JP4416903B2 - Processed material manufacturing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method of manufacturing a processing member that is provided inside an electroluminescence (hereinafter referred to as “EL”) element and removes a predetermined gas component that adversely affects the EL element.
[0002]
[Prior art]
Conventionally, EL devices (electroluminescent devices) have been used as light emitters in displays, light emitting devices, and the like of various devices such as mobile devices. However, the EL element has a problem that light emission performance such as light emission luminance and light emission uniformity is significantly deteriorated as compared with the initial state under a high temperature condition or after a certain period of time. Such deterioration of the light emission performance is caused by moisture adsorbed on the surface of the component or component material, water vapor entering from the outside, oxygen, or organic vapor inside the EL element. It is known that a dark spot) occurs.
[0003]
In addition, the hard disk of a computer has a problem that the disk drive head is damaged by the internal fine particles and the surface of the disk is contaminated by organic vapor.
[0004]
Therefore, as a means for solving the above problems, an adsorbing member in which an adsorbent for treating the organic vapor is included in a porous container is known. And this adsorption | suction member is incorporated and used in apparatuses, such as the said hard disk. For example, in Japanese Patent Application Laid-Open No. 11-57377, as shown in FIG. 4, as an adsorbing member, a container formed by sealing the peripheral portions of a pair of sheet-like porous films made of polytetrafluoroethylene 51 is used. An adsorbent-containing porous container including the adsorbent 52 has been proposed.
[0005]
[Problems to be solved by the invention]
On the other hand, in order to cope with the thinning of a mobile device or the like to which the EL element is attached, the EL element and the adsorption member incorporated in the EL element also need to be thinned. However, since the conventional adsorption member has a container shape, it is difficult to reduce the thickness. As a result, it is difficult to reduce the thickness of the EL element, and it is difficult to cope with the reduction in the thickness of the device.
[0006]
The present invention has been made in view of such circumstances, and an object thereof is to provide a method for producing a treatment member which is an adsorption member that can be easily made thinner.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention interposes a removing agent for removing a predetermined gas component between non- porous green sheets made of polytetrafluoroethylene in a facing state, and in that state The manufacturing method of the processing member that makes the unfired sheets integrated and porous by stretching is a first gist. In the manufacturing method of the first processing member, the unfired sheets are integrated and porous. The manufacturing method of the processing member to be heat-treated after making it into a second is the second gist.
[0008]
That is, in the method for producing the first processing member of the present invention, a removing agent for removing a predetermined gas component is interposed between non- porous sheets made of polytetrafluoroethylene in a facing state, Stretch in the state. By this stretching, each green sheet becomes porous and fibrillated (fibrous). By this fibrillation, the fibers of each unsintered sheet are entangled, and the two unsintered sheets in a facing state are integrated with the removal agent interposed therebetween. As a result, it is possible to produce a processing member having a remover inside. Moreover, since the manufacturing method of the processing member of this invention is extended | stretched as mentioned above, the thickness of a processing member can be adjusted with the setting of a draw ratio, and can be thinned easily.
[0009]
In addition, the second processing member manufacturing method of the present invention is the same as the first processing member manufacturing method described above, because the unfired sheets are integrated with each other and made porous and then heat treated, so that the residual stress during stretching is Is removed, and the dimensional stability of the processing member is improved.
[0010]
Next, the present invention will be described in detail.
[0011]
In the process for producing a treated member of the present invention, a removing agent for removing a predetermined gas component is interposed between unsintered sheets made of polytetrafluoroethylene in a facing state, and stretched in that state.
