JP3148367B2 - Recovered paper storage container - Google Patents
Recovered paper storage containerInfo
- Publication number
- JP3148367B2 JP3148367B2 JP17978092A JP17978092A JP3148367B2 JP 3148367 B2 JP3148367 B2 JP 3148367B2 JP 17978092 A JP17978092 A JP 17978092A JP 17978092 A JP17978092 A JP 17978092A JP 3148367 B2 JP3148367 B2 JP 3148367B2
- Authority
- JP
- Japan
- Prior art keywords
- lactic acid
- acid
- container
- production example
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/10—Waste collection, transportation, transfer or storage, e.g. segregated refuse collecting, electric or hybrid propulsion
-
- 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
- Y02W30/64—Paper recycling
Description
【０００１】[0001]
【産業上の利用分野】本発明は回収古紙の収容容器に関
する。さらに詳しくは、乳酸ポリマーを主体とする熱可
塑性ポリマーでできたアルカリ溶液中での分解性を有す
る回収古紙収納容器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container for storing recovered waste paper. More specifically, the present invention relates to a recovered waste paper storage container made of a thermoplastic polymer mainly composed of a lactic acid polymer and decomposable in an alkaline solution.
【０００２】[0002]
【従来の技術】近年、森林資源の保護のために一度使っ
た後の紙は再びパルプ原料として回収利用されることが
多くなった。従来、これら回収古紙収納容器としてはポ
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、ポリ塩化ビニル等の樹脂類または紙から作られた
物が用いられている。2. Description of the Related Art In recent years, paper once used for the protection of forest resources has often been recovered and used again as a pulp raw material. Conventionally, containers made of resins such as polyethylene, polypropylene, polyethylene terephthalate, and polyvinyl chloride, or paper have been used as the storage containers for these recovered used papers.
【０００３】しかし樹脂から製造された収納容器は、古
紙からパルプを回収するアルカリ溶液中での分解性が無
いためパルプ回収の工程に共する際に中の古紙を取り出
し分離する必要があった。また、紙でできた物は内容物
の古紙と共にパルプ回収工程に共することが出来るが、
耐水性が劣り、また透明性が無いために内容物の確認が
できないという問題がある。[0003] However, since the storage container made of resin has no decomposability in an alkaline solution for recovering pulp from waste paper, it is necessary to take out and separate the waste paper in the pulp recovery process. In addition, the product made of paper can be used in the pulp recovery process together with the waste paper of the content,
There is a problem that the content cannot be confirmed due to poor water resistance and lack of transparency.
【０００４】一方、熱可塑性樹脂で分解性のあるポリマ
ーとして、ポリ乳酸または乳酸とその他のヒドロキシカ
ルボン酸のコポリマー（以下乳酸系ポリマーと略称す
る）が開発されている。これらのポリマーは、動物の体
内で数カ月から１年で１００％分解し、又、土壌や海水
中に置かれた場合、湿った環境下では数週間で分解を始
め１年から数年で消滅し、さらに分解生成物は、人体に
無害な乳酸と二酸化炭素と水になるという特性を有して
いる。On the other hand, polylactic acid or a copolymer of lactic acid and another hydroxycarboxylic acid (hereinafter abbreviated as a lactic acid-based polymer) has been developed as a decomposable polymer with a thermoplastic resin. These polymers degrade 100% in the body of animals in months to a year, and when placed in soil or seawater, begin to degrade in a few weeks in moist environments and disappear in one to several years. In addition, the decomposition products have the property of becoming lactic acid, carbon dioxide, and water that are harmless to the human body.
