JP2002105887A - Pulp molded article with water resistance and barrier property and method for producing the same - Google Patents
Pulp molded article with water resistance and barrier property and method for producing the sameInfo
- Publication number
- JP2002105887A JP2002105887A JP2000302074A JP2000302074A JP2002105887A JP 2002105887 A JP2002105887 A JP 2002105887A JP 2000302074 A JP2000302074 A JP 2000302074A JP 2000302074 A JP2000302074 A JP 2000302074A JP 2002105887 A JP2002105887 A JP 2002105887A
- Authority
- JP
- Japan
- Prior art keywords
- pulp molded
- water resistance
- molded article
- biodegradable
- producing
- 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
-
- 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
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Landscapes
- Laminated Bodies (AREA)
- Biological Depolymerization Polymers (AREA)
- Paper (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、耐水性とバリア性
に優れたパルプ成形体（紙容器など）に関するものであ
り、さらに詳細には、生分解性を損なわずに耐水性とガ
スバリア性を付与したパルプ成形体およびその製造方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulp molded article (such as a paper container) having excellent water resistance and barrier properties, and more particularly, to water resistance and gas barrier properties without impairing biodegradability. The present invention relates to a pulp molded article provided and a method for producing the same.
【０００２】[0002]
【従来の技術】従来、例えば即席麺用の紙製カップやコ
ーヒー用の紙製カップあるいは弁当用の紙製トレー（容
器）などは、プラスチック製の容器に代わり、低コスト
で軽く廃棄物の焼却処理がし易い容器として広く使用さ
れている。2. Description of the Related Art Conventionally, for example, paper cups for instant noodles, paper cups for coffee or paper trays (containers) for lunch boxes are inexpensively and lightly incinerated at low cost instead of plastic containers. It is widely used as a container that can be easily processed.
【０００３】上記紙製カップは、耐水性や用途によって
は水蒸気バリア性が要求されるので、カップ成形前に紙
基材内面にポリエチレンフィルムなどが積層されている
カップ原紙を成形加工して紙製カップとし、また上記紙
製トレーは、例えば紙を水に溶解させてパルプスラリー
（液状）にし、それを用途に合わせたさまざまな形状の
金網を取り付けた金型あるいは水透過性のセラミック型
の上に流し込みバキューム抄造（成形）して得られるも
ので、さらに寸法精度の必要な製品にはアフタープレス
が施されて得られる。また上記紙製トレーの場合も耐水
性や場合によっては水蒸気バリア性も要求されるので、
この紙製トレー容器本体の内面に、結晶ポリエステルフ
ィルム（Ｃ−ＰＥＴ）やポリプロピレンフィルム、ポリ
エチレンフィルム等を圧空あるいは真空成形にて積層さ
せて得られるものである。[0003] The above-mentioned paper cups are required to have a water vapor barrier property depending on the water resistance and the intended use. Therefore, before forming the cup, the cup base paper in which a polyethylene film or the like is laminated on the inner surface of the paper base material is formed and processed. The paper tray is made of a pulp slurry (liquid) by dissolving paper in water, and a paper pulp slurry (liquid) is used. It is obtained by vacuum papermaking (molding), and after press is applied to products requiring dimensional accuracy. Also, in the case of the above-mentioned paper tray, water resistance and depending on the case, water vapor barrier properties are also required,
It is obtained by laminating a crystalline polyester film (C-PET), a polypropylene film, a polyethylene film, or the like on the inner surface of the main body of the paper tray container by air or vacuum forming.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記紙
製カップや紙製トレーの従来技術においては、まず容器
内面にポリエチレンやポリエステル等フィルムが積層さ
れているので、紙自体が持っている生分解性を損ない、
廃棄に際し環境負荷の低減に寄与できず、かつ特に紙製
トレー等への圧空成形等では容器内面の細かい部分まで
精巧に積層されなかったり、容器内面のコーナーでは薄
肉となったりして歩留りが低下し、また圧空や真空成形
に使用するフィルムの無駄（面取りの関係から使用それ
ない部分）が多くできて、材料コストが嵩むという問題
があった。However, in the prior art of paper cups and paper trays, since a film such as polyethylene or polyester is first laminated on the inner surface of the container, the biodegradability of the paper itself is high. Impair,
It does not contribute to the reduction of environmental load when discarded, and especially in the case of air pressure molding on paper trays, etc., the fine part of the inner surface of the container is not precisely laminated, and the corners on the inner surface of the container become thinner, reducing the yield. In addition, there is a problem that a large amount of waste (a portion not used due to chamfering) of the film used for the compressed air or vacuum forming is increased, and the material cost increases.
