JPH09111036A - Disposal method of biodegradable polyester resin molding - Google Patents
Disposal method of biodegradable polyester resin moldingInfo
- Publication number
- JPH09111036A JPH09111036A JP26958095A JP26958095A JPH09111036A JP H09111036 A JPH09111036 A JP H09111036A JP 26958095 A JP26958095 A JP 26958095A JP 26958095 A JP26958095 A JP 26958095A JP H09111036 A JPH09111036 A JP H09111036A
- Authority
- JP
- Japan
- Prior art keywords
- biodegradable polyester
- acid
- molded product
- molding
- polyester resin
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/16—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with inorganic material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
-
- 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
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Sustainable Development (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Biological Depolymerization Polymers (AREA)
Abstract
(57)【要約】
【課題】 生分解性ポリエステル系樹脂成形物の廃棄を
簡便かつ確実に行う方法を提供する。
【解決手段】 生分解性ポリエステルを主体とする樹脂
組成物を成形してなる成形物を、アルカリを主成分とす
る廃棄処理液によって接触分解させる生分解性ポリエス
テル系樹脂成形物の廃棄処理方法。(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide a method for easily and surely disposing a biodegradable polyester resin molded product. A method for discarding a biodegradable polyester resin molded product, in which a molded product obtained by molding a resin composition containing a biodegradable polyester as a main component is catalytically decomposed by a waste treatment liquid containing an alkali as a main component.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、生分解性ポリエス
テル系樹脂成形物の廃棄物を、該廃棄物が発生する場所
で分解処理する方法に関する。TECHNICAL FIELD The present invention relates to a method for decomposing a waste product of a biodegradable polyester resin molding at a place where the waste product is generated.
【０００２】[0002]
【従来の技術】プラスチック樹脂成形品は、産業用や家
庭用として汎用的に膨大な量が使用されている。これら
の成形物は、耐久性製品として長期間使用される場合も
あるが、一回限りの使い捨ての場合も多い。かかるプラ
スチック樹脂成形品は、ポリエチレン、ポリプロピレ
ン、ポリスチレン、ポリ塩化ビニル、ポリエチレンテレ
フタレート等に代表される非分解性樹脂から成形された
ものであり、不要となり廃棄された場合は焼却あるいは
投棄の処理方法しかない。焼却能力の制約から投棄され
た場合には、ゴミとして半永久的に残留し、景観や環境
を損なう深刻な社会問題となっている。2. Description of the Related Art A huge amount of plastic resin molded products is used for industrial and household purposes. These molded products may be used as durable products for a long period of time, but in many cases, they are single-use disposable products. Such a plastic resin molded article is molded from a non-decomposable resin typified by polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyethylene terephthalate, etc., and when it is no longer needed and is discarded, it can only be incinerated or discarded. Absent. When dumped due to restrictions on the incineration capacity, it remains semi-permanently as garbage, which is a serious social problem that damages the landscape and environment.
【０００３】特に、ＯＨＰ用シートは、プレゼンテーシ
ョン媒体として汎用的に使用されており、ＰＰＣ複写機
やインクジェット式プリンター等で複写印刷されてい
る。ＯＨＰ用シートは、長期間保存したり、繰り返して
使用することもあるが、短期または一回のみの使用で廃
棄処分されることも少なくない。複写印刷した内容の漏
洩の防止のためにシュレッダー等で裁断して廃棄処分し
た場合には、ゴミの嵩は一層増大し、問題の深刻度が高
まる。In particular, the OHP sheet is generally used as a presentation medium and is copied and printed by a PPC copying machine, an ink jet printer or the like. The OHP sheet may be stored for a long period of time or used repeatedly, but it is often disposed of after being used for a short period or only once. When the copy-printed contents are cut and discarded by a shredder or the like to prevent the leakage, the volume of the waste is further increased, and the seriousness of the problem is increased.
【０００４】一方、近年、廃棄物による環境問題を解決
するために、生分解性ポリマーが多数提案されている。
これらの生分解性ポリマーで成形したフィルム、ボト
ル、シート等の成形品は、投棄された地中や水中で経時
的に分解消失され、非生分解性ポリマーが引き起こして
いる深刻な環境問題を軽減する。したがって、プラスチ
ック成形物の材料として生分解性ポリマーを用いると、
環境問題が軽減するものと期待されている。On the other hand, in recent years, many biodegradable polymers have been proposed in order to solve environmental problems caused by waste.
