JPH09194700A - Biodegradable molding - Google Patents
Biodegradable moldingInfo
- Publication number
- JPH09194700A JPH09194700A JP2998996A JP2998996A JPH09194700A JP H09194700 A JPH09194700 A JP H09194700A JP 2998996 A JP2998996 A JP 2998996A JP 2998996 A JP2998996 A JP 2998996A JP H09194700 A JPH09194700 A JP H09194700A
- Authority
- JP
- Japan
- Prior art keywords
- polyester resin
- polycaprolactone
- biodegradable
- molding
- weight
- 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
Abstract
Description
【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
分解性に優れる成形体であって、機械強度特性、耐候性
に優れる生分解性成形体に関する。TECHNICAL FIELD The present invention relates to a biodegradable molded article comprising a resin composition of an aliphatic polyester resin and polycaprolactone, which is excellent in biodegradability and is excellent in mechanical strength characteristics and weather resistance. .
【０００２】[0002]
【従来の技術】従来より、ボトル、トレイ、ポット等の
日用品の成形材料として、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の汎用プラスチック材料が
大量に使われ、消費されている。2. Description of the Related Art Conventionally, a large amount of general-purpose plastic materials such as aromatic polyesters and polyamides represented by polyethylene, polypropylene, polyethylene terephthalate, etc. have been used and consumed as molding materials for daily necessities such as bottles, trays and pots. ing.
【０００３】これらはリサイクルされる物もあるが、一
般に回収された後、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
る場合がある。特に上記のポリエチレン等のポリマーに
は全くといってよいほど生分解性が無く、放置された状
態で半永久的に残存し、環境保全の点で問題が生じる。
また回収した成形体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、成形体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。Although some of these are recycled, they are generally recovered and then subjected to treatments such as incineration and burial. However, it takes a lot of labor and cost to collect,
Alternatively, it may be left uncollected because it is difficult to collect. In particular, the above-mentioned polymers such as polyethylene are not so biodegradable at all, and remain semi-permanently when left unattended, which causes a problem in terms of environmental protection.
Further, when incinerating the collected molded body, there is a possibility that high calorie combustion heat is generated or corrosive gas is generated and the incinerator is damaged. Furthermore, if the molded body is buried in the soil, it will remain in the soil semipermanently if the molded body is difficult to decompose.
【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、成形体の機械強度
が低下し、場合によっては成形体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、結局は成形体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 a biodegradable component such as starch lowers the mechanical strength of the molded product, and in some cases the molded product cannot retain its shape. Moreover, the admixed starch itself has decomposability, but it does not induce the decomposition of the polymer part other than starch in the decomposition process, and eventually the molded product becomes disjointed, but it is simply cut into fine pieces. It does not solve the essential 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、高分子量化
にするのは困難である。従って得られた成形体の機械強
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、得られた成形体等の分解が遅くな
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成形体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. For this reason, depolymerization of the polyester resin, which originally has poor heat stability, occurs, and it is difficult to increase the molecular weight. Therefore, the mechanical strength characteristics of the obtained molded product become insufficient, and it becomes 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. Although high mechanical strength characteristics can be ensured by increasing the molecular weight, on the other hand, decomposition of the obtained molded product or the like may be delayed. Under such circumstances, there is an increasing demand for a molded article 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
からなる成形体が、従来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成形体となることを
見い出し、本発明を完成するに至った。Means for Solving the Problems The inventors of the present invention have conducted extensive studies on a composition composed of an aliphatic polyester resin, and as a result, a molded product composed of a resin composition containing a predetermined amount of polycaprolactone has been used in conventional applications. It has mechanical strength characteristics and weather resistance that can be substituted without any problems, and found that the incorporation of polycaprolactone induces the biodegradation of the aliphatic polyester resin, resulting in a molded article exhibiting 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
解性形体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２０
重量％以上含有する生分解性成形体を提供する物であ
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.
The present invention provides a biodegradable form comprising a polyester resin composition mixed with parts by weight. Further, 20 parts of a polyester resin composition prepared by mixing 1 to 200 parts by weight of polycaprolactone with 100 parts by weight of an aliphatic polyester resin is used.
The present invention is to provide a biodegradable molded article containing at least wt%. 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５０，０００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以上では生分解性成形
体の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 50,000 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 manufacturing process of the biodegradable molded product, 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２００，
０００の範囲、特に好ましくは５，０００乃至１００，
０００の範囲である。尚、２００，０００よりも大きい
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 polycaprolactone is preferably 1,000 to 200,
000, particularly preferably 5,000 to 100,
000. Although polycaprolactone having a number average molecular weight of more 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
優れる生分解性成形体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 biodegradable molded article having excellent biodegradability, mechanical strength characteristics and weather resistance can be obtained.
【００１４】本発明の生分解性成形体には、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２０重量％以上であることが好ま
しく、特に好ましくは３０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化合
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 necessary, other biodegradable resin components or inorganic substances can be mixed in the biodegradable molded product of the present invention. The mixing ratio of the above-mentioned polyester resin composition and other components is such that the polyester resin composition is 20% by weight or more with respect to the obtained resin composition (the total of the other components and the polyester resin composition is 100% by weight). Is preferable, and particularly preferably 30% 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. . Other inorganic substances that can be mixed and used in the present invention include calcium carbonate,
Examples thereof include 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】本発明の生分解性成形体は、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、射出成形、ブロー成形、注型加工、真空
成形、カレンダー成形、発泡成形等の各種成型方法によ
り製造することができる。The biodegradable molded article of the present invention is obtained by melt-extruding the above polyester resin composition at a melting temperature of the resin composition or higher, and injection molding, blow molding, casting, vacuum molding, calender molding, foaming. It can be manufactured by various molding methods such as molding.
