JP4375950B2 - Disinfectant composition - Google Patents

Disinfectant composition Download PDF

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JP4375950B2
JP4375950B2 JP2002206444A JP2002206444A JP4375950B2 JP 4375950 B2 JP4375950 B2 JP 4375950B2 JP 2002206444 A JP2002206444 A JP 2002206444A JP 2002206444 A JP2002206444 A JP 2002206444A JP 4375950 B2 JP4375950 B2 JP 4375950B2
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Prior art keywords
peracetic acid
food packaging
composition
disinfectant composition
bottle
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JP2004043411A (en
Inventor
かつ子 平栗
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Nippon Peroxide Co Ltd
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Nippon Peroxide Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、ポリエチレンテレフタレート製包装材料等の食品包装材料の殺菌などに使用することができる殺菌剤組成物に関する。
【0002】
【従来の技術】
ポリエチレンテレフタレート製包装材料、特にポリエチレンテレフタレートボトル(ペットボトル)の工業的な殺菌方法には、熱間充填法、無菌充填法等がある。
熱間充填法は、充填内容物をUHT(ultra-high temperature)で殺菌後、容器に85〜87℃で充填する方式であり、汚染指標菌としては製造工程や容器由来の細菌芽胞が挙げられる。一方、無菌充填法は、充填内容物をUHTで殺菌後、無菌環境下(NASA規格クラス100)で薬剤殺菌した容器に充填する方式であり、汚染指標菌としては薬剤耐性のカビや細菌芽胞がある。
この無菌充填法において、包装材料を殺菌する薬剤として、過酸化水素、オゾン、過酢酸等の過酸化物系化合物、塩素、次亜塩素酸ソーダ等の塩素系化合物等が知られている。これらのうち、過酢酸は、低濃度でも殺菌力が強いこと、速効性があること、及び抗菌スペクトルが広く、細菌芽胞、カビ、酵母等にも優れた効果を示すこと、等から広く使用されている。
【0003】
アルミニウム缶やスチール缶、或いはガラス瓶のように内容物を嫌気状態に保てるものにはカビ、細菌芽胞等の発生はないが、そのもの自体に通気性があるペットボトルの場合には長期保存に対して嫌気の状態を維持出来ず、ケトミウムのようなカビ類やバチルスのような好気性芽胞菌が発生するおそれがある。
このような菌種が食品加工工程で発生しないようにするためには、薬液の濃度や温度を上げるか又は処理時間を長くする必要がある。
しかしながら、薬液の濃度を高めると、過酢酸、過酸化水素、酢酸等の処理薬液が殺菌洗浄後の食品包装材料に付着、残留しやすくなるという問題があり、また、温度を上げると、ペットボトルの場合には、材質上、熱によって変形するおそれがあるので、耐熱性の包装材料を用いなければならないという問題がある。
このような問題点を解決する方法として、特開平10−323385号公報には、過酢酸等の過酸化物を用いて殺菌する工程と、デシルジメチルアンモニウムクロライドを用いて殺菌する工程とを組み合わせる二段階殺菌方法が開示されているが、この方法は、二種類の薬剤の相加効果を狙ったものに過ぎない。
本発明者は、過酢酸水溶液の殺菌力を増強することができれば、実質的に低い濃度の過酢酸で前記問題点を解消できることに着目し、鋭意検討を重ねた。
【0004】
【発明が解決しようとする課題】
本発明の目的は、過酢酸水溶液の殺菌力を増強することができる物質を見出し、実質的に低い濃度の過酢酸でどんな場合でも、殺菌条件や装置、設備等を変更することなく安定して殺菌が行える(食品包装材料用)殺菌剤組成物を提供することである。
【0005】
【課題を解決するための手段】
本発明者等は、上記目的を達成するために鋭意検討を重ねた結果、過酢酸、過酸化水素及び酢酸を含む水溶液に特定の化合物を添加すると、過酢酸水溶液の殺菌力を高めることができる(相乗効果が得られる)ことを見出し、本発明を完成した。
【0006】
すなわち、本発明は、下記成分(1)及び(2)を含有すること、を特徴とする殺菌剤組成物であり、ポリエチレンテレフタレート製食品包装材料等の食品包装材料の殺菌などに用いることができる。
(1)過酢酸、過酸化水素及び酢酸を含む水溶液。
(2)次の一般式で示される、1種又は2種以上の化合物。(以下、「過酢酸殺菌力向上剤」という)
【化2】

Figure 0004375950
(式中、R1は、C1〜C9のアルキル基(但し、tert−ブチル基を除く)、ハロゲン基、フェニル基フェニル基、アルコキシ基、又はフェノキシ基を示し、R2、R3は水素、C1〜C9のアルキル基(但し、tert−ブチル基を除く)、ハロゲン基を示す。)
【0007】
【発明の実施の形態】
以下、本発明を詳しく説明する。
