JP2014046975A - Packaging material for deep drawing molding - Google Patents

Packaging material for deep drawing molding Download PDF

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JP2014046975A
JP2014046975A JP2012192978A JP2012192978A JP2014046975A JP 2014046975 A JP2014046975 A JP 2014046975A JP 2012192978 A JP2012192978 A JP 2012192978A JP 2012192978 A JP2012192978 A JP 2012192978A JP 2014046975 A JP2014046975 A JP 2014046975A
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deep drawing
printing
packaging material
deep
polylactic acid
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JP6205691B2 (en
JP2014046975A5 (en
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Kentaro Muraki
健太郎 村木
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Toppan Inc
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Toppan Printing Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

Abstract

PROBLEM TO BE SOLVED: To provide a packaging material for deep drawing molding, capable of deep drawing molding so that a pattern and display can be printed on a bottom material for use in deep drawing packaging, even when using a conventional deep drawing molding machine, and having a good registration accuracy of the printing.SOLUTION: A polylactic acid film, an ink layer, an adhesive layer and a sealant layer are laminated sequentially, where the density of the polylactic acid film is 1.10-1.40×10kg/m, the tension elasticity in the TD direction is 115-145%, and the heat-shrink rate in the TD direction at 100°C is 0-1%.

Description

本発明は、深絞り成形用包装材料に関するものである。   The present invention relates to a packaging material for deep drawing.

深絞り包装は、真空、圧空、真空圧空成形などで深絞り成形され、くぼみを設けた底材のくぼみに被包装物を収納し、平らなシートやフィルムからなる蓋材でシール密封した包装である。   Deep-drawing packaging is a packaging that is deep-drawn by vacuum, compressed air, vacuum / pressure forming, etc., contains the package in a hollow in the bottom, and is sealed and sealed with a lid made of a flat sheet or film. is there.

深絞り包装では、スライスハムや、ソーセージなどの畜肉加工品やその他薄型の製品や部材の包装に用いられている。そして、平らな蓋材に印刷がなされ、深絞り成形された底材は、無印刷や無地で用いられ、あるいは着色樹脂が用いられていて、印刷の見当を考慮する必要がなかった。また、底材は無延伸ポリプロピレンや無延伸ナイロンが積層された真空、圧空、真空圧空成形性のよい積層フィルムが使用されてきた（例えば、特許文献１）。   Deep-drawing packaging is used for packaging sliced ham, processed meat products such as sausages, and other thin products and components. The bottom material printed on the flat lid material and deep-drawn is used without printing or with a solid color, or with a colored resin, so there is no need to consider printing registration. In addition, a laminated film having good vacuum, pressure, and vacuum / pressure forming properties in which unstretched polypropylene or unstretched nylon is laminated has been used as the bottom material (for example, Patent Document 1).

最近になって、店頭で底材が上になって展示されることがあり、底材にも表示印刷が要求されるようになると、底材と蓋材の印刷見当、底材の印刷と深絞り成形型との見当、底材の印刷とシール型との見当が問題となってきた。   Recently, there are cases where the flooring is displayed at the storefront. When display printing is also required for the flooring, printing registration of the flooring and the lid, printing of the flooring and the depth of the flooring are required. The registration with the drawing mold, the printing of the bottom material and the registration with the seal mold have become problems.

しかし、前述の深絞り成形性の良い無延伸ポリプロピレンなどを印刷基材とした深絞り成形用包装材料では、印刷ピッチ寸法安定性が悪く、底材として良好な印刷ピッチ寸法安定性を得ることができない。   However, the deep-drawing packaging material using the above-mentioned non-stretched polypropylene with good deep-drawing formability as a printing substrate has poor printing pitch dimensional stability and can obtain good printing pitch dimensional stability as a bottom material. Can not.

そこで、印刷ピッチ寸法安定性の良い１６μｍの２軸延伸ポリエチレンテレフタレートフィルムを印刷基材として採用すると、見当の問題は解決されるが、今度は深絞り成形性が悪くなり、浅絞りしか出来ないと言う二律背反的な問題があった。   Therefore, if a 16 μm biaxially stretched polyethylene terephthalate film with good printing pitch dimension stability is used as a printing substrate, the problem of registration is solved, but this time the deep drawability becomes worse and only shallow drawing is possible. There was a contradictory problem to say.

