JP2005170510A - Moisture-proof packaging method for acrylic resin plate - Google Patents

Moisture-proof packaging method for acrylic resin plate Download PDF

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JP2005170510A
JP2005170510A JP2004297462A JP2004297462A JP2005170510A JP 2005170510 A JP2005170510 A JP 2005170510A JP 2004297462 A JP2004297462 A JP 2004297462A JP 2004297462 A JP2004297462 A JP 2004297462A JP 2005170510 A JP2005170510 A JP 2005170510A
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moisture
acrylic resin
film
packaging method
synthetic resin
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JP4500144B2 (en
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Junichiro Shin
純一郎 新
Hiroyuki Watanabe
博之 渡辺
Kenichi Kosawa
健一 莎澤
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Mitsubishi Rayon Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To restrain variations in time passage, such as warpage occurred in an acrylic resin plate using a simple method. <P>SOLUTION: A moisture-proof packaging method for the acrylic resin plate, wherein two or more acrylic resin plates 1 are piled and wrapped with a synthetic resin film 3 (film consisting of a polypropylene type or a polyethylene type material or the like), is provided. The moisture-vapor transmission of the synthetic resin film 3 is preferably 2.5 g/m<SP>2</SP>24h or lower. When a moisture-proof protective sheet 2 is place on the top and under the bottom of the piled acrylic resin plates 1, the moisture-vapor transmission of the moisture-proof protective sheet 2 is preferably 2.0 g/m<SP>2</SP>24h or lower. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、長期間保管した場合であっても反り等の問題が生じないように、アクリル系樹脂板を防湿包装する方法に関する。   The present invention relates to a method for moisture-proof packaging of an acrylic resin plate so that problems such as warping do not occur even when stored for a long period of time.

アクリル系樹脂板は、その優れた光学特性により、レンズ、自動車部品、照明部品、各種電子ディスプレイ等に使用されている。また近年、液晶ディスプレイのような表示装置の導光板としても用いられるようになり、その需要は急激に増している。   Acrylic resin plates are used in lenses, automobile parts, lighting parts, various electronic displays and the like because of their excellent optical properties. In recent years, it has also been used as a light guide plate for a display device such as a liquid crystal display, and its demand is rapidly increasing.

このアクリル系樹脂板は、例えば、メタクリル酸メチル単独重合体とメタクリル酸メチルとからなる組成物に、多官能(メタ)アクリレートを添加して鋳込重合する方法(特許文献1等参照)、また例えば、ベルト式連続製板装置を用い、その上下の金属製エンドレスベルトに挟まれた空間に原料を供給し、エンドレスベルトで搬送すると同時に加熱して樹脂原料を重合する連続キャスト法(特許文献2等参照)などにより製造できる。また、スクリュー押出機等で加熱溶融したアクリル系ポリマーを押出機先端のダイからシート状に広げて押出し、ロールなどの間で冷却・固化させて樹脂板を得る押出法などでも製造できる(非特許文献1等参照)。   This acrylic resin plate is, for example, a method in which a polyfunctional (meth) acrylate is added to a composition comprising a methyl methacrylate homopolymer and methyl methacrylate and cast polymerization is performed (see Patent Document 1, etc.), or For example, a continuous casting method in which a raw material is supplied to a space sandwiched between upper and lower metal endless belts using a belt-type continuous plate-making apparatus, and transported by the endless belt and simultaneously heated to polymerize a resin raw material (Patent Document 2). Etc.). It can also be manufactured by an extrusion method in which an acrylic polymer heated and melted by a screw extruder or the like is spread out from a die at the tip of the extruder into a sheet shape, extruded and cooled and solidified between rolls to obtain a resin plate (non-patented) Reference 1 etc.).

このように製造したアクリル系樹脂板は、製品として輸送され、所望の期間保管される。ここで保管等において長時間経過すると、吸湿することによって樹脂板の形状に反り等の経時変化が生じる場合がある。アクリル系樹脂板に形状の変化が生じてしまうと、製品価値が低下するばかりでなく、各種用途のうち特に精度が要求される用途においては、製品上大きな問題となる。
特公平4−75241号公報 特開昭52−94362号公報 浅見高著「プラスチック材料講座12 アクリル樹脂」日刊工業新聞社出版、昭和45年、p30−31
The acrylic resin plate thus produced is transported as a product and stored for a desired period. Here, when a long time elapses in storage or the like, the shape of the resin plate may change with time such as warping due to moisture absorption. If the shape of the acrylic resin plate changes, not only the product value is lowered, but also a great product problem in applications that require particularly high accuracy among various applications.
Japanese Patent Publication No. 4-75241 JP-A-52-94362 Takashi Asami “Plastic Materials Course 12 Acrylic Resin” published by Nikkan Kogyo Shimbun, 1970, p30-31

本発明は、上述した従来技術における課題を解決する為になされたものである。すなわち、本発明の目的は、アクリル系樹脂板に生じる反り等の経時変化の問題を、簡易な方法により抑制することにある。   The present invention has been made to solve the above-described problems in the prior art. That is, an object of the present invention is to suppress a problem of change with time such as warpage generated in an acrylic resin plate by a simple method.

