JP2552375B2 - Method for producing biodegradable film - Google Patents
Method for producing biodegradable filmInfo
- Publication number
- JP2552375B2 JP2552375B2 JP2788290A JP2788290A JP2552375B2 JP 2552375 B2 JP2552375 B2 JP 2552375B2 JP 2788290 A JP2788290 A JP 2788290A JP 2788290 A JP2788290 A JP 2788290A JP 2552375 B2 JP2552375 B2 JP 2552375B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- film
- biodegradable film
- plant fiber
- biodegradable
- 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 - Lifetime
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Landscapes
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Paper (AREA)
- Wrappers (AREA)
- General Preparation And Processing Of Foods (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は、おから等の水不溶性の植物繊維を用いて
生分解性フィルムを製造する生分解性フィルムの製造方
法に関するものである。TECHNICAL FIELD The present invention relates to a method for producing a biodegradable film, which comprises producing a biodegradable film using water-insoluble plant fibers such as okara.
［従来技術及びその問題点］ 従来、食物等を包装するフィルムとしては、塩化ビニ
ル等の合成樹脂製のフィルムが一般に使用されていた。[Prior Art and its Problems] Conventionally, as a film for packaging food or the like, a synthetic resin film such as vinyl chloride has been generally used.
しかし、このように食物等を合成樹脂製のフィルムで
包装した場合、包装された食物等を食するにあたって
は、その都度、合成樹脂製のフィルムを破って、食物等
を取り出さなければならないという面倒があり、また残
った合成樹脂製のフィルムの処理も問題となっていた。However, when food is packaged with a synthetic resin film in this way, each time the packaged food is eaten, the synthetic resin film must be broken and the food taken out. In addition, the processing of the remaining synthetic resin film was also a problem.
一方、近年においては、蛋白や糖等で構成された様々
な可食性の生分解性フィルムが開発され、このような可
食性の生分解性フィルムで食物等を包装し、このように
包装された食物等をそのままの状態で食するようにした
り、食物等を包装した生分解性フィルムを湯等で溶かし
て食べるようにすることが考えられた。On the other hand, in recent years, various edible biodegradable films composed of proteins, sugars, etc. have been developed, and foods and the like are packaged with such edible biodegradable films and packaged in this way. It was considered that the food or the like should be eaten as it is, or that the biodegradable film in which the food or the like was packaged should be melted in hot water or the like before eating.
しかし、従来における可食性の生分解性フィルムは、
一般に薄膜で十分な強度をもつものが少なく、またヒー
トシールができなかったりして、食物等をうまく包装す
ることができないものが多かった。However, conventional edible biodegradable films are
In general, there are few thin films that have sufficient strength, and many of them are not able to wrap food well because they cannot be heat-sealed.
また、プルランフィルムのように薄膜で十分な強度を
もち、ヒートシールもできる可食性の生分解性フィルム
も存在したが、このような生分解性フィルムの場合に
は、製造コストが高く付くという問題があった。There was also an edible biodegradable film that was thin and had sufficient strength, such as pullulan film, and could be heat-sealed.However, in the case of such a biodegradable film, the manufacturing cost is high. was there.
［発明が解決しようとする課題］ この発明は、上記のような事情に鑑みてなされたもの
であり、薄膜で十分な強度をもち、ヒートシールを行う
こともでき、さらに製造コストも安くて済む生分解性フ
ィルムの製造方法を提供することを課題とするものであ
る。[Problems to be Solved by the Invention] The present invention has been made in view of the above circumstances and has a sufficient strength with a thin film, can be heat-sealed, and can be manufactured at low cost. It is an object to provide a method for producing a biodegradable film.
［課題を解決するための手段及び作用］ この発明においては、上記のような課題を解決するた
め、生分解性フィルムを製造するにあたり、水不溶性の
植物繊維を加水分解させて得られた分解物を用いて成膜
を行うようにしたのである。[Means and Actions for Solving the Problems] In the present invention, in order to solve the above problems, in producing a biodegradable film, a hydrolyzed product obtained by hydrolyzing water-insoluble plant fiber The film was formed by using.
