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JP4283367B2 - Food fermentation film - Google Patents
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JP4283367B2 - Food fermentation film - Google Patents

Food fermentation film Download PDF

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Publication number
JP4283367B2
JP4283367B2 JP5795899A JP5795899A JP4283367B2 JP 4283367 B2 JP4283367 B2 JP 4283367B2 JP 5795899 A JP5795899 A JP 5795899A JP 5795899 A JP5795899 A JP 5795899A JP 4283367 B2 JP4283367 B2 JP 4283367B2
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Prior art keywords
film
fermentation
food
moisture permeability
food fermentation
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JP2000245433A (en
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親嗣 杉山
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日本パック株式会社
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Description

【0001】
【発明の属する技術分野】
本発明は食品発酵用フィルムに関する。更に詳しくは、透湿度は良好であるが孔を有さないフィルムと孔を有するフィルムとを貼り合わせるか、又は部分的に非通気性のコ−テイングを設けることにより、発酵速度を調節できる食品発酵用フィルムに関する。
【0002】
【従来の技術】
従来発酵食品の1種である納豆を製造する場合、納豆は発酵させた後、紙製或いはポリエチレンやポリスチレン等のプラスチック製の容器に入れられ、市場に出荷されている。近年において食品衛生面から小型容器に蒸煮大豆を入れ蓋をした状態で発酵させて納豆を製造し、そのままの状態で市場に出荷される方式が一般的になった。製造直後の納豆は水分を多く含み該水分を容器外に放出する必要性、並びに発酵をさせるため容器外から酸素を取り入れる必要性の観点から、蓋材には通気性と透湿性が求められ、通常、微細な孔が多数設けられた多孔質のプラスチックフィルム、特にポリエチレンフィルムが使用されている。
しかしながら、従来の容器入り納豆は、蓋材に微細な孔が開けられているため、微細な塵埃または微細な昆虫等が入り込む危険性があった。
【0003】
【発明が解決しようとする課題】
本発明は、上記した従来技術の欠点を除くために為されたものであり、その目的とするところは、トップシ−ル、シ−ト、または袋として食品の発酵が円滑に行われると共に食品の発酵速度を調節することができ、且つ微細な塵埃または昆虫の侵入を完全に防止できる孔のない食品発酵用フィルムを提供することにある。麹による味噌、漬物、魚の粕漬け、または麹及び納豆菌による納豆の製造の様な発酵用菌は好気性であり、酸素の供給及び炭酸ガスの排出といった空気の流通を必要とする。このため、従来はフィルムに微細な孔または切込みを入れることにより麹菌または納豆菌の活動を促進させていた。しかしながら、そのような手段では微細な塵埃または微細な昆虫が混入する恐れがあるため、本発明においてはそれ等の孔を必要としない食品発酵用フィルムを提供することを目的とする。
【0004】
ポリオレフィンフィルム等の肉厚は使用するものにより決めると良い。中でもポリエチレンフィルムは肉薄にもかかわらず、その引裂強度は強く、湿気により破れることもなく、しかもポリエチレンフィルムの酸素透過率は5,000〜10,000cc/m2 ・24hr、炭酸ガス透過率は16,000cc/m2 ・24hrもあり、食品発酵用フィルムとして好気性発酵用菌の発酵に最適と思われたが、実際には全く発酵が進行しない。
発明者等は種々検討した結果、ポリエチレンフィルムは酸素及び炭酸ガスは良く透過させるが、透湿度は余り良好ではなく結果として湿気が通気孔を閉塞させてしまうため発酵が進行しないものと考えられる。一方、透湿度の良好なフィルムは湿度ばかりでなく、酸素及び炭酸ガスも十分に透過させるフィルムであることに着目し本発明を完成させたものである。
【0005】
【課題を解決するための手段】
即ち、本発明に係る食品発酵用フィルムは、穿孔または切込みの孔がなく、透湿度が300〜4000g/m・24hrのフィルムの片面または両面に油性インキ或いはシリコン樹脂を印刷または表面加工処理して非通気性コーティングを部分的に設けることにより発酵速度を調節することができ、トップシール、シートまたは袋として使用できることを特徴とする。また、前記透湿度が300〜4000g/m2・24hrのフィルムがセロファン、紙、多孔質フィルムまたは樹脂布地を熱延したフィルムであることを特徴とし、更に、前記貼り合わせは熱による接着または接着剤による接着であることを特徴とする。
【0006】
【発明の実施の形態】
図1は本発明の食品発酵用フィルムを蓋材として用いた納豆容器の斜視図、図2は本発明の食品発酵用フィルムを袋状容器とした平面図、図3乃至図6は本発明の食品発酵用フィルムの断面図の例を示す。
図において、符号1は食品発酵用フィルム、1aは透湿度が300〜4000g/m2 ・24hrのフィルム(以下、透湿性フィルムという)、1bはポリエチレンフィルム、1cは融着又は接着部、1dは非通気性コ−テイング(以下、コ−テイングという)、2は孔、2aは非コ−テイング部、3は容器を示す。
【0007】
本発明に係る食品発酵用フィルムは、図1に示すように発酵用食品を容器に入れ、その蓋体として、また、図2に示すように発酵食品を包む袋状として用いることができる。その場合袋の周囲に融着又は接着部1cを設けることにより簡単に袋状にすることができる。
【0008】
本発明に用いられる食品発酵用フィルム1の断面図は、図3乃至図6に示すように、透湿性フィルム1aの片面または両面に部分的にコ−テイング1dを設けるか、又は、透湿性フィルム1aと円形又は多角形状の孔2を適宜数有するポリエチレンフィルム1bとを貼り合わせたフィルムであり、貼り合わせは熱による接着または接着剤により接着されたフィルムである。
【0009】
透湿性フィルム1aとしては、セロファン、紙、多孔質フィルムまたは樹脂布地を熱延したフィルムが好適に使用することができる。更に透湿性フィルムとして半透膜も使用することができる。セロファンには普通のセロファンであるPTと、防湿性のセロファンMSTがあるが、透湿性の良好な肉厚25μの普通のセロファンPTが使用できる。セロファンPTの透湿度は表1に示すごとく1,000〜2,000g/m2 24hrで比較的大きな値を示すが、酸素透過率は10〜1,000g/m2 24hrであり、炭酸ガス透過率は40〜4,000g/m2 24hrであり比較的小さな値を示すものが多い。発酵食品の1種である納豆につき発酵試験した結果では、セロファンフィルム単独では発酵が進み過ぎる傾向があり、流通市場において長期間品質を維持させることは難しいと考えられる。更に、不都合な点としては、セロファンの透湿度は良好であるが、セロファン自体は湿気に弱く、フィルム強度が低下し弛む性質を有することである。そのような場合、もっと肉厚のセロファンフィルムを用いるか、又は透湿度の比較的小さな、孔開きポリエチレンフィルムを貼り合わせるか、又は透湿性フィルム1aの表面或は裏面に部分的にコ−テイング1dを設けることにより強度の改善及び発酵速度の調節を行うことができる。
【0010】
【表1】

