JP2005153146A - Coated molded product and its manufacturing method - Google Patents
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Abstract
Description
本発明は、有底箱型あるいは有底筒型をした成形品に意匠性、耐水性、断熱性、軽量性、割れにくさ性等の機能を付与した被覆成形品およびその製造方法に関する。
に関する。
The present invention relates to a coated molded product in which functions such as designability, water resistance, heat insulation, light weight, and resistance to cracking are imparted to a molded product having a bottomed box shape or a bottomed cylindrical shape, and a method for producing the same.
About.
従来のカップやトレーと言った有底箱型あるいは有底筒型をした成形品は、その基材そのものの性質から脱却する事ができない。
すなわち、紙を基材したカップ等は、耐水性に劣ったり、内側に模様印刷をする事ができないし、パルプモールドなどの通気性がある基材から形成されたトレーやどんぶり等の容器の場合、印刷性が悪い上に、水などの漏洩、容器の内外壁面のザラザラを拭い去ることができないので安全衛生上好ましくないなどの問題がある。
A molded product having a bottomed box shape or a bottomed cylindrical shape such as a conventional cup or tray cannot be escaped from the properties of the base material itself.
In other words, paper-based cups are poor in water resistance, cannot be printed on the inside, and are containers such as trays and bowls formed from breathable substrates such as pulp molds. In addition to poor printability, there are problems such as leakage of water and the like, and the rough surface of the inner and outer walls of the container cannot be wiped off, which is undesirable in terms of safety and hygiene.
そこで、本発明の発明者は、このような問題を解決するために、通気性を有する基材からなる成形品をまず成形し、この成形品の上面を樹脂フィルムで覆うとともに、成形品の下面側を真空状態にして樹脂フィルムを成形品の上面形状に沿うように真空成形し、成形品の内壁面を樹脂フィルムで被覆する被覆成形品の製造方法をすでに提案している（特許文献１参照）。 Therefore, in order to solve such problems, the inventor of the present invention first molded a molded product made of a base material having air permeability, and covered the upper surface of the molded product with a resin film, and the lower surface of the molded product. There has already been proposed a method for producing a coated molded product in which the resin film is vacuum-formed so as to conform to the upper surface shape of the molded product with the side being in a vacuum state, and the inner wall surface of the molded product is covered with the resin film (see Patent Document 1) ).
しかし、上記被覆成形品の製造方法は、成形品の内壁面しか被覆することができないため、マフィン等の焼き菓子用の容器などのように内壁面のみ耐水性を備えていればよい被覆成形品の製造に適しているが、紙コップなどのように上部開口部に口を付けたりするようなものにおいては、上部開口部付近の外壁面が被覆されていないため、衛生的に問題があるとともに、外壁面のざらざら感を解消できない。
したがって、上記問題を解消するために、成形品に予め防水処理をほどこすか、印刷面をオーバーコートした紙等を用いて成形品を組み立てる方法を取らざるを得ないが、かかる方法では、防水処理剤や接着剤に耐熱性や安全衛生上の制約が生じる。
However, since the method for producing a coated molded product can coat only the inner wall surface of the molded product, it is sufficient that only the inner wall surface has water resistance such as a container for baked confectionery such as a muffin. Although it is suitable for the manufacture of products such as paper cups that have a mouth in the upper opening, the outer wall surface near the upper opening is not covered, so there is a sanitary problem. The rough feeling of the outer wall surface cannot be resolved.
Therefore, in order to solve the above problem, it is necessary to take a method of preliminarily waterproofing the molded product or assembling the molded product using paper or the like with an overcoated printing surface. Restrictions on heat resistance and safety and hygiene occur in adhesives and adhesives.
また、この被覆成形品の製造方法では、成形品が非通気性の材質で形成されている場合には被膜を形成することができなかった。 Further, in this method for producing a coated molded product, a coating film cannot be formed when the molded product is formed of a non-breathable material.
本発明は、上記事情に鑑みて、成形品が通気性のある材質で形成されていても、非通気性の材質で形成されていても、内壁面だけではなく、開口部周縁の成形品外壁面までも被覆された被覆成形品およびその製造方法を提供することを目的としている。 In view of the above circumstances, the present invention provides not only the inner wall surface but also the outer periphery of the molded product outside the molded product, regardless of whether the molded product is formed of a breathable material or a non-breathable material. It is an object of the present invention to provide a coated molded article in which even a wall surface is coated and a method for producing the same.