[0012]
The removing agent is not particularly limited, and, for example, compounds widely used as an adsorbent, a hygroscopic agent (drying agent), an oxygen scavenger (oxygen absorbent), and the like are used. Among these, a compound that removes at least one selected from the group consisting of water vapor, oxygen, and organic vapor is preferable. Examples of the hygroscopic agent include those that physically adsorb moisture, those that chemically react with moisture (those that react irreversibly with water to produce a compound that does not contain water, and reversibly with water). Any of those that combine to form a hydrate can be used. Examples of such a moisture absorbent include silica gel, molecular sieve (molecular sieve: zeolite, etc.), activated alumina, alkali metal oxide, alkaline earth metal oxide, diphosphorus pentoxide, calcium hydride, lithium aluminum hydride, Examples include sulfates, carbonates, metal halides, perchlorates, active metals, and organic substances. Examples of the oxygen scavenger include silica gel, activated alumina, molecular sieve, magnesium oxide, iron oxide and the like. Examples of the organic gas adsorbent include activated carbon, silica gel, and molecular sieve. Furthermore, the removing agent may be used by mixing a plurality of the compounds exemplified above.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in detail with reference to the drawings.
[0014]
FIG. 1 shows an embodiment of a method for producing a treatment member of the present invention. In this embodiment, the process member is manufactured by first producing two non- porous porous sheets 1 made of polytetrafluoroethylene (hereinafter referred to as “PTFE”), and then forming the two non- porous sheets. The fired sheet 1 is faced, and a removing agent 2 for removing a predetermined gas component is interposed between the faced unfired sheets 1 by spraying or the like, and then stretched in that state, thereby unfired. The sheets 1 are integrated with each other and the unfired sheet 1 is made porous.
[0015]
Therefore, first described manufacturing unfired sheet 1 not made porous made of PTFE. That is, a liquid lubricant is added to PTFE fine powder and mixed, and the mixture is extruded, rolled, or a combination of both to obtain a non- porous sheet 1 having a thickness of 0.05 to 2 mm.
[0016]
More specifically, the PTFE fine powder is not particularly limited. Examples of commercially available PTFE fine powder include polyflon-F-104 (manufactured by Daikin Industries), Aflon CD141 and Aflon CD123 (manufactured by Asahi Glass), and Teflon. 6-J (Mitsui / Dupont Fluoro Chemical Co., Ltd.).
[0017]
The liquid lubricant is not particularly limited as long as it can wet the surface of the PTFE fine powder and can be removed by evaporation or extraction after obtaining the unfired sheet 1, for example, liquid paraffin, Examples thereof include hydrocarbon oils such as naphtha, white oil, toluene, and xylene, alcohols, ketones, esters, and mixtures of two or more thereof.
[0018]
The amount of the liquid lubricant added to the PTFE fine powder is appropriately adjusted depending on the type of PTFE fine powder and liquid lubricant and the molding method (the extrusion, rolling, etc.) used to obtain the unfired sheet 1. 2 to 100 parts by weight with respect to 100 parts by weight of PTFE fine powder.
[0019]
As a specific example of the forming method for obtaining the non- porous green sheet 1 described above, a mixture of PTFE fine powder and liquid lubricant is extruded into a rod shape and then rolled into a rolled sheet. Examples thereof include a method, a method of extruding into a plate shape to form a sheet, or a method of extruding into a plate shape and then rolling into a sheet with a roll.
[0020]
Then, the way the liquid lubricant from the green sheet 1 not made porous was obtained, the heating method, extraction method, or a combination of both of them, is removed. After that, two unfired sheets 1 from which the liquid lubricant has been removed are faced, and the remover 2 is interposed between the facing unfired sheets 1 and stretched in that state. By this stretching, each green sheet 1 becomes porous and fibrillated (fibrous). By this fibrillation, the fibers of each unfired sheet 1 are entangled, and the two unfired sheets 1 facing each other are integrated with the removal agent 2 interposed therebetween. In this way, a sheet-like processing member A having the removing agent 2 interposed therein is produced as shown in FIG.
[0021]
More specifically, the stretching may be performed in one direction or in two or more directions. Moreover, although a draw ratio is 2-50 times normally, it is preferable that it is 10-30 times at the point that fibrillation is accelerated | stimulated. And the thickness of the said sheet-like processing member A can be adjusted with the setting of the draw ratio. Furthermore, it is preferable that the temperature at the time of extending | stretching is 100 degreeC or more and less than 327 degreeC (melting | fusing point of PTFE).
