JPH081695A - Production of cellulose/chitosan type molded product - Google Patents
Production of cellulose/chitosan type molded productInfo
- Publication number
- JPH081695A JPH081695A JP16308894A JP16308894A JPH081695A JP H081695 A JPH081695 A JP H081695A JP 16308894 A JP16308894 A JP 16308894A JP 16308894 A JP16308894 A JP 16308894A JP H081695 A JPH081695 A JP H081695A
- Authority
- JP
- Japan
- Prior art keywords
- cellulose
- chitosan
- molded product
- corona discharge
- molded article
- 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
- 229920001661 Chitosan Polymers 0.000 title claims abstract description 49
- 229920002678 cellulose Polymers 0.000 title claims abstract description 36
- 239000001913 cellulose Substances 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 238000003851 corona treatment Methods 0.000 claims abstract description 20
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 8
- 239000001301 oxygen Substances 0.000 claims abstract description 8
- 235000010980 cellulose Nutrition 0.000 claims description 30
- 239000007900 aqueous suspension Substances 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 2
- 241000238557 Decapoda Species 0.000 abstract description 3
- 241000609240 Ambelania acida Species 0.000 abstract description 2
- 241000238424 Crustacea Species 0.000 abstract description 2
- 241000196324 Embryophyta Species 0.000 abstract description 2
- 229920002488 Hemicellulose Polymers 0.000 abstract description 2
- SMEGJBVQLJJKKX-HOTMZDKISA-N [(2R,3S,4S,5R,6R)-5-acetyloxy-3,4,6-trihydroxyoxan-2-yl]methyl acetate Chemical compound CC(=O)OC[C@@H]1[C@H]([C@@H]([C@H]([C@@H](O1)O)OC(=O)C)O)O SMEGJBVQLJJKKX-HOTMZDKISA-N 0.000 abstract description 2
- 229940081735 acetylcellulose Drugs 0.000 abstract description 2
- 230000001580 bacterial effect Effects 0.000 abstract description 2
- 239000010905 bagasse Substances 0.000 abstract description 2
- 229920002301 cellulose acetate Polymers 0.000 abstract description 2
- 239000010902 straw Substances 0.000 abstract description 2
- 239000002023 wood Substances 0.000 abstract description 2
- 241000894006 Bacteria Species 0.000 abstract 2
- 238000000034 method Methods 0.000 description 9
- 239000007864 aqueous solution Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 108010010803 Gelatin Proteins 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229920000331 Polyhydroxybutyrate Polymers 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 238000006065 biodegradation reaction Methods 0.000 description 2
- 229940105990 diglycerin Drugs 0.000 description 2
- GPLRAVKSCUXZTP-UHFFFAOYSA-N diglycerol Chemical compound OCC(O)COCC(O)CO GPLRAVKSCUXZTP-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 229920000159 gelatin Polymers 0.000 description 2
- 239000008273 gelatin Substances 0.000 description 2
- 235000019322 gelatine Nutrition 0.000 description 2
- 235000011852 gelatine desserts Nutrition 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 239000005015 poly(hydroxybutyrate) Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 229920002101 Chitin Polymers 0.000 description 1
- 229920002261 Corn starch Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 244000299507 Gossypium hirsutum Species 0.000 description 1
- 229920000881 Modified starch Polymers 0.000 description 1
- 239000004368 Modified starch Substances 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000002262 Schiff base Substances 0.000 description 1
- 150000004753 Schiff bases Chemical class 0.000 description 1
- 235000011054 acetic acid Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000012773 agricultural material Substances 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000008120 corn starch Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000006196 deacetylation Effects 0.000 description 1
- 238000003381 deacetylation reaction Methods 0.000 description 1
- 229920006238 degradable plastic Polymers 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000019426 modified starch Nutrition 0.000 description 1
- 239000005445 natural material Substances 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Moulding By Coating Moulds (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、機械的強度が向上され
た微生物分解性を有するセルロース・キトサン系成形品
の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a cellulose-chitosan-based molded article having improved mechanical strength and having biodegradability.