【０００５】ポリ乳酸は、通常ラクタイドと呼ばれる乳
酸の環状２量体から合成され、その製造法に関してはＵ
ＳＰ１，９９５，９７０、ＵＳＰ２，３６２，５１１、
ＵＳＰ２，６８３，１３６に開示されている。また乳酸
とその他のヒドロキシカルボン酸のコポリマーは、通常
乳酸の環状２量体であるラクタイドとヒドロキシカルボ
ン酸の環状エステル中間体（通常グリコール酸の２量体
であるグリコライド）から合成され、その製造方法に関
しては、ＵＳＰ３，６３６，９５６とＵＳＰ３，７９
７，４９９に開示されている。[0005] Polylactic acid is synthesized from a cyclic dimer of lactic acid, usually called lactide.
SP1,995,970, USP2,362,511,
No. 2,683,136. Also, a copolymer of lactic acid and another hydroxycarboxylic acid is synthesized from a cyclic ester intermediate of lactide, which is a cyclic dimer of lactic acid, and a cyclic ester of hydroxycarboxylic acid (glycolide, which is a dimer of glycolic acid). Regarding the method, USP 3,636,956 and USP 3,795
7,499.
【０００６】しかし、上記乳酸系ポリマーを用いた、内
容物である古紙と分離する必要がなく一緒にパルプ回収
工程に共することが出来る回収古紙収納容器は知られて
いなかった。However, there has been no known recovered paper storage container using the above-mentioned lactic acid-based polymer, which can be used together with the pulp recovery step without having to separate the recovered paper as the content.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、内容物であ
る古紙と共にパルプ回収工程に共することが出来る回収
古紙収納容器を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a container for storing used waste paper which can be used in a pulp collecting process together with used waste paper as contents.
【０００８】[0008]
【課題を解決するための手段】本発明者らは、上記課題
を解決するために鋭意検討した結果、乳酸系ポリマーが
アルカリ溶液中で容易に分解して消滅することを見いだ
し本発明を完成したものである。Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above problems, and as a result, have found that a lactic acid-based polymer is easily decomposed and disappeared in an alkaline solution, and completed the present invention. Things.
【０００９】即ち、本発明は、ポリ乳酸または乳酸とヒ
ドロキシカルボン酸のコポリマーを主成分とする熱可塑
性ポリマー組成物でできた回収古紙収納容器である。That is, the present invention is a container for storing recovered waste paper made of a thermoplastic polymer composition containing polylactic acid or a copolymer of lactic acid and hydroxycarboxylic acid as a main component.
【００１０】本発明に用いられるポリマーは、ポリ乳酸
系ポリマーが主成分として用いられ、その他のヒドロキ
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用
いられる。As the polymer used in the present invention, a polylactic acid-based polymer is used as a main component, and other hydroxycarboxylic acids include glycolic acid, 3-hydroxybutyric acid, 4-hydroxybutyric acid, 4-hydroxyvaleric acid,
-Hydroxyvaleric acid, 6-hydroxycaproic acid and the like are used.
【００１１】ポリ乳酸系ポリマーは、乳酸または乳酸と
他のヒドロキシカルボン酸から直接脱水重縮合するか、
乳酸の環状２量体であるラクタイドまたはヒドロキシカ
ルボン酸の環状エステル中間体、例えばグリコール酸の
２量体であるグリコライド（ＧＬＤ）や６−ヒドロキシ
カプロン酸の環状エステルであるε−カプロラクトン
（ＣＬ）等の共重合可能なモノマーを適宜用いて開環重
合させた物でもよい。原料としての乳酸は、Ｌ−乳酸ま
たはＤ−乳酸またはそれらの混合物のいずれでもよい。The polylactic acid-based polymer may be directly dehydrated and polycondensed from lactic acid or lactic acid and another hydroxycarboxylic acid,
Lactide as a cyclic dimer of lactic acid or cyclic ester intermediate of hydroxycarboxylic acid, for example, glycolide (GLD) as a dimer of glycolic acid or ε-caprolactone (CL) as a cyclic ester of 6-hydroxycaproic acid And the like, and may be a product obtained by ring-opening polymerization using a copolymerizable monomer as appropriate. Lactic acid as a raw material may be either L-lactic acid or D-lactic acid or a mixture thereof.