上記目的を達成するために、本発明にかかる被覆成形品は、有底箱型あるいは有底筒型をした成形品の内壁面および開口部周縁を含む外壁面の少なくとも一部が、１枚の樹脂フィルムを壁面に密着するように真空成形させることによって形成された被膜によって被覆されていることを特徴としている。 In order to achieve the above object, the coated molded product according to the present invention has at least part of the inner wall surface and the outer wall surface including the periphery of the opening of a molded product having a bottomed box shape or a bottomed cylindrical shape. It is characterized by being covered with a film formed by vacuum forming a resin film so as to be in close contact with the wall surface.
一方、本発明にかかる被覆成形品の製造方法は、有底箱型あるいは有底筒型をした成形品を、その上端部が少なくとも真空箱の天板に設けられた孔から真空箱の天板上面より外部に露出するように前記孔を臨むように配置された支持具によって下方から支持するとともに、前記孔の内周面と前記支持具および成形品との間に隙間を形成した状態に配置したのち、成形品および真空箱上面を軟化状態にされた樹脂フィルムによって気密に覆った状態で、真空箱内を負圧にする工程を備えていることを特徴としている。 On the other hand, the method for producing a coated molded product according to the present invention comprises a bottomed box type or a bottomed cylindrical type molded product, wherein the top end of the vacuum box is at least through a hole provided in the top plate of the vacuum box. It is supported from below by a support tool arranged to face the hole so as to be exposed to the outside from the upper surface, and is arranged in a state where a gap is formed between the inner peripheral surface of the hole and the support tool and the molded product. After that, it is characterized in that it includes a step of applying a negative pressure to the inside of the vacuum box while the molded product and the upper surface of the vacuum box are hermetically covered with the softened resin film.
本発明において使用される樹脂フィルムとしては、特に限定されないが、溶融押出法で製造された実質的未延伸の樹脂フィルムが好ましく、また、その厚みは、０．０２mm〜０．８０mmが好ましい。
また、樹脂フィルムには、予め、成形品の壁面に接着する面に印刷や接着層を設けるなどその他の加工を施すことができる。
Although it does not specifically limit as a resin film used in this invention, The substantially unstretched resin film manufactured by the melt extrusion method is preferable, and the thickness has preferable 0.02 mm-0.80 mm.
In addition, the resin film can be subjected to other processing such as printing or an adhesive layer on the surface to be bonded to the wall surface of the molded product in advance.
樹脂フィルムの材質は、熱可塑性樹脂であれば特に限定されないが、たとえば、ポリエステル、ポリプロピレン、ポリスチレン、ポリ塩化ビニル等、およびそれらの共重合物が挙げられ、この中でもポリエチレンテレフタレートやポリエチレンナフタレート等のポリエステルやこれらの共重合物がより好ましく、着色剤、結晶核剤などの有機や無機の添加剤を含んでいても構わない。
また、本発明の被覆成形品を耐熱性容器として用いる場合には、樹脂フィルムは、結晶核剤を添加することにより結晶化された結晶化ポリエチレンテレフタレート（たとえば、東洋紡績社製のＣ−ＰＥＴ）が好ましい。
The material of the resin film is not particularly limited as long as it is a thermoplastic resin, and examples thereof include polyester, polypropylene, polystyrene, polyvinyl chloride, and copolymers thereof, and among these, polyethylene terephthalate, polyethylene naphthalate, etc. Polyester and copolymers thereof are more preferable and may contain organic and inorganic additives such as a colorant and a crystal nucleating agent.
When the coated molded product of the present invention is used as a heat-resistant container, the resin film is a crystallized polyethylene terephthalate crystallized by adding a crystal nucleating agent (for example, C-PET manufactured by Toyobo Co., Ltd.). Is preferred.
