JPH1132742A - Antimicrobial film - Google Patents
Antimicrobial filmInfo
- Publication number
- JPH1132742A JPH1132742A JP19226797A JP19226797A JPH1132742A JP H1132742 A JPH1132742 A JP H1132742A JP 19226797 A JP19226797 A JP 19226797A JP 19226797 A JP19226797 A JP 19226797A JP H1132742 A JPH1132742 A JP H1132742A
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- JP
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- Prior art keywords
- chitosan
- film
- surfactant
- amount
- solution
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- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
- Packages (AREA)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、抗菌性を有するフ
ィルムに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film having antibacterial properties.
【０００２】[0002]
【従来の技術】キトサンは、蟹や海老の甲羅等に含まれ
るキチン質を、アルカリ中で加水分解して得られるアミ
ノ基を有するセルロース誘導体の一種である。食品添加
物に分類され、安全性にも優れている。キトサンは水に
は不溶であるが、酸性水溶液には溶解するため、酸性水
溶液に溶解したものをフィルム表面に塗布し、抗菌性を
付与する方法が検討されてきた。2. Description of the Related Art Chitosan is a type of cellulose derivative having an amino group, which is obtained by hydrolyzing chitin contained in crabs and shrimp shells in an alkali. It is classified as a food additive and has excellent safety. Chitosan is insoluble in water, but is soluble in acidic aqueous solutions. Therefore, a method of imparting antibacterial properties by applying a solution dissolved in an acidic aqueous solution to the film surface has been studied.
【０００３】しかしながら、キトサンは人畜に対する安
全性に優れるが、抗菌性は弱く、少量のキトサン溶液を
フィルム塗布しても、十分な抗菌性が得られないといっ
た問題点がある。このため、特公平１−５６７５４号公
報には、キトサンをキトサナーゼのような酵素により分
解した軽度分解物を、フィルムに付着する方法が開示さ
れている。また、特開平８−２２５６６８号公報には、
フィルム表面に遊離酸基を有するグラフト重合体膜を介
して、キトサン膜を形成する方法が開示されている。一
方、キトサンの抗菌性を高める目的で特開平７−１７３
３１２号公報、特開平８−２６８８２１号公報、特開平
９−４０５０２号公報等にはキトサンに銀、銅、亜鉛等
の抗菌作用を有する金属イオンを加えた抗菌剤組成物が
開示されている。[0003] However, chitosan is excellent in safety for humans and animals, but has weak antibacterial properties, and has a problem that even if a small amount of chitosan solution is applied to a film, sufficient antibacterial properties cannot be obtained. For this reason, Japanese Patent Publication No. 1-56754 discloses a method of attaching a slightly decomposed product obtained by decomposing chitosan with an enzyme such as chitosanase to a film. Also, JP-A-8-225668 discloses that
A method for forming a chitosan film via a graft polymer film having a free acid group on the film surface is disclosed. On the other hand, in order to enhance the antibacterial property of chitosan, JP-A-7-173 discloses
JP-A-312, JP-A-8-268821, JP-A-9-40502, and the like disclose an antibacterial agent composition obtained by adding a metal ion having an antibacterial action such as silver, copper, or zinc to chitosan.
【０００４】[0004]
【発明が解決しようとする課題】即ち、特公平１−５６
７５４号公報や特開平８−２２５６６８号公報の方法に
おいて、十分な抗菌力を得るためにはフィルム１平方メ
ートルあたり１００ｍｇ（１００ｍｇ／ｍ2 ）以上のキ
トサンを塗布する必要がある。このため、食品包装材と
して使用する際、このフィルム表面に多量塗布されたキ
トサン層のために、基材のフィルム本来の熱融着性が大
きく低下し、食品包装等におけるヒートシール工程や高
周波シール工程において、十分なシール強度が得られな
いといった問題点がある。部分的にキトサンを塗布する
方法もあるが工程が複雑となる。The problem to be solved by the present invention is as follows:
In the method disclosed in Japanese Patent No. 754 or JP-A-8-225668, it is necessary to apply 100 mg (100 mg / m 2 ) or more of chitosan per square meter of the film in order to obtain sufficient antibacterial activity. For this reason, when used as a food packaging material, a large amount of the chitosan layer applied to the surface of the film greatly reduces the inherent heat-fusibility of the base film, and the heat sealing step in food packaging and the like and the high-frequency sealing In the process, there is a problem that a sufficient sealing strength cannot be obtained. There is a method of partially applying chitosan, but the process becomes complicated.
