JP2000344221A - Pulp molding container - Google Patents
Pulp molding containerInfo
- Publication number
- JP2000344221A JP2000344221A JP2000013556A JP2000013556A JP2000344221A JP 2000344221 A JP2000344221 A JP 2000344221A JP 2000013556 A JP2000013556 A JP 2000013556A JP 2000013556 A JP2000013556 A JP 2000013556A JP 2000344221 A JP2000344221 A JP 2000344221A
- Authority
- JP
- Japan
- Prior art keywords
- pulp
- thickness
- layer
- resin layer
- container
- 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
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
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
Landscapes
- Containers Having Bodies Formed In One Piece (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Paper (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、パルプモールド容
器に関する。TECHNICAL FIELD The present invention relates to a pulp mold container.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】パルプ
モールド成形体に樹脂層を形成してなる容器に関する技
術としては、例えば特開平１０−４６５００号公報に記
載のもの等が知られている。この公報には、脱水前又は
常温脱水後の状態にある所定含水率のパルプ層の内面に
高分子化合物の水溶液を噴霧した後、加熱プレス機等に
よって乾燥処理を施して浅底のモールドトレーを得る方
法が開示されている。2. Description of the Related Art As a technique relating to a container in which a resin layer is formed on a pulp molded article, for example, the technique described in Japanese Patent Application Laid-Open No. 10-46500 is known. This publication discloses that after spraying an aqueous solution of a polymer compound on the inner surface of a pulp layer having a predetermined moisture content in a state before dehydration or after dehydration at room temperature, a drying process is performed by a heating press or the like to form a shallow bottom mold tray. A method of obtaining is disclosed.
【０００３】しかし、上記公報に記載の方法では、噴霧
された高分子化合物の水溶液がパルプ層の内部に浸透し
てしまうことから、防水・防湿性が発現するのに十分な
厚みの層を形成するには多量の高分子化合物の水溶液が
必要となり、また乾燥時間も長くなることから製造費が
高くなってしまう。また、パルプ層の内部に浸透した高
分子化合物の水溶液が、パルプ繊維同士を結合するバイ
ンダとして作用するので、パルプ繊維の離解性が低下し
てしまい、再利用が容易でなくなる。[0003] However, in the method described in the above publication, the sprayed aqueous solution of the polymer compound penetrates into the pulp layer, so that a layer having a sufficient thickness to exhibit waterproofness and moistureproofness is formed. For this purpose, a large amount of an aqueous solution of a polymer compound is required, and the drying time becomes long, so that the production cost becomes high. In addition, since the aqueous solution of the polymer compound that has penetrated into the pulp layer acts as a binder for binding the pulp fibers, the disintegration of the pulp fibers is reduced, and the pulp fibers are not easily reused.
【０００４】従って、本発明は、従来よりも少量の原料
によって防水・防湿性を付与することができ且つ再利用
の容易なパルプモールド容器を提供することを目的とす
る。[0004] Accordingly, an object of the present invention is to provide a pulp mold container which can be provided with waterproof and moisture-proof properties with a smaller amount of raw materials than in the past and which can be easily reused.
【０００５】[0005]
【課題を解決するための手段】本発明は、パルプモール
ド成形体の内面及び／又は外面に合成樹脂から形成され
た厚み５〜３００μｍの樹脂層を有し、該防湿層の厚み
と該成形体の厚みとの比（前者／後者）が１／２〜１／
１００であるパルプモールド容器を提供することにより
上記目的を達成したものである。According to the present invention, there is provided a pulp molded article having a resin layer having a thickness of 5 to 300 μm formed of a synthetic resin on an inner surface and / or an outer surface thereof. Ratio to the thickness (former / latter) is 1/2 to 1 /
The above object has been attained by providing a pulp mold container of 100.
【０００６】[0006]
【発明の実施の形態】以下、本発明のパルプモールド容
器を、その好ましい実施形態に基づき図面を参照しなが
ら説明する。図１（ａ）には本発明の一実施形態のパル
プモールド容器（以下、単に容器ともいう）の斜視図
が、一部切り欠かれた状態で示されている。また、図１
（ｂ）には、図１（ａ）の縦断面図が示されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A pulp mold container according to the present invention will be described below based on a preferred embodiment with reference to the drawings. FIG. 1A is a perspective view of a pulp mold container (hereinafter, simply referred to as a container) according to an embodiment of the present invention, partially cut away. FIG.
FIG. 1B shows a longitudinal sectional view of FIG.
【０００７】本実施形態の容器１は、パルプモールド成
形体（以下、単に成形体ともいう）２の内面（収容面）
全体に樹脂層３を有するものであり、その上部に開口部
４を有し、更に胴部５及び底部６を有し、更に胴部５に
は、その全周に亘って連続した凹状部７が形成されてい
る。この容器１は、粉状体や粒状体及び液体等の内容物
の収容に好適な中空容器として用いられる。The container 1 of the present embodiment has an inner surface (accommodating surface) of a pulp molded product (hereinafter, also simply referred to as a molded product) 2.
It has a resin layer 3 as a whole, has an opening 4 at the top thereof, further has a trunk 5 and a bottom 6, and further has a concave portion 7 which is continuous over the entire circumference thereof. Are formed. This container 1 is used as a hollow container suitable for accommodating contents such as powders, granules, and liquids.
