JPH0124529B2 - - Google Patents
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- Publication number
- JPH0124529B2 JPH0124529B2 JP56093134A JP9313481A JPH0124529B2 JP H0124529 B2 JPH0124529 B2 JP H0124529B2 JP 56093134 A JP56093134 A JP 56093134A JP 9313481 A JP9313481 A JP 9313481A JP H0124529 B2 JPH0124529 B2 JP H0124529B2
- Authority
- JP
- Japan
- Prior art keywords
- moisture
- thin film
- permeable gas
- porous member
- gas shield
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/12—Composite membranes; Ultra-thin membranes
- B01D69/1213—Laminated layers
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Drying Of Gases (AREA)
Description
本発明は例えば換気装置、空気調和装置等の全
熱交換器の仕切板等に用いられる透湿性気体遮蔽
物に関し、特に透湿性と気体遮蔽性という気体の
選択透過性を高度化すると共に取扱い性、加工性
を容易にした透湿性気体遮蔽物に関する。
近時、冷暖房効果を高めるため住居空間の断熱
化、気密化が進むにつれて換気の必要性が再認識
されてきている。
冷暖房効果を損なわずに換気を行う方法とし
て、排気と給気との間で熱交換する方法が考えら
れている。
この時、顕熱（温度）と共に潜熱（水蒸気の持
つている気化熱）も同様に交換できればその効果
は著しい。この要求に答えるために、本発明者ら
は先に静止式全熱交換器（排気と給気とを仕切板
を介して全熱交換させる。）を発明し、（特公昭47
−19990号）、これに用いる仕切板用部材として透
湿性は大きいが透気性は小さいという透湿性気体
遮蔽物を発明した（特許第888975号）。
上記静止式全熱交換器に用いられる仕切板の特
性としては屋内から屋外に排出する汚れた空気と
屋外から屋内に吸入される新鮮な空気とが混合す
ることなく、しかも湿度交換を行わせるために上
記のように低透気性と高透湿性が要求される。
このような特性を実現するために本発明者らは
紙類、不織布、ガラス紙、アスベスト紙等の繊維
性多孔質部材や多孔性のセラミツクの薄板等に吸
湿剤を含む親水性高分子化合物を含浸又は塗布す
るようにしたものを案出した。
しかしながら、上記の方法により得られる透湿
性気体遮蔽物は透湿性と気体遮蔽性という気体の
選択透過性を高度化するために吸湿剤を含む親水
性高分子化合物の含有率を増大させると含浸又は
塗布された吸湿性の高分子膜がベトつき、その後
の取り扱い及び加工が困難となつた。
そこで、本発明は以上のような従来の実情に鑑
み、透湿性及び気体遮蔽性という気体の選択透過
性を高度化すると同時に取扱い性及び加工性を容
易にする構造をもつた透湿性気体遮蔽物を得供す
るものである。
以下、本発明の実施例を第１図に基づいて説明
する。
本発明に係る透湿性気体遮蔽物は、弱疎水性の
多孔質部材と、該部材の片面に吸湿剤を含む親水
性高分子化合物の水溶液をコーテイングして形成
した緻密な吸湿性薄膜と、該吸湿性薄膜にラミネ
ートした他の多孔質部材と、の三層構造からな
り、第１図における１及び２が多孔質部材、３が
緻密な吸湿性薄膜である。
ここで、上記弱疎水性多孔質部材としては、適
度に親水処理の施された多孔性の高分子膜或いは
サイズ剤を用いて弱疎水化処理の施された紙類が
用いられる。具体的には前者として疎水性のポリ
エチレン、ポリカーボネート、ポリエステル等を
素材とする多孔性の高分子膜（厚さ20〜100μm程
度のフイルム）の表面に親水基を結合させること
により適度に親水性を付与した高分子膜が用いら
れる。後者としては、和紙、紙、洋紙等の紙類