ポリエチレンテレフタレートやポリエチレンナフタレートの共重合成分としては、酸性分では、テレフタル酸、２，６−ナフタレンジカルボン酸以外に、イソフタール酸、ヘキサヒドロテレフタル酸、ヘキサヒドロイソフタール酸、ヒドロキシ安息香酸、ジフェニルジカルボン酸、ジフェンニルエーテルジカルボン酸、ジフェニルスルホンジカルボン酸、ジフェノキシエタンジカルボン酸、３，５ージカルボキシベンゼンスルホン酸、シュウ酸、コハク酸、グルタル酸、セバシン酸等が挙げられる。 As a copolymerization component of polyethylene terephthalate and polyethylene naphthalate, in addition to terephthalic acid and 2,6-naphthalenedicarboxylic acid, isophthalic acid, hexahydroterephthalic acid, hexahydroisophthalic acid, hydroxybenzoic acid, diphenyldicarboxylic acid can be used for acidic components. Examples include acid, diphennyl ether dicarboxylic acid, diphenylsulfone dicarboxylic acid, diphenoxyethanedicarboxylic acid, 3,5-dicarboxybenzenesulfonic acid, oxalic acid, succinic acid, glutaric acid, and sebacic acid.
ジオール成分としては、シクロヘキサンジメタノール、１，２−プロピレングリコール、トリメチレングリコール、テトラメチレングリコール、ペンタメチレングリコール、ヘキサメチレングリコール、ネオペンチルグリコール、１，４−ビスヒドロキシベンゼンやポリアルキレングリコール、等が挙げられる。 Examples of the diol component include cyclohexanedimethanol, 1,2-propylene glycol, trimethylene glycol, tetramethylene glycol, pentamethylene glycol, hexamethylene glycol, neopentyl glycol, 1,4-bishydroxybenzene, polyalkylene glycol, and the like. Can be mentioned.
また、三官能以上の化合物、例えば、ポリエチレングリコール、ポリテトラメチレングリコール、ポリプロピレングリコール、グリセリン、ペンタエリスリトール、トリメリット酸、５−ヒドロキシイソフタル酸等 をポリマーが実質的に線状である程度に使用してもよく、さらには単官能化合物、例えば、Ｐ−フェニルフェノール、ベンジルオキシ安息香酸、ナフタレンモノカルボン酸、ポリエチレングリコールモノメチレンエーテル等を用いても良い。 Further, trifunctional or higher functional compounds such as polyethylene glycol, polytetramethylene glycol, polypropylene glycol, glycerin, pentaerythritol, trimellitic acid, 5-hydroxyisophthalic acid, etc. are used to some extent where the polymer is substantially linear. Furthermore, monofunctional compounds such as P-phenylphenol, benzyloxybenzoic acid, naphthalene monocarboxylic acid, polyethylene glycol monomethylene ether, and the like may be used.
結晶核剤としては、たとえば、雲母、シリカ等の無機粉体やポリオレフィン、ポリオキシメチレン、ポリスチレン等の結晶性高分子化合物が挙げられ、低密度又は高密度のポリエチレンが好適である。結晶核剤の配合量は、結晶核剤として結晶性高分子化合物を用いる場合、好ましくは１重量％以上〜８重量％以下、より好ましくは、２重量％以上〜６重量％以下である。
樹脂フィルムの結晶化度は、１０％以上〜４０％以下が好ましく、２０％以上〜３５％以下がより好ましい。すなわち、結晶化度が１０％より小さいと得られる被覆成形品に十分な耐熱性を付与できず、４０％より大きいと過結晶状態となり、得られる被覆成形品の耐衝撃性が低下してしまう恐れがある。
Examples of the crystal nucleating agent include inorganic powders such as mica and silica, and crystalline polymer compounds such as polyolefin, polyoxymethylene, and polystyrene. Low density or high density polyethylene is preferable. When the crystalline polymer compound is used as the crystal nucleating agent, the amount of the crystal nucleating agent is preferably 1% by weight to 8% by weight, more preferably 2% by weight to 6% by weight.
The crystallinity of the resin film is preferably 10% to 40%, more preferably 20% to 35%. That is, if the degree of crystallinity is less than 10%, sufficient heat resistance cannot be imparted to the resulting coated molded product, and if it is larger than 40%, it becomes an overcrystallized state and the impact resistance of the resulting coated molded product is reduced. There is a fear.
本発明の樹脂フィルムに用いられるポリエステルの極限粘度は、０．６ｄｌ／ｇ〜１．３ｄｌ／ｇが好ましく、より好ましくは０．７ｄｌ／ｇ〜０．１２ｄｌ／ｇ、さらに好ましくは０．７５〜０．１１ｄｌ／ｇである。 The intrinsic viscosity of the polyester used in the resin film of the present invention is preferably 0.6 dl / g to 1.3 dl / g, more preferably 0.7 dl / g to 0.12 dl / g, and still more preferably 0.75 to 0.75. 0.11 dl / g.