【０００８】胴部５を構成する前後壁の外面は、容器１
を側面方向から視たときに、容器１の高さ方向に亘って
直線をなすような形状となっている（但し、凹状部７は
除く）。同様に、胴部５を構成する左右側の外面も、容
器１を正面方向から視たときに、容器１の高さ方向に亘
って直線をなすような形状となっている（同様に凹状部
７は除く）。そして、底部６の接地面６’と胴部５の各
壁の外面とのなす角θが、前後壁及び左右壁の何れにお
いても略９０°となるように、各壁が立ち上がってい
る。The outer surfaces of the front and rear walls constituting the body 5 are
Has a shape that forms a straight line over the height direction of the container 1 when viewed from the side (excluding the concave portion 7). Similarly, the outer surfaces on the left and right sides of the body 5 also have a shape that forms a straight line across the height direction of the container 1 when the container 1 is viewed from the front (similarly, the concave portion). 7 is excluded). Each wall rises so that the angle θ formed between the grounding surface 6 ′ of the bottom 6 and the outer surface of each wall of the body 5 is substantially 90 ° in both the front and rear walls and the left and right walls.
【０００９】樹脂層３は、その厚みが５〜３００μｍ、
好ましくは２０〜１５０μｍとなっている。厚みが５μ
ｍ未満では充分な防水・防湿効果が得られないため内容
物の保存安定性が充分でなく、３００μｍ超では樹脂層
３の乾燥に時間を要し、塗布時に塗布液が垂れて樹脂層
３の厚みムラが発生する等の問題が発生してしまう。樹
脂層３の厚みは、容器１の断面を顕微鏡観察することで
測定される。本実施形態の容器１は、上述した特開平１
０−４６５００号公報に記載のモールドトレーと異な
り、成形体２を構成するパルプ繊維の領域と、樹脂層３
を構成する合成樹脂の領域とが明確に区別されている。
即ち、上記公報に記載のモールドトレーでは、高分子化
合物の水溶液が所定含水率のパルプ層の内部に浸透する
ので、パルプ繊維の領域と高分子化合物の領域との境界
が明確にならないが、本実施形態の容器１では、後述す
る製造方法の説明から明らかなように、合成樹脂の浸透
が少ないことから上記の境界が明瞭となる。その結果、
従来よりも少量の合成樹脂によって防水・防湿性を付与
することができ且つ再使用時のパルプ繊維の離解性が良
好となる。The resin layer 3 has a thickness of 5 to 300 μm,
Preferably it is 20 to 150 μm. 5μ thickness
When the thickness is less than m, sufficient storage stability of the contents is not obtained because a sufficient waterproof / moisture-proof effect cannot be obtained. When the thickness exceeds 300 μm, it takes time to dry the resin layer 3. Problems such as uneven thickness will occur. The thickness of the resin layer 3 is measured by observing a cross section of the container 1 with a microscope. The container 1 of the present embodiment is the same as the container disclosed in
Unlike the mold tray described in Japanese Patent Application Laid-Open No. 0-46500, the area of the pulp fiber constituting the molded body 2 and the resin layer 3
Are clearly distinguished from the synthetic resin region constituting
That is, in the mold tray described in the above publication, since the aqueous solution of the polymer compound penetrates into the inside of the pulp layer having a predetermined moisture content, the boundary between the pulp fiber region and the polymer compound region is not clear. In the container 1 of the embodiment, as is clear from the description of the manufacturing method described later, the boundary is clear because the penetration of the synthetic resin is small. as a result,
Waterproofing and moistureproofing can be imparted with a smaller amount of synthetic resin than before, and the pulp fiber disintegration during reuse is improved.
【００１０】樹脂層３の厚みと成形体２の厚みとの相対
的な関係は、前者／後者の比が１／２〜１／１００であ
り、好ましくは１／５〜１／５０である。両者の比が１
／２超であると再使用時の離解性が劣り、１／１００未
満であると充分な防水・防湿性を得ることができない。
尚、成形体２の厚みは、容器１の用途等に応じ、上記比
が１／２〜１／１００となる範囲で適宜調整され、好ま
しくは１００〜３０００μｍ、更に好ましくは５００〜
２０００μｍである。The relative relationship between the thickness of the resin layer 3 and the thickness of the molded body 2 is such that the ratio of the former / the latter is 1/2 to 1/100, preferably 1/5 to 1/50. The ratio of both is 1
If it is more than / 2, the disintegration at the time of reuse is inferior, and if it is less than 1/100, sufficient waterproof and moisture-proof properties cannot be obtained.
In addition, the thickness of the molded body 2 is appropriately adjusted within a range where the above ratio is 1/2 to 1/100, preferably 100 to 3000 μm, and more preferably 500 to
2000 μm.