【０００５】また、特開平７−１７３３１２号公報、特
開平８−２６８８２１号公報、特開平９−４０５０２号
公報等の金属イオンを加えた抗菌剤組成物では、添加し
た金属イオンによりフィルムの光照射時の変色や透明性
の低下が避けられず、食品等の包装時に、商品の外観不
良や内容物の正確な確認ができないといった問題があ
る。本発明は、キトサンの持つ抗菌性を最大限に発揮さ
せ、熱融着性等などの基材となるフィルム本来の物性低
下が少なく、さらに光照射時における変色や透明性の低
下などのない抗菌性フィルムを提供することを目的とす
る。In the antimicrobial composition containing a metal ion as disclosed in JP-A-7-17312, JP-A-8-268821 and JP-A-9-40502, the film is irradiated with light by the added metal ion. Discoloration at the time and a decrease in transparency are inevitable, and there is a problem that the appearance of the product is poor and the contents cannot be accurately confirmed when packaging the food or the like. The present invention exerts the antibacterial properties of chitosan to the maximum, reduces the deterioration of the physical properties of the film as a base material such as heat sealability, and further, does not cause discoloration or decrease in transparency upon light irradiation It is intended to provide a functional film.
【０００６】[0006]
【課題を解決するための手段】本発明者は、上記課題を
達成するために本発明をなすに至った。すなわち、本発
明は、キトサン水溶液が塗布されたフィルムにおいて、
少なくとも１種の界面活性剤を含有するキトサン水溶液
を用い、かつキトサンの塗布量が１〜７０ｍｇ／ｍ2で
あることを特徴とする抗菌フィルムである。本発明が従
来技術と最も相違するところは、従来技術がキトサン単
独またはキトサン軽度分解物を多量に用いる処方である
のに対し、本発明は少なくとも１種の界面活性剤と少量
のキトサンを用いることである。すなわち、上記従来技
術と相違するところの本発明の構成要件の役割は、少量
のキトサンで十分な抗菌効果を得ることである。Means for Solving the Problems The present inventors have accomplished the present invention to achieve the above object. That is, the present invention provides a film coated with an aqueous chitosan solution,
An antibacterial film characterized by using an aqueous chitosan solution containing at least one surfactant, and having a chitosan application amount of 1 to 70 mg / m 2 . The most different point of the present invention from the prior art is that the prior art is a formulation using chitosan alone or a large amount of chitosan mildly decomposed product, whereas the present invention uses at least one surfactant and a small amount of chitosan. It is. That is, the role of the constituent element of the present invention, which is different from the above-mentioned prior art, is to obtain a sufficient antibacterial effect with a small amount of chitosan.
【０００７】以下、本発明を説明する。本発明に使用す
るキトサンは、前述のようにキチンをアルカリ中で加水
分解し、キチン中に含まれるＮ−アセチル基からアセチ
ル基を脱離させることにより得られるが、この場合の脱
アセチル化率は７０％以上好ましくは８０〜９９％であ
る。キトサン水溶液はキトサンを希酸溶液に溶解させた
物であるが、酸は硝酸、塩酸等の無機酸および酢酸、乳
酸、クエン酸等の有機酸のいずれでもよいが、使用時の
変色、臭いを考慮すると乳酸、クエン酸が好ましい。キ
トサンを溶解する希酸溶液の酸濃度は、キトサンが溶解
する濃度でよく０．０１％〜２０％であるが、溶液粘度
を考慮すると０．０１％〜５％が好ましい。Hereinafter, the present invention will be described. The chitosan used in the present invention can be obtained by hydrolyzing chitin in an alkali as described above and removing an acetyl group from an N-acetyl group contained in the chitin. Is 70% or more, preferably 80 to 99%. The chitosan aqueous solution is obtained by dissolving chitosan in a dilute acid solution, and the acid may be any of inorganic acids such as nitric acid and hydrochloric acid and organic acids such as acetic acid, lactic acid, and citric acid. Considering this, lactic acid and citric acid are preferred. The acid concentration of the dilute acid solution in which chitosan is dissolved may be a concentration in which chitosan is dissolved, and is preferably 0.01% to 20%, but is preferably 0.01% to 5% in consideration of the solution viscosity.