【０００５】本発明は、かかる従来技術の問題点を解決
するものであり、その課題とするところは、紙自体の生
分解性を損なわず、すなわち廃棄に係わる環境に配慮さ
れた、かつ材料コストの嵩まない耐水性とバリア性に優
れたパルプ成形体およびその製造方法を提供することに
ある。The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention not to impair the biodegradability of paper itself, that is, to consider the environment related to disposal and the material cost. It is an object of the present invention to provide a pulp molded article which is excellent in water resistance and barrier properties without bulk and a method for producing the same.
【０００６】[0006]
【課題を解決するための手段】本発明に於いて上記課題
を達成するために、まず請求項１の発明では、内面およ
び／または外面に、ポリエステル系生分解性プラスチッ
クもしくはシェラックでなる生分解性塗工膜が形成され
ていることを特徴とする耐水性とバリア性に優れたパル
プ成形体としたものである。In order to achieve the above object, the present invention provides a method for producing a biodegradable resin comprising a polyester-based biodegradable plastic or shellac on an inner surface and / or an outer surface. This is a pulp molded article excellent in water resistance and barrier properties, characterized by having a coating film formed thereon.
【０００７】上記請求項１の発明によれば、パルプ成形
体の内面および／または外面に、生分解性のあるポリエ
ステル系生分解性プラスチックもしくはシェラック（カ
イガラ虫が分泌する樹脂状物質を精製したもの）でなる
生分解性塗工膜を形成したので、生分解性を損なわずに
耐水性とバリア性に優れたパルプ成形体とすることがで
きる。According to the first aspect of the present invention, a biodegradable polyester-based biodegradable plastic or shellac (resin obtained by purifying a resinous substance secreted by a giant insect) is provided on the inner surface and / or outer surface of the pulp molded product. Since the biodegradable coating film of (1) is formed, a pulp molded article having excellent water resistance and barrier properties can be obtained without impairing the biodegradability.
【０００８】また、請求項２の発明では、前記生分解性
塗工膜の形成は、静電粉体塗工方法により塗着され、さ
らに加熱処理されてなることを特徴とする耐水性とバリ
ア性に優れたパルプ成形体の製造方法としたものであ
る。Further, in the invention according to claim 2, the biodegradable coating film is formed by applying an electrostatic powder coating method and further performing a heat treatment. This is a method for producing a pulp molded article having excellent properties.
【０００９】上記請求項２の発明によれば、粉末化が容
易なポリエステル系生分解性プラスチックもしくはシェ
ラックの粉末を静電粉体塗工方法でパルプ成形体の内面
および／または外面に塗着し、熱処理することによっ
て、パルプ成形体本体の細かい部分まで均一な厚さに塗
着することができるので、製品の歩留りが向上し、かつ
塗着されずに未使用の粉末は回収されて再度使用するこ
とができるので、材料コストの嵩まない耐水性とバリア
性に優れたパルプ成形体の製造方法を提供できる。According to the second aspect of the present invention, a powder of a polyester-based biodegradable plastic or shellac, which is easily powdered, is applied to the inner surface and / or the outer surface of the pulp molded body by an electrostatic powder coating method. By heat treatment, it is possible to apply even thickness to the fine part of the pulp molded body, so that the product yield is improved, and unused powder without being applied is collected and reused Therefore, it is possible to provide a method for producing a pulp molded article excellent in water resistance and barrier properties without increasing the material cost.