Molded products such as films, bottles, sheets, etc. molded with these biodegradable polymers are decomposed and disappeared over time in the dumped ground or water, reducing the serious environmental problems caused by non-biodegradable polymers. To do. Therefore, when a biodegradable polymer is used as a material for a plastic molded article,
It is expected that environmental problems will be alleviated.
【０００５】しかし、生分解性ポリマーを用いても、廃
棄物が自然に分解消失するまでには比較的長期間を要
し、分解消失のための処分スペースも必要である。ま
た、事業所や家庭から発生する廃棄物を回収し搬送する
作業と、搬送に伴う排気ガス、騒音は、依然として軽減
されないという問題点が残る。したがって、本発明の目
的は、生分解性ポリエステルを主体とする不要の成形物
を、その成形物が発生する場所で簡便かつ確実に分解消
失させ、廃棄物の減量化と搬送作業の軽減を一挙に達成
することができる廃棄方法を提供することにある。However, even if a biodegradable polymer is used, it takes a relatively long time for the waste to decompose and disappear naturally, and a disposal space for the decomposition and disappearance is also required. Further, there is a problem that the work of collecting and transporting waste generated from business establishments and homes, and the exhaust gas and noise accompanying the transport are not yet reduced. Therefore, an object of the present invention is to easily and surely decompose and eliminate an unnecessary molded product mainly composed of biodegradable polyester at a place where the molded product is generated, thereby reducing the amount of waste and the transportation work. It is to provide a disposal method that can be achieved.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するた
め、請求項１に記載のプラスチック成形物の廃棄方法
は、生分解性ポリエステルを主体とする組成物を成形し
てなる成形物を、アルカリを主成分とする廃棄処理液に
よって接触分解させることを特徴とする。請求項２に記
載の生分解性ポリエステル系樹脂成形物の廃棄処理方法
は、生分解性ポリエステルを主体とする樹脂組成物を成
形してなる成形物を、アルカリを主成分とする廃棄処理
液によって接触分解させる工程と、該接触分解後の廃棄
処理液を中和する工程とからなることを特徴とする。請
求項３に記載の生分解性ポリエステル系樹脂成形物の廃
棄処理方法は、請求項１または請求項２に記載の方法で
あって、上記生分解性ポリエステルがポリ乳酸または乳
酸とヒドロキシカルボン酸の共重合体であることを特徴
とする。請求項４に記載の生分解性ポリエステル系樹脂
成形物の廃棄処理方法は、請求項１または請求項２に記
載の方法であって、生分解性ポリエステルを主体とする
樹脂組成物を成形してなる成形物の廃棄処理を、その成
形物の廃棄物の発生場所で行うことを特徴とする。請求
項５に記載の生分解性ポリエステル系樹脂成形物の廃棄
処理方法は、請求項１〜請求項４のいずれかに記載の方
法であって、生分解性ポリエステルを主体とする樹脂組
成物を成形してなる成形物がシートであることを特徴と
する。In order to solve the above-mentioned problems, the method for discarding a plastic molded article according to claim 1 is a method in which a molded article obtained by molding a composition containing a biodegradable polyester as a main component is treated with an alkali. It is characterized in that it is catalytically decomposed by a waste treatment liquid containing as a main component. The method for discarding a biodegradable polyester-based resin molded article according to claim 2, wherein a molded article obtained by molding a resin composition containing a biodegradable polyester as a main component is treated with a waste treatment liquid containing an alkali as a main component. It is characterized by comprising a step of catalytically decomposing and a step of neutralizing the waste treatment liquid after the catalytic decomposition. The method for discarding a biodegradable polyester-based resin molding according to claim 3 is the method according to claim 1 or 2, wherein the biodegradable polyester is polylactic acid or lactic acid and hydroxycarboxylic acid. It is characterized by being a copolymer. The method of disposing of the biodegradable polyester resin molding according to claim 4 is the method according to claim 1 or 2, wherein a resin composition mainly comprising biodegradable polyester is molded. It is characterized in that the waste treatment of the molded article is performed at the place where the waste of the molded article is generated. The method for discarding a biodegradable polyester resin molded article according to claim 5 is the method according to any one of claims 1 to 4, wherein a resin composition mainly comprising biodegradable polyester is used. The molded product obtained by molding is a sheet.