被覆される成形品の材質としては、特に限定されないが、たとえば、プラスチック、不織布、織布、紙、木質材料やパルプモールド等あるいはこれらの積層材料が挙げられる。
成形品の厚みは特に限定しないが、たとえば、紙コップ等の紙製成形品の場合は、１０μm〜４mm程度、坪量として５０ｇ／ｍ2〜５００ｇ／ｍ2で表現される厚みが用いられる。
また、成形品に用いられるプラスチックとしては、特に限定されず、たとえば、被覆される樹脂フィルムと同じ材質のものも使用できる。
The material of the molded article to be coated is not particularly limited, and examples thereof include plastic, non-woven fabric, woven fabric, paper, wood material, pulp mold and the like, or laminated materials thereof.
The thickness of the molded article is not particularly limited, for example, in the case of paper moldings such as paper cups, about 10Myuemu～4mm, the thickness represented by 50g / m 2 ~500g / m 2 basis weight is used.
Moreover, it does not specifically limit as a plastic used for a molded article, For example, the thing of the same material as the resin film to coat | cover can be used.
本発明の被覆成形品の製造方法において、真空箱の上面に設けられる孔の大きさは、所定位置にセットされた成形品との間に全周にわたって隙間が形成されれば特に限定されないが、成形品の上部開口の周長の−７５％〜＋３０％程度の周長を備えていることが好ましい。
また、孔は、真空箱の上面を形成する天板を真空箱本体に着脱自在にし、この天板に孔を設けることが好ましい。そして、成形品の大きさが変われば、成形品に応じた形状や大きさの孔を備えた別の天板に交換するようにすることが好ましい。
In the method for producing a coated molded product of the present invention, the size of the hole provided on the upper surface of the vacuum box is not particularly limited as long as a gap is formed over the entire circumference with the molded product set at a predetermined position, It is preferable to have a circumference of about -75% to + 30% of the circumference of the upper opening of the molded product.
Moreover, it is preferable that a hole makes a top plate which forms the upper surface of a vacuum box detachable with respect to a vacuum box main body, and provides a hole in this top plate. And if the magnitude | size of a molded article changes, it is preferable to replace | exchange for another top plate provided with the hole of the shape and magnitude | size according to a molded article.
成形品の真空箱の上部からの露出高さは、特に限定されないが、露出高さを高くすると、被膜が成形品の外壁面の下端付近まで形成される。
成形品の真空箱からの露出高さの調整は、特に限定されないが、たとえば、真空箱の底面に着脱自在でその上面で成形品の底を下方から受ける高さの異なる複数の支持具を用意し、いずれかの支持具を選択して真空箱に装着する方法、高さ調整機構付きの支持具を用いる方法等を用いることができる。
The exposed height of the molded product from the upper part of the vacuum box is not particularly limited. However, when the exposed height is increased, the coating is formed to the vicinity of the lower end of the outer wall surface of the molded product.
The adjustment of the exposure height of the molded product from the vacuum box is not particularly limited. For example, a plurality of supports that are detachable from the bottom surface of the vacuum box and receive the bottom of the molded product from below on the top surface are prepared. In addition, a method of selecting any one of the support tools and mounting it on the vacuum box, a method using a support tool with a height adjustment mechanism, or the like can be used.
樹脂フィルムの軟化状態とは、樹脂の材質によっても異なるが、一般に、Ｔｇ（ガラス転移温度）＋３０℃〜Ｔｇ＋１５０℃の温度に加熱した状態が好ましく、Ｔｇ＋５０℃〜Ｔｇ＋１２０℃に加熱して状態がより好ましい。
樹脂フィルムを軟化させる時期は、成形品の上面に樹脂フィルムをセットした後、あるいはセットする前のいずれでも構わない。
The softened state of the resin film differs depending on the material of the resin, but generally, a state heated to a temperature of Tg (glass transition temperature) + 30 ° C. to Tg + 150 ° C. is preferable, and a state heated to Tg + 50 ° C. to Tg + 120 ° C. is more preferable. preferable.