本発明は、複数のアクリル系樹脂板を積載し、合成樹脂フィルムで包むアクリル系樹脂板の防湿包装方法である。   The present invention is a moisture-proof packaging method for an acrylic resin plate in which a plurality of acrylic resin plates are loaded and wrapped with a synthetic resin film.

本発明によれば、アクリル系樹脂板に防湿効果を奏し、その結果樹脂板の反り等の経時変化の問題を防止することが可能となる。   ADVANTAGE OF THE INVENTION According to this invention, there exists a moisture-proof effect in an acrylic resin board, As a result, it becomes possible to prevent the problem of temporal change, such as curvature of a resin board.

図1は、本発明の一実施形態を示す模式的断面図である。図1に示すように、複数のアクリル系樹脂板1を積載し、これを合成樹脂フィルム3で包むことにより、防湿効果が得られる。合成樹脂フィルム3での包み方は特に限定されず、防湿効果が得られるような全体的な包装であればよい。例えば、キャラメル包装などで構わない。合成樹脂フィルム3で包装する際のフィルム重ね部は、テープを貼って閉じることにより密閉包装することが好ましい。ここで用いるテープは一般に市販されているテープを使用することができる。粘着面が天然ゴム系接着剤であるものが好適である。   FIG. 1 is a schematic cross-sectional view showing an embodiment of the present invention. As shown in FIG. 1, a plurality of acrylic resin plates 1 are stacked and wrapped with a synthetic resin film 3 to obtain a moisture-proof effect. The method of wrapping with the synthetic resin film 3 is not particularly limited as long as it is an overall packaging that provides a moisture-proof effect. For example, caramel packaging may be used. It is preferable that the film overlap portion when packaging with the synthetic resin film 3 is hermetically packaged by closing with tape. As the tape used here, a commercially available tape can be used. The adhesive surface is preferably a natural rubber adhesive.

合成樹脂フィルム3としては、従来より知られる各種のフィルムを使用できる。特にアクリル系樹脂板の反りを防止する等の点から、好適な防湿性を有するフィルムを使用することが好ましい。具体的には、合成樹脂フィルム3の透湿度は、使用する厚みで2.5g/m2・24h以下が好ましく、2.3g/m2・24h以下がより好ましく、2.0g/m2・24h以下が特に好ましい。この透湿度は、JIS Z0208 条件B(温度40±0.5℃、相対湿度90±2%)に準じて測定した値である。 As the synthetic resin film 3, various conventionally known films can be used. In particular, from the viewpoint of preventing warping of the acrylic resin plate, it is preferable to use a film having suitable moisture resistance. Specifically, the moisture permeability of the synthetic resin film 3 is preferably 2.5 g / m 2 · 24 h or less, more preferably 2.3 g / m 2 · 24 h or less in terms of the thickness to be used, and 2.0 g / m 2 · 24 h or less is particularly preferable. This moisture permeability is a value measured according to JIS Z0208 Condition B (temperature 40 ± 0.5 ° C., relative humidity 90 ± 2%).

合成樹脂フィルム3としては、例えば、ポリプロピレン(PP)、ポリエチレン(PE)等のポリオレフィン系素材からなるフィルムを用いることが好ましい。なかでも、直鎖状低密度ポリエチレン(L−LDPE)フィルムが特に好ましい。合成樹脂フィルム3の厚みは、160μm以上が好ましく、175μm以上がより好ましく、190μm以上が特に好ましい。   As the synthetic resin film 3, for example, a film made of a polyolefin-based material such as polypropylene (PP) or polyethylene (PE) is preferably used. Among these, a linear low density polyethylene (L-LDPE) film is particularly preferable. The thickness of the synthetic resin film 3 is preferably 160 μm or more, more preferably 175 μm or more, and particularly preferably 190 μm or more.

合成樹脂フィルム3としては、金属膜を有するものが更に好ましい。この金属膜は、例えばアルミニウム、アルミナ等の所望の金属材料を基材上に蒸着してなる蒸着膜であることが好ましい。金属膜の厚みは特に規定されないが、蒸着膜であれば0.1nmから10nmが好ましく、アルミ箔のような金属箔であれば50μmから150μmが好ましい。   As the synthetic resin film 3, one having a metal film is more preferable. This metal film is preferably a deposited film formed by depositing a desired metal material such as aluminum or alumina on a substrate. The thickness of the metal film is not particularly limited, but is preferably 0.1 nm to 10 nm for a deposited film, and preferably 50 μm to 150 μm for a metal foil such as an aluminum foil.