【００１１】樹脂層３は、各種合成樹脂から形成され
る。合成樹脂としてはアクリル系、スチレン−アクリル
系、エチレン−酢酸ビニル系、スチレン−ブタジエンラ
バー系、ポリビニルアルコール系、塩化ビニリデン系、
ワックス系、フッ素系、シリコーン系の樹脂、これらの
共重合体及びこれらの組み合わせ等が挙げられる。The resin layer 3 is formed from various synthetic resins. As synthetic resins, acrylic, styrene-acrylic, ethylene-vinyl acetate, styrene-butadiene rubber, polyvinyl alcohol, vinylidene chloride,
Examples include wax-based, fluorine-based, and silicone-based resins, copolymers thereof, and combinations thereof.
【００１２】容器１は、カップ法による透湿度（ＪＩＳ
Ｚ ０２０８）が１００ｇ／（m2・24hr）以下、特に
６０ｇ／（m2・24hr）以下であることが、大気中の水分
が吸収されにくくなり、中空容器としての適切な剛性を
保つことができ、内容物の品質が水分の吸収によって損
なわれるのを効果的に防止すること、即ち内容物の保存
安定性を向上させることができる点から好ましい。上記
透湿度の下限値は小さいほど防水・防湿性が向上するの
で好ましいが、現状で到達可能な下限値は０．５ｇ／
（ｍ2 ・２４ｈｒ）程度である。The container 1 has a water vapor transmission rate (JIS) according to a cup method.
When Z 0208) is 100 g / (m 2 · 24 hr) or less, particularly 60 g / (m 2 · 24 hr) or less, it becomes difficult to absorb moisture in the atmosphere, and it is possible to maintain appropriate rigidity as a hollow container. It is preferable because the quality of the contents can be effectively prevented from being impaired by the absorption of moisture, that is, the storage stability of the contents can be improved. It is preferable that the lower limit of the moisture permeability is smaller since the waterproof / moisture-proof property is improved, but the lower limit that can be reached at present is 0.5 g / g.
(M 2 · 24 hr).
【００１３】次に、上述の容器１を製造するための好ま
しい方法を、図２を参照しながら説明する。図２には、
容器１における成形体２を製造する工程のうちの抄紙工
程が順次示されており、具体的には（ａ）は抄紙工程、
（ｂ）は中子挿入工程、（ｃ）は加圧・脱水工程、
（ｄ）は抄紙金型を開き、パルプ層を取り出す工程であ
る。Next, a preferred method for manufacturing the above-described container 1 will be described with reference to FIG. In FIG.
The papermaking process of the process of manufacturing the molded body 2 in the container 1 is sequentially shown. Specifically, (a) shows a papermaking process,
(B) is a core insertion step, (c) is a pressure / dehydration step,
(D) is a step of opening the papermaking mold and taking out the pulp layer.
【００１４】先ず、図２（ａ）に示すように、一組の割
型１１，１２を突き合わせることにより所定形状のキャ
ビティ１３が形成される抄紙金型１０のキャビティ１３
内にパルプスラリーを注入する。各割型１１，１２に
は、外部とキャビティ１３とを連通する複数の連通孔１
４がそれぞれ設けられている。また、各割型１１，１２
の内面は、所定の大きさの網目を有するネット（図示せ
ず）によってそれぞれ被覆されている。本実施形態にお
いては、キャビティ１３の形状は、成形すべき成形体２
の外形に対応した形状となっている。しかし、キャビテ
ィ１３の形状はこれに限定されるものではない。First, as shown in FIG. 2 (a), a cavity 13 of a papermaking mold 10 in which a cavity 13 having a predetermined shape is formed by abutting a pair of split dies 11, 12.
The pulp slurry is poured into the inside. Each of the split dies 11 and 12 has a plurality of communication holes 1 for communicating the outside with the cavity 13.
4 are provided. In addition, each split mold 11, 12
Are respectively covered with a net (not shown) having a mesh of a predetermined size. In the present embodiment, the shape of the cavity 13 depends on the shape of the molding 2 to be molded.
It has a shape corresponding to the external shape of. However, the shape of the cavity 13 is not limited to this.
【００１５】パルプスラリーは、パルプ繊維を主原料と
している。パルプ繊維に加えて他の材料を用いる場合に
は、他の材料の配合量を、得られる成形体２の重量に対
して１〜７０重量％、特に５〜５０重量％とすることが
好ましい。他の材料としてはタルクやカオリナイト等の
無機物、ガラス繊維やカーボン繊維等の無機繊維、ポリ
オレフィン等の合成樹脂の粉末又は繊維、非木材又は植
物質繊維、多糖類等が挙げられる。[0015] The pulp slurry is mainly made of pulp fibers. When another material is used in addition to the pulp fiber, the amount of the other material is preferably 1 to 70% by weight, particularly preferably 5 to 50% by weight based on the weight of the obtained molded body 2. Other materials include inorganic substances such as talc and kaolinite, inorganic fibers such as glass fiber and carbon fiber, powder or fiber of synthetic resin such as polyolefin, non-wood or vegetable fiber, and polysaccharides.
【００１６】次に、割型１１，１２をその外側から吸引
してキャビティ１３内を減圧し、パルプスラリー中の水
分を吸引すると共にパルプ繊維をキャビティ１３の内面
に堆積させる。その結果、キャビティ１３の内面には、
パルプ繊維が堆積されたパルプ層１５が形成される。Next, the inside of the cavity 13 is depressurized by sucking the split molds 11 and 12 from the outside, and the moisture in the pulp slurry is sucked and pulp fibers are deposited on the inner surface of the cavity 13. As a result, on the inner surface of the cavity 13,
A pulp layer 15 on which pulp fibers are deposited is formed.