【０００７】以下、本発明を詳細に説明する。本発明の
方法に用いられる生分解性ポリエステル系樹脂組成物
は、生分解性ポリエステルを主体とし、必要に応じて改
質剤、充填剤等の添加剤が添加された組成物である。本
発明で用いる生分解性ポリエステルを具体的に挙げる
と、ポリ乳酸系ポリマー（ポリ乳酸または乳酸とヒドロ
キシカルボン酸の共重合体）が一般的である。ポリ乳酸
は、Ｌ−乳酸、Ｄ−乳酸、またはこれらの混合物を脱水
縮合して得られ、好ましくは乳酸の環状二量体であるラ
クチドを開環重合して得られる。ラクチドには、Ｌ−乳
酸の環状二量体であるＬ−ラクチド、Ｄ−乳酸の環状二
量体であるＤ−ラクチド、およびＬ−乳酸とＤ−乳酸と
が環状二量化したＤＬ−ラクチドがあるが、いずれを用
いてもよい。乳酸としては、Ｌ−乳酸、Ｄ−乳酸、また
はこれらの混合物が用いられる。ヒドロキシカルボン酸
としては、グリコール酸、３−ヒドロキシ酪酸、４−ヒ
ドロキシ酪酸、４−ヒドロキシ吉草酸、５−ヒドロキシ
吉草酸、６−ヒドロキシカプロン酸等が例示される。Hereinafter, the present invention will be described in detail. The biodegradable polyester resin composition used in the method of the present invention is a composition mainly composed of biodegradable polyester, to which additives such as modifiers and fillers are added, if necessary. Specific examples of the biodegradable polyester used in the present invention are generally polylactic acid-based polymers (polylactic acid or a copolymer of lactic acid and hydroxycarboxylic acid). Polylactic acid is obtained by dehydration condensation of L-lactic acid, D-lactic acid, or a mixture thereof, and is preferably obtained by ring-opening polymerization of lactide which is a cyclic dimer of lactic acid. Lactide includes L-lactide which is a cyclic dimer of L-lactic acid, D-lactide which is a cyclic dimer of D-lactic acid, and DL-lactide which is a cyclic dimer of L-lactic acid and D-lactic acid. However, any of them may be used. As lactic acid, L-lactic acid, D-lactic acid, or a mixture thereof is used. Examples of the hydroxycarboxylic acid include glycolic acid, 3-hydroxybutyric acid, 4-hydroxybutyric acid, 4-hydroxyvaleric acid, 5-hydroxyvaleric acid and 6-hydroxycaproic acid.
【０００８】ポリ乳酸系ポリマーの分子量は、特に限定
されないが、通常、重量平均分子量で３×１０4 〜１０
０×１０4 であり、好ましくは５×１０4 〜３０×１０
4 である。市販されているポリ乳酸系ポリマーとして
は、ラクティ（島津製作所社製）、レイシア（三井東圧
化学社製）、ＥＣＯＰＬＡ（カーギル社製）等がある。
ポリ乳酸系ポリマー以外の生分解性ポリエステルとして
は、グリコール／ジカルボン酸共重合体のビオノーレ
（昭和高分子社製）、ポリカプロラクトンのプラクセル
（ダイセル化学社製）およびトーン（日本ユニカー社
製）、３−ヒドロキシ酪酸／３−ヒドロキシ吉草酸共重
合体（微生物合成系ポリエステル）のバイオポール（ゼ
ネカ社製）等が例示される。The molecular weight of the polylactic acid-based polymer is not particularly limited, but it is usually 3 × 10 4 to 10 10 by weight average molecular weight.
0 × 10 4 , preferably 5 × 10 4 to 30 × 10
4 Examples of commercially available polylactic acid-based polymers include Lacty (manufactured by Shimadzu Corporation), LACEA (manufactured by Mitsui Toatsu Chemical Co., Inc.), and ECOPLA (manufactured by Cargill).
