JP3562531B2 - Laminate tube container with resilience - Google Patents
Laminate tube container with resilience Download PDFInfo
- Publication number
- JP3562531B2 JP3562531B2 JP5703794A JP5703794A JP3562531B2 JP 3562531 B2 JP3562531 B2 JP 3562531B2 JP 5703794 A JP5703794 A JP 5703794A JP 5703794 A JP5703794 A JP 5703794A JP 3562531 B2 JP3562531 B2 JP 3562531B2
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- Prior art keywords
- film
- laminating
- laminated
- polyethylene
- vapor
- Prior art date
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- 238000010030 laminating Methods 0.000 claims description 23
- 239000004698 Polyethylene Substances 0.000 claims description 18
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 15
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 15
- -1 polyethylene Polymers 0.000 claims description 15
- 229920000573 polyethylene Polymers 0.000 claims description 14
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 13
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 229910044991 metal oxide Inorganic materials 0.000 claims description 9
- 150000004706 metal oxides Chemical class 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 239000005001 laminate film Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000003475 lamination Methods 0.000 claims description 2
- 230000008021 deposition Effects 0.000 claims 4
- 229910052782 aluminium Inorganic materials 0.000 description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 12
- 230000004888 barrier function Effects 0.000 description 11
- 239000011888 foil Substances 0.000 description 10
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 7
- 229910001882 dioxygen Inorganic materials 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 5
- 239000005977 Ethylene Substances 0.000 description 5
- 229920000728 polyester Polymers 0.000 description 5
- 238000007740 vapor deposition Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 229920006267 polyester film Polymers 0.000 description 4
- 229910052814 silicon oxide Inorganic materials 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 description 2
- 238000009820 dry lamination Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 239000000606 toothpaste Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 229920006378 biaxially oriented polypropylene Polymers 0.000 description 1