【００１２】乳酸系ポリマーには、通常公知の熱可塑性
ポリマーまたは可塑剤、さらに各種の改質剤を用いて、
熱可塑性ポリマー組成物とする。公知の熱可塑性ポリマ
ーとしては、ポリグリコール酸、ポリε−カプロラクト
ン等の分解性の物が好ましい。熱可塑性ポリマー組成物
中の乳酸系ポリマーの占める割合は、目的とする分解性
より任意の割合の物が用いられるが、一般的には５０％
以上が好ましい。又熱可塑性ポリマー組成物の製造は、
公知の混練技術はすべて適用できるが、組成物の形状は
ペレット、棒状、紛状等で用いられる。The lactic acid-based polymer can be prepared by using a generally known thermoplastic polymer or a plasticizer and various modifiers.
It is a thermoplastic polymer composition. As the known thermoplastic polymer, a decomposable substance such as polyglycolic acid and polyε-caprolactone is preferable. The proportion of the lactic acid-based polymer in the thermoplastic polymer composition may be an arbitrary proportion depending on the intended degradability, but is generally 50%.
The above is preferred. The production of the thermoplastic polymer composition
All known kneading techniques can be applied, but the composition is used in the form of pellets, rods, powders, and the like.
【００１３】本発明の回収古紙収納容器は、通常の加工
方で製造される箱、袋、網等どのような形状のものでも
よい。本発明による熱可塑性ポリマー組成物を用いて容
器を得るには、該組成物を押出機で加熱溶融し、ダイか
らチューブ状に押出し、内部に吹き込まれた空気によっ
て薄いフィルムに膨張され、空気で冷却固化した後にロ
ールに巻取る（インフレーション加工）方法で得られた
筒状のフィルムを適当な長さにカットすると同時に一端
をシールする方法が一般的であるが、この他、押出し成
形法により得られたフィルムを袋状にシールする方法
等、いずれの方法でも構わない。The used waste paper container of the present invention may have any shape such as a box, a bag, a net and the like manufactured by a usual processing method. To obtain a container using the thermoplastic polymer composition according to the present invention, the composition is heated and melted by an extruder, extruded into a tube from a die, expanded into a thin film by air blown into the inside, and expanded with air. After cooling and solidifying, it is common to cut a cylindrical film obtained by winding it into a roll (inflation processing) to an appropriate length and seal one end at the same time. Any method such as a method of sealing the obtained film in a bag shape may be used.
【００１４】本発明の乳酸系ポリマーのインフレーショ
ン成形による容器の成形条件は成形機、ポリマーの種類
等によって適宜決定されるが、そのいくつかを例示す
る。例えば、インフレーション加工の場合は、下記の条
件が使用される。 押出し機 ；４０ｍｍφ ダイス ；６５ｍｍφ 冷却環 ；スリット式１段 押出し成形温度 ；１７０〜２５０℃ 押出し量 ；４ｋｇ／Ｈｒ 膨張比 ；２〜４The conditions for molding the container by inflation molding of the lactic acid-based polymer of the present invention are appropriately determined depending on the molding machine, the type of the polymer, and the like. For example, in the case of inflation processing, the following conditions are used. Extruder; 40 mmφ die; 65 mmφ cooling ring; slit type single-stage extrusion molding temperature: 170-250 ° C. Extruded amount: 4 kg / Hr Expansion ratio: 2-4
【００１５】[0015]
製造例１ Ｌ−ラクタイド１０ｋｇ（１．５モル）およびオクタン
酸スズ０．０１重量％と、ラウリルアルコール０．０３
重合％を、攪拌機を備えた肉厚の円筒型ステンレス製重
合容器へ封入し、真空で２時間脱気した後窒素ガスで置
換した。この混合物を窒素雰囲気下で攪拌しつつ２００
℃で３時間加熱した。温度をそのまま保ちながら、排気
管及びガラス製受器を介して真空ポンプにより徐々に脱
気し反応容器内を３ｍｍＨｇまで減圧にした。脱気開始
から１時間後、モノマーや低分子量揮発分の留出がなく
なったので、容器内を窒素置換し、容器下部からポリマ
ーを紐状に抜き出してペレット化し、ポリＬ−乳酸を得
た。このポリマーの分子量は約１０万であった。Production Example 1 L-lactide 10 kg (1.5 mol), tin octoate 0.01% by weight, lauryl alcohol 0.03
The polymerization% was sealed in a thick-walled cylindrical stainless steel polymerization vessel equipped with a stirrer, degassed under vacuum for 2 hours, and then replaced with nitrogen gas. The mixture is stirred for 200 hours under a nitrogen atmosphere.
