JPS633085A - Production of heat storage construction material - Google Patents
Production of heat storage construction materialInfo
- Publication number
- JPS633085A JPS633085A JP61148829A JP14882986A JPS633085A JP S633085 A JPS633085 A JP S633085A JP 61148829 A JP61148829 A JP 61148829A JP 14882986 A JP14882986 A JP 14882986A JP S633085 A JPS633085 A JP S633085A
- Authority
- JP
- Japan
- Prior art keywords
- heat storage
- latent heat
- base material
- temperature
- storage material
- 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.)
- Pending
Links
- 238000005338 heat storage Methods 0.000 title claims abstract description 72
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000004035 construction material Substances 0.000 title abstract 3
- 239000011232 storage material Substances 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 31
- 239000008188 pellet Substances 0.000 claims abstract description 29
- 239000000126 substance Substances 0.000 claims abstract description 19
- 238000002844 melting Methods 0.000 claims abstract description 13
- 230000008018 melting Effects 0.000 claims abstract description 13
- 238000000465 moulding Methods 0.000 claims abstract description 13
- 239000004698 Polyethylene Substances 0.000 claims abstract description 12
- -1 polyethylene Polymers 0.000 claims abstract description 12
- 229920000573 polyethylene Polymers 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000004566 building material Substances 0.000 claims description 24
- 239000007970 homogeneous dispersion Substances 0.000 abstract 2
- 238000010348 incorporation Methods 0.000 abstract 2
- 230000008961 swelling Effects 0.000 abstract 2
- 239000000155 melt Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 239000002775 capsule Substances 0.000 description 3
- 229920003020 cross-linked polyethylene Polymers 0.000 description 3
- 239000004703 cross-linked polyethylene Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000012188 paraffin wax Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
この発明は、住宅等の１２構造に用いられる蓄熱建材の
製法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method for manufacturing heat storage building materials used in 12 structures such as houses.
住宅における快適性、省エスルギー性を考える場合、太
陽熱をうまく蓄えて必要なときに取り出すようにするＭ
熱の技術は、極めて重要な課題となっている。このため
、昼間室温が高い時にはその熱を蓄え、夜間室温が下が
ると放熱し、しかも、壱の蓄熱量が多い潜熱蓄熱材の使
用が、盛んに検討されている。When considering comfort and energy saving in a home, it is important to store solar heat well and extract it when needed.
Thermal technology has become an extremely important issue. For this reason, the use of latent heat storage materials, which store heat during the day when the room temperature is high and release the heat when the room temperature drops at night, and which have a large amount of heat storage, are being actively studied.
この潜熱蓄熱材の利点としては、 ■ 単位体積あたりの蓄熱量が大きい。The advantages of this latent heat storage material are: ■ Large amount of heat storage per unit volume.
（小型化が図れる。） ■ −定温度の熱の出入りが行える。(It can be made smaller.) ■ - Allows heat to be transferred in and out at a constant temperature.
（潜熱蓄熱材の相転移温度が、冬期の暖房温度より高く
、夏期の冷房温度より低いというものを選択すれば、冬
期は蓄熱による暖房高価があり、夏期は潜熱蓄熱せず、
室内等の冷房の妨げにならない。）
などがある。(If you choose a latent heat storage material whose phase transition temperature is higher than the heating temperature in winter and lower than the cooling temperature in summer, heating will be expensive due to heat storage in the winter, and no latent heat will be stored in the summer.
Does not interfere with cooling indoors, etc. ) and so on.
そこで、ミニカプセル化された潜熱蓄熱材がコンクリー
ト、石膏等の基材に混入分散されて成形された蓄熱建材
が開発されている。潜熱蓄熱材を小さいカプセルとする
ことで、潜熱蓄熱材の表面積を増大させて熱伝導性の改
善を図るとともに、蓄熱建材を施工する際の釘打ち、切
断によるＭ熱特性の劣化を少なくしている。Therefore, heat storage building materials have been developed in which mini-encapsulated latent heat storage materials are mixed and dispersed in a base material such as concrete or plaster. By making the latent heat storage material into small capsules, we can increase the surface area of the latent heat storage material and improve its thermal conductivity, as well as reduce the deterioration of M thermal properties due to nailing and cutting during construction of the heat storage building material. There is.