[0022]
The sheet-like processing member A produced in this way is adjusted to a predetermined size and shape, and can be incorporated in, for example, an EL element as shown in FIG. That is, in this EL element, a laminated body (EL) 15 in which the organic light emitting layer 12 is sandwiched between the anode 13 and the cathode 14 is formed on the upper surface of the recess of the dish-shaped surface substrate 11 so as to cover the laminated body 15. A dish-shaped rear substrate 16 is provided on the surface substrate 11 with the recesses facing each other, and the peripheral portion of the rear substrate 16 and the peripheral portion of the front substrate 11 are fixed by a sealing material 17. It is. The processing member A is coated with an adhesive on one side (the upper surface in FIG. 3) to form an adhesive layer 3, and is fixed to the ceiling of the back substrate 16 via the adhesive layer 3. The In addition, since the EL element itself is thin when incorporated in the EL element as described above, the thickness of the processing member A is not particularly limited, but is adjusted to 3 mm or less. Is preferred.
[0023]
And since the said processing member A has the porous surface, it is excellent in gas permeability, and removes gaseous components, such as organic vapor | steam which causes the dark spot which penetrate | invaded the inside of EL element with the removal agent 2. It can be removed efficiently.
[0024]
Thus, according to the said embodiment, the manufacturing method of the sheet-like process member A is a simple method of extending | stretching through the removal agent 2 between the non-baked sheet | seats 1 which faced and were not made porous. Therefore, the manufacturing cost of the processing member A can be suppressed.
[0025]
In addition, the thickness of the processing member A can be adjusted by setting the draw ratio and can be easily reduced in thickness, so that the EL element can be reduced in thickness. As a result, it is possible to cope with a reduction in thickness of a mobile device or the like to which an EL element is attached. Furthermore, since the processing member A has a sheet shape, it can be easily processed into a predetermined shape by punching or the like, and its size and shape can be easily adjusted. As a result, since the EL element can be reduced in size, it is possible to cope with downsizing of a mobile device or the like to which the EL element is attached.
[0026]
Moreover, since the processing member A is PTFE, it is excellent in heat resistance and can be used even in a heating environment.
[0027]
In the process member manufacturing method according to another embodiment, the process member A obtained in the above embodiment is heat-treated. The other parts are the same as in the above embodiment.
[0028]
More specifically, the heat treatment is for removing residual stress at the time of stretching, and is preferably performed by regulating the dimension in the stretching direction. Moreover, the temperature of heat processing is not specifically limited, However, It is preferable that it is the temperature more than the temperature at the time of extending | stretching. In addition, when the temperature of the heat treatment is 327 ° C. (melting point of PTFE) or higher, the porous unfired sheet is fired to obtain the processing member A having high mechanical strength.
[0029]
Also according to such an embodiment, the same operation and effect as the above-described embodiment are obtained. Furthermore, when heat treatment is performed as in this embodiment, the dimensional stability of the processing member A (particularly, dimensional stability during heating) is improved.
[0030]
Next, examples will be described.
[0031]
[Example 1]
First, 30 parts by weight of white kerosene is dispersed and mixed with 100 parts by weight of Aflon CD141 (PTFE fine powder manufactured by Asahi Glass Co., Ltd.). Next, the mixture is extruded into a rod shape, and then rolled into a sheet shape. After that, the white kerosene was allowed to stand at 100 ° C. for 48 hours in a dryer and the white kerosene was volatilized and dried to obtain a non- porous porous sheet made of PTFE having a thickness of 0.5 mm.
[0032]
Subsequently, silica gel powder (average particle size 20 μm) was dispersed on one side of the unfired sheet at a rate of 20 g per 1 m ² , and the unfired sheet similar to the above was layered on the dispersed surface, and the magnification was 200 ° C. in the vertical direction. The film was stretched 20 times, and stretched 20 times in the transverse direction at 200 ° C. By these stretching, the unsintered sheets were each made porous (pore diameter 1 μm, porosity 90%) and integrated with the silica gel powder interposed therebetween. In this way, a long processing member (thickness: about 25 μm) was obtained.