ここで、水不溶性の植物繊維を上記のように加水分解
させずに、ホモゲナイザー等を用いて微細化させ、この
ように微細化させたものを成膜させて、生分解性フィル
ムを製造することも可能であるが、このようにして製造
された生分解性フィルムは、水等によって簡単に崩壊さ
れる一方、膜の強度が弱く、ヒートシールも行えなかっ
た。Here, without hydrolyzing the water-insoluble plant fiber as described above, it is micronized using a homogenizer, etc., and the micronized product is formed into a film to produce a biodegradable film. Although the biodegradable film thus produced can be easily disintegrated by water or the like, the strength of the film is weak and heat sealing cannot be performed.
これに対し、この発明のように水不溶性の植物繊維を
加水分解させると、水不溶性の植物繊維が分解されて水
溶性の植物繊維が得られ、このように加水分解されたも
のを成膜させた場合には、この水溶性の植物繊維が結着
材として作用し、薄膜でも十分な強度をもつようになる
と共に、ヒートシールも行えるようになる。On the other hand, when the water-insoluble plant fiber is hydrolyzed as in the present invention, the water-insoluble plant fiber is decomposed to obtain a water-soluble plant fiber, and the thus hydrolyzed plant fiber is formed into a film. In this case, the water-soluble vegetable fiber acts as a binder, and even a thin film has sufficient strength, and heat sealing can be performed.
また、上記のように水不溶性の植物繊維を加水分解さ
せて得られた分解物中における水溶性画分、すなわち、
水溶性の植物繊維を多く含む部分を分離させ、このよう
に水溶性の植物繊維を多く含む水溶性画分を成膜させた
場合には、より薄膜の強度が高く、不純物が少なくて透
明な生分解性フィルムが得られるようになる。Further, the water-soluble fraction in the hydrolyzate obtained by hydrolyzing the water-insoluble plant fiber as described above, that is,
When the water-soluble plant fiber-rich portion is separated and the water-soluble fraction containing a large amount of water-soluble plant fiber is formed into a film, the strength of the thin film is higher, and the amount of impurities is small and the film is transparent. A biodegradable film can be obtained.
さらに、上記の水溶性画分の中における高分子画分を
分離させ、この高分子画分を用いて成膜させた場合に
は、長期にわたって変色することのない透明な生分解性
フィルムが得られるようになる。Furthermore, when the polymer fraction in the above water-soluble fraction is separated and a film is formed using this polymer fraction, a transparent biodegradable film that does not discolor over a long period of time is obtained. Will be available.
ここで、水不溶性の植物繊維としては、おから等の大
豆等の豆類の水不溶性成分 、米糠，ふすま，コーン等
の穀類の水不溶性成分、芋類，野菜類，果物等の植物由
来の水不溶性成分等を用いることができるが、なかで
も、安定して入手できる点において、おからを用いるよ
うにすることが好ましい。Here, water-insoluble plant fibers include water-insoluble components of beans such as soybeans such as okara, water-insoluble components of cereals such as rice bran, bran, and corn, water derived from plants such as potatoes, vegetables, and fruits. Although insoluble components and the like can be used, it is preferable to use okara because of the stable availability.
また、おから等のように植物繊維原料が皮やへそ等を
含む場合、これらが混在すると、色調や風味等が悪くな
るため、皮やへそ等を除いたものを用いるようにするこ
とが好ましい。Further, when the plant fiber raw material contains skins, navels, etc., such as okara, it is preferable to use those without skins, navels, etc., if these are mixed, the color tone, flavor, etc. deteriorate. .
そして、上記のような水不溶性の植物繊維を加水分解
させるにあたっては、酸分解，アルカリ分解，セルラー
ゼやガラクトシダーゼ等を用いた酵素分解若しくはこれ
らを組合せて行うことができる。When hydrolyzing the above-mentioned water-insoluble plant fiber, it can be carried out by acid decomposition, alkali decomposition, enzymatic decomposition using cellulase, galactosidase or the like, or a combination thereof.
ここで、上記の水不溶性の植物繊維がおからのように
蛋白を含有するものである場合、上記の加水分解の条件
によっては、水不溶性の植物繊維と一緒に蛋白も分解さ
れ、これが水溶性の植物繊維と一緒に溶出されて、白濁
したり、褐変したりすることがある。Here, when the water-insoluble plant fiber contains a protein such as okara, depending on the above hydrolysis conditions, the protein is also decomposed together with the water-insoluble plant fiber, which is water-soluble. May be clouded or browned when it is eluted together with other plant fibers.