特開２００８−２３０１２１号公報JP 2008-230121 A

本発明は上記した事情に鑑みてなされたもので、従来の深絞り成形機を使用しても、深絞り成形が可能で、かつ、印刷の見当精度が良好な深絞り成形用包装材料を提供することを課題としている。   The present invention has been made in view of the above-described circumstances, and provides a deep drawing molding packaging material that is capable of deep drawing even when a conventional deep drawing machine is used and has good printing registration accuracy. The challenge is to do.

本発明の請求項１に係る発明は、ポリ乳酸フィルム、インキ層、接着層、シーラント層が順次積層され、前記ポリ乳酸フィルムの密度が１．１０〜１．４０×１０３ｋｇ／ｍ３、ＴＤ方向の引張伸度が１１５〜１４５％、１００℃でのＴＤ方向の熱収縮率が０〜１％であることを特徴とする深絞り成形用包装材料である。 In the invention according to claim 1 of the present invention, a polylactic acid film, an ink layer, an adhesive layer, and a sealant layer are sequentially laminated, and the density of the polylactic acid film is 1.10 to 1.40 × 10 3 kg / m 3 , A deep-drawing packaging material having a tensile elongation in the TD direction of 115 to 145% and a thermal shrinkage in the TD direction at 100 ° C. of 0 to 1%.

本発明の深絞り成形用包装材料は、従来の深絞り成形機を使用しても、深絞り成形が可能で、かつ、印刷の見当精度が良好である。これを用いることで、深絞り包装に用いる底材にも、絵柄や表示の印刷が出来るようになる。   The deep-drawing molding packaging material of the present invention can be deep-drawn even with the use of a conventional deep-drawing machine and has good printing registration accuracy. By using this, it is possible to print a picture or a display on a bottom material used for deep drawing packaging.

このため、底材側にも見当精度が良好な多色印刷が可能となり、印刷面積が広がったことから、商品のデザイン効果が高まり、商品のイメージアップ、店頭における訴求効果も良くなり、更に、情報提供の表示量を増やすことで、より的確な商品情報を消費者に提供が可能となる。   For this reason, multi-color printing with good registration accuracy is possible on the bottom material side, and the printing area has expanded, so the design effect of the product increases, the image of the product improves, the appeal effect at the store also improves, By increasing the amount of information provided, more accurate product information can be provided to consumers.

本発明の深絞り成形用包装材料の一例を模式的に断面で示した説明図である。It is explanatory drawing which showed typically an example of the deep drawing molding packaging material of this invention in the cross section. 本発明の深絞り成形用包装材料の他の例を模式的に断面で示した説明図である。It is explanatory drawing which showed typically the other example of the deep drawing packaging material of this invention in the cross section.

以下、本発明を実施するための形態につき説明する。
図１は、本発明の深絞り成形用包装材料の一例を模式的に断面で示した説明図、図２は、本発明の深絞り成形用包装材料の他の例を模式的に断面で示した説明図である。 Hereinafter, embodiments for carrying out the present invention will be described.
FIG. 1 is an explanatory diagram schematically showing an example of the deep drawing molding packaging material of the present invention in cross section, and FIG. 2 is a schematic sectional view showing another example of the deep drawing molding packaging material of the present invention. FIG.

本発明の一例の深絞り成形用包装材料は、図１の断面図のように、ポリ乳酸フィルム１、インキ層２、接着層３、シーラント層４がこの順で積層されている。また、本発明においては、図２の本発明の他の例の深絞り成形用包装材料のように、接着層３とシーラント層４間に、バリア層５と接着層６を更に設けてもよい。また、更に他の層を中間層として設けてもよい。   As shown in the cross-sectional view of FIG. 1, the deep drawing molding material of the present invention has a polylactic acid film 1, an ink layer 2, an adhesive layer 3, and a sealant layer 4 laminated in this order. Further, in the present invention, a barrier layer 5 and an adhesive layer 6 may be further provided between the adhesive layer 3 and the sealant layer 4 as in the deep drawing molding packaging material of another example of the present invention shown in FIG. . Further, another layer may be provided as an intermediate layer.