【００１０】[0010]
【発明の実施の形態】以下本発明の実施の形態を図面を
用いながら説明する。本発明は、図１の側断面積層図に
示すように、耐水性とバリア性に優れたパルプ成形体
（１）（例えば紙製トレーなど）に関するものであり、
さらに詳細には、紙製容器本体（１０）の内面に生分解
性塗工膜（２０）が形成された耐水性とガスバリア性を
付与したパルプ成形体（１）とその製造方法に関するも
のである。Embodiments of the present invention will be described below with reference to the drawings. The present invention relates to a pulp molded article (1) (for example, a paper tray or the like) having excellent water resistance and barrier properties, as shown in the side sectional view of FIG.
More specifically, the present invention relates to a pulp molded article (1) having a biodegradable coating film (20) formed on the inner surface of a paper container body (10) and imparting water resistance and gas barrier properties, and a method for producing the pulp molded article. .
【００１１】そこで本発明では、まず図１に示すよう
に、例えば紙製容器本体（１０）の内面に、生分解性の
機能を有する熱可塑性樹脂であるポリエステル系生分解
性プラスチックもしくは天然樹脂でラックカイガラ虫が
分泌する樹脂状物質で、熱硬化性を有するシェラックか
らなる生分解性塗工膜（２０）が形成されているパルプ
成形体（１）とするものである。In the present invention, first, as shown in FIG. 1, for example, a polyester biodegradable plastic or a natural resin, which is a thermoplastic resin having a biodegradable function, is formed on the inner surface of a paper container body (10). A pulp molded article (1) formed by a biodegradable coating film (20) made of shellac having thermosetting properties, which is a resinous substance secreted by Lacquerbug insects.
【００１２】上記生分解性塗工膜（２０）は、紙製容器
本体（１０）の外面に、あるいは両面に施してもよい
が、内容物に対する耐水性を考慮すると内面に施すのが
一般的であり、両面に施せば外部からの耐水性も水蒸気
バリア性もより向上するが、製造コストが嵩むので、両
面に施すことは特殊ケースを除けばそれほど多くはな
い。The biodegradable coating film (20) may be applied to the outer surface or both surfaces of the paper container body (10), but is generally applied to the inner surface in consideration of the water resistance to the contents. When applied to both sides, the water resistance from the outside and the water vapor barrier property are further improved. However, since the production cost is increased, the application to both sides is not so large except for special cases.
【００１３】また本発明では、図１に示す生分解性塗工
膜（２０）の形成は、静電粉体塗工方法により塗着さ
れ、さらに加熱処理されてなる耐水性とバリア性に優れ
たパルプ成形体（１）の製造方法とするものである。Further, in the present invention, the biodegradable coating film (20) shown in FIG. 1 is formed by applying an electrostatic powder coating method and then heat-treating to provide excellent water resistance and barrier properties. And a method for producing a pulp molding (1).
