JPS6149183B2 - - Google Patents
Info
- Publication number
- JPS6149183B2 JPS6149183B2 JP54068820A JP6882079A JPS6149183B2 JP S6149183 B2 JPS6149183 B2 JP S6149183B2 JP 54068820 A JP54068820 A JP 54068820A JP 6882079 A JP6882079 A JP 6882079A JP S6149183 B2 JPS6149183 B2 JP S6149183B2
- Authority
- JP
- Japan
- Prior art keywords
- vinyl acetate
- acetate copolymer
- nylon
- weight
- bottle
- 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
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 9
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 9
- 239000004677 Nylon Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 229920001778 nylon Polymers 0.000 claims description 6
- 239000011342 resin composition Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 5
- 230000004580 weight loss Effects 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000003905 agrochemical Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003317 industrial substance Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Landscapes
- Closures For Containers (AREA)
Description
(産業上の利用分野)
この発明は各種の容器に用いる中栓の改良に関
するものである。
(従来の技術)
一般に農薬、工業用薬剤などの液状品はガラス
又はプラスチツク製などのびん型容器に収容され
ているが、この場合に多くはそのびん口に中栓を
嵌め更にその外側にキヤツプを被せシール性を向
上させている。
この中栓としては従来低密度ポリエチレンある
いはエチレン−酢酸ビニルコポリマーの成形品に
よるものが大部分を占めて居り、これはかかる材
料が中栓としての適度の柔軟性をそなえているな
ど優れた特性を有しているからである。
(発明が解決しようとする問題点)
しかし上述した農薬あるいは工業用薬剤の中で
特定のものにこの中栓を使用すると内容液の減量
等の問題が免がれなかつた。
極端な場合にはびん本体をガラスとしたもの
で、内容液を石油ベンジンとし、ポリエチレン中
栓を施し外蓋を被せ常温にて12ケ月間放置したも
のにあつて該内容液の減量が2.0重量%に達する
ような事例もあり、又溶剤によつて、上記エチレ
ン酢酸ビニルコポリマーは溶解してしまう。
そこでかかる耐溶剤性に関して、プラスチツク
容器本体に対して樹脂の各種組合せ層を検討した
事例が、多数ある(例えば特開昭54−4679号、同
54−4681号公報等)。しかし中栓に関しては、か
かる技術的な検討がなされず、上記内容物減量等
に関し未解決の問題があつた。
ここに発明者等は、かかる農薬等の薬剤の減量
の問題を解消すべく多くの研究を重ねた結果、
偶々エチレン酢酸ビニル共重合体けん化物とナイ
ロンとの混合物よりなる中栓が驚くほど有効であ
ることを見出しこの発明に至つたものである。
(問題点を解決するための手段)
即ちこの発明は、主たる樹脂組成がエチレン酢
酸ビニル共重合体けん化物70〜30重量%及びナイ
ロン30〜70重量%の混合物であることを特徴とす
る容器用中栓である。
この発明で用いられるエチレン酢酸ビニル共重
合体けん化物はエチレン含有率20〜80%、けん化
度90%以上のものが良く、又これらの量を30〜70
重量%に限定した理由はその下限以下では上記減
量防止の効果が妨げられること、又上限を超える
と柔軟性がなくなるなどによるものである。
又ナイロンはナイロン6、ナイロン66などが適
宜用いられ、そしてこの量を70〜30重量%に限定
した理由はこの量比によりエチレン酢酸ビニル共
重合体けん化物に適当な柔軟性を与え得るためで
ある。
この発明において上記中栓の諸特性を損わない
範囲で上記組成中に他の添加剤を適量加えること
は何等差支えない。
又中栓の形状、構造には特に限定はなく、更に
成形手段も通常行われる方法において実施すれば
良い。
(作用)
この発明においてエチレン酢酸ビニル共重合体
けん化物が用いられていることによりその高いガ
スバリヤ性から上述の薬剤の散逸による減量が著
しく防止され、又ナイロンが用いられていること
によりその柔軟性が付与されることから中栓とし
ての適性が与えられ、結局上記の問題を解決し得
るものと推定される。
(実施例)
以下実施例によりこの発明を具体的に説明す
る。
実施例1〜3、及び比較例1〜6
下表の組成により図面の如く断面コ字形の中栓
を得、1ガラスびんにキシレンを1収容した
ものを夫々嵌め、常用される外蓋を被せ12ケ月放
置(室温)した後の内容液の減量を測定し、結果
を同表に示した。
(Industrial Application Field) This invention relates to improvements in inner stoppers used in various containers. (Prior art) Liquid products such as agricultural chemicals and industrial chemicals are generally stored in bottle-shaped containers made of glass or plastic. This improves sealing performance. Conventionally, most of these inner plugs have been made of molded products of low-density polyethylene or ethylene-vinyl acetate copolymer, and this is because such materials have excellent properties such as appropriate flexibility for inner plugs. This is because it has. (Problems to be Solved by the Invention) However, when this inner stopper is used for certain of the above-mentioned agricultural chemicals or industrial chemicals, problems such as a reduction in the content of the liquid cannot be avoided. In extreme cases, if the bottle body is made of glass, the liquid content is petroleum benzene, a polyethylene inner stopper is applied, an outer lid is placed on the bottle, and the bottle is left at room temperature for 12 months, the weight loss of the liquid content is 2.0%. In some cases, the ethylene vinyl acetate copolymer is dissolved by the solvent. Regarding such solvent resistance, there are many cases in which various combinations of resin layers have been investigated for the plastic container body (for example, JP-A-54-4679;
54-4681, etc.). However, no such technical studies were conducted regarding the inner stopper, and there were unresolved problems regarding the above-mentioned content reduction, etc. The inventors have conducted extensive research to solve the problem of reducing the amount of pesticides and other chemicals.