金属膜を有する合成樹脂フィルムの基材には、前述のポリプロピレン(PP)、ポリエチレン(PE)等のポリオレフィン系素材や、ポリエチレンテレフタレート(PET)、ナイロン(NY)系素材などが好適に使用できる。具体的には、金属膜を有する合成樹脂フィルムとしては、例えばポリエチレンテレフタレート基材にアルミニウム蒸着した合成樹脂フィルム、ポリエチレンテレフタレート基材にアルミナ蒸着したフィルムとナイロン基材にアルミナ蒸着したフィルムとをラミネートした合成樹脂フィルム等が挙げられる。金属膜を有する合成樹脂フィルム3の透湿度は、使用する厚みで1.5g/m2・24h以下が好ましく、1.3g/m2・24h以下がより好ましく、1.1g/m2・24h以下が特に好ましい。また金属膜を有する合成樹脂フィルムの厚みは30μm以上が好ましい。 For the base material of the synthetic resin film having a metal film, polyolefin materials such as the above-mentioned polypropylene (PP) and polyethylene (PE), polyethylene terephthalate (PET), nylon (NY) materials and the like can be suitably used. Specifically, as a synthetic resin film having a metal film, for example, a synthetic resin film obtained by vapor-depositing aluminum on a polyethylene terephthalate substrate, a film obtained by vapor-depositing alumina on a polyethylene terephthalate substrate, and a film obtained by vapor-depositing alumina on a nylon substrate are laminated. Examples include synthetic resin films. Moisture permeability of the synthetic resin film 3 having a metal film is preferably not more than 1.5g / m 2 · 24h with a thickness to be used, more preferably not more than 1.3g / m 2 · 24h, 1.1g / m 2 · 24h The following are particularly preferred: Further, the thickness of the synthetic resin film having a metal film is preferably 30 μm or more.

図1においては、積載したアクリル系樹脂板1の最上面と最下面とに、段ボール等からなる保護シート2を置き、その端部を内側に折り曲げた状態で、合成樹脂フィルム3で包んである。この保護シート2により、包装時あるいは運搬輸送時の合成樹脂フィルム3の損傷やアクリル系樹脂板1の損傷を防止できる。さらに、保護シート2として防湿性を有するもの(防湿保護シート)を用いれば、防湿効果をより向上できる。この場合、防湿保護シートの透湿度は、2.0g/m2・24h以下が好ましく、1.5g/m2・24h以下がより好ましく、1.0g/m2・24h以下が特に好ましい。この防湿保護シート2の透湿度は、合成樹脂フィルム3の場合と同様にJIS Z0208 条件Bに準じて測定した値である。 In FIG. 1, a protective sheet 2 made of corrugated cardboard or the like is placed on the uppermost surface and the lowermost surface of a loaded acrylic resin plate 1, and the end portion thereof is folded inward and wrapped with a synthetic resin film 3. . This protective sheet 2 can prevent damage to the synthetic resin film 3 and damage to the acrylic resin plate 1 during packaging or transportation. Further, if a protective sheet 2 having moisture resistance (moisture-proof protective sheet) is used, the moisture-proof effect can be further improved. In this case, the moisture permeability of the moisture-proof protective sheet is preferably less 2.0g / m 2 · 24h, 1.5g / m or less, more preferably 2 · 24h, 1.0g / m 2 · 24h or less is particularly preferred. The moisture permeability of the moisture-proof protective sheet 2 is a value measured according to JIS Z0208 Condition B as in the case of the synthetic resin film 3.

防湿保護シート2は、金属膜を有するものであることが好ましい。この金属膜は、例えば、アルミニウム等の所望の金属材料を基材上に蒸着してなる蒸着膜であることが好ましい。具体的には、上述の蒸着等により形成した金属膜を有するフィルムと、所望の合成樹脂シートや紙とをラミネートしてなる防湿保護シート2が有用である。この場合、金属膜を有するフィルムの基材としては、例えば、ポリエチレンテレフタレート(PET)フィルム等を好適に使用できる。また、合成樹脂シートとしては、例えば、ポリプロピレン(PP)、ポリエチレン(PE)等のポリオレフィン系素材からなるシートを好適に使用でき、特に発泡ポリプロピレンシート、発泡ポリエチレンシートが好ましい。また、クラフト紙やライナー紙等も使用できる。   It is preferable that the moisture-proof protective sheet 2 has a metal film. This metal film is preferably a deposited film formed by depositing a desired metal material such as aluminum on a substrate. Specifically, a moisture-proof protective sheet 2 formed by laminating a film having a metal film formed by the above-described deposition or the like and a desired synthetic resin sheet or paper is useful. In this case, for example, a polyethylene terephthalate (PET) film or the like can be suitably used as the substrate of the film having a metal film. Moreover, as a synthetic resin sheet, the sheet | seat which consists of polyolefin materials, such as a polypropylene (PP) and polyethylene (PE), can be used conveniently, for example, a foamed polypropylene sheet and a foamed polyethylene sheet are preferable. Kraft paper or liner paper can also be used.

図1においては、アクリル系樹脂板1を合成樹脂フィルム3で包んだ包装体の上下面に段ボール4が配置されている。このようにして段ボール4を用いれば、搬送時のアクリル系樹脂板1の損傷を簡易に防止できる。また、この包装体はパレット5の上に載置されており、搬送等の便宜も図られている。パレット5の種類は特に制限されず、木製パレット、樹脂製パレット、紙製パレット等、従来より知られる各種のものが使用可能である。   In FIG. 1, cardboards 4 are arranged on the upper and lower surfaces of a package in which an acrylic resin plate 1 is wrapped with a synthetic resin film 3. If the cardboard 4 is used in this way, damage to the acrylic resin plate 1 during transportation can be easily prevented. In addition, the package is placed on the pallet 5 for convenience such as transportation. The type of the pallet 5 is not particularly limited, and various conventionally known types such as a wooden pallet, a resin pallet, and a paper pallet can be used.