本発明の殺菌剤組成物は、予め調製された、過酢酸、過酸化水素及び酢酸を含む水溶液に、所定量の過酢酸殺菌力向上剤を添加することによって調製することができる。すなわち、本発明の殺菌剤組成物は、予め調製された、過酢酸、過酸化水素及び酢酸を含む水溶液を、所定の過酢酸濃度になるように希釈した後、所定量の過酢酸殺菌力向上剤を添加することによって調製することが好ましい。このようにして調製した場合には、そのまま殺菌工程に使用することができる濃度とすることができる。
【0008】
本発明における前記(2)の化合物(過酢酸殺菌力向上剤)は、具体的には、O−、m−またはp−クレゾール、O−、m−またはp−エチルフェノール、O−、m−またはp−プロピルフェノール、O−、m−またはp−n−ブチルフェノール、O−、m−またはp−アミルフェノール、2,4−キシレノール、2,6−キシレノール、O−、m−またはp−クロロフェノール、4−クロロ−3,5−ジメチルフェノール、O−、m−またはp−フェニルフェノール、メトキシ−、エトキシ−、プロポキシ−、ブトキシ−、ペンチルオキシ−、ヘキシルオキシ−、またはフェノキシ−フェノール等であり、O−、m−またはp−エチルフェノール、O−、m−またはp−プロピルフェノール、O−、m−またはp−n−ブチルフェノール、O−、m−またはp−アミルフェノール、2,4−キシレノール、2,6−キシレノール、O−、m−またはp−クロロフェノール等は過酢酸の殺菌力を向上させる能力が大きいため好ましい。
【0009】
殺菌工程に用いられる殺菌剤組成物の各成分の濃度は、好ましくは、過酢酸は1000〜4000ppm、過酸化水素は1500〜30000ppm、酢酸は2000〜30000ppm、及び過酢酸殺菌力向上剤は1000〜10000ppmである。過酢酸殺菌力向上剤は、懸濁状態で用いることもできる。
上記組成の殺菌剤組成物の殺菌効果は薬液の温度が高いほど増すが、食品包装材料等に付着している或いは発生するカビや耐熱性芽胞菌に対しても40〜65℃で充分な殺菌能が得られる。
【0010】
本発明の殺菌剤組成物は、食品包装材料、特に、ポリエチレンテレフタレートボトルのようなポリエチレンテレフタレート製包装材料の殺菌に好適であり、例えば、次のように行うことができる。
(1)ペットボトルの外面に本発明の殺菌剤組成物を噴霧し、外洗する。
(2)その後、ペットボトル内に40〜65℃の殺菌剤組成物を噴霧、若しくは満注してボトル内を殺菌する。
(3)殺菌剤組成物を排出させた後、ペットボトル内外に付着した該殺菌剤組成物を洗い落とすため、滅菌水で水洗する。
【0011】
本発明の殺菌剤組成物は、また食品の充填機、食品輸送のコンベア、食品貯蔵タンク、パイプライン、或いは食品加工作業場の天井または床等の殺菌にも用いることができる。
【0012】
【実施例】
以下、実施例により、本発明を更に具体的に説明する。
実施例1
〔試験液の調製〕
(a)過酢酸水溶液の調製
過酢酸4重量%、過酸化水素16重量%及び酢酸15重量%を含有する平衡過酢酸溶液5gに水道水95gを加え、攪拌して均一な水溶液を調製した。この水溶液の過酢酸濃度は2000ppmである。
(b)殺菌力試験供試液の調製
(a)で調製した過酢酸水溶液に、表1に示した過酢酸殺菌力向上剤を所定量添加し、攪拌して均一な溶液を得た。
【0013】
〔殺菌力の試験方法〕
前記で調製した供試液を、三角フラスコに100ml取り、40℃に保った。そこに接種菌数4×106 CFU/mlのケトミウム胞子液を1ml接種し、10秒、20秒、30秒、60秒及び120秒毎に三角フラスコから1mlづつを採取し、直ちに還元性物質である亜硫酸ナトリウムを基剤とした不活性化剤9mlの中に入れ、過酢酸の殺菌活性を停止させた。その後、それを適宜希釈してポテトデキストロース寒天培地を用いた平板混釈培養法により生残菌数を測定し、殺菌力の目安であるD値(菌数を1/10に減少させるのに要する時間(単位:分))を求めた。なお、D値が小さいほど、殺菌力は強い。
その結果を表1に示す。
【0014】
【表1】
Figure 0004375950
【0015】
実施例2
実施例1の実験No.7と同じ組成の殺菌剤組成物の供試液(過酢酸濃度:2000ppm、p−エチルフェノール濃度:4000ppm)を調製した。コンベアで運ばれてきたペットボトルの外面に、40℃に加温された該殺菌剤組成物の供試液を噴霧し、ボトル外面を殺菌洗浄(外洗)した。外洗したボトルを、殺菌トンネルと呼ばれる殺菌室にコンベアで移送し、そこでボトル内に前記40℃に加温された殺菌剤組成物の供試液を満注して、該ボトル内を2分間殺菌処理した。ボトルを下向きに反転させ該殺菌剤組成物の供試液を排出させた後、ボトル内外に滅菌水を噴霧してボトル内外面に付着している殺菌剤組成物の供試液を洗い落とした。その後、該ボトルに緑茶を充填し、滅菌したキャップを閉め、30℃で14日間放置したが、カビ等の発生は認められなかった。
【0016】
【発明の効果】
以上説明した通り、本発明の食品包装材料用殺菌剤組成物は、過酢酸水溶液の殺菌力が増強されており、実質的に低い濃度の過酢酸で、且つ低い温度で、従来死滅しにくいとされていた菌種を殺菌することができる。そのため、ポリエチレンテレフタレートボトルなどの食品包装材料や食品用の種々の装置、機器類などの殺菌に好適に使用することができる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disinfectant composition that can be used for sterilizing food packaging materials such as polyethylene terephthalate packaging materials.
[0002]
[Prior art]