Heated at C for 3 hours. While maintaining the temperature as it was, the air was gradually degassed by a vacuum pump through an exhaust pipe and a glass receiver, and the pressure inside the reaction vessel was reduced to 3 mmHg. One hour after the start of degassing, the distillation of the monomer and low-molecular-weight volatile components disappeared. Therefore, the inside of the container was replaced with nitrogen, and the polymer was drawn out from the lower part of the container in a string form and pelletized to obtain poly L-lactic acid. The molecular weight of this polymer was about 100,000.
【００１６】製造例２ Ｌ−ラクタイド１０ｋｇをＬ−ラクタイド５ｋｇとＤ−
ラクタイド５ｋｇに変えたほかは製造例１と同様にして
ペレット化し、ポリＤＬ−乳酸を得た。このポリマーの
分子量は約１０万であった。Production Example 2 10 kg of L-lactide was combined with 5 kg of L-lactide and D-lactide.
Pelletization was performed in the same manner as in Production Example 1 except that the lactide was changed to 5 kg to obtain poly-DL-lactic acid. The molecular weight of this polymer was about 100,000.
【００１７】製造例３〜４ Ｌ−ラクタイド１０ｋｇをＬ−ラクタイド５ｋｇとヒド
ロキシカルボン酸成分５ｋｇに変えた他は製造例１と同
様にペレット化し、Ｌ−ラクタイドとヒドロキシカルボ
ン酸共重合体を得た。ヒドロキシカルボン酸性分がグリ
コライドの場合を製造例３（平均分子量１０万）、同じ
くヒドロキシカルボン酸性分がε−カプロラクトンの場
合を製造例４（平均分子量７万）とした。Production Examples 3-4 Pelletization was carried out in the same manner as in Production Example 1 except that 10 kg of L-lactide was changed to 5 kg of L-lactide and 5 kg of a hydroxycarboxylic acid component to obtain a copolymer of L-lactide and hydroxycarboxylic acid. . Production Example 3 (average molecular weight 100,000) was used when the hydroxycarboxylic acid component was glycolide, and Production Example 4 (average molecular weight 70,000) was used when the hydroxycarboxylic acid component was ε-caprolactone.