本発明の深絞り成形用包装材料に用いるポリ乳酸フィルム１には、その密度が１．１０〜１．４０×１０３ｋｇ／ｍ３、ＴＤ方向の引張伸度が１１５〜１４５％、１００℃でのＴＤ方向の熱収縮率が０〜１％であるポリ乳酸フィルムを用いる。 The polylactic acid film 1 used for the packaging material for deep drawing according to the present invention has a density of 1.10 to 1.40 × 10 3 kg / m 3 , a tensile elongation in the TD direction of 115 to 145%, 100 ° C. A polylactic acid film having a thermal shrinkage in the TD direction of 0 to 1% is used.

このようにすることによって、深絞り成形用包装材料にしたときに、従来の深絞り成形機を使用して、深絞り成形が可能で、かつ、印刷の見当精度が良好になる。そのため、底材側にも多色印刷が可能となり、印刷面積が広がり、商品情報の表示量を増やすことができ、より的確な商品情報を消費者に提供することが可能となる。   By doing so, when a packaging material for deep drawing is used, deep drawing can be performed using a conventional deep drawing molding machine, and the printing registration accuracy is improved. Therefore, multicolor printing can be performed on the bottom material side, the printing area is increased, the display amount of product information can be increased, and more accurate product information can be provided to consumers.

インキ層２を設ける印刷方式としては、グラビア印刷、フレキソ印刷、オフセット印刷、シルク印刷、活版印刷、あるいはインクジェット印刷など公知の印刷方式を単独であるいは組み合わせて用いることが出来る。安価に大量に印刷する場合には、グラビア印刷が好ましく用いられる。   As a printing method for providing the ink layer 2, a known printing method such as gravure printing, flexographic printing, offset printing, silk printing, letterpress printing, or ink jet printing can be used alone or in combination. Gravure printing is preferably used when printing a large amount at a low cost.

インキ層２に用いるインキには、グラビア印刷方式の場合、ウレタン系の１液または２液のインキが好ましく使用できる。このインキを用いて、ポリ乳酸フィルム１の裏面に印刷して、インキ層２を設けることができる。   In the case of the gravure printing method, urethane-based one-component or two-component ink can be preferably used as the ink used for the ink layer 2. The ink layer 2 can be provided by printing on the back surface of the polylactic acid film 1 using this ink.

接着層３には、ドライラミネート用の接着剤や、ノンソルベントタイプの接着剤が好ましく用いられる。これらの接着剤をポリ乳酸フィルム１に印刷されたインキ層３の面に塗布して、設けることができる。   For the adhesive layer 3, an adhesive for dry lamination or a non-solvent type adhesive is preferably used. These adhesives can be provided by applying to the surface of the ink layer 3 printed on the polylactic acid film 1.

また、サンドイッチラミネーションで、熱可塑性樹脂を溶融押出して接着層３を設けて、シーラント層４を積層しても良い。サンドイッチラミネーションの場合、ポリ乳酸フィルム１に印刷されたインキ層２の面にあらかじめ、アンカーコート材を塗布して、熱可塑性樹脂を溶融押出しすることが出来る。   Alternatively, the sealant layer 4 may be laminated by melt-extrusion of a thermoplastic resin to provide the adhesive layer 3 by sandwich lamination. In the case of sandwich lamination, an anchor coat material can be applied in advance to the surface of the ink layer 2 printed on the polylactic acid film 1, and the thermoplastic resin can be melt extruded.

また、接着層６も接着層３と同様に、ドライラミネート用の接着剤や、ノンソルベントタイプの接着剤が使用でき、また、サンドイッチラミネーションで、熱可塑性樹脂を溶融
押出して設けても良い。 Similarly to the adhesive layer 3, the adhesive layer 6 may be a dry laminate adhesive or a non-solvent adhesive, and may be provided by melt extrusion of a thermoplastic resin by sandwich lamination.

