JPH0425320Y2 - - Google Patents
Info
- Publication number
- JPH0425320Y2 JPH0425320Y2 JP734787U JP734787U JPH0425320Y2 JP H0425320 Y2 JPH0425320 Y2 JP H0425320Y2 JP 734787 U JP734787 U JP 734787U JP 734787 U JP734787 U JP 734787U JP H0425320 Y2 JPH0425320 Y2 JP H0425320Y2
- Authority
- JP
- Japan
- Prior art keywords
- hydrogel
- laminate
- hydrogel layer
- nonwoven fabric
- outer layers
- 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
Links
- 239000000017 hydrogel Substances 0.000 claims description 39
- 239000004745 nonwoven fabric Substances 0.000 claims description 19
- 239000005871 repellent Substances 0.000 claims description 7
- 229920001296 polysiloxane Polymers 0.000 claims description 6
- 229920000728 polyester Polymers 0.000 claims description 4
- 229920000297 Rayon Polymers 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 239000002964 rayon Substances 0.000 claims description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 2
- 239000004952 Polyamide Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- 229910052731 fluorine Inorganic materials 0.000 claims description 2
- 239000011737 fluorine Substances 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 27
- 239000000499 gel Substances 0.000 description 12
- 239000007788 liquid Substances 0.000 description 7
- 239000002131 composite material Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229920006267 polyester film Polymers 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 239000003937 drug carrier Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000002940 repellent Effects 0.000 description 2
- 239000004447 silicone coating Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- LTHJXDSHSVNJKG-UHFFFAOYSA-N 2-[2-[2-[2-(2-methylprop-2-enoyloxy)ethoxy]ethoxy]ethoxy]ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOCCOCCOCCOC(=O)C(C)=C LTHJXDSHSVNJKG-UHFFFAOYSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000012258 stirred mixture Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Medicinal Preparation (AREA)
- Laminated Bodies (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
この考案は含水ゲル層を有する積層体に関す
る。詳しくは、医療用の電極あるいは薬剤担持体
として使用可能な含水ゲル層を有し、しかも取扱
いが容易な積層体に関する。[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a laminate having a hydrogel layer. Specifically, the present invention relates to a laminate that has a hydrogel layer that can be used as a medical electrode or drug carrier, and that is easy to handle.
（従来の技術）
含水ゲルを臨床医学用電極、臨床医学用導電性
接着剤あるいは薬剤担持体として使用することは
知られており、その使用例も多い。このような目
的に含水ゲルを使用する場合、含水ゲルを用いた
製品はそれ自体の剛性が小さいため、しばしば保
持し難いあるいは破損し易い等の欠点が指摘され
る。このような欠点を解消するため含水ゲル製品
の内部にトリコツト等を封入して補強することが
行われている。また、含水ゲル製品を使用の時点
迄良好な状態で保存しておくためポリエステルな
どのフイルムで挟んで保持することも知られてい
る。(Prior Art) It is known that a hydrogel is used as an electrode for clinical medicine, a conductive adhesive for clinical medicine, or a drug carrier, and there are many examples of its use. When hydrogels are used for such purposes, products using hydrogels themselves have low rigidity, so it is often pointed out that they are difficult to hold or easily break. In order to eliminate such drawbacks, it has been carried out to strengthen the hydrogel product by enclosing tricots or the like inside it. It is also known to sandwich and hold hydrogel products between polyester films or the like in order to preserve them in good condition until use.
しかし、多様な使用目的に合致した構造、形
状、大きさを有している含水ゲル製品を得ること
は必ずしも容易ではない。一例を挙げれば、補強
用トリコツトを含水ゲル製品の中心部に封入する
場合がある。含水ゲル製品は、通常２〜３mmの厚
さを有しており、所望組成の単量体を含む混合物
を重合して得られるが、このような薄い層の中央
に補強剤を封入することは必ずしも容易ではな
い。また、このような含水ゲル製品の多くは人の
皮膚に接触する用途に用いられるので、封入され
た補強材の一部が露出すれば、使用に際して不快
感を与えるので好ましくない。 However, it is not always easy to obtain hydrogel products having structures, shapes, and sizes that meet various purposes of use. For example, reinforcing tricots may be encapsulated in the center of a hydrogel product. Hydrogel products usually have a thickness of 2 to 3 mm and are obtained by polymerizing a mixture containing monomers of the desired composition, but it is not possible to encapsulate a reinforcing agent in the center of such a thin layer. It's not always easy. Furthermore, since many of these hydrogel products are used for purposes in which they come into contact with human skin, it is undesirable if a portion of the encapsulated reinforcing material is exposed, as this may cause discomfort during use.