このため、おからのように蛋白を含有する水不溶性の
植物繊維を用いて透明な生分解性フィルムを得る場合に
は、上記の加水分解を行う前に、水不溶性の植物繊維に
含有される蛋白を先に分解させて除去させるようにした
り、蛋白を含有する水不溶性の植物繊維を、含有される
蛋白の等電点近くの酸性下で加水分解させるようにし、
含有される蛋白を凝集させて蛋白の分解を抑制させて、
水不溶性の植物繊維を選択的に分解させると共に、凝集
された蛋白を除去させるようにする。Therefore, when a transparent biodegradable film is obtained using a water-insoluble plant fiber containing protein such as okara, it is contained in the water-insoluble plant fiber before the above hydrolysis. The protein is first decomposed and removed, or the water-insoluble plant fiber containing the protein is hydrolyzed under acidic conditions near the isoelectric point of the contained protein,
The contained protein is aggregated to suppress the degradation of protein,
The water-insoluble plant fiber is selectively decomposed and the aggregated protein is removed.
また、上記のように水不溶性の植物繊維を加水分解さ
せるにあたって、加水分解の程度が低過ぎると、水不溶
性の植物繊維が残り、これを成膜させた場合には、得ら
れた生分解性フィルムが脆くて強度の弱いものになり、
また加水分解の程度を高くし過ぎた場合にも、植物繊維
が分解され過ぎて、得られた生分解性フィルムの強度が
低くなる。Further, in hydrolyzing the water-insoluble plant fiber as described above, if the degree of hydrolysis is too low, the water-insoluble plant fiber remains, and when it is formed into a film, the biodegradability obtained is The film becomes brittle and weak,
Also, when the degree of hydrolysis is too high, the plant fibers are too decomposed and the strength of the obtained biodegradable film becomes low.
このため、強度の高い生分解性フィルムを製造するに
あたっては、水不溶性の植物繊維をある程度の段階まで
加水分解させるようにし、また、生分解性フィルムの用
途に応じて、加水分解の程度を適当に定めるようにす
る。Therefore, in producing a high-strength biodegradable film, the water-insoluble plant fiber should be hydrolyzed to some extent, and the degree of hydrolysis should be adjusted according to the application of the biodegradable film. As specified in.
そして、上記のように水不溶性の植物繊維を加水分解
して得られた分解物を成膜させるにあたっては、公知の
成膜方法を使用することができ、例えば、上記の加水分
解物を、プレートや樹脂膜等の上に適当な厚みになるよ
うに引き伸ばし、これを乾燥させて、生分解性フィルム
を製造することができる。Then, in forming a film of the hydrolyzate obtained by hydrolyzing the water-insoluble plant fiber as described above, a known film forming method can be used. A biodegradable film can be produced by stretching it on a resin film or the like so as to have an appropriate thickness, and drying it.
また、このようにして製造される生分解性フィルムを
より均質化させるにあたっては、加水分解前における水
不溶性の植物繊維や、加水分解後における分解物を、ホ
モゲナイザー等を用いて処理し、微細化させるようにす
る。Further, in further homogenizing the biodegradable film produced in this manner, water-insoluble plant fibers before hydrolysis and hydrolyzed products are treated with a homogenizer or the like to be micronized. I will let you.
さらに、生分解性フィルムの特性を改良するために、
可塑剤や界面活性剤等の添加剤を加えることも可能であ
り、この場合には、上記生分解性フィルムの可食性を損
なわない添加剤を用いるようにすることが好ましい。Furthermore, in order to improve the properties of the biodegradable film,
It is also possible to add additives such as a plasticizer and a surfactant, and in this case, it is preferable to use an additive that does not impair the edibility of the biodegradable film.
［実施例］ 以下、この発明の実施例に係る生分解性フィルムの製
造方法を具体的に説明する。[Example] Hereinafter, a method for producing a biodegradable film according to an example of the present invention will be specifically described.
（実施例１） この実施例のものにおいては、水不溶性の植物繊維と
して、脱脂大豆から分離大豆蛋白を製造する工程におい
て得られた生おからを使用するようにした。(Example 1) In this example, raw okara obtained in the step of producing isolated soybean protein from defatted soybean was used as the water-insoluble plant fiber.
