JP2005133032A - Adhesive for heat insulating material and carbonized laminated product for use in heat insulating material using the same - Google Patents
Adhesive for heat insulating material and carbonized laminated product for use in heat insulating material using the same Download PDFInfo
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本発明は、炭素成形体を層構成に有する断熱材用積層体に用いられる接着剤、それを用いた炭素化前の積層体、炭素化された積層体、及び該積層体の断熱材用用途に関し、更に詳しくは、高温炉用に適した接着剤とそれを用いてなる断熱材用積層体に関する。 The present invention relates to an adhesive used for a laminate for a heat insulating material having a carbon molded body in a layer structure, a laminate before carbonization using the same, a carbonized laminate, and a use of the laminate for a heat insulating material More particularly, the present invention relates to an adhesive suitable for a high temperature furnace and a laminate for a heat insulating material using the adhesive.
炭素繊維成形断熱材は、金属の熱処理、ファインセラミックスの焼結、各種結晶の引き上げ等に使用される真空炉や雰囲気炉等の高温炉の断熱材として、広く用いられている。炭素繊維成形断熱材の１形態として、断熱特性向上、炭素繊維粉の飛散防止、燒結金属から発生するガスの浸透防止等のために炭素繊維フェルト表面に炭素質接着剤を介して黒鉛シートを積層したものがある。このような炭素繊維フェルト表面に表面被覆材を積層した炭素繊維成形断熱材の製造に使用される接着剤として、レゾール型フェノール樹脂をエタノールを用いて希釈した溶液を使用した接着剤が特許文献１において提案されている。或いは、レゾール型フェノール樹脂とメタノールと炭素繊維粉からなる接着剤が特許文献２により提案されている。しかし、従来の接着剤を使用した場合、炭素繊維成形断熱材本体の炭素繊維フェルト層とこれら表面被覆層の接着が充分ではなく、昇温、冷却を繰り返す過程で表面被覆材層が膨れたり、剥離してしますという問題があった。 Carbon fiber molded heat insulating materials are widely used as heat insulating materials for high temperature furnaces such as vacuum furnaces and atmospheric furnaces used for heat treatment of metals, sintering of fine ceramics, pulling of various crystals, and the like. As a form of carbon fiber molded insulation, a graphite sheet is laminated on the carbon fiber felt surface with a carbonaceous adhesive to improve heat insulation properties, prevent carbon fiber powder from scattering, and prevent gas permeation from sintered metal. There is what I did. Patent Document 1 discloses an adhesive using a solution obtained by diluting a resol type phenolic resin with ethanol as an adhesive used for manufacturing a carbon fiber molded heat insulating material in which a surface coating material is laminated on the surface of such a carbon fiber felt. Has been proposed in Alternatively, Patent Document 2 proposes an adhesive made of a resol type phenol resin, methanol, and carbon fiber powder. However, when a conventional adhesive is used, the adhesion between the carbon fiber felt layer of the carbon fiber molded heat insulating body and these surface coating layers is not sufficient, and the surface coating material layer swells in the process of repeated heating and cooling, There was a problem of peeling.
本発明の一つの目的は、炭素成形体を層構成に有する積層物からなる断熱材において、昇温、降温を繰り返す過程で層の剥がれ、膨れが発生しない断熱材用接着剤及びそれを用いた積層体を提供することである。本発明の別な目的は、昇温、降温を繰り返す過程で層の剥がれ、膨れが発生しない炭素化積層体を提供することであり、炭素化積層体の用途として、昇温、降温を繰り返す過程で層の剥がれ膨れが発生し難い断熱材用積層体を提供することである。 One object of the present invention is to use an adhesive for a heat insulating material that does not cause peeling or swelling of a layer in a process of repeatedly raising and lowering temperature in a heat insulating material made of a laminate having a carbon molded body in a layer structure. It is to provide a laminate. Another object of the present invention is to provide a carbonized laminate in which peeling of layers and swelling do not occur in the process of repeatedly raising and lowering temperature, and as a use of the carbonized laminate, a process of repeatedly raising and lowering temperature. It is an object to provide a laminate for a heat insulating material in which peeling and swelling of layers hardly occur.
本発明は従来、接着剤において用いられる溶剤としては、接着剤のマトリックスを構成する炭素化材を溶解させるものであれば、何でも良いと思われていたが、炭素化材を溶解させるだけでなく、その溶剤の種類も得られる断熱材の性状に影響を及ぼすこと、更に該溶剤として複素環式化合物を用いることで、本発明の課題が解決されることを見出したことに基づく。 Conventionally, the present invention has been thought to be anything as long as it can dissolve the carbonized material constituting the adhesive matrix as a solvent used in the adhesive. Further, it is based on the finding that the type of the solvent affects the properties of the heat insulating material to be obtained, and that the problem of the present invention is solved by using a heterocyclic compound as the solvent.
即ち、本発明の第１は、接着剤が、
（１）炭化率４０％以上の炭素化材、
（２）該炭素化材を溶解する複素環式化合物、及び
（３）炭素短繊維又は該複素環式化合物に不溶な炭素化可能な短繊維からなる断熱材用接着剤を提供する。
本発明の第２は、炭素化材１００質量部、複素環式化合物５〜１５０質量部、炭素単繊維又は該複素環式化合物に不溶な炭素化可能な短繊維５〜８０質量部から前記第１の発明の断熱材用接着剤を提供する。
本発明の第３は、複素環式化合物の環を構成する元素として酸素を有する前記第１又は第２の発明の断熱材用接着剤を提供する。
本発明の第４は、複素環式化合物がフリル基を有する化合物である前記第１〜第３のいずれかの発明の断熱材用接着剤を提供する。
本発明の第５は、フリル基を有する化合物が２−フリルメタノール及び／又は２−フリルアルデヒドである前記第４の発明の断熱材用接着剤を提供する。
本発明の第６は、炭素短繊維又は複素環式化合物に不溶である炭素化可能な短繊維が、平均繊維長０．０２〜２ｍｍ、２００≧Ｌ／Ｄ≧５である前記第１〜第５のいずれかの発明の断熱材用接着剤を提供する。
本発明の第７は、炭素短繊維又は該複素環式化合物に不溶な炭素化可能な短繊維が炭素短繊維である前記第１〜第６のいずれかの発明の断熱用接着剤を提供する。
That is, the first of the present invention is that the adhesive is
(1) Carbonized material having a carbonization rate of 40% or more,
(2) Provided is an adhesive for a heat insulating material comprising a heterocyclic compound that dissolves the carbonized material, and (3) a short carbon fiber or a short carbon fiber that is insoluble in the heterocyclic compound.
The second aspect of the present invention is that the carbonized material is 100 parts by mass, the heterocyclic compound is 5 to 150 parts by mass, the carbon monofilament or 5 to 80 parts by mass of carbonizable short fibers that are insoluble in the heterocyclic compound. The adhesive for heat insulating materials of 1 invention is provided.
According to a third aspect of the present invention, there is provided the adhesive for a heat insulating material according to the first or second aspect, wherein oxygen is contained as an element constituting a ring of the heterocyclic compound.
According to a fourth aspect of the present invention, there is provided the adhesive for a heat insulating material according to any one of the first to third aspects, wherein the heterocyclic compound is a compound having a furyl group.
5th of this invention provides the adhesive for heat insulating materials of the said 4th invention whose compound which has a furyl group is 2-furyl methanol and / or 2-furyl aldehyde.
According to a sixth aspect of the present invention, the carbonizable short fiber that is insoluble in the carbon short fiber or the heterocyclic compound has an average fiber length of 0.02 to 2 mm and 200 ≧ L / D ≧ 5. An adhesive for a heat insulating material according to any one of 5 is provided.
According to a seventh aspect of the present invention, there is provided the heat insulating adhesive according to any one of the first to sixth aspects, wherein the short carbon fibers or the short carbon fibers insoluble in the heterocyclic compound are carbon short fibers. .
