JPH0698666B2 - Method for producing porous liquid crystal polymer sheet - Google Patents
Method for producing porous liquid crystal polymer sheetInfo
- Publication number
- JPH0698666B2 JPH0698666B2 JP63061305A JP6130588A JPH0698666B2 JP H0698666 B2 JPH0698666 B2 JP H0698666B2 JP 63061305 A JP63061305 A JP 63061305A JP 6130588 A JP6130588 A JP 6130588A JP H0698666 B2 JPH0698666 B2 JP H0698666B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal polymer
- sheet
- polymer sheet
- solvent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229920000106 Liquid crystal polymer Polymers 0.000 title claims description 46
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 title claims description 45
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000000126 substance Substances 0.000 claims description 21
- 230000035699 permeability Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 9
- 239000011148 porous material Substances 0.000 claims description 7
- -1 polyethylene terephthalate Polymers 0.000 claims description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 6
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 239000004417 polycarbonate Substances 0.000 claims description 5
- 229920000515 polycarbonate Polymers 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 239000004974 Thermotropic liquid crystal Substances 0.000 claims description 2
- 238000000638 solvent extraction Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 11
- 238000001125 extrusion Methods 0.000 description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 5
- 125000003118 aryl group Chemical group 0.000 description 5
- DTQVDTLACAAQTR-UHFFFAOYSA-N Trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F DTQVDTLACAAQTR-UHFFFAOYSA-N 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000008188 pellet Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000000635 electron micrograph Methods 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 239000002649 leather substitute Substances 0.000 description 2
- RLSSMJSEOOYNOY-UHFFFAOYSA-N m-cresol Chemical compound CC1=CC=CC(O)=C1 RLSSMJSEOOYNOY-UHFFFAOYSA-N 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 description 2
- HHVIBTZHLRERCL-UHFFFAOYSA-N sulfonyldimethane Chemical compound CS(C)(=O)=O HHVIBTZHLRERCL-UHFFFAOYSA-N 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 1
- ISPYQTSUDJAMAB-UHFFFAOYSA-N 2-chlorophenol Chemical compound OC1=CC=CC=C1Cl ISPYQTSUDJAMAB-UHFFFAOYSA-N 0.000 description 1
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Natural products C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 1
- 229920003232 aliphatic polyester Polymers 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 238000000886 hydrostatic extrusion Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012994 photoredox catalyst Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- ISXOBTBCNRIIQO-UHFFFAOYSA-N tetrahydrothiophene 1-oxide Chemical compound O=S1CCCC1 ISXOBTBCNRIIQO-UHFFFAOYSA-N 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、新規な多孔性液晶高分子シートの製造方法、
さらに詳しくいえば、本発明は一定方向に配列したフィ
ブリルの集合体から成り、良好な透気性をもつ多孔性液
晶高分子シートの製造方法に関するものである。TECHNICAL FIELD The present invention relates to a method for producing a novel porous liquid crystal polymer sheet,
More specifically, the present invention relates to a method for producing a porous liquid crystal polymer sheet having a good air permeability, which comprises an aggregate of fibrils arranged in a certain direction.
このものは、フィルター、特に高温気体用フィルターや
耐熱性及び耐薬品性フィルター、合成皮革用素材、微細
起泡材、溶媒含浸パッド材などとして有用である。This product is useful as a filter, particularly a filter for high temperature gas, a heat resistance and chemical resistance filter, a material for synthetic leather, a fine foaming material, a solvent impregnated pad material and the like.
従来の技術 これまで液晶ポリマーから成るシートの製造方法として
は、先ず液晶ポリマーを長繊維状に成形し、これを裁断
後粉砕処理して粗パルプを調製し、これを抄造してシー
トとしたのち、カレンダー掛けする方法が知られている
（特開昭60-23960号公報）。2. Description of the Related Art Conventionally, as a method for producing a sheet composed of a liquid crystal polymer, first, a liquid crystal polymer is formed into a long fiber shape, which is chopped and then crushed to prepare a rough pulp. A method of calendaring is known (Japanese Patent Laid-Open No. 60-23960).