やカーボン繊維、、ガラス繊維等との混抄紙にロ
ジン、膠等の天然サイズ剤、合成サイズ剤を用い
て弱疎水化処理を施した紙類が用いられる。疎水
性の評価法としてはJIS規格Ｐ―8122―54による
サイズ度試験法があるが、適度の親水性あるいは
弱疎水性とはサイズ度で20〜200秒程度を指す。
上記吸湿剤としては一般に乾燥剤として用いら
れているハロゲン化物、酸化物、塩類、水酸化物
を始め、吸湿性物質である多価アルコール類等も
用いることができるが、特に塩化リチウムが適す
る。
上記親水性高分子化合物としては、通常一般の
水溶性高分子樹脂、天然樹脂、あるいはこれらの
混合物例えばポリビニルアルコール樹脂、ポリビ
ニルメチルエーテル樹脂、ポリアクリル酸樹脂、
ポリメタクリル酸樹脂、メチルセルロース等が用
いられるが、特にポリビニルアルコール樹脂が適
する。
上記弱疎水性の多孔質部材の片面に吸湿剤を含
む親水性高分子化合物の緻密な吸湿性の薄膜を形
成させる場合、弱疎水性多孔質部材に対して20〜
100ｇ／m2の塗工量になるようにコーテイングす
ることが好ましい。尚、この塗工量が20ｇ／m2以
下では効果が薄く、100ｇ／m2以上では塗膜が厚
くなる。
上記吸湿剤を含む親水性高分子化合物の緻密な
薄膜は吸湿剤２〜10重量％及び親水性高分子化合
物10〜30重量％の水溶液を調整し、この水溶液を
用いて上記弱疎水性の多孔質部材にコーテイング
することにより形成される。
尚、必要に応じて上記水溶液中に防炎剤等を加
えても良い。
以上のようにして得られた透湿性気体遮蔽物
は、吸湿剤を含む親水性高分子化合物が基体であ
る弱疎水性の多孔質部材の表層に緻密な吸湿性の
薄膜として形成され、さらに緻密な吸湿性の薄膜
を他の多孔質部材でラミネートした三層構造を成
しているため、外観は多孔質部材と変らず、取り
扱い性、加工性は多孔質部材を選択することによ
り最適なものを用いることができる。
又、透湿性と気体遮蔽性という気体の選択透過
性は緻密な吸湿性の薄膜の吸湿率、膜厚を制御す
ることにより高度な性能を実現することができ
る。
具体的には、空気、炭酸ガスのような気体は緻
密な吸湿性の薄膜に遮断されて透過することが困
難であるが、水蒸気は緻密な薄膜が吸湿性を有し
ているため、この薄膜の表面に吸着され、凝集し
て液状水となり、緻密な薄膜中に存在する毛細管
の作用によつて移動し、上記多孔質部材の背面に
達し、この背面から再び気化することによつて容
易に透過することができる。又、前記毛細管を充
満させた液状水はこれらの毛細管を通しての気体
の透過を充分に阻止することができ、高度の気体
の選択性を与えることになる。特に、透湿性は緻
密な薄膜の吸湿率を大きくする程また膜厚を１〜
20μm程度に薄くする程度大きくなり、多孔質部
材でラミネートしているため吸湿率を充分大きく
しても外観状はベトつきやドレインの発生がない
ため取り扱い性、加工性を損うことはない。
このようにして、本発明の方法で得られた透湿
性気体遮蔽物は、例えば換気装置、空調装置の全
熱交換器の仕切板としてそのままあるいは積層し
て用いられ、全熱交換器の場合、屋外から屋内に
取り入れられる新鮮な空気と屋内から屋外に排出
される汚れた空気とが混合されることなく温度及
び湿度の換気を行うことができる。このことによ
り全熱交換器は熱回収率が高いばかりでなく、屋
内の湿度変化を少なくするため、衛生管理上もき
わめて有利である。
又、この透湿性気体遮蔽物は気体分子の透過選
択性を有するので、前記全熱交換器以外の種々の
分野にも広範囲にわたつて利用できるものであ
る。
次に、本発明に係る透湿性気体遮蔽物の製作例
について説明する。
第１の製作例としては、サイズ処理され、サイ
ズ度が40秒の工業用紙を弱疎水性の多孔質部材
として用い、塩化リチウム10重量％、ポリビニル
アルコール20重量％を含む水溶液を調製してコー
テイングマシンを用いて片面にコーテイングし、
水溶液が多孔質部材の内部に浸透する前に乾燥を
行い、緻密で吸湿性の薄膜を形成する。塗工量は
60ｇ／m2、薄膜の厚さは約10μm程度であつた。
これを巻き戻しながら他の工業用紙と加熱圧着
して透湿性気体遮蔽物を得た。
第２の製作例としては、適度に親水処理を施し
サイズ度が80秒程のポリエチレン多孔質シートを
弱疎水性の多孔質部材として用い塩化リチウム10
重量％、ポリビニルアルコール20重量％を含む水