- 239000011127 biaxially oriented polypropylene Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920006284 nylon film Polymers 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229940034610 toothpaste Drugs 0.000 description 1
- 239000012463 white pigment Substances 0.000 description 1
Images
Landscapes
- Tubes (AREA)
- Laminated Bodies (AREA)
Description
【０００１】
本発明は、液状又はクリ−ム状の化粧品や練り歯磨き等の内容物を充填したラミネ−トチュ−ブ容器に関し、特に内容品を押出した後でも再び元の形状に戻る復元性のあるラミネ−トチュ−ブ容器に関する。
【産業上の利用分野】
【０００２】
【従来の技術】
従来より練り歯磨等は、酸素ガスバリヤ−性及び水蒸気バリヤ−性に優れたアルミニウム箔を含んだプラスチックフィルムを積層したラミネ−トフィルムで構成されたチュ−ブ状容器に充填されているが、このようなアルミニウム箔を使用したラミネ−トチュ−ブは、内容物を容器より押出した後手を離すと元の形状に戻る所謂復元性が乏しく、またアルミニウムを使用していることから環境に対する負荷が大きいという問題を抱えている。
【０００３】
このような復元性や環境問題を解決するために、アルミニウム箔の使用を避けることが行われている。最近、その一例として、アルミニウム箔に代わって酸化ケイ素蒸着層を有するフィルムを用いたラミネ−トチュ−ブ容器が提案されている（実開昭４−５４８４２号公報参照）。この公報に記載のチュ−ブ容器は、アルミニウム箔に代えて、酸化ケイ素蒸着層を形成した基体シ−トを使用するものであるが、この容器は復元性の点については全く考慮されていない。
【０００５】
【発明が解決しようとする課題】
本発明者は、アルミニウム箔を使用することなく、しかも酸素ガスバリヤ−性及び水蒸気バリヤ−性に優れた復元性の良好なラミネ−トチュ−ブ容器について種々検討した結果、本発明を完成したもので、本発明の目的は優れた復元性を有すると共に優れた酸素ガスバリヤ−性と水蒸気バリヤ−性のあるラミネ−トチュ−ブ容器を提供することである。
【０００６】
【課題を解決するための手段】
本願発明の要旨は、金属、金属酸化物又は無機物の蒸着層を有する蒸着フィルムの蒸着面に接着剤を介して線状低密度ポリエチレンをドライラミネ−トした上に、線状低密度ポリエチレンを、該蒸着フィルムの他方の面にポリエチレン／白色エチレン・酢酸ビニル共重合体／ポリエチレンよりなる積層フィルム層を、それぞれ積層したラミネ−トフィルムをもってチュ−ブ状容器を構成したことを特徴とする復元性のあるラミネ−トチュ−ブ容器である。
【０００７】
すなわち、本発明においては、上記したように、白色エチレン・醋酸ビニル共重合体よりなるフィルム層を使用することによって良好な復元性を付与することができると共に、金属、金属酸化物又は無機物を蒸着したフィルムを使用し、これを線状低密度ポリエチレンとドライラミネ−トした上で線状低密度ポリエチレンと積層したことによって蒸着層にダメ−ジを与えることなくアルミ箔に近い酸素ガスバリヤ−性及び水蒸気バリヤ−性を有するチュ−ブ状容器を得ることができた。
そして、このチュ−ブ状容器は、アルミ箔を使用していないので環境問題をも解決することができ、また、良好な復元性を有するので、スタンデングチュ−ブ容器としても使用できるラミネ−トチュ−ブ容器を提供することができた。
【０００８】
本発明について詳細に説明する。
本発明で使用するアルミ箔の代わりに使用する金属、金属酸化物又は無機物を蒸着した蒸着フィルム層は、ベースフィルムとして、ナイロンフィルム、ポリエチレンテレフタレ−トフィルム（ＰＥＴ）、二軸延伸ポリプロピレン等を使用するが、通常ポリエステル（ＰＥＴ）フィルムが使用される。これらのベ−スフィルムの厚さとしては、特に規定されないが、ポリエステル（ＰＥＴ）フィルムの場合約１２μｍ程度が好ましい。また、蒸着する金属、金属酸化物又は無機物としては、アルミニウム、クロム、酸化アルミ、酸化けい素等である。この蒸着手段としては、ベ−スフィルム上に真空蒸着法、イオンプレ−ティング法、スパッタリング法、プラズマ法等任意の方法で蒸着膜を設ければよい。
【０００９】
本願発明においては、この蒸着層の上に接着剤を介してドライラミネ−トにより線状低密度ポリエチレン（ＬＬＤＰＥ）の層を設ける。通常この種のラミネ−トフィルムを得るには、押出しラミネ−トによって行われるが、フィルムの蒸着層の上にＬＬＤＰＥを直接ラミネ−トすると酸素ガスバリヤ−性等の性能が低下するので、一旦接着剤を介してドライラミネ−トによってＬＬＤＰＥ層を設け、しかる後、ＬＬＤＰＥを押出しラミネ−トするのである。このドライラミネ−トに使用する接着剤としては、主としてポリウレタン系接着剤等である。