【００１８】尚、ポリマーの平均分子量（重量平均分子
量）はポリスチレンを標準としてゲルパーミエーション
クロマトグラフィーにより以下の条件で測定した。 装置 ：島津ＬＣ−１０ＡＤ 検出器：島津ＲＩＤ−６Ａ カラム：日立化成ＧＬ−Ｓ３５０ＤＴ−５、ＧＬ−Ｓ３
７０ＤＴ−５ 溶媒 ：クロロホルム 濃度 ：１％ 注入量：２０μｌ 流速 ：１．０ｍｌ／ｍｉｎThe average molecular weight (weight average molecular weight) of the polymer was measured by gel permeation chromatography using polystyrene as a standard under the following conditions. Apparatus: Shimadzu LC-10AD Detector: Shimadzu RID-6A Column: Hitachi Chemical GL-S350DT-5, GL-S3
70DT-5 Solvent: chloroform Concentration: 1% Injection volume: 20 μl Flow rate: 1.0 ml / min
【００１９】実施例１ 製造例１で得られたポリＬ−乳酸と、製造例２で得られ
たポリＤＬ−乳酸を８０：２０で混合し、６５ｍｍφの
ダイスとスリット式１段の冷却環を備えた４０ｍｍφの
押出し機を用い、押出し量４ｋｇ／Ｈｒ、押出し温度２
００℃でインフレーション加工することにより厚さ４０
μｍ、折径３００ｍｍの円筒状フィルムを得た。このフ
ィルムを長さ３００ｍｍにカットし、一端をヒートシー
ルして袋状の容器を得た。Example 1 The poly-L-lactic acid obtained in Production Example 1 and the poly-DL-lactic acid obtained in Production Example 2 were mixed at a ratio of 80:20. Using an extruder with a diameter of 40 mm provided, an extrusion amount of 4 kg / Hr and an extrusion temperature of 2
Thickness of 40 by inflation at 00 ° C
A cylindrical film having a size of 300 μm and a folded diameter of 300 mm was obtained. This film was cut into a length of 300 mm, and one end was heat-sealed to obtain a bag-shaped container.
【００２０】実施例２ 製造例１で得られたポリＬ−乳酸と、製造例２で得られ
たポリＤＬ−乳酸を５０：５０で混合し、押出し温度を
１９０℃にした以外は実施例１と同様にして厚さ４０μ
ｍ、折径３００ｍｍの円筒状フィルムを得た。このフィ
ルムを長さ３００ｍｍにカットし、一端をヒートシール
して袋状の容器を得た。Example 2 Example 1 was repeated except that the poly-L-lactic acid obtained in Production Example 1 and the poly-DL-lactic acid obtained in Production Example 2 were mixed at a ratio of 50:50, and the extrusion temperature was changed to 190 ° C. 40μ in thickness
m, a cylindrical film having a folded diameter of 300 mm was obtained. This film was cut into a length of 300 mm, and one end was heat-sealed to obtain a bag-shaped container.
【００２１】実施例３ 製造例１で得られたポリＬ−乳酸と、製造例２で得られ
たポリＤＬ−乳酸を２０：８０で混合し、押出し温度を
１８０℃にした以外は実施例１と同様にして厚さ４０μ
ｍ、折径３００ｍｍの円筒状フィルムを得た。このフィ
ルムを長さ３００ｍｍにカットし、一端をヒートシール
して袋状の容器を得た。Example 3 Example 1 was repeated except that the poly-L-lactic acid obtained in Production Example 1 and the poly-DL-lactic acid obtained in Production Example 2 were mixed at a ratio of 20:80 and the extrusion temperature was adjusted to 180 ° C. 40μ in thickness
m, a cylindrical film having a folded diameter of 300 mm was obtained. This film was cut into a length of 300 mm, and one end was heat-sealed to obtain a bag-shaped container.
【００２２】比較例１ 製造例１で得られたポリＬ−乳酸と、製造例２で得られ
たポリＤＬ−乳酸の代わりにポリヒドロキシブチレート
とポリヒドロキシバレレート共重合体を用い、押出し温
度を１５０℃にした以外は実施例１と同様にして厚さ４
０μｍ、折径３００ｍｍの円筒状フィルムを得た。この
フィルムを長さ３００ｍｍにカットし、一端をヒートシ
ールして袋状の容器を得た。Comparative Example 1 Polyhydroxybutyrate and polyhydroxyvalerate copolymer were used in place of the poly L-lactic acid obtained in Production Example 1 and the poly DL-lactic acid obtained in Production Example 2, and the extrusion temperature was changed. Was changed to 150 ° C., and
A cylindrical film having a diameter of 0 μm and a folded diameter of 300 mm was obtained. This film was cut into a length of 300 mm, and one end was heat-sealed to obtain a bag-shaped container.