本発明の第８は、炭素化成形体の少なくとも片面に接着剤が展着され他の成形体と積層された積層体であり、該接着剤が前記第１〜７のいずれかの発明の断熱材用接着剤である炭素化前の積層体を提供する。
本発明の第９は、接着剤が展着された炭素化成形体の内部の構造が密である積層体であって、接着剤を構成する複素環式化合物が炭素化成形体のマトリックスを膨潤する前記第８の発明の炭素化前の積層体を提供する。
本発明の第１０は、接着剤が展着された炭素化成形体が黒鉛シートである前記第９の発明の積層体を提供する。
An eighth aspect of the present invention is a laminate in which an adhesive is spread on at least one side of a carbonized molded body and laminated with another molded body, and the adhesive is a heat insulating material according to any one of the first to seventh aspects of the present invention. A laminate before carbonization, which is an adhesive for use, is provided.
A ninth aspect of the present invention is a laminate in which the structure inside the carbonized molded body on which the adhesive is spread is dense, and the heterocyclic compound constituting the adhesive swells the matrix of the carbonized molded body The laminated body before carbonization of 8th invention is provided.
A tenth aspect of the present invention provides the laminate according to the ninth aspect, wherein the carbonized molded article on which the adhesive is spread is a graphite sheet.
本発明の第１１は、接着剤が展着された炭素化成形体の内部の構造が粗である前記第８の発明の炭素化前の積層体を提供する。
本発明の第１２は、接着剤が展着された炭素化成形体が炭素繊維フェルト、炭素繊維含有ペーパー及び炭素繊維クロスから選ばれた少なくとも一種である前記第１１の発明の炭素化前の積層体を提供する。
本発明の第１３は、炭素化成形体の少なくとも片面に接着剤が展着され他の成形体と積層され、炭素化された積層体であり、該接着剤が、
（１）炭化率４０％以上の炭素化材、
（２）該炭素化材を溶解し、且つ炭素化成形体のマトリックスを膨潤する複素環式化合物、及び
（３）炭素短繊維又は該複素環式化合物に不溶な炭素化可能な短繊維からなる断熱材用接着剤である炭素化積層体を提供する。
本発明の第１４は、接着剤が展着された炭素化成形体の内部の構造が密である積層体であって、接着剤を構成する複素環式化合物が炭素化成形体のマトリックスを膨潤する第１３の発明の炭素化積層体を提供する。
本発明の第１５は、接着剤が展着された炭素化成形体の内部の構造が粗である前記第１３の発明の炭素化積層体を提供する。
本発明の第１６は、接着剤の構成成分である複素環式化合物の環を構成する元素として酸素を有する化合物である前記第１３〜第１５のいずれかの発明の炭素化積層体を提供する。
本発明の第１７は、複素環式化合物がフリル基を有する化合物である前記第１６の発明の炭素化積層体を提供する。
本発明の第１８は、フリル基を有する化合物が２−フリルメタノール及び／又は２−フリルアルデヒドの少なくともいずれかである前記第１７の発明の炭素化積層体を提供する。
本発明の第１９は、接着剤の構成成分である短繊維が、平均繊維長０．０２〜２ｍｍ、Ｌ／Ｄ≧５である前記第１４〜第１８のいずれかの発明の炭素化積層体を提供する。
本発明の第２０は、接着剤の構成成分である炭素短繊維又は該複素環式化合物に不溶である炭素化可能な短繊維が炭素短繊維である前記第１３〜第１９のいずれかの発明の炭素化積層体を提供する。
本発明の第２１は、接着剤が展着された炭素化成形体が黒鉛シートである前記第１３、第１４、第１６〜第２０のいずれかの発明の炭素化積層体を提供する。
本発明の第２２は、接着剤が展着された炭素化成形体が炭素繊維フェルト、炭素繊維含有ペーパー及び炭素繊維クロスから選ばれる少なくとも一種である第１３、第１５〜第２１のいずれかの発明の炭素化積層体を提供する。
本発明の第２３は、断熱材用である第１３〜第２２のいずれかの発明の炭素化積層体を提供する。
The eleventh aspect of the present invention provides the laminate before carbonization according to the eighth aspect, in which the structure inside the carbonized molded article on which the adhesive is spread is rough.
According to a twelfth aspect of the present invention, the carbonized molded article having the adhesive spread thereon is at least one selected from carbon fiber felt, carbon fiber-containing paper, and carbon fiber cloth. I will provide a.
A thirteenth aspect of the present invention is a carbonized laminate in which an adhesive is spread on at least one side of the carbonized molded body and laminated with another molded body, and the adhesive is
(1) Carbonized material having a carbonization rate of 40% or more,
(2) A heterocyclic compound which dissolves the carbonized material and swells the matrix of the carbonized molded body, and (3) a heat insulating material comprising carbon short fibers or short carbon fibers insoluble in the heterocyclic compound. A carbonized laminate that is an adhesive for a material is provided.
According to a fourteenth aspect of the present invention, there is provided a laminated body having a dense internal structure of a carbonized molded article on which an adhesive is spread, wherein the heterocyclic compound constituting the adhesive swells the matrix of the carbonized molded article. The carbonized laminate of the thirteenth invention is provided.
The fifteenth aspect of the present invention provides the carbonized laminate according to the thirteenth aspect, in which the structure inside the carbonized molded body on which the adhesive is spread is rough.
According to a sixteenth aspect of the present invention, there is provided the carbonized laminate according to any one of the thirteenth to fifteenth aspects, wherein the carbonized laminate is a compound having oxygen as an element constituting a ring of a heterocyclic compound that is a constituent component of an adhesive. .
The seventeenth aspect of the present invention provides the carbonized laminate according to the sixteenth aspect, wherein the heterocyclic compound is a compound having a furyl group.
The eighteenth aspect of the present invention provides the carbonized laminate according to the seventeenth aspect, wherein the compound having a furyl group is at least one of 2-furylmethanol and / or 2-furylaldehyde.
A nineteenth aspect of the present invention is the carbonized laminate according to any one of the fourteenth to eighteenth aspects, wherein the short fibers that are constituent components of the adhesive have an average fiber length of 0.02 to 2 mm and L / D ≧ 5. I will provide a.
A twentieth aspect of the present invention is the invention according to any one of the thirteenth to nineteenth aspects, wherein the carbon short fibers that are constituents of the adhesive or the carbonizable short fibers that are insoluble in the heterocyclic compound are carbon short fibers. A carbonized laminate is provided.
A twenty-first aspect of the present invention provides the carbonized laminate according to any one of the thirteenth, fourteenth, and sixteenth to twentieth inventions, wherein the carbonized molded article on which the adhesive is spread is a graphite sheet.
According to a twenty-second aspect of the present invention, any of the thirteenth and fifteenth to twenty-first inventions, wherein the carbonized molded article on which the adhesive is spread is at least one selected from carbon fiber felt, carbon fiber-containing paper, and carbon fiber cloth. A carbonized laminate is provided.
A twenty-third aspect of the present invention provides the carbonized laminate according to any one of the thirteenth to twenty-second aspects, which is used for a heat insulating material.
本発明によれば、断熱材用接着剤として複素環式化合物を含む特定の接着剤を用いることにより、強固に接着された炭素化積層体が得られ、その断熱材としての積層体は、昇温、高温を繰り返す過程で層の剥がれ、膨れの発生がほとんど起こらない断熱材用途の炭素化積層体を提供することができる。 According to the present invention, by using a specific adhesive containing a heterocyclic compound as an adhesive for a heat insulating material, a strongly bonded carbonized laminate can be obtained. It is possible to provide a carbonized laminate for use as a heat insulating material in which layer peeling and swelling are hardly caused in the process of repeating temperature and high temperature.
