JPH0329747A - Metal container - Google Patents
Metal containerInfo
- Publication number
- JPH0329747A JPH0329747A JP16490989A JP16490989A JPH0329747A JP H0329747 A JPH0329747 A JP H0329747A JP 16490989 A JP16490989 A JP 16490989A JP 16490989 A JP16490989 A JP 16490989A JP H0329747 A JPH0329747 A JP H0329747A
- Authority
- JP
- Japan
- Prior art keywords
- paint
- epoxy
- container
- content
- molecular weight
- 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.)
- Granted
Links
- 229910052751 metal Inorganic materials 0.000 title claims description 23
- 239000002184 metal Substances 0.000 title claims description 23
- 239000003973 paint Substances 0.000 claims abstract description 27
- 239000004593 Epoxy Substances 0.000 claims abstract description 21
- 239000003054 catalyst Substances 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 11
- 239000000796 flavoring agent Substances 0.000 abstract description 15
- 235000019634 flavors Nutrition 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 7
- 230000001954 sterilising effect Effects 0.000 abstract description 4
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 description 18
- 238000000576 coating method Methods 0.000 description 18
- 239000011253 protective coating Substances 0.000 description 5
- 230000000704 physical effect Effects 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002087 whitening effect Effects 0.000 description 2
- 239000002519 antifouling agent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002778 food additive Substances 0.000 description 1
- 235000013373 food additive Nutrition 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000005029 tin-free steel Substances 0.000 description 1
- 239000005028 tinplate Substances 0.000 description 1
Landscapes
- Rigid Containers With Two Or More Constituent Elements (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
Abstract
Description
【発明の詳細な説明】
■産業上の利用分野
この発明は、耐レトルト性、内容物の香味保持性（以下
フレーバー性と称す）に優れた塗料を容器内面に被覆し
た金属製容器に関する．■従来の技術
従来の金属製容器は、素材としてブリキ、ティンフリー
スチール、アルミニウム等が用いられ、通常これらの金
属の腐食や内容物中への金属溶出を防止するために、金
属製容器の内面には保護塗膜として塗料が被覆されてい
る．そして、容器内面の被覆塗料としては、エポキシフ
ェノール系塗料、エポキシアミノ系塗料、エポキシアミ
ド系塗料等が用いられている．これらの保護塗料は加工
性、耐食性が良好で、ピンボール等の塗膜欠陥が少ない
という点で優れており、中でもエポキシフェノール系塗
料を金属缶の保護塗膜として用いることは従来から広く
知られている．
■発明が解決しようとする課題
しかしながら、上記塗料が保護塗膜として用いられる場
合、高温殺菌工程を必要とする内容物の場合に要求され
る、耐レトルト性及びフレーバー性が十分とは言えなか
った．すなわち、最近金属製容器に充填される内容物の
種類が急増するに連れて、充填後に内容物を収納した金
属製容器をレトルト処理する機会が多くなっている。こ
のような金属製容器に要求される内面塗膜の物性として
、塗膜自体がレトルト処理に耐えるものでなければなら
ず、又レトルト処理の際に、塗膜から抽出する物質によ
って、容器内の内容物が影響を受けてはならず、フレー
バー性が優れていることが条件とされる．
この発明は、このような課題に着目してなされたもので
、塗膜の強靭性、耐抽出性に優れ、ピンホール等の欠陥
が少なく、さらには耐レトルト性、フレーバー性に優れ
た塗料を容器内面に被覆した金属製容器を提供すること
を目的とする。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a metal container whose inner surface is coated with a paint that has excellent retort resistance and flavor retention (hereinafter referred to as flavor property) of the contents. ■Conventional technology Conventional metal containers are made of tinplate, tin-free steel, aluminum, etc., and the inner surface of the metal container is usually coated to prevent corrosion of these metals and metal elution into the contents. is coated with paint as a protective coating. Epoxyphenol paints, epoxyamino paints, epoxyamide paints, etc. are used as coating paints for the inner surface of containers. These protective paints have good processability and corrosion resistance, and are excellent in that they have few paint film defects such as pinballs. Among them, the use of epoxyphenol paints as protective paint films for metal cans has been widely known for a long time. ing. ■Problems to be solved by the invention However, when the above paint is used as a protective coating, it cannot be said that the retort resistance and flavor resistance required for contents that require a high temperature sterilization process are sufficient. ．． That is, as the types of contents filled into metal containers have recently increased rapidly, there have been more opportunities to retort the metal containers containing the contents after filling. As for the physical properties of the inner coating film required for such metal containers, the coating film itself must be able to withstand retort processing, and during retort processing, substances extracted from the coating film may cause damage to the inside of the container. The conditions are that the contents must not be affected and the flavor properties must be excellent. This invention was made with a focus on these problems, and aims to create a paint that has excellent coating film toughness and extraction resistance, has few defects such as pinholes, and has excellent retort resistance and flavor properties. The object is to provide a metal container whose inner surface is coated.