このような含水ゲル製品を経済的に得るため、
一旦保護シートの付いた大判の含水ゲル体を得た
上で、これを所望の製品の大きさに裁断して含水
ゲル製品を得る方法もあるが、含水ゲルと保護シ
ートの物性は大きな差があり、しばしば含水ゲル
に担当されている成分が裁断機の刃物を汚損する
ので、一定の切れ味を接続するのは困難であり、
商業的生産の隘路となつている。 In order to obtain such hydrogel products economically,
There is a method to obtain a hydrogel product by first obtaining a large hydrogel with a protective sheet and then cutting it into the desired product size, but there is a big difference in the physical properties of the hydrogel and the protective sheet. However, it is difficult to achieve a consistent sharpness because the ingredients contained in the hydrogel often stain the cutting machine blade.
It has become a bottleneck for commercial production.
（考案が解決しようとする問題点）
従つて、この考案の目的は保存性、取扱い性に
優れた含水ゲル製品の積層体を提供することであ
り、さらには効率よく生産し得る構造を有する含
水ゲル製品の積層体を提供することにある。(Problems to be solved by the invention) Therefore, the purpose of this invention is to provide a laminate of hydrogel products with excellent storage stability and handling properties, and furthermore, to provide a laminate of hydrogel products with a structure that allows for efficient production. The purpose of the present invention is to provide a laminate of gel products.
（問題点を解決するための手段）
即ち、この考案は撥水性のフイルムまたは紙よ
りなる外層１および１′とそれらの間に位置し、
不織布により内部補強された含水ゲル層２より構
成され、且つ前記の１および１′は含水ゲル層２
の全周にわたり含水ゲル層２と接触していない部
分３を有していることを特徴とする積層体であ
る。(Means for solving the problem) That is, this invention has outer layers 1 and 1' made of water-repellent film or paper, and is located between them,
It is composed of a hydrous gel layer 2 internally reinforced with a nonwoven fabric, and the above 1 and 1' are the hydrogel layer 2.
This laminate is characterized in that it has a portion 3 that is not in contact with the hydrogel layer 2 over the entire circumference.
（作用）
この考案で用いる撥水性のフイルムまたは紙よ
りなる外層１および１′は含水ゲル層２の保護層
であるとともに支持層でもある。外層１および
１′は撥水性であることが必要である。この事は
含水ゲル層２を安定に保存する上に重要であり、
さらに外層１および１′が撥水性であることは本
考案の積層体を製造する上に有利に作用する。こ
のような撥水性のフイルムまたは紙としてはそれ
自体撥水性であれば特に制限はないがこの中で好
ましく用いられるものは含フツ素樹脂、シリコン
処理されたポリエステルなどの合成樹脂製フイル
ムまたはシリコンコーテイング紙である。これら
は含水ゲル層２の保存性、使用に当つての取扱性
に優れている。このようなフイルムは必ずしも同
種のものを用いる必要はなく、積層体の使用目的
に応じて、その種類、厚さを選ぶことができる。(Function) The outer layers 1 and 1' made of water-repellent film or paper used in this invention are not only protective layers for the hydrogel layer 2 but also support layers. It is necessary that the outer layers 1 and 1' be water repellent. This is important for stably preserving the hydrogel layer 2.
Furthermore, the fact that the outer layers 1 and 1' are water repellent is advantageous in producing the laminate of the present invention. There is no particular restriction on the water-repellent film or paper as long as it is water-repellent in itself, but preferred examples include films made of fluorine-containing resins, synthetic resins such as silicone-treated polyester, or silicone coatings. It's paper. These have excellent storage stability of the hydrogel layer 2 and ease of handling during use. Such films do not necessarily have to be of the same type, and the type and thickness can be selected depending on the intended use of the laminate.