【００１７】所定量のパルプスラリーがキャビティ１３
内に注入されたらパルプスラリーの注入を停止し、キャ
ビティ１３内を完全に吸引・脱水する。引き続き、図２
（ｂ）に示すように、キャビティ１３内を吸引・減圧す
ると共に、弾性を有し膨張収縮自在で且つ中空状をなす
中子１６をキャビティ１３内に挿入する。中子１６は、
キャビティ１３内において風船のように膨らませてパル
プ層１５をキャビティ１３の内面に押圧してキャビティ
１３の内面形状を付与すると共にパルプ層１５を加圧・
脱水するのに使用される。中子１６は引張強度、反発弾
性及び伸縮性等に優れたウレタン、フッ素系ゴム、シリ
コーン系ゴム又はエラストマー等によって形成されてい
る。また中子１６は中空状をなす袋状のものであっても
よい。A predetermined amount of pulp slurry is supplied to the cavity 13.
When the pulp slurry is injected into the inside, the injection of the pulp slurry is stopped, and the inside of the cavity 13 is completely sucked and dehydrated. Continuing with FIG.
As shown in (b), the inside of the cavity 13 is suctioned and depressurized, and a hollow core 16 which is elastic, expands and contracts, and is hollow is inserted into the cavity 13. Core 16
The pulp layer 15 is inflated like a balloon in the cavity 13 to press the pulp layer 15 against the inner surface of the cavity 13 to give the inner surface shape of the cavity 13 and pressurize / pull the pulp layer 15.
Used to dehydrate. The core 16 is formed of urethane, fluorine-based rubber, silicone-based rubber, elastomer, or the like, which is excellent in tensile strength, rebound resilience, elasticity, and the like. The core 16 may be a hollow bag.
【００１８】次に、図２（ｃ）に示すように、中子１６
内に所定の加圧流体を供給して中子１６を膨張させ、膨
張した中子１６によりパルプ層１５をキャビティ１３の
内面に押圧する。これによりパルプ層１５は、膨張した
中子１６によってキャビティ１３の内面に押し付けら
れ、パルプ層１５にキャビティ１３の内面形状が転写さ
れると共に加圧・脱水が進行する。中子１６を膨張させ
るために用いられる加圧流体としては、例えば圧縮空気
（加熱空気）、油（加熱油）、その他各種の液が使用さ
れる。また、加圧流体を供給する圧力は、０．０１〜５
ＭＰａ、特に０．１〜３ＭＰａであることが好ましい。Next, as shown in FIG.
The core 16 is expanded by supplying a predetermined pressurized fluid therein, and the pulp layer 15 is pressed against the inner surface of the cavity 13 by the expanded core 16. As a result, the pulp layer 15 is pressed against the inner surface of the cavity 13 by the expanded core 16, and the inner surface shape of the cavity 13 is transferred to the pulp layer 15, and pressurization and dehydration proceed. As the pressurized fluid used to expand the core 16, for example, compressed air (heated air), oil (heated oil), and other various liquids are used. The pressure for supplying the pressurized fluid is 0.01 to 5
It is preferable that it is MPa, especially 0.1-3 MPa.
【００１９】パルプ層１５は、その内部からキャビティ
１３の内面に押し付けられるために、その密度が高くな
り（即ち空隙率が低くなり）、後述するように合成樹脂
のエマルジョンを塗布した場合に該エマルジョンがパル
プ層１５内に浸透する量を低く抑えることができる。本
製造方法により得られる成形体２の空隙率は好ましくは
３０〜７０％、更に好ましくは４０〜６０％となる。空
隙率は下記式（１）から算出される。尚、下記式（１）
中、成形体の密度は成形体を一部切り出し、その重量と
厚みから算出され、成形体を構成する材料の密度は、パ
ルプ繊維及びその他の成分の含有比率及び密度から算出
される。Since the pulp layer 15 is pressed against the inner surface of the cavity 13 from the inside, the density of the pulp layer 15 increases (that is, the porosity decreases). Can be suppressed to a low amount permeating into the pulp layer 15. The porosity of the molded body 2 obtained by the present production method is preferably 30 to 70%, more preferably 40 to 60%. The porosity is calculated from the following equation (1). In addition, the following formula (1)
The density of the molded body is calculated from the weight and thickness of a part of the molded body, and the density of the material constituting the molded body is calculated from the content ratio and the density of pulp fiber and other components.