潜熱蓄熱材としては、過冷却が少なく、かつ、相分離が
なく安定で腐食性のない有機系、つまり、パラフィン系
や油脂系のものが注目をあつめている。ところが、有機
系の潜熱蓄熱材は、融解する際に約２０％もの体積膨張
を起こす。そのため、これらの蓄熱カプセルを基材に分
散させて蓄熱建材を製造した場合、太陽熱等のＮ熱によ
る潜熱蓄熱材の膨張、放出による収縮が周囲の基材に作
用して、前記蓄熱建材に反り、撓みおよびクランクを生
じさせるという問題があった。As latent heat storage materials, organic materials that are stable and non-corrosive, such as paraffin-based and oil-based materials, are attracting attention because of their low supercooling and no phase separation. However, organic latent heat storage materials expand in volume by about 20% when melted. Therefore, when a heat storage building material is manufactured by dispersing these heat storage capsules in a base material, the expansion of the latent heat storage material due to N heat such as solar heat, and the contraction due to release act on the surrounding base material, causing the heat storage building material to warp. , there was a problem of causing deflection and cranking.
ミニカプセル化された潜熱蓄熱材を前記基材に混合して
養生するときは、その雰囲気温度等を潜熱蓄熱材の変態
温度以上とし、前記蓄熱カプセルが最も膨張した状態の
ままで基材を硬化させて蓄熱建材を成形することが前記
問題点を防止するために必要であった。したがって、前
記変態温度にまで基材の温度を上昇させなければならず
、非常に手間がかかり、しかも、コスト高になるという
問題があり、その改善が望まれていた。When the mini-capsulated latent heat storage material is mixed with the base material and cured, the ambient temperature, etc. is set to be higher than the transformation temperature of the latent heat storage material, and the base material is cured while the heat storage capsules remain in the most expanded state. In order to prevent the above-mentioned problems, it was necessary to mold the heat storage building material in such a manner. Therefore, it is necessary to raise the temperature of the base material to the above-mentioned transformation temperature, which is very time-consuming and increases the cost.Therefore, there has been a desire to improve this problem.
この発明は、上記事情に鑑みて、基材に混入分散される
潜熱蓄熱材の変態温度よりも低い温度の下で養生、硬化
が行われても、前記潜熱蓄熱材の体膨張によって生ずる
内部からの圧力によって破壊されることがなく、しかも
、低コストとなる蓄熱建材の製法を提供することを目的
としている。In view of the above circumstances, the present invention provides that even if curing and curing are performed at a temperature lower than the transformation temperature of the latent heat storage material mixed and dispersed in the base material, the latent heat storage material that is mixed and dispersed in the base material retains heat from the inside caused by the body expansion of the latent heat storage material. The purpose of the present invention is to provide a method for producing heat storage building materials that will not be destroyed by the pressure of water and that will be inexpensive.
上記目的を達成するため、この発明は、有機系潜熱蓄熱
材を基材中に混合分散させて、成形する蓄熱建材の製法
であって、前記潜熱蓄熱材と、この潜熱蓄熱材に対して
は相溶性を有するが水に対しては不溶性の物質とを含ま
せて膨潤させたポリエチレンペレットを前記基材中に混
合分散させるとともに、潜熱蓄熱材として成形温度より
も高い温度域に融点を持つものを用い、前記物質として
成形温度よりも低い温度域に融点を持つものを用いるこ
とを特徴とする蓄熱建材の製法をその要旨としている。In order to achieve the above object, the present invention provides a method for producing a heat storage building material by mixing and dispersing an organic latent heat storage material in a base material and forming the mixture, the method comprising: Polyethylene pellets swollen with a compatible but water-insoluble substance are mixed and dispersed in the base material, and have a melting point in a temperature range higher than the molding temperature as a latent heat storage material. The gist of this invention is a method for producing a heat storage building material, characterized in that the substance has a melting point in a temperature range lower than the molding temperature.
以下に、この発明を、その実施例をあられす図面を参照
しながら詳しく説明する。Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
第１図は、この発明にかかる製法によって製造された蓄
熱建材１の厚み方向の断面をあられす。FIG. 1 shows a cross section in the thickness direction of a heat storage building material 1 manufactured by the manufacturing method according to the present invention.