■課題を解決するための手段
この課題を解決するため、この発明は塗料中に低分子量
エポキシの含有量が少なく、かつ塗料製造工程において
触媒が介在しないで生戒されたエポキシフェノールを、
容器内面に被覆したことを特徴とする金属製容器である
．
■作用及び実施例
この発明に係る金属製容器内面に被覆されるエポキシフ
ェノールと、従来から用いられているエポキシフェノー
ルとを比較すると、この発明に用いられるエポキシフェ
ノールは、塗料中に低分子量エポキシの含有量が少なく
、かつ製造工程において触媒を使用しない点に特徴を有
する．すなわち発明者らは、低分子量エポキシの含有量
が多い従来のエポキシフェノールを、金属製容器内面の
保護塗膜に使用した場合に、この低分子量エポキシが内
容物中に抽出することにより、内容物の風味を低下させ
ることを研究結果から知り、特に金属製容器をレトルト
処理した後は、フレーバー性が大きく低下することに注
目した．又、従来エポキシフェノールの製造工程におい
て、触媒を介在させて生成したエポキシフェノールを、
容器内面に被覆した金属製容器は、同様にフレーバー性
が低下している事実に注目した．これは、保護塗膜中に
残留する触媒が内容物中に抽出することにより、フレー
バー性を低下させているものと考えられる．さらに、低
分子量エポキシの含有量を低下させることにより、全体
として塗膜中の高分子量エポキシの含有量を多くし、塗
膜の耐抽出性（ＫＭ．０４消費量の削減）、強靭性、さ
らには耐レトルト性が向上することを見出した．そこで
発明者らは、これらの耐レトルト性及びフレーバー性を
低下させる要因を除外したエポキシフェノールを金属製
容器の保護塗膜として被覆することを思いついたのであ
る．
この発明に用いられたエポキシフェノール、従来のエポ
キシフェノール、エポキシアクリレート及び変性エポキ
シを、各々金属製容器内面に被覆して塗膜の物性を比較
した．すなわち、表面を清浄したテスト缶（アルミニウ
ム製有底円筒缶、容量：３５０ｃｃ、厚さ：０．１５ｍ
＞内面に、塗膜重量が６０ｍｇ／ｄ−となるように各塗
料を塗布し、ついで焼付け（温度：２００℃、時間＝５
分間）を施し、塗膜（厚さ：約５μｍ）を形戊した．又
、このテスト缶内には、３３５ｍｌの蒸留水を充填（充
填温度９５℃、窒素充填）し、レトルト処理を１２２℃
の高温蒸気中において、２５分間行なった．
上記レトルト処理された塗膜の物性を、下記の方法に従
って求めた．その結果を第１表に示す．（通電値）
容器内に５％の塩化ナトリウム水溶液を入れ、直流６．
３■で通電し、４秒後の電流値を読み取った．
（ラビングテスト〉
２ボンドハンマーの先端にガーゼ１６枚を重ね合わせ、
これにメチルエチルケトンを十分にしみこませた後、塗
膜を約１５ｃｍ幅でこすり、塗膜が剥離するまでの回数
を数えた。■Means for solving the problem In order to solve this problem, this invention uses epoxy phenol that has a low content of low molecular weight epoxy in the paint and is produced without the intervention of a catalyst in the paint manufacturing process.