【０００８】キトサン水溶液のフィルムへの塗布は、ス
プレー法、ディップ法などの方法で行われるが、より均
一に塗布できると言う点ではディップ法が好ましい。塗
布した後、オーブン等で熱風乾燥し水分を除去する。キ
トサンを塗布するフィルム表面は、予め塗布前に放電加
工による親水化処理や強酸化剤等、公知の表面処理をし
ておくこともできる。キトサンの塗布量は、１〜７０ｍ
ｇ／ｍ2 である必要があり、好ましくは３〜５０ｍｇ／
ｍ2 である。１ｍｇ／ｍ2 より少ないと十分な抗菌効果
は得られず、７０ｍｇ／ｍ2 より多いと熱融着性の低下
などの基材フィルムの本来の物性を大きく損なう。The application of the chitosan aqueous solution to the film is carried out by a method such as a spray method or a dipping method, but the dipping method is preferred in that the coating can be performed more uniformly. After the application, it is dried with hot air in an oven or the like to remove moisture. The surface of the film to which chitosan is applied may be previously subjected to a known surface treatment such as a hydrophilization treatment by electric discharge machining or a strong oxidizing agent before application. Chitosan coating amount is 1-70m
g / m 2 , preferably 3 to 50 mg / m 2.
m 2 . If the amount is less than 1 mg / m 2 , a sufficient antibacterial effect cannot be obtained, and if it is more than 70 mg / m 2 , the original physical properties of the base film, such as a decrease in heat fusion property, are greatly impaired.
【０００９】界面活性剤には、アニオン系、カチオン
系、両性系、非イオン系の中、キトサンの安全性を損な
わないために、アニオン系、非イオン系のものが好まし
い。アニオン系界面活性剤の好ましい具体例としては、
脂肪酸塩、アルキルスルホン酸塩等がある。非イオン系
界面活性剤としては、ポリビニルアルコール、ポリオキ
シエチレンアルキルエーテル、脂肪酸アミド等が上げら
れる。これらを少なくとも１種組み合わせて使用でき
る。Among the anionic, cationic, amphoteric and nonionic surfactants, anionic and nonionic surfactants are preferred in order not to impair the safety of chitosan. Preferred specific examples of the anionic surfactant include:
There are fatty acid salts and alkyl sulfonates. Examples of the nonionic surfactant include polyvinyl alcohol, polyoxyethylene alkyl ether, and fatty acid amide. These can be used in combination of at least one kind.
【００１０】界面活性剤の添加量は、キトサン水溶液当
たり０．００１ｗｔ％〜５ｗｔ％、好ましくは０．００
５ｗｔ％〜１ｗｔ％、である。０．００１ｗｔ％より少
ないものは、界面活性剤を添加しないものと同様に１〜
７０ｍｇ／ｍ2 のキトサンの塗布量で十分な抗菌効果を
得ることが難しい。十分な抗菌性を得るためにはさらに
塗布量を増す必要があり、結果的に、熱融着性の低下な
ど基材フィルムの本来の物性を大きく損なう。また、５
ｗｔ％以上では、フィルム塗布面のベタツキや巻き取り
時のフィルム同士のブロッキングが発生しやすくなる。[0010] The amount of the surfactant is 0.001 wt% to 5 wt%, preferably 0.001 wt%, based on the aqueous solution of chitosan.