【００１４】上記静電粉体塗工方法による生分解性塗工
膜（２０）の塗着は、図２の側断面概略図に示すよう
に、例えば特殊加工されたチューブ（図示せず）内で摩
擦帯電されたポリエステル系生分解性プラスチックある
いはシェラックの生分解性樹脂粉末（２２）を、スプレ
ーガン（５）から吐出させたあとの空気の流れに沿って
その生分解性樹脂粉末（２２）が進み紙製容器本体（１
０）内面に付着する所謂トリボチャージプロセスという
方法で成される。さらにこの付着した生分解性樹脂粉末
（２２）を、熱可塑性合成樹脂であるポリエステル系生
分解性プラスチックの場合は、例えばオーブン中で６０
℃〜２００℃程度と生分解性プラスチックの種類によっ
て異なる熱処理によって、生分解性塗工膜（２０）を融
着形成し、あるいは熱硬化性天然樹脂であるシェラック
の場合は、例えばオーブン中で１３０℃程度で熱処理し
て硬化させ生分解性塗工膜（２０）を形成する製造方法
である。The application of the biodegradable coating film (20) by the above-mentioned electrostatic powder coating method is performed, for example, in a specially processed tube (not shown) as shown in a schematic side sectional view of FIG. The biodegradable resin powder (22) of the polyester-based biodegradable plastic or shellac triboelectrically charged by the spray gun (5) is discharged along with the flow of air after being discharged from the spray gun (5). The container body made of paper (1
0) It is performed by a so-called tribocharge process that adheres to the inner surface. Further, in the case of a polyester-based biodegradable plastic which is a thermoplastic synthetic resin, the attached biodegradable resin powder (22) is, for example, 60% in an oven.
The biodegradable coating film (20) is fusion-formed by a heat treatment that varies depending on the type of the biodegradable plastic, such as about 200 ° C. to 200 ° C., or in the case of shellac which is a thermosetting natural resin, for example, 130 This is a manufacturing method in which a biodegradable coating film (20) is formed by heat treatment and curing at about ° C.
【００１５】前記静電粉体塗工方法として、上記トリボ
（摩擦という意味）チャージプロセスの他、一般的なコ
ロナチャージシステムと言われる方法でもよい。このコ
ロナチャージシステムは、高圧発生装置より−３０〜１
００ｋＶの高電圧が、スプレーガン先端のコロナピンに
印加され、このコロナピンからコロナ放電が起こり、被
塗布物である紙製容器本体との間に電界を作り、この電
界内を通過した生分解性樹脂粉末が帯電されて紙製容器
本体に付着する方法である。As the electrostatic powder coating method, in addition to the tribo (meaning of friction) charging process, a method called a general corona charging system may be used. This corona charge system is -30 to -1 from the high pressure generator.
A high voltage of 00 kV is applied to the corona pin at the tip of the spray gun, and a corona discharge occurs from the corona pin, creating an electric field between the object and the paper container body, and the biodegradable resin passing through the electric field. In this method, the powder is charged and adheres to the paper container body.
【００１６】また前記加熱処理方法として、上記のオー
ブン加熱の他、雄型で加圧加熱する方法でも赤外線加
熱、ホットエアー照射でもよい。As the heat treatment method, in addition to the above-described oven heating, a male pressurizing method, infrared heating, or hot air irradiation may be used.
【００１７】以下に本発明の耐水性とバリア性に優れた
パルプ成形体（１）の材料等を説明する。本発明の耐水
性とバリア性に優れたパルプ成形体（１）を構成する紙
製容器本体（１０）としては、例えば各種紙を水で溶解
してパルプスリラー（あるいは製紙工程の漂白パルプ所
謂バージンパルプを水に溶解したものでもよい）とし、
このスリラーを表面に金網を取り付けた用途に応じた形
状（例えば弁当箱のような開口部が広いトレー状で底部
におかずを載せる窪みがあるものなど）の金型あるいは
水透過性のセラミック型に所要量流し込み、水を切り、
さらに残っている水分を加熱により蒸発させ、さらに寸
法精度を要求されるものにはこの雌型の金型と同形の雄
型で加熱加圧して紙製容器本体（１０）が得られる。内
容物が食品以外のものであれば、各種紙やバージンパル
プに代わり、古紙を利用することによって環境保全に更
なる寄与する紙製容器本体（１０）とすることもでき
る。The material of the pulp molded article (1) having excellent water resistance and barrier properties of the present invention will be described below. The paper container body (10) constituting the pulp molded article (1) having excellent water resistance and barrier properties of the present invention is, for example, a pulp slurry (or bleached pulp in a paper making process, a so-called virgin) obtained by dissolving various papers with water. Pulp may be dissolved in water)
This chiller is shaped into a mold (for example, a tray with a wide opening such as a lunch box with a hollow for placing side dishes) or a water-permeable ceramic mold according to the application with a wire mesh attached to the surface. Pour the required amount, drain the water,
The remaining moisture is further evaporated by heating, and for those requiring higher dimensional accuracy, a paper container main body (10) is obtained by heating and pressing with a male mold having the same shape as the female mold. If the contents are other than food, the paper container body (10) can further contribute to environmental conservation by using waste paper instead of various papers or virgin pulp.