This is a metal container characterized by a coating on the inside of the container. ■Operations and Examples Comparing the epoxy phenol coated on the inner surface of the metal container according to this invention with the epoxy phenol used conventionally, it is found that the epoxy phenol used in this invention contains low molecular weight epoxy in the paint. It is characterized by its low content and the fact that no catalyst is used in the manufacturing process. In other words, the inventors discovered that when conventional epoxy phenol, which has a high content of low molecular weight epoxy, is used as a protective coating on the inner surface of a metal container, this low molecular weight epoxy is extracted into the contents, thereby reducing the content of the contents. We learned from research results that it reduces the flavor of metal containers, and we focused on the fact that the flavor properties are significantly reduced, especially after retort processing of metal containers. In addition, in the conventional epoxy phenol manufacturing process, epoxy phenol produced through the intervention of a catalyst,
We focused on the fact that the flavor properties of metal containers coated on the inner surface were similarly reduced. This is thought to be because the catalyst remaining in the protective coating is extracted into the contents, reducing flavor properties. Furthermore, by lowering the content of low molecular weight epoxy, the content of high molecular weight epoxy in the coating film as a whole can be increased, improving the extraction resistance of the coating film (reduction of KM.04 consumption), toughness, and found that retort resistance was improved. Therefore, the inventors came up with the idea of coating metal containers with epoxyphenol, which eliminates these factors that reduce retort resistance and flavor properties, as a protective coating. The epoxy phenol used in this invention, conventional epoxy phenol, epoxy acrylate, and modified epoxy were each coated on the inner surface of a metal container, and the physical properties of the coating films were compared. That is, a test can with a clean surface (aluminum cylindrical can with a bottom, capacity: 350 cc, thickness: 0.15 m)
> Each paint was applied to the inner surface so that the coating weight was 60 mg/d-, and then baked (temperature: 200°C, time = 5
A coating film (thickness: approximately 5 μm) was formed. In addition, this test can was filled with 335 ml of distilled water (filling temperature: 95°C, filled with nitrogen), and retorted at 122°C.
The test was carried out for 25 minutes in high-temperature steam. The physical properties of the retort-treated coating film were determined according to the following method. The results are shown in Table 1. (Electrification value) Put a 5% sodium chloride aqueous solution in a container and apply a direct current of 6.
I turned on the current at 3■ and read the current value after 4 seconds. (Rubbing test) Layer 16 pieces of gauze on the tip of a 2-bond hammer,
After sufficiently soaking methyl ethyl ketone into this, the coating film was rubbed in a width of about 15 cm, and the number of times until the coating film peeled off was counted.
（ＫＭ．，Ｏ．消費量〉
厚生省告示３７０号、食品添加物等の規格基準第３器具
及び容器包装のＢ−１過マンガン酸カリウム消費量試験
法に準じた。また溶出比率は０．７ ５ ｃｍ”／ １
ｃｃとした。(KM., O. consumption) According to Ministry of Health and Welfare Notification No. 370, Standard Standard for Food Additives, B-1 Potassium Permanganate Consumption Test Method for Appliances and Containers and Packaging. Also, the elution ratio is 0.7 5 cm”/1
It was set as cc.
（塗膜白化の有無）
温度：１２２℃、時間＝２５分において、レトルト処理
後の塗膜表面状態を目視した．有：塗膜が白くにごっで
いる．
無：塗膜に変化なし
（フレーバーテスト）
１０人のパネラーによって、缶内に充填された水を賞味
した。５点法により、１０人の平均値を取った。(Presence or absence of paint film whitening) The surface condition of the paint film after retort treatment was visually observed at a temperature of 122°C and a time of 25 minutes. Yes: The paint film is white and cloudy. No: No change in coating film (flavor test) Ten panelists tasted the water filled in the can. The average value of 10 people was taken using the 5-point method.
１、気にならない
３、やや気になろ
う、非常に気になる
２、ほとんど気にならない
４、気になる
上記、第１表に示すように、この発明に係る金属製容器
に被覆されたエポキシフェノールの物性を分析すると、
ＫＭ．０４消費量が従来のエポキシフェノールより少な
く、塗膜の耐抽出性が良好であることが判明した．又、
レトルト処理後における塗膜白化現象も認められず、又
フレーバーテストにおいても、池の被覆塗料より優れて
いるという結果が得られた．
■効果
以上説明してきたように、この発明に係る金属製容器は
、耐レトルト性及びフレーバー性に優れており、特にレ
トルト殺菌後におけるフレーバー性が良好である．従っ
て、高温殺菌工程を必要とする内容物を収納する金属製
容器に適することは明らかである．1. Not a concern 3. A little bothersome 2. Hardly a concern 4. A concern As shown in Table 1, the metal container according to the present invention is coated. Analyzing the physical properties of epoxyphenol,
KM. It was found that the amount of 04 consumed was lower than that of conventional epoxy phenol, and the extraction resistance of the coating film was good. or,
No whitening phenomenon of the paint film was observed after retort treatment, and in the flavor test, results were obtained that the paint was superior to the pond coating paint. ■Effects As explained above, the metal container according to the present invention has excellent retort resistance and flavor properties, and particularly good flavor properties after retort sterilization. Therefore, it is clear that it is suitable for metal containers for storing contents that require a high temperature sterilization process.