溶液を用いて片面にコーテイング加工を行い、水
溶液が多孔質部材に浸透する前に乾燥を行い、緻
密で吸湿性の薄膜を形成した。
塗工量は40ｇ／m2、薄膜の厚さは約8μm程度で
あつた。
これを巻き戻しながら他のポリエチレン多孔質
シートと加熱圧着して透湿性気体遮蔽物を得た。
ここで、従来の透湿性気体遮蔽物の製作例とし
て、次にあげるものがある。
第１の製作例として、サイズ処理されたサイズ
度40秒の工業用紙を多孔質部材として用い、塩
化リチウム５重量％、ポリビニルアルコール20重
量％を含む水溶液を調製してコーテイングマシン
を用いて片面にコーテイングし、水溶液が多孔質
部材の内部に浸透する前に乾燥を行い、緻密で吸
湿剤の薄膜を形成した。塗工量20ｇ／m2、薄膜の
厚さは約3μm程度であつた。得られた透湿性気体
遮蔽物の断面は第２図に示すようになり、４が緻
密な吸湿性の薄膜、５が多孔質部材である。
この場合に前記塩化リチウム５重量％の濃度を
選んだ理由は10重量％で吸湿性が大きくなり過ぎ
るため表面がベトついて取り扱いや加工が困難に
なるからである。又、塗工量も20ｇ／m2を越える
と同様に取り扱いや加工が困難となる。
第２の製作例として、第１の製作例と同じ多孔
質部材と水溶液を用い、含浸装置を用いて水溶液
を両面に付着させ、水溶液が多孔質部材の内部に
浸透する前に乾燥を行い、緻密で吸湿性の薄膜を
形成した。塗工量は40ｇ／m2、薄膜の厚さは片面
で約3μm程度であつた。得られた透湿性気体遮蔽
物の断面は第３図に示すようになり、６，７が緻
密な吸湿性の薄膜、８が多孔資部材である。
前記本発明に係る透湿性気体遮蔽物の製作例
１，２と従来の透湿性気体遮蔽物の製作例１，２
のそれぞれの透湿性を評価する透湿係数及び気体
遮蔽性を評価する透湿係数（ここでは二酸化炭素
を用いる）を測定した結果を下表に示す。
The present invention relates to a moisture-permeable gas shielding material used, for example, as a partition plate of a total heat exchanger in a ventilation system, an air conditioner, etc., and in particular improves the selective permeability of gases in terms of moisture permeability and gas-shielding property, as well as ease of handling. , relates to a moisture-permeable gas shield that is easy to process. In recent years, as living spaces have become more insulated and airtight to improve heating and cooling effects, the necessity of ventilation has been reaffirmed. A method of exchanging heat between exhaust air and supply air has been considered as a method for ventilation without impairing the cooling and heating effects. At this time, if both sensible heat (temperature) and latent heat (heat of vaporization of water vapor) can be exchanged in the same way, the effect will be significant. In order to meet this demand, the present inventors first invented a static total heat exchanger (exchanges total heat between exhaust air and supply air via a partition plate).