It was discovered by chance that an inner plug made of a mixture of saponified ethylene vinyl acetate copolymer and nylon was surprisingly effective, leading to the present invention. (Means for Solving the Problems) That is, the present invention provides a container for use in which the main resin composition is a mixture of 70 to 30% by weight of saponified ethylene vinyl acetate copolymer and 30 to 70% by weight of nylon. It is a middle stopper. The saponified ethylene vinyl acetate copolymer used in this invention preferably has an ethylene content of 20 to 80% and a degree of saponification of 90% or more, and the amounts thereof are 30 to 70%.
The reason why it is limited to % by weight is that below the lower limit, the above-mentioned effect of preventing weight loss is hindered, and above the upper limit, flexibility is lost. Nylon 6, nylon 66, etc. are appropriately used as the nylon, and the reason why this amount is limited to 70 to 30% by weight is that appropriate flexibility can be imparted to the saponified ethylene-vinyl acetate copolymer by this quantitative ratio. be. In the present invention, there is no problem in adding appropriate amounts of other additives to the composition as long as the properties of the inner stopper are not impaired. Further, there are no particular limitations on the shape and structure of the inner plug, and furthermore, the molding method may be carried out by a commonly used method. (Function) The use of saponified ethylene vinyl acetate copolymer in this invention significantly prevents weight loss due to the dissipation of the above-mentioned drug due to its high gas barrier properties, and the use of nylon makes it flexible. It is assumed that the above-mentioned problem can be solved after all, since it is given suitability as an inner stopper. (Example) The present invention will be specifically described below with reference to Examples. Examples 1 to 3 and Comparative Examples 1 to 6 An inner stopper with a U-shaped cross section as shown in the drawing was obtained using the compositions shown in the table below, one glass bottle containing one bottle of xylene was fitted into each bottle, and a commonly used outer lid was placed on top. The weight loss of the liquid content after being left for 12 months (at room temperature) was measured, and the results are shown in the same table.
【表】
上表の結果によれば本発明により内容液の減量
が著しく少なくし得ることが明らかである。
(発明の効果)
この発明は、中栓をエチレン酢酸ビニル共重合
体けん化物及びナイロンの混合物にて成形したこ
とにより、前記実施例からも明らかな如く従来品
に比べて内容品の減量を著しく少なくなし得たも
のでありその工業的価値は非常に大きい。[Table] According to the results shown in the above table, it is clear that the present invention can significantly reduce the amount of liquid content. (Effects of the Invention) In this invention, by molding the inner stopper from a mixture of saponified ethylene vinyl acetate copolymer and nylon, the weight of the contents can be significantly reduced compared to conventional products, as is clear from the above examples. It can be produced in small quantities and its industrial value is extremely large.
図面は本発明の実施例中栓の断面図である。 The drawing is a sectional view of a stopper according to an embodiment of the present invention.
Claims (1)
合体けん化物70〜30重量%及びナイロン30〜70重
量%の混合物であることを特徴とする容器用中
栓。1. An inner stopper for a container, characterized in that the main resin composition is a mixture of 70 to 30% by weight of saponified ethylene vinyl acetate copolymer and 30 to 70% by weight of nylon.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6882079A JPS55163152A (en) | 1979-06-04 | 1979-06-04 | Inner plug for container |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6882079A JPS55163152A (en) | 1979-06-04 | 1979-06-04 | Inner plug for container |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55163152A JPS55163152A (en) | 1980-12-18 |
JPS6149183B2 true JPS6149183B2 (en) | 1986-10-28 |
Family
ID=13384726
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6882079A Granted JPS55163152A (en) | 1979-06-04 | 1979-06-04 | Inner plug for container |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55163152A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6389489U (en) * | 1986-11-29 | 1988-06-10 |
-
1979
- 1979-06-04 JP JP6882079A patent/JPS55163152A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6389489U (en) * | 1986-11-29 | 1988-06-10 |
Also Published As
Publication number | Publication date |
---|---|
JPS55163152A (en) | 1980-12-18 |
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