ここで、この生おからの場合、水分が約80重量％含ま
れており、また固形分においては、植物繊維が約65重量
％，粗蛋白が約20重量％含まれていた。Here, in the case of this raw okara, the water content was about 80% by weight, and the solid content was about 65% by weight of vegetable fiber and about 20% by weight of crude protein.
そして、この生おからに水を加えて、乾燥固形分濃度
が約５重量％になるように調整し、高圧ホモゲナイザー
（MANTON−GAULIN（株）製「Sub−Micron−disperse
r」）を用いて、これを200kg/cm2の圧力で２回均質化さ
せた。Then, water was added to the raw okara to adjust the dry solid content concentration to about 5% by weight, and a high-pressure homogenizer (manufactured by MANTON-GAULIN Co., Ltd., "Sub-Micron-disperse") was used.
This was homogenized twice with a pressure of 200 kg / cm 2 .
次に、このようにして均質化させたものに等重量の水
を加えて攪拌させた後、E/S比が1/100となるようにAspe
rgillus Oryzae由来のプロテアーゼ（力価240pu/mg）を
加え、生おから中に含まれる蛋白を50℃で３時間分解さ
せた。なお、プロテアーゼの力価は、萩原−Anson法に
準じて測定した値である。Next, after adding an equal weight of water to the homogenized product and stirring it, the Aspe was adjusted so that the E / S ratio was 1/100.
Protease derived from rgillus Oryzae (titer: 240 pu / mg) was added, and the protein contained in raw okara was decomposed at 50 ° C. for 3 hours. The titer of protease is a value measured according to the Hagiwara-Anson method.
そして、このように蛋白を分解させたものを8000rpm
で30分間遠心分解させて、可溶化した蛋白を除去し、残
った沈殿画分に水を加えて、固形分濃度が約４重量％に
なるように調整した後、これに濃度36％の塩酸を加えて
pH1に調整し、50℃で６時間かけて分解を行い、水不溶
性の植物繊維を水溶性の植物繊維に分解させた。Then, the protein decomposed in this way is 8000 rpm
Centrifuge for 30 minutes to remove the solubilized protein, add water to the remaining precipitation fraction to adjust the solids concentration to about 4% by weight, and add hydrochloric acid with a concentration of 36% to it. In addition
The pH was adjusted to 1 and the decomposition was carried out at 50 ° C. for 6 hours to decompose the water-insoluble plant fibers into water-soluble plant fibers.
その後、このように水不溶性の植物繊維を水溶性の植
物繊維二分解されたものに、10％の水酸化ナトリウム溶
液を加えてpH7.0になるように中和させ、ペースト状の
分解物を得た。After that, the water-insoluble plant fiber was decomposed into two water-soluble plant fibers, neutralized to a pH of 7.0 by adding 10% sodium hydroxide solution, and the paste-like decomposed product was added. Obtained.
そして、このようにして得たペースト状の分解物を、
合成樹脂フィルム上に厚みが約1mmになるように薄く引
き伸ばし、これを乾燥させて成膜し、その後、これを合
成樹脂フィルム上から引き剥がした。Then, the paste-like decomposed product thus obtained is
It was thinly stretched on a synthetic resin film to a thickness of about 1 mm, dried to form a film, and then peeled off from the synthetic resin film.
このようにして得られた生分解性フィルムは、半透明
の強固な膜であり、水に対しては、一部分散されて容易
に溶解し、またヒートシールも可能であった。The biodegradable film thus obtained was a semitransparent and strong film, and was partially dispersed and easily dissolved in water, and heat sealing was also possible.
また、この実施例のものにおいては、生おからをホモ
ゲナイザーによって均質化させるようにしたため、製造
された生分解性フィルムは全体が均一なものになってい
た。Further, in this example, since raw okara was homogenized by a homogenizer, the produced biodegradable film was uniform throughout.
しかし、このようなホモゲナイザーによる処理を行わ
ないようにすることも可能であり、ホモゲナイザーによ
る処理を行わなかった場合においても、上記の実施例の
場合と同様の生分解性フィルムが得られたが、このよう
にして得られた生分解性フィルムにおいては、少しむら
が存在した。However, it is also possible not to perform such a treatment with a homogenizer, even when not treated with a homogenizer, the same biodegradable film as in the case of the above example was obtained, The biodegradable film thus obtained had some unevenness.