【００２０】[0020]
【数１】 (Equation 1)
【００２１】また、上記押圧によってパルプ層１５の内
面及び外面は平滑になる。その結果、本製造方法により
得られる成形体２の外面又は内面の表面凹凸形状につい
ての中心線平均粗さ（Ｒａ、ＪＩＳ Ｂ ０６０１に準
拠して測定された値）が好ましくは０．１〜５０μｍ、
更に好ましくは０．５〜２０μｍで、最大高さ（Ｒｍａ
ｘ、ＪＩＳ Ｂ ０６０１に準拠して測定された値）が
好ましくは１〜５００μｍ、更に好ましくは５〜１００
μｍとなる。これにより、パルプ層１５へ合成樹脂のエ
マルジョンを過剰に浸透させること無く塗布することが
できる。また、成形体２の外面への印刷を容易に且つき
れいに行うことができる。更に、容器１の外観の印象も
一層良好となる。表面粗さの測定にはサーフコム１２０
Ａ〔（株）東京精密社製〕を用い、測定条件は、カット
オフ：０．８ｍｍ、測定長さ：１０ｍｍ、フィルタ：２
ＣＲ、測定倍率：５００、傾斜補正：直線、極性：標準
とした。Further, the inner surface and the outer surface of the pulp layer 15 are smoothed by the pressing. As a result, the center line average roughness (Ra, a value measured in accordance with JIS B 0601) of the outer surface or inner surface of the molded body 2 obtained by the present production method is preferably 0.1 to 50 μm. ,
More preferably, it is 0.5 to 20 μm, and the maximum height (Rma
x, a value measured in accordance with JIS B 0601) is preferably 1 to 500 μm, more preferably 5 to 100 μm.
μm. Thereby, it is possible to apply the synthetic resin emulsion without excessively penetrating the pulp layer 15. Further, printing on the outer surface of the molded body 2 can be easily and neatly performed. Further, the appearance impression of the container 1 is further improved. Surfcom 120 for measuring surface roughness
A [manufactured by Tokyo Seimitsu Co., Ltd.] was used, and the measurement conditions were cutoff: 0.8 mm, measurement length: 10 mm, and filter: 2
CR, measurement magnification: 500, inclination correction: linear, polarity: standard.
【００２２】上記押圧によってパルプ層１５及び成形体
２の空隙率が低くなり過ぎると、上記エマルジョンの浸
透性が低下し過ぎて逆に樹脂層３との密着性が低下する
場合がある。そこで、該エマルジョンの浸透性を考慮し
て、成形体２のコブ吸水度（ＪＩＳ Ｐ ８１４０）が
５〜６００ｇ／（m2・２分）、特に１０〜２００ｇ／
（m2・２分）となるように成形体２を成形することが好
ましい。If the porosity of the pulp layer 15 and the molded body 2 is too low due to the above pressing, the permeability of the emulsion may be too low, and conversely, the adhesion to the resin layer 3 may be low. Therefore, in consideration of the permeability of the emulsion, the water absorption (JIS P 8140) of the molded article 2 is 5 to 600 g / (m 2 · 2 minutes), particularly 10 to 200 g /
It is preferable to mold the molded body 2 so that (m 2 · 2 minutes).
【００２３】上記押圧によって、キャビティ１３の内面
の形状が複雑であっても精度良くキャビティ１３の内面
の形状がパルプ層１５に転写される。その上、従来の製
造方法と異なり、貼り合わせ工程を用いる必要が無いの
で、得られる成形体２には貼り合わせによるつなぎ目及
び肉厚部は存在しない。その結果、得られる成形体２の
強度が高まると共に外観の印象が良好となる。By the above pressing, the shape of the inner surface of the cavity 13 is accurately transferred to the pulp layer 15 even if the shape of the inner surface of the cavity 13 is complicated. In addition, unlike the conventional manufacturing method, there is no need to use a bonding step, and thus the obtained molded body 2 has no joints and thick portions due to bonding. As a result, the strength of the obtained molded body 2 is increased and the appearance impression is improved.
【００２４】パルプ層１５にキャビティ１３の内面の形
状が十分に転写され且つパルプ層１５を所定の含水率ま
で加圧脱水できたら、図２（ｄ）に示すように、中子１
６内の加圧流体を抜く。これにより中子１６が縮んで元
の大きさに戻る。次いで、縮んだ中子１６をキャビティ
１３内より取出し、更に抄紙金型１０を開いて所定の含
水率を有する湿潤した状態のパルプ層１５を取り出す。
この時点でのパルプ層１５の含水率は、取り扱い性等を
考慮して５０〜８０重量％程度とすることが好ましい。When the shape of the inner surface of the cavity 13 is sufficiently transferred to the pulp layer 15 and the pulp layer 15 can be dewatered under pressure to a predetermined moisture content, the core 1 is removed as shown in FIG.
6. Drain the pressurized fluid in 6. This causes the core 16 to shrink and return to its original size. Next, the contracted core 16 is taken out of the cavity 13, and the papermaking mold 10 is further opened to take out the wet pulp layer 15 having a predetermined moisture content.
At this time, the moisture content of the pulp layer 15 is preferably set to about 50 to 80% by weight in consideration of handleability and the like.