Figure 0004283367
【0011】
透湿度は良好であるが、湿気に弱い材質としては紙も同様であり、もっと肉厚の紙を用いて強度を増加させ、透湿度の調整にはコ−テイング1dを部分的に設けるか、又は適宜通気孔を有する樹脂フィルムと貼り合わせて強度を増加させると共に透湿度を調整し発酵速度を調整する必要がある。
【0012】
コ−テイング1dとしては、非通気性であれば良いが、透湿性フィルム1aの強度を増加できるものであれば更に良く、油性インキ或はシリコン樹脂等を印刷することによりコ−テイング1dを設けることができる。多孔質フィルムは酸素、炭酸ガス、アンモニアガスを透過させる多孔質フィルムであり、NY不織布との複合化により機能アップしたカイロ用通気性フィルムである。表1に示すように肉厚50μ以上のフィルムであるが透湿度は良好で、600〜1200g/ m2 ・24hrを有するフィルムである。
【0013】
また、樹脂布地を熱延したフィルムは、熱延により樹脂布地の一部が溶融し、布地の目を完全に閉塞した孔のないフィルムであり、このような処理をすることにより通気度の向上を図った製品であり、このフィルムを用いて納豆の発酵試験を行った結果において良好な成績をあげたフィルムである。
【0014】
前記透湿度の良好なフィルムと貼り合わせて強度を増加させるために用いられるフィルムとしては、ポリエチレン、ポリプロピレン、ポリスチレン、ポリ塩化ビニル、ポリエステル、ナイロン、ポリ塩化ビニリデン、ポリビニルアルコ−ル等を挙げることがでいるが、中でもポリエチレンは一般的である。
ポリエチレンフィルムとしては、表1に示すように高圧のLDPEと中低圧のHDPEとがあり、両者とも酸素透過率及び炭酸ガス透過率は良好であるが、透湿度は低く15〜45g/m2 24hr程度であり、納豆発酵試験においてこのフィルム単独で用いた場合には発酵が殆ど進行しなかったフィルムであるが、このフィルムに円形または多角形状の孔を開け、前記透湿度の良好なフィルムと貼り合わせて用いることにより透湿度の良好なフィルムの補強及び孔の面積の調節を行うことができ、発酵速度の調節を行うことができる。
【0015】
【発明の効果】
(1)本発明の食品発酵用フィルムは透湿度300〜4000g/m2・24hrの孔のないフィルムを用いるため、微小な塵埃及び昆虫の侵入を完全に防ぐことができ極めて衛生的であると共に、食品の発酵を進行させることができる。
(2)また、本発明の食品発酵用フィルムは円形、多角形、または好みの形状の孔を有する樹脂フィルムとを貼り合わせているため、強度的に丈夫である。
(3)更に、本発明の食品発酵用フィルムは円形、多角形、または好みの形状の孔を有する樹脂フィルムとを貼り合わせるか、又は、コ−テイングにより、孔の面積を調節し発酵の進行速度を調節することができるため、市場における賞味期間の延長を図ることができる。
(4)また、本発明の食品発酵用フィルムを納豆容器の蓋体として用いた場合には、納豆表面のネバネバを適当に抑えることができ、納豆表面のネバネバ付着防止用に必要であったセパレ−ト紙を省略することもできる。
【図面の簡単な説明】
【図1】本発明の食品発酵用フィルムを蓋材として用いた納豆容器の斜視図。
【図2】本発明の食品発酵用フィルムを袋状とした平面図。
【図3】本発明の食品発酵用フィルムの断面図の一例。
【図4】本発明の食品発酵用フィルムの断面図の一例。
【図5】本発明の食品発酵用フィルムの断面図の一例。
【図6】本発明の食品発酵用フィルムの断面図の一例。
【符号の説明】
1 食品発酵用フィルム
1a 透湿度が300〜4000g/m2 /24hrのフィルム
1b ポリエチレンフィルム
1c 融着又は接着部
1d 非通気性コ−テイング
2 孔
2a 非コ−テイング部
3 容器[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a food fermentation film. More specifically, a food that can adjust the fermentation rate by adhering a film having good moisture permeability but not having a hole and a film having a hole, or by providing a partially non-breathable coating. It relates to a film for fermentation.
[0002]
[Prior art]
In the case of producing natto, which is one type of conventional fermented foods, natto is fermented and then placed in paper or plastic containers such as polyethylene and polystyrene and shipped to the market. In recent years, from the viewpoint of food hygiene, it has become common to produce natto by fermenting steamed soybeans in a small container with a lid, and then shipping it to the market as it is. From the viewpoint of the necessity of releasing a large amount of moisture out of the container and natto immediately after production, as well as the necessity of incorporating oxygen from outside the container for fermentation, the lid material is required to have air permeability and moisture permeability. Usually, a porous plastic film provided with many fine pores, particularly a polyethylene film is used.
However, the conventional natto in a container has a risk that fine dust, fine insects, or the like may enter because the cover material has fine holes.
[0003]
[Problems to be solved by the invention]
The present invention has been made to eliminate the above-mentioned drawbacks of the prior art, and the object of the present invention is to facilitate the fermentation of food as a top seal, a sheet, or a bag, and to improve the quality of food. An object of the present invention is to provide a film for food fermentation without pores, which can adjust the fermentation rate and can completely prevent the entry of fine dust or insects. Fermentative fungi, such as miso with pickles, pickles, pickled fish, or natto production with straw and natto bacteria, are aerobic and require air circulation such as supply of oxygen and discharge of carbon dioxide. For this reason, conventionally, the activity of Aspergillus or Bacillus natto has been promoted by making fine holes or cuts in the film. However, since there is a possibility that fine dust or fine insects may be mixed by such means, the object of the present invention is to provide a film for food fermentation that does not require such holes.
[0004]
The thickness of the polyolefin film or the like may be determined depending on what is used. Among them, although the polyethylene film is thin, its tear strength is strong, it is not broken by moisture, and the oxygen permeability of the polyethylene film is 5,000 to 10,000 cc / m 2 · 24 hr, and the carbon dioxide permeability is 16, 000 cc / m2 · 24 hr, which seemed to be optimal for fermentation of aerobic fermentation bacteria as a film for food fermentation, but in reality, fermentation does not proceed at all.