Examples of biodegradable polyesters other than polylactic acid-based polymers include glycol / dicarboxylic acid copolymer Bionore (manufactured by Showa High Polymer Co., Ltd.), polycaprolactone Praxel (manufactured by Daicel Chemical Company) and Tone (manufactured by Nippon Unicar), Examples thereof include -hydroxybutyric acid / 3-hydroxyvaleric acid copolymer (microbial synthetic polyester) Biopol (manufactured by Zeneca).
【０００９】ポリカプロラクトンは、結晶性熱可塑性プ
ラスチックであり、その重量平均分子量は、特に限定さ
れないが、好ましくは１×１０4 〜１０×１０4 であ
る。グリコール／ジカルボン酸の重量平均分子量は、特
に限定されないが、好ましくは５×１０4 〜３０×１０
4 である。微生物合成系ポリエステルの重量平均分子量
は、好ましくは３×１０5 〜２×１０6 である。これら
ポリ乳酸系ポリマーに代表される生分解性ポリエステル
は、生分解性が保持される範囲内で多元共重合、変性等
の改質を加えたものでもかまわない。Polycaprolactone is a crystalline thermoplastic and its weight average molecular weight is not particularly limited, but is preferably 1 × 10 4 to 10 × 10 4 . The weight average molecular weight of the glycol / dicarboxylic acid is not particularly limited, but is preferably 5 × 10 4 to 30 × 10 5.
4 The weight average molecular weight of the microbial synthetic polyester is preferably 3 × 10 5 to 2 × 10 6 . The biodegradable polyester typified by these polylactic acid-based polymers may be modified by multi-copolymerization, modification, etc. within a range in which biodegradability is maintained.
【００１０】成形物中の生分解性ポリエステルの含有量
は、一般的には５０重量％以上であり、好ましくは７５
重量％以上である。生分解性ポリエステルは、単独でま
たは２種以上を配合して用いることもできる。シート類
に透明性が必要な場合は、ポリ乳酸系ポリマーを単独で
または配合比率を高めて使用するのが望ましい。生分解
性ポリエステル以外の成形品の成分としては、可塑剤、
滑剤、改質剤、充填剤、熱安定剤、紫外線吸収剤、耐候
性改良剤、難燃剤、帯電防止剤、着色剤、抗菌剤、付香
剤、アンチブロッキング剤、発泡剤等が挙げられ、これ
らは、必要に応じて単独であるいは２種以上を併せて使
用される。さらには、ポリビニルアルコール系樹脂、澱
粉等の水溶性高分子やエチレン酢ビ共重合樹脂（ＥＶ
Ａ）、エチレンビニルアルコール共重合樹脂（ＥＶＯ
Ｈ）等の非生分解性熱可塑性樹脂、多糖類、ポリウレタ
ン、セルロース等のポリエステル系以外の生分解性ポリ
マーも必要に応じて単独であるいは２種以上で使用され
る。The content of the biodegradable polyester in the molded product is generally 50% by weight or more, preferably 75%.
% By weight or more. The biodegradable polyester may be used alone or in combination of two or more. When the sheets are required to have transparency, it is desirable to use the polylactic acid-based polymer alone or with an increased blending ratio. As components of molded products other than biodegradable polyester, plasticizer,
Lubricants, modifiers, fillers, heat stabilizers, ultraviolet absorbers, weather resistance improvers, flame retardants, antistatic agents, colorants, antibacterial agents, fragrances, antiblocking agents, foaming agents, and the like, These may be used alone or in combination of two or more as required. Furthermore, polyvinyl alcohol resins, water-soluble polymers such as starch, and ethylene vinyl acetate copolymer resins (EV
A), ethylene vinyl alcohol copolymer resin (EVO
Non-biodegradable thermoplastic resins such as H), biodegradable polymers other than polyesters such as polysaccharides, polyurethanes and celluloses may be used alone or in combination of two or more as required.