シーラント層４としては、熱可塑性樹脂が使用できる。特に、低密度ポリエチレンや直鎖状低密度ポリエチレンを好ましく使用することが出来る。これら熱可塑性樹脂のフィルムを用いても良いし、または、押出ラミネーションで、熱可塑性樹脂を溶融押出して設けても良い。   As the sealant layer 4, a thermoplastic resin can be used. In particular, low density polyethylene and linear low density polyethylene can be preferably used. These thermoplastic resin films may be used, or the thermoplastic resin may be melt-extruded by extrusion lamination.

バリア層５としては、６−ナイロン、６、６−ナイロン、ＭＸＤ６ナイロンなどのポリアミドや、エチレン−ビニルアルコール共重合体などのバリア性のある樹脂層が使用できる。   As the barrier layer 5, a polyamide resin such as 6-nylon, 6, 6-nylon, and MXD6 nylon, or a resin layer having a barrier property such as an ethylene-vinyl alcohol copolymer can be used.

以下に、本発明の具体的実施例について説明する。   Specific examples of the present invention will be described below.

＜実施例１＞
ポリ乳酸フィルム１として、ＪＩＳ Ｋ７１００の密度こうばい管法による密度１．２７×１０３ｋｇ／ｍ３、ＴＤ方向の引張伸度が１３０％、１００℃でのＴＤ方向の熱収縮率が０．５％のポリ乳酸フィルム（厚さ２０μｍ）を用意し、片面に２液硬化型ウレタン系インキを用いて縦横それぞれ１ｃｍ間隔の格子模様を印刷し、インキ層２を設けた。 <Example 1>
The polylactic acid film 1 has a density of 1.27 × 10 3 kg / m 3 according to JIS K7100 density tube method, a tensile elongation in the TD direction of 130%, and a thermal shrinkage in the TD direction at 100 ° C. of 0. A 5% polylactic acid film (thickness: 20 μm) was prepared, and a two-part curable urethane ink was printed on one side, and a grid pattern was printed at 1 cm intervals in the vertical and horizontal directions to provide an ink layer 2.

次に、インキ層２の面に、接着層３となる２液硬化型ウレタン系接着剤を介して、ドライラミネート法により、低密度ポリエチレン５０μｍを積層して、シーラント層４を設け、実施例１の深絞り成形用包装材料を得た。   Next, a sealant layer 4 is provided on the surface of the ink layer 2 by laminating 50 μm of low-density polyethylene by a dry laminating method through a two-component curable urethane adhesive that becomes the adhesive layer 3. A packaging material for deep drawing was obtained.

＜実施例２＞
ポリ乳酸フィルム１として、密度１．１０×１０３ｋｇ／ｍ３、ＴＤ方向の引張伸度が１４５％、１００℃でのＴＤ方向の熱収縮率が１．０％のポリ乳酸フィルム（厚さ２０μｍ）を用いた以外は、実施例１と同様にして、実施例２の深絞り成形用包装材料を得た。 <Example 2>
Polylactic acid film 1 having a density of 1.10 × 10 3 kg / m 3 , a tensile elongation in the TD direction of 145%, and a thermal shrinkage in the TD direction at 100 ° C. of 1.0% (thickness) The packaging material for deep drawing of Example 2 was obtained in the same manner as Example 1 except that 20 μm) was used.

＜実施例３＞
ポリ乳酸フィルム１として、密度１．４０×１０３ｋｇ／ｍ３、ＴＤ方向の引張伸度が１１５％、１００℃でのＴＤ方向の熱収縮率が０．１％のポリ乳酸フィルム（厚さ２０μｍ）を用いた以外は、実施例１と同様にして、実施例３の深絞り成形用包装材料を得た。 <Example 3>
Polylactic acid film 1 having a density of 1.40 × 10 3 kg / m 3 , a tensile elongation in the TD direction of 115%, and a thermal shrinkage in the TD direction at 100 ° C. of 0.1% (thickness) The packaging material for deep drawing of Example 3 was obtained in the same manner as Example 1 except that 20 μm) was used.