さらに本発明においては、単数または複数の乾燥剤を、積載したアクリル系樹脂板1の側部や上部など所望の位置に配置して、その状態で合成樹脂フィルム3でアクリル系樹脂板1と乾燥剤とを一緒に包むことが、防湿効果の点でさらに好ましい。乾燥剤の種類は、特に限定されない。例えば、シリカゲル系、塩化マグネシウム系(市販品として、ニッソー樹脂(株)製ニッソードライMシリーズ、(株)オゾ化学研究所製オゾZシリーズ等)、塩化カルシウム系(市販品として、ニッソー樹脂(株)製ニッソードライCXシリーズ)等の乾燥剤が挙げられる。   Further, in the present invention, one or a plurality of desiccants are disposed at desired positions such as the side or upper portion of the loaded acrylic resin plate 1 and the acrylic resin plate 1 is dried with the synthetic resin film 3 in that state. It is more preferable to wrap the agent together in terms of the moisture-proof effect. The kind of desiccant is not particularly limited. For example, silica gel-based, magnesium chloride-based (commercially available products are Nisso Resin Co., Ltd., Nisso Dry M Series, Ozo Chemical Laboratory Co., Ltd. Ozo-Z Series), calcium chloride-based (commercially available products are ) Nisso Dry CX Series) and the like.

アクリル系樹脂板1の具体的な材質は、特に限定されない。例えば、メタクリル酸メチルを主原料して得たアクリル系樹脂板に対して本発明を好適に用いることができる。このようなアクリル系樹脂板は、代表的には、メタクリル酸メチル単独、もしくはメタクリル酸メチルと共重合可能な他の単量体との混合物を重合させる方法、あるいは、メタクリル酸メチル系重合体をメタクリル酸メチルまたはその混合物に溶解させたシラップや、メタクリル酸メチルまたはその混合物の一部を予め重合したシラップを原料として用いてこれを重合させる方法、などにより得られる。   The specific material of the acrylic resin plate 1 is not particularly limited. For example, the present invention can be suitably used for an acrylic resin plate obtained using methyl methacrylate as a main raw material. Such acrylic resin plates typically include a method of polymerizing methyl methacrylate alone or a mixture of other monomers copolymerizable with methyl methacrylate, or a methyl methacrylate polymer. It can be obtained by syrup dissolved in methyl methacrylate or a mixture thereof, or a method of polymerizing syrup obtained by polymerizing a part of methyl methacrylate or a mixture thereof as a raw material.

アクリル系樹脂板1は、例えば、白熱灯カバー、ハロゲンランプカバー等の発熱光源の周辺材料;衣類乾燥機、電子レンジ、オーブン等の加熱家電機器の部品;眼鏡レンズ、サングラスレンズ、カメラ用レンズ、ビデオカメラ用レンズ、ゴーグル用レンズ、コンタクトレンズ等の光学レンズ;メーターカバー等の車載部品、車載用のオーディオ機器部品、車載用のディスプレイ装置部品、車載用ナビゲーションシステム部品等の車載材料に、さらには、プラズマディスプレイ装置、液晶ディスプレイ装置、プロジェクション式ディスプレイ装置等の各種ディスプレイ装置の前面板、液晶ディスプレイの導光板等の各種ディスプレイ部材に用いることができる。   Acrylic resin plate 1 includes, for example, peripheral materials for heat-generating light sources such as incandescent lamp covers and halogen lamp covers; parts of heating household appliances such as clothes dryers, microwave ovens, ovens; spectacle lenses, sunglasses lenses, camera lenses, Optical lenses such as video camera lenses, goggles lenses, contact lenses; automotive parts such as meter covers; automotive audio equipment parts; automotive display device parts; automotive navigation system parts; Further, it can be used for various display members such as a front plate of various display devices such as a plasma display device, a liquid crystal display device, and a projection display device, and a light guide plate of a liquid crystal display.

<実施例1>
以下の工程に従い、アクリル系樹脂板の防湿包装(図1)を具体的に実施した。
<Example 1>
According to the following process, the moisture-proof packaging (FIG. 1) of the acrylic resin board was concretely implemented.

1)縦1400mm、横1400mm、高さ120mmの木製パレット5の上に、厚さ5mmの段ボール4を敷いた。   1) A cardboard 4 having a thickness of 5 mm was laid on a wooden pallet 5 having a length of 1400 mm, a width of 1400 mm, and a height of 120 mm.

2)さらにその上に、合成樹脂フィルム3として、縦2300mm、横3600mm、厚さ200μmの直鎖状低密度ポリエチレン(L−LDPE)フィルム(JIS Z0208 条件Bに準じて測定した透湿度が1.9g/m2・24h;以下に記載の透湿度もすべて同一条件にて測定した)を敷いた。 2) Furthermore, as a synthetic resin film 3, a linear low density polyethylene (L-LDPE) film having a length of 2300 mm, a width of 3600 mm, and a thickness of 200 μm (moisture permeability measured according to JIS Z0208 Condition B is 1. 9 g / m 2 · 24 h; the moisture permeability described below was also measured under the same conditions).

