristearate, zinc stearate, calcium stearate and magnesium stearate, and glycerol monostearate More preferably, it includes but is not limited to a rate.

For example, in the case of using a polyethylene resin having a weight average molecular weight of 800,000 g / mol as a thermoplastic resin and 2.0% by weight of glycerol monostearate having a molecular weight of 358.56 g / mol as a foam stabilizer, , Migration of glycerol monostearate may occur due to the difference in molecular weight between them. At this time, in the present invention, a plurality of carbon nanotubes in the carbon nanotube layer have a network structure to solve this problem.

In the conventional support for a display element substrate, a general polyethylene film is formed on both surfaces of both surfaces of a foam substrate, and then a conductive polymer is coated thereon. At this time, since two layers are formed on both surfaces of the foam substrate, There is a problem that the cost increases.

The support for a display device substrate according to the present invention includes a carbon nanotube layer formed on at least one surface of the foam substrate, and the carbon nanotube layer includes a plurality of carbon nanotubes having a network structure.

As used herein, the term " network structure " refers to a structure having one or more junction points between different carbon nanotubes, wherein a plurality of carbon nanotubes have a network structure, It is possible to block the migration so that the foam stabilizer having a small molecular weight contained therein can not escape.

The carbon nanotube layer may be in the form of a blown film to be formed on at least one surface of the foam substrate. The carbon nanotube layer may include a plurality of carbon nanotubes have. Due to the excellent dispersibility of the carbon nanotubes in the carbon nanotube layer, the thin film can be blown into a blown film.

As described above, the carbon nanotube layer in the form of a blown film preferably has a thickness of 10 mu m to 100 mu m, but is not limited thereto. In this case, since the carbon nanotube layer is maintained in the above-described range, it is possible to prevent the problem that the blown film is not formed or the conductivity is not realized due to excessive shear during blow molding, It has the advantage of being able to maintain a thin thickness to be competitive. This thickness can be controlled by the speed of the winder during blow molding.

The carbon nanotube layer may include a plurality of carbon nanotubes formed by treating a composition including carbon nanotubes and a dispersion medium under subcritical or supercritical conditions so that a plurality of carbon nanotubes have a network structure.

The dispersion medium may contain at least one selected from the group consisting of water, aliphatic alcohols and carbon dioxide.

At this time, the subcritical or supercritical condition is maintained at a pressure of 50 atm to 400 atm, the temperature during the subcritical treatment is 50 to 380 ° C, and the temperature during the supercritical treatment is maintained at 350 to 600 ° C But is not limited thereto. As a result, a plurality of carbon nanotubes can attain a network structure by increasing dispersibility.

Alternatively, the oxidizing agent may be further treated with an oxidizing agent under the subcritical or supercritical conditions, and the oxidizing agent may be oxygen, air, ozone, nitric acid, hydrogen peroxide, and the like.

The carbon nanotube may be at least one selected from the group consisting of single-walled, double-walled, thin multi-walled, multi-walled and multi- .

The carbon nanotube layer may further include a carbon compound and at least one second thermoplastic resin selected from the group consisting of carbon black, graphite, carbon fiber, graphene and fullerene.

The carbon compound may be added after the plurality of carbon nanotubes are prepared under subcritical or supercritical conditions, or may be added together when preparing a plurality of carbon nanotubes under subcritical or supercritical conditions. After the addition of the carbon compound, the carbon nanotube layer can be produced through blow molding or the like.

The plurality of carbon nanotubes and the carbon compound may maintain a weight ratio of 1: 0.00001 to 1: 100, preferably 1: 0.1 to 1:10, thereby enhancing mutual miscibility and dispersibility.

The second thermoplastic resin may also be added after the plurality of carbon nanotubes are prepared under subcritical or supercritical conditions and may be added together in the production of a plurality of carbon nanotubes under subcritical or supercritical conditions have. After the addition of the second thermoplastic resin, the carbon nanotube layer can be produced through blow molding or the like. The specific kind of the second thermoplastic resin is the same as the first thermoplastic resin mentioned above.