【０００２】[0002]
【従来の技術】従来、熱可塑性樹脂、例えばポリオレフ
ィン系樹脂、ポリ塩化ビニル系樹脂、ポリスチレン系樹
脂等から成るフィルム、シートあるいは発泡成形品は、
その特性を活かして包装用資材、農業用資材、産業用資
材等様々な用途に使用されている。2. Description of the Related Art Conventionally, a film, sheet or foam-molded article made of a thermoplastic resin such as polyolefin resin, polyvinyl chloride resin, polystyrene resin, etc.
Utilizing its characteristics, it is used for various purposes such as packaging materials, agricultural materials, and industrial materials.
【０００３】しかしながら、これらの熱可塑性樹脂から
成る成形品は化学的に安定であるためひとたび自然界に
放置された場合、分解するには極めて長い年月を要す
る。従って、それらの廃棄処分をめぐる問題は、近年一
種の社会問題となっている。However, since molded articles made of these thermoplastic resins are chemically stable, it takes a very long time to decompose once left in the natural environment. Therefore, the problem of their disposal has become a kind of social problem in recent years.
【０００４】このような情勢に鑑み近年種々の分解性プ
ラスチックが開発されている。たとえば、ポリオレフィ
ンにコーンスターチ等の澱粉質を添加し微生物分解性を
付与したもの、微生物が生産するＰＨＢ（ポリヒドロキ
シブチレート）及びその誘導体からなるもの、変性澱粉
と変性ＰＶＡから成る組成物からなるもの、あるいはポ
リマー主鎖中にカルボニル基を導入した光分解性プラス
チック等が報告されている。In view of such circumstances, various degradable plastics have been developed in recent years. For example, one obtained by adding a starch material such as corn starch to microbial degradability to polyolefin, one made of PHB (polyhydroxybutyrate) produced by a microorganism and its derivative, and one made of a composition composed of modified starch and modified PVA. Alternatively, photodegradable plastics in which a carbonyl group is introduced into the polymer main chain have been reported.
【０００５】一方、本発明者らは、先にセルロース及び
キトサンからなるセルロース・キトサン系の微生物分解
性成形物を提案した（特開平２−６６８９号公報、特開
平２−１２７４８６号公報）。また、該成形物の製造方
法についても提案を行った（特開平２−１３５７３０号
公報）。このセルロース・キトサン系の微生物分解性成
形物は、素材が天然物であることから微生物分解速度が
速く、更に分解後自然界に及ぼす悪影響もない。しかし
機械的強度面では乾燥状態、湿潤状態いずれもほぼ良好
であるものの、特に強い機械的強度が要求される用途で
は応用が難しいという問題があった。この問題を解決す
る手段として、セルロース・キトサン系の微生物分解性
成形物を成形後、１００℃近辺の温度に一定時間保つと
いう方法がある。この方法によれば、確かに機械的強度
の向上はみられるが、強度の向上とともに成形物が褐色
に変色して、商品値価が低下するという問題があった。On the other hand, the inventors of the present invention have previously proposed a cellulose-chitosan-based microbial-degradable molded article composed of cellulose and chitosan (JP-A-2-6689 and JP-A-2-127486). In addition, a method for producing the molded product was also proposed (Japanese Patent Laid-Open No. 2-135730). This cellulose-chitosan-based microbial-degradable molded article has a fast microbial-degrading rate because it is a natural material, and has no adverse effect on the natural world after degradation. However, in terms of mechanical strength, both dry and wet conditions are almost good, but there is a problem that it is difficult to apply it in applications where particularly high mechanical strength is required. As a means for solving this problem, there is a method in which a cellulose-chitosan-based microbial-degradable molded article is molded and then kept at a temperature of around 100 ° C. for a certain period of time. According to this method, although the mechanical strength is certainly improved, there is a problem that the molded product is discolored brown with the improvement of the strength and the commercial price is lowered.
【０００６】一方、コロナ放電処理は、ポリエチレン等
のプラスチックの印刷特性等を向上させるために極く一
般的に用いられている方法である。しかしながら、コロ
ナ放電処理によってプラスチックの強度が向上するとい
う報告は未だされていない。また、セルロースにコロナ
放電処理を施すという研究事例もあるが、やはり強度の
向上については報告されていない。On the other hand, the corona discharge treatment is a method generally used for improving the printing characteristics of plastics such as polyethylene. However, there has not been reported yet that the strength of the plastic is improved by the corona discharge treatment. In addition, although there is a research example of subjecting cellulose to corona discharge treatment, no improvement in strength has been reported.
【０００７】[0007]
【発明が解決しようとする課題】本発明の目的は、成形
品の外観を損なうことなく、より簡便な手段により、セ
ルロース類及びキトサン類からなる微生物分解性を有す
るセルロース・キトサン系成形品の機械的強度を向上さ
せる方法を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to machine a cellulose-chitosan-based molded article having a biodegradability of cellulose and chitosan by a simpler means without impairing the appearance of the molded article. It is to provide a method of improving the physical strength.
【０００８】[0008]
【問題を解決するための手段】本発明によれば、セルロ
ース類及びキトサン類を主成分とする成形物を、酸素の
存在する雰囲気下においてコロナ放電処理することを特
徴とするセルロース・キトサン系成形品の製造方法が提
供され、更に、前記成形物が、セルロース類とキトサン
類とを含む水懸濁液を流延して得られたシートあるいは
フィルムであることを特徴とする前記セルロース・キト
サン系成形品の製造方法が提供される。According to the present invention, a cellulose-chitosan-based molding characterized by subjecting a molded product mainly composed of celluloses and chitosans to corona discharge treatment in an atmosphere in which oxygen is present. Further provided is a method for producing a product, wherein the molded product is a sheet or film obtained by casting an aqueous suspension containing celluloses and chitosans, wherein the cellulose-chitosan system is provided. A method of manufacturing a molded article is provided.
【０００９】すなわち、セルロース類及びキトサン類か
らなる成形物を、酸素の存在する雰囲気下において、コ
ロナ放電処理することによって機械的強度が大幅に向上
し、特に、セルロース類及びキトサン類からなる成形物
がセルロース類とキトサン類を含む水懸濁液を流延して
得られたシートあるいはフィルムである場合には、その
効果がより顕著であることを見い出し本発明に到達した
ものである。That is, the mechanical strength of a molded product of celluloses and chitosans is greatly improved by subjecting it to corona discharge treatment in an atmosphere containing oxygen, and in particular, a molded product of celluloses and chitosans. The present invention has been completed by finding that the effect is more remarkable when the sheet or film is obtained by casting an aqueous suspension containing celluloses and chitosans.
【００１０】以下、本発明を詳細に説明する。本発明に
おいて用いられるセルロース類としては、木材、藁、
綿、麻、竹、バガス等の植物から得られるセルロース、
ヘミセルロース、リグノセルロース、ペクトセルロース
や菌が生産するバクテリアセチルセルロース等が挙げら
れ、これらの中でも繊維状のものが好ましく、特に、微
細に叩解した繊維が好ましい。Hereinafter, the present invention will be described in detail. Cellulose used in the present invention, wood, straw,
Cellulose obtained from plants such as cotton, hemp, bamboo and bagasse,
Examples thereof include hemicellulose, lignocellulose, pectocellulose, and bacterial acetylcellulose produced by fungi. Among these, fibrous ones are preferable, and finely beaten fibers are particularly preferable.
【００１１】一方、本発明において用いられるキトサン
類は、カニ、エビ等の甲殻類の殻、菌糸体等から得られ
るキチンを脱アセチル化したものであるが、キトサン類
の分子量、脱アセチル化度を特に限定するものではな
い。キトサン類はそのままでは水に不溶であるので、通
常、塩酸等の無機酸や蟻酸、酢酸、乳酸等の有機酸でキ
トサン塩にして、水溶液の状態で使用する。On the other hand, the chitosans used in the present invention are deacetylated chitins obtained from shells of crustaceans such as crabs and shrimps, mycelium, etc., but the molecular weight and the degree of deacetylation of chitosans. Is not particularly limited. Since chitosans are insoluble in water as they are, they are usually used as an aqueous solution by forming a chitosan salt with an inorganic acid such as hydrochloric acid or an organic acid such as formic acid, acetic acid or lactic acid.
【００１２】本発明において、成形物は、セルロース類
２０〜９９．５重量％、キトサン類０．５〜４０重量％
の割合で含むのが好ましく、更に好ましくは、セルロー
ス類３０〜７０重量％、キトサン類１０〜２０重量％で
ある。セルロース類、或いはキトサン類の含有量が少な
すぎるとコロナ放電処理の効果が余り発揮できない。In the present invention, the molded product is composed of 20 to 99.5% by weight of celluloses and 0.5 to 40% by weight of chitosans.
It is preferable that the content is 30 to 70% by weight of celluloses and 10 to 20% by weight of chitosans. If the content of celluloses or chitosans is too small, the effect of corona discharge treatment cannot be fully exerted.
【００１３】更に、本発明においては必要に応じて公知
の可塑剤、タンパク質、澱粉質等の生分解助剤、充填
剤、着色剤、発泡剤等の添加剤を併用することもなんら
さしつかえない。Further, in the present invention, known additives such as a plasticizer, a biodegradation aid such as protein and starch, a filler, a coloring agent, a foaming agent and the like may be used in combination if necessary.
【００１４】また、本発明の成形品としては、フィル
ム、シート、及び一定の立体的な形状を有する成形品、
発泡体等である。The molded article of the present invention includes a film, a sheet, and a molded article having a certain three-dimensional shape,
It is a foam or the like.
【００１５】本発明のセルロース類及びキトサン類を主
成分とする成形物は、例えば、セルロース類の水分散液
とキトサン塩の水溶液を混合してセルロース類とキトサ
ン類からなる水懸濁液となし、これを流延してシートあ
るいはフィルムを製造する方法、あるいは紙等のセルロ
ース系素材にキトサン塩の水溶液を塗布するか、該水溶
液に浸漬した後乾燥して製造する方法等が挙げられる。
特に、本発明においては上記水懸濁液をシート状あるい
はフィルム状に流延して製造した成形物が好ましく使用
できる。The molded article containing cellulose and chitosan as main components of the present invention is, for example, prepared by mixing an aqueous dispersion of cellulose and an aqueous solution of chitosan salt to prepare an aqueous suspension containing cellulose and chitosan. Examples thereof include a method of casting this to produce a sheet or film, a method of applying an aqueous solution of chitosan salt to a cellulosic material such as paper, or a method of producing by dipping in the aqueous solution and then drying.
In particular, in the present invention, a molded product produced by casting the above-mentioned water suspension in a sheet shape or a film shape can be preferably used.
【００１６】本発明は、このようにして得られるセルロ
ース類及びキトサン類を主成分とする成形物を、酸素の
存在する雰囲気下において、コロナ放電処理するのであ
るが、コロナ放電の方法や手順について特に限定するも
のではない。例えば、セルロース類とキトサン類からな
る水懸濁液を流延して得られたシートあるいはフィルム
をコロナ放電処理してもよいし、該水懸濁液を流延する
過程でコロナ放電処理してもよい。なお、コロナ放電処
理の処理強度については特に限定するものではなく、低
レベルの処理強度から高レベルの処理強度まで幅広い処
理強度範囲で行なうことができる。In the present invention, the molded product containing cellulose and chitosan as main components thus obtained is subjected to corona discharge treatment in an atmosphere in which oxygen is present. It is not particularly limited. For example, a sheet or film obtained by casting an aqueous suspension of celluloses and chitosans may be subjected to corona discharge treatment, or may be subjected to corona discharge treatment in the process of casting the aqueous suspension. Good. The treatment strength of the corona discharge treatment is not particularly limited, and it can be performed in a wide treatment strength range from a low treatment strength to a high treatment strength.
【００１７】以上述べたようにセルロース類及びキトサ
ン類を主成分とする成形物を、酸素の存在する雰囲気下
においてコロナ放電処理することによって、得られるセ
ルロース・キトサン系成形品の強度が向上する化学的メ
カニズムは明確ではないが、セルロース類及びキトサン
類を主成分とする成形物を酸素の存在する雰囲気下でコ
ロナ放電処理することにより該成形物中のセルロース成
分の一部にカルボニル基が生起し、このカルボニル基と
キトサン類分子中のアミノ基との間でシッフ塩基による
架橋構造が生成され、結果的に機械的強度が向上するも
のと考えられる。このような効果はセルロース及びキト
サンからなる成形物の厚みが薄い方がより高い。したが
って、成形物の形状がシート状あるいはフィルム状であ
ることが好ましく、その厚みは１００μｍ以下の場合が
特に好ましい。As described above, by subjecting a molded article containing celluloses and chitosans as main components to corona discharge treatment in an atmosphere in which oxygen is present, the strength of the resulting cellulose / chitosan molded article is improved. Although the mechanical mechanism is not clear, a carbonyl group is generated in a part of the cellulose component in the molded product by subjecting the molded product mainly composed of celluloses and chitosans to corona discharge treatment in an atmosphere containing oxygen. It is believed that a Schiff base cross-linking structure is formed between the carbonyl group and the amino group in the chitosan molecule, resulting in improvement in mechanical strength. Such an effect is higher when the thickness of the molded product made of cellulose and chitosan is smaller. Therefore, the shape of the molded product is preferably sheet-like or film-like, and the thickness thereof is particularly preferably 100 μm or less.
【００１８】[0018]
【実施例】以下、本発明を実施例により具体的に説明す
るが、本発明はこれらに限定されるものではない。尚、
実施例における引張強度、伸びの測定は島津製作所製オ
ートグラフＡＧ−５０００を用い、ＡＳＴＭ Ｄ−８８
２に準拠して測定した。また、本実施例においてコロナ
放電処理機としてベータホーン社製ε−ＴＲＥＡＴＥＲ
（コロナ放電処理巾：１．３ｍ）を用いた。EXAMPLES The present invention will now be specifically described with reference to examples, but the present invention is not limited thereto. still,
The tensile strength and the elongation in the examples were measured by using an autograph AG-5000 manufactured by Shimadzu Corporation, and ASTM D-88 was used.
It measured based on 2. Also, in this embodiment, as a corona discharge treatment device, ε-TREATER manufactured by Betahorn Co., Ltd.
(Corona discharge treatment width: 1.3 m) was used.
【００１９】製造例 広葉樹パルプを叩解して得られた微細セルロース繊維の
水分散液（濃度４ｗｔ％）、キトサン酢酸塩水溶液、可
塑剤としてのジグリセリン、及び生分解助材としてのゼ
ラチン水溶液を、セルロース：キトサン：ジグリセリ
ン：ゼラチンが重量比で１００：３０：７５：２となる
ように、また混合液中の固形分濃度が４％となるように
混合して、セルロースとキトサンからなる水懸濁液を得
た。この水懸濁液をダイスリットを介して、エンドレス
ベルトの上に流延し、温度１４０℃で乾燥した後、エン
ドレスベルトから剥離することにより、セルロース及び
キトサンからなるシート状の成形物を得た。この成形物
の厚みは５０μｍであった。Production Example An aqueous dispersion of fine cellulose fibers (concentration 4 wt%) obtained by beating hardwood pulp, an aqueous chitosan acetate solution, diglycerin as a plasticizer, and an aqueous gelatin solution as a biodegradation aid, Cellulose: chitosan: diglycerin: gelatin are mixed so that the weight ratio is 100: 30: 75: 2, and the solid content concentration in the mixed solution is 4%. A suspension was obtained. This water suspension was cast on an endless belt through a die slit, dried at a temperature of 140 ° C., and then peeled off from the endless belt to obtain a sheet-shaped molded product made of cellulose and chitosan. . The thickness of this molded product was 50 μm.
【００２０】実施例１〜４、比較例 製造例で得られたセルロース及びキトサンからなるシー
ト状の成形物の両面を空気中で処理速度１５ｍ／ｍｉ
ｎ、所定のコロナ放電処理電力でコロナ放電処理して本
発明のセルロース・キトサン系成形品を得た。この成形
品は外観の変化もなく、優れた微生物分解性を示した。
引張強度及び伸びを表１に示す。また、比較のためにコ
ロナ放電処理していない成形品の引張強度及び伸びを併
せて表１に示す。Examples 1 to 4 and Comparative Example Both sides of the sheet-like molded article composed of cellulose and chitosan obtained in the Production Example were treated in air at a treatment speed of 15 m / mi.
n, corona discharge treatment was performed with a predetermined corona discharge treatment power to obtain a cellulose-chitosan-based molded product of the present invention. This molded product showed no change in appearance and showed excellent biodegradability.
