JPH0563387B2 - - Google Patents
Info
- Publication number
- JPH0563387B2 JPH0563387B2 JP61305067A JP30506786A JPH0563387B2 JP H0563387 B2 JPH0563387 B2 JP H0563387B2 JP 61305067 A JP61305067 A JP 61305067A JP 30506786 A JP30506786 A JP 30506786A JP H0563387 B2 JPH0563387 B2 JP H0563387B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- bag
- thin film
- metal thin
- film layer
- 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
- 239000010410 layer Substances 0.000 claims description 52
- 229910052751 metal Inorganic materials 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 27
- 239000010409 thin film Substances 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 16
- 230000001070 adhesive effect Effects 0.000 claims description 10
- 230000004888 barrier function Effects 0.000 claims description 10
- 239000000853 adhesive Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 9
- 239000012790 adhesive layer Substances 0.000 claims description 8
- 229920003002 synthetic resin Polymers 0.000 claims description 8
- 239000000057 synthetic resin Substances 0.000 claims description 8
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 description 9
- 238000010411 cooking Methods 0.000 description 5
- 239000010408 film Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 235000013305 food Nutrition 0.000 description 3
- 239000012793 heat-sealing layer Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009820 dry lamination Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011104 metalized film Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
- B65D81/3446—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
- B65D81/3461—Flexible containers, e.g. bags, pouches, envelopes
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Package Specialized In Special Use (AREA)
- Laminated Bodies (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は食品等を収納して、電子レンジで調
理可能な袋に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a bag that can store foods and the like and which can be cooked in a microwave oven.
近年、電子レンジなどで再加熱するだけで、食
卓に供することができる調理済或は半調理済食品
が増加しており、このような食品の味や品質の劣
化を防ぐため、光や空気、水分などに対してバリ
ヤー性の優れたアルミニウム箔などの金属薄膜層
を含む包装材料で密封包装することが一般に行な
われている。
In recent years, there has been an increase in the number of cooked or semi-cooked foods that can be served on the table simply by reheating them in a microwave oven, etc. In order to prevent the taste and quality of such foods from deteriorating, it is necessary to protect them from light, air, etc. It is common practice to hermetically package products using a packaging material containing a thin metal film layer, such as aluminum foil, which has excellent barrier properties against moisture and the like.
しかしながら、金属薄膜層は、マイクロ波を反
射してしまうため、上記のような包装形態のもの
をそのまま電子レンジに投入しても、内容物を加
熱することができず、また電子レンジ自体の故障
の原因にもなるため、包装体を開封して内容物を
取り出し、他の容器に移し換えて加熱している。
しかし、その場合も、容器をさらにラツプフイル
ムで包む必要があり、非常に面倒である。 However, since the metal thin film layer reflects microwaves, even if the above-mentioned packaging is placed in the microwave as is, the contents cannot be heated, and the microwave itself may malfunction. To avoid this, the package is opened, the contents are removed, and the contents are transferred to another container and heated.
However, even in that case, it is necessary to further wrap the container with wrap film, which is very troublesome.
そこで、上記のような手間を省くため、金属薄
膜層の部分を除去することができ、従つてそのま
まで調理可能な袋が既にこの発明者らによつて提
案されている。そして、金属薄膜層部分を剥離除
去するための剥離開始部を形成するについても、
ハーフカツトや未接着部分を予め設けておく方法
などを既にこの発明者らは提案しているが、両者
共に位置精度、生産性及び端緒の剥離しやすさに
問題があつた。 Therefore, in order to save the above-mentioned labor, the inventors have already proposed a bag in which the metal thin film layer can be removed and can be used for cooking as it is. Also, regarding the formation of a peeling start part for peeling and removing the metal thin film layer portion,
The inventors have already proposed methods such as half-cuts and methods in which unbonded portions are provided in advance, but both methods have had problems with positional accuracy, productivity, and ease of peeling off the ends.
そこで、この発明の目的は、上記のような袋に
おいて、剥離の端緒を容易に見つけだすことがで
き、かつ続く全面剥離にスムーズに移行できる手
段を提供することである。 SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a means for easily finding the beginning of peeling in the bag as described above, and allowing a smooth transition to subsequent full-scale peeling.
上記の目的を達成するため、この発明において
は、内面が熱融着可能な合成樹脂基材の外面にウ
レタン系接着剤層及びそれよりも接着強度の弱い
樹脂層を介して金属薄膜層を含むバリヤー層を積
層し、このバリヤー層を合成樹脂基材から手で剥
離可能とした積層シートより成る袋において、こ
の積層シートのバリヤー層を予め分離した剥離開
始部を、袋の少くとも一辺に設けておいたのであ
る。
In order to achieve the above object, the present invention includes a metal thin film layer on the outer surface of a synthetic resin base material whose inner surface is heat-sealable via a urethane adhesive layer and a resin layer having a weaker adhesive strength than the urethane adhesive layer. In a bag consisting of a laminated sheet on which a barrier layer is laminated and the barrier layer can be manually peeled off from a synthetic resin base material, a peeling start part where the barrier layer of the laminated sheet is separated in advance is provided on at least one side of the bag. I left it there.