Industrial sterilization methods for polyethylene terephthalate packaging materials, particularly polyethylene terephthalate bottles (pet bottles) include hot filling methods and aseptic filling methods.
The hot filling method is a method in which the filled contents are sterilized by UHT (ultra-high temperature) and then filled into the container at 85 to 87 ° C., and the contamination indicator bacteria include bacterial spore derived from the production process and the container. . On the other hand, the aseptic filling method is a method in which the filled contents are sterilized with UHT and then filled into a container sterilized with chemicals in a sterile environment (NASA standard class 100). is there.
In this aseptic filling method, peroxide compounds such as hydrogen peroxide, ozone and peracetic acid, and chlorine compounds such as chlorine and sodium hypochlorite are known as agents for sterilizing packaging materials. Among these, peracetic acid is widely used because it has a strong bactericidal activity even at low concentrations, has a rapid action, has a wide antibacterial spectrum, and exhibits excellent effects on bacterial spores, fungi, yeast, etc. ing.
[0003]
Molds, bacterial spores, etc. are not generated in aluminum bottles, steel cans, or glass bottles that can keep the contents in anaerobic condition, but in the case of plastic bottles that are breathable themselves, Anaerobic conditions cannot be maintained, and molds such as ketium and aerobic spore bacteria such as Bacillus may be generated.
In order to prevent such bacterial species from being generated in the food processing step, it is necessary to increase the concentration and temperature of the chemical solution or lengthen the treatment time.
However, when the concentration of the chemical solution is increased, there is a problem that treatment chemical solutions such as peracetic acid, hydrogen peroxide, and acetic acid tend to adhere to and remain on the food packaging material after sterilization and cleaning. In this case, the material may be deformed by heat, so that there is a problem that a heat-resistant packaging material must be used.
As a method for solving such a problem, Japanese Patent Application Laid-Open No. 10-323385 discloses a method of combining a step of sterilizing with a peroxide such as peracetic acid and a step of sterilizing with decyldimethylammonium chloride. Although a staged sterilization method is disclosed, this method is only aimed at the additive effect of two types of drugs.