（実施例２） この実施例のものにおいても、上記実施例１の場合と
同様にして、生おからを高圧ホモゲナイザーで処理した
後、蛋白を分解させて可溶化した蛋白を除去し、その
後、水不溶性の植物繊維を酸性下で分解させて、これを
中和させるようにした。(Example 2) Also in this Example, raw okara was treated with a high-pressure homogenizer in the same manner as in Example 1 above, and then the protein was decomposed to remove the solubilized protein, and then, The water-insoluble plant fiber was decomposed under acidic conditions so as to be neutralized.
そして、この実施例のものにおいては、上記のように
中和させた後、これを8000rpmで30分間遠心分離させ
て、水溶性の植物繊維を多く含む水溶画分を取り出し、
この水溶画分を固形分濃度が約15重量％になるまで濃縮
させた後、これを上記実施例１の場合と同様に、合成樹
脂フィルム上に薄く引き伸ばし、これを乾燥させて成膜
し、その後、これを合成樹脂フィルム上から引き剥がし
た。Then, in the example, after neutralized as described above, it is centrifuged at 8000 rpm for 30 minutes, the water-soluble fraction containing a large amount of water-soluble plant fibers is taken out,
After concentrating the water-soluble fraction until the solid content concentration became about 15% by weight, it was thinly stretched on a synthetic resin film and dried to form a film, as in Example 1 above. Then, this was peeled off from the synthetic resin film.
このようにして得られた生分解性フィルムは、上記実
施例１の場合に比べて、透明度が高くなっており、殆ど
透明の強固な膜であり、また水に対しては、分散するこ
となく全体が溶解し、ヒートシールも可能であった。The biodegradable film thus obtained has a higher transparency as compared with the case of Example 1 above, is an almost transparent and strong film, and does not disperse in water. The whole was melted and heat sealing was possible.
（実施例３） この実施例のものにおいては、上記実施例２のよう
に、遠心分離させて得た水溶性の植物繊維を多く含む水
溶画分に、99％のエタノールを加えて80％のエタノール
溶液になるように調整し、水溶画分中における水溶性の
植物繊維の高分子画分を沈殿させるようにした。(Example 3) In this example, as in Example 2 above, 99% ethanol was added to the water-soluble fraction containing a large amount of water-soluble plant fibers obtained by centrifugation to obtain 80% of the water-soluble fraction. The solution was adjusted to be an ethanol solution so that the polymer fraction of water-soluble plant fiber in the water-soluble fraction was precipitated.
そして、このように沈殿した高分子画分を熱風乾燥さ
せた後、これに水を加えて20％の水溶液に調整した後、
上記実施例１の場合と同様に、これを合成樹脂フィルム
上に薄く引き伸ばして乾燥させ、成膜させた後、これを
合成樹脂フィルム上から引き剥がした。Then, the polymer fraction thus precipitated was dried with hot air, and water was added to this to prepare a 20% aqueous solution,
As in the case of Example 1 above, this was thinly stretched on a synthetic resin film and dried to form a film, which was then peeled off from the synthetic resin film.
このようにして得られた生分解性フィルムは、上記実
施例２の場合と同様に、殆ど透明の強固な膜であり、水
に対しては分散することなく全体が溶解し、ヒートシー
ルも可能であり、さらに長期にわたっても透明な膜の状
態で維持された。The biodegradable film thus obtained is a substantially transparent and strong film as in the case of Example 2 above, and the whole is dissolved in water without being dispersed, and heat sealing is also possible. It was maintained as a transparent film for a long period of time.
（実施例４） この実施例のものにおいては、前記の生おからに対し
て、その２倍の水を加えた後、これに濃度36％の塩酸を
加えてpHを2.5に調整し、これを100℃で1.5時間かかて
分解させるようにした。(Example 4) In this example, twice the water was added to the above-mentioned raw okara, and then 36% concentration of hydrochloric acid was added to adjust the pH to 2.5. Was allowed to decompose at 100 ° C for 1.5 hours.
次いで、この分解物をホモゲナイザーによって処理す
るようにした。このように分解物をホモゲナイザーによ
って処理すると、滑らかなペーストになった。Then, this decomposed product was processed by a homogenizer. When the decomposed product was treated with a homogenizer in this manner, a smooth paste was obtained.