しかしながら、この方法は、あらかじめ液晶ポリマーの
長繊維を調製しておく必要があるため、製造工程が多く
なる上に、得られるシートは微細繊維がアトランダムに
絡み合った状態となっているので、透気性が低く、フィ
ルターとして用いる場合用途が制限されるのを免れな
い。さらに、繊維間の接続や接着がよくないので、耐久
性も低いという欠点がある。However, in this method, it is necessary to prepare long fibers of the liquid crystal polymer in advance, so that the number of manufacturing steps is increased and, in addition, since the obtained sheet is in a state in which fine fibers are entangled at random, the transparent sheet is transparent. It has a low temper and is subject to limited applications when used as a filter. Further, since the connection and adhesion between the fibers are not good, the durability is low.
また、熱可塑性液晶ポリマーをペレット化したのち粉砕
して液晶ポリマーのミクロフィブリドを製造し、これを
紙等の原料として用いることも提案されているが（特開
昭63-35816号公報）、この方法もミクロフィブリドの製
造に多くの工程を要する上に、ミクロフィブリドで抄紙
した紙は、当然透気性が低くなり、前記と同様の欠点を
有する。Further, it is also proposed that the thermoplastic liquid crystal polymer is pelletized and then pulverized to produce microfibrids of the liquid crystal polymer, which is used as a raw material for paper or the like (JP-A-63-35816). This method also requires many steps for producing the microfibrids, and the paper made from the microfibrids naturally has low air permeability and has the same drawbacks as described above.
発明が解決しようとする課題 本発明は、前記した公知方法のもつ欠点を克服し、少な
い製造工程で、耐熱性及び耐薬品性に優れ、しかも透気
性の良好な多孔性液晶高分子シートを製造することを目
的としてなされたものである。DISCLOSURE OF THE INVENTION The present invention overcomes the drawbacks of the above-mentioned known methods, and produces a porous liquid crystal polymer sheet having excellent heat resistance and chemical resistance with a small number of production steps and having good air permeability. It was made for the purpose of doing.
課題を解決するための手段 本発明者らは、透気性の良好な多孔性液晶高分子シート
を製造する方法について種々研究を重ねた結果、自己配
向性を有する液晶高分子物質を、非液晶高分子物質と混
合し、シート状に押出成形すると一定方向に配列した液
晶高分子フィブリルが成形されること、及びこれから非
液晶高分子物質を選択的に除去すると、一定方向に配列
した液晶高分子フィブリルのみから成る透気性の良好な
多孔性シートが得られることを見出し、この知見に基づ
いて本発明をなすに至った。Means for Solving the Problems The inventors of the present invention have conducted various studies on a method for producing a porous liquid crystal polymer sheet having good air permeability, and as a result, have found that a liquid crystal polymer substance having self-alignment property is used as a non-liquid crystal polymer. When mixed with a molecular substance and extruded into a sheet shape, liquid crystal polymer fibrils arranged in a certain direction are formed, and when a non-liquid crystal polymer substance is selectively removed therefrom, liquid crystal polymer fibrils arranged in a certain direction. It was found that a porous sheet having good air permeability composed of only the above can be obtained, and the present invention has been completed based on this finding.
すなわち、本発明は、自己配向性を有する液晶高分子物
質と、溶媒に可溶な非液晶高分子物質とを重量比70:30
ないし40:60の範囲で混合したのち、シート状に押出成
形し、次いで成形体から前記非液晶高分子物質を選択的
に溶媒抽出して除くことを特徴とする一定方向に配列し
たフィブリルの集合体から成る多孔性液晶高分子シート
の製造方法を提供するものである。That is, the present invention provides a liquid crystal polymer substance having self-alignment property and a solvent-soluble non-liquid crystal polymer substance in a weight ratio of 70:30.
Or after mixing in the range of 40:60, extruded into a sheet shape, and then selectively solvent-extracting the non-liquid crystal polymer substance from the molded body is removed by solvent extraction, a set of fibrils arranged in a certain direction. A method for producing a porous liquid crystal polymer sheet comprising a body is provided.
本発明方法により得られる多孔性液晶高分子シートは、
隣接フィブリル間に幅５μｍ以下の細長い空隙を有する
平行に配列したフィブリルの集合体から成り、従来の抄
紙法により得られる液晶シートとは全く異なった組織構
造を有する新規な液晶高分子シートである。このもの
は、面積645mm2、厚み0.5mm換算で30秒/100ml以下特に
１〜20秒/100mlという良好な透気度をもっている。The porous liquid crystal polymer sheet obtained by the method of the present invention,
It is a novel liquid crystal polymer sheet which is composed of an assembly of fibrils arranged in parallel and having elongated voids having a width of 5 μm or less between adjacent fibrils and having a completely different texture structure from the liquid crystal sheet obtained by the conventional papermaking method. This product has a good air permeability of 645 mm 2 area and a thickness of 0.5 mm of 30 seconds / 100 ml or less, especially 1 to 20 seconds / 100 ml.