5 wt% to 1 wt%. If the amount is less than 0.001 wt%, as in the case where no surfactant is added, 1 to
It is difficult to obtain a sufficient antibacterial effect with a coating amount of 70 mg / m 2 of chitosan. In order to obtain sufficient antibacterial properties, it is necessary to further increase the coating amount, and as a result, the original physical properties of the base film, such as a decrease in heat sealability, are greatly impaired. Also, 5
When the content is not less than wt%, stickiness of the film application surface and blocking between the films at the time of winding are likely to occur.
【００１１】本発明の基材となるフィルムは、従来公知
のフィルムであり、フィルムを形成する樹脂および製法
や厚みに限定されるものではない。樹脂としては、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、ポリ塩化ビニリデン等の熱可塑性樹脂や、ポリウ
レタン等の熱硬化性樹脂、セロファン等のセルロース再
生樹脂などであり、これらに離型剤、熱安定剤、紫外線
吸収剤、酸化防止剤、着色剤、可塑剤、オリゴマー、そ
の他慣用の添加剤を、本発明の効果を損なわない範囲で
添加し製膜したものである。The film serving as the substrate of the present invention is a conventionally known film, and is not limited to the resin forming the film, the manufacturing method, and the thickness. Examples of the resin include thermoplastic resins such as polyethylene, polypropylene, polystyrene, polyvinyl chloride, and polyvinylidene chloride; thermosetting resins such as polyurethane; and regenerated cellulose resins such as cellophane. A film is formed by adding an agent, an ultraviolet absorber, an antioxidant, a colorant, a plasticizer, an oligomer, and other conventional additives within a range that does not impair the effects of the present invention.
【００１２】[0012]
【発明の実施の形態】以下、実施例により本発明をより
詳細に説明する。なお、本発明における評価方法は以下
の通りである。 ［抗菌効果評価方法］ （１）供試菌 ・大腸菌（ＩＦＯ ３９７２） ・黄色ブドウ球菌（ＩＦＯ １２７３２） （２）試験用培地 ・ＮＡ培地：普通寒天培地「栄研化学（株）」 ・１／５００ＮＢ培地：肉エキスを０．２％添加した普
通ブイヨン培地「栄研化学（株）」を滅菌精製水で５０
０倍に希釈し、ｐＨを７．０±０．２に調整した。 ・ＳＣＤＬＰ培地：ＳＣＤＬＰ培地「日本製薬（株）」 ・ＳＡ培地：標準寒天培地「栄研化学（株）」 （３）菌液の調整 ＮＡ培地で３７±１℃、１６〜２４時間培養した試験菌
をＮＡ培地に再度接種して３７±１℃、１６〜２４時間
培養した菌体を１／５００培地ＮＢ培地に均一に分散さ
せ、１ミリリットルあたりの菌数が約１０5 個となるよ
うに調整した。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to examples. The evaluation method in the present invention is as follows. [Method for evaluating antibacterial effect] (1) Test bacteria-Escherichia coli (IFO 3972)-Staphylococcus aureus (IFO 12732) (2) Test medium-NA medium: Normal agar medium "Eiken Chemical Co., Ltd." 500NB medium: 50% normal broth medium "Eiken Chemical Co., Ltd."
After dilution by a factor of 0, the pH was adjusted to 7.0 ± 0.2. -SCDLP medium: SCDLP medium "Nippon Pharmaceutical Co., Ltd."-SA medium: Standard agar medium "Eiken Chemical Co., Ltd." (3) Preparation of bacterial solution Cultured in NA medium at 37 ± 1 ° C for 16 to 24 hours The bacteria were again inoculated into the NA medium and cultured at 37 ± 1 ° C. for 16 to 24 hours. The cells were uniformly dispersed in the 1/500 medium NB medium so that the number of bacteria per milliliter was about 10 5. It was adjusted.
【００１３】（４）試料の調整 試験フィルムを５ｃｍ×５ｃｍの大きさに切断し、これ
を試料とした。 （５）試験操作 試験面２５ｃｍ2 に対して０．５ミリリットルの割合で
菌液を滴下し、その上に滅菌ポリエチレンフィルムをか
ぶせ、密着させた。これらを３５±１℃、相対湿度９０
％の条件化で保存した。また、プラスチックシャーレを
対照試料として同様に試験した。(4) Preparation of Sample The test film was cut into a size of 5 cm × 5 cm and used as a sample. (5) Test operation Bacterial solution was dropped at a rate of 0.5 ml on a test surface of 25 cm 2 , and a sterile polyethylene film was covered thereon and brought into close contact therewith. These are 35 ± 1 ° C. and 90% relative humidity.