-19990), and invented a moisture-permeable gas shield that has high moisture permeability but low air permeability as a partition plate member used therein (Patent No. 888975). The characteristics of the partition plates used in the above-mentioned static total heat exchanger are that the dirty air discharged from the indoors to the outdoors and the fresh air drawn into the indoors from the outdoors do not mix, and moreover, humidity exchange occurs. As mentioned above, low air permeability and high moisture permeability are required. In order to achieve these characteristics, the present inventors applied a hydrophilic polymer compound containing a moisture absorbent to fibrous porous materials such as paper, nonwoven fabric, glass paper, and asbestos paper, as well as porous ceramic thin plates. He devised a method that could be impregnated or coated. However, the moisture permeable gas shielding material obtained by the above method is impregnated or The applied hygroscopic polymer film became sticky, making subsequent handling and processing difficult. Therefore, in view of the above-mentioned conventional circumstances, the present invention provides a moisture permeable gas shielding material having a structure that improves gas selective permeability in terms of moisture permeability and gas shielding property, and at the same time facilitates handling and processability. This is what we provide. Embodiments of the present invention will be described below with reference to FIG. The moisture permeable gas shield according to the present invention comprises a weakly hydrophobic porous member, a dense hygroscopic thin film formed by coating one side of the member with an aqueous solution of a hydrophilic polymer compound containing a hygroscopic agent, and It has a three-layer structure consisting of a hygroscopic thin film and another porous member laminated thereon. In FIG. 1, 1 and 2 are porous members, and 3 is a dense hygroscopic thin film. Here, as the weakly hydrophobic porous member, a porous polymer membrane that has been appropriately hydrophilized or paper that has been weakly hydrophobically treated using a sizing agent is used. Specifically, the former involves bonding hydrophilic groups to the surface of a porous polymer membrane (a film with a thickness of approximately 20 to 100 μm) made of hydrophobic polyethylene, polycarbonate, polyester, etc., to make it appropriately hydrophilic. A coated polymer film is used. The latter includes papers such as Japanese paper, paper, and Western paper, as well as papers made from paper mixed with carbon fiber, glass fiber, etc., which have been subjected to weak hydrophobic treatment using natural sizing agents such as rosin and glue, or synthetic sizing agents. is used. As a method for evaluating hydrophobicity, there is a sizing test method according to JIS standard P-8122-54, and moderate hydrophilicity or weak hydrophobicity refers to a sizing of about 20 to 200 seconds. As the moisture absorbent, halides, oxides, salts, hydroxides, which are generally used as desiccants, and polyhydric alcohols, which are hygroscopic substances, can be used, but lithium chloride is particularly suitable. The hydrophilic polymer compound is usually a general water-soluble polymer resin, a natural resin, or a mixture thereof such as a polyvinyl alcohol resin, a polyvinyl methyl ether resin, a polyacrylic acid resin,
Although polymethacrylic acid resin, methyl cellulose, etc. are used, polyvinyl alcohol resin is particularly suitable. When forming a dense hygroscopic thin film of a hydrophilic polymer compound containing a hygroscopic agent on one side of the weakly hydrophobic porous member, the
It is preferable to apply the coating to a coating weight of 100 g/m 2 . If the coating amount is less than 20 g/m 2 , the effect will be weak, and if it is more than 100 g/m 2 , the coating will become thick. A dense thin film of the hydrophilic polymer compound containing the moisture absorbent is prepared by preparing an aqueous solution containing 2 to 10% by weight of the moisture absorbent and 10 to 30% by weight of the hydrophilic polymer compound, and using this aqueous solution to form the weakly hydrophobic porous membrane. It is formed by coating a material. Incidentally, a flame retardant or the like may be added to the aqueous solution as necessary. The moisture-permeable gas shield obtained as described above is formed as a dense hygroscopic thin film on the surface layer of a weakly hydrophobic porous material whose base is a hydrophilic polymer compound containing a hygroscopic agent. It has a three-layered structure in which a hygroscopic thin film is laminated with another porous material, so the appearance is the same as a porous material, but the handling and processability are optimized by selecting a porous material. can be used. In addition, high performance in gas selective permeability, ie, moisture permeability and gas barrier properties, can be achieved by controlling the moisture absorption rate and film thickness of a dense hygroscopic thin film. Specifically, gases such as air and carbon dioxide are blocked by a dense hygroscopic thin film, making it difficult for them to pass through, whereas water vapor is difficult to pass through, as a dense thin film has hygroscopic properties. It is adsorbed on the surface of the porous member, aggregates to become liquid water, moves by the action of capillary tubes existing in the dense thin film, reaches the back surface of the porous member, and is easily vaporized again from this back surface. Can be passed through. Also, the liquid water filling the capillaries can sufficiently prevent gas permeation through these capillaries, providing a high degree of gas selectivity. In particular, the moisture permeability increases as the moisture absorption rate of a dense thin film increases.