【００１８】また、例えばカップ原紙を用いて、紙カッ
プ成形機にて成形し、グルー（接着剤）止めして得られ
る飲料や即席麺用等の紙製容器本体（１０）とすること
もできる。Further, for example, a paper container body (10) for beverages or instant noodles obtained by molding with a paper cup molding machine using a cup base paper and fixing it with a glue (adhesive) can be used.
【００１９】また、本発明の耐水性とバリア性に優れた
パルプ成形体（１）を構成する生分解性塗工膜（２０）
の材料としては、熱可塑性樹脂であるポリエステル系生
分解性プラスチックがあり、例えば脂肪族ポリエステル
が用いられ、この脂肪族ポリエステルとしては、乳酸を
主成分にした樹脂のほか、ヒドロキシアルカノエートユ
ニットを有する微生物より産出される脂肪族ポリエステ
ルおよび化学合成による脂肪族ポリエステルが挙げられ
る。Further, the biodegradable coating film (20) constituting the pulp molded product (1) having excellent water resistance and barrier properties of the present invention.
Examples of the material include a polyester-based biodegradable plastic that is a thermoplastic resin.For example, an aliphatic polyester is used.As the aliphatic polyester, in addition to a resin containing lactic acid as a main component, it has a hydroxyalkanoate unit. Aliphatic polyesters produced by microorganisms and chemically synthesized aliphatic polyesters are exemplified.
【００２０】上記乳酸を主体にした樹脂としては、数平
均分子量が１０，０００〜１００，０００である乳酸が
好ましく、乳酸とオキシカルボン酸のコポリマーでもよ
い。また、乳酸はＤ−乳酸、Ｌ−乳酸またはそれらの混
合物の何れであっても良い。また、前記オキシカルボン
酸は、グリコール酸または６−ヒドロキシカプロン酸を
用いることも可能である。The lactic acid-based resin is preferably lactic acid having a number average molecular weight of 10,000 to 100,000, and may be a copolymer of lactic acid and oxycarboxylic acid. The lactic acid may be D-lactic acid, L-lactic acid or a mixture thereof. Further, as the oxycarboxylic acid, glycolic acid or 6-hydroxycaproic acid can be used.
【００２１】また、上記ヒドロキシアルカノエートユニ
ットを有する微生物より産出される脂肪族ポリエステル
としては、３−ヒドロキシバリレート、３−ヒドロキシ
ブチレート、３−ヒドロキシカプロエート、３−ヒドロ
キシヘプタノエートおよびそれらの側鎖に種々の官能基
を有するＰ（３ＨＡ）共重合体の一つまたは二つ以上の
混合物を用いることができる。また、化学合成による脂
肪族ポリエステルとしては、数平均分子量として１０，
０００〜１００，０００の下記（化１）で示される樹
脂、あるいは数平均分子量として２５，０００〜７０，
０００の下記（化２）で示される樹脂、またはそれらの
樹脂の混合物でもかまわない。The aliphatic polyester produced by the microorganism having the above hydroxyalkanoate unit includes 3-hydroxyvalerate, 3-hydroxybutyrate, 3-hydroxycaproate, 3-hydroxyheptanoate and the like. One or a mixture of two or more P (3HA) copolymers having various functional groups in the side chain can be used. As the aliphatic polyester obtained by chemical synthesis, the number average molecular weight is 10,10.