As a result of various investigations by the inventors, the polyethylene film allows oxygen and carbon dioxide gas to permeate well, but the moisture permeability is not so good, and as a result, the moisture blocks the ventilation holes, so that the fermentation does not proceed. On the other hand, the present invention has been completed by paying attention to the fact that a film having a good moisture permeability is a film that sufficiently transmits not only humidity but also oxygen and carbon dioxide.
[0005]
[Means for Solving the Problems]
That is, the film for food fermentation according to the present invention does not have a hole for perforation or cutting, and is printed or surface-treated with oil-based ink or silicon resin on one or both sides of a film having a moisture permeability of 300 to 4000 g / m 2 · 24 hr. The fermentation rate can be adjusted by partially providing a non-breathable coating and can be used as a top seal, sheet or bag. The film having a moisture permeability of 300 to 4000 g / m 2 · 24 hr is a film obtained by hot-rolling cellophane, paper, a porous film, or a resin fabric, and the bonding is performed by heat bonding or an adhesive. It is characterized by adhesion by.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a perspective view of a natto container using the food fermentation film of the present invention as a lid, FIG. 2 is a plan view of the food fermentation film of the present invention as a bag-shaped container, and FIGS. The example of sectional drawing of the film for food fermentation is shown.
In the figure, reference numeral 1 is a film for food fermentation, 1a is a film having a moisture permeability of 300 to 4000 g / m 2 · 24 hr (hereinafter referred to as a moisture permeable film), 1b is a polyethylene film, 1c is a fused or bonded part, and 1d is not. Breathable coating (hereinafter referred to as coating), 2 is a hole, 2a is a non-coated portion, and 3 is a container.
[0007]
The film for food fermentation according to the present invention can be used as a lid for putting a food for fermentation into a container as shown in FIG. 1 and as a bag for wrapping the fermented food as shown in FIG. In that case, it can be made into a bag shape easily by providing the melt | fusion or the adhesion part 1c around a bag.
[0008]
As shown in FIGS. 3 to 6, the sectional view of the food fermentation film 1 used in the present invention is partially provided with a coating 1d on one side or both sides of the moisture permeable film 1a, or the moisture permeable film. 1a and a polyethylene film 1b having an appropriate number of circular or polygonal holes 2 are bonded together, and the bonding is a film bonded by heat or an adhesive.
[0009]
As the moisture permeable film 1a, a cellophane, paper, a porous film, or a film obtained by hot rolling a resin cloth can be suitably used. Furthermore, a semipermeable membrane can also be used as a moisture permeable film. Cellophane includes normal cellophane PT and moisture-proof cellophane MST, but normal cellophane PT having a thickness of 25 μm and good moisture permeability can be used. The moisture permeability of cellophane PT is 1,000 to 2,000 g / m2 24 hr as shown in Table 1, but the oxygen permeability is 10 to 1,000 g / m2 24 hr, and the carbon dioxide permeability is Many of them are 40 to 4,000 g / m 2 24 hr and show relatively small values. As a result of a fermentation test for natto, which is one type of fermented food, cellophane film alone tends to promote fermentation too much, and it is considered difficult to maintain quality for a long time in the distribution market. Furthermore, the disadvantage is that the cellophane has good moisture permeability, but the cellophane itself is vulnerable to moisture, and has the property that the film strength decreases and loosens. In such a case, a thicker cellophane film is used, or a perforated polyethylene film having a relatively low moisture permeability is laminated, or a partially coated 1d on the front or back surface of the moisture-permeable film 1a. The strength can be improved and the fermentation rate can be adjusted.