【００２５】取り出されたパルプ層１５は次に予備乾
燥、エマルジョン塗布及び乾燥工程に付される。これら
の工程では、抄紙・脱水を行わない以外は、図２に示す
抄紙工程と同様の装置が用いられ且つほぼ同様の操作が
行われる。即ち、先ず、一組の割型を突き合わせること
により成形すべき成形体２の外形に対応した形状のキャ
ビティが形成される加熱金型を所定温度に加熱し、加熱
金型内に湿潤した状態の上記パルプ層を装填する。The removed pulp layer 15 is then subjected to predrying, emulsion coating and drying steps. In these steps, the same apparatus as that in the paper making step shown in FIG. 2 is used, and almost the same operation is performed, except that paper making and dewatering are not performed. That is, first, a heating mold in which a cavity having a shape corresponding to the outer shape of the molded body 2 to be molded is formed by abutting a pair of split molds is heated to a predetermined temperature, and the heating mold is wetted in the heating mold. Of the above pulp layer.
【００２６】次に、上記抄紙工程で用いた中子１６と同
様の中子を上記パルプ層内に挿入させ、該中子内に加圧
流体を供給して該中子を膨張させ、膨張した該中子によ
り上記パルプ層を上記キャビティの内面に押圧して予備
乾燥させる。中子の材質及び加圧流体の供給圧力は、上
記抄紙工程と同様とすることができる。該中子の押圧に
よって上記パルプ層の密度が更に高くなる（即ち空隙率
が更に低くなる）。Next, a core similar to the core 16 used in the paper making step was inserted into the pulp layer, and a pressurized fluid was supplied into the core to expand the core, thereby expanding the core. The pulp layer is pressed against the inner surface of the cavity by the core and preliminarily dried. The material of the core and the supply pressure of the pressurized fluid can be the same as in the above-described papermaking process. The pressing of the core further increases the density of the pulp layer (ie, further lowers the porosity).
【００２７】上記パルプ層が所定の含水率（０．１〜２
５重量％程度）まで予備乾燥できたら、上記中子内の加
圧流体を抜き、該中子を縮ませて取り出す。次に、上記
パルプ層内に合成樹脂のエマルジョンを所定の噴霧手段
によって噴霧して該エマルジョンを該パルプ層の内面に
塗布し塗膜を形成する。この場合、上述の通り上記パル
プ層の密度が高くなっており空隙率が低いので、上記エ
マルジョンは該パルプ層の内部に浸透しにくい状態とな
っている。従って、該エマルジョンの大部分は該パルプ
層の表面に留まることになり、従来よりも少量のエマル
ジョンの塗布で十分な防水・防湿性を発現させることが
できる。また、再利用時のパルプ繊維の離解性の低下を
防止することもできる。上記エマルジョンとしては、合
成樹脂の粒径が０．０１〜１０μｍ程度のものを用いる
ことが、該エマルジョンの上記パルプ層への浸透のコン
トロールの点から好ましい。The pulp layer has a predetermined water content (0.1 to 2).
(5% by weight), the pressurized fluid in the core is drained, and the core is shrunk and taken out. Next, a synthetic resin emulsion is sprayed into the pulp layer by a predetermined spraying means, and the emulsion is applied to the inner surface of the pulp layer to form a coating film. In this case, since the density of the pulp layer is high and the porosity is low as described above, the emulsion is hardly permeated into the pulp layer. Therefore, most of the emulsion remains on the surface of the pulp layer, and sufficient waterproof and moisture-proof properties can be exhibited by applying a smaller amount of emulsion than before. In addition, it is possible to prevent the disintegration of the pulp fiber during the reuse. It is preferable to use a synthetic resin having a particle size of about 0.01 to 10 μm as the emulsion from the viewpoint of controlling the penetration of the emulsion into the pulp layer.
【００２８】上記の状態下に上記エマルジョンの塗膜及
びパルプ層を加熱金型内で乾燥させて、該塗膜から樹脂
層を形成すると共に該パルプ層から成形体２を形成す
る。両者が十分に乾燥したら加熱金型を開いて、成形体
２の内面に樹脂層３を有する容器１を取り出す。Under the above conditions, the coating film of the emulsion and the pulp layer are dried in a heating mold to form a resin layer from the coating film and to form a molded body 2 from the pulp layer. When both are sufficiently dried, the heating mold is opened, and the container 1 having the resin layer 3 on the inner surface of the molded body 2 is taken out.
【００２９】本発明は上述した実施形態に制限されず、
例えば、成形体２の外面にのみ又は成形体２の内外面に
樹脂層を形成してもよい。また、容器１の使用に際して
負荷がかかる部分、例えば開口部４や底部６にプラスチ
ック等からなる補強部材を配して、容器１の耐久性を向
上させるようにしてもよい。また、これらの部分の一部
をプラスチック等から形成してもよい。また、本発明の
容器は、開口部の開口面積が、胴部の断面積よりも小さ
いボトル型の容器となしてもよい。The present invention is not limited to the embodiments described above,
For example, the resin layer may be formed only on the outer surface of the molded body 2 or on the inner and outer surfaces of the molded body 2. In addition, a reinforcing member made of plastic or the like may be provided at a portion where a load is applied when the container 1 is used, for example, at the opening 4 or the bottom 6 to improve the durability of the container 1. Further, some of these parts may be formed of plastic or the like. In addition, the container of the present invention may be a bottle-shaped container in which the opening area of the opening is smaller than the cross-sectional area of the body.