そして、このように滑らかなペースト状になった分解
物に、可塑剤としてグリセリンとソルビトールとをそれ
ぞれ1.0％加えた後、このペーストを、キャスティング
法によってキャスティング時における厚さが1.0mmにな
るようにしてキャスティングさせ、これを乾燥させて厚
さ0.1mmになった生分解性フィルムを得た。Then, 1.0% each of glycerin and sorbitol as a plasticizer was added to the decomposition product in the form of a smooth paste like this, and the paste was made to have a thickness of 1.0 mm at the time of casting by the casting method. It was then cast and dried to obtain a biodegradable film having a thickness of 0.1 mm.
このようにして製造された生分解性フィルムは、透明
性があり、強固でかつ滑らかな膜であり、ヒートシール
も可能であった。The biodegradable film produced in this manner was a transparent, strong and smooth film, and could be heat-sealed.
（実施例５） この実施例のものにおいても、上記実施例４の場合と
同様に、生おからに対して２倍の水を加えた後、これに
濃度36％の塩酸を加えて、そのpHを調整するようにし
た。(Example 5) Also in this example, as in the case of the above-mentioned Example 4, twice as much water was added to raw okara, and then hydrochloric acid having a concentration of 36% was added thereto, The pH was adjusted.
ここで、この実施例のものにおいては、そのpHを生お
からに含まれる大豆蛋白の等電点近くの4.5に調整し、
これを120℃で1.5時間かけて分解させるようにした。Here, in the example, the pH was adjusted to 4.5 near the isoelectric point of soybean protein contained in raw okara,
This was allowed to decompose at 120 ° C. for 1.5 hours.
このように生おからを大豆蛋白の等電点近くのpH4.5
で分解させると、この生おから中における水不溶性の植
物繊維が適度に分解されて、水溶性の植物繊維が溶出す
る一方、この生おからに含まれる大豆蛋白が凝集して、
水溶性の植物繊維が溶出した水溶液側への蛋白の溶出が
抑制された。In this way, raw okara is adjusted to pH 4.5 near the isoelectric point of soybean protein.
When decomposed with, the water-insoluble vegetable fiber in this raw okara is appropriately decomposed, and the water-soluble vegetable fiber is eluted, while the soybean protein contained in this raw okara aggregates,
The elution of protein to the aqueous solution side where the water-soluble plant fiber was eluted was suppressed.
そして、このように分解されたものを、前記実施例２
の場合と同様にして、8000rpmで30分間遠心分離させ
て、水溶性の植物繊維を多く含む水溶画分を取り出し、
この水溶画分を固形分濃度が約５重量％になるまで濃縮
させるようにした。Then, the thus decomposed product is used in the second embodiment.
In the same manner as in the case of, it is centrifuged at 8000 rpm for 30 minutes, and the water-soluble fraction containing a large amount of water-soluble plant fibers is taken out,
This aqueous fraction was concentrated until the solid content concentration became about 5% by weight.
次いで、このように濃縮された分解物を、上記実施例
４の場合と同様にして成膜させるようにした。Next, the decomposed product thus concentrated was formed into a film in the same manner as in the case of Example 4 above.
このようにして製造した生分解性フィルムは、透明で
蛋白含量の低いものであり、ヒートシールも可能であっ
た。The biodegradable film produced in this manner was transparent and had a low protein content, and could be heat-sealed.
［発明の効果］ 以上詳述したように、この発明に係る生分解性フィル
ムの製造方法においては、水不溶性の植物繊維を加水分
解させ、このようにして得られた分解物を成膜させて生
分解性フィルムを製造するようにしたため、水不溶性の
植物繊維が分解されてなる水溶性の植物繊維が結着材と
して作用し、薄膜でも十分な強度をもつと共に、ヒート
シールも行える生分解性フィルムが得られた。[Effects of the Invention] As described in detail above, in the method for producing a biodegradable film according to the present invention, water-insoluble plant fibers are hydrolyzed, and the decomposition product thus obtained is formed into a film. Since the biodegradable film is manufactured, the water-soluble plant fiber, which is formed by decomposing water-insoluble plant fiber, acts as a binder, and even a thin film has sufficient strength and can be heat-sealed. A film was obtained.