[0010]
[Table 1]
Figure 0004283367
[0011]
Although moisture permeability is good, paper is the same as a material that is weak to moisture, and the thickness is increased by using thicker paper, and the coating 1d is partially provided for adjusting the moisture permeability, Alternatively, it is necessary to adjust the fermentation rate by adjusting the moisture permeability as well as increasing the strength by laminating with a resin film having a vent hole as appropriate.
[0012]
The coating 1d may be non-breathable, but may be better if it can increase the strength of the moisture permeable film 1a. The coating 1d is provided by printing oil-based ink or silicone resin. be able to. The porous film is a porous film that allows oxygen, carbon dioxide gas, and ammonia gas to pass therethrough, and is an air-permeable film for warmers that has been improved in function by being combined with a NY nonwoven fabric. As shown in Table 1, it is a film having a wall thickness of 50 μm or more, but has a good moisture permeability and a film having 600 to 1200 g / m 2 · 24 hr.
[0013]
In addition, a film in which a resin fabric is hot-rolled is a film without a hole in which a part of the resin fabric is melted by hot-rolling and the eyes of the fabric are completely closed. By such treatment, the air permeability is improved. It is a product that achieved good results in the results of fermenting tests of natto using this film.
[0014]
Examples of the film used for increasing the strength by bonding with the film having good moisture permeability include polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyester, nylon, polyvinylidene chloride, polyvinyl alcohol, and the like. However, among them, polyethylene is common.
As shown in Table 1, the polyethylene film includes high-pressure LDPE and medium-low pressure HDPE, both of which have good oxygen permeability and carbon dioxide permeability, but have low moisture permeability and about 15 to 45 g / m2 24 hr. In the natto fermentation test, when this film is used alone, the fermentation hardly progressed, but a circular or polygonal hole was opened in this film and bonded to the film with good moisture permeability. By using it, the film with good moisture permeability can be reinforced and the area of the pores can be adjusted, and the fermentation rate can be adjusted.
[0015]
【The invention's effect】
(1) Since the film for food fermentation of the present invention uses a film having a moisture permeability of 300 to 4000 g / m 2 · 24 hr, it can completely prevent fine dust and insects from entering, and is extremely hygienic, The fermentation of food can be advanced.
(2) Moreover, since the film for food fermentation of this invention has bonded together the resin film which has a hole of circular, polygonal, or favorite shape, it is strong in strength.
(3) Furthermore, the film for food fermentation of the present invention is bonded to a resin film having a hole having a circular shape, a polygonal shape, or a favorite shape, or is adjusted by coating to adjust the area of the hole and progress of fermentation. Since the speed can be adjusted, the shelf life in the market can be extended.
(4) In addition, when the food fermentation film of the present invention is used as a lid of a natto container, the stickiness on the natto surface can be appropriately suppressed, and it is necessary to prevent stickiness on the natto surface. -The paper can be omitted.
[Brief description of the drawings]
FIG. 1 is a perspective view of a natto container using a food fermentation film of the present invention as a lid.
FIG. 2 is a plan view of the food fermentation film of the present invention in the form of a bag.
FIG. 3 is an example of a cross-sectional view of a food fermentation film of the present invention.
FIG. 4 is an example of a cross-sectional view of a food fermentation film of the present invention.
FIG. 5 is an example of a cross-sectional view of a food fermentation film of the present invention.
FIG. 6 is an example of a cross-sectional view of the food fermentation film of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Film for food fermentation 1a Film 1b with moisture permeability of 300 to 4000 g / m2 / 24 hr Polyethylene film 1c Fusion or adhesion part 1d Non-breathable coating 2 Hole 2a Non-coating part 3 Container