000 to 100,000 of the following resin represented by the following (Chemical formula 1), or 25,000 to 70,
000 or a mixture of these resins.
【００２２】[0022]
【化１】 （式中ｍは重合度、Ｍは０又は１以上の数、Ｒ1及びＲ2
は炭素数２〜１０のアルキレン基、シクロ管基、または
シクロアルキレン基であり、Ｒ3はジまたはポリイソシ
アナート残基を表す）Embedded image (Wherein m is the degree of polymerization, M is a number of 0 or 1 or more, R 1 and R 2
Is an alkylene group having 2 to 10 carbon atoms, a cyclotube group, or a cycloalkylene group, and R 3 represents a di- or polyisocyanate residue.
【００２３】[0023]
【化２】 （式中ｍは重合度。Ｒ1及びＲ2は炭素数２〜１０のアル
キレン基、シクロ管基、またはシクロアルキレン基を表
す。ただし分岐もあり得る）Embedded image (In the formula, m is the degree of polymerization. R 1 and R 2 represent an alkylene group having 2 to 10 carbon atoms, a cyclotube group, or a cycloalkylene group, but may be branched.)
【００２４】上記脂肪族ポリエステルの他に、脂肪族芳
香族ポリエステルが用いられ、ポリブチレンアジペート
／テレフタレート共重合体、変性ポリエチレンテレフタ
レートなどが挙げられる。In addition to the above aliphatic polyesters, aliphatic aromatic polyesters are used, and examples thereof include polybutylene adipate / terephthalate copolymer and modified polyethylene terephthalate.
【００２５】また、生分解性塗工膜（２０）の材料とし
て、熱硬化性で天然樹脂であるシェラックが挙げられ、
これは体長約０．６〜０．７ｍｍのラックカイガラ虫が
分泌する樹脂状物質を熱溶融法、ソーダ法、溶剤抽出法
等で精製して得られる熱硬化性天然樹脂である。この樹
脂は、生分解性を有するとともに、耐水性、耐油性にも
優れ、かつ毒性がないので食品や医薬用の容器には好適
な樹脂である。Further, as a material of the biodegradable coating film (20), shellac which is a thermosetting and natural resin may be mentioned.
This is a thermosetting natural resin obtained by purifying a resinous substance secreted by a giant larvae having a body length of about 0.6 to 0.7 mm by a hot melting method, a soda method, a solvent extraction method or the like. Since this resin has biodegradability, is excellent in water resistance and oil resistance, and has no toxicity, it is a suitable resin for food and medical containers.
【００２６】上記ポリエステル系生分解性プラスチック
およびシェラックを微粉末化して、静電粉体塗工法で生
分解性塗工膜（２０）として塗着されるが、この生分解
性樹脂粉末（２２）の粒径は、２〜３μｍ程度が帯電適
性や成膜適性等から好適である。The polyester-based biodegradable plastic and shellac are pulverized and applied as a biodegradable coating film (20) by an electrostatic powder coating method. Is preferably about 2 to 3 μm from the viewpoint of suitability for charging, suitability for film formation, and the like.
【００２７】[0027]
【発明の効果】本発明は以上の構成であるから、下記に
示す如き効果がある。即ち、パルプ成形体の内面および
／または外面に、生分解性のあるポリエステル系生分解
性プラスチックもしくはシェラック（カイガラ虫が分泌
する樹脂状物質を精製したもの）でなる生分解性塗工膜
を形成したので、生分解性を損なわずにすなわち環境に
配慮された耐水性とバリア性に優れたパルプ成形体とす
ることができる。As described above, the present invention has the following effects. That is, a biodegradable coating film made of a biodegradable polyester-based biodegradable plastic or shellac (purified resinous substance secreted by a giant insect) is formed on the inner surface and / or outer surface of the pulp molded body. Therefore, it is possible to obtain a pulp molded body having excellent water resistance and excellent barrier properties in consideration of the environment without impairing the biodegradability.