【００２３】比較例２ 製造例１で得られたポリＬ−乳酸と、製造例２で得られ
たポリＤＬ−乳酸の代わりにポリエチレンを用い、押出
し温度を２００℃にした以外は実施例１と同様にして厚
さ４０μｍ、折径３００ｍｍの円筒状フィルムを得た。
このフィルムを長さ３００ｍｍにカットし、一端をヒー
トシールして袋状の容器を得た。Comparative Example 2 The procedure of Example 1 was repeated except that polyethylene was used instead of the poly-L-lactic acid obtained in Production Example 1 and the poly-DL-lactic acid obtained in Production Example 2 and the extrusion temperature was 200 ° C. Similarly, a cylindrical film having a thickness of 40 μm and a folded diameter of 300 mm was obtained.
This film was cut into a length of 300 mm, and one end was heat-sealed to obtain a bag-shaped container.
【００２４】実施例及び比較例で得た各々の袋状容器を
用い、引っ張り破断強度の測定と下記の実用試験を行っ
た。結果を表−１（表１）に示す。Using each of the bag-shaped containers obtained in Examples and Comparative Examples, the measurement of tensile breaking strength and the following practical tests were performed. The results are shown in Table 1 (Table 1).
【００２５】実施例４ 製造例２で得たポリＤＬ−乳酸を用い、押出し温度を１
８０℃にした以外は、実施例１と同様にして厚さ４０μ
ｍ、折径３００ｍｍの円筒状フィルムを得た。このフィ
ルムを長さ３００ｍｍにカットし、一端をヒートシール
して袋状の容器を得た。Example 4 The poly-DL-lactic acid obtained in Production Example 2 was used at an extrusion temperature of 1
Except that the temperature was 80 ° C, the thickness was 40 μm in the same manner as in Example 1.
m, a cylindrical film having a folded diameter of 300 mm was obtained. This film was cut into a length of 300 mm, and one end was heat-sealed to obtain a bag-shaped container.
【００２６】実施例５ 製造例３で得たＬ−ラクタイドとグリコライドのコポリ
マーを用い、押出し温度を１５０℃にした以外は、実施
例１と同様にして厚さ４０μｍ、折径３００ｍｍの円筒
状フィルムを得た。このフィルムを長さ３００ｍｍにカ
ットし、一端をヒートシールして袋状の容器を得た。Example 5 A cylinder having a thickness of 40 μm and a folded diameter of 300 mm was prepared in the same manner as in Example 1 except that the copolymer of L-lactide and glycolide obtained in Production Example 3 was used and the extrusion temperature was changed to 150 ° C. A film was obtained. This film was cut into a length of 300 mm, and one end was heat-sealed to obtain a bag-shaped container.
【００２７】実施例６ 製造例４で得たＬ−ラクタイドとε−カプロラクトンの
コポリマーを用い、押出し温度を１５０℃にした以外
は、実施例１と同様にして厚さ４０μｍ、折径３００ｍ
ｍの円筒状フィルムを得た。このフィルムを長さ３００
ｍｍにカットし、一端をヒートシールして袋状の容器を
得た。Example 6 The procedure of Example 1 was repeated, except that the copolymer of L-lactide and ε-caprolactone obtained in Production Example 4 was used and the extrusion temperature was 150 ° C., and the thickness was 40 μm and the folded diameter was 300 m.
m was obtained. This film has a length of 300
mm, and one end was heat-sealed to obtain a bag-shaped container.
【００２８】実施例４〜６で得た各々の袋状容器を用
い、引っ張り破断強度の測定と下記の実用試験を行っ
た。結果を表−２（表２）に示す。Using each of the bag-shaped containers obtained in Examples 4 to 6, the measurement of tensile breaking strength and the following practical test were performed. The results are shown in Table 2 (Table 2).