The time for softening the resin film may be either after setting the resin film on the upper surface of the molded product or before setting.
本発明の、被覆成形品は、通常の真空成形機の外、プラグアシスト真空成形機、圧空真空成形機等で容易に容器等の被覆成形品を得ることができる。成形品としては、トレイ、どんぶり容器、カップ、焼き菓子用マフィン等が有る。 The coated molded product of the present invention can be easily obtained as a coated molded product such as a container by using a plug assist vacuum molding machine, a compressed air vacuum molding machine or the like in addition to a normal vacuum molding machine. Molded products include trays, bowls, cups, baked goods muffins, and the like.
本発明は、以上のように、真空成形機を用いて１枚の樹脂フィルムによって有底箱型あるいは有底筒型の成形品の内外壁面を一度に被覆することができ、製造が容易である。そして、樹脂フィルムに印刷層を設けておけば、被覆と同時に成形品の内外壁面に装飾を施すことができる。また、樹脂フィルムとして結晶化された結晶化ポリエチレンテレフタレートが用いれば、被覆によって耐熱性および耐衝撃性を付与することができる。勿論、外壁面に被覆部にも耐水性を付与することができるとともに、成形品表面のザラツキも被膜によって解消できる。 As described above, according to the present invention, the inner and outer wall surfaces of a bottomed box-type or bottomed-tube type molded product can be covered at once with a single resin film using a vacuum molding machine, and manufacturing is easy. . If a printing layer is provided on the resin film, the inner and outer wall surfaces of the molded product can be decorated simultaneously with the coating. If crystallized polyethylene terephthalate crystallized as a resin film is used, heat resistance and impact resistance can be imparted by coating. Of course, the outer wall surface can be given water resistance to the covering portion, and the roughness of the surface of the molded product can be eliminated by the coating.
以下に、本発明を、その実施の形態をあらわす図面を参照しつつ詳しく説明する。
図１は、本発明にかかる被覆成形品の製造方法の１実施の形態をあらわしている。
Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
FIG. 1 shows an embodiment of a method for producing a coated molded product according to the present invention.
図１に示すように、この製造方法は、まず、天板１１に１つの孔１２を備えた真空箱１と支持枠３とを備える真空成形機４を用意する。
そして、図１（ａ）に示すように、ロッド状をした支持具５が孔１２を下方から臨む位置にセットされた真空箱１に、その底６１が天板１１より下方にある支持具５の上面で受けられるように、成形品としての紙製コップ６の下端部を孔１２から真空箱１内に挿入する。
As shown in FIG. 1, this manufacturing method first prepares a vacuum forming machine 4 including a vacuum box 1 provided with one hole 12 in a top plate 11 and a support frame 3.
Then, as shown in FIG. 1A, the support 5 in which the rod-like support 5 is set at a position facing the hole 12 from below, and the bottom 61 is below the top plate 11. The lower end portion of the paper cup 6 as a molded product is inserted into the vacuum box 1 through the hole 12 so as to be received by the upper surface of the vacuum box 1.
つぎに、支持枠３に結晶核剤を添加することにより結晶化された結晶化ポリエチレンテレフタレートで形成されたフィルム状基材の一方の面に印刷層および接着層が積層された樹脂フィルム２を接着層側が紙製コップ６側に向くようにセットした状態でヒータ（図示せず）で、樹脂フィルム２をＴｇ＋３０℃〜Ｔｇ＋１５０℃程度まで加熱して軟化状態にしたのち、図１（ｂ）に示すように支持枠３を真空箱１の天板１１の上面に気密状態に密着させる。
真空箱１内の空気を真空ポンプ（図示せず）によって排気し、真空箱１内を負圧状態にして、図１（ｃ）に示すように、紙製コップ６の内壁面全面および外壁面の略下端まで樹脂フィルム２によって被覆させたのち、被覆部以外の樹脂フィルム２を切り取り、被覆成形品としての被覆紙コップ７を得る。
Next, the resin film 2 in which the printing layer and the adhesive layer are laminated on one surface of the film-like substrate formed of crystallized polyethylene terephthalate crystallized by adding a crystal nucleating agent to the support frame 3 is adhered. In a state where the layer side is set to face the paper cup 6 side, the resin film 2 is heated to about Tg + 30 ° C. to Tg + 150 ° C. with a heater (not shown) and then softened, and then shown in FIG. In this manner, the support frame 3 is brought into close contact with the upper surface of the top plate 11 of the vacuum box 1 in an airtight state.