【００３０】[0030]
【発明の効果】本発明によれば、従来よりも少量の原料
によって防水・防湿性を付与することができる防水・防
湿性を有するパルプモールド容器が提供される。また、
本発明によれば、パルプ繊維の離解性が高く再利用の容
易な防水・防湿性を有するパルプモールド容器が提供さ
れる。According to the present invention, there is provided a pulp mold container having waterproof / moisture-proof properties that can be provided with waterproof / moisture-proof properties using a smaller amount of raw materials than in the prior art. Also,
ADVANTAGE OF THE INVENTION According to this invention, the pulp mold container which has the defibration property of pulp fiber and which is easy to reuse and has a waterproof and moisture-proof property.
【図１】図１（ａ）は、本発明の防水・防湿性を有する
パルプモールド容器の一実施形態を一部切り欠いて示す
斜視図であり、図１（ｂ）は図１（ａ）におけるＩ−Ｉ
線断面図である。FIG. 1 (a) is a partially cutaway perspective view showing one embodiment of a waterproof / moistureproof pulp mold container of the present invention, and FIG. 1 (b) is FIG. 1 (a). II at
It is a line sectional view.
【図２】容器１における成形体２を製造する工程のうち
の抄紙工程を順次示す模式図である。FIG. 2 is a schematic view sequentially showing a paper making step of a step of manufacturing a molded body 2 in a container 1.
【符号の説明】 １ 防水・防湿性を有するパルプモールド容器 ２ パルプモールド成形体 ３ 樹脂層 ４ 開口部 ５ 胴部 ６ 底部[Description of Signs] 1 Pulp mold container having waterproof and moisture-proof properties 2 Pulp molded article 3 Resin layer 4 Opening 5 Body 6 Bottom
─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成１２年７月１７日（２０００．７．１
７）[Submission Date] July 17, 2000 (2007.1)
7)
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】特許請求の範囲[Correction target item name] Claims
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【特許請求の範囲】[Claims]
【手続補正２】[Procedure amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００５[Correction target item name] 0005
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【０００５】[0005]
【課題を解決するための手段】本発明は、パルプモール
ド成形体の内面及び／又は外面に、合成樹脂を含む塗布
液の塗布により形成された厚み５〜３００μｍの樹脂層
を有し、該樹脂層の厚みと該成形体の厚みとの比（前者
／後者）が１／２〜１／１００であり、上記パルプモー
ルド成形体の外面又は内面の表面凹凸形状についての中
心線平均粗さ（Ｒａ）が０．５〜２０μｍであるパルプ
モールド容器を提供することにより上記目的を達成した
ものである。According to the present invention, there is provided a pulp molded article having an inner surface and / or an outer surface coated with a synthetic resin.
Has a resin layer of a thickness 5~300μm formed by coating liquid, the ratio of the thicknesses of the molded article of the resin layer (the former / the latter) is Ri 1 / 2-1 / 100 der, the Pulp Mo
Of the surface irregularities on the outer or inner surface of the
It is obtained by achieving the above objects by center line average roughness (Ra) to provide a pulp mold container Ru 0.5~20μm der.
【手続補正３】[Procedure amendment 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００２１[Correction target item name] 0021
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００２１】また、上記押圧によってパルプ層１５の内
面及び外面は平滑になる。その結果、本製造方法により
得られる成形体２の外面又は内面の表面凹凸形状につい
ての中心線平均粗さ（Ｒａ、ＪＩＳ Ｂ ０６０１に準
拠して測定された値）が０．５〜２０μｍで、最大高さ
（Ｒｍａｘ、ＪＩＳ Ｂ ０６０１に準拠して測定され
た値）が好ましくは１〜５００μｍ、更に好ましくは５
〜１００μｍとなる。これにより、パルプ層１５へ合成
樹脂のエマルジョンを過剰に浸透させること無く塗布す
ることができる。また、成形体２の外面への印刷を容易
に且つきれいに行うことができる。更に、容器１の外観
の印象も一層良好となる。表面粗さの測定にはサーフコ
ム１２０Ａ〔（株）東京精密社製〕を用い、測定条件
は、カットオフ：０．８ｍｍ、測定長さ：１０ｍｍ、フ
ィルタ：２ＣＲ、測定倍率：５００、傾斜補正：直線、
極性：標準とした。Further, the inner surface and the outer surface of the pulp layer 15 are smoothed by the pressing. As a result, the center line average roughness (Ra, a value measured in accordance with JIS B 0601) of the outer surface or the inner surface of the molded body 2 obtained by the present production method is 0 . The maximum height (Rmax, a value measured in accordance with JIS B 0601) is preferably 1 to 500 μm, more preferably 5 to 20 μm.