It becomes large enough to be thinned to about 20 μm, and since it is laminated with a porous material, even if the moisture absorption rate is sufficiently increased, the appearance does not become sticky or drain, so handleability and processability are not impaired. In this way, the moisture-permeable gas shield obtained by the method of the present invention can be used, for example, as a partition plate in a total heat exchanger of a ventilation system or an air conditioner, either as it is or in a stacked manner. To ventilate temperature and humidity without mixing fresh air taken indoors from outdoors and dirty air discharged outdoors from indoors. As a result, the total heat exchanger not only has a high heat recovery rate, but also reduces indoor humidity changes, which is extremely advantageous in terms of hygiene management. Furthermore, since this moisture-permeable gas shield has permeation selectivity for gas molecules, it can be used in a wide variety of fields other than the total heat exchanger. Next, an example of manufacturing a moisture permeable gas shield according to the present invention will be described. The first production example uses sized industrial paper with a sizing degree of 40 seconds as a weakly hydrophobic porous member, and coats it by preparing an aqueous solution containing 10% by weight of lithium chloride and 20% by weight of polyvinyl alcohol. Coating on one side using a machine,
Before the aqueous solution penetrates into the interior of the porous member, it is dried to form a dense, hygroscopic thin film. The coating amount is
The weight was 60 g/m 2 and the thickness of the thin film was about 10 μm.
While unwinding this paper, it was heat-pressed and bonded to other industrial paper to obtain a moisture-permeable gas shield. As a second production example, a polyethylene porous sheet that has undergone appropriate hydrophilic treatment and has a size degree of about 80 seconds is used as a weakly hydrophobic porous member, and lithium chloride 10
One side was coated with an aqueous solution containing 20% by weight of polyvinyl alcohol, and dried before the aqueous solution penetrated into the porous member to form a dense and hygroscopic thin film. The coating amount was 40 g/m 2 and the thickness of the thin film was about 8 μm. While unwinding this sheet, it was heat-pressed and bonded to another porous polyethylene sheet to obtain a moisture-permeable gas shield. Here, the following are examples of manufacturing conventional moisture-permeable gas shields. As the first production example, we used sized industrial paper with a size degree of 40 seconds as a porous member, prepared an aqueous solution containing 5% by weight of lithium chloride and 20% by weight of polyvinyl alcohol, and coated it on one side using a coating machine. The membrane was coated and dried before the aqueous solution penetrated into the interior of the porous member, forming a dense, moisture-absorbing thin film. The coating amount was 20 g/m 2 and the thickness of the thin film was about 3 μm. The cross section of the obtained moisture permeable gas shield is shown in FIG. 2, where 4 is a dense hygroscopic thin film and 5 is a porous member. In this case, the reason why the concentration of 5% by weight of lithium chloride was selected is that at 10% by weight, the hygroscopicity becomes too large and the surface becomes sticky, making handling and processing difficult. Furthermore, if the coating amount exceeds 20 g/m 2 , handling and processing become difficult. As a second production example, the same porous member and aqueous solution as in the first production example are used, the aqueous solution is applied to both sides using an impregnating device, and the aqueous solution is dried before it penetrates into the inside of the porous member. A dense and hygroscopic thin film was formed. The coating weight was 40 g/m 2 , and the thickness of the thin film was about 3 μm on one side. The cross section of the obtained moisture-permeable gas shield is shown in FIG. 3, where 6 and 7 are dense hygroscopic thin films, and 8 is a porous material member. Production Examples 1 and 2 of the moisture-permeable gas shield according to the present invention and Production Examples 1 and 2 of the conventional moisture-permeable gas shield
The table below shows the results of measuring the moisture permeability coefficient for evaluating the moisture permeability and the moisture permeability coefficient (here, carbon dioxide is used) for evaluating the gas shielding property of each of the materials.
【表】
上記の表から明らかなように、本発明の透湿性
気体遮蔽物は従来の透湿性気体遮蔽物と比較して
高透湿、低透気という気体の選択透過性を改善す
ると同時に、取り扱い性、加工性を大巾に改善し
たため工業上のメリツトは非常に大きい。
以上の説明により明らなように本発明に係る透
湿性気体遮蔽物は弱疎水性の多孔質部材の片面に
緻密な吸湿性の薄膜を形成し、さらに他の多孔質
部材で薄膜をラミネートした三層構造をなしてい
るため、取り扱い性及び加工性に優れ、しかも吸
湿率を充分大きくとれるため高透湿、低透気とい
う気体の選択透過性も改善できる効果を有する。[Table] As is clear from the above table, the moisture permeable gas shield of the present invention improves the selective permeability of gases with high moisture permeability and low air permeability compared to conventional moisture permeable gas shields, and at the same time, It has great industrial merits because it has vastly improved handling and processability. As is clear from the above explanation, the moisture-permeable gas shield according to the present invention is formed by forming a dense hygroscopic thin film on one side of a weakly hydrophobic porous member, and further laminating the thin film with another porous member. Because it has a three-layer structure, it has excellent handling and processability, and also has a sufficiently high moisture absorption rate, so it has the effect of improving the selective permeability of gases, with high moisture permeability and low air permeability.