以下に、本発明の比較例について説明する。   Below, the comparative example of this invention is demonstrated.

＜比較例１＞
ポリ乳酸フィルム１として、密度１．００×１０３ｋｇ／ｍ３、ＴＤ方向の引張伸度が１５０％、１００℃でのＴＤ方向の熱収縮率が２．００％のポリ乳酸フィルム（厚さ２０μｍ）を用いた以外は、実施例１と同様にして、比較例１の深絞り成形用包装材料を得た。 <Comparative Example 1>
The polylactic acid film 1 has a density of 1.00 × 10 3 kg / m 3 , a tensile elongation in the TD direction of 150%, and a thermal shrinkage in the TD direction at 100 ° C. of 2.00% (thickness). A deep-drawing molding packaging material of Comparative Example 1 was obtained in the same manner as in Example 1 except that 20 μm) was used.

＜比較例２＞
ポリ乳酸フィルム１として、密度１．５０×１０３ｋｇ／ｍ３、ＴＤ方向の引張伸度が１１０％、１００℃でのＴＤ方向の熱収縮率が０．０５％のポリ乳酸フィルム（厚さ２０μｍ）を用いた以外は、実施例１と同様にして、比較例２の深絞り成形用包装材料を得た。 <Comparative example 2>
The polylactic acid film 1 has a density of 1.50 × 10 3 kg / m 3 , a tensile elongation in the TD direction of 110%, and a thermal shrinkage in the TD direction at 100 ° C. of 0.05% (thickness). A deep-drawing molding packaging material of Comparative Example 2 was obtained in the same manner as in Example 1 except that 20 μm) was used.

＜試験方法＞
実施例と比較例の深絞り成形用包装材料を下記の方法で試験し、比較評価した。 <Test method>
The deep draw molding packaging materials of the example and the comparative example were tested and evaluated by the following methods.

＜印刷ピッチ寸法精度＞
実施例と比較例の深絞り成形用包装材料をそれぞれ、開口部が直径１０ｃｍで底部が直径９ｃｍ、高さが３ｃｍの円錐台形状の凹部を設けた深絞り用成形型を用いて真空成形法で成形し、成形物の底部の中心にある格子のピッチを測定した。 <Print pitch dimensional accuracy>
Vacuum forming method of deep drawing molding materials of Examples and Comparative Examples using deep drawing molds each having an opening of 10 cm in diameter, a bottom of 9 cm in diameter, and a truncated cone-shaped recess having a height of 3 cm And the pitch of the lattice at the center of the bottom of the molded product was measured.

格子のピッチの変動が縦横それぞれ±０．２％以下を◎とし、±０．５％以下を○とし、それ以外を×として評価し、その結果を表１にまとめた。   The fluctuation of the pitch of the lattice was evaluated as ◎ when ± 0.2% or less in each of the vertical and horizontal directions, ◯ when ± 0.5% or less, and x as other, and the results are summarized in Table 1.

Figure 2014046975
以下に、実施例と比較例との比較結果について説明する。
Figure 2014046975
 Below, the comparison result of an Example and a comparative example is demonstrated.

＜比較結果＞
実施例１から３の深絞り成形用包装材料をもちいた場合は、いずれも印刷ピッチ寸法精度が良好であり、特に実施例１の深絞り成形用包装材料を用いた場合では、印刷ピッチ寸法精度が±０．２％以下となり、きわめて良好であった。 <Comparison result>
When the packaging material for deep drawing of Examples 1 to 3 is used, the printing pitch dimensional accuracy is good, especially when the packaging material for deep drawing of Example 1 is used. Was ± 0.2% or less, which was very good.

一方比較例１、２の深絞り成形用包装材料を用いた場合では、印刷ピッチ寸法精度が悪く、印刷後の加工や成形での変動が大きかった。また、比較例２の深絞り成形用包装材料を用いた場合では、底部と側壁の間がきれいに成形されなかった。   On the other hand, when the deep-drawing molding packaging materials of Comparative Examples 1 and 2 were used, the printing pitch dimension accuracy was poor, and variations in processing and molding after printing were large. In addition, when the deep drawing molding packaging material of Comparative Example 2 was used, the space between the bottom and the side wall was not neatly molded.