3)さらにその上に、保護シート2として、縦1400mm、横1400mmの防湿保護シートを敷いた。この防湿保護シートは、アルミ蒸着ポリエチレンテレフタレート(PET)フィルムと、2mm厚の発泡ポリエチレン(PE)シートをラミネートした防湿性能を有するシート(アルミ蒸着(2.0nm)PET12μm/PE15μm/発泡PE2mm、透湿度0.5g/m2・24h)である。 3) Furthermore, a moisture-proof protective sheet having a length of 1400 mm and a width of 1400 mm was laid thereon as the protective sheet 2. This moisture-proof protective sheet has a moisture-proof performance obtained by laminating an aluminum-deposited polyethylene terephthalate (PET) film and a 2 mm-thick foamed polyethylene (PE) sheet (aluminum-deposited (2.0 nm) PET 12 μm / PE 15 μm / foamed PE 2 mm, moisture permeability 0.5 g / m 2 · 24 h).

4)さらにその上に、アクリル系樹脂板1として、縦1380mm、横1200mm、厚さ8mmのアクリル系樹脂板[三菱レイヨン(株)製、商品名アクリライトL#001]を56枚、真直ぐ積み重ねた。なお、このアクリル系樹脂板は、厚さ90μmの保護フィルム(東レ合成フイルム(株)製、商品名トレテック7131)が両面に貼られているものを用いた。   4) Furthermore, 56 sheets of acrylic resin plates (product name: Acrylite L # 001, manufactured by Mitsubishi Rayon Co., Ltd.) having a length of 1380 mm, a width of 1200 mm, and a thickness of 8 mm are directly stacked as the acrylic resin plate 1. It was. The acrylic resin plate used was a 90 μm thick protective film (manufactured by Toray Synthetic Film Co., Ltd., trade name: Tretec 7131) attached to both sides.

5)さらにその上に、上記と同じ保護シート2(防湿保護シート)を敷いた。   5) Further, the same protective sheet 2 (moisture-proof protective sheet) as above was laid thereon.

6)次に、乾燥剤[ニッソー樹脂(株)製、商品名ニッソードライM(100g入り)]を、積載したアクリル系樹脂板1の側部に合計4個配置した。   6) Next, a total of four desiccants [manufactured by Nisso Resin Co., Ltd., trade name Nisso Dry M (with 100 g)] were placed on the side of the loaded acrylic resin plate 1.

7)次に、アクリル系樹脂板1の下にあらかじめ敷いておいた合成樹脂フィルム3によって、積み重ねたアクリル系樹脂板1、保護シート2および乾燥剤を含めて4側面および上面を包みながら折りたたんだ。このとき、上下の保護シート2は、アクリル系樹脂板1の面と接しない部分を内側に折り曲げることにより、積載したアクリル系樹脂板1の8つの角が合成樹脂フィルム3のポリエチレンフィルムに直接当たらないようにして、合成樹脂フィルム3が破れないようにした。   7) Next, the synthetic resin film 3 previously laid under the acrylic resin plate 1 was folded while wrapping the four side surfaces and the upper surface including the stacked acrylic resin plate 1, the protective sheet 2 and the desiccant. . At this time, when the upper and lower protective sheets 2 are bent inward at the portions not contacting the surface of the acrylic resin plate 1, the eight corners of the loaded acrylic resin plate 1 directly hit the polyethylene film of the synthetic resin film 3. The synthetic resin film 3 was prevented from being broken.

8)次に、合成樹脂フィルム3の包装後の重ね部は、テープ(ニチバン(株)製、商品名カートンテープ、梱包用No.660、幅50mm)にて閉じることにより、密閉包装した。   8) Next, the overlapped portion of the synthetic resin film 3 after packaging was hermetically packaged by closing with a tape (manufactured by Nichiban Co., Ltd., trade name carton tape, packaging No. 660, width 50 mm).

9)以上のようにして防湿包装した包装体を、鉄筋倉庫内に2003年7月1日から100日間保管、または200日保管したのち包装を開き、アクリル系樹脂板1の反り具合を評価した。保管期間中の倉庫内は、最初の100日間は平均温度30℃、平均相対湿度75%RHの雰囲気、後の100日間は平均温度12℃、平均相対湿度76%RHの雰囲気であった。この評価方法は、最も大きな反りが生じる積載アクリル系樹脂板の最上面と最下面との板を抜き取り、具体的には図2に示すように、アクリル系樹脂板の長辺方向、短辺方向に糸を張り、糸と樹脂板とに生じた隙間距離A、Bを測定することにより行った。評価結果は、最上面にあった樹脂板と最下面にあった樹脂板とにおける隙間距離A、Bのうち最も大きな数値とした。なお、包装体の内部には予め温湿度計(タバイエスペック(株)製、商品名サーモレコーダーRS−11)を同梱し、内部の相対湿度の経時変化も測定した。その評価結果を表1に示す。   9) The package body which has been moisture-proof packaged as described above is stored in a reinforcing steel warehouse for 100 days from July 1, 2003, or stored for 200 days, and then the package is opened, and the warping of the acrylic resin plate 1 is evaluated. . During the storage period, the first 100 days had an atmosphere with an average temperature of 30 ° C. and an average relative humidity of 75% RH, and the following 100 days had an atmosphere with an average temperature of 12 ° C. and an average relative humidity of 76% RH. In this evaluation method, the plates of the uppermost surface and the lowermost surface of the loaded acrylic resin plate where the greatest warpage occurs are extracted. Specifically, as shown in FIG. 2, the long side direction and the short side direction of the acrylic resin plate This was done by measuring the gap distances A and B formed between the yarn and the resin plate. The evaluation result was the largest numerical value among the gap distances A and B between the resin plate on the uppermost surface and the resin plate on the lowermost surface. Note that a temperature and humidity meter (trade name Thermo Recorder RS-11, manufactured by Tabai Espec Co., Ltd.) was included in the package in advance, and the internal humidity was also measured over time. The evaluation results are shown in Table 1.