The plurality of carbon nanotubes and the second thermoplastic resin can maintain mutual miscibility and dispersibility by maintaining a weight ratio of 1: 0.00001 to 1: 100, preferably 1: 0.1 to 1: 100.

In addition to the carbon compound and the second thermoplastic resin, known additives such as a lubricant may be further added.

The surface resistivity of the support may be 5 log (Ω / □) to 9 log (Ω / □), which is an ESD (Electro-Static Dissipation) region, and 6 log (Ω / □) , But is not limited thereto. In this case, when the surface resistance of the support is less than the above range, there is a problem that the component parts of the display element are damaged due to energization, and when the surface resistance of the support exceeds the above range, the antistatic property against the electric shock is weakened .

The support for a display element substrate may be a liquid crystal display device (LCD), a plasma display panel (PDP), a field emission display (FED), an electroluminescent display , ELD, cathode ray tubes (CRT), and the like, and may be preferably used for horizontally stacking the liquid crystal display element substrates.

Also, the present invention provides a method of manufacturing a carbon nanotube, comprising: a) preparing a plurality of carbon nanotubes having a network structure by treating a composition comprising carbon nanotubes and a dispersion medium under subcritical or supercritical conditions; b) preparing a carbon nanotube layer containing the plurality of carbon nanotubes; And c) forming the carbon nanotube layer on at least one surface of the foaming substrate.

Specifically, the support substrate for display irradiation substrates according to the present invention comprises a) preparing a plurality of carbon nanotubes having a network structure by treating a composition comprising carbon nanotubes and a dispersion medium under subcritical or supercritical conditions .

The treatment method under specific subcritical or supercritical conditions is as described above.

Next, the support for display irradiation substrates according to the present invention includes a step of producing a carbon nanotube layer containing the plurality of carbon nanotubes.

The carbon nanotube layer may be manufactured by molding a plurality of carbon nanotubes themselves, but may also be manufactured by further adding a carbon compound and a second thermoplastic resin to a plurality of carbon nanotubes, followed by molding. Specifically, the carbon nanotube layer can be produced through blow molding. In blow molding, the speed of the winder is controlled to adjust the thickness of the carbon nanotube layer to control the thickness of the carbon nanotube layer A nanotube layer can be produced.

Thereafter, the support substrate for display irradiation substrates according to the present invention comprises the step of: (c) forming the carbon nanotube layer on at least one surface of the foamed substrate. Specifically, the formation of the carbon nanotube layer can be performed through thermal lamination.

Accordingly, the support for a display element substrate according to the present invention prevents migration of a foam stabilizer having a small molecular weight contained in a foamed base material to prevent whitening and low surface resistance, Is excellent.

Hereinafter, preferred embodiments of the present invention will be described in order to facilitate understanding of the present invention. However, the following examples are provided only for the purpose of easier understanding of the present invention, and the present invention is not limited by the following examples.

[ Example ]

Example  One

20 g of multi-wall carbon nanotubes (Hanwha Chemical Co., Ltd. MWCNT) were mixed with 980 g of distilled water and a circulation pump, and the mixture was prepared in a pretreatment tank. The mixture was introduced into the preheater at a flow rate of 15 g / min through a high pressure injection pump. The solution was introduced into a preheated preheated vessel at 200-240 ° C. via a heat exchanger. The preheated mixture is injected into the reactor for increasing the dispersibility of the subcritical state at 300 DEG C and 230 to 250 atm, and is subjected to subcritical treatment in the reactor to increase the dispersibility, and the dispersed product is further transferred to the heat exchanger After first cooling to 200 ° C and cooling to about 25 ° C through a cooling device, 19.9g of a plurality of carbon nanotubes having a network structure were continuously produced.

10% by weight of a plurality of carbon nanotubes, 1% by weight of zinc stearate as a lubricant, and 89% by weight of polyethylene were kneaded in a 75 L kneader at 150 캜 and 30 rpm for 15 minutes and put in a hopper of a blown film molding machine , Passed through an extruder at 190 ° C at 200 rpm, passed through a winder at 30 rpm to prepare a carbon nanotube layer in the form of a blown film having a thickness of 20 μm.