【００１１】本発明の方法に用いられる生分解性ポリエ
ステル系樹脂成形物は、上記組成物を押出成形、射出成
形、ブロー成形、プレス成形、発泡成形等の公知の成形
方法でフィルム、シート、フィラメント、容器、ビン、
緩衝材等に成形されたものであれば、形状や用途等を問
わず、全てが包含される。上記成形物の中では、印刷さ
れたＯＨＰ用シートが、直ちに廃棄処理して漏洩を防止
できる点で、本発明の方法を適用できる好適な例であ
る。The biodegradable polyester resin molded article used in the method of the present invention is a film, sheet or filament prepared by a known molding method such as extrusion molding, injection molding, blow molding, press molding or foam molding. , Container, bottle,
As long as they are molded into a cushioning material or the like, they are all included regardless of their shapes and uses. Among the above-mentioned molded products, the printed OHP sheet is a suitable example to which the method of the present invention can be applied, in that it can be immediately discarded to prevent leakage.
【００１２】次に、成形物の廃棄方法を具体的に説明す
る。まず、使用済みの成形物を、所定濃度のアルカリを
主成分とする廃棄処理液の入った廃棄処理用容器に投入
する。該成形物、とりわけシート類は、容易にアルカリ
加水分解されて短時間に分解され、その形体を消失させ
る。複数の該成形物を接触分解させた後の廃棄処理液
は、酸を主成分とする中和剤で中和した後、下水道等へ
放流すればよい。Next, the method of discarding the molded product will be specifically described. First, the used molded product is put into a disposal container containing a disposal liquid having a predetermined concentration of alkali as a main component. The molded products, especially the sheets, are easily alkali-hydrolyzed and decomposed in a short period of time to lose their form. The waste treatment liquid after catalytically decomposing a plurality of the molded products may be neutralized with a neutralizing agent having an acid as a main component, and then discharged into a sewer or the like.
【００１３】ここで、廃棄処理液の成分は、水酸化ナト
リウム、水酸化カリウム等のアルカリ金属の水酸化物、
水酸化マグネシウム、水酸化カルシウム、水酸化バリウ
ム、炭酸ナトリウム、炭酸カリウム等のアルカリ土類金
属の水酸化物、炭酸塩、アンモニア等の無機塩基、アミ
ン、ジアミン、アミジン、グアニジン等の有機塩基等の
アルカリが例示される。中でも、水酸化ナトリウム、水
酸化カリウム等の不揮発性の無機塩基から選択するのが
好ましい。Here, the components of the waste treatment liquid are alkali metal hydroxides such as sodium hydroxide and potassium hydroxide,
Alkaline earth metal hydroxides such as magnesium hydroxide, calcium hydroxide, barium hydroxide, sodium carbonate, potassium carbonate, carbonates, inorganic bases such as ammonia, organic bases such as amines, diamines, amidines, guanidines, etc. An example is alkali. Among them, it is preferable to select from nonvolatile inorganic bases such as sodium hydroxide and potassium hydroxide.
【００１４】廃棄処理液の濃度も特に限定されないが、
通常０．５〜１０重量％であり、好ましくは１〜５重量
％である。溶媒も特に限定されないが、経済性、簡便
性、安全性等を考慮すると、水溶液とするのが一般的で
ある。廃棄処理液には、必要に応じて、アルカリ以外に
着色剤、防腐剤等の添加剤を添加してもよい。廃棄処理
液は、予め調製されたものをそのままあるいは希釈して
も、計量した水道水等に添加して都度調製してもよい。
処理温度も特に限定する必要がなく、室温（１０〜３０
℃）でよい。ただし、高温ほど短時間に分解消失し効率
的である。浴比（溶液量／成形品量）も特に限定する必
要がなく、成形品の少なくとも一部が浸漬される量であ
ればよく、望ましくは全体が浸漬されるのがよい。ま
た、処理時間は、処理液の濃度、温度、成形物の種類等
の条件により異なるが、フィルム程度のものであれば数
日以内、厚みのあるもので１週間以内で処理することが
できる。Although the concentration of the waste treatment liquid is not particularly limited,
It is usually 0.5 to 10% by weight, preferably 1 to 5% by weight. The solvent is also not particularly limited, but it is generally an aqueous solution in consideration of economical efficiency, convenience, safety and the like. If necessary, additives such as colorants and preservatives may be added to the waste treatment liquid in addition to the alkali. The waste treatment liquid may be prepared as it is or may be diluted, or may be added to measured tap water or the like to be prepared each time.