また、この発明に係る生分解性フィルムの製造方法に
おいては、生分解性フィルムを製造する原料として、お
から等の安価な水不溶性の植物繊維を使用することがで
きると共に、その製造も上記のように容易に行え、従来
の微生物産生多糖類フィルムに比べて、その製造コスト
も低減できるようになった。Further, in the method for producing a biodegradable film according to the present invention, as a raw material for producing the biodegradable film, inexpensive water-insoluble plant fibers such as okara can be used, and the production thereof is also the above-mentioned. As described above, the production cost can be reduced as compared with the conventional microbial-produced polysaccharide film.
さらに、上記のように水不溶性の植物繊維を加水分解
させて得られた分解物中における水溶性画分、すなわ
ち、水溶性の植物繊維を多く含む部分を分離させ、この
ように水溶性の植物繊維を多く含む水溶性画分を用い
て、生分解性フィルムを製造するようにした場合には、
より強度が高く、かつ不純物も少なくて透明な生分解性
フィルムが得られるようになった。Furthermore, the water-soluble fraction in the hydrolyzate obtained by hydrolyzing the water-insoluble plant fiber as described above, that is, the part containing a large amount of the water-soluble plant fiber is separated, and thus the water-soluble plant is obtained. When a biodegradable film is produced by using a water-soluble fraction containing a large amount of fiber,
It has become possible to obtain a transparent biodegradable film having higher strength and less impurities.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｃ０８Ｌ 1:00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code Agency reference number FI Technical indication // C08L 1:00
Claims (2)
れた分解物を用いて成膜させるようにしたことを特徴と
する生分解性フィルムの製造方法。1. A method for producing a biodegradable film, characterized in that a film is formed using a decomposed product obtained by hydrolyzing water-insoluble plant fiber.
れた分解物中における水溶性画分を分離させ、このよう
に分離された水溶性画分を用いて成膜させるようにした
ことを特徴とする生分解性フィルムの製造方法。2. A water-soluble fraction in a hydrolyzate obtained by hydrolyzing a water-insoluble plant fiber is separated, and a film is formed using the water-soluble fraction thus separated. A method for producing a biodegradable film, which comprises:
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2788290A JP2552375B2 (en) | 1990-02-07 | 1990-02-07 | Method for producing biodegradable film |
| GB9120268A GB2256570B (en) | 1990-02-07 | 1991-02-05 | Process for production of water-soluble vegetable fibers, biodegradable film, paste, chewing gum and low calorie food products |
| PCT/JP1991/000132 WO1991011919A1 (en) | 1990-02-07 | 1991-02-05 | Process for producing water-soluble vegetable fiber, and biodegradable film, sizing agent, chewing gum and low-calorie food obtained from said fiber |
| DE19914190252 DE4190252T (en) | 1990-02-07 | 1991-02-05 | |
| DE4190252A DE4190252B4 (en) | 1990-02-07 | 1991-02-05 | Process for the preparation of water-soluble soybean fibers and their use |
| US08/437,983 US5587197A (en) | 1990-02-07 | 1995-05-10 | Process for production of water-soluble vegetable fiber |
| US08/714,957 US6004616A (en) | 1990-02-07 | 1996-09-17 | Biodegradable vegetable film |
| US09/389,623 US6280526B1 (en) | 1990-02-07 | 1999-09-03 | Process for production of water-soluble vegetable fibers, biodegradable film, paste, chewing gum and low calorie food products |
| US09/863,404 US6569473B2 (en) | 1990-02-07 | 2001-05-24 | Process for production of water-soluble vegetable fibers, biodegradable film, paste, chewing gum and low calorie food products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2788290A JP2552375B2 (en) | 1990-02-07 | 1990-02-07 | Method for producing biodegradable film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03231927A JPH03231927A (en) | 1991-10-15 |
| JP2552375B2 true JP2552375B2 (en) | 1996-11-13 |
Family
ID=12233265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2788290A Expired - Lifetime JP2552375B2 (en) | 1990-02-07 | 1990-02-07 | Method for producing biodegradable film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2552375B2 (en) |
-
1990
- 1990-02-07 JP JP2788290A patent/JP2552375B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03231927A (en) | 1991-10-15 |
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