Claims (1)
製造工程において触媒が介在しないで生成されたエポキ
シフェノールを、容器内面に被覆したことを特徴とする
金属製容器A metal container characterized in that the content of low molecular weight epoxy in the paint is small and the inner surface of the container is coated with epoxy phenol that is produced without the intervention of a catalyst in the paint manufacturing process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16490989A JP2673373B2 (en) | 1989-06-27 | 1989-06-27 | Metal container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16490989A JP2673373B2 (en) | 1989-06-27 | 1989-06-27 | Metal container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0329747A true JPH0329747A (en) | 1991-02-07 |
| JP2673373B2 JP2673373B2 (en) | 1997-11-05 |
Family
ID=15802168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16490989A Expired - Fee Related JP2673373B2 (en) | 1989-06-27 | 1989-06-27 | Metal container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2673373B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7926644B2 (en) | 2004-05-07 | 2011-04-19 | Magnemotion, Inc. | Three-dimensional motion using single-pathway based actuators |
| US9346371B2 (en) | 2009-01-23 | 2016-05-24 | Magnemotion, Inc. | Transport system powered by short block linear synchronous motors |
| JP2017160312A (en) * | 2016-03-09 | 2017-09-14 | 大和製罐株式会社 | Water-repellent coating, metal plate and metal container coated with the same, and method for forming water-repellent coating |
| US9771000B2 (en) | 2009-01-23 | 2017-09-26 | Magnemotion, Inc. | Short block linear synchronous motors and switching mechanisms |
| US9802507B2 (en) | 2013-09-21 | 2017-10-31 | Magnemotion, Inc. | Linear motor transport for packaging and other uses |
| JP2018038362A (en) * | 2016-09-09 | 2018-03-15 | 株式会社すなおネット | Food container and method of providing food container, and food product and method for providing food product |
| JP2018039575A (en) * | 2017-09-20 | 2018-03-15 | 株式会社すなおネット | Method for providing food container |
| JP6313893B1 (en) * | 2017-09-29 | 2018-04-18 | 株式会社すなおネット | Food product and manufacturing method thereof, and accessory and manufacturing method thereof |
-
1989
- 1989-06-27 JP JP16490989A patent/JP2673373B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7926644B2 (en) | 2004-05-07 | 2011-04-19 | Magnemotion, Inc. | Three-dimensional motion using single-pathway based actuators |
| US9346371B2 (en) | 2009-01-23 | 2016-05-24 | Magnemotion, Inc. | Transport system powered by short block linear synchronous motors |
| US9771000B2 (en) | 2009-01-23 | 2017-09-26 | Magnemotion, Inc. | Short block linear synchronous motors and switching mechanisms |
| US10112777B2 (en) | 2009-01-23 | 2018-10-30 | Magnemotion, Inc. | Transport system powered by short block linear synchronous motors |
| US9802507B2 (en) | 2013-09-21 | 2017-10-31 | Magnemotion, Inc. | Linear motor transport for packaging and other uses |
| JP2017160312A (en) * | 2016-03-09 | 2017-09-14 | 大和製罐株式会社 | Water-repellent coating, metal plate and metal container coated with the same, and method for forming water-repellent coating |
| JP2018038362A (en) * | 2016-09-09 | 2018-03-15 | 株式会社すなおネット | Food container and method of providing food container, and food product and method for providing food product |
| JP2018039575A (en) * | 2017-09-20 | 2018-03-15 | 株式会社すなおネット | Method for providing food container |
| JP6313893B1 (en) * | 2017-09-29 | 2018-04-18 | 株式会社すなおネット | Food product and manufacturing method thereof, and accessory and manufacturing method thereof |
| JP2019062770A (en) * | 2017-09-29 | 2019-04-25 | 株式会社すなおネット | Food product and production method thereof, and accessory and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2673373B2 (en) | 1997-11-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |