JPH09194702A - Biodegradable film - Google Patents

Biodegradable film

Info

Publication number
JPH09194702A
JPH09194702A JP2998896A JP2998896A JPH09194702A JP H09194702 A JPH09194702 A JP H09194702A JP 2998896 A JP2998896 A JP 2998896A JP 2998896 A JP2998896 A JP 2998896A JP H09194702 A JPH09194702 A JP H09194702A
Authority
JP
Japan
Prior art keywords
film
polyester resin
polycaprolactone
weight
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.)
Pending
Application number
JP2998896A
Other languages
Japanese (ja)
Inventor
Takayuki Kuroda
隆之 黒田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daicel Corp
Original Assignee
Daicel Chemical Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daicel Chemical Industries Ltd filed Critical Daicel Chemical Industries Ltd
Priority to JP2998896A priority Critical patent/JPH09194702A/en
Priority to US08/667,004 priority patent/US5786408A/en
Priority to EP96401374A priority patent/EP0750015B1/en
Priority to DE69627929T priority patent/DE69627929T2/en
Priority to ES96401374T priority patent/ES2198469T3/en
Publication of JPH09194702A publication Critical patent/JPH09194702A/en
Pending legal-status Critical Current

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  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Biological Depolymerization Polymers (AREA)

Abstract

PROBLEM TO BE SOLVED: To obtain the subject film sufficient in mechanical strength characteristics and weather resistance for packing and agriculture, excellent in biodegradability, comprising a resin composition prepared by mixing a polycaprolactone with an aliphatic polyester resin. SOLUTION: This film is obtained by blending (A) 100 pts.wt. of an aliphatic polyester resin (a polyester resin of succinic acid and 1,4-butanediol) with (B) 1-200 pts.wt., preferably 4-55 pts.wt. of a polycaprolactone and forming the blend into a film by melt extrusion or a solution method. Biodegradability of the component A is induced by the component B and the film can be provided with sufficient mechanical strength characteristics and weather resistance.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、脂肪族ポリエステ
ル樹脂とポリカプロラクトンとの樹脂組成物からなる生
分解性に優れるフィルムであって、機械強度特性、耐候
性に優れ、各種生分解性包装材料、農業用フィルム等に
使用し得る生分解性フィルムに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film composed of a resin composition of an aliphatic polyester resin and polycaprolactone and having excellent biodegradability, which is excellent in mechanical strength characteristics and weather resistance, and various biodegradable packaging materials. , A biodegradable film that can be used for agricultural films and the like.

【0002】[0002]

【従来の技術】従来より、食品を初め各種商品の包装用
フィルムには、ポリエチレン、ポリプロピレン、ポリエ
チレンテレフタレート等に代表される芳香族ポリエステ
ルやポリアミド等が使用されている。また農業用フィル
ムは、地温の調節、雑草の発芽防止、作物の汚染防止及
び保護等の目的で使用されており、代表的な素材はポリ
エチレン、ポリ塩化ビニル、ポリアミド等である。
2. Description of the Related Art Conventionally, aromatic polyesters and polyamides represented by polyethylene, polypropylene, polyethylene terephthalate and the like have been used for packaging films for various products including foods. Agricultural films are used for controlling soil temperature, preventing germination of weeds, preventing contamination of crops and protecting them. Typical materials are polyethylene, polyvinyl chloride, polyamide and the like.

【0003】一般に、使用済みフィルムは使用後回収さ
れ、焼却処理や土中埋設処理等の処理を受ける。しかし
回収に多大な労力や費用を要するため、あるいは回収が
困難であるため、回収されずに放置される場合があり、
フィルムが難分解性である場合には環境保全の点で問題
が生じる。また回収したフィルムを焼却処理する場合に
は、高カロリーの燃焼熱が発生し、あるいは腐食性のガ
スの発生を伴い焼却炉を損傷するおそれもある。さら
に、土中埋設処理を行った場合、フィルムが難分解性で
あれば土中に半永久的に残留することになる。
Generally, used films are collected after use and subjected to incineration treatment, underground burying treatment and the like. However, it may be left uncollected because it requires a great deal of labor and cost or is difficult to collect.
If the film is difficult to decompose, there is a problem in terms of environmental protection. Further, when the recovered film is incinerated, there is a possibility that high calorie combustion heat is generated or corrosive gas is generated and the incinerator is damaged. Further, when the film is buried in the soil, if the film is difficult to decompose, it will remain in the soil semipermanently.

【0004】近年、このようなポリエチレン等の難分解
性あるいは不分解性の樹脂に生分解性を付与すべく、例
えば澱粉などの生分解性を有する成分をポリエチレン樹
脂等に混和する方法が検討されている。また、ポリエチ
レン樹脂等に光分解性を付与する方法、あるいは光分解
性を付与したポリエチレン樹脂等と澱粉等の生分解性を
有する成分とを混和する方法なども検討されている。
In recent years, in order to impart biodegradability to such hardly-decomposable or non-decomposable resins such as polyethylene, a method of mixing a biodegradable component such as starch with polyethylene resin has been investigated. ing. Further, a method of imparting photodegradability to a polyethylene resin or the like, or a method of mixing a photodegradable polyethylene resin or the like with a biodegradable component such as starch has been studied.

【0005】[0005]

【発明が解決しようとする課題】しかし、澱粉等の生分
解性を有する成分を混和する方法は、フィルムの機械強
度が低下し、場合によってはフィルムの形状が保持でき
ない。しかも、混和された澱粉はそれ自体分解性を有す
るが、その分解過程において澱粉以外のポリマー部分の
分解を誘引せず、結局はフィルムはバラバラにはなる
が、単に細かく切断されるにすぎず本質的な問題の解決
とはならない。これは光分解性の付与についても同様の
ことがいえ、光によって重合度の低下を引き起こすが生
分解性を有するわけではなく、さらに光が当たらない環
境下では意味がない。
However, the method of mixing biodegradable components such as starch lowers the mechanical strength of the film, and in some cases the shape of the film cannot be maintained. Moreover, the admixed starch itself has degradability, but it does not induce the decomposition of the polymer part other than starch in the decomposition process, and the film ends up falling apart, but it is merely cut into fine pieces and the essential It does not solve the problem. The same can be said for imparting photodegradability, which causes a decrease in the degree of polymerization by light, but does not have biodegradability and is meaningless in an environment where light is not applied.

【0006】一方、このような本質的に生分解性でない
樹脂に代わり、それ自体が生分解性を有する樹脂が第二
世代の生分解性樹脂として開発され、これに該当するも
のに化学合成で得られる脂肪族ポリエステル樹脂があ
る。
On the other hand, in place of such an essentially non-biodegradable resin, a resin having biodegradability itself has been developed as a second-generation biodegradable resin, and a resin corresponding to this can be chemically synthesized. There is an aliphatic polyester resin obtained.

【0007】しかし脂肪族ポリエステル樹脂は、重縮合
で高分子化する場合、製造工程の後半で高温高減圧の厳
しい条件下で反応が行われる。このため元来熱安定性の
よくないポリエステル樹脂の解重合が生じ、高分子量体
を得るのは困難である。従って得られたフィルムの機械
強度特性が不十分となり、広い用途展開を期待するに足
る強度の確保が困難となる。かかる場合、比較的低分子
量の脂肪族ポリエステルの両末端水酸基に、ジイソシア
ネートを反応させ、ウレタン結合を介して高分子量化す
る方法がある。高分子量化により高い機械強度特性を確
保し得るが、その一方、得られたフィルム等の分解が遅
くなる場合がある。このような状況から、本質的に生分
解性を有し、かつ機械強度特性と耐候性とを有し、かつ
優れた生分解性を有するフィルムの要求が高まってい
る。
However, when the aliphatic polyester resin is polymerized by polycondensation, the reaction is carried out under severe conditions of high temperature and high pressure in the latter half of the manufacturing process. Therefore, depolymerization of the polyester resin, which is originally poor in heat stability, occurs, and it is difficult to obtain a high molecular weight product. Therefore, the mechanical strength characteristics of the obtained film are insufficient, and it is difficult to secure the strength sufficient to expect wide application. In such a case, there is a method in which diisocyanate is reacted with hydroxyl groups at both ends of the aliphatic polyester having a relatively low molecular weight to increase the molecular weight through a urethane bond. Higher molecular weight can ensure high mechanical strength characteristics, but on the other hand, decomposition of the obtained film or the like may be delayed. Under such circumstances, there is an increasing demand for a film that is essentially biodegradable, has mechanical strength characteristics and weather resistance, and has excellent biodegradability.

【0008】[0008]

【課題を解決するための手段】本発明者は、脂肪族ポリ
エステル樹脂からなる組成物について鋭意研究を重ねた
結果、ポリカプロラクトンを所定量配合した樹脂組成物
からなるフィルムが、従来のフィルムの用途に何等問題
なく代替し得る機械強度特性や耐候性を有し、かつ、ポ
リカプロラクトンの配合が脂肪族ポリエステル樹脂の生
分解を誘引することにより、高い生分解性を示すフィル
ムとなることを見い出し、本発明を完成するに至った。
Means for Solving the Problems As a result of intensive studies conducted by the present inventor on a composition comprising an aliphatic polyester resin, a film comprising a resin composition containing a predetermined amount of polycaprolactone has been used as a conventional film. It has a mechanical strength property and weather resistance that can be replaced without any problem in, and by finding that the blending of polycaprolactone induces the biodegradation of the aliphatic polyester resin, it is found that the film exhibits high biodegradability, The present invention has been completed.

【0009】すなわち本発明は、脂肪族ポリエステル樹
脂100重量部に対しポリカプロラクトン1乃至200
重量部を配合したポリエステル樹脂組成物からなる生分
解性フィルムを提供するものである。また、脂肪族ポリ
エステル樹脂100重量部に対しポリカプロラクトン1
乃至200重量部を配合したポリエステル樹脂組成物を
40重量%以上含有する生分解性フィルムを提供するも
のである。以下、本発明を詳細に説明する。
That is, in the present invention, polycaprolactone 1 to 200 is added to 100 parts by weight of the aliphatic polyester resin.
It is intended to provide a biodegradable film made of a polyester resin composition containing parts by weight. Further, 1 part of polycaprolactone is added to 100 parts by weight of the aliphatic polyester resin.
The present invention provides a biodegradable film containing 40% by weight or more of a polyester resin composition containing 100 to 200 parts by weight. Hereinafter, the present invention will be described in detail.

【0010】[0010]

【発明の実施の形態】本発明で使用するポリエステル樹
脂組成物は、脂肪族ポリエステル樹脂とポリカプロラク
トンとの樹脂組成物からなる。脂肪族ポリエステル樹脂
としては、コハク酸と1,4−ブタンジオールとから得
られるポリエステル樹脂、コハク酸とエチレングリコー
ルとから得られるポリエステル樹脂、シュウ酸とネオペ
ンチルグリコールとから得られるポリエステル樹脂、シ
ュウ酸と1,4−ブタンジオールとから得られるポリエ
ステル樹脂、シュウ酸とエチレングリコールから得られ
るポリエステル樹脂等が例示できるが、融点が高く、好
ましいのはコハク酸と1,4−ブタンジオールとから得
られるポリエステル樹脂である。
BEST MODE FOR CARRYING OUT THE INVENTION The polyester resin composition used in the present invention comprises a resin composition of an aliphatic polyester resin and polycaprolactone. Examples of the aliphatic polyester resin include a polyester resin obtained from succinic acid and 1,4-butanediol, a polyester resin obtained from succinic acid and ethylene glycol, a polyester resin obtained from oxalic acid and neopentyl glycol, and oxalic acid. Examples thereof include a polyester resin obtained from 1,4-butanediol and a polyester resin obtained from oxalic acid and ethylene glycol, but a high melting point is preferable, and a succinic acid and 1,4-butanediol are preferable. It is a polyester resin.

【0011】脂肪族ポリエステル樹脂の好ましい数平均
分子量は、30,000乃至1,000,000の範
囲、より好ましくは70,000乃至200,000の
範囲である。平均分子量が30,000以下では機械特
性が不足し、1,000,000以上ではフィルム製造
工程で溶融粘度が高すぎ、押し出しが困難になる等の問
題を生ずる場合がある。
The preferred number average molecular weight of the aliphatic polyester resin is in the range of 30,000 to 1,000,000, more preferably 70,000 to 200,000. If the average molecular weight is 30,000 or less, the mechanical properties will be insufficient, and if it is 1,000,000 or more, the melt viscosity will be too high in the film production process, and problems such as difficulty in extrusion may occur.

【0012】本発明で使用するポリカプロラクトンは、
アルコール等の活性水素を開始剤とし、ε−カプロラク
トンを常法の開環重合で得たものを使用することができ
る。前記開始剤の官能数は特に制限はなく、2官能や3
官能のものが好ましく使用できる。ポリカプロラクトン
の数平均分子量は、好ましくは、1,000乃至20
0,000の範囲、特に好ましくは5,000乃至10
0,000の範囲である。尚、200,000よりも高
い数平均分子量のポリカプロラクトンも本発明において
問題なく使用することができるが、このような非常に分
子量の高いポリカプロラクトンを得ることは一般に困難
で現実的ではない。また、使用するポリカプロラクトン
は、ε−カプロラクトンの単重合体以外に、バレロラク
トンやグリコリド、ラクチド等のコモノマーを使用した
共重合体も使用可能である。
The polycaprolactone used in the present invention is
A product obtained by ring-opening polymerization of ε-caprolactone using an active hydrogen such as alcohol as an initiator can be used. The number of functionalities of the initiator is not particularly limited, and it is bifunctional or trifunctional.
A functional one can be preferably used. The number average molecular weight of the polycaprolactone is preferably 1,000 to 20.
Range of 50,000, particularly preferably 5,000 to 10
It is in the range of 0000. Although polycaprolactone having a number average molecular weight higher than 200,000 can be used in the present invention without any problem, it is generally difficult and unrealistic to obtain such a polycaprolactone having a very high molecular weight. As the polycaprolactone to be used, a copolymer using a comonomer such as valerolactone, glycolide, or lactide can be used in addition to the ε-caprolactone homopolymer.

【0013】本発明で使用するポリエステル樹脂組成物
は、脂肪族ポリエステル樹脂100重量部に対しポリカ
プロラクトン1乃至200重量部を混合したものである
ことが好ましく、より好ましくは脂肪族ポリエステル樹
脂100重量部に対しポリカプロラクトン4乃至55重
量部を混合したものである。この範囲で混合することに
より生分解性に優れ、かつ機械強度特性および耐候性に
優れるフィルムを得ることができる。
The polyester resin composition used in the present invention is preferably a mixture of 100 parts by weight of aliphatic polyester resin and 1 to 200 parts by weight of polycaprolactone, more preferably 100 parts by weight of aliphatic polyester resin. On the other hand, 4 to 55 parts by weight of polycaprolactone is mixed. By mixing within this range, a film having excellent biodegradability, mechanical strength characteristics and weather resistance can be obtained.

【0014】本発明の生分解性フィルムには、必要に応
じて他の生分解性樹脂成分や無機物を混合することもで
きる。上記したポリエステル樹脂組成物と他の成分との
配合割合は、得られる樹脂組成物(他の成分と上記ポリ
エステル樹脂組成物との合計は100重量%)に対しポ
リエステル樹脂組成物が40重量%以上であることが好
ましく、特に好ましくは60重量%以上である。本発明
で混合して用いることができる他の生分解性樹脂成分と
しては、ポリビニルアルコール系の樹脂、3−ヒドロキ
シブチレートと3−ヒドロキシバリレートの共重合体系
の樹脂等を例示することができる。本発明で混合して用
いることができる他の無機物としては、炭酸カルシウ
ム、炭酸マグネシウム、タルク、シリカ等を例示するこ
とができる。その他、上記範囲で低分子量ポリカプロラ
クトンの様なポリエステルを、可塑剤として添加するこ
とができ、艶消し剤、カーボンブラック等の顔料、酸化
防止剤(例えばヒンダードフェノール化合物、ヒンダー
ドアミン化合物、リン系化合物等)、紫外線吸収剤(例
えば、ベンゾフェノール化合物、ベンゾトリアゾール合
物、サリシレート化合物等)、また場合によっては架橋
性基を有する化合物を含ませることもできる。
If desired, the biodegradable film of the present invention may be mixed with other biodegradable resin components or inorganic substances. The mixing ratio of the above polyester resin composition and other components is such that the polyester resin composition is 40% by weight or more based on the obtained resin composition (the total of the other components and the polyester resin composition is 100% by weight). Is preferable, and particularly preferably 60% by weight or more. Examples of other biodegradable resin components that can be mixed and used in the present invention include polyvinyl alcohol-based resins and 3-hydroxybutyrate / 3-hydroxyvalerate copolymer-based resins. . Examples of other inorganic substances that can be mixed and used in the present invention include calcium carbonate, magnesium carbonate, talc, silica and the like. In addition, polyesters such as low molecular weight polycaprolactone in the above range can be added as a plasticizer, and matting agents, pigments such as carbon black, antioxidants (eg hindered phenol compounds, hindered amine compounds, phosphorus compounds Etc.), an ultraviolet absorber (for example, a benzophenol compound, a benzotriazole compound, a salicylate compound, etc.), and optionally a compound having a crosslinkable group.

【0015】本発明で使用するポリエステル樹脂組成物
は、脂肪族ポリエステル樹脂とポリカプロラクトンとを
混練することにより得られ、その混練方法としては、2
軸押し出し機等の常法の混練方法が問題なく使用でき
る。他の成分を配合する場合にも同様に混練により得る
ことができる。
The polyester resin composition used in the present invention is obtained by kneading an aliphatic polyester resin and polycaprolactone, and the kneading method is 2
A conventional kneading method such as a shaft extruder can be used without any problem. Similarly, when other components are mixed, they can be obtained by kneading.

【0016】本発明の生分解性フィルムは、上記ポリエ
ステル樹脂組成物を、その樹脂組成物の溶融温度以上で
溶融押し出しし、または溶液法により製造することがで
きる。必要に応じてインフレーション法、カレンダー
法、一軸延伸法、或いは二軸延伸法等により延伸製膜す
ることができる。なお、フィルムを延伸しスプリットヤ
ーンとし、これを織ったり編んだりして得たものも本発
明のフィルムの一態様に含まれる。
The biodegradable film of the present invention can be produced by melt-extruding the above polyester resin composition at a melting temperature of the resin composition or higher, or by a solution method. If necessary, the film can be stretched by an inflation method, a calendar method, a uniaxial stretching method, a biaxial stretching method, or the like. The film obtained by stretching the film into a split yarn and weaving or knitting the split yarn is also included in one aspect of the film of the present invention.

【0017】上記製膜法によって得られる生分解性フィ
ルムの厚さは、その目的に応じて種々の厚さのフィルム
とすることができる。包装用としては5乃至600μm
の厚さが好ましい。食料品、食器類、キャンプ用品等の
包装フィルムとして使用する場合は、5乃至200μm
の比較的薄いフィルムが好ましい。また、肥料用、米
袋、ゴミ回収袋等の袋として使用する場合は、100乃
至800μmの比較的厚いフィルムが好ましい。さら
に、農業用フィルムとして使用するには、5乃至800
μmの色々な厚みのフィルムを用途に応じて使用するこ
とができる。包装用フィルムとして使用する場合のフィ
ルム特性は、強度100kg/cm2以上、伸度10%
以上、好ましくは強度200kg/cm2以上、伸度2
0%以上である。
The thickness of the biodegradable film obtained by the above-mentioned film forming method may be various depending on the purpose. 5 to 600 μm for packaging
Is preferred. 5 to 200 μm when used as a packaging film for food, tableware, camping equipment, etc.
Of relatively thin films are preferred. When used as a bag for fertilizers, rice bags, garbage collection bags, etc., a relatively thick film of 100 to 800 μm is preferable. In addition, for use as an agricultural film, 5 to 800
Films with various thicknesses of μm can be used depending on the application. When used as a packaging film, the film has the following properties: strength 100 kg / cm 2 or more, elongation 10%.
Or above, preferably strength of 200 kg / cm 2 or above, elongation of 2
0% or more.

【0018】本発明の生分解性フィルムは、包装材、食
料品等の包装フィルム、農業用フィルム等に使用するこ
とができる。さらに、使用目的により、本発明の生分解
性フィルムを他のフィルムとの積層フィルムの形態で使
用することもできる。
The biodegradable film of the present invention can be used as a packaging material, a packaging film for foods, an agricultural film and the like. Furthermore, depending on the purpose of use, the biodegradable film of the present invention can be used in the form of a laminated film with another film.

【0019】[0019]

【実施例】以下、実施例により本発明を具体的に説明す
るが、本発明はこれらに限定されるものではない。
EXAMPLES The present invention will now be described specifically with reference to examples, but the present invention is not limited to these examples.