第１図は本発明に係る透湿性気体遮蔽物の断面
図、第２図及び第３図は従来の透湿性気体遮蔽物
の断面図である。
１，２……多孔質部材、３……緻密な吸湿性の
薄膜。
FIG. 1 is a cross-sectional view of a moisture-permeable gas shield according to the present invention, and FIGS. 2 and 3 are cross-sectional views of a conventional moisture-permeable gas shield. 1, 2... Porous member, 3... Dense hygroscopic thin film.
Claims (1)
湿剤を含む親水性高分子化合物の水溶液をコーテ
イングして形成した緻密な吸湿性薄膜と、該吸湿
性薄膜にラミネートした他の多孔質部材と、の三
層構造としたことを特徴とする透湿性気体遮蔽
物。 ２ 弱疎水性の多孔質部材として、適度に親水処
理を施した多孔性の高分子膜を用いてなる特許請
求の範囲第１項記載の透湿性気体遮蔽物。 ３ 弱疎水性の多孔質部材として、サイズ剤を用
いて弱疎水化処理の施された紙類を用いてなる特
許請求の範囲第１項記載の透湿性気体遮蔽物。 ４ 吸湿剤として、塩化リチウムを用いてなる特
許請求の範囲第１項〜第３項のうちいずれか１つ
に記載の透湿性気体遮蔽物。 ５ 親水性高分子化合物として、水溶液のポリビ
ニルアルコールを用いてなる特許請求の範囲第１
項〜第４項のうちいずれか１つに記載の透湿性気
体遮蔽物。[Scope of Claims] 1. A weakly hydrophobic porous member, a dense hygroscopic thin film formed by coating one side of the member with an aqueous solution of a hydrophilic polymer compound containing a hygroscopic agent, and a hygroscopic thin film formed on the hygroscopic thin film. A moisture permeable gas shield characterized by having a three-layer structure including a laminated porous member and another porous member. 2. The moisture-permeable gas shield according to claim 1, which uses a porous polymer membrane that has been appropriately hydrophilized as the weakly hydrophobic porous member. 3. The moisture-permeable gas shield according to claim 1, wherein the weakly hydrophobic porous member is paper that has been subjected to a weakly hydrophobic treatment using a sizing agent. 4. The moisture-permeable gas shield according to any one of claims 1 to 3, which uses lithium chloride as a moisture absorbent. 5 Claim 1 in which polyvinyl alcohol in aqueous solution is used as the hydrophilic polymer compound
The moisture-permeable gas shield according to any one of Items 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56093134A JPS57207528A (en) | 1981-06-17 | 1981-06-17 | Moisture permeable gas shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56093134A JPS57207528A (en) | 1981-06-17 | 1981-06-17 | Moisture permeable gas shield |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57207528A JPS57207528A (en) | 1982-12-20 |
| JPH0124529B2 true JPH0124529B2 (en) | 1989-05-12 |
Family
ID=14074047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56093134A Granted JPS57207528A (en) | 1981-06-17 | 1981-06-17 | Moisture permeable gas shield |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57207528A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58223411A (en) * | 1982-06-21 | 1983-12-26 | Matsushita Electric Ind Co Ltd | Composite film for selective permeation of gas |
| JP4094318B2 (en) * | 2002-03-28 | 2008-06-04 | 松下エコシステムズ株式会社 | Heat exchange membrane and heat exchange element |
| JP2007285598A (en) | 2006-04-17 | 2007-11-01 | Matsushita Electric Ind Co Ltd | Heat exchanger |
| JP5348517B2 (en) * | 2007-05-09 | 2013-11-20 | 住友電工ファインポリマー株式会社 | Separation membrane element and manufacturing method thereof |
| JPWO2010061820A1 (en) * | 2008-11-25 | 2012-04-26 | 旭化成せんい株式会社 | Composite membrane and iontophoresis device including the composite membrane |
| US20140014289A1 (en) * | 2012-07-11 | 2014-01-16 | Kraton Polymers U.S. Llc | Enhanced-efficiency energy recovery ventilation core |
-
1981
- 1981-06-17 JP JP56093134A patent/JPS57207528A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57207528A (en) | 1982-12-20 |
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