The treatment temperature also need not be particularly limited, and may be room temperature (10 to 30
℃). However, the higher the temperature, the more efficiently it decomposes and disappears in a shorter time. The bath ratio (amount of solution / amount of molded product) does not need to be particularly limited as long as at least a part of the molded product can be dipped, and preferably the whole is dipped. The treatment time varies depending on the conditions such as the concentration of the treatment liquid, the temperature, and the type of the molded product, but it can be treated within a few days if it is about a film, and within a week if it is thick.
【００１５】廃棄処理用容器の材質および構造も特に限
定する必要がなく、耐アルカリ性の耐久性材料であれば
よい。例えば、ＰＶＣ、ＰＥ、ＡＢＳ、ＰＰ等のプラス
チック材料またはステンレス等の金属材料からなる転倒
しない安定な構造の容器であればよい。There is no particular limitation on the material and structure of the disposal container, as long as it is an alkali resistant and durable material. For example, a container having a stable structure that does not fall down may be made of a plastic material such as PVC, PE, ABS, PP or a metal material such as stainless steel.
【００１６】中和剤は、廃棄処理液を中和する酸を主成
分とするものであり、ギ酸、酢酸、クエン酸、シュウ
酸、酒石酸、安息香酸等のカルボン酸、ベンゼンスルホ
ン酸、パラトルエンスルホン酸等のスルホン酸、スルフ
ィン酸、フェノール、エノール、チオフェノール、イミ
ド、オキシム、芳香族スルホンアミド、第一級及び第二
級ニトロ化合物等の有機酸、あるいは塩酸、硝酸、硫
酸、炭酸、リン酸、ホウ酸等の無機酸が例示される。液
体または固体の酸から選択すればよい。必要に応じて酸
以外の添加剤を加えてもよい。なお、適切に中和が行え
るように、予め廃棄処理液の中和に必要な量をパックし
ておき、廃棄処理液とセットで使用することが、確実か
つ簡単に中和することができ、望ましい。The neutralizing agent is mainly composed of an acid that neutralizes the waste treatment liquid, and includes carboxylic acids such as formic acid, acetic acid, citric acid, oxalic acid, tartaric acid and benzoic acid, benzenesulfonic acid and paratoluene. Sulfonic acid such as sulfonic acid, sulfinic acid, phenol, enol, thiophenol, imide, oxime, aromatic sulfonamide, organic acid such as primary and secondary nitro compounds, or hydrochloric acid, nitric acid, sulfuric acid, carbonic acid, phosphorus An inorganic acid such as an acid or boric acid is exemplified. It may be selected from liquid or solid acids. You may add additives other than an acid as needed. It should be noted that, in order to perform appropriate neutralization, it is possible to pack the amount necessary for neutralization of the waste treatment liquid in advance and use it in a set with the waste treatment liquid, which can surely and easily neutralize, desirable.
【００１７】上記した如く、本発明の処理方法に廃棄物
が発生するその場所で簡便かつ確実に廃棄処理すること
ができ、廃棄物量の減量化、廃棄物の回収作業の軽減、
回収廃棄物の搬送に伴う排気ガス、騒音等の問題解決に
有効である。この方法は、高山、船、離島等の焼却、搬
送が困難な場所、条件で有効な手段である。あるいは、
直ちに処分できることにより、印刷物の内容の漏洩防止
等にも有効である。As described above, according to the treatment method of the present invention, it is possible to simply and surely dispose of waste at the place where waste is generated, reduce the amount of waste, and reduce the work of collecting waste.
It is effective in solving problems such as exhaust gas and noise associated with the transportation of collected waste. This method is effective in places and conditions where it is difficult to incinerate or transport high mountains, ships, or isolated islands. Or,
Being able to dispose of immediately is also effective in preventing leakage of the contents of printed matter.