【0020】(実施例1)コハク酸と1,4−ブタンジ
オールとの脂肪族ポリエステル樹脂(数平均分子量7
0,000)100重量部にポリカプロラクトン(ダイ
セル化学工業社製「PLACCEL H7」)40重量
部を混練し、ポリエステル樹脂組成物を得た。これを2
00℃で溶融押し出しし、キャストして未延伸シートを
得た。これを80℃で縦方向に2倍、その後、横方向に
2倍の2軸延伸を行い、厚み50μmの生分解性フィル
ムを得た。得られた生分解性フィルムを土中に埋設し、
3か月経過後の外観観察を行った。また、生分解性フィ
ルム片を凍結粉砕してJIS K6950(1994)
の評価を行った。汚泥には都市下水汚泥を使用した。さ
らに、生分解性フィルムを滅菌水中に浸漬し、3か月経
過後の外観観察を行った。結果を表−1に示す。
Example 1 Aliphatic polyester resin of succinic acid and 1,4-butanediol (number average molecular weight 7
40 parts by weight of polycaprolactone (“PLACCEL H7” manufactured by Daicel Chemical Industries, Ltd.) was kneaded with 100 parts by weight of 10,000) to obtain a polyester resin composition. This is 2
It was melt extruded at 00 ° C. and cast to obtain an unstretched sheet. This was biaxially stretched twice at 80 ° C. in the machine direction and then twice in the transverse direction to obtain a biodegradable film having a thickness of 50 μm. Embed the obtained biodegradable film in the soil,
The appearance was observed after 3 months. In addition, the biodegradable film pieces are freeze-ground to JIS K6950 (1994).
Was evaluated. Municipal sewage sludge was used as the sludge. Furthermore, the biodegradable film was immersed in sterilized water and the appearance was observed after 3 months. The results are shown in Table 1.

【0021】(実施例2)コハク酸と1,4−ブタンジ
オールとの脂肪族ポリエステル樹脂(数平均分子量7
0,000)100重量部にポリカプロラクトン(ダイ
セル化学工業社製「PLACCEL H7」)15重量
部を混練し、ポリエステル樹脂組成物を得た。これを2
00℃で溶融押し出しし、キャストして未延伸シートを
得た。これを80℃で縦方向に2倍、その後、横方向に
2倍の2軸延伸を行い、厚み50μmの生分解性フィル
ムを得た。得られた生分解性フィルムについて実施例1
と同様の試験を行った。
Example 2 Aliphatic polyester resin of succinic acid and 1,4-butanediol (number average molecular weight 7
100 parts by weight of 10,000) and 15 parts by weight of polycaprolactone (“PLACCEL H7” manufactured by Daicel Chemical Industries, Ltd.) were kneaded to obtain a polyester resin composition. This is 2
It was melt extruded at 00 ° C. and cast to obtain an unstretched sheet. This was biaxially stretched twice at 80 ° C. in the machine direction and then twice in the transverse direction to obtain a biodegradable film having a thickness of 50 μm. Example 1 of the obtained biodegradable film
The same test was performed.

【0022】(実施例3)コハク酸と1,4−ブタンジ
オールとの脂肪族ポリエステル樹脂(数平均分子量7
0,000)100重量部にポリカプロラクトン(ダイ
セル化学工業社製「PLACCEL H7」)100重
量部を混練し、ポリエステル樹脂組成物を得た。これを
200℃で溶融押し出しし、キャストして未延伸シート
を得た。これを80℃で縦方向に2倍、その後、横方向
に2倍の2軸延伸を行い、厚み50μmの生分解性フィ
ルムを得た。得られた生分解性フィルムについて実施例
1と同様の試験を行った。
Example 3 Aliphatic polyester resin of succinic acid and 1,4-butanediol (number average molecular weight 7
100 parts by weight of polycaprolactone ("PLACCEL H7" manufactured by Daicel Chemical Industries, Ltd.) was kneaded with 100 parts by weight of 10,000) to obtain a polyester resin composition. This was melt extruded at 200 ° C. and cast to obtain an unstretched sheet. This was biaxially stretched twice at 80 ° C. in the machine direction and then twice in the transverse direction to obtain a biodegradable film having a thickness of 50 μm. The same test as in Example 1 was performed on the obtained biodegradable film.

【0023】(比較例1)コハク酸と1,4−ブタンジ
オールとの脂肪族ポリエステル樹脂(数平均分子量7
0,000)を200℃で溶融押し出しし、キャストし
て未延伸シートを得た。これを90℃で縦方向に2倍、
その後、横方向に2倍の2軸延伸を行い、厚み50μm
のフィルムを得た。得られたフィルムについて実施例1
と同様の試験を行った。
Comparative Example 1 Aliphatic polyester resin of succinic acid and 1,4-butanediol (number average molecular weight 7
50,000) was melt extruded at 200 ° C. and cast to obtain an unstretched sheet. Double this vertically at 90 ° C,
After that, the film is biaxially stretched twice in the transverse direction to a thickness of 50 μm.
Was obtained. Example 1 of the obtained film
The same test was performed.