以下、本発明を詳細に説明する。
本発明における断熱材用接着剤は、（１）炭化率４０％以上の炭素化材、（２）該炭素化材を溶解する複素環式化合物、及び（３）炭素短繊維又は該複素環式化合物に不溶な炭素化可能な短繊維からなっている。以下、断熱材用接着剤について説明する。
本発明の断熱材用接着剤（以下、接着剤と称することもある）を構成する炭化率４０％以上の炭素化材しては、非酸化性雰囲気下、８００℃で炭化されて炭化率が４０％以上になるものであれば特に制限はない。好ましくは５０％以上、特に好ましくは６０％以上のものが用いられる。具体的には、ポリウレタン、ポリイソシアネート、ポリイミド、フェノール樹脂、フラン樹脂、ユリア樹脂、ポリエステル樹脂、エポキシ樹脂等の熱硬化性樹脂やピッチ、コールタールが例示される。これらの中で炭化歩留まりが高い樹脂が好ましく、フェノール樹脂が特に好ましく用いられる。フェノール樹脂としては、レゾール型フェノール樹脂とノボラック型フェノール樹脂のいずれでもよいし、両者を併用してもよい。
Hereinafter, the present invention will be described in detail.
The adhesive for a heat insulating material in the present invention includes (1) a carbonized material having a carbonization rate of 40% or more, (2) a heterocyclic compound that dissolves the carbonized material, and (3) a carbon short fiber or the heterocyclic compound. It consists of short carbonizable fibers that are insoluble in the compound. Hereinafter, the adhesive for heat insulating materials will be described.
The carbonized material having a carbonization rate of 40% or more constituting the adhesive for heat insulating material of the present invention (hereinafter also referred to as an adhesive) is carbonized at 800 ° C. in a non-oxidizing atmosphere and has a carbonization rate. There is no particular limitation as long as it is 40% or more. Preferably, 50% or more, particularly preferably 60% or more is used. Specific examples include thermosetting resins such as polyurethane, polyisocyanate, polyimide, phenol resin, furan resin, urea resin, polyester resin, and epoxy resin, pitch, and coal tar. Among these, resins having a high carbonization yield are preferable, and phenol resins are particularly preferably used. As a phenol resin, either a resol type phenol resin or a novolac type phenol resin may be used, or both may be used in combination.
本発明の断熱材用接着剤を構成する成分の一つである複素環式化合物としては、前記の炭素化材を溶解するものでなければならない。複素環式化合物の沸点未満の温度で溶解すればよいが、常温で溶解するものであればさらに好ましい。複素環式化合物としては、３員環、４員環、５員環、６員環等任意のものが用いられる。また、複素環式化合物しては、環を構成する元素が酸素を有するものが好ましく用いられる。具体的には、２−フリルメタノール、２−フリルアルデヒドが好ましく用いられる。
該複素環式化合物の使用量は炭素化材を溶解する限り、制限されないが、実用的には複素環式化合物として溶解性のよいものを選択して、炭素化材１００質量部に対し、複素環式化合物５〜１５０質量部、好ましくは１０〜１３０質量部、更に好ましくは１５〜１００質量部が採用される。
As a heterocyclic compound which is one of the components constituting the adhesive for a heat insulating material of the present invention, the above carbonized material must be dissolved. What is necessary is just to melt | dissolve at the temperature below the boiling point of a heterocyclic compound, but if it melt | dissolves at normal temperature, it is still more preferable. As a heterocyclic compound, arbitrary things, such as a 3-membered ring, a 4-membered ring, a 5-membered ring, a 6-membered ring, are used. As the heterocyclic compound, those in which the element constituting the ring has oxygen are preferably used. Specifically, 2-furylmethanol and 2-furylaldehyde are preferably used.
The amount of the heterocyclic compound used is not limited as long as the carbonized material is dissolved. However, in practice, a compound having good solubility is selected as the heterocyclic compound, and the amount of the heterocyclic compound is calculated based on 100 parts by mass of the carbonized material. 5-150 mass parts of cyclic compounds, Preferably it is 10-130 mass parts, More preferably, 15-100 mass parts is employ | adopted.
本発明における接着剤は前記炭素化材とその溶剤である複素環式化合物だけであると、接着強度が弱いので、炭素短繊維又は前記複素環式化合物に不溶な炭素化可能な短繊維が用いられる。また、かかる短繊維がないと、「だま」（未溶解の粉体のままの塊）ができやすいが、短繊維があると「だま」ができないように均一分散が可能となる。中でも炭素短繊維は接着後の被接着面とのアンカー効果が高まり、被接着物が黒鉛シート、炭素繊維クロス、炭素繊維含有ぺ一パー等のような硬さを有するものの場合には、炭素短繊維があると接着剤の炭素化時の熱収縮を抑制できるので好ましい。本発明において炭素化とは、温度８００℃以上、２０００℃未満での焼成処理、および温度２０００℃以上、３０００℃以下での黒鉛化処理を含めた意味で用いる。複素環式化合物に不溶な炭素化可能な繊維としては、ポリアクリロニトリル繊維が好適である。
炭素短繊維又は複素環式化合物に不溶な炭素化可能な短繊維としては、平均繊維長０．０２〜２ｍｍ、２００≧Ｌ／Ｄ≧５、好ましくは平均繊維長０．０５〜１．５ｍｍ、１５０≧Ｌ／Ｄ≧６、特に好ましくは平均繊維長０．１〜１．３ｍｍ、１３０≧Ｌ／Ｄ≧１０のものが用いられる。平均繊維長の値が大き過ぎると、接着面に接着剤を展着し難くなる。また、平均繊維長の値が小さ過ぎると、アンカー効果が弱まり、だまの発生を抑え難くなる。Ｌ／Ｄが大き過ぎると、短繊維の均一な分散が困難になり、小さ過ぎると、短繊維による接着剤層の補強効果が得られなくなる。また、かかる短繊維は炭素化材１００質量部に対し、５〜８０質量部、好適には１０〜５０質量部が用いられる。
これらの中で、上記の平均繊維長及びＬ／Ｄを有する炭素短繊維が好ましく用いられる。
Since the adhesive in the present invention is only the carbonized material and the heterocyclic compound that is the solvent thereof, the adhesive strength is weak. Therefore, carbon short fibers or short fibers that can be carbonized insoluble in the heterocyclic compounds are used. It is done. Further, without such short fibers, “dama” (lumps of undissolved powder) is likely to be formed, but with short fibers, uniform dispersion is possible so that “dama” cannot be produced. Among them, carbon short fibers have an increased anchor effect with the bonded surface after bonding, and when the adherend has a hardness such as graphite sheet, carbon fiber cloth, carbon fiber-containing paper, The presence of fibers is preferable because thermal shrinkage during carbonization of the adhesive can be suppressed. In the present invention, carbonization is used in the meaning including a baking treatment at a temperature of 800 ° C. or more and less than 2000 ° C., and a graphitization treatment at a temperature of 2000 ° C. or more and 3000 ° C. or less. As the carbonizable fiber that is insoluble in the heterocyclic compound, polyacrylonitrile fiber is suitable.
As short carbon fibers that are insoluble in carbon short fibers or heterocyclic compounds, the average fiber length is 0.02 to 2 mm, 200 ≧ L / D ≧ 5, preferably the average fiber length is 0.05 to 1.5 mm, 150 ≧ L / D ≧ 6, particularly preferably those having an average fiber length of 0.1 to 1.3 mm and 130 ≧ L / D ≧ 10 are used. If the average fiber length is too large, it will be difficult to spread the adhesive on the bonding surface. On the other hand, if the value of the average fiber length is too small, the anchor effect is weakened and it is difficult to suppress the occurrence of fouling. When L / D is too large, uniform dispersion of the short fibers becomes difficult, and when L / D is too small, the reinforcing effect of the adhesive layer by the short fibers cannot be obtained. Further, such short fibers are used in an amount of 5 to 80 parts by mass, preferably 10 to 50 parts by mass with respect to 100 parts by mass of the carbonized material.
Among these, carbon short fibers having the above average fiber length and L / D are preferably used.