Stored under% conditions. In addition, a plastic petri dish was similarly tested as a control sample.
【００１４】（６）生菌数の測定 保存２４時間後に、ＳＣＤＬＰ培地１０ミリリットルで
試料から生残菌を洗い出し、この洗い出し液の生残菌数
をＳＡ培地を用いた寒天平板培養法（３５℃で２日間培
養）により生残菌数を測定し、試験面１枚当たりの生残
菌数に換算した。 ［熱融着性］以下の条件で、キトサン塗布面同士を熱融
着させ、熱融着面の１８０°の角度で引張剥離強度を測
定した。 （熱融着条件） ・使用機器：テスター産業（株）製ＴＰー７０１ ・シール巾：巾５ｍｍ、長さ３０ｃｍ ・シール温度：ポリスチレンフィルム１８０℃、ポリプ
ロピレンフィルム１８０℃ ・シール時間：１秒 ・シール圧力：２ｋｇ／ｃｍ2 （引張剥離強度） ・使用機器：オリエンテック（株）製ＲＴＣ−１２１０ ・引張速度：１０ｍｍ／ｍｉｎ ・測定温度、湿度：２３℃、５５％ＲＴ また、実施例、比較例におけるキトサン水溶液の調合に
あたっては、表１に示す界面活性剤およびキトサン溶液
を使用した。また、基材となるフィルムは表２に示す物
を用いた。(6) Measurement of viable cell count After 24 hours of storage, surviving cells were washed out from the sample with 10 ml of SCDLP medium, and the number of surviving cells in the washed liquid was measured by an agar plate culture method using SA medium (35 ° C.). The cells were cultured for 2 days), and the number of surviving bacteria was measured and converted into the number of surviving bacteria per test surface. [Heat Fusion Property] Under the following conditions, the chitosan-coated surfaces were thermally fused to each other, and the tensile peel strength was measured at an angle of 180 ° with respect to the heat fusion surface. (Heat fusion conditions)-Equipment used: TP-701 manufactured by Tester Sangyo Co., Ltd.-Seal width: width 5 mm, length 30 cm-Seal temperature: polystyrene film 180 ° C, polypropylene film 180 ° C-Seal time: 1 second-Seal Pressure: 2 kg / cm 2 (tensile peel strength)-Equipment used: RTC-1210 manufactured by Orientec Co.-Tensile speed: 10 mm / min-Measurement temperature, humidity: 23 ° C, 55% RT Further, Examples and Comparative Examples In preparing the chitosan aqueous solution in Table 1, the surfactant and the chitosan solution shown in Table 1 were used. Moreover, the thing shown in Table 2 was used for the film used as a base material.
【００１５】[0015]
【表１】 [Table 1]
【００１６】[0016]
【表２】 [Table 2]
【００１７】[0017]
【実施例１〜４および比較例１〜３】実施例１〜４およ
び比較例１〜３はキトサン水溶液への界面活性剤の添加
と抗菌性の関係を調べたものである。表３に示すように
キトサン水溶液に界面活性剤、水を加え調合し、キトサ
ンが規定量になるようにフィルム表面に塗布し、熱風乾
燥機により１００℃、２０秒で乾燥した。乾燥フィルム
について、抗菌性評価を本文記載の評価法に従い実施
し、その結果を表４に示した。Examples 1-4 and Comparative Examples 1-3 Examples 1-4 and Comparative Examples 1-3 investigate the relationship between the addition of a surfactant to an aqueous chitosan solution and the antibacterial properties. As shown in Table 3, a surfactant and water were added to the chitosan aqueous solution to prepare a mixture, and the mixture was applied to the film surface so that the chitosan was in a specified amount, and dried at 100 ° C. for 20 seconds using a hot air drier. The antibacterial property of the dried film was evaluated according to the evaluation method described in the text, and the results are shown in Table 4.