【００１８】[0018]
【実施例】以下、実施例によって本発明をさらに詳細に
説明する。実施例 各種シート片（１０ｍｍ角）を、約１０ｍｌの水酸化ナ
トリウム水溶液（４重量％濃度）が入った密閉栓つきガ
ラスビン（外径２７ｍｍ、高さ５９ｍｍ）に浸漬し、室
温で静置した時の分解消失挙動を観察した。次いで、酢
酸で中和した時の状態を観察した。結果を表１に示す。
分解性に関する評価方法は、２４時間後および１週間後
の形状の保持の有無で、また中和時に関する評価方法
は、液性状の変化の有無を目視で判断した。The present invention will be described in more detail with reference to the following examples. Example When various sheet pieces (10 mm square) were immersed in a glass bottle (outer diameter: 27 mm, height: 59 mm) with a sealed stopper, which contained about 10 ml of an aqueous sodium hydroxide solution (4% by weight concentration), and allowed to stand at room temperature. The decomposition disappearance behavior of was observed. Then, the state when neutralized with acetic acid was observed. Table 1 shows the results.
The evaluation method for decomposability was the presence / absence of shape retention after 24 hours and 1 week, and the evaluation method for neutralization was visual observation for the presence / absence of change in liquid properties.
【００１９】[0019]
【表１】 [Table 1]
【００２０】 Ａ ：ＥＣＯＰＬＡ（カーギル社製，重量平均分子量１
６８，３００のポリ乳酸）を６”ロールで１４０℃×１
０分間混練りしたロールシートをプレスして１００ミク
ロンに調製したシート Ｂ ：ビオノーレ（昭和高分子社製，重量平均分子量６
９，３００のグリコール／脂肪族カルボン酸）を上記Ａ
と同様の方法で作成した１００ミクロンのシート Ｃ ：プラクセル（ダイセル化学社製，重量平均分子量
４５，２００のポリカプロラクトン）を上記Ａと同様の
方法で作成した１００ミクロンのシート Ｄ ：ＥＣＯＰＬＡ１００重量部にビオノーレ２０重量
部を配合して、上記Ａと同様の方法で作成した１００ミ
クロンのシート Ｅ ：ＥＣＯＰＬＡ１００重量部にエバスレン４５０Ｐ
（ＤＩＣ製）１０重量部を配合して、上記Ａと同様の方
法で作成した１００ミクロンのシート Ｆ ：ＰＰ製クリヤーホルダー ２００ミクロン Ｇ ：ＰＥＴ製ＯＨＰフィルム １００ミクロン Ｈ ：ＰＶＣの収縮フィルム ５０ミクロン Ｉ ：ＰＥのポリ袋 ８５ミクロンA: ECOPLA (manufactured by Cargill, weight average molecular weight 1
68,300 polylactic acid) 1 roll at 6 ℃ 140 ℃ × 1
A sheet prepared by pressing a roll sheet kneaded for 0 minutes to have a particle size of 100 μm B: Bionore (Showa High Polymer Co., Ltd., weight average molecular weight 6)
9,300 glycol / aliphatic carboxylic acid)
100 micron sheet prepared in the same manner as above C: Praxel (manufactured by Daicel Chemical Industries, polycaprolactone having a weight average molecular weight of 45,200) 100 micron sheet prepared in the same manner as above A D: ECOPLA 100 parts by weight 100 micron sheet prepared in the same manner as in the above A by blending 20 parts by weight of bionole E: 100 parts by weight of ECOPLA and Ebaslen 450P
100 parts of a sheet prepared by the same method as the above A by mixing 10 parts by weight (manufactured by DIC) F: PP clear holder 200 micron G: PET OHP film 100 micron H: PVC shrink film 50 micron I : PE plastic bag 85 micron
【００２１】[0021]
【発明の効果】本発明の成形物の廃棄方法によれば、成
形物の廃棄物が発生するその場所で該廃棄物の処理が簡
便かつ確実にでき、該廃棄物を事業所や家庭から回収し
搬送する必要がなくなる。また、成形物の廃棄による景
観や環境の破壊を解消することができる。さらに、ＯＨ
Ｐ用シートの場合には、シュレッダー等で裁断処分する
ことなしに確実に複写印刷の内容の漏洩を防止すること
ができる。EFFECTS OF THE INVENTION According to the method for discarding a molded article of the present invention, it is possible to easily and surely treat the waste at the place where the waste of the molded article is generated, and collect the waste from the business office or home. Then, there is no need to transport. In addition, it is possible to eliminate the destruction of the landscape and the environment due to the disposal of the molded product. Furthermore, OH
In the case of the P sheet, it is possible to reliably prevent the leakage of the content of the copy print without cutting and disposing with a shredder or the like.