FIG. 1 (a) is a photograph of the carbon nanotube layer composition of Example 1 observed with a scanning electron microscope (SEM) (left) and a transmission electron microscope (right) It can be confirmed that a plurality of carbon nanotubes are combined with each other to form a network structure in an increased state.

A carbon nanotube layer was laminated on both sides of a nonwoven fabric type polyethylene foam substrate (containing 2 wt% of glycerol monostearate, a foaming ratio of 30 and a thickness of 1 mm), and then laminated by heat through a roller at 120 캜, Was prepared.

Example  2

A support for a display element substrate was finally prepared in the same manner as in Example 1, except that a carbon nanotube layer of a blown film type having a thickness of 10 탆 was passed through a winder at 35 rpm.

Example  3

A support for a display element substrate was finally prepared in the same manner as in Example 1, except that a carbon nanotube layer of a blown film type having a thickness of 40 um was passed through a winder at 20 rpm.

Example  4

The same procedure as in Example 1 was carried out except that the temperature of the heat exchanger during the preheating of the multi-wall carbon nanotubes was 350 to 370 ° C and that the treatment was carried out at a supercritical water temperature, To prepare a support for a display element substrate.

Example  5

A support for a display element substrate was finally prepared in the same manner as in Example 1, except that 3 wt% of a plurality of carbon nanotubes and 7 wt% of carbon black were used instead of 10 wt% of the plurality of carbon nanotubes.

Comparative Example  One

A support for a display element substrate was finally prepared in the same manner as in Example 1, except that the multi-walled carbon nanotube (Hanwha Chemical Co., Ltd., MWCNT) was not treated separately under subcritical or supercritical conditions.

FIG. 1 (b) is a photograph of the carbon nanotube layer composition of Comparative Example 1 observed with a scanning electron microscope (SEM) (left) and a transmission electron microscope (right) I could confirm that there existed the network structure without forming a cluster.

Comparative Example  2

A support for a display element substrate was finally prepared in the same manner as in Example 2, except that the multi-walled carbon nanotube (Hanwha Chemical Co., Ltd. MWCNT) was not separately treated under subcritical or supercritical conditions.

Experimental Example

(1) Evaluation of bleaching phenomenon

The support for a display element substrate prepared in Examples 1 to 5 and Comparative Examples 1 and 2 was allowed to stand for 240 hours in a constant temperature and humidity chamber at a temperature of 70 ° C and a humidity of 90% , And the results are shown in Table 1 below.

FIG. 3 is a photograph of the surface of the support for a display element substrate manufactured in (a) Example 1 and (b) Comparative Example 1, respectively, visually observing whether whitening occurred.

As shown in FIG. 3, the support for a display device substrate prepared in Example 1 was different from the support for a display device substrate prepared in Comparative Example 1, in which a plurality of carbon nanotubes in a carbon nanotube layer , It was confirmed that the migration of the foam stabilizer having a small molecular weight contained in the foamed substrate was prevented and the whitening phenomenon did not occur.

(2) Surface resistance measurement

The carbon nanotube layer and the support for a display element substrate prepared in Examples 1 to 5 and Comparative Examples 1 and 2 were each coated with a surface coating agent according to JIG K 7194 / ASTM D991 using Mitsubishi's Loresta GP (MCP-T600) The resistance was measured and is shown in Table 1 below.

division Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Carbon nanotube
Treatment condition Subcritical Subcritical Subcritical Supercritical Subcritical Untreated Untreated Carbon nanotube layer composition
(weight%)
Carbon nanotube 10 10 10 10 3 10 10 Carbon black 0 0 0 0 7 0 0 Lubricant One One One One One One One Polyethylene 89 89 89 89 89 89 89 Carbon nanotube layer thickness
(탆) 20 10 40 20 20 20 10 Winder Speed
(rpm) 30 35 22 30 30 30 35 Whitening Not occurring Not occurring Not occurring Not occurring Not occurring Occur Occur Surface resistance
(log (? /?)) Carbon nanotube layer 7 8.5 5.1 7.3 7.8 9.2 range
Excess A support for a display element substrate 7.1 8.3 5.3 7.6 8.2 11.5 range
Excess