<実施例2>
合成樹脂フィルム3として、直鎖状低密度ポリエチレン(L−LDPE)フィルムの代わりに、同サイズ、厚みの低密度ポリエチレン(LDPE)フィルム(透湿度2.3g/m2・24h)を使用し、かつ、防湿保護シート2として、ライナー紙にアルミ蒸着フィルムをラミネートしてなる防湿性能を有するシート(アルミ蒸着(2.0nm)PET12μm/PE20μm/Kライナー紙280g・m2/PE20μm、透湿度0.6g/m2・24h)を使用したこと以外は、実施例1と同様にして防湿包装を行い、実施例1の包装体と一緒に保管して評価した。結果を表1に示す。
<Example 2>
As the synthetic resin film 3, instead of a linear low density polyethylene (L-LDPE) film, a low density polyethylene (LDPE) film of the same size and thickness (water vapor transmission 2.3 g / m 2 · 24 h) is used. Further, as the moisture-proof protective sheet 2, a sheet having moisture-proof performance obtained by laminating an aluminum vapor-deposited film on liner paper (aluminum vapor-deposited (2.0 nm) PET 12 μm / PE 20 μm / K liner paper 280 g · m 2 / PE 20 μm, moisture permeability 0. Except that 6 g / m 2 · 24 h) was used, moisture-proof packaging was carried out in the same manner as in Example 1, and was stored together with the package of Example 1 for evaluation. The results are shown in Table 1.

<実施例3>
保護シート2として、防湿保護シートの代わりに木製パレット5の上に敷いたものと同じ段ボール(透湿度2000g/m2・24h)を使用したこと以外は実施例1と同様にして防湿包装を行い、実施例1の包装体と一緒に保管して評価した。結果を表1に示す。
<Example 3>
Perform moisture-proof packaging in the same manner as in Example 1 except that the same corrugated cardboard (moisture permeability of 2000 g / m 2 · 24 h) used on the wooden pallet 5 is used as the protective sheet 2 instead of the moisture-proof protective sheet. It was stored together with the package of Example 1 and evaluated. The results are shown in Table 1.

<実施例4>
合成樹脂フィルム3として、直鎖状低密度ポリエチレン(L−LDPE)フィルムの代わりに、同サイズの低密度ポリエチレン(LDPE)フィルムを使用し、かつ、保護シート2として、防湿保護シートの代わりに木製パレット5の上に敷いたものと同じ段ボールを使用したこと以外は、実施例1と同様にして防湿包装を行い、実施例1の包装体と一緒に保管して評価した。結果を表1に示す。
<Example 4>
As the synthetic resin film 3, a low-density polyethylene (LDPE) film of the same size is used instead of the linear low-density polyethylene (L-LDPE) film, and the protective sheet 2 is made of wood instead of the moisture-proof protective sheet. Except that the same corrugated cardboard as that laid on the pallet 5 was used, moisture-proof packaging was carried out in the same manner as in Example 1, and it was stored together with the package of Example 1 for evaluation. The results are shown in Table 1.

<実施例5>
合成樹脂フィルム3として、LDPE100μm/アルミ蒸着(0.8nm)PET12μmの構成の厚み112μmのフィルム(透湿度1.1g/m2・24h)を用いたこと以外は、実施例1と同様にして防湿包装を行い、実施例1の包装体と一緒に保管して評価した。結果を表2に示す。
<Example 5>
Moisture-proof as in Example 1 except that a film of 112 μm thickness (moisture permeability of 1.1 g / m 2 · 24 h) having a structure of LDPE of 100 μm / aluminum vapor deposition (0.8 nm) PET is used as the synthetic resin film 3. Packaging was performed, and the package was stored together with the package of Example 1 for evaluation. The results are shown in Table 2.

<実施例6>
合成樹脂フィルム3として、LLDPE20μm/LDPE20μm/アルミ蒸着(0.8nm)PET12μm/LDPE20μm/アルミ蒸着(0.8nm)PET12μmの構成の厚み84μmのフィルム(透湿度0.5g/m2・24h)を使用したこと以外は、実施例1と同様にして防湿包装を行い、実施例1の包装体と一緒に保管して評価した。結果を表2に示す。
<Example 6>
As the synthetic resin film 3, an LLDPE 20 μm / LDPE 20 μm / aluminum vapor deposition (0.8 nm) PET 12 μm / LDPE 20 μm / aluminum vapor deposition (0.8 nm) PET 12 μm thick 84 μm thick film (water vapor transmission rate 0.5 g / m 2 .24 h) is used. Except for the above, moisture-proof packaging was carried out in the same manner as in Example 1, and was stored together with the package of Example 1 for evaluation. The results are shown in Table 2.