【0024】[0024]

【表1】 [Table 1]

【0025】実施例より、本発明のフィルムは、微生物
が存在しない環境では分解が進まず、耐候性が高いこと
が分かった。一方、本発明のフィルムは微生物により著
しく分解され、ポリカプロラクトンの配合により脂肪族
ポリエステルの分解性が誘引されたことが判明した。
From the examples, it was found that the film of the present invention does not undergo decomposition in an environment where microorganisms do not exist and has high weather resistance. On the other hand, it was found that the film of the present invention was remarkably decomposed by microorganisms, and the degradability of the aliphatic polyester was induced by the addition of polycaprolactone.

【0026】[0026]

【発明の効果】本発明の生分解性フィルムは、優れた生
分解性を有すると共に優れた耐候性、機械強度も有して
いる。完全な生分解性を有しているので、使用後回収不
可能な用途に用いても自然環境下で分解し、環境公害等
の問題を引き起こすことがない。 このため、種々の包
装材料用途や農業用フィルムの用途に広く応用すること
が出来る。
The biodegradable film of the present invention has not only excellent biodegradability but also excellent weather resistance and mechanical strength. Since it has complete biodegradability, it decomposes in the natural environment even when it is used for applications that cannot be recovered after use, and does not cause problems such as environmental pollution. Therefore, it can be widely applied to various packaging materials and agricultural film applications.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 脂肪族ポリエステル樹脂100重量部に
対しポリカプロラクトン1乃至200重量部を配合した
ポリエステル樹脂組成物からなる生分解性フィルム。
1. A biodegradable film comprising a polyester resin composition in which 1 to 200 parts by weight of polycaprolactone is mixed with 100 parts by weight of an aliphatic polyester resin.
【請求項2】 脂肪族ポリエステル樹脂100重量部に
対しポリカプロラクトン1乃至200重量部を配合した
ポリエステル樹脂組成物を40重量%以上含有する生分
解性フィルム。
2. A biodegradable film containing 40% by weight or more of a polyester resin composition in which 1 to 200 parts by weight of polycaprolactone is mixed with 100 parts by weight of an aliphatic polyester resin.
JP2998896A 1995-06-22 1996-01-24 Biodegradable film Pending JPH09194702A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2998896A JPH09194702A (en) 1996-01-24 1996-01-24 Biodegradable film
US08/667,004 US5786408A (en) 1995-06-22 1996-06-20 Biodegradable polyester resin composition, and a biodegradable molded article
EP96401374A EP0750015B1 (en) 1995-06-22 1996-06-21 A biodegradable polyester resin composition, and a biodegradable molded article
DE69627929T DE69627929T2 (en) 1995-06-22 1996-06-21 Biodegradable polyester blend and biodegradable molded article
ES96401374T ES2198469T3 (en) 1995-06-22 1996-06-21 COMPOSITION OF BIODEGRADABLE POLYESTER AND BIODEGRADABLE MOLDED OBJECT.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2998896A JPH09194702A (en) 1996-01-24 1996-01-24 Biodegradable film

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2004045803A Division JP3759530B2 (en) 2004-02-23 2004-02-23 Biodegradable film

Publications (1)

Publication Number Publication Date
JPH09194702A true JPH09194702A (en) 1997-07-29

Family

ID=12291345

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2998896A Pending JPH09194702A (en) 1995-06-22 1996-01-24 Biodegradable film

Country Status (1)

Country Link
JP (1) JPH09194702A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999063001A1 (en) * 1998-05-30 1999-12-09 Daicel Chemical Industries, Ltd. Biodegradable polyester resin composition, biodisintegrable resin composition, and molded objects of these
JP2016537495A (en) * 2013-10-27 2016-12-01 ティパ コーポレイション リミティド Biodegradable sheet

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999063001A1 (en) * 1998-05-30 1999-12-09 Daicel Chemical Industries, Ltd. Biodegradable polyester resin composition, biodisintegrable resin composition, and molded objects of these
JP2016537495A (en) * 2013-10-27 2016-12-01 ティパ コーポレイション リミティド Biodegradable sheet
US10647093B2 (en) 2013-10-27 2020-05-12 Tipa Corp. Ltd. Biodegradable sheet
US11007758B2 (en) 2013-10-27 2021-05-18 Tipa Corp. Ltd Biodegradable sheet

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