【００１０】
本発明においては、前記蒸着フィルム層のベ−スフィルム側には、白色エチレン・酢酸ビニル共重合体（ＥＶＡ）フィルムの両面にポリエチレンフィルムを積層した積層フィルム層を積層する。
白色エチレン・酢酸ビニル共重合体フィルムの代わりに低密度ポリエチレン（ＬＤＰＥ）、あるいは線状低密度ポリエチレン（ＬＬＤＰＥ）のフィルムを使用しても良いが復元性の上からはエチレン・酢酸ビニル共重合体フィルムが好ましい。
本発明において、蒸着フィルム層のベ−スフィルム側に、この白色エチレン・酢酸ビニル共重合体（ＥＶＡ）フィルムの両面にポリエチレンフィルムを積層した積層フィルム層を使用することによって復元性を付与することができる。ここで、白色エチレン・酢酸ビニル共重合体（ＥＶＡ）フィルムとは白色顔料を添加して白色に着色したＥＶＡフィルムであって、ＥＶＡフィルムを白色とした理由は、無色のフィルムを使用した場合、内容物の色が表面に表れ目立ち過ぎるからである。もっとも、内容物の色が表れた方が良い場合も有るが、容器の表面に印刷を施した場合、印刷効果が表れないので、ＥＶＡに酸化チタン等を配合して白色フィルムとする。これによって、印刷上の見映えが良好となる。そして、このＥＶＡフィルムの厚さとしては１００〜２５０μ程度のものが使用されるが約２００μ程度が最も好ましく、この程度の厚さのものが最も復元性が良好である。
【００１１】
この白色ＥＶＡフィルムの両面に、ＰＥを押し出によってラミネ−トする。この場合のＰＥフィルムの厚さは等しくても良く、或は差をもたせても良いが、一例を挙げると外面のＰＥフィルムの厚さを約６０μｍ、内面のＰＥフィルムの厚さを約２５μｍが良い。
【００１２】
以上のラミネ−トフルムの層構成を示すと図１の通りである。図１においてポリエステルフィルム２の表面に金属、金属酸化物又は無機物の蒸着層１の上にＬＬＤＰＥよりなるドライラミネ−ト層３を設け、その上にＬＬＤＰＥフィルム４を押出しラミネ−トによって積層し、この積層フィルムに熱接着性を付与する。他方、金属、金属酸化物又は無機物蒸着ポリエステルフィルムの他の面に、白色ＥＶＡフィルム５の両面にポリエチレンフィルム６、７を積層したフィルムを積層する。
このようにして得られた積層フィルムのＬＬＤＰＥ面を内面として熱接着することによって容易にラミネ−トチュ−ブ容器を得ることができる。
【００１３】
【実施例】
次に実施例をもって具体的に本発明を説明するが、本発明はこの実施例に限定されるものではない。
実施例１
厚さ１２μｍのポリエステルフィルムの一方の面に酸化ケイ素を蒸着した蒸着フィルムの蒸着面に接着剤を介して線状低密度ポリエチレンをドライラミネ−トし、その上に厚さ５０μｍの線状低密度ポリエチレンを押し出し積層する。
他方、厚さ２００μｍの白色エチレン・酢酸ビニル共重合体フィルムの一方の面に厚さ６０μｍのポリエチレンフィルムを、他方の面に厚さ２５μｍのポリエチレンフィルムをそれぞれ積層する。得られた積層フィルムの厚さ２５μｍのポリエチレンフィルム側に、先に述べた蒸着フィルムのベ−スフィルムを積層する。このようにして得られた積層フィルムの酸素ガスバリヤ−性及び水蒸気バリヤ−性について測定したところ、酸素ガス透過率は１．５ｃｃ／ｍ２．２４ｈｒであり、水蒸気透過率は１．０ｇ／ｍ２．２４ｈｒであった。この積層フィルムをもってチュ−ブ状容器を成形したところ、極めて良好な復元性を有していた。
【００１４】
【発明の効果】
以上述べたように本発明はアルミ箔に代えて金属、金属酸化物又は無機物の蒸着フィルムを使用し、その蒸着面に接着剤を介して、線状低密度ポリエチレンをドライラミネ−トした上に線状低密度を、他方、該蒸着フィルムのベ−スフィルム側にポリエチレン／白色エチレン・酢酸ビニル共重合体／ポリエチレンよりなる積層フィルム層を、それぞれ積層したラミネ−トフィルムをもってチュ−ブ状容器を構成したことによって復元性のあるラミネ−トチュ−ブ容器とすることができ、その結果、良好な復元性を有するスタンデングチュ−ブ容器としても使用できるラミネ−トチュ−ブ容器を提供することができた。
【図面の簡単な説明】
【図１】本発明のラミネ−トチュ−ブ容器を構成するラミネ−トフィルムの層構成を示す断面図
【符号の説明】
１ 金属、金属酸化物又は無機物蒸着層
２ ポリエステルフィルム層
３ ドライラミネ−ト
４ ＬＬＤＰＥフィルム層
５ 白色エチレン・酢酸ビニルフィルム層
６、７ ポリエチレンフィルム層[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminating tube container filled with contents such as liquid or creamy cosmetics and toothpaste, and more particularly to a laminating tube having a resilience which returns to its original shape even after extruding the contents. The present invention relates to a tube container.