本発明方法において原料として用いる液晶高分子物質
は、自己配向性を有するものであればよく、特に制限は
ないが、サーモトロピック液晶ポリマー、例えば全芳香
族ポリエステル、芳香族−脂肪族ポリエステル、全芳香
族ポリ（エステル−アミド）、芳香族−脂肪族ポリ（エ
ステル−アミド）、芳香族ポリエステル−カーボネート
などが好ましい。The liquid crystal polymer substance used as a raw material in the method of the present invention is not particularly limited as long as it has self-orientation property, but thermotropic liquid crystal polymer, for example, wholly aromatic polyester, aromatic-aliphatic polyester, wholly aromatic. Group poly (ester-amide), aromatic-aliphatic poly (ester-amide), aromatic polyester-carbonate and the like are preferable.
次に本発明方法に用いる非液晶高分子物質は、溶媒に可
溶なものであればよく、特に制限はない。好ましい例と
しては、ポリエチレンテレフタレート、ポリカボネー
ト、ポリスチレン、ポリメチルメタクリレート、アクリ
ロニトリル、スチレン共重合体などを挙げることができ
る。The non-liquid crystal polymer substance used in the method of the present invention is not particularly limited as long as it is soluble in a solvent. Preferable examples include polyethylene terephthalate, polycarbonate, polystyrene, polymethylmethacrylate, acrylonitrile, and styrene copolymer.
本発明方法においては、前記の液晶高分子物質と非液晶
高分子物質とを重量比70:30ないし40:60の範囲で混合し
たものを原料として用いる必要がある。液晶高分子物質
の割合がこれよりも多いと得られる液晶高分子シートの
透気性が劣化するし、またこれよりも少ないと得られる
液晶高分子シート中のファイブリルのネットワークが不
十分となり、安定した構造のシートが得られなくなる。In the method of the present invention, it is necessary to use, as a raw material, a mixture of the liquid crystal polymer substance and the non-liquid crystal polymer substance in a weight ratio of 70:30 to 40:60. If the ratio of the liquid crystal polymer substance is higher than this, the air permeability of the obtained liquid crystal polymer sheet will deteriorate, and if it is less than this, the fibril network in the obtained liquid crystal polymer sheet will be insufficient and stable. A sheet with the specified structure cannot be obtained.
本発明方法においては、この原料混合物を、常法に従
い、シート状に押出成形する。この押出成形は、例え
ば、スクリュー押出、静水圧押出、ラム押出、ロール押
出、ギア押出などによって行うことができる。In the method of the present invention, this raw material mixture is extruded into a sheet according to a conventional method. This extrusion molding can be performed by, for example, screw extrusion, hydrostatic extrusion, ram extrusion, roll extrusion, gear extrusion, or the like.
この押出成形は、液晶高分子物質が液晶状態を維持しう
る条件例えば成形温度で行うことが必要である。This extrusion molding needs to be carried out under the condition that the liquid crystal polymer material can maintain the liquid crystal state, for example, at the molding temperature.
このようにして、通常厚さ0.3〜0.6mm程度のシートに成
形される。次に、このシートから非液晶高分子物質を選
択的に除去する必要があるが、これは、非液晶高分子物
質を溶解するが、液晶高分子物質を溶解しない溶媒によ
って、非液晶高分子物質を抽出除去する。このような溶
媒としては、トリフルオロ酢酸、ニトロベンゼン、フェ
ノール、ｍ−クレゾール、６−クロロフェノール、濃硫
酸、ベンゼン、トルエン、キシレン、四塩化炭素、メチ
ルエチルケトン、アセトン、酢酸エチル、塩化エチレ
ン、ギ酸、ジメチルホルムアミド、ジメチルスルホキシ
ド、ジメチルスルホン、テトラメチルスルホン、テトラ
メチレンスルホキシド、塩化メチレンなどを、使用する
非液晶高分子物質の種類に応じ、適宜選択して用いる。In this way, a sheet having a thickness of 0.3 to 0.6 mm is usually formed. Next, it is necessary to selectively remove the non-liquid crystal polymer substance from the sheet, which is caused by a solvent that dissolves the non-liquid crystal polymer substance but not the liquid crystal polymer substance. Are removed by extraction. Examples of such a solvent include trifluoroacetic acid, nitrobenzene, phenol, m-cresol, 6-chlorophenol, concentrated sulfuric acid, benzene, toluene, xylene, carbon tetrachloride, methyl ethyl ketone, acetone, ethyl acetate, ethylene chloride, formic acid, dimethyl. Formamide, dimethyl sulfoxide, dimethyl sulfone, tetramethyl sulfone, tetramethylene sulfoxide, methylene chloride, etc. are appropriately selected and used according to the type of non-liquid crystal polymer substance used.