<実施例7>
合成樹脂フィルム3として、LLDPE30μm/アルミナ蒸着(0.8nm)PET12μm/アルミナ蒸着(1.2nm)2軸遠心ナイロン15μm/LLDPE30μmの構成の厚み87μmのフィルム(透湿度0.5g/m2・24h)を使用したこと以外は、実施例1と同様にして防湿包装を行い、実施例1の包装体と一緒に保管して評価した。結果を表2に示す。
<Example 7>
As synthetic resin film 3, LLDPE 30 μm / alumina vapor deposition (0.8 nm) PET 12 μm / alumina vapor deposition (1.2 nm) biaxial centrifugal nylon 15 μm / LLDPE 30 μm thickness 87 μm film (moisture permeability 0.5 g / m 2 · 24 h) Except that was used, moisture-proof packaging was carried out in the same manner as in Example 1, and it was stored together with the package of Example 1 for evaluation. The results are shown in Table 2.

<実施例8>
合成樹脂フィルム3として、両面アルミナ蒸着(2.0nm)PET12μm/アルミナ蒸着(1.2nm)2軸遠心ナイロン15μm/LLDPE30μmの構成の厚み57μmのフィルム(透湿度1.0g/m2・24h)を使用したこと以外は、実施例1と同様にして防湿包装を行い、実施例1の包装体と一緒に保管して評価した。結果を表2に示す。
<Example 8>
As a synthetic resin film 3, a double-sided alumina vapor deposition (2.0 nm) PET 12 μm / alumina vapor deposition (1.2 nm) biaxial centrifugal nylon 15 μm / LLDPE 30 μm thick film (moisture permeability 1.0 g / m 2 · 24 h) Except that it was used, moisture-proof packaging was carried out in the same manner as in Example 1, and it was stored together with the package of Example 1 for evaluation. The results are shown in Table 2.

<比較例1>
防湿保護シート2と合成樹脂フィルム3とを使用せず、乾燥剤も配置しなかったこと以外は、実施例1と同様に行い、実施例1の包装体と一緒に保管して評価した。結果を表1に示す。なお、包装していないため、包装内相対湿度の代わりに保管期間中の雰囲気の平均相対湿度を記載した。
<Comparative Example 1>
It was carried out in the same manner as in Example 1 except that the moisture-proof protective sheet 2 and the synthetic resin film 3 were not used and the desiccant was not disposed, and the product was stored together with the package of Example 1 for evaluation. The results are shown in Table 1. In addition, since it was not packaged, the average relative humidity of the atmosphere during the storage period was described instead of the relative humidity in the package.

Figure 2005170510
Figure 2005170510

Figure 2005170510
Figure 2005170510

本発明の一実施形態を示す模式的断面図である。It is a typical sectional view showing one embodiment of the present invention. 実施例における反り評価の方法を説明する為の模式図である。It is a schematic diagram for demonstrating the method of curvature evaluation in an Example.

符号の説明Explanation of symbols

1 アクリル系樹脂板
2 防湿保護シート
3 合成樹脂フィルム
4 段ボール
5 木製パレット
DESCRIPTION OF SYMBOLS 1 Acrylic resin board 2 Moisture-proof protective sheet 3 Synthetic resin film 4 Corrugated cardboard 5 Wooden pallet

Claims (16)