The present inventor has intensively studied paying attention to the fact that if the sterilizing power of the peracetic acid aqueous solution can be enhanced, the above-mentioned problem can be solved with a substantially low concentration of peracetic acid.
[0004]
[Problems to be solved by the invention]
The object of the present invention is to find a substance capable of enhancing the sterilizing power of an aqueous solution of peracetic acid, and stably in any case at a substantially low concentration of peracetic acid without changing the sterilization conditions, equipment, equipment, etc. It is providing the bactericide composition (for food packaging materials) which can sterilize.
[0005]
[Means for Solving the Problems]
As a result of intensive studies to achieve the above object, the present inventors can increase the bactericidal power of an aqueous solution of peracetic acid when a specific compound is added to the aqueous solution containing peracetic acid, hydrogen peroxide and acetic acid. The present invention was completed by finding that (a synergistic effect can be obtained).
[0006]
That is, the present invention is a fungicide composition characterized by containing the following components (1) and (2), and can be used for sterilization of food packaging materials such as polyethylene terephthalate food packaging materials. .
(1) An aqueous solution containing peracetic acid, hydrogen peroxide and acetic acid.
(2) One or more compounds represented by the following general formula. (Hereinafter referred to as “peracetic acid sterilizing power improver”)
[Chemical formula 2]
Figure 0004375950
(Wherein R1 represents a C1 to C9 alkyl group (excluding tert-butyl group), a halogen group, a phenyl group, an alkoxy group, or a phenoxy group, R2 and R3 are hydrogen, C1 to C9; An alkyl group (excluding tert-butyl group) and a halogen group.)
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail.
The bactericidal composition of the present invention can be prepared by adding a predetermined amount of a peracetic acid bactericidal power improver to a preliminarily prepared aqueous solution containing peracetic acid, hydrogen peroxide and acetic acid. That is, the disinfectant composition of the present invention improves the disinfecting power of peracetic acid by diluting a prepared aqueous solution containing peracetic acid, hydrogen peroxide and acetic acid to a predetermined peracetic acid concentration. It is preferable to prepare by adding an agent. When prepared in this way, the concentration can be used as it is in the sterilization step.
[0008]
Specifically, the compound (2) (peracetic acid bactericidal activity improver) in the present invention is O-, m- or p-cresol, O-, m- or p-ethylphenol, O-, m-. Or p-propylphenol, O-, m- or pn-butylphenol, O-, m- or p-amylphenol, 2,4-xylenol, 2,6-xylenol, O-, m- or p-chloro Phenol, 4-chloro-3,5-dimethylphenol, O-, m- or p-phenylphenol, methoxy-, ethoxy-, propoxy-, butoxy-, pentyloxy-, hexyloxy-, phenoxy-phenol, etc. Yes, O-, m- or p-ethylphenol, O-, m- or p-propylphenol, O-, m- or pn-butylphenol, O-, m- P-Amylphenol, 2,4-xylenol, 2,6-xylenol, O-, m- or p-chlorophenol are preferred because of their high ability to improve the bactericidal activity of peracetic acid.
[0009]
The concentration of each component of the sterilizing composition used in the sterilizing step is preferably 1000 to 4000 ppm for peracetic acid, 1500 to 30000 ppm for hydrogen peroxide, 2000 to 30000 ppm for acetic acid, and 1000 to 3000 for the peracetic acid sterilizing power improver. 10,000 ppm. The peracetic acid sterilizing power improver can also be used in a suspended state.
The bactericidal effect of the bactericide composition having the above composition increases as the temperature of the chemical solution increases. However, it can be sufficiently sterilized at 40 to 65 ° C. against mold and heat-resistant spore bacteria adhering to or generated in food packaging materials. Performance.
[0010]
The disinfectant composition of the present invention is suitable for disinfecting food packaging materials, particularly polyethylene terephthalate packaging materials such as polyethylene terephthalate bottles, and can be performed, for example, as follows.
(1) The disinfectant composition of the present invention is sprayed on the outer surface of a plastic bottle and washed outside.
(2) Then, the inside of a bottle is sterilized by spraying or filling a 40-65 degreeC disinfectant composition in a PET bottle.
(3) After discharging the bactericidal composition, in order to wash off the bactericidal composition adhering to the inside and outside of the PET bottle, it is washed with sterilized water.
[0011]
The disinfectant composition of the present invention can also be used for sterilization of food filling machines, food transport conveyors, food storage tanks, pipelines, or ceilings or floors of food processing workplaces.