添付図面は、本発明方法により得られた多孔性液晶高分
子シートの１例の組織を示す電子顕微鏡写真であって、
この図面から分るように、このシートは、平行に配列し
たフィブリルの集合体から形成され、このフィブリル間
には通常５μｍ以下、好ましは0.3〜５μｍの範囲の細
長い空孔を有している。The accompanying drawings are electron micrographs showing the structure of an example of a porous liquid crystal polymer sheet obtained by the method of the present invention,
As can be seen from this figure, this sheet is formed from an assembly of fibrils arranged in parallel and has elongated pores between the fibrils, usually 5 μm or less, preferably 0.3 to 5 μm. .
このため、この液晶高分子シートは配列方向における強
度が大きく、かつ優れた透気性を示すという特徴を有し
ている。Therefore, this liquid crystal polymer sheet is characterized in that it has high strength in the alignment direction and exhibits excellent air permeability.
発明の効果 本発明によると、一定方向に配列したフィブリルの集合
体から成り、フィブリルの長さ方向に沿って各フィブリ
ル間に細長く形成された空孔を有する新規構造の多孔性
液晶高分子シートを少ない工程で得ることができる。EFFECTS OF THE INVENTION According to the present invention, a porous liquid crystal polymer sheet having a novel structure, which is composed of an aggregate of fibrils arranged in a certain direction and has pores elongated along the length direction of the fibrils, is provided. It can be obtained in a small number of steps.
そして、この多孔性液晶高分子シートは、耐熱性及び耐
薬品性を有する上に、良好な透気性を示すので、例えば
フィルター特に高温気体用フィルター、合成皮革用素
材、微細起泡材、溶媒含浸パッドなどとして好適であ
る。Since this porous liquid crystal polymer sheet has heat resistance and chemical resistance and exhibits good air permeability, for example, a filter, especially a high temperature gas filter, a synthetic leather material, a fine foaming material, a solvent impregnated material. It is suitable as a pad or the like.
実施例 次に実施例によって本発明をさらに詳細に説明する。EXAMPLES Next, the present invention will be described in more detail by way of examples.
実施例１〜４、比較例1,2,3 全芳香族液晶ポリエステル（ベクトラ A950,（株）ポリ
プラスチックス製）のペレットと、ポリエレンテレフタ
レートのペレットとを所定量混合し、90℃で12時間、さ
らに150℃で４時間乾燥したのち、30mm押出機とコート
ハンガーダイを用いて押出温度310℃で押出し、厚さ0.3
〜0.6mmの長尺シートを成形した。このシートを冷却
後、トリフルオロ酢酸に浸漬し、ポリエチレンテレフタ
レートを溶解、抽出した。このようにして得られた固体
シートをエタノール又はアセトンで洗浄乾燥した。得ら
れたシート表面の電子顕微鏡写真を添付図面に示した。
また、このシートの空孔幅、空孔径及び透気度を次表に
示す。Examples 1 to 4, Comparative Examples 1, 2 and 3 Pellets of wholly aromatic liquid crystal polyester (Vectra A950, manufactured by Polyplastics Co., Ltd.) and pellets of polyethylene terephthalate were mixed in a predetermined amount, and the mixture was mixed at 90 ° C. for 12 hours. After further drying for 4 hours at 150 ℃, extrude at a temperature of 310 ℃ with a 30mm extruder and coat hanger die to a thickness of 0.3
A long sheet of ~ 0.6 mm was formed. After cooling this sheet, it was immersed in trifluoroacetic acid to dissolve and extract polyethylene terephthalate. The solid sheet thus obtained was washed with ethanol or acetone and dried. An electron micrograph of the surface of the obtained sheet is shown in the attached drawings.
The pore width, pore diameter and air permeability of this sheet are shown in the following table.