Claims (2)

穿孔または切込みの孔がなく、透湿度が300〜4000g/m・24hrのフィルムの片面または両面に油性インキ或いはシリコン樹脂を印刷または表面加工処理して非通気性コーティングを部分的に設けることにより発酵速度を調節することができ、トップシール、シートまたは袋として使用できることを特徴とする食品発酵用フィルム。By partially providing a non-breathable coating by printing or surface-treating oil-based ink or silicone resin on one or both sides of a film having no perforation or notching and a moisture permeability of 300 to 4000 g / m 2 · 24 hr A film for food fermentation, which can adjust a fermentation rate and can be used as a top seal, a sheet or a bag. 前記透湿度が300〜4000g/m・24hrのフィルムがセロファン、半透膜、紙、多孔質フィルムまたは樹脂布地を熱延したフィルムである請求項1に記載の食品発酵用フィルム。The film for food fermentation according to claim 1, wherein the film having a moisture permeability of 300 to 4000 g / m 2 · 24 hr is a film obtained by hot-rolling cellophane, a semipermeable membrane, paper, a porous film, or a resin fabric.
JP5795899A 1999-03-05 1999-03-05 Food fermentation film Expired - Lifetime JP4283367B2 (en)

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JP5795899A JP4283367B2 (en) 1999-03-05 1999-03-05 Food fermentation film

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JP2000245433A JP2000245433A (en) 2000-09-12
JP4283367B2 true JP4283367B2 (en) 2009-06-24

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KR200458968Y1 (en) * 2011-09-21 2012-03-21 임경환 A seal cap structure for packing container

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