複数のアクリル系樹脂板を積載し、合成樹脂フィルムで包むアクリル系樹脂板の防湿包装方法。   A moisture-proof packaging method for an acrylic resin plate, in which a plurality of acrylic resin plates are loaded and wrapped with a synthetic resin film. 合成樹脂フィルムの透湿度が、2.5g/m2・24h以下である請求項1記載のアクリル系樹脂板の防湿包装方法。 The moisture-proof packaging method for an acrylic resin plate according to claim 1, wherein the moisture permeability of the synthetic resin film is 2.5 g / m 2 · 24 h or less. 合成樹脂フィルムが、ポリオレフィン系素材からなる請求項2記載のアクリル系樹脂板の防湿包装方法。   The moisture-proof packaging method for an acrylic resin plate according to claim 2, wherein the synthetic resin film is made of a polyolefin-based material. 合成樹脂フィルムが、ポリプロピレン系あるいはポリエチレン系素材からなる請求項3記載のアクリル系樹脂板の防湿包装方法。   4. The moisture-proof packaging method for an acrylic resin plate according to claim 3, wherein the synthetic resin film is made of a polypropylene or polyethylene material. 合成樹脂フィルムが、直鎖状低密度ポリエチレンからなる請求項3記載のアクリル系樹脂板の防湿包装方法。   The moisture-proof packaging method for an acrylic resin plate according to claim 3, wherein the synthetic resin film is made of linear low-density polyethylene. 合成樹脂フィルムの厚みが、160μm以上である請求項1〜5の何れか一項記載のアクリル系樹脂板の防湿包装方法。   The moisture-proof packaging method for an acrylic resin plate according to any one of claims 1 to 5, wherein the synthetic resin film has a thickness of 160 µm or more. 合成樹脂フィルムが、金属膜を有する請求項1記載のアクリル系樹脂板の防湿包装方法。   The moisture-proof packaging method for an acrylic resin plate according to claim 1, wherein the synthetic resin film has a metal film. 複数のアクリル系樹脂板を積載し合成樹脂フィルムで包む際に、積載した樹脂板の最上面と最下面とに防湿保護シートを置いた状態で包む請求項1〜7の何れか一項記載のアクリル系樹脂板の防湿包装方法。   When a plurality of acrylic resin plates are loaded and wrapped with a synthetic resin film, the moisture-proof protective sheet is wrapped on the uppermost and lowermost surfaces of the loaded resin plates. A moisture-proof packaging method for acrylic resin plates. 防湿保護シートの透湿度が、2.0g/m2・24h以下である請求項8記載のアクリル系樹脂板の防湿包装方法。 The moisture-proof packaging method for acrylic resin plates according to claim 8, wherein the moisture-proof protective sheet has a moisture permeability of 2.0 g / m 2 · 24 h or less. 防湿保護シートが、金属膜を有する請求項8または9記載のアクリル系樹脂板の防湿包装方法。   The moisture-proof packaging method for an acrylic resin plate according to claim 8 or 9, wherein the moisture-proof protective sheet has a metal film. 金属膜が、金属蒸着膜である請求項10記載のアクリル系樹脂板の防湿包装方法。   The moisture-proof packaging method for an acrylic resin plate according to claim 10, wherein the metal film is a metal vapor-deposited film. 金属膜が、アルミ蒸着膜である請求項11記載のアクリル系樹脂板の防湿包装方法。   The moisture-proof packaging method for an acrylic resin plate according to claim 11, wherein the metal film is an aluminum vapor deposition film. 防湿保護シートが、金属膜を有するフィルムと合成樹脂シートとをラミネートしてなるものである請求項10〜12の何れか一項記載のアクリル系樹脂板の防湿包装方法。   The moisture-proof packaging method for an acrylic resin plate according to any one of claims 10 to 12, wherein the moisture-proof protective sheet is formed by laminating a film having a metal film and a synthetic resin sheet. 合成樹脂シートが、ポリプロピレン系あるいはポリエチレン系素材からなる請求項13記載のアクリル系樹脂板の防湿包装方法。   14. The moisture-proof packaging method for an acrylic resin plate according to claim 13, wherein the synthetic resin sheet is made of a polypropylene-based material or a polyethylene-based material. 合成樹脂シートが、発泡ポリプロピレンシートあるいは発泡ポリエチレンシートである請求項14記載のアクリル系樹脂板の防湿包装方法。   15. The moisture-proof packaging method for acrylic resin plates according to claim 14, wherein the synthetic resin sheet is a foamed polypropylene sheet or a foamed polyethylene sheet. 複数のアクリル系樹脂板を積載し合成樹脂フィルムで包む際に、乾燥剤も一緒に包装する請求項8記載のアクリル系樹脂板の防湿包装方法。   9. The moisture-proof packaging method for an acrylic resin plate according to claim 8, wherein when the plurality of acrylic resin plates are loaded and wrapped with a synthetic resin film, the desiccant is also packaged together.
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JP2011168312A (en) * 2010-02-19 2011-09-01 Sumitomo Chemical Co Ltd Method of packing resin plate and packed product
JP2012131570A (en) * 2010-12-01 2012-07-12 Aica Kogyo Co Ltd Packaging structure of lamination of fibered base material resin impregnated laminate plates, and packaging method for lamination of fibered base material resin impregnated laminate plates
JP2012140185A (en) * 2012-02-14 2012-07-26 Sumitomo Chemical Co Ltd Resin plate packaging method and package
JP2016078940A (en) * 2014-10-17 2016-05-16 旭硝子株式会社 Glass plate packing body
JP2016175695A (en) * 2015-03-23 2016-10-06 三菱樹脂株式会社 Film roll package for carrying
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JPH04132297A (en) * 1990-09-22 1992-05-06 Matsushita Electric Works Ltd Method of packaging laminated board
JPH11198902A (en) * 1998-01-09 1999-07-27 Nitto Jushi Kogyo Kk Packing method for plate material
JP2002200108A (en) * 2000-12-28 2002-07-16 Maikooru Kk Moistureproof packaging material, moistureproof outer bag for heating element using the same moistureproof packaging container such as moistureproof collective packaging bag for heating element or the like and heating element housed in them

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011168312A (en) * 2010-02-19 2011-09-01 Sumitomo Chemical Co Ltd Method of packing resin plate and packed product
JP2012131570A (en) * 2010-12-01 2012-07-12 Aica Kogyo Co Ltd Packaging structure of lamination of fibered base material resin impregnated laminate plates, and packaging method for lamination of fibered base material resin impregnated laminate plates
JP2012140185A (en) * 2012-02-14 2012-07-26 Sumitomo Chemical Co Ltd Resin plate packaging method and package
JP2016078940A (en) * 2014-10-17 2016-05-16 旭硝子株式会社 Glass plate packing body
JP2016175695A (en) * 2015-03-23 2016-10-06 三菱樹脂株式会社 Film roll package for carrying
WO2022123938A1 (en) * 2020-12-11 2022-06-16 株式会社カネカ Packing method and packed object

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