実施例５〜８、比較例4,5,6 全芳香族ポリエステル（ベクトラ A950）のペレットと
ポリカーボネートのペレットとを所定量混合したのち、
実施例１と同様にして得られたシートの空孔幅、空孔径
及び透気度を次表に示す。Examples 5 to 8 and Comparative Examples 4,5 and 6 After mixing pellets of wholly aromatic polyester (Vectra A950) and polycarbonate pellets in a predetermined amount,
The pore width, pore diameter and air permeability of the sheet obtained in the same manner as in Example 1 are shown in the following table.
なお、表中のPETはポリエチレンテレフタレート、PCは
ポリカーボネートの略号である。In the table, PET is an abbreviation for polyethylene terephthalate, and PC is an abbreviation for polycarbonate.
図面は、本発明の１例の液晶高分子シート表面の組織構
造を示す電子顕微鏡写真である。The drawing is an electron micrograph showing the tissue structure of the surface of the liquid crystal polymer sheet of one example of the present invention.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭60−239600（ＪＰ，Ａ) 特開 昭63−35816（ＪＰ，Ａ) ─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A-60-239600 (JP, A) JP-A-63-35816 (JP, A)
Claims (3)
媒に可溶な非液晶高分子物質とを重量比70:30ないし40:
60の範囲で混合したのち、シート状に押出成形し、次い
で成形体から前記非液晶高分子物質を選択的に溶媒抽出
して除くことを特徴とする一定方向に配列したフィブリ
ルの集合体から成る多孔性液晶高分子シートの製造方
法。1. A liquid crystal polymer material having self-orientation and a non-liquid crystal polymer material soluble in a solvent in a weight ratio of 70:30 to 40:
After mixing in the range of 60, it is extruded into a sheet shape, and then the non-liquid crystal polymer substance is selectively solvent-extracted from the molded body to be removed by solvent extraction. A method for producing a porous liquid crystal polymer sheet.
晶ポリエステルを、非液晶高分子物質としてポリエチレ
ンテレフタレート又はポリカーボネートをそれぞれ用い
る請求項１記載の製造方法。2. The production method according to claim 1, wherein thermotropic liquid crystal polyester is used as the liquid crystal polymer substance, and polyethylene terephthalate or polycarbonate is used as the non-liquid crystal polymer substance.
に幅５μｍ以下の細長い空孔を有し、かつ面積645mm2、
厚み0.5mmに換算して30秒/100ml以下の透気度をもつ請
求項１又は２記載の製造方法。3. A porous liquid crystal polymer sheet having elongated pores having a width of 5 μm or less between fibrils and having an area of 645 mm 2 .
The manufacturing method according to claim 1 or 2, which has an air permeability of 30 seconds / 100 ml or less when converted to a thickness of 0.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63061305A JPH0698666B2 (en) | 1988-03-15 | 1988-03-15 | Method for producing porous liquid crystal polymer sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63061305A JPH0698666B2 (en) | 1988-03-15 | 1988-03-15 | Method for producing porous liquid crystal polymer sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01234433A JPH01234433A (en) | 1989-09-19 |
| JPH0698666B2 true JPH0698666B2 (en) | 1994-12-07 |
Family
ID=13167332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63061305A Expired - Lifetime JPH0698666B2 (en) | 1988-03-15 | 1988-03-15 | Method for producing porous liquid crystal polymer sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0698666B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998014507A1 (en) * | 1996-09-30 | 1998-04-09 | Sekisui Chemical Co., Ltd. | Expandable synthetic resin composition, synthetic resin foam, and process for the production of the foam |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE405623T1 (en) * | 1999-10-19 | 2008-09-15 | Rolic Ag | TOPOLOGICALLY STRUCTURED POLYMER COATING |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0633595B2 (en) * | 1984-05-11 | 1994-05-02 | ヘキスト・セラニーズ・コーポレーション | High-performance paper made of fibrils of thermotropic liquid crystal polymer |
| JPS6335816A (en) * | 1986-07-25 | 1988-02-16 | Marubeni Kk | Production of microfibrid of thermoplastic liquid crystal polymer |
-
1988
- 1988-03-15 JP JP63061305A patent/JPH0698666B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998014507A1 (en) * | 1996-09-30 | 1998-04-09 | Sekisui Chemical Co., Ltd. | Expandable synthetic resin composition, synthetic resin foam, and process for the production of the foam |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01234433A (en) | 1989-09-19 |
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