Air in the vacuum box 1 is evacuated by a vacuum pump (not shown), the inside of the vacuum box 1 is brought into a negative pressure state, and the entire inner wall surface and outer wall surface of the paper cup 6 as shown in FIG. After being covered with the resin film 2 to the substantially lower end, the resin film 2 other than the covering portion is cut out to obtain a coated paper cup 7 as a coated molded product.
すなわち、真空箱１内を減圧していくと、紙製コップ６内も負圧状態になり、樹脂フィルム２の紙製コップ６の内部を臨む部分が、延伸されつつ紙製コップ６の内壁面６２に沿うように変形し、最終的に内壁面６２に密着し、接着層を介して接着される。
また、樹脂フィルム２の紙製コップ６の開口部より外側にある部分が孔１２と紙製コップ６との隙間Ｓから真空箱１内に吸引されて紙製コップ６の外壁面６３に密着し、接着層を介して接着される。
That is, when the inside of the vacuum box 1 is depressurized, the inside of the paper cup 6 is also in a negative pressure state, and the portion of the resin film 2 facing the inside of the paper cup 6 is stretched while the inner wall surface of the paper cup 6 is stretched. It deform | transforms so that 62 may be followed, it closely_contact | adheres to the inner wall surface 62 finally, and it adhere | attaches through an adhesive layer.
Further, the portion of the resin film 2 outside the opening of the paper cup 6 is sucked into the vacuum box 1 through the gap S between the hole 12 and the paper cup 6 and is in close contact with the outer wall surface 63 of the paper cup 6. And bonded through an adhesive layer.
以上のように、この被覆成形品の製造方法によれば、真空成形機４を用いて１枚の樹脂フィルム２によって紙製コップ６の内外壁面を一度に被覆することができ、製造が容易である。そして、樹脂フィルム２に印刷層が設けられているので、被覆と同時に紙製コップ６の内外壁面に装飾を施すことができる。また、樹脂フィルム２として結晶化された結晶化ポリエチレンテレフタレートが用いられているので、被覆によって耐熱性および耐衝撃性を付与することができる。 As described above, according to the method for manufacturing a coated molded product, the inner and outer wall surfaces of the paper cup 6 can be covered at once with the single resin film 2 using the vacuum forming machine 4, and the manufacturing is easy. is there. And since the printing layer is provided in the resin film 2, decoration can be given to the inner and outer wall surface of the paper cup 6 simultaneously with covering. Moreover, since the crystallized polyethylene terephthalate crystallized as the resin film 2 is used, heat resistance and impact resistance can be imparted by coating.
本発明は、上記の実施の形態に限定されない。たとえば、上記の実施の形態では、支持具がロッド状をしていたが、円筒状をしていても構わないし、これらが複数本林立していても構わない。また、支持具を円筒状とする場合、外部から内部に貫通する通気孔を壁面に複数備えた構成とすることもできる。すなわち、通気孔によって真空が支持具内部を介しても行われる。されに、支持具の大きさは、孔の内壁面に接することがなければ特に限定されない。
また、上記の実施の形態では、樹脂フィルムの成形品と接する面に接着層が設けられていたが、熱による圧着のみで接着するようにしても構わない。
The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the support has a rod shape, but it may have a cylindrical shape, or a plurality of these may stand. Moreover, when making a support tool cylindrical, it can also be set as the structure provided with two or more ventilation holes which penetrate the inside from the outside. That is, the vacuum is also performed through the inside of the support by the vent hole. In addition, the size of the support is not particularly limited as long as it does not contact the inner wall surface of the hole.
In the above-described embodiment, the adhesive layer is provided on the surface in contact with the molded product of the resin film. However, the adhesive layer may be bonded only by heat pressure bonding.
上記の実施の形態では、支持具の上面が真空箱の天板の上面より低い位置になっており、紙製コップの下端部が真空箱内に入り込んでいたが、支持具の上面の高さを天板の上面と同じか少し高い高さにしてもよい。このようにすれば、成形品の底まで被覆が可能となる。
上記の実施の形態では、真空箱の天板に１つしか孔が設けられていなかったが、複数設けて同時に複数個の成形品を被覆できるようにしても構わない。
In the above embodiment, the upper surface of the support tool is lower than the upper surface of the top plate of the vacuum box, and the lower end of the paper cup has entered the vacuum box. May be the same as or slightly higher than the top surface of the top board. In this way, it is possible to cover the bottom of the molded product.