本発明における接着剤は、この他、適宜、黒鉛粉末を包んでいてもよい。黒鉛粉末は熱収縮を抑え、剥がれを少なくする効果があるので、被接着物が炭素化される場合には、黒鉛粉末を包んでいることが望ましい。多すぎても接着性を妨げるので、炭素化材１００質量部に対し、好ましくは１０〜８０質量部、更に好ましくは２０〜６０質量部用いられる。 In addition to this, the adhesive in the present invention may appropriately enclose graphite powder. Since graphite powder has the effect of suppressing thermal shrinkage and reducing peeling, it is desirable that graphite powder be wrapped when the adherend is carbonized. Since adhesiveness will be prevented even if it is too much, it is preferably 10 to 80 parts by mass, more preferably 20 to 60 parts by mass with respect to 100 parts by mass of the carbonized material.
また、本発明の接着剤は複素環式化合物を溶解する希釈剤を用いてもよい。例えば、接着剤を常温で刷毛塗りするような場合には、希釈剤を用い粘度を調整し接着剤を均一に被接着面に展着させることが好ましい。かかる希釈剤としては、アルコール類、ケトン類、水などが例示され、メタノール、エタノール プロピルアルコール、イソプロピルアルコールなどが好適に用いられる。このような希釈剤の量は複素環式化合物と透明な一つの液相を呈する程度であれば、制限されない。希釈剤は、本発明の断熱用接着剤を被接着物の表面に塗布する作業に適した粘度に適宜調整する際に用いることができる。 The adhesive of the present invention may use a diluent that dissolves the heterocyclic compound. For example, when brushing the adhesive at room temperature, it is preferable to adjust the viscosity using a diluent and spread the adhesive uniformly on the surface to be bonded. Examples of such diluents include alcohols, ketones, water and the like, and methanol, ethanol propyl alcohol, isopropyl alcohol and the like are preferably used. The amount of such a diluent is not limited as long as it exhibits a single liquid phase transparent to the heterocyclic compound. The diluent can be used when appropriately adjusting the viscosity suitable for the operation of applying the heat insulating adhesive of the present invention to the surface of the adherend.
本発明の断熱材用接着剤は、特定の順序なしに加え、攪拌機等で均一に混合、或いは分散して好ましくは５〜２０ｍＰａ・ｓ、更には１０〜１５ｍＰａ・ｓ（２０℃）の粘度範囲で用いることができる。該接着剤を用い、炭素化成形体の面に、刷毛、噴霧器等により展着（塗工）し、他の炭素化成形体を接着させて積層し、炭素化前の積層体を形成する。 The adhesive for a heat insulating material of the present invention is added in a specific order, and is uniformly mixed or dispersed with a stirrer or the like, preferably in a viscosity range of 5 to 20 mPa · s, more preferably 10 to 15 mPa · s (20 ° C.). Can be used. Using this adhesive, the surface of the carbonized molded body is spread (coated) with a brush, a sprayer, or the like, and another carbonized molded body is bonded and laminated to form a laminated body before carbonization.
炭素化成形体の少なくとも片面に前記断熱材用接着剤が展着され他の成形体と積層された炭化前の積層体の発明について説明する。
本発明の積層体に用いる接着剤としては、前記の断熱材用接着剤が適用できる。本発明の炭化前の積層体を構成する炭素成形体とは、炭素だけを有する成形体という狭い意味ではなく、非酸化性雰囲気下、８００℃での炭化率が好ましくは４０％以上、更に好ましくは５０％以上、最も好ましくは６０％以上の炭素成形体、非酸化性雰囲気下、２０００℃で炭化されて炭化率が４０％以上、更に好ましくは５０％以上、最も好ましくは６０％以上の成形体（黒鉛成形体と云うこともある）、および前記のような炭化率が達成可能な成形体（炭素化可能な成形体）を含んだ意味で用いられる。本発明の積層体を構成する炭素成形体の具体的な例としては、炭素繊維フィラメント、炭素繊維クロス、炭素繊維含有ペーパー、黒鉛シート等を挙げることができる。これらのものは、炭素繊維、或いは黒鉛材料にマトリックスとして、前記炭化率を満たすような炭素化可能な樹脂、例えばポリウレタン、ポリイソシアネート、ポリイミド、フェノール樹脂、フラン樹脂、ユリア樹脂、ポリエステル樹脂、エポキシ樹脂等を含浸し、或いは、含浸することなく焼成して製造される。
The invention of the laminate before carbonization in which the adhesive for heat insulating material is spread on at least one surface of the carbonized molded body and laminated with another molded body will be described.
As the adhesive used in the laminate of the present invention, the above-mentioned adhesive for heat insulating material can be applied. The carbon molded body constituting the laminate before carbonization of the present invention is not a narrow meaning of a molded body having only carbon, and the carbonization rate at 800 ° C. in a non-oxidizing atmosphere is preferably 40% or more, and more preferably. 50% or more, most preferably 60% or more of a carbon molded body, carbonized at 2000 ° C. in a non-oxidizing atmosphere and having a carbonization rate of 40% or more, more preferably 50% or more, most preferably 60% or more. And a molded body (carbonized molded body) that can achieve the carbonization rate as described above. Specific examples of the carbon molded body constituting the laminate of the present invention include carbon fiber filament, carbon fiber cloth, carbon fiber-containing paper, graphite sheet and the like. These are carbon fibers or graphite materials that can be used as a matrix to form a carbonizable resin that satisfies the carbonization rate, such as polyurethane, polyisocyanate, polyimide, phenol resin, furan resin, urea resin, polyester resin, epoxy resin. It is produced by impregnating or the like and firing without impregnation.
本発明の積層体においては、前記炭素化成形体の少なくとも片面に前記接着剤が展着（塗布）され、接着剤の展着面に他の成形体が積層された積層体である。この積層体を構成する他の成形体とは、該積層体が炭素化されるときに炭素化されるものであれば、特に限定するものではないが、前記炭素化成形体であることが好ましい。 The laminate of the present invention is a laminate in which the adhesive is spread (applied) on at least one side of the carbonized molded body, and another molded body is laminated on the spread surface of the adhesive. The other molded body constituting the laminate is not particularly limited as long as it is carbonized when the laminate is carbonized, but the carbonized molded body is preferable.
接着剤は、前記の炭素化成形体の少なくとも片面に展着される。炭素化成形体には、形態的に成形体の内部構造が密である成形体、成形体内部が隙間なく充填された成形体、例えば、黒鉛シートや炭素化可能なＣＦＲＰ及び形態的に成形体の内部構造が粗な成形体、成形体内部に隙間のある状態に充填された成形体、例えば炭素繊維フェルト、炭素繊維含有ペーパー、及び炭素繊維クロスがある。これらのうち、接着剤が展着される成形体で、成形体の内部構造が密である成形体は、黒鉛シートが好ましく用いられる。また、成形体の内部構造が粗な成形体としては、炭素繊維フェルト、炭素繊維含有ペーパー、及び炭素繊維クロスから選ばれる少なくとも一種の成形体が好ましく用いられる。
接着剤の展着量は、展着する成形体の内部構造が密な成形体か、粗な成形体かにより異なるが、成形体１ｍ2に対して、接着剤好ましくは１００〜１５００ｇ、更に好ましくは３００〜１０００ｇ、最も好ましくは４００〜８００ｇである。
The adhesive is spread on at least one side of the carbonized molded body. The carbonized molded body includes a molded body having a densely shaped internal structure, a molded body filled with no gap between the molded body, such as a graphite sheet, a carbonizable CFRP, and a morphologically molded body. There are molded bodies having a rough internal structure, and molded bodies filled with a gap inside the molded body, such as carbon fiber felt, carbon fiber-containing paper, and carbon fiber cloth. Among these, a graphite sheet is preferably used for a molded body in which the adhesive is spread and the molded body has a dense internal structure. Moreover, as a molded object whose internal structure of a molded object is rough, at least 1 type of molded object chosen from carbon fiber felt, carbon fiber containing paper, and carbon fiber cloth is used preferably.