前記の剥離開始部は、製袋ライン中で形成され
るため、その位置精度はたいへん良く、またコス
トも最小限増加にとどまる。
Since the above-mentioned peeling start part is formed in the bag making line, its positional accuracy is very high, and the increase in cost is kept to a minimum.
さらに、前記剥離開始部は、バリヤー層が分離
されたものであるから、剥離の端緒を作る必要は
なく、そのまま全面剥離に移行して行くことがで
きる。 Furthermore, since the barrier layer is separated from the peeling starting part, there is no need to create a beginning of peeling, and the entire peeling can proceed as it is.
まず、包装袋を形成するための積層シートにつ
いて説明する。
First, a laminated sheet for forming a packaging bag will be explained.
第１図に示すように、積層シート１は、合成樹
脂基材２の内面に熱融着層３、外面に、比較的接
着強度の弱い樹脂層４及び接着剤層５を混在させ
た層を介して、バリヤー層としての金属蒸着フイ
ルムのような金属薄膜層６を積層したものであ
る。なお、金属薄膜層６の外面に表面保護層７を
設けておくのがよい。この層７は合成樹脂のコー
テイングや合成樹脂フイルムの貼り合せなどによ
つて形成する。また、金属薄膜層６の外面に印刷
層を設けておくことができる。 As shown in FIG. 1, the laminated sheet 1 has a heat-sealing layer 3 on the inner surface of a synthetic resin base material 2, and a layer in which a resin layer 4 with relatively weak adhesive strength and an adhesive layer 5 are mixed on the outer surface. A metal thin film layer 6, such as a metallized film, is laminated as a barrier layer through the film. Note that it is preferable to provide a surface protection layer 7 on the outer surface of the metal thin film layer 6. This layer 7 is formed by coating with a synthetic resin or bonding a synthetic resin film. Further, a printed layer can be provided on the outer surface of the metal thin film layer 6.
上記基材２には、ポリエステル、ナイロン（商
品名）、ポリプロピレンなどが好適であり、それ
らの単体、複合体のいずれであつてもよい。ま
た、熱融着層３としては、ポリオレフイン、エチ
レン−酢酸ビニル共重体などが用いられる。な
お、基材２が、それ自体熱融着性を有すれば、こ
の層３は省略することができる。 The base material 2 is preferably made of polyester, nylon (trade name), polypropylene, or the like, and may be a single substance or a composite thereof. Further, as the thermal adhesive layer 3, polyolefin, ethylene-vinyl acetate copolymer, etc. are used. Note that this layer 3 can be omitted if the base material 2 itself has thermal adhesive properties.
前記樹脂層４は、比較的接着強度の弱い、例え
ばビニル樹脂やウレタン樹脂、アクリル樹脂やポ
リアミド樹脂、シリコーン樹脂などの単体或は混
合物から成り、この樹脂のパートコートによつて
形成されたものであつて、そのパターンの一例
は、第３図イ，ロ，ハに示すように、コートしな
い部分が点状、線状、格子状などの模様を形成す
るようにする。この樹脂層４を第１図とは逆に金
属薄膜層６に設けてもよい。 The resin layer 4 is made of a single material or a mixture of materials such as vinyl resin, urethane resin, acrylic resin, polyamide resin, and silicone resin, which have relatively low adhesive strength, and is formed by part coating of this resin. An example of the pattern is as shown in FIGS. 3A, 3B, and 3C, in which the uncoated portions form dotted, linear, or lattice patterns. This resin layer 4 may be provided on the metal thin film layer 6 contrary to FIG. 1.
前記接着剤層５は、レトルト殺菌処理を施して
も接着強度の低下が小さい接着剤を使用すること
が望ましい。その様な接着剤としては、２液硬化
型ウレタン系ドライラミネート用接着剤がある。 For the adhesive layer 5, it is desirable to use an adhesive whose adhesive strength does not decrease much even when subjected to retort sterilization treatment. Such adhesives include two-component curing urethane adhesives for dry lamination.
第２図に示すように、金属薄膜層６の内面に、
補強層６′を設けておくことができる。この補強
層６′は、ポリエステル、ポリプロピレン、ナイ
ロン、エポキシ樹脂などから成り、レトルト処理
の際の金属薄膜層の腐食を防止すると同時に、ガ
スバリヤー層としての厚みを増加せしめ、剥離を
容易にするのにも役立つ。なお、第１図及び第２
図に示す切り目Ａについては後述する。 As shown in FIG. 2, on the inner surface of the metal thin film layer 6,
A reinforcing layer 6' can be provided. This reinforcing layer 6' is made of polyester, polypropylene, nylon, epoxy resin, etc., and prevents corrosion of the metal thin film layer during retort processing, and at the same time increases the thickness as a gas barrier layer and facilitates peeling. Also useful. In addition, Figures 1 and 2
The cut A shown in the figure will be described later.