この考案で用いる含水ゲル層２とは含水ゲルで
あれば特に制限はないが、この考案の積層体は臨
床医学用電極、臨床医学用導電性接着剤または外
用薬剤担持体用の含水ゲルの保存、取扱いおよび
製造に特に適している。 The hydrous gel layer 2 used in this invention is not particularly limited as long as it is a hydrous gel, but the laminate of this invention is used to store hydrogels for clinical medical electrodes, clinical medical conductive adhesives, or external drug carriers. , especially suitable for handling and manufacturing.
この考案で用いる含水ゲル層２は親水性の不織
布で内部補強されている必要があり、このとは含
水ゲル層の保形性の確保と製造に際して有利であ
る。不織布の材質に制限はないが、含水ゲル前躯
体が容易に不織布を濡らして浸透して良好な形状
となるためにレーヨン、ポリビニルアルコール、
ポリエステル、ポリアミドまたはポリプロピレン
が好ましい。これら不織布は目付10〜40g／m2で
あることが好ましく、目的が10g／m2に満たない
ときは内部補強の効果に乏しく目付が40g／m2を
超える場合は含水ゲル層がそれ自体に要求される
特性即ち導電性、信号伝導性あるいは薬剤担持量
が十分でなくなるために好ましくない。 The hydrous gel layer 2 used in this invention must be internally reinforced with a hydrophilic nonwoven fabric, which is advantageous in ensuring the shape retention of the hydrogel layer and in manufacturing. There are no restrictions on the material of the nonwoven fabric, but rayon, polyvinyl alcohol,
Preference is given to polyester, polyamide or polypropylene. These nonwoven fabrics preferably have a basis weight of 10 to 40 g/m 2 . If the purpose is less than 10 g/m 2 , the internal reinforcement effect will be poor, and if the area weight exceeds 40 g/m 2 , the hydrous gel layer will not work on itself. This is not preferable because the required properties, ie, electrical conductivity, signal conductivity, or amount of drug supported, are not sufficient.
含水ゲル層２と外層１および１′との接触面積
は実施的に一致していてもよく、また相異つてい
てもよい。この事は第２式において２と１との接
触面積をＡとし、２と1′との接触面積Ｂとすると
き
Ａ≠Ｂ（この場合はＡ＜Ｂ）
であることを意味する。そしてこのことは外層１
または１′を含水ゲル層２から剥離するとき或る
面選択的に先に露出することができるので、使用
に当つて有利である。 The contact areas between the hydrogel layer 2 and the outer layers 1 and 1' may be substantially the same or may be different. This means that in the second equation, when the contact area between 2 and 1 is A, and the contact area between 2 and 1' is B, A≠B (in this case, A<B). And this means that outer layer 1
Alternatively, when 1' is peeled off from the hydrogel layer 2, a certain surface can be selectively exposed first, which is advantageous in use.
この考案の積層体は外層１および１′が含水ゲ
ル層２の全周にわたり含水ゲル層２と接触してい
ない部分３を有している必要がある。前記の部分
３は使用に当つて含水ゲル層２から外層１および
１′を剥離するのに好適な手懸りとなるとともに、
本考案の積層体を商業的に生産する場合裁断を効
率的に行うことができるので有利である。 In the laminate of this invention, the outer layers 1 and 1' must have a portion 3 that is not in contact with the hydrogel layer 2 over the entire circumference of the hydrogel layer 2. The portion 3 serves as a suitable grip for peeling off the outer layers 1 and 1' from the hydrogel layer 2 during use, and
When commercially producing the laminate of the present invention, it is advantageous because cutting can be carried out efficiently.
（実施例）
テトラエチレングリコール−ビス−メタクリレ
ート0.1gおよびベンジルメチル−ケタール0.1gを
アクリル酸25g中に溶解し、さらにこの溶液を
50gのグリセリン中に添加した。この混合物を攪
拌しながら7gのKOHを10mlの水に溶解した溶液
を添加した。この液を以後原料Ａ液と略称する。(Example) 0.1 g of tetraethylene glycol-bis-methacrylate and 0.1 g of benzylmethyl ketal were dissolved in 25 g of acrylic acid, and this solution was further dissolved in 25 g of acrylic acid.
Added in 50g of glycerin. A solution of 7 g of KOH in 10 ml of water was added to the stirred mixture. This liquid will be abbreviated as raw material A liquid hereinafter.