The spread amount of the adhesive varies depending on whether the inner structure of the molded body to be spread is a dense molded body or a rough molded body, but the adhesive is preferably 100 to 1500 g, more preferably 1 m 2 of the molded body. Is 300 to 1000 g, most preferably 400 to 800 g.
前記接着剤を構成する複素環式化合物は、その沸点未満の温度で、好ましくは常温で、前記炭素化成形体のマトリックスを膨潤させるものでなければならない。接着剤が展着される炭素化成形体の内部構造が密な、例えば黒鉛シートの場合は、成形体の場合には、黒鉛シートそのものがマトリックスであるので、黒鉛シートそのものが膨潤され、接着剤の１成分である炭素化材が黒鉛シート内部に含浸される。ここで、マトリックスとは成形体が繊維と他の炭素化物からなる場合には、他の炭素化物がマトリックスであり、黒鉛シートのように繊維に相当するものがなくマトリックスだけの場合には、黒鉛シート自体がマトリックスとなる。この様な複素環式化合物としては、２−フリルメタノール及び／又は２−フリルアルコールが好ましい。また、接着剤が展着される炭素化成形体の内部構造が粗な成形体であって、成形体内部に隙間のある状態に充填された成形体、例えば、炭素繊維フェルトの場合は、前記接着剤の１成分である炭素化材が、成形体内部の隙間を通り炭素繊維と絡むことにより接着強度の向上に寄与する。このような場合は、複素環式化合物は炭素繊維フェルトのマトリックスを膨潤するものである必要はない。ここで、膨潤とは複素環式化合物中に数センチ程度の大きさの接着剤が展着された成形体のマトリックス材料を浸漬して、室温で５日放置したときの目視による観察で、膨れた箇所の存在が認められる場合を云う。 The heterocyclic compound constituting the adhesive must swell the matrix of the carbonized molded body at a temperature below its boiling point, preferably at room temperature. In the case of a graphite sheet, for example, in the case of a graphite sheet, the graphite sheet itself is a matrix. One component carbonized material is impregnated inside the graphite sheet. Here, the matrix refers to the case where the molded body is composed of fibers and other carbonized materials, and the other carbonized materials are matrices. The sheet itself is a matrix. As such a heterocyclic compound, 2-furyl methanol and / or 2-furyl alcohol are preferable. Further, in the case of a molded body in which the internal structure of the carbonized molded body on which the adhesive is spread is rough and filled with a gap in the molded body, for example, a carbon fiber felt, the adhesion The carbonized material which is one component of the agent contributes to the improvement of the adhesive strength by being entangled with the carbon fiber through the gap inside the molded body. In such cases, the heterocyclic compound need not swell the matrix of carbon fiber felt. Here, the swelling means swelling by observing when a matrix material of a molded body in which an adhesive having a size of several centimeters is spread in a heterocyclic compound and left at room temperature for 5 days. This is the case where the presence of a spot is recognized.
炭素化前の積層体は、通常、炭素繊維フェルト等に、市販の含浸液を含浸させて含浸した樹脂を硬化させた炭素化成形体の片面又は両面に本発明の断熱用接着剤を刷毛、或いは噴霧手段により塗工し、接着剤の塗工面に他の成形体を積層し、１５０℃程度で、加圧することなく積層し、次いで数分〜３時間圧縮成形し、樹脂を硬化させて得ることができる。用いる接着剤は、接着剤の発明において記載した特徴、性質が全て適用される。具体的な例としては、片面に本発明の断熱用接着剤を刷毛で塗工した黒鉛シート（東洋炭素（株）製、「パーマホイル」）と市販のフェノール系含浸液（昭和高分子（株）製、「ショウノールＢＲＳ−３８９６」）を含浸させ平板６層に積層した炭素繊維フェルトを、１５０℃、圧力０．０１５ＭＰａで１４０分間圧縮成形し、樹脂を硬化させた炭素化前の積層体、及び該積層体の炭素化処理（黒鉛処理）の例を実施例１に挙げた。 The laminate before carbonization is usually brushed with the heat-insulating adhesive of the present invention on one or both sides of a carbonized molded article obtained by impregnating a commercially available impregnating solution into carbon fiber felt or the like and curing the impregnated resin, or Applying by spraying means, laminating another molded body on the coated surface of the adhesive, laminating at about 150 ° C. without applying pressure, then compression molding for several minutes to 3 hours, and curing the resin. Can do. All the characteristics and properties described in the adhesive invention are applied to the adhesive used. As a specific example, a graphite sheet (manufactured by Toyo Tanso Co., Ltd., “Permafoil”) coated with the heat-insulating adhesive of the present invention with a brush on one side and a commercially available phenolic impregnating liquid (Showa Polymer Co., Ltd.) ), Carbon fiber felt impregnated with "Shonol BRS-3896") and laminated on 6 flat plates was compression molded at 150 ° C and pressure 0.015MPa for 140 minutes to harden the resin before carbonization Examples of carbonization treatment (graphite treatment) of the laminate were listed in Example 1.
前記炭素化前の積層体を、更に、窒素ガス、アルゴンガス等の不活性雰囲気中或いは真空中（真空度５ｋＰａ以下）、好ましくは温度１８００〜２６００℃、更に好ましくは１９００〜２５００℃、最も好ましくは２０００〜２４００℃で、好ましくは２時間以下炭素化処理（黒鉛化処理）し、炭素化された積層体を得ることができる。この様にして得られる炭素化積層体は、炭素繊維フェルト層の嵩密度も高く、該炭素化積層体を黒鉛シートが高温側になるように真空炉内に設置し、次いで温度２０００℃までの昇温、降温の熱サイクル繰り返す過程で、層の剥がれ、膨れの発生が極めて少なく、真空炉用断熱材として好適に用いることができる。
尚、本発明の炭素化前の積層体及び炭素化積層体には、適宜、本発明の断熱材用接着剤を用いて新たな炭素化成形体を積層し、炭素化処理を行い接着剤を炭素化し新たに積層した炭素化成形体層と強固に結合した炭素化積層体を得ることができる。
The laminate before carbonization is further in an inert atmosphere such as nitrogen gas or argon gas or in a vacuum (degree of vacuum of 5 kPa or less), preferably a temperature of 1800 to 2600 ° C, more preferably 1900 to 2500 ° C, most preferably Can be carbonized (graphitized) at 2000 to 2400 ° C., preferably 2 hours or less, to obtain a carbonized laminate. The carbonized laminate obtained in this manner has a high bulk density of the carbon fiber felt layer, and the carbonized laminate is placed in a vacuum furnace so that the graphite sheet is on the high temperature side, and then up to a temperature of 2000 ° C. In the process of repeating the heat cycle of raising and lowering temperature, the occurrence of layer peeling and blistering is extremely small, and it can be suitably used as a heat insulating material for a vacuum furnace.
In addition, a new carbonized molded body is appropriately laminated on the laminate before carbonization and the carbonized laminate of the present invention using the adhesive for a heat insulating material of the present invention, and carbonization treatment is performed to convert the adhesive into carbon. Thus, a carbonized laminate that is firmly bonded to the newly laminated carbonized molded body layer can be obtained.
（実施例）
以下、実施例により本発明を具体的に説明するが、本発明はこれらに限定されるものではない。実施例の評価は、以下に示す通りである。
平均繊維長
３０ｍｌの三角フラスコに１０ｍｌのスポイトで５ｍｌの流動パラフィンを量り取る。使用する炭素短繊維からランダムにミクロスパチュラでサンプリングし、前記三角フラスコに加えた後、混合して流動パラフィンに分散させる。この分散液から分注器で３００μ１を取り、１枚目のスライドガラスに付け、２枚目のスライドガラスを重ねて圧着させる。これを画像解析装置（ニレコ（株）製、ルーゼックスIIIＵを使用）に取り付け、１０００〜１３００本の測定本数で単繊維の繊維長を測定し、平均繊維長（数平均）を求める。
昇温、冷却の熱サイクル試験
試料を真空炉内に設置し炉内雰囲気を窒素置換した後、窒素を少量流入しながら真空度５ｋＰａ以下にし、その状態で常温から昇温速度４１℃／時間で２０００℃まで昇温して、２０００℃で１時間保持し、次いでヒーターの電源を切り、３００℃まで自然冷却し、３００℃となった後は試料を炉から取り出し、自然冷却した。このサイクルは約７２時間／サイクルであった。このサイクルを繰り返し、サンプルに膨れ、剥がれが認められたとき迄の繰り返し回数で、接着剤の接着性を評価する。
(Example)
EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto. The evaluation of the examples is as follows.