【００２８】また、前記生分解性塗工膜の形成を、静電
粉体塗工方法によりパルプ成形体の内面および／または
外面に塗着し、さらに加熱処理することによって、パル
プ成形体本体の細かい部分まで均一な厚さに塗着するこ
とができるので、製品の歩留りが向上し、かつ未使用の
粉末は回収されて再度使用することができるので、材料
コストの嵩まない耐水性とバリア性に優れたパルプ成形
体の製造方法を提供できる。Further, the formation of the biodegradable coating film is applied to the inner surface and / or outer surface of the pulp molded body by an electrostatic powder coating method, and further subjected to a heat treatment to thereby form the pulp molded body. Since it can be applied to a uniform thickness even to the fine parts, the product yield is improved, and the unused powder can be collected and reused, so that the water resistance and barrier without increasing the material cost A method for producing a pulp molded article having excellent properties can be provided.
【００２９】従って本発明は、廃棄物に係わる環境問題
に配慮された即席麺用やコーヒー等飲料カップや弁当箱
などの耐水性とバリア性に優れたパルプ成形体として、
優れた実用上の効果を発揮する。Accordingly, the present invention provides a pulp molded article excellent in water resistance and barrier properties such as instant noodles, coffee cups and lunch boxes, etc., in consideration of environmental issues related to wastes.
It has excellent practical effects.
【図１】本発明の耐水性とバリア性に優れたパルプ成形
体の一実施の形態を側断面で表した説明図である。FIG. 1 is an explanatory diagram showing an embodiment of a pulp molded article excellent in water resistance and barrier properties of the present invention in a side cross section.
【図２】本発明の耐水性とバリア性に優れたパルプ成形
体の製造方法の一実施の形態を側断面で表した説明図で
ある。FIG. 2 is an explanatory view showing an embodiment of a method for producing a pulp molded article excellent in water resistance and barrier properties of the present invention in a side cross section.
１‥‥耐水性とバリア性に優れたパルプ成形体 ５‥‥スプレーガン １０‥‥紙製容器本体 ２０‥‥生分解性塗工膜 ２２‥‥生分解性樹脂粉末 1) Pulp molded body excellent in water resistance and barrier properties 5) Spray gun 10) Paper container body 20) Biodegradable coating film 22) Biodegradable resin powder
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ６５Ｄ 25/34 ＢＳＧ Ｄ２１Ｈ 19/28 Ｄ２１Ｈ 19/28 Ｄ２１Ｊ 3/10 // Ｄ２１Ｊ 3/10 Ｂ６５Ｄ 1/00 ＢＳＬＢ Ｆターム(参考） 2B260 AA03 AA05 AA20 BA04 BA15 CC01 CD15 CD30 DA01 DA07 DA12 DA17 DA18 DD02 EA11 EB02 EB11 EB19 EB24 3E033 AA08 AA10 BA10 EA10 FA10 3E062 AA03 AA10 AC05 JA01 JA07 JA08 JB23 JC02 JD01 JD02 4F100 AJ01B AJ01C AJ02A AK41B AK41C BA02 BA03 BA06 BA10B BA10C DG10A EH462 GB16 GB23 JB07 JC00B JC00C JD01 4L055 AG51 AG82 AH23 AJ02 BF09 FA19 FA20 GA05 GA50 Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat II (Reference) B65D 25/34 BSG D21H 19/28 D21H 19/28 D21J 3/10 // D21J 3/10 B65D 1/00 BSLB F-term (Reference) 2B260 AA03 AA05 AA20 BA04 BA15 CC01 CD15 CD30 DA01 DA07 DA12 DA17 DA18 DD02 EA11 EB02 EB11 EB19 EB24 3E033 AA08 AA10 BA10 EA10 FA10 3E062 AA03 AA10 AC05 JA01 JA07 JA08 JB23 JC02 JD01A01A02 BA10C DG10A EH462 GB16 GB23 JB07 JC00B JC00C JD01 4L055 AG51 AG82 AH23 AJ02 BF09 FA19 FA20 GA05 GA50
Claims (2)
系生分解性プラスチックもしくはシェラックでなる生分
解性塗工膜が形成されていることを特徴とする耐水性と
バリア性に優れたパルプ成形体。1. A pulp molded article excellent in water resistance and barrier properties, characterized in that a biodegradable coating film made of a polyester-based biodegradable plastic or shellac is formed on an inner surface and / or an outer surface.