水平におかれた台の上に表面にシリコンコーテ
イングを施した厚さ75μmのポリエステルフイル
ム（巾40mm、長さ500mm）をおきこの上にサイズ
が35mm×50mmで目付けが20g／m2のレーヨン製不
織布を各々10mmの間隔をおいて５ケならべ、また
さらに、直径30mmの円形に打ち抜いた同じ材質の
不織布を中心間の距離が40mmとなるように４ケな
らべておいた。35mm×50mmの長方形の不織布の上
には2.2gの原料Ａ液を、直径30mmの円形の不織布
の上には0.9gの原料Ａ液を滴下したところ、液は
流動して各々不織布の形状にひろがり安定した。
一部液とともに不織布の位置が移動したものがあ
つたが、ガラス棒で軽く不織布をおさえて移動し
たところ、液は不織布について移動し、所望の位
置に戻すことができた。 A 75 μm thick polyester film (width 40 mm, length 500 mm) with silicone coating on the surface is placed on a horizontal table, and on top of this is a rayon film measuring 35 mm x 50 mm and having a basis weight of 20 g/ m2 . Five pieces of nonwoven fabric were lined up with an interval of 10 mm between each piece, and four pieces of nonwoven fabric made of the same material punched into circles with a diameter of 30 mm were lined up so that the distance between the centers was 40 mm. When 2.2 g of raw material A liquid was dropped onto a rectangular nonwoven fabric measuring 35 mm x 50 mm, and 0.9 g of raw material liquid A was dropped onto a circular nonwoven fabric 30 mm in diameter, the liquids flowed and formed into the shape of each nonwoven fabric. It spread and stabilized.
In some cases, the position of the nonwoven fabric moved with the liquid, but when the nonwoven fabric was lightly held down with a glass rod and moved, the liquid moved along with the nonwoven fabric, and it was possible to return it to the desired position.
この物の全体を窒素ガスで置換した後長さ110
cmで40Wのケミカルランプの光に５分間さらし重
合せしめた。得られたゲル状物の上にシリコン処
理したポリエステルフイルムをおおい、長方形の
不織布からつくつたゲルについてはゲルとゲルの
中間の位置のポリエステルをカツターで切断し
た。このようにして内部が不織布で補強された35
mm×50mmのゲルが40mm×60mmの長方形のシリコン
処理されたポリエステルフイルムにはさまれたも
のが５ケ、また長方形のシリコン処理されたフイ
ルムの間に直径30mmの円形のゲルが４ケならべた
ものが得られた。いずれの場合にも含水ゲル複合
体の平面形状は不織布の形状とほぼ同じでありま
た不織布は上下いずれの面にも殆ど露出しておら
ず、良好な粘着性と凝集性を有していた。また断
面形状は第２図に示される形状であつた。 After replacing the whole thing with nitrogen gas, the length is 110
cm and exposed to light from a 40W chemical lamp for 5 minutes to polymerize. A silicone-treated polyester film was placed over the resulting gel-like material, and for the gel made from a rectangular nonwoven fabric, the polyester was cut at a position between the gels with a cutter. In this way, the inside was reinforced with non-woven fabric 35
There were 5 mm x 50 mm gels sandwiched between 40 mm x 60 mm rectangular silicone-treated polyester films, and 4 circular gels 30 mm in diameter were lined up between the rectangular silicone-treated films. I got something. In all cases, the planar shape of the hydrogel composite was almost the same as that of the nonwoven fabric, and the nonwoven fabric was hardly exposed on either the upper or lower surfaces and had good adhesiveness and cohesion. Moreover, the cross-sectional shape was the shape shown in FIG.
（効果）
実施例で得られた長方形の含水ゲル積層体を手
にもつて２枚のフイルムを引きはがすと容易に一
方のフイルムを剥すことができた。一枚のフイル
ムのみを剥した積層体を電極板の上に貼り付け、
他方のフイルムを剥すと含水ゲルを電極板の上に
残したまま容易にフイルムを剥すことができた。(Effect) When holding the rectangular hydrogel laminate obtained in the example and peeling off the two films, one of the films could be easily peeled off. A laminate with only one film removed is pasted on the electrode plate,
When the other film was peeled off, it was possible to easily peel off the film while leaving the hydrous gel on the electrode plate.