The tensile strength and elongation are shown in Table 1. In addition, for comparison, Table 1 also shows the tensile strength and elongation of the molded product not subjected to the corona discharge treatment.
【００２１】[0021]
【表１】 [Table 1]
【００２２】[0022]
【発明の効果】本発明方法によれば、セルロース類及び
キトサン類を主成分とするセルロース・キトサン系成形
品の外観を損なうことなくその強度を向上させることが
でき、特に強い機械的強度が要求される用途への応用を
可能とすることができる。EFFECTS OF THE INVENTION According to the method of the present invention, the strength of a cellulose / chitosan-based molded article containing cellulose and chitosan as main components can be improved without impairing the appearance, and particularly strong mechanical strength is required. It can be applied to the intended use.
───────────────────────────────────────────────────── 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 Ｂ２９Ｌ 7:00 (72)発明者 細川 純 香川県高松市花ノ宮町２丁目３番３号 工 業技術院四国工業技術研究所内 (72)発明者 金岡 邦夫 香川県丸亀市中津町1515番地 大倉工業株 式会社内 (72)発明者 立石 健二 香川県丸亀市中津町1515番地 大倉工業株 式会社内 (72)発明者 上田 彰彦 香川県丸亀市中津町1515番地 大倉工業株 式会社内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Reference number within the agency FI Technical indication location B29L 7:00 (72) Inventor Jun Hosokawa 2-3-3 Hananomiya-cho, Takamatsu-shi, Kagawa Engineering (72) Inventor Kunio Kanaoka 1515 Nakatsu-cho, Marugame-shi, Kagawa Okura Industrial Co., Ltd. (72) Inventor Kenji Tateishi 1515 Nakatsu-cho, Marugame, Kagawa Okura Industrial Co., Ltd. 72) Inventor Akihiko Ueda 1515 Nakatsu-cho, Marugame-shi, Kagawa Okura Industrial Co., Ltd.
Claims (2)
する成形物を、酸素の存在する雰囲気下においてコロナ
放電処理することを特徴とするセルロース・キトサン系
成形品の製造方法。1. A method for producing a cellulose-chitosan-based molded article, which comprises subjecting a molded article containing cellulose and chitosan as main components to corona discharge treatment in an atmosphere in which oxygen is present.
類とを含む水懸濁液を流延して得られたシートあるいは
フィルムであることを特徴とする請求項１記載のセルロ
ース・キトサン系成形品の製造方法。2. The cellulose-chitosan-based molding according to claim 1, wherein the molded product is a sheet or film obtained by casting an aqueous suspension containing celluloses and chitosans. Method of manufacturing goods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16308894A JP2555545B2 (en) | 1994-06-22 | 1994-06-22 | Method for producing cellulose / chitosan-based molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16308894A JP2555545B2 (en) | 1994-06-22 | 1994-06-22 | Method for producing cellulose / chitosan-based molded product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH081695A true JPH081695A (en) | 1996-01-09 |
| JP2555545B2 JP2555545B2 (en) | 1996-11-20 |
Family
ID=15766963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16308894A Expired - Lifetime JP2555545B2 (en) | 1994-06-22 | 1994-06-22 | Method for producing cellulose / chitosan-based molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2555545B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7951237B2 (en) | 2000-02-21 | 2011-05-31 | Smartfiber Ag | Polymer composition and molded articles produced therefrom |
| CN110591169A (en) * | 2019-09-30 | 2019-12-20 | 台州学院 | Sugarcane fiber/chitosan composite film for food packaging and preparation method thereof |
-
1994
- 1994-06-22 JP JP16308894A patent/JP2555545B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7951237B2 (en) | 2000-02-21 | 2011-05-31 | Smartfiber Ag | Polymer composition and molded articles produced therefrom |
| US8496748B2 (en) | 2000-02-21 | 2013-07-30 | Smartfiber Ag | Polymer composition and molded articles produced therefrom |
| CN110591169A (en) * | 2019-09-30 | 2019-12-20 | 台州学院 | Sugarcane fiber/chitosan composite film for food packaging and preparation method thereof |
| CN110591169B (en) * | 2019-09-30 | 2022-04-05 | 台州学院 | Sugarcane fiber/chitosan composite film for food packaging and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2555545B2 (en) | 1996-11-20 |
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