[Industrial applications]
[0002]
[Prior art]
Conventionally, toothpastes and the like have been filled in a tube-like container composed of a laminated film laminated with a plastic film containing an aluminum foil having excellent oxygen gas barrier properties and water vapor barrier properties. A laminating tube using an aluminum foil has a poor so-called resilience that returns to its original shape when the contents are extruded from a container and then is released, and that the load on the environment is high because aluminum is used. Have a problem.
[0003]
In order to solve such resilience and environmental problems, the use of aluminum foil has been avoided. Recently, as one example, a laminating tube container using a film having a silicon oxide vapor-deposited layer instead of an aluminum foil has been proposed (see Japanese Utility Model Laid-Open No. 4-54842). The tube container described in this publication uses a substrate sheet having a silicon oxide vapor-deposited layer formed thereon in place of the aluminum foil, but this container does not take into consideration the resilience at all. .
[0005]
[Problems to be solved by the invention]
The present inventor has conducted various studies on a laminating tube container which does not use an aluminum foil and has excellent oxygen gas barrier properties and excellent water vapor barrier properties and good resilience. An object of the present invention is to provide a laminating tube container having excellent oxygen gas barrier properties and excellent water vapor barrier properties as well as excellent restoring properties .
[0006]
[Means for Solving the Problems]
The gist of the present invention is to dry-laminate linear low-density polyethylene via an adhesive on the vapor-deposited surface of a vapor-deposited film having a metal, metal oxide or inorganic vapor-deposited layer, the other side polyethylene / white ethylene-vinyl acetate copolymer / polyethylene comprising a laminate film layer of deposited film, laminating and laminating each - resilient, characterized in that to constitute a blanking shaped container - Ju with Tofirumu Laminate tube container.
[0007]
That is, in the present invention, as described above, good resilience can be imparted by using a film layer made of a white ethylene-vinyl acetate copolymer, and a metal, a metal oxide, or an inorganic substance is deposited. Oxygen gas barrier properties and water vapor close to that of an aluminum foil without damaging the deposited layer by laminating this film with linear low-density polyethylene and then laminating it with linear low-density polyethylene. A tube-shaped container having barrier properties was obtained.
And since this tube-shaped container does not use aluminum foil, it can also solve environmental problems, and since it has good resilience, it can be used as a standing tube container. A tube container could be provided.
[0008]
The present invention will be described in detail.
In place of the aluminum foil used in the present invention, a metal film, a metal oxide, or an inorganic material is used as a vapor-deposited film layer. A nylon film, a polyethylene terephthalate film (PET) , a biaxially oriented polypropylene, or the like is used as a base film. However, a polyester (PET) film is usually used. The thickness of these base films is not particularly limited, but is preferably about 12 μm for polyester (PET) films. The metal, metal oxide or inorganic substance to be deposited is aluminum, chromium, aluminum oxide, silicon oxide, or the like. As the vapor deposition means, a vapor deposition film may be provided on the base film by any method such as a vacuum vapor deposition method, an ion plating method, a sputtering method, and a plasma method.
[0009]
In the present invention, a layer of linear low-density polyethylene (LLDPE) is provided on this vapor deposited layer by dry lamination via an adhesive. Usually, this type of laminated film is obtained by extrusion laminating. However, if LLDPE is directly laminated on the vapor deposited layer of the film, the performance such as oxygen gas barrier property is reduced. Then, an LLDPE layer is provided by dry lamination through the above, and then the LLDPE is extruded and laminated. The adhesive used for the dry laminate is mainly a polyurethane adhesive or the like.
[0010]
In the present invention, a laminated film layer in which a polyethylene film is laminated on both sides of a white ethylene-vinyl acetate copolymer (EVA) film is laminated on the base film side of the vapor-deposited film layer.
A low density polyethylene (LDPE) or linear low density polyethylene (LLDPE) film may be used in place of the white ethylene / vinyl acetate copolymer film, but from the viewpoint of restorability, the ethylene / vinyl acetate copolymer is used. Films are preferred.