工方法により塗着され、さらに加熱処理されてなること
を特徴とする耐水性とバリア性に優れたパルプ成形体の
製造方法。2. A pulp molded article having excellent water resistance and barrier properties, wherein the biodegradable coating film is formed by applying an electrostatic powder coating method and then subjecting the coated film to heat treatment. Manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000302074A JP2002105887A (en) | 2000-10-02 | 2000-10-02 | Pulp molded article with water resistance and barrier property and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000302074A JP2002105887A (en) | 2000-10-02 | 2000-10-02 | Pulp molded article with water resistance and barrier property and method for producing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002105887A true JP2002105887A (en) | 2002-04-10 |
Family
ID=18783499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000302074A Pending JP2002105887A (en) | 2000-10-02 | 2000-10-02 | Pulp molded article with water resistance and barrier property and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002105887A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003099558A1 (en) * | 2002-05-29 | 2003-12-04 | Kureha Chemical Industry Company, Limited | Container of biodegradable heat-resistant hard resin molding |
| JP2006122317A (en) * | 2004-10-28 | 2006-05-18 | Toyo Kasei Kk | Ornamental sheet of game machine |
| JP2009287159A (en) * | 2008-04-28 | 2009-12-10 | National Institute Of Agrobiological Sciences | Acid- and water-resistant paper sheet and method of producing the same |
| WO2010022267A1 (en) * | 2008-08-21 | 2010-02-25 | Sacred Green, Inc. | Compostable container for storing fluids |
| WO2014018370A1 (en) * | 2012-07-25 | 2014-01-30 | Greater Good, Inc. | Fluid container |
| US9302832B2 (en) | 2013-05-29 | 2016-04-05 | Greater Good, Inc. | Compostable container with elongate connector |
-
2000
- 2000-10-02 JP JP2000302074A patent/JP2002105887A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003099558A1 (en) * | 2002-05-29 | 2003-12-04 | Kureha Chemical Industry Company, Limited | Container of biodegradable heat-resistant hard resin molding |
| JP2006122317A (en) * | 2004-10-28 | 2006-05-18 | Toyo Kasei Kk | Ornamental sheet of game machine |
| JP2009287159A (en) * | 2008-04-28 | 2009-12-10 | National Institute Of Agrobiological Sciences | Acid- and water-resistant paper sheet and method of producing the same |
| WO2010022267A1 (en) * | 2008-08-21 | 2010-02-25 | Sacred Green, Inc. | Compostable container for storing fluids |
| US8245848B2 (en) | 2008-08-21 | 2012-08-21 | Sacred Green, Inc. | Compostable container for storing fluids |
| US20120312814A1 (en) * | 2008-08-21 | 2012-12-13 | Cynthia Tolibas-Spurlock | Compostable container for storing fluids |
| US8852335B2 (en) | 2008-08-21 | 2014-10-07 | Sacred Greeen, Inc. | Compostable container for storing fluids |
| US20150114872A1 (en) * | 2008-08-21 | 2015-04-30 | Sacred Green, Inc. | Compostable container for storing fluids |
| WO2014018370A1 (en) * | 2012-07-25 | 2014-01-30 | Greater Good, Inc. | Fluid container |
| EP2877404A4 (en) * | 2012-07-25 | 2016-01-13 | Greater Good Inc | Fluid container |
| US9302832B2 (en) | 2013-05-29 | 2016-04-05 | Greater Good, Inc. | Compostable container with elongate connector |
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