【００２９】実用試験の方法 実施例及び比較例で得られた袋状容器に、坪量６５ｇ／
ｍ2、２００ｍｍ×２００ｍｍの上質紙２０枚を入れ入
口をヒートシールする。これを温度６０℃の１Ｎ水酸化
ナトリウム水溶液中に浸漬し１時間攪拌する。Method of Practical Test The bag-shaped containers obtained in Examples and Comparative Examples were weighed to a basis weight of 65 g /
20 sheets of high quality paper having a size of 200 mm × 200 mm 2 are put in, and the entrance is heat-sealed. This is immersed in a 1N aqueous solution of sodium hydroxide at a temperature of 60 ° C. and stirred for 1 hour.
【００３０】[0030]
【表１】 [Table 1]
【００３１】[0031]
【表２】 [Table 2]
【００３２】[0032]
【発明の効果】本発明による乳酸系ポリマーを主体とす
る熱可塑性樹脂組成物からなる回収古紙収納容器は、内
容物である古紙と分離する必要がなく、そのまま一緒に
パルプ回収工程に共することができ、古紙回収作業の手
間を大幅に簡素化できるものである。According to the present invention, the recovered waste paper storage container made of the thermoplastic resin composition mainly composed of a lactic acid-based polymer does not need to be separated from the waste paper as the content, and can be used together with the pulp recovery process as it is. This greatly simplifies the work of collecting used paper.
フロントページの続き (56)参考文献 特開 平４−304244（ＪＰ，Ａ) 特開 平２−222421（ＪＰ，Ａ) 特開 平１−198552（ＪＰ，Ａ) 特開 平４−168150（ＪＰ，Ａ) 実開 平１−154110（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B65F 1/00 C08G 63/06 Continuation of front page (56) References JP-A-4-304244 (JP, A) JP-A-2-222421 (JP, A) JP-A-1-198552 (JP, A) JP-A-4-168150 (JP) , A) Hikaru Hei 1-154110 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) B65F 1/00 C08G 63/06
Claims (3)
ルボン酸のコポリマーを主成分とする熱可塑性ポリマー
組成物からなる回収古紙収納容器。1. A recovered waste paper storage container comprising a thermoplastic polymer composition containing polylactic acid or a copolymer of lactic acid and another hydroxycarboxylic acid as a main component.
の混合物であることを特徴とする請求項１記載の回収古
紙収納容器。2. The container according to claim 1, wherein the lactic acid is L-lactic acid, D-lactic acid or a mixture thereof.
または６−ヒドロキシカプロン酸であることを特徴とす
る請求項１記載の回収古紙収納容器。3. The method of claim 1, wherein the hydroxycarboxylic acid is glycolic acid,
2. The container according to claim 1, wherein the container is 6-hydroxycaproic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17978092A JP3148367B2 (en) | 1992-07-07 | 1992-07-07 | Recovered paper storage container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17978092A JP3148367B2 (en) | 1992-07-07 | 1992-07-07 | Recovered paper storage container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0624501A JPH0624501A (en) | 1994-02-01 |
| JP3148367B2 true JP3148367B2 (en) | 2001-03-19 |
Family
ID=16071765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17978092A Expired - Fee Related JP3148367B2 (en) | 1992-07-07 | 1992-07-07 | Recovered paper storage container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3148367B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5763513A (en) * | 1994-05-19 | 1998-06-09 | Mitsui Toatsu Chemicals, Inc. | L-lactic acid polymer composition, molded product and film |
| ITTO20010061A1 (en) * | 2001-01-25 | 2002-07-25 | Novamont Spa | BINARY MIXTURES OF BIODEGRADABLE ALIPHATIC POLYESTERS AND PRODUCTS OBTAINED FROM THESE. |
-
1992
- 1992-07-07 JP JP17978092A patent/JP3148367B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0624501A (en) | 1994-02-01 |
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