[0033]
[Example 2]
The length and the horizontal dimension of the processing member obtained in Example 1 were regulated and heat-treated at a temperature of 350 ° C. for 10 seconds. Thus, the process member by which the porous unbaking sheet | seat which consists of PTFE was baked was obtained.
[0034]
[Example 3]
A nonwoven fabric made of polypropylene was superposed on one side of the treated member obtained in Example 1, and laminated by heating at a temperature of 160 ° C. for 10 seconds. In this way, a treatment member with a reinforcing material (thickness: about 0.5 mm) was obtained.
[0035]
In each of the above embodiments, the processing member A may be laminated with a reinforcing material as in the third embodiment. As the reinforcing material, for example, a porous material such as a nonwoven fabric, a woven fabric, or a mesh can be used. When the processing material A is laminated, an adhesive is used or laminated (a material for the porous material). Is a thermoplastic material). And as a material of the above-mentioned porous material, polyolefin (for example, polyethylene, polypropylene, etc.), nylon, polyester, aramid (aromatic polyaramid), a composite of these (for example, a nonwoven fabric made of core-sheath structure fibers, Two-layer nonwoven fabric of low melting point material and high melting point material, etc.), fluorine-based porous membrane [for example, PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer), FEP (tetrafluoroethylene / hexafluoropropylene copolymer) ), PTFE porous membrane, etc.]. In particular, a non-woven fabric composed of synthetic fibers having a core-sheath structure and a core component having a melting point relatively higher than that of the sheath component, and a two-layer non-woven fabric of a low-melting material and a high-melting material are preferable. This is because they are less likely to be clogged during laminating and more difficult to shrink.
[0036]
Moreover, in each said embodiment, although the two unfired sheets 1 were faced, if it can interpose between the unfired sheets 1 which face the removal agent 2, it will not be limited to this Alternatively, two or more facing portions may be provided by using three or more unfired sheets 1, and the removing agent 2 may be interposed in each facing portion, or may be interposed in a part of the facing portions. . Further, the facing portion may be provided by bending one green sheet 1.
[0037]
In the above embodiments, the adhesive used when fixing the processing member A inside the EL element is not particularly limited, and is a pressure-sensitive adhesive (adhesive), a hot melt adhesive, an ultraviolet ray. An adhesive that cures by heat, humidity, or the like, a two-component mixed adhesive, a room-temperature curable adhesive, or the like is used. Further, in order to reinforce the adhesive layer 3 itself, the adhesive layer 3 may be provided with a support material such as a nonwoven fabric, paper, metal foil, or net.
[0038]
【The invention's effect】
As mentioned above, according to the manufacturing method of the 1st processing member of this invention, the removal agent which removes a predetermined gas component is interposed between the unbaking sheets which consist of PTFE in a facing state, and it extends in that state Thus, in order to integrate the green sheets and make them porous, a processing member having a removal agent interposed therein can be produced, and the thickness of the processing member is adjusted by setting the draw ratio. Therefore, the thickness can be easily reduced.
[0039]
Moreover, according to the manufacturing method of the 2nd processing member of this invention, in the manufacturing method of the said 1st processing member, after unbaking sheet | seats are integrated and made porous, after heat processing, in the case of extending | stretching Residual stress is removed, and the dimensional stability of the processing member is improved.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing an embodiment of a method for producing a processing member of the present invention.
FIG. 2 is an explanatory view showing a processing member obtained by the manufacturing method of the processing member.
FIG. 3 is an explanatory view showing an EL element incorporating the processing member.
FIG. 4 is an explanatory view showing a conventional adsorbent-containing porous container.
[Explanation of symbols]
1 Unbaked sheet 2 Remover

Claims (2)

A non- porous porous sheet made of polytetrafluoroethylene in a face-to-face state is interposed with a remover for removing a predetermined gas component, and the green sheets are integrated by stretching in that state. And a method for producing a treatment member characterized in that the treatment member is made porous.   2. The process member manufacturing method according to claim 1, wherein the unfired sheets are integrated and made porous, and then heat treated.

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