In the above embodiment, only one hole is provided in the top plate of the vacuum box, but a plurality of holes may be provided so that a plurality of molded products can be covered at the same time.
真空成型機の厚さ２ｍｍの鉄板製の天板に直径１２５ｍｍの孔を開け、この孔の縁に接しないように直径１０５ｍｍの支持具としてのロッドをその上面が真空箱の上面と同じ高さになるように真空箱にセットした。
このロッドの上に上口径１３４ｍｍ×下口径１２５ｍｍ×高さ４０ｍｍの成形品としての紙製コップを載せた。
Open a 125mm diameter hole in a 2mm thick iron plate top of the vacuum forming machine, and make the upper surface of the rod as a support tool with a diameter of 105mm the same height as the upper surface of the vacuum box so as not to touch the edge of this hole Was set in a vacuum box.
On this rod, a paper cup as a molded product having an upper diameter of 134 mm, a lower diameter of 125 mm, and a height of 40 mm was placed.
厚さ２５０μｍの実質的未延伸のポリエステルフィルム（東洋紡績社製Ａ−ＰＥＴ）を真空箱上部の寸法に合わせた支持枠に固定して１１０℃に加熱した後、紙製コップの上部から被せるように降し、支持枠を真空箱上部に接しさせると同時に真空を作動させた。 A substantially unstretched polyester film (A-PET manufactured by Toyobo Co., Ltd.) having a thickness of 250 μm is fixed to a support frame that matches the dimensions of the upper part of the vacuum box, heated to 110 ° C., and then covered from the upper part of the paper cup. Then, the support frame was brought into contact with the upper part of the vacuum box, and at the same time, the vacuum was activated.
８秒後に真空を停止させ、紙製コップの内壁面全体、外側面全体更に外底部の一部がポリエステルフィルムによって被覆された被覆成形品を得た。
直径１０５ｍｍのロッドに絡まった余分のポリエステルフィルムを刃物で除去した。
こうして得られた被覆成形品に水を入れたところ良好な耐水性が得られた。
After 8 seconds, the vacuum was stopped to obtain a coated molded product in which the entire inner wall surface, the entire outer surface, and a part of the outer bottom portion of the paper cup were covered with a polyester film.
Excess polyester film entangled in a 105 mm diameter rod was removed with a blade.
When water was added to the coated molded article thus obtained, good water resistance was obtained.
真空成型機の厚さ２ｍｍの鉄板製の天板に長径２２５ｍｍ×短径１５０ｍｍの楕円孔を開け、直径１０５ｍｍの支持具としてのロッドをその上面が真空箱の上面より５ｍｍ高くなるとともに、楕円孔の縁に接しないようにように真空箱の楕円孔を臨む位置にセットした。つぎに、成形品として上辺周辺に幅８ｍｍのフランジ部を持つ長径２１０ｍｍ×短径１３５ｍｍ×深さ２５ｍｍの小判型パルプモールド製容器をロッドの上に載せたのち、前記小判型パルプモールド製容器に接する面に、耐熱インクで青色の波目模様を印刷した上からポリオレフィン系接着性樹脂をラミネートさせた、結晶核剤を添加することにより結晶化された結晶化ポリエチレンテレフタレート（東洋紡績社製Ｃ−ＰＥＴ）からなる厚さ３０μｍの樹脂フィルムを真空成型機の支持枠にセットした。 Open an elliptical hole with a major axis of 225 mm × minor axis of 150 mm on a 2 mm thick iron plate top of a vacuum forming machine, and the upper surface of the rod as a support tool with a diameter of 105 mm is 5 mm higher than the upper surface of the vacuum box. The vacuum box was set at a position facing the elliptical hole so as not to touch the edge. Next, after placing an oval pulp mold container having a long diameter of 210 mm, a short diameter of 135 mm, and a depth of 25 mm on the rod as a molded product, the flange having an 8 mm width around the upper side is placed on the oval pulp mold container. Crystallized polyethylene terephthalate crystallized by adding a crystal nucleating agent obtained by printing a blue wave pattern with heat-resistant ink on the contact surface and laminating a polyolefin adhesive resin (C-made by Toyobo Co., Ltd.) A resin film having a thickness of 30 μm made of PET was set on a support frame of a vacuum molding machine.