Claims (5)
組成物を成形してなる成形物を、アルカリを主成分とす
る廃棄処理液によって接触分解させる生分解性ポリエス
テル系樹脂成形物の廃棄処理方法。1. A method for discarding a biodegradable polyester resin molded product, which comprises contact-decomposing a molded product obtained by molding a resin composition containing a biodegradable polyester as a main component with a waste treatment liquid containing an alkali as a main component. .
組成物を成形してなる成形物を、アルカリを主成分とす
る廃棄処理液によって接触分解させる工程と、該接触分
解後の廃棄処理液を中和する工程とからなる生分解性ポ
リエステル系樹脂成形物の廃棄処理方法。2. A step of catalytically decomposing a molded article obtained by molding a resin composition mainly composed of biodegradable polyester with a waste treatment liquid containing alkali as a main component, and a waste treatment liquid after the catalytic decomposition. A method for discarding a biodegradable polyester resin molded product, which comprises a step of neutralizing.
たは乳酸とヒドロキシカルボン酸の共重合体である請求
項１または請求項２に記載の生分解性ポリエステル系樹
脂成形物の廃棄処理方法。3. The method for discarding a biodegradable polyester resin molding according to claim 1, wherein the biodegradable polyester is polylactic acid or a copolymer of lactic acid and hydroxycarboxylic acid.
組成物を成形してなる成形物の廃棄処理を、その成形物
の廃棄物の発生場所で行うことを特徴とする請求項１ま
たは請求項２に記載の生分解性ポリエステル系樹脂成形
物の廃棄処理方法。4. The method according to claim 1, wherein the waste treatment of the molded product formed by molding the resin composition mainly composed of biodegradable polyester is carried out at the place where the waste product of the molded product is generated. 2. A method for discarding a biodegradable polyester resin molded article according to 2.
組成物を成形してなる成形物がシートである請求項１〜
請求項４のいずれかに記載の生分解性ポリエステル系樹
脂成形物の廃棄処理方法。5. A molded article obtained by molding a resin composition mainly comprising biodegradable polyester is a sheet.
A method for discarding the biodegradable polyester resin molded product according to claim 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26958095A JPH09111036A (en) | 1995-10-18 | 1995-10-18 | Disposal method of biodegradable polyester resin molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26958095A JPH09111036A (en) | 1995-10-18 | 1995-10-18 | Disposal method of biodegradable polyester resin molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09111036A true JPH09111036A (en) | 1997-04-28 |
Family
ID=17474349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26958095A Pending JPH09111036A (en) | 1995-10-18 | 1995-10-18 | Disposal method of biodegradable polyester resin molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09111036A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003524520A (en) * | 1999-11-19 | 2003-08-19 | アイソライザー カンパニー，インコーポレイティド | Method and system for treating waste streams containing water-soluble polymers |
| JP2004292705A (en) * | 2003-03-27 | 2004-10-21 | Kajima Corp | Biodegradable plastic processing method and system |
| WO2012001784A1 (en) * | 2010-06-30 | 2012-01-05 | 大阪瓦斯株式会社 | Polylactic acid decomposition method |
| JP2012523443A (en) * | 2009-04-14 | 2012-10-04 | ガラクティック・エス．エー． | Chemical recycling of PLA by alcoholysis |
-
1995
- 1995-10-18 JP JP26958095A patent/JPH09111036A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003524520A (en) * | 1999-11-19 | 2003-08-19 | アイソライザー カンパニー，インコーポレイティド | Method and system for treating waste streams containing water-soluble polymers |
| JP2004292705A (en) * | 2003-03-27 | 2004-10-21 | Kajima Corp | Biodegradable plastic processing method and system |
| JP2012523443A (en) * | 2009-04-14 | 2012-10-04 | ガラクティック・エス．エー． | Chemical recycling of PLA by alcoholysis |
| WO2012001784A1 (en) * | 2010-06-30 | 2012-01-05 | 大阪瓦斯株式会社 | Polylactic acid decomposition method |
| US9174912B2 (en) | 2010-06-30 | 2015-11-03 | Osaka Gas Co., Ltd. | Polylactic acid decomposition method |
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