【００１７】このような成型方法で得られる生分解性成
形体は、その目的により、要求される機械特性は異なる
が、その強度は５ＭＰａ以上、伸度は０．５％以上であ
ることが好ましい。伸度が０．５％を下回ると生分解性
成形体の物性が劣る場合がある。好ましくは強度１５Ｍ
Ｐａ以上、伸度１．０％以上である。The biodegradable molded product obtained by such a molding method has different mechanical properties required depending on its purpose, but the strength is preferably 5 MPa or more and the elongation is preferably 0.5% or more. . If the elongation is less than 0.5%, the physical properties of the biodegradable molded product may deteriorate. 15M strength
Pa or more and elongation of 1.0% or more.
【００１８】本発明の生分解性成形体は、厚さ８００μ
ｍ以下のフィルムおよび繊維をのぞくものであって、ボ
トル、トレイ、カップ、苗木用ポット等のポット類、ナ
イフ、スプーン、フォーク、割り箸、ストロー等の飲食
用具、パイプ、芝生の仮止め材、コンテナー、注射器、
ドレーンチャンネル等に使用することができるが、これ
らに限定されるものではない。The biodegradable molded product of the present invention has a thickness of 800 μm.
Except for films and fibers of m or less, pots such as bottles, trays, cups, pots for seedlings, eating and drinking tools such as knives, spoons, forks, chopsticks, straws, pipes, temporary fixing materials for lawns, containers ,Syringe,
It can be used for drain channels and the like, but is not limited thereto.
【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、
射出成形機（東芝機械製ＩＳ １００Ｅ：型締め圧１０
０トン）にて、樹脂温度２００℃、金型温度３０℃、射
出圧力７００ｋｇｆ／ｃｍ2、射出速度６０ｃｍ3／ＳＥ
Ｃの射出成形条件で、大きさ１２０×６０ｍｍ、深さ１
５ｍｍのトレイを作製した。得られた成形体を土中に埋
設し、３か月経過後の外観観察を行った。また、成形体
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、得られた成形体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,
Injection molding machine (TOSHIBA MACHINE IS 100E: Clamping pressure 10
0 ton), resin temperature 200 ° C., mold temperature 30 ° C., injection pressure 700 kgf / cm 2 , injection speed 60 cm 3 / SE
Under C injection molding conditions, size 120 x 60 mm, depth 1
A 5 mm tray was made. The obtained molded body was embedded in soil and the appearance was observed after 3 months. Further, the molded piece was freeze-pulverized and evaluated according to JIS K6950 (1994). Municipal sewage sludge was used as the sludge. Further, the obtained molded body was dipped 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。この樹脂
組成物から実施例１と同様にしてトレイを作製した。得
られたトレイについて実施例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. A tray was produced from this resin composition in the same manner as in Example 1. The same test as in Example 1 was performed on the obtained tray.
【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。この樹
脂組成物から実施例１と同様にしてトレイを作製した。
得られたトレイについて実施例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. A tray was produced from this resin composition in the same manner as in Example 1.
The same test as in Example 1 was performed on the obtained tray.
【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、この樹脂組成
物から実施例１と同様にしてトレイを作製した。得られ
たトレイについて実施例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
10,000) was melt extruded at 200 ° C., and a tray was prepared from this resin composition in the same manner as in Example 1. The same test as in Example 1 was performed on the obtained tray.
【００２４】[0024]
【表１】 [Table 1]
【００２５】実施例より、本発明の生分解性成形体は、
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、本発明の生分解性成形体は微
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, the biodegradable molded article of the present invention is
It was found that in an environment where no microorganisms exist, decomposition does not proceed and weather resistance is high. On the other hand, it was revealed that the biodegradable molded product of the present invention was significantly decomposed by microorganisms, and the degradability of the aliphatic polyester was induced by the addition of polycaprolactone.
【００２６】[0026]
【発明の効果】本発明の生分解性成形体は、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。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、種々の生分解性成形
体の用途に広く応用することができる。The biodegradable molded article of the present invention has not only excellent biodegradability but also excellent weather resistance and mechanical strength. Since it has 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 biodegradable molded articles.
Claims (2)
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成形体。1. A biodegradable molding 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.
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２０重量％以上含有する生分
解性成形体。2. A biodegradable molded product containing 20% 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.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02998996A JP3905569B2 (en) | 1996-01-24 | 1996-01-24 | Biodegradable molded product |
| US08/667,004 US5786408A (en) | 1995-06-22 | 1996-06-20 | 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 |
| EP96401374A EP0750015B1 (en) | 1995-06-22 | 1996-06-21 | A biodegradable polyester resin composition, and a 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 |
|---|---|---|---|
| JP02998996A JP3905569B2 (en) | 1996-01-24 | 1996-01-24 | Biodegradable molded product |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2004045811A Division JP2004211099A (en) | 2004-02-23 | 2004-02-23 | Biodegradable molded article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09194700A true JPH09194700A (en) | 1997-07-29 |
| JP3905569B2 JP3905569B2 (en) | 2007-04-18 |
Family
ID=12291372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02998996A Expired - Fee Related JP3905569B2 (en) | 1995-06-22 | 1996-01-24 | Biodegradable molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3905569B2 (en) |
-
1996
- 1996-01-24 JP JP02998996A patent/JP3905569B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3905569B2 (en) | 2007-04-18 |
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