【００１８】表３の実施例１〜４は、キトサン水溶液に
界面活性剤を添加し、キトサン塗布量が１〜７０ｍｇ／
ｍ2 となるように塗布したものである。比較例１、２、
３は界面活性剤を添加しないものである。表４の対照１
〜３（対照１：ＯＰＳフイルム、対照２：パイレンフイ
ルム、対照３：ＣＬマルケンフイルム）はキトサンを塗
布する前の基材フィルムの生菌残数を示したものである
が、これに対してキトサン水溶液に界面活性剤を添加し
たものは、キトサン塗布量が１〜７０ｍｇ／ｍ2 で十分
な抗菌性（生菌残数１０以下）を有することがわかる。
ただ、界面活性剤を添加しないものは、キトサン塗布量
が１〜７０ｍｇ／ｍ2 では十分な抗菌性は得られていな
い。In Examples 1 to 4 in Table 3, a surfactant was added to an aqueous chitosan solution, and the coating amount of chitosan was 1 to 70 mg /
m 2 . Comparative Examples 1, 2,
No. 3 does not add a surfactant. Control 1 in Table 4
-3 (Control 1: OPS film, Control 2: Pyrene film, Control 3: CL Marken film) indicate the number of viable cells remaining on the base film before the application of chitosan. It can be seen that the solution obtained by adding the surfactant to the aqueous solution has a sufficient antibacterial property (the number of viable bacteria remaining is 10 or less) at a chitosan application amount of 1 to 70 mg / m 2 .
However, when no surfactant is added, sufficient antibacterial properties are not obtained at a chitosan application amount of 1 to 70 mg / m 2 .
【００１９】[0019]
【表３】 [Table 3]
【００２０】[0020]
【表４】 [Table 4]
【００２１】[0021]
【実施例５〜８および比較例５〜７】実施例５〜８およ
び比較例５〜７はキトサンのフィルム塗布量と抗菌性、
熱融着の関係を調べたものである。表５の実施例５〜８
は、キトサン水溶液に界面活性剤を添加し、キトサン塗
布量が１〜７０ｍｇ／ｍ2 となるように塗布したもので
ある。比較例５は界面活性剤を添加したが、キトサン塗
布量が０．５ｍｇ／ｍ2 のものである。比較例６は界面
活性剤を添加し、キトサンを８０ｍｇ／ｍ2 塗布したも
のである。比較例７は界面活性剤を添加せず、キトサン
を１００ｍｇ／ｍ2 塗布したものである。Examples 5 to 8 and Comparative Examples 5 to 7 Examples 5 to 8 and Comparative Examples 5 to 7 show the film coating amount of chitosan and the antibacterial property,
It is an examination of the relationship of heat fusion. Examples 5 to 8 in Table 5
Is a solution obtained by adding a surfactant to an aqueous solution of chitosan and applying the solution so that the coating amount of chitosan is 1 to 70 mg / m 2 . In Comparative Example 5, a surfactant was added, but the amount of chitosan applied was 0.5 mg / m 2 . In Comparative Example 6, a surfactant was added and chitosan was applied at 80 mg / m 2 . In Comparative Example 7, 100 mg / m 2 of chitosan was applied without adding a surfactant.
【００２２】表６の結果より、キトサン水溶液に界面活
性剤を添加し、かつキトサン塗布量が１〜７０ｍｇ／ｍ
2 のもの（実施例５〜８）は十分な抗菌性と共に、対照
１〜２（対照１：ＯＰＳフイルム、対照２：パイレンフ
イルム）に示す基材フィルムに較べ、熱融着性がほとん
ど低下していないことがわかる。比較例６のキトサン塗
布量８０ｍｇ／ｍ2 のものは、十分な抗菌性は得られて
いるが、キトサンの多量塗布による熱融着性の低下が見
られる。比較例７の界面活性剤を添加しないものは、キ
トサン塗布量１００ｍｇ／ｍ2 で十分な抗菌性が得られ
たものの、熱融着性の大幅な低下が見られる。以上の結
果より、キトサン水溶液に界面活性剤を添加し、かつ特
定量のキトサンを塗布したものは、十分な抗菌効果を有
し、かつ熱融着性などの基材フィルムの本来の物性を損
なわないことがわかる。From the results shown in Table 6, the surfactant was added to the chitosan aqueous solution, and the amount of chitosan applied was 1 to 70 mg / m 2.