上記シート１を、熱融着層３同志を対抗させ周
囲をヒートシールすれば平袋、シート１同志を対
抗させた底部に底面シートを挿入し、所定部分を
ヒートシールすれば自立袋が得られる。 A flat bag can be obtained by heat-sealing the periphery of the sheet 1 with the heat-sealing layers 3 facing each other, and a self-supporting bag can be obtained by inserting a bottom sheet into the bottom of the sheet 1 facing each other and heat-sealing a predetermined portion. .
次に剥離開始部の形成方法について述べる。 Next, a method for forming the peeling starting portion will be described.
第４図は、平袋の製袋工程の一例を示し、イ
は、２枚のシート１を重ね合わせ、袋の底になる
部分１１を連続的にヒートシールした状態であ
る。ロはヒートシール部分１１から、材料の流れ
方向と平行に、金属薄膜層６の海面で基材２と分
離する工程であり、図中１２は、その分離部分で
ある。また第５図は、分離部分の断面を示してい
る。第４図ハは、袋のサイドシール１３を施した
状態であり、これにより、金属薄膜層６を分離し
た部分１２との交差部は再び接着される。最終的
にトリミングして袋１０となつた状態を第６図に
示す。図中１２が金属薄膜層の剥離口となる。 FIG. 4 shows an example of the bag-making process for flat bags, and (a) shows a state in which two sheets 1 are overlapped and the bottom portion 11 of the bag is continuously heat-sealed. B is a step in which the heat-sealed portion 11 is separated from the base material 2 at the surface of the metal thin film layer 6 in parallel to the flow direction of the material, and 12 in the figure is the separated portion. Further, FIG. 5 shows a cross section of the separated portion. FIG. 4C shows a state in which the side seal 13 of the bag has been applied, whereby the intersection with the part 12 from which the metal thin film layer 6 was separated is bonded again. FIG. 6 shows the final trimmed bag 10. In the figure, 12 is a peeling opening for the metal thin film layer.
ところで、金属薄膜層６を材料の流れ方向と平
行に分離するめの方法は、例えば薄いヘラのよう
なものを分離すべき界面に挿入することにより、
容易に可能であり、その挿入程度により、分離部
分１２の巾も容易に変えることができる。 By the way, a method for separating the metal thin film layer 6 in parallel to the flow direction of the material is, for example, by inserting something like a thin spatula into the interface to be separated.
This is easily possible, and the width of the separating portion 12 can also be easily changed depending on the degree of insertion.
この袋を、調理に供するには、第５図のよう
に、分離部分に１２においては、金属薄膜層６と
基材２が分離しているので金属薄膜層６を手でつ
まむことができる。そこを手がかりとして金属薄
膜層６を表面保護層７と共に引張ると、基材２か
ら剥離される。袋の反対面も、同様にして金属薄
膜層を剥離すると、第７図のように合成樹脂基材
２から成る袋が残る。この袋を電子レンジに入れ
て調理すればよい。 To use this bag for cooking, as shown in FIG. 5, the metal thin film layer 6 and the base material 2 are separated at the separation part 12, so the metal thin film layer 6 can be pinched by hand. When the metal thin film layer 6 is pulled together with the surface protection layer 7 using this as a clue, it is peeled off from the base material 2. When the metal thin film layer is peeled off from the opposite side of the bag in the same manner, a bag made of the synthetic resin base material 2 remains as shown in FIG. Just put this bag in the microwave and cook.
この調理の際、袋に前述のような切り目或いは
孔Ａ（第１図及び第２図）が設けてあると、内容
物が加熱によつて膨張しても袋が破裂することは
ない。 During this cooking, if the bag is provided with the above-mentioned cuts or holes A (FIGS. 1 and 2), the bag will not burst even if the contents expand due to heating.
なお、補強層６′が設けられている場合は、金
属薄膜層６と共に、上記の手順で剥離すればよ
い。 In addition, when the reinforcing layer 6' is provided, it may be peeled off together with the metal thin film layer 6 by the above-mentioned procedure.
以上は、平袋についての例を示したが、自立袋
の場合も同様であり、底面シートを２枚のシート
１の間に挿入し、底面部をヒートシールし、シー
ト１の金属薄膜層６を材料の流れ方向と平行に一
部分離し、次にサイドシールをすることにより、
剥離開始部が形成される。 The above example shows an example of a flat bag, but the same applies to the case of a self-standing bag, where the bottom sheet is inserted between two sheets 1, the bottom part is heat-sealed, and the metal thin film layer of sheet 1 is sealed. By partially separating parallel to the flow direction of the material and then side sealing,
A peel initiation portion is formed.