また、円形のゲル複合体が４個ならんだ積層体
の上下のフイルムを持つて剥すと、容易に剥離す
る事ができ、しかも４個の含水ゲル複合体はいず
れも同じ一方のフイルム上に残つた。これはフイ
ルムと含水ゲル複合体との接触面積が上下両面で
異なつており接着力が上面と下面で異なつている
事によると推定され、これら４つの含水ゲル複合
体を同時に他の電極面等に転写する事を可能にし
ている。このように本考案によれば、使用に際し
て、剥離が容易であり、また製造に際して切断が
容易であり、また長方形、円形の他複雑な形状の
ものでも容易に製造しうるという著しい効果が得
られる。 In addition, by holding the upper and lower films of a stack of four circular gel composites and peeling them off, it can be easily peeled off, and all four hydrogel composites remain on the same film. Ivy. This is presumed to be because the contact area between the film and the hydrogel composite is different on the upper and lower surfaces, and the adhesive strength is different on the top and bottom surfaces.These four hydrogel composites are simultaneously attached to other electrode surfaces, etc. It makes it possible to transcribe. As described above, the present invention has the remarkable effect that it is easy to peel when used, easy to cut during manufacturing, and can be easily manufactured into rectangular, circular, and other complex shapes. .
第１図は本考案の積層体の構造を示す模式的断
面図であり、第２図は本考案の一実施態様を示す
模式的断面図である。
FIG. 1 is a schematic cross-sectional view showing the structure of the laminate of the present invention, and FIG. 2 is a schematic cross-sectional view showing one embodiment of the present invention.
Claims (1)
よび１′とそれらの間に位置し、不織布により
内部補強された含水ゲル層２より構成され、且
つ前記の１および１′は含水ゲル層２の全周に
わたり含水ゲル層２と接触していない部分３を
有していることを特徴とする積層体。 (2) 内部補強に用いる不織布がレーヨン、ポリビ
ニルアルコール、ポリエステル、ポリアミドま
たはポリプロピレンのうちの少なくとも一種類
により構成されていることを特徴とする実用新
案登録請求の範囲第１項に記載の積層体。 (3) 不織布の目付が10〜40g／m2であることを特
徴とする実用新案登録請求の範囲第２項に記載
の積層体。 (4) 含水ゲル層２の外層１および１′と接触する
面の面積が互いに相異なつていることを特徴と
する実用新案登録請求の範囲第１項記載に記載
の積層体。 (5) 外層１および１′が含フッ素樹脂、シリコン
処理フイルムまたはシリコンコーテイング紙の
うちの１種である実用新案登録請求の範囲第１
項に記載の積層体。[Claims for Utility Model Registration] (1) Consisting of outer layers 1 and 1' made of water-repellent film or paper and a hydrogel layer 2 located between them and internally reinforced with non-woven fabric, and comprising the above-mentioned 1 and 1' is a laminate characterized in that it has a portion 3 that is not in contact with the hydrogel layer 2 over the entire circumference of the hydrogel layer 2. (2) The laminate according to claim 1, wherein the nonwoven fabric used for internal reinforcement is made of at least one of rayon, polyvinyl alcohol, polyester, polyamide, and polypropylene. (3) The laminate according to claim 2, wherein the nonwoven fabric has a basis weight of 10 to 40 g/m 2 . (4) The laminate according to claim 1, wherein the areas of the surfaces of the hydrogel layer 2 in contact with the outer layers 1 and 1' are different from each other. (5) Utility model registration claim No. 1 in which the outer layers 1 and 1' are one of fluorine-containing resin, silicone-treated film, or silicone-coated paper.
The laminate described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP734787U JPH0425320Y2 (en) | 1987-01-21 | 1987-01-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP734787U JPH0425320Y2 (en) | 1987-01-21 | 1987-01-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63116324U JPS63116324U (en) | 1988-07-27 |
| JPH0425320Y2 true JPH0425320Y2 (en) | 1992-06-17 |
Family
ID=30790713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP734787U Expired JPH0425320Y2 (en) | 1987-01-21 | 1987-01-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0425320Y2 (en) |
-
1987
- 1987-01-21 JP JP734787U patent/JPH0425320Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63116324U (en) | 1988-07-27 |
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