Weigh 5 ml of liquid paraffin with a 10 ml dropper into an Erlenmeyer flask with an average fiber length of 30 ml. The carbon short fibers to be used are randomly sampled with a micro spatula, added to the Erlenmeyer flask, and then mixed and dispersed in liquid paraffin. 300 μl is taken from this dispersion with a dispenser, attached to the first slide glass, and the second slide glass is stacked and pressure-bonded. This is attached to an image analyzer (manufactured by Nireco Corporation, using Luzex IIIU), and the fiber length of single fibers is measured with 1000 to 1300 measurement lines, and the average fiber length (number average) is obtained.
Thermal cycle test of temperature rise and cooling After placing the sample in a vacuum furnace and replacing the atmosphere in the furnace with nitrogen, the degree of vacuum was reduced to 5 kPa or less while flowing a small amount of nitrogen, and in this state, the temperature was increased from room temperature at a rate of 41 ° C./hour. The temperature was raised to 2000 ° C. and held at 2000 ° C. for 1 hour, and then the heater was turned off and naturally cooled to 300 ° C. After reaching 300 ° C., the sample was taken out of the furnace and naturally cooled. This cycle was about 72 hours / cycle. This cycle is repeated, and the adhesiveness of the adhesive is evaluated by the number of repetitions until the sample is swollen and peeled off.
（実施例１）
ピッチ系炭素繊維（呉羽化学工業（株）製、「クレカフェルトＦ−１１０」）１００質量部に、フェノール樹脂系含浸液（昭和高分子（株）製、「ショウノールＢＲＳ−３８９６」４４質量部を含浸させ、平板状に６層積層した。
一方、前記フェノール樹脂系含浸液１５質量部、粉末フェノール樹脂（カシュウー（株）製、「カシュー樹脂Ｎｏ．０５」）２５質量部、炭素短繊維（呉羽化学工業（株）製、クレカチョップＭ−１０７Ｔ）、平均繊維長０．７ｍｍ、Ｌ／Ｄ≒３９）１０質量部、２−フリルメタノール（純正化学（株）製、純正１級）１０質量部、エタノール混合溶液（日本アルコール販売（株）製、「ソルミックスＨ−２３」）４０質量部を均一に混合分散させて接着剤を調製した。
次いで、厚さ０．３８ｍｍの黒鉛シート（東洋炭素（株）製、「パーマホイル」）の被接着面に前記接着剤を４５０ｇ／ｍ2の割合で刷毛で塗布し、この黒鉛シートと炭素繊維フェルトを加圧することなく積層し、１５０℃、圧力０．０１５ＭＰａで１４０分間圧縮成形し、樹脂を硬化させた。片側表面に黒鉛シートが積層され、樹脂を硬化させた炭素繊維フェルトを、更に真空中、温度２０００℃で１時間、黒鉛化処理し、炭素繊維フェルト層の嵩密度が０．１６ｇ／ｃｍ3の平板状断熱材を得た。該平板状断熱材を黒鉛シートが高温側になるように真空炉内に設置し、次いで温度２０００℃までの昇温、降温の熱サイクルを４４回繰り返した。その結果、層の剥がれ、膨れが認められず、真空炉用断熱材として用いることができた。
(Example 1)
100 parts by mass of pitch-based carbon fiber (Kureha Chemical Industries, Ltd., “Klecafert F-110”) and 44 parts by mass of phenol resin-based impregnating liquid (Showa High Polymer Co., Ltd., “Shonol BRS-3896”) 6 layers were laminated in a flat plate shape.
On the other hand, 15 parts by mass of the phenol resin-based impregnating liquid, 25 parts by mass of powdered phenol resin (manufactured by Cashew Co., Ltd., “Cashew Resin No. 05”), short carbon fiber (manufactured by Kureha Chemical Industry Co., Ltd., Kureka Chop M-) 107T), average fiber length 0.7 mm, L / D≈39) 10 parts by mass, 2-furylmethanol (manufactured by Junsei Chemical Co., Ltd., Genuine Grade 1), ethanol mixed solution (Japan Alcohol Sales Co., Ltd.) Manufactured, “Solmix H-23”) 40 parts by mass was uniformly mixed and dispersed to prepare an adhesive.
Next, the adhesive was applied to the adherend surface of a 0.38 mm thick graphite sheet (“Permafoil” manufactured by Toyo Tanso Co., Ltd.) with a brush at a rate of 450 g / m 2. The felt was laminated without applying pressure and compression molded at 150 ° C. and a pressure of 0.015 MPa for 140 minutes to cure the resin. A carbon fiber felt in which a graphite sheet is laminated on one surface and the resin is cured is further graphitized in a vacuum at a temperature of 2000 ° C. for 1 hour, and the bulk density of the carbon fiber felt layer is 0.16 g / cm 3 . A flat heat insulating material was obtained. The flat heat insulating material was placed in a vacuum furnace so that the graphite sheet was on the high temperature side, and then the heat cycle of raising and lowering the temperature to 2000 ° C. was repeated 44 times. As a result, no peeling or swelling of the layer was observed, and it could be used as a heat insulating material for a vacuum furnace.
（比較例１）
実施例１の接着剤の２−フリルメタノールに代えて、メタノールとした接着剤を用いた以外は実施例１と同様にして、炭素繊維フェルト層の嵩密度０．１６ｇ／ｃｍ3の片側表面が黒鉛シートの平板状断熱材を得た。この平板状断熱材を黒鉛シートが高温側になるように真空炉内に設置し、次いで温度２０００℃までの昇温、降温の熱サイクルを１０回繰り返したところ、黒鉛シートが膨れた個所が認められ、一部黒鉛シートが剥離した。
(Comparative Example 1)
The one-side surface of the carbon fiber felt layer having a bulk density of 0.16 g / cm 3 was obtained in the same manner as in Example 1 except that instead of 2-furylmethanol as the adhesive in Example 1, methanol was used. A flat sheet heat insulating material of graphite sheet was obtained. This flat heat insulating material was placed in a vacuum furnace so that the graphite sheet was on the high temperature side, and then the temperature cycle up to 2000 ° C. and the temperature cycle were repeated 10 times. Part of the graphite sheet was peeled off.
（実施例２）
実施例１の厚さ０．３８ｍｍの黒鉛シートに代えて、炭素繊維クロス（呉羽化学工業（株）製、「クレカクロスＰ−２００」）を用いて、この炭素繊維クロスの被接着面に接着剤を７００ｇ／ｍ2の割合で刷毛で塗布した以外は実施例１と同様にして、炭素繊維フェルト層の嵩密度が０．１６ｇ／ｃｍ2であり、片側表面が炭素繊維クロスの平板状断熱材を得た。この平板状断熱材を炭素繊維クロスが高温側になるように真空炉内に設置し、次いで温度２０００℃までの昇温、降温の熱サイクルを４４回繰り返した。その結果、層の剥がれ、膨れが認められず、真空炉用断熱材として用いることができた。
(Example 2)
Instead of the graphite sheet having a thickness of 0.38 mm in Example 1, carbon fiber cloth (Kureha Chemical Industry Co., Ltd., “Kureka Cloth P-200”) was used and adhered to the adherend surface of the carbon fiber cloth. Except that the agent was applied with a brush at a rate of 700 g / m 2 , the bulk density of the carbon fiber felt layer was 0.16 g / cm 2 and the surface on one side was a carbon fiber cloth in the same manner as in Example 1. The material was obtained. This flat heat insulating material was placed in a vacuum furnace so that the carbon fiber cloth was on the high temperature side, and then the temperature cycle up to 2000 ° C. and the temperature cycle of temperature reduction were repeated 44 times. As a result, no peeling or swelling of the layer was observed, and it could be used as a heat insulating material for a vacuum furnace.