図にみるように、このＭ熱性材１は、パラフィン系およ
び油脂系からなる群より選ばれた有機系潜熱蓄熱材と、
水に対しては不溶性を有するとともに前記潜熱蓄熱材に
対しては相溶性を有する物質（たとえば、パラフィン、
または、油脂など）を含んで膨潤したポリエチレンペレ
ット（以下、「Ｎ熱ペレット」と記す）２が水硬性物質
（たとえば、セメント、石膏など）からなる基材３中に
混合分散されてのち、成形されてなっている。As shown in the figure, the M thermal material 1 includes an organic latent heat storage material selected from the group consisting of paraffin type and oil type;
Substances that are insoluble in water and compatible with the latent heat storage material (for example, paraffin,
Alternatively, polyethylene pellets (hereinafter referred to as "N-heat pellets") 2 swollen by containing fats and oils are mixed and dispersed in a base material 3 made of a hydraulic substance (for example, cement, gypsum, etc.), and then molded. It has been done.
Ｍ熱ベレット２は、つぎのようにして作られる第２図に
みるように、前記有機系潜熱蓄熱材と前記物質が融解混
合されてなる融解液５が溜められている容器４の前記融
解液５中に、多数のポリエチレンペレット６・・・を入
れる。この場合、有機系潜熱蓄熱材としては、蓄熱建材
１の成形温度よりも高い温度域に融点を有するものが使
用され、前記物質としては、前記成形温度よりも低い温
度域に融点を有するものが用いられる。蓄熱建材１の成
形温度に応じて種々の潜熱蓄熱材および前記物質が選ば
れる。前記容器４の下部には電気ヒータ（加熱装置）７
が備えられていて電源８が印加されることによって発熱
し、容器４内の融解液５を加熱するようになっている。The M thermal pellet 2 is made as follows, as shown in FIG. A large number of polyethylene pellets 6 are placed in the container 5. In this case, the organic latent heat storage material used has a melting point in a temperature range higher than the molding temperature of the heat storage building material 1, and the substance has a melting point in a temperature range lower than the molding temperature. used. Various latent heat storage materials and substances are selected depending on the molding temperature of the heat storage building material 1. An electric heater (heating device) 7 is installed at the bottom of the container 4.
is provided, and when a power source 8 is applied, it generates heat and heats the melt 5 in the container 4.
融解液５の加熱温度は、前記ポリエチレンペレット６の
軟化点以上の温度に調整されている。このような加熱温
度であると、ポリエチレンペレット６・・・は、前記融
解液５を吸収して膨潤し溶解する。このポリエチレン溶
解液を押出し機等で成形し、融解液５を膨潤している状
態で再びペレット化して、蓄熱ペレット２を得る。前記
ポリエチレンペレット６の代わりに架橋ポリエチレンペ
レットを用いて融解液５を含浸させて膨潤させると、Ｍ
熱性材１を製造する上で、工程数を減少させることがで
き、低コスト化にも好ましい。すなわち、架橋ポリエチ
レンペレットは、融解液５を含浸膨潤させても熔解する
ことがなく、しかも、隣合う他の架橋ポリエチレンペレ
ットにも溶着しない。したがって、上記のような押出し
成形を行わなくても、そのまま、前記基材３に混合分散
できるため、手間がかからないという利点がある。The heating temperature of the melt 5 is adjusted to a temperature equal to or higher than the softening point of the polyethylene pellets 6. At such a heating temperature, the polyethylene pellets 6 absorb the melt 5, swell, and dissolve. This polyethylene solution is molded using an extruder or the like, and the melt 5 is pelletized again in a swollen state to obtain heat storage pellets 2. When crosslinked polyethylene pellets are used instead of the polyethylene pellets 6 and swollen by impregnating them with the melt 5, M
In manufacturing the thermal material 1, the number of steps can be reduced, which is also preferable for cost reduction. That is, the crosslinked polyethylene pellets do not melt even when impregnated with the melt 5 and swell, and do not weld to other adjacent crosslinked polyethylene pellets. Therefore, it can be mixed and dispersed in the base material 3 as it is without performing extrusion molding as described above, so there is an advantage that it does not take much time and effort.