この樹脂フィルムを１３０℃に予熱した後、前記小判型パルプモールド製容器に上部から被せるように降し、支持枠を真空箱上部に接しさせると同時に真空を作動させた状態で、樹脂フィルムをさらに１８０℃に成るように加熱し、１１秒後に真空成型機から樹脂フィルムによって被覆された小判型パルプモールド製容器を取り出した。
そして、樹脂フィルムの小判型パルプモールド製容器に付着していない部分を刃物で除去して被覆成形品としての被覆容器を得た。
After preheating the resin film to 130 ° C., the resin film is lowered so as to cover the oval pulp mold container from above, and the resin film is further removed while the support frame is in contact with the vacuum box and at the same time the vacuum is activated. The container was heated to 180 ° C., and an oval pulp mold container covered with a resin film was taken out from the vacuum molding machine after 11 seconds.
And the part which is not adhering to the oval-type pulp mold container of a resin film was removed with the blade, and the coating container as a coating molded product was obtained.
得られた被覆容器は、容器内底部、容器内側部、フランジ上部／下部が樹脂フィルムからなる被膜によって被覆されていて、フィルム内側に印刷された青色の波目模様がフィルムを透かして見えた。 In the obtained coated container, the inner bottom part of the container, the inner part of the container, and the upper / lower part of the flange were covered with a film made of a resin film, and a blue wavy pattern printed on the inner side of the film was seen through the film.
また、得られた被覆容器の耐熱性試験をした結果、２２０℃まで変形が無かった。また、熱水を入れても水がパルプモールド側に染み出すことも無かった。
そして、フランジ部の裏面までフィムルで覆われているので清潔感があった。
Moreover, as a result of the heat resistance test of the obtained coated container, there was no deformation up to 220 ° C. Moreover, even if hot water was added, the water did not ooze out to the pulp mold side.
And since the back of the flange part was covered with the film, there was a feeling of cleanliness.
１ 真空箱
１１ 天板
１２ 孔
２ 樹脂フィルム
３ 支持枠
４ 真空成形機
５ 支持具
６ 紙製コップ（成形品）
６１ 底
６２ 内壁面
６３ 外壁面
Ｓ 隙間
DESCRIPTION OF SYMBOLS 1 Vacuum box 11 Top plate 12 Hole 2 Resin film 3 Support frame 4 Vacuum forming machine 5 Support tool 6 Paper cup (molded product)
61 Bottom 62 Inner wall surface 63 Outer wall surface S Clearance
Claims (2)
The bottomed box type or the bottomed cylinder type molded product is exposed so that the upper end of the molded product is exposed to the outside from the upper surface of the vacuum box top plate at least from the hole provided on the top plate of the vacuum box. After being supported by the disposed support tool from below and with a gap formed between the inner peripheral surface of the hole and the support tool and the molded product, the molded product and the upper surface of the vacuum box are softened. The manufacturing method of the covering molded product provided with the process of making the inside of a vacuum box into a negative pressure in the state airtightly covered with the resin film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003390400A JP2005153146A (en) | 2003-11-20 | 2003-11-20 | Coated molded product and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003390400A JP2005153146A (en) | 2003-11-20 | 2003-11-20 | Coated molded product and its manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2005153146A true JP2005153146A (en) | 2005-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101134105B1 (en) | 2009-12-07 | 2012-04-06 | 주식회사 명보 | Container with plastic wrap attaching edge made of pulp and wrap attaching position forming apparatus for the same |
| CN104786476A (en) * | 2014-01-22 | 2015-07-22 | 丰田自动车株式会社 | Method and apparatus for manufacturing composite material |
-
2003
- 2003-11-20 JP JP2003390400A patent/JP2005153146A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101134105B1 (en) | 2009-12-07 | 2012-04-06 | 주식회사 명보 | Container with plastic wrap attaching edge made of pulp and wrap attaching position forming apparatus for the same |
| CN104786476A (en) * | 2014-01-22 | 2015-07-22 | 丰田自动车株式会社 | Method and apparatus for manufacturing composite material |
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