（実施例３）
実施例２で用いたものと同じ炭素繊維クロスの一方の面に実施例１と同じ接着剤を７００ｇ／ｍ2の割合で刷毛で塗布した。これを、実施例２の片側表面が炭素繊維クロスの平板状断熱材の炭素繊維クロス面に貼り合わせ、１５０℃、圧力０．０１５ＭＰａで１４０分間圧縮成形し、樹脂を硬化させた。更に真空中、温度２０００℃で１時間黒鉛化処理し、炭素繊維フェルト層の嵩密度０．１６ｇ／ｃｍ3である炭素繊維フェルト／炭素繊維クロス／炭素繊維クロスよりなる三層構造の平板状断熱材を得た。この平板状断熱材を炭素繊維クロスが高温側になるように真空炉内に設置し、次いで温度２０００℃までの昇温、降温の熱サイクルを４４回繰り返した。その結果、層の剥がれ、膨れが認められず、真空炉用断熱材として用いることができた。
(Example 3)
The same adhesive as in Example 1 was applied with a brush at a rate of 700 g / m 2 on one surface of the same carbon fiber cloth used in Example 2. The one side surface of Example 2 was bonded to the carbon fiber cloth surface of the flat heat insulating material of carbon fiber cloth, and compression molded at 150 ° C. and a pressure of 0.015 MPa for 140 minutes to cure the resin. Further, graphitization treatment was performed in a vacuum at a temperature of 2000 ° C. for 1 hour, and a three-layered flat plate heat insulation composed of carbon fiber felt / carbon fiber cloth / carbon fiber cloth having a carbon fiber felt layer bulk density of 0.16 g / cm 3. The material was obtained. This flat heat insulating material was placed in a vacuum furnace so that the carbon fiber cloth was on the high temperature side, and then the temperature cycle up to 2000 ° C. and the temperature cycle of temperature reduction were repeated 44 times. As a result, no peeling or swelling of the layer was observed, and it could be used as a heat insulating material for a vacuum furnace.
（実施例４）
実施例１の黒鉛シートに代えて炭素繊維ペーパー（呉羽化学工業（株）製、「クレカペーパーＥ−２０４」）を用いて、この炭素繊維ペーパーの被接着面に実施例１と同じ接着剤を５００ｇ／ｍ2の割合で刷毛で塗布した以外は実施例１と同様にして、炭素繊維フェルト層の嵩密度が０．１６ｇ／ｃｍ3であり、片側表面が炭素繊維ペーパーの平板状断熱材を得た。この平板状断熱材を炭素繊維ぺ一パーが高温側になるように真空炉内に設置し、次いで温度２０００℃までの昇温、降温の熱サイクルを４４回繰り返した。その結果、層の剥がれ、膨れが認められず、真空炉用断熱材として用いることができた。
Example 4
In place of the graphite sheet of Example 1, carbon fiber paper (“Kureka Paper E-204” manufactured by Kureha Chemical Industry Co., Ltd.) was used, and the same adhesive as in Example 1 was applied to the bonded surface of the carbon fiber paper. Except that it was applied with a brush at a rate of 500 g / m 2 , a flat heat insulating material having a carbon fiber felt layer with a bulk density of 0.16 g / cm 3 and a carbon fiber paper on one side was used. Obtained. This flat heat insulating material was placed in a vacuum furnace so that the carbon fiber paper was on the high temperature side, and then the temperature cycle of temperature increase to 2000 ° C. and temperature decrease were repeated 44 times. As a result, no peeling or swelling of the layer was observed, and it could be used as a heat insulating material for a vacuum furnace.
（実施例５）
実施例１の「ショウノールＢＲＳ−３８９６」の代わりにフェノール樹脂系含浸液（群栄化学（株）製、「レジトップＰＬ−６１０７」）を用いた他は、実施例１と同様に行った。その結果、４４回繰り返して層の剥がれ、膨れが認められず、真空炉用断熱材として用いることができた。
（実施例６）
実施例１で用いた接着剤のフェノール樹脂系含浸液１５質量部、粉末フェノール樹脂２５質量部、炭素短繊維１０質量部、２−フリルメタノール１０質量部の代わりに、それぞれ、５０質量部、２５質量部、９質量部、９質量部とし、エタノール混合溶液４０質量部の代わりに水７質量部として接着剤とした、また、窒素ガス雰囲気中、温度２０００℃で黒鉛化処理した他は実施例１と同様に行った。その結果、４４回繰り返して層の剥がれ、膨れが認められず、真空炉用断熱材として用いることができた。
(Example 5)
The same procedure as in Example 1 was performed, except that a phenol resin impregnating solution (manufactured by Gunei Chemical Co., Ltd., “Resitop PL-6107”) was used instead of “Shonol BRS-3896” in Example 1. . As a result, the layer was not peeled off and swollen 44 times repeatedly, and could be used as a heat insulating material for a vacuum furnace.
(Example 6)
Instead of 15 parts by mass of the phenol resin-based impregnating solution of the adhesive used in Example 1, 25 parts by mass of powdered phenol resin, 10 parts by mass of carbon short fibers, and 10 parts by mass of 2-furylmethanol, 50 parts by mass and 25 parts by mass, respectively. Examples are as follows: mass parts, 9 parts by mass, 9 parts by mass, and 7 parts by mass of water instead of 40 parts by mass of the ethanol mixed solution as an adhesive, and graphitization at a temperature of 2000 ° C. in a nitrogen gas atmosphere. 1 was performed. As a result, the layer was not peeled off and swollen 44 times repeatedly, and could be used as a heat insulating material for a vacuum furnace.
（実施例７）
実施例１で用いたものと同じ黒鉛シートの一方の面に実施例６で用いた接着剤を４５０ｇ／ｍ2の割合で刷毛で塗布した。これを、実施例６で得られた２層構造体の片側表面を構成する黒鉛シート面に貼り合わせ、実施例３と同様にして三層構造体を得、同様に試験した。その結果、４４回繰り返して層の剥がれ、膨れが認められず、真空炉用断熱材として用いることができた。
（実施例８）
実施例６の「ショウノールＢＲＳ−３８９６」の代わりに群栄化学（株）製，「レジトップＰＬ−６１０７」とした他は、実施例６と同様に行った。その結果、４４回繰り返して層の剥がれ、膨れが認められず、真空炉用断熱材として用いることができた。
（実施例９）
実施例１と同様、平板状に６層積層した後、１５０℃、圧力０．０１５ＭＰａで１４０分間圧縮成形し、樹脂を硬化させた。この硬化された炭素繊維フェルトを、更に真空中、温度２０００℃で１時間、黒鉛化処理し、嵩密度が０．１６ｇ／ｃｍ3の平板状炭素繊維フェルトを得た。
また、接着剤として、フラン樹脂（日立化成工業（株）製、「ヒタフラン３０３」）６０質量部、実施例１の「クレカチョップＭ−１０７Ｔ」１６質量部、黒鉛粉末（日本黒鉛工業（株）製、「ＨＡＧ−１５」）１６質量部、実施例１の２−フリルメタノール８質量部を均一に混合分散させた。
次いで、実施例１で用いたものと同じ「パーマホイル」の一方の面に実施例８で用いた接着剤を４５０ｇ／ｍ2の割合でへらで塗布した。この黒鉛シートと上記平板状炭素繊維フェルトを貼り合わせ、１５０℃、圧力０．０１５ＭＰａで１４０分間圧縮成形し、樹脂を硬化させた後、更に真空中、温度２０００℃で１時間、黒鉛化処理し、炭素繊維フェルト層の嵩密度が０．１６ｇ／ｃｍ3の平板状断熱材を得た。これを実施例１と同様に、熱サイクルを行なったところ、４４回繰り返して層の剥がれ、膨れが認められず、真空炉用断熱材として用いることができた。
(Example 7)
The adhesive used in Example 6 was applied to one surface of the same graphite sheet used in Example 1 with a brush at a rate of 450 g / m 2 . This was bonded to the graphite sheet surface constituting one side surface of the two-layer structure obtained in Example 6, and a three-layer structure was obtained in the same manner as in Example 3 and tested in the same manner. As a result, the layer was not peeled off and swollen 44 times repeatedly, and could be used as a heat insulating material for a vacuum furnace.