In the present invention, restoring property is imparted by using a laminated film layer in which a polyethylene film is laminated on both sides of this white ethylene / vinyl acetate copolymer (EVA) film on the base film side of the vapor-deposited film layer. Can be. Here, the white ethylene-vinyl acetate copolymer (EVA) film is an EVA film colored by adding a white pigment to white, and the reason for making the EVA film white is that a colorless film is used. This is because the color of the contents appears on the surface and is too conspicuous. Of course, there are cases where it is better to show the color of the contents. However, when printing is performed on the surface of the container, a printing effect is not obtained. Therefore, titanium oxide or the like is mixed with EVA to form a white film. As a result, the appearance on printing is improved. The EVA film has a thickness of about 100 to 250 .mu.m, but is preferably about 200 .mu.m, and a film having this thickness has the best restoring property.
[0011]
The PE is extruded on both sides of the white EVA film by extrusion. In this case, the thickness of the PE film may be equal or different, but for example, the thickness of the outer PE film is about 60 μm, and the thickness of the inner PE film is about 25 μm. good.
[0012]
FIG. 1 shows the layer structure of the above laminated film. In FIG. 1, a dry laminating layer 3 made of LLDPE is provided on a metal, metal oxide or inorganic vapor-deposited layer 1 on the surface of a
By laminating the laminated film thus obtained with the LLDPE surface as the inner surface, a laminating tube container can be easily obtained.
[0013]
【Example】
Next, the present invention will be described specifically with reference to examples, but the present invention is not limited to these examples.
Example 1
A low-density linear polyethylene having a thickness of 50 μm is dry-laminated on a vapor-deposited surface of a polyester film having a thickness of 12 μm on which silicon oxide is vapor-deposited by an adhesive on a vapor-deposited surface of the vapor-deposited film. Are extruded and laminated.
On the other hand, a polyethylene film having a thickness of 60 μm is laminated on one surface of a white ethylene / vinyl acetate copolymer film having a thickness of 200 μm, and a polyethylene film having a thickness of 25 μm is laminated on the other surface. On the polyethylene film having a thickness of 25 μm of the obtained laminated film, the above-mentioned base film of the vapor-deposited film is laminated. When the oxygen gas barrier property and the water vapor barrier property of the laminated film thus obtained were measured, the oxygen gas permeability was 1.5 cc / m 2 . 24 hr, and the water vapor transmission rate was 1.0 g / m 2 . It was 24 hours. When a tube-shaped container was formed from this laminated film, it had extremely good resilience.
[0014]
【The invention's effect】
As described above, the present invention uses a metal, metal oxide, or inorganic vapor-deposited film in place of aluminum foil, and applies linear low-density polyethylene to the vapor-deposited surface via an adhesive, followed by wire lamination. the Jo low density, while base of the vapor deposition film - constituting the blanking-like container - scan the film side laminate film layer made of a polyethylene / white ethylene-vinyl acetate copolymer / polyethylene, laminating and laminating each - with Tofirumu Ju As a result, a laminating tube container having resilience can be obtained, and as a result, a laminating tube container which can be used as a standing tube container having good resilience can be provided. Was.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a layer structure of a laminating film constituting a laminating tube container of the present invention.
DESCRIPTION OF SYMBOLS 1 Metal, metal oxide or inorganic
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5703794A JP3562531B2 (en) | 1994-03-28 | 1994-03-28 | Laminate tube container with resilience |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5703794A JP3562531B2 (en) | 1994-03-28 | 1994-03-28 | Laminate tube container with resilience |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07257609A JPH07257609A (en) | 1995-10-09 |
| JP3562531B2 true JP3562531B2 (en) | 2004-09-08 |
Family
ID=13044251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5703794A Expired - Fee Related JP3562531B2 (en) | 1994-03-28 | 1994-03-28 | Laminate tube container with resilience |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3562531B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6341884B2 (en) * | 2015-06-10 | 2018-06-13 | 株式会社ライテク | Shed and retaining wall |
| WO2017204752A1 (en) | 2016-05-26 | 2017-11-30 | Kimpai Lamitube Co., Ltd. | Multi layered flexible sheet with high specular gloss |
-
1994
- 1994-03-28 JP JP5703794A patent/JP3562531B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07257609A (en) | 1995-10-09 |
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