この発明の袋は、以上のように、袋を形成する
シートが合成樹脂と金属薄膜層との積層体より成
り、強靭でバリヤー性に優れており、常温流通、
長期保存などの取扱いに十分耐えることができ、
かつ内容物の変質を防止することができ、また積
層シートの金属薄膜層を剥離するための剥離開始
部を製袋時にインラインで形成することができる
ため、その精度は非常に高く、そのコストは最小
限にとどまる。
As described above, the bag of this invention is made of a laminate of a synthetic resin and a metal thin film layer, and is strong and has excellent barrier properties, and can be distributed at room temperature.
Can withstand handling such as long-term storage,
In addition, it is possible to prevent the contents from deteriorating, and the peeling start part for peeling off the metal thin film layer of the laminated sheet can be formed in-line during bag manufacturing, so the accuracy is very high and the cost is low. Stay minimal.
そして、積層シートの金属薄膜層を剥離するこ
とにより、電子レンジで調理できると共に、調理
時に切り目を設けておけば、内圧上昇による袋の
破裂を防止することができる。 By peeling off the metal thin film layer of the laminated sheet, it can be cooked in a microwave oven, and if a cut is made during cooking, it is possible to prevent the bag from bursting due to an increase in internal pressure.
即ち、この発明の袋は流通、保管、調理に至る
まで、一貫して使用することができるので取扱い
に非常に便利で手間が省け、同時に資源節約にも
役立つという効果がある。 That is, the bag of the present invention can be used throughout the process, from distribution to storage to cooking, making it very convenient and time-saving to handle, and at the same time it is effective in saving resources.
第１図及び第２図はこの発明の包装袋に用いる
積層シートの断面図、第３図は接着力の弱い樹脂
層の塗布パターンを示す平面図、第４図は平袋の
製袋過程を示す平面図、第５図は剥離開始部とな
る分離部分の拡大断面図、第６図は平袋の正面
図、第７図は金属薄膜層を剥離した平袋の斜視図
である。
１……積層シート、２……基材、３……熱融着
層、４……樹脂層、５……接着剤層、６……金属
薄膜層、１０……平袋、１２……分離部分、１３
……サイドシール。
Figures 1 and 2 are cross-sectional views of the laminated sheet used in the packaging bag of the present invention, Figure 3 is a plan view showing the coating pattern of the resin layer with weak adhesive strength, and Figure 4 is the bag-making process of the flat bag. FIG. 5 is an enlarged sectional view of the separated portion which becomes the peeling start part, FIG. 6 is a front view of the flat bag, and FIG. 7 is a perspective view of the flat bag from which the metal thin film layer has been peeled off. DESCRIPTION OF SYMBOLS 1... Laminated sheet, 2... Base material, 3... Heat sealing layer, 4... Resin layer, 5... Adhesive layer, 6... Metal thin film layer, 10... Flat bag, 12... Separation Part 13
...Side seal.
Claims (1)
ウレタン系接着剤層及びそれよりも接着強度の弱
い樹脂層を混在させた層を介して、金属薄膜層を
含むバリヤー層を積層した積層シートより成る袋
であつて、前記積層シートのバリヤー層を予め分
離した剥離開始部分を袋の少くとも一辺に設けた
ことを特徴とする包装袋。1. On the outer surface of a synthetic resin base material whose inner surface can be heat-sealed,
A bag made of a laminated sheet in which a barrier layer including a metal thin film layer is laminated via a layer containing a urethane adhesive layer and a resin layer with a weaker adhesive strength than the urethane adhesive layer, the barrier layer of the laminated sheet being laminated. 1. A packaging bag characterized by having a pre-separated peel-starting part provided on at least one side of the bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61305067A JPS63162481A (en) | 1986-12-18 | 1986-12-18 | Packaging bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61305067A JPS63162481A (en) | 1986-12-18 | 1986-12-18 | Packaging bag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63162481A JPS63162481A (en) | 1988-07-06 |
| JPH0563387B2 true JPH0563387B2 (en) | 1993-09-10 |
Family
ID=17940720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61305067A Granted JPS63162481A (en) | 1986-12-18 | 1986-12-18 | Packaging bag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63162481A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6366221B2 (en) * | 1980-12-08 | 1988-12-20 | Hasegawa Kagaku Kogyo Kk |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6366221U (en) * | 1986-10-21 | 1988-05-02 |
-
1986
- 1986-12-18 JP JP61305067A patent/JPS63162481A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6366221B2 (en) * | 1980-12-08 | 1988-12-20 | Hasegawa Kagaku Kogyo Kk |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63162481A (en) | 1988-07-06 |
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