[0012]
【Example】
Hereinafter, the present invention will be described more specifically with reference to examples.
Example 1
(Preparation of test solution)
(A) Preparation of aqueous peracetic acid solution 95 g of tap water was added to 5 g of an equilibrium peracetic acid solution containing 4% by weight of peracetic acid, 16% by weight of hydrogen peroxide and 15% by weight of acetic acid, and stirred to prepare a uniform aqueous solution. The concentration of peracetic acid in this aqueous solution is 2000 ppm.
(B) Preparation of test solution for bactericidal power test A predetermined amount of the peracetic acid bactericidal power improver shown in Table 1 was added to the peracetic acid aqueous solution prepared in (a) and stirred to obtain a uniform solution.
[0013]
[Test method for bactericidal activity]
100 ml of the test solution prepared above was placed in an Erlenmeyer flask and kept at 40 ° C. 1 ml of ketospore spore solution with 4 x 10 6 CFU / ml inoculum was inoculated there, and 1 ml was collected every 10 seconds, 20 seconds, 30 seconds, 60 seconds and 120 seconds, and immediately reduced substance Was put into 9 ml of an inactivating agent based on sodium sulfite to stop the bactericidal activity of peracetic acid. Thereafter, it is appropriately diluted and the number of surviving bacteria is measured by a plate pour culture method using a potato dextrose agar medium. The D value (necessary for reducing the number of bacteria to 1/10) is a measure of bactericidal activity. Time (unit: minutes) was obtained. The smaller the D value, the stronger the sterilizing power.
The results are shown in Table 1.
[0014]
[Table 1]
Figure 0004375950
[0015]
Example 2
Experiment No. 1 of Example 1 A test solution (peracetic acid concentration: 2000 ppm, p-ethylphenol concentration: 4000 ppm) having the same composition as 7 was prepared. A test liquid of the bactericide composition heated to 40 ° C. was sprayed on the outer surface of the PET bottle carried by the conveyor, and the outer surface of the bottle was sterilized and washed (outside washing). The washed bottle is transferred to a sterilization chamber called a sterilization tunnel by a conveyor, where the bottle is filled with the test solution of the bactericide composition heated to 40 ° C., and the bottle is sterilized for 2 minutes. Processed. The bottle was turned downward and the test solution of the bactericide composition was discharged, and then the sterilized water was sprayed inside and outside the bottle to wash away the test solution of the bactericide composition adhering to the inner and outer surfaces of the bottle. Thereafter, the bottle was filled with green tea, the sterilized cap was closed, and the bottle was allowed to stand at 30 ° C. for 14 days, but no generation of mold or the like was observed.
[0016]
【The invention's effect】
As described above, the disinfectant composition for food packaging material according to the present invention has enhanced bactericidal power of an aqueous solution of peracetic acid, and has a substantially low concentration of peracetic acid. It is possible to sterilize the bacterial species that have been used. Therefore, it can be suitably used for sterilization of food packaging materials such as polyethylene terephthalate bottles and various devices and equipment for food.

Claims (3)

下記成分(1)及び(2)を含有すること、を特徴とする殺菌剤組成物。
(1)過酢酸、過酸化水素及び酢酸を含む水溶液。
(2)o−エチルフェノール、m−エチルフェノール、p−エチルフェノール、p−プロピルフェノール、p−n−ブチルフェノール、p−n−アミルフェノール、p−n−アミルオキシフェノール、2,4−キシレノール及びp−クロロフェノールから選択される1種又は2種以上の化合物。
A fungicide composition comprising the following components (1) and (2):
(1) An aqueous solution containing peracetic acid, hydrogen peroxide and acetic acid.
(2) o-ethylphenol, m-ethylphenol, p-ethylphenol, p-propylphenol, pn-butylphenol, pn-amylphenol, pn-amyloxyphenol, 2,4-xylenol and One or more compounds selected from p-chlorophenol.
食品包装材料の殺菌に使用するための、請求項1記載の殺菌剤組成物。  The disinfectant composition according to claim 1, for use in disinfecting food packaging materials. 前記食品包装材料が、ポリエチレンテレフタレート製食品包装材料である、請求項2記載の殺菌剤組成物。  The disinfectant composition according to claim 2, wherein the food packaging material is a food packaging material made of polyethylene terephthalate.
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