2 of those with (Examples 5-8) are sufficient antimicrobial, control 1-2 (Control 1: OPS film, Control 2: Pylen Film) compared to the base film shown in, heat-welding is most reduced You can see that it is not. In the case of the chitosan coating amount of 80 mg / m 2 in Comparative Example 6, although sufficient antibacterial properties were obtained, a decrease in the heat-fusibility due to the application of a large amount of chitosan was observed. In Comparative Example 7 in which the surfactant was not added, a sufficient antibacterial property was obtained at a coating amount of chitosan of 100 mg / m 2 , but a significant decrease in heat-fusibility was observed. From the above results, those obtained by adding a surfactant to a chitosan aqueous solution and applying a specific amount of chitosan have a sufficient antibacterial effect, and impair the original physical properties of the base film such as heat sealability. It turns out there is no.
【００２３】[0023]
【表５】 [Table 5]
【００２４】[0024]
【表６】 [Table 6]
【００２５】[0025]
【発明の効果】本発明により得られたフィルムは、十分
な抗菌性を有し、基材フィルムの本来の物性を維持して
いるため、食品包装材料、食品用容器、医療用包装材等
に用いることができる。さらに、樹脂、金属、紙等の層
と積層することで抗菌成形品として利用することも可能
である。The film obtained by the present invention has sufficient antibacterial properties and maintains the original physical properties of the base film, so that it can be used for food packaging materials, food containers, medical packaging materials, etc. Can be used. Furthermore, it can be used as an antibacterial molded product by laminating it with a layer of resin, metal, paper, or the like.
Claims (2)
おいて、少なくとも１種の界面活性剤を含有するキトサ
ン水溶液を用い、かつキトサンの塗布量が１〜７０ｍｇ
／ｍ2 であることを特徴とする抗菌フィルム。1. A film coated with an aqueous solution of chitosan, wherein an aqueous solution of chitosan containing at least one surfactant is used, and the amount of chitosan applied is 1 to 70 mg.
/ M 2 .
ン系界面活性剤であることを特徴とする請求項１記載の
抗菌フィルム。2. The antibacterial film according to claim 1, wherein the surfactant is an anionic or nonionic surfactant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19226797A JPH1132742A (en) | 1997-07-17 | 1997-07-17 | Antimicrobial film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19226797A JPH1132742A (en) | 1997-07-17 | 1997-07-17 | Antimicrobial film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1132742A true JPH1132742A (en) | 1999-02-09 |
Family
ID=16288446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19226797A Pending JPH1132742A (en) | 1997-07-17 | 1997-07-17 | Antimicrobial film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1132742A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1732399A2 (en) * | 2004-03-18 | 2006-12-20 | The State of Oregon acting by and through The State Board of Higher Education on behalf of Oregon State University | Lysozyme-chitosan films |
-
1997
- 1997-07-17 JP JP19226797A patent/JPH1132742A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1732399A2 (en) * | 2004-03-18 | 2006-12-20 | The State of Oregon acting by and through The State Board of Higher Education on behalf of Oregon State University | Lysozyme-chitosan films |
| EP1732399A4 (en) * | 2004-03-18 | 2008-06-25 | Oregon State | Lysozyme-chitosan films |
| AU2005223622B2 (en) * | 2004-03-18 | 2010-05-27 | State Of Oregon Acting By And Through The State Board Of Higher Education On Behalf Of Oregon State University | Lysozyme-chitosan films |
| AU2005223622B8 (en) * | 2004-03-18 | 2011-01-13 | State Of Oregon Acting By And Through The State Board Of Higher Education On Behalf Of Oregon State University | Lysozyme-chitosan films |
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