上記蓄熱ペレット２を基材３に混合分散し、成形してＭ
熱建材１を得るのであるが、基材３の成形温度では、Ｍ
熱ペレット２に含まれている前記有機系潜熱蓄熱材は、
上記のように、その融点の高さから固体であり、前記物
質は、成形温度よりも低い温度域に融点を有しているた
め液体となっている。このようなＭ熱ペレット２が、水
分を十分に有していて軟らかい状態である基材３中に混
入されて分散されているのである。蓄熱ペレット２は、
完全なシール性を有していないため、前記液状物質は、
蓄熱ペレット２外周面から染み出ようとする。しかしな
がら、上記のように、基材３が多量の水を含んでいると
、水に対して不溶性を有する前記液状物質は、水と反発
してＭ熱ベレント２内に含まれたままの状態２にあるか
、または、蓄熱ペレット２外周に少しばかり滞るだけで
、 ・基材３内に分散することがない。基材３が乾燥
し、硬化してくると、前記物質は、ある平衡状態になる
まで徐々に基材３に吸収されて分散される。The heat storage pellets 2 are mixed and dispersed in the base material 3 and molded into M
The thermal building material 1 is obtained, but at the molding temperature of the base material 3, M
The organic latent heat storage material contained in the thermal pellets 2 is
As mentioned above, the substance is solid because of its high melting point, and the substance is liquid because it has a melting point in a temperature range lower than the molding temperature. Such M thermal pellets 2 are mixed and dispersed in the base material 3 which has sufficient moisture and is in a soft state. The heat storage pellet 2 is
Since the liquid substance does not have perfect sealing properties,
It tries to seep out from the outer peripheral surface of the heat storage pellet 2. However, as mentioned above, if the base material 3 contains a large amount of water, the liquid substance that is insoluble in water will repel the water and remain contained in the M heat beam 2. Or, if the heat storage pellets 2 are only slightly stagnant on the outer periphery of the heat storage pellets 2, they will not be dispersed within the base material 3. As the substrate 3 dries and hardens, the substance is gradually absorbed and dispersed in the substrate 3 until a certain equilibrium state is reached.
このことによって、前記Ｍ熱ペレット２の体積は、前記
物質が含まれていた当初の体積に比べて減少する。つま
り、蓄熱ペレット２を収縮させて、基材３との間に空隙
を形成させるのである。このようにすれば、Ｍ熱建材１
が太陽熱等によって熱せられ、蓄熱ペレット２がその熱
によって膨張しても、その体積変化は、前記空隙に吸収
されることとなる。蓄熱ペレット２がその周囲の基材３
を内側から押して蓄熱建材１内に応力を生じさせ、この
ことによって、この蓄熱建材１に反り、撓みおよびクラ
ンクを発生させるという問題が解消される。潜熱蓄熱材
の温度がその融点以上にまで上昇したとしても、その体
積変化は、やはり、前記空隙に吸収されるため、蓄熱建
材１が破壊されるようなことがない。As a result, the volume of the M heat pellet 2 is reduced compared to the original volume containing the substance. In other words, the heat storage pellet 2 is contracted to form a gap with the base material 3. In this way, M thermal building material 1
Even if the heat storage pellet 2 is heated by solar heat or the like and expands due to the heat, the change in volume will be absorbed by the voids. Thermal storage pellet 2 is surrounded by a base material 3
is pushed from the inside to generate stress within the heat storage building material 1, thereby solving the problem of warping, bending, and cranking of the heat storage building material 1. Even if the temperature of the latent heat storage material rises to above its melting point, the change in volume will still be absorbed by the voids, so the heat storage building material 1 will not be destroyed.
以上にみてきたように、この発明にかかるＮ熱建材の製
法は、有機系潜熱蓄熱材を基材中に混合分散させて、成
形する蓄熱建材の製法であって、前記潜熱蓄熱材と、こ
の潜熱蓄熱材に対しては相溶性を有するが水に対しては
不溶性の物質とを含ませて膨潤させたポリエチレンペレ
ットを前記基材中に混合分散させるとともに、潜熱蓄熱
材として成形温度よりも高い温度域に融点を持つものを
用い、前記物質として成形温度よりも低い温度域に融点
を持つものを用いるので、基材に混入分散される潜熱蓄
熱材の変態温度よりも低い温度の下で養生、硬化が行わ
れても、前記潜熱蓄熱材の体膨張によって生ずる内部か
らの圧力によって破壊されることがなく、しかも、低コ
ストとなる。As described above, the method for producing N-heat building materials according to the present invention is a method for producing heat storage building materials in which an organic latent heat storage material is mixed and dispersed in a base material and then molded. Swollen polyethylene pellets impregnated with a substance that is compatible with the latent heat storage material but insoluble in water are mixed and dispersed in the base material, and the temperature is higher than the molding temperature as the latent heat storage material. A substance with a melting point in a temperature range is used, and since a substance with a melting point in a temperature range lower than the molding temperature is used as the substance, it is cured at a temperature lower than the transformation temperature of the latent heat storage material mixed and dispersed in the base material. Even if the latent heat storage material is cured, it will not be destroyed by internal pressure caused by the body expansion of the latent heat storage material, and the cost will be low.