１００100 μm. Thereby, it is possible to apply the synthetic resin emulsion without excessively penetrating the pulp layer 15. Further, printing on the outer surface of the molded body 2 can be easily and neatly performed. Further, the appearance impression of the container 1 is further improved. Surfcom 120A (manufactured by Tokyo Seimitsu Co., Ltd.) was used to measure the surface roughness, and the measurement conditions were cutoff: 0.8 mm, measurement length: 10 mm, filter: 2CR, measurement magnification: 500, and tilt correction: Straight line,
Polarity: Standard.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 石川 雅隆 栃木県芳賀郡市貝町赤羽2606 花王株式会 社研究所内 Ｆターム(参考） 3E033 AA06 BA13 BB02 DA02 DD05 EA04 EA05 4F071 AA09 AA73 AF08Y AF10Y AH05 BC02 BC04 BC12 BC16 4L055 AG56 AH50 BF09 EA08 EA10 EA12 EA18 EA27 FA19 GA05 GA50 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masataka Ishikawa 2606 Kabanecho, Haga-gun, Tochigi Pref. BC16 4L055 AG56 AH50 BF09 EA08 EA10 EA12 EA18 EA27 FA19 GA05 GA50
Claims (5)
外面に合成樹脂から形成された厚み５〜３００μｍの樹
脂層を有し、該樹脂層の厚みと該成形体の厚みとの比
（前者／後者）が１／２〜１／１００であるパルプモー
ルド容器。A pulp molded article has a resin layer formed of a synthetic resin and having a thickness of 5 to 300 μm on an inner surface and / or an outer surface thereof, and a ratio of the thickness of the resin layer to the thickness of the molded body (the former / A pulp mold container wherein the latter is 1/2 to 1/100.
面の表面凹凸形状についての中心線平均粗さ（Ｒａ）が
０．１〜５０μｍで、最大高さ（Ｒｍａｘ）が１〜５０
０μｍであり、且つ該成形体のコブ吸水度が５〜６００
ｇ／（m2・２分）である請求項１記載のパルプモールド
容器。2. The pulp molded article has a centerline average roughness (Ra) of 0.1 to 50 μm and a maximum height (Rmax) of 1 to 50 for the surface irregularities on the outer or inner surface.
0 µm, and the molded article has a bump water absorption of 5 to 600.
g / (m 2 · 2 minutes) pulp mold container according to claim 1, wherein.
０〜７０％である請求項１又は２記載のパルプモールド
容器。3. The pulp molded article having a porosity of 3
The pulp mold container according to claim 1, which is 0 to 70%.
・24hr）以下である請求項１〜３の何れかに記載のパル
プモールド容器。4. Moisture permeability by a cup method is 100 g / (m 2
The pulp mold container according to any one of claims 1 to 3, which is not longer than 24 hours.
し、次いで弾性を有し膨張収縮自在で且つ中空状をなす
中子を該キャビティ内に挿入し、該中子内に加圧流体を
供給して該中子を膨張させ、該中子によって上記パルプ
層を上記キャビティの内面に押圧して脱水した後予備乾
燥させ、予備乾燥された該パルプ層の内面及び／又は外
面に合成樹脂のエマルジョンの塗膜を形成し、該塗膜及
び該パルプ層を乾燥させて得られる請求項１〜４の何れ
かに記載のパルプモールド容器。5. A pulp layer is formed on an inner surface of a cavity of a mold, and a hollow core, which is elastic, expands and contracts, and is hollow, is inserted into the cavity, and a pressurized fluid is injected into the core. The pulp layer is supplied to expand the core, the pulp layer is pressed against the inner surface of the cavity by the core, dewatered, and then pre-dried, and the inner and / or outer surfaces of the pre-dried pulp layer are made of synthetic resin. The pulp mold container according to any one of claims 1 to 4, which is obtained by forming a coating film of an emulsion and drying the coating film and the pulp layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000013556A JP3583341B2 (en) | 1999-04-01 | 2000-01-21 | Pulp mold container |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11-95462 | 1999-04-01 | ||
| JP9546299 | 1999-04-01 | ||
| JP2000013556A JP3583341B2 (en) | 1999-04-01 | 2000-01-21 | Pulp mold container |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000215998A Division JP2001039429A (en) | 1999-04-01 | 2000-07-17 | Manufacture of pulp mold container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000344221A true JP2000344221A (en) | 2000-12-12 |
| JP3583341B2 JP3583341B2 (en) | 2004-11-04 |
Family
ID=26436684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000013556A Expired - Lifetime JP3583341B2 (en) | 1999-04-01 | 2000-01-21 | Pulp mold container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3583341B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002225837A (en) * | 2001-01-24 | 2002-08-14 | Kao Corp | Container |
| JP2002363899A (en) * | 2001-05-31 | 2002-12-18 | Toppan Printing Co Ltd | Pulp mold base and gas barrier container using the same |
| JP2007291600A (en) * | 2001-08-03 | 2007-11-08 | Kao Corp | Molded pulp product |
| JP2010084267A (en) * | 2008-09-30 | 2010-04-15 | Toyota Tsusho Corp | Method for producing molded pulp product, molded pulp product, and mold |
-
2000
- 2000-01-21 JP JP2000013556A patent/JP3583341B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002225837A (en) * | 2001-01-24 | 2002-08-14 | Kao Corp | Container |
| JP2002363899A (en) * | 2001-05-31 | 2002-12-18 | Toppan Printing Co Ltd | Pulp mold base and gas barrier container using the same |
| JP2007291600A (en) * | 2001-08-03 | 2007-11-08 | Kao Corp | Molded pulp product |
| JP2010084267A (en) * | 2008-09-30 | 2010-04-15 | Toyota Tsusho Corp | Method for producing molded pulp product, molded pulp product, and mold |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3583341B2 (en) | 2004-11-04 |
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