As shown in Table 1, it was confirmed that the support for a display element substrate manufactured in Examples 1 to 5 did not cause whitening and was able to maintain a low surface resistance.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

Claims (17)

Foamed substrates; And
And a carbon nanotube layer formed on at least one surface of the foamed substrate,
Wherein the foam substrate is formed from a composition comprising a first thermoplastic resin, a foaming agent and a foam stabilizer,
Wherein the carbon nanotube layer includes a plurality of carbon nanotubes having a network structure
Support for display element substrate.
The method according to claim 1,
The foamed substrate may be a non-
Support for display element substrate.
The method according to claim 1,
The expansion ratio of the foamed substrate is 10 to 40 times
Support for display element substrate.
delete The method according to claim 1,
Wherein the first thermoplastic resin is at least one selected from the group consisting of a polyethylene resin, a polyacetal resin, a polyacrylate resin, a polycarbonate resin, a polystyrene resin, a polyester resin, a polyvinyl resin, a polyphenylene ether resin, , Polyacrylonitrile-butadiene-styrene copolymer resins, polyarylate resins, polyamide resins, polyamideimide resins, polyarylsulfone resins, polyetherimide resins, polyether sulfone resins, polyphenylene Based resins, polyphenylene resins, polyimide resins, polyether ketone resins, polybenzoxazole resins, polyoxadiazole resins, polybenzothiazole resins, polybenzidine resins, polypyridine resins, poly Triazole-based resins, polypyrrolidine-based resins, polydibenzofuran-based resins, polysulfone-based resins, polyurea-based resins, and poly From the group consisting of SPA jengye resin comprising one or more selected
Support for display element substrate.
The method according to claim 1,
The foaming agent may be at least one selected from the group consisting of azodicarboxylamide, azobistetrazole diaminoguanidine, azobistetrazole guanidine, 5-phenyltetrazole, bistetrazole guanidine, bistetrazolepiperazine, Nitroso pentamethylenetetramine, and hydrazodicarboxamide. ≪ RTI ID = 0.0 >
Support for display element substrate.
The method according to claim 1,
The molecular weight of the foam stabilizer is preferably from 100 g / mol to 1,000 g / mol
Support for display element substrate.
The method according to claim 1,
Wherein the foam stabilizer is contained in an amount of 0.1 wt% to 5.0 wt%
Support for display element substrate.
The method according to claim 1,
Wherein said foam stabilizer comprises at least one member selected from the group consisting of glycerol monostearate, glycerol distearate, glycerol tristearate, zinc stearate, calcium stearate and magnesium stearate
Support for display element substrate.
The method according to claim 1,
The carbon nanotube layer may be in the form of a blown film
Support for display element substrate.
The method according to claim 1,
Wherein the carbon nanotube layer has a thickness of 10 mu m to 100 mu m
Support for display element substrate.
The method according to claim 1,
The plurality of carbon nanotubes may be formed by treating a composition comprising carbon nanotubes and a dispersion medium under subcritical or supercritical conditions
Support for display element substrate.
13. The method of claim 12,
Wherein the dispersion medium comprises at least one selected from the group consisting of water, aliphatic alcohols and carbon dioxide
Support for display element substrate.
The method according to claim 1,
Wherein the carbon nanotube layer further comprises a carbon compound and at least one second thermoplastic resin selected from the group consisting of carbon black, graphite, carbon fiber, graphene and fullerene
Support for display element substrate.
The method according to claim 1,
The surface resistance of the support is 5 log (? /?) To 9 log (? /?)
Support for display element substrate.
a) preparing a plurality of carbon nanotubes having a network structure by treating a composition comprising carbon nanotubes and a dispersion medium under subcritical or supercritical conditions;
b) preparing a carbon nanotube layer containing the plurality of carbon nanotubes; And
c) forming the carbon nanotube layer on at least one surface of the foaming substrate,
The foamed substrate is formed from a composition comprising a first thermoplastic resin, a foaming agent and a foam stabilizer
A method of manufacturing a support for a display element substrate.
17. The method of claim 16,
In the step b), the carbon nanotube layer is produced by blow molding
A method of manufacturing a support for a display element substrate.

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