第１図はこの発明にかかる蓄熱建材の製法の１実施例に
よって製造された蓄熱建材の厚み方向断面図、第２図は
前記実施例の１工程を説明する模式図である。
１・・・蓄熱建材 ２・・・蓄熱ペレット ３・・・基
材５・・・融解液 ６・・・ポリエチレンペレット代理
人 弁理士 松 本 武 彦
第２図
手習靜甫正書（自発）
昭和６１年 ８月２０日
特許庁長官 殿 ５．・
、１、 コＩ！（牛の耘
゛ビ′、：二６６ １）存哩午
１ｔＪｔｉｌ ４８８２９号３、補正をする者
羽生との関係 特許出願人
住 所 大阪府門真市大字門真１０４８ｉ
地名 称（５８３）松下電工株式会社
代表者 （す輯役藤井貞夫
４６代理人
氏 名 （７３４６）弁理士 松 本 武
彦５、補正により増加する発明の数
な し
６、補正の対象 ５Ｈ＋駈のとおり６、補正
の対象
明細書
７、補正の内容
（１）明細書第２頁第１３行に［高価」とあるを、「効
果」と訂正する。
（２）明細書第３頁第５行に「腐食性のない」とあるを
、「腐食性の少ない」と訂正する。FIG. 1 is a cross-sectional view in the thickness direction of a heat storage building material manufactured by one embodiment of the method for manufacturing a heat storage building material according to the present invention, and FIG. 2 is a schematic diagram illustrating one step of the above embodiment. 1...Heat storage building material 2...Heat storage pellets 3...Base material 5...Melting liquid 6...Polyethylene pellet agent Patent attorney Takehiko Matsumoto Figure 2 Handwritten by Jingfu (self-proposal) 1988 August 20th, 2016 Dear Commissioner of the Patent Office 5.・
,1, KoI! (Cow's field
゛bi', :266 1) Zonkyo 1t Jtil 48829 No. 3, Relationship with the person making the amendment Hanyu Patent applicant address 1048i Oaza Kadoma, Kadoma City, Osaka Prefecture
Place name Title (583) Representative of Matsushita Electric Works Co., Ltd. (46) Representative Sadao Fujii Name (7346) Patent attorney Takeshi Matsumoto
Hiko 5. The number of inventions will not increase due to the amendment. 6. The subject of the amendment. 5H + As per the above. 6. The specification subject to the amendment. 7. Contents of the amendment (1) "Expensive" is written on page 2, line 13 of the specification. be corrected to "effect". (2) In the 3rd page, line 5 of the specification, the phrase "not corrosive" should be corrected to "less corrosive."
Claims (1)
形する蓄熱建材の製法であって、前記潜熱蓄熱材と、こ
の潜熱蓄熱材に対しては相溶性を有するが水に対しては
不溶性の物質とを含ませて膨潤させたポリエチレンペレ
ットを前記基材中に混合分散させるとともに、潜熱蓄熱
材として成形温度よりも高い温度域に融点を持つものを
用い、前記物質として成形温度よりも低い温度域に融点
を持つものを用いることを特徴とする蓄熱建材の製法。(1) A method for producing a heat storage building material in which an organic latent heat storage material is mixed and dispersed in a base material and molded, the latent heat storage material being compatible with the latent heat storage material, but resistant to water. In this case, swollen polyethylene pellets containing an insoluble substance are mixed and dispersed in the base material, and a latent heat storage material having a melting point in a temperature range higher than the molding temperature is used as the latent heat storage material. A method for producing a heat storage building material characterized by using a material that has a melting point in a lower temperature range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61148829A JPS633085A (en) | 1986-06-24 | 1986-06-24 | Production of heat storage construction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61148829A JPS633085A (en) | 1986-06-24 | 1986-06-24 | Production of heat storage construction material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS633085A true JPS633085A (en) | 1988-01-08 |
Family
ID=15461657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61148829A Pending JPS633085A (en) | 1986-06-24 | 1986-06-24 | Production of heat storage construction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS633085A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03170699A (en) * | 1989-10-23 | 1991-07-24 | Eltech Syst Corp | Electroplating bath anode |
-
1986
- 1986-06-24 JP JP61148829A patent/JPS633085A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03170699A (en) * | 1989-10-23 | 1991-07-24 | Eltech Syst Corp | Electroplating bath anode |
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