(Example 8)
The same procedure as in Example 6 was performed except that “Shorenol BRS-3896” in Example 6 was replaced with “Resitop PL-6107” manufactured by Gunei Chemical Co., Ltd. As a result, the layer was not peeled off and swollen 44 times repeatedly, and could be used as a heat insulating material for a vacuum furnace.
Example 9
As in Example 1, after laminating 6 layers in a flat plate shape, compression molding was performed at 150 ° C. and a pressure of 0.015 MPa for 140 minutes to cure the resin. The cured carbon fiber felt was further graphitized in a vacuum at a temperature of 2000 ° C. for 1 hour to obtain a flat carbon fiber felt having a bulk density of 0.16 g / cm 3 .
Further, as an adhesive, 60 parts by mass of furan resin (manufactured by Hitachi Chemical Co., Ltd., “Hitafuran 303”), 16 parts by mass of “Kureka Chop M-107T” of Example 1, graphite powder (Nippon Graphite Industries Co., Ltd.) Manufactured, “HAG-15”) 16 parts by mass and 2-furylmethanol 8 parts by mass of Example 1 were uniformly mixed and dispersed.
Next, the adhesive used in Example 8 was applied with a spatula at a rate of 450 g / m 2 on one side of the same “permoil” used in Example 1. The graphite sheet and the flat carbon fiber felt were bonded together, compression molded at 150 ° C. and pressure of 0.015 MPa for 140 minutes to cure the resin, and then further graphitized in vacuum at a temperature of 2000 ° C. for 1 hour. A flat heat insulating material having a bulk density of the carbon fiber felt layer of 0.16 g / cm 3 was obtained. When this was subjected to a thermal cycle in the same manner as in Example 1, it was repeated 44 times and no layer peeling or swelling was observed, and it could be used as a heat insulating material for a vacuum furnace.
（実施例１０）
実施例９の「パーマホイル」の代わりに実施例２の「クレカクロスＰ−２００」を用い、この炭素繊維クロスの一方の面に７００ｇ／ｍ2の割合で接着剤をへらで塗布した他は、実施例９と同様に行なった。その結果、層の剥がれ、膨れが認められず、真空炉用断熱材として用いることができた。
（実施例１１）
実施例９の「パーマホイル」の代わりに実施例４の「クレカペーパーＥ−２０４」を用い、この炭素繊維ペーパーの一方の面に５００ｇ／ｍ2の割合で接着剤をへらで塗布した他は、実施例９と同様に行なった。その結果、４４回繰り返して層の剥がれ、膨れが認められず、真空炉用断熱材として用いることができた。
(Example 10)
The “Cureka cloth P-200” of Example 2 was used instead of “Permafoil” of Example 9, and an adhesive was applied with a spatula at a rate of 700 g / m 2 on one surface of the carbon fiber cloth. This was carried out in the same manner as in Example 9. As a result, no peeling or swelling of the layer was observed, and it could be used as a heat insulating material for a vacuum furnace.
(Example 11)
In place of “Permafoil” in Example 9, “Kureka Paper E-204” in Example 4 was used, and an adhesive was applied with a spatula at a rate of 500 g / m 2 on one side of the carbon fiber paper. This was carried out in the same manner as in Example 9. As a result, the layer was not peeled off and swollen 44 times repeatedly, and could be used as a heat insulating material for a vacuum furnace.
Claims (23)
（１）炭化率４０％以上の炭素化材、
（２）該炭素化材を溶解する複素環式化合物、及び
（３）炭素短繊維又は該複素環式化合物に不溶な炭素化可能な短繊維からなることを特徴とする断熱材用接着剤。 Adhesive
(1) Carbonized material having a carbonization rate of 40% or more,
(2) A heterocyclic compound that dissolves the carbonized material, and (3) a carbon short fiber or a carbonizable short fiber that is insoluble in the heterocyclic compound.
（１）炭化率４０％以上の炭素化材、
（２）該炭素化材を溶解する複素環式化合物、及び
（３）炭素短繊維又は該複素環式化合物に不溶な炭素化可能な短繊維からなる断熱材用接着剤であることを特徴とする炭素化積層体。 An adhesive is spread on at least one side of the carbonized molded body and laminated with another molded body, and is a carbonized laminated body.
(1) Carbonized material having a carbonization rate of 40% or more,
(2) A heterocyclic compound that dissolves the carbonized material, and (3) an adhesive for a heat insulating material comprising short carbon fibers or short fibers that are insoluble in the heterocyclic compound and can be carbonized. Carbonized laminate.
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| WO2008023777A1 (en) | 2006-08-22 | 2008-02-28 | Kureha Corporation | Laminated molded article containing carbon fiber and method for production thereof |
| JP2010116275A (en) * | 2008-11-11 | 2010-05-27 | Bridgestone Corp | Production method of silicon carbide single crystal |
| WO2011090151A1 (en) * | 2010-01-22 | 2011-07-28 | 株式会社クレハ | Carbon fiber laminated molded product, and method for producing same |
| JP2015174807A (en) * | 2014-03-17 | 2015-10-05 | 大阪ガスケミカル株式会社 | Carbon fiber-based heat insulation material, and manufacturing method of the same |
| CN104974697A (en) * | 2015-07-21 | 2015-10-14 | 中国科学院上海应用物理研究所 | Carbon/carbon composite material binder, bonding method and carbon/carbon composite material member |
| JP2016028880A (en) * | 2014-07-18 | 2016-03-03 | パナソニックＩｐマネジメント株式会社 | Composite sheet and production method of the same, and electronic equipment using composite sheet |
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| CN1328043C (en) * | 2006-03-27 | 2007-07-25 | 匙馨柱 | Production of laminated cloth for installing ceramic ball on radial weaving mesh cloth |
| WO2008023777A1 (en) | 2006-08-22 | 2008-02-28 | Kureha Corporation | Laminated molded article containing carbon fiber and method for production thereof |
| US8962500B2 (en) | 2006-08-22 | 2015-02-24 | Kureha Corporation | Molded article containing stacked carbon fiber and method for producing same |
| JP2010116275A (en) * | 2008-11-11 | 2010-05-27 | Bridgestone Corp | Production method of silicon carbide single crystal |
| WO2011090151A1 (en) * | 2010-01-22 | 2011-07-28 | 株式会社クレハ | Carbon fiber laminated molded product, and method for producing same |
| CN102712168A (en) * | 2010-01-22 | 2012-10-03 | 株式会社吴羽 | Carbon fiber laminated molded product, and method for producing same |
| JP2015174807A (en) * | 2014-03-17 | 2015-10-05 | 大阪ガスケミカル株式会社 | Carbon fiber-based heat insulation material, and manufacturing method of the same |
| JP2016028880A (en) * | 2014-07-18 | 2016-03-03 | パナソニックＩｐマネジメント株式会社 | Composite sheet and production method of the same, and electronic equipment using composite sheet |
| CN104974697A (en) * | 2015-07-21 | 2015-10-14 | 中国科学院上海应用物理研究所 | Carbon/carbon composite material binder, bonding method and carbon/carbon composite material member |
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| JP4582685B2 (en) | 2010-11-17 |
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