以上のように、本発明の深絞り成形用包装材料を用いることによって、従来の深絞り成形機を使用して、深絞り成形が可能であり、かつ、印刷の見当精度が良好であった。   As described above, by using the deep drawing molding material of the present invention, it is possible to perform deep drawing using a conventional deep drawing machine and good printing registration accuracy.

このため、底材側にも見当精度が良好な多色印刷が可能となり、印刷面積が広がったことから、商品のデザイン効果が高まり、商品のイメージアップ、店頭における訴求効果も良くなり、更に、情報提供の表示量を増やすことで、より的確な商品情報を消費者に提供が可能となった。   For this reason, multi-color printing with good registration accuracy is possible on the bottom material side, and the printing area has expanded, so the design effect of the product increases, the image of the product improves, the appeal effect at the store also improves, Increasing the amount of information provided can provide consumers with more accurate product information.

１・・・ポリ乳酸フィルム
２・・・インキ層
３・・・接着層
４・・・シーラント層
５・・・バリア層
６・・・接着層 DESCRIPTION OF SYMBOLS 1 ... Polylactic acid film 2 ... Ink layer 3 ... Adhesive layer 4 ... Sealant layer 5 ... Barrier layer 6 ... Adhesive layer

Claims (1)

ポリ乳酸フィルム、インキ層、接着層、シーラント層が順次積層され、前記ポリ乳酸フィルムの密度が１．１０〜１．４０×１０３ｋｇ／ｍ３、ＴＤ方向の引張伸度が１１５〜１４５％、１００℃でのＴＤ方向の熱収縮率が０〜１％であることを特徴とする深絞り成形用包装材料。 A polylactic acid film, an ink layer, an adhesive layer, and a sealant layer are sequentially laminated. The density of the polylactic acid film is 1.10 to 1.40 × 10 3 kg / m 3 , and the tensile elongation in the TD direction is 115 to 145%. A deep-drawing packaging material having a thermal shrinkage in the TD direction at 100 ° C. of 0 to 1%.
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Citations (8)

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Publication number Priority date Publication date Assignee Title
JPH06344527A (en) * 1993-06-04 1994-12-20 Dainippon Printing Co Ltd Deep draw container bottom material
JP2003082075A (en) * 2001-09-07 2003-03-19 Unitika Ltd Polylactic acid-based film and packaging bag made of the same
WO2003037966A1 (en) * 2001-11-01 2003-05-08 Asahi Kasei Life & Living Corporation Biaxially oriented polylactic acid-based resin films
JP2003342391A (en) * 2002-05-29 2003-12-03 Unitika Ltd Processing film
JP2006124662A (en) * 2004-09-29 2006-05-18 Toray Ind Inc Biaxially oriented polylactic acid film, molding composed of the same and substrate
JP2010001369A (en) * 2008-06-19 2010-01-07 Mitsubishi Plastics Inc Resin composition, and film and laminate using the same
JP2010111094A (en) * 2008-11-10 2010-05-20 Mitsubishi Plastics Inc Composite film, bottom material for deep-drawn wrapping and deep-drawn container using the composite film
JP2011162713A (en) * 2010-02-12 2011-08-25 Teijin Ltd White biaxially oriented polylactic acid film

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JPH06344527A (en) * 1993-06-04 1994-12-20 Dainippon Printing Co Ltd Deep draw container bottom material
JP2003082075A (en) * 2001-09-07 2003-03-19 Unitika Ltd Polylactic acid-based film and packaging bag made of the same
WO2003037966A1 (en) * 2001-11-01 2003-05-08 Asahi Kasei Life & Living Corporation Biaxially oriented polylactic acid-based resin films
JP2003342391A (en) * 2002-05-29 2003-12-03 Unitika Ltd Processing film
JP2006124662A (en) * 2004-09-29 2006-05-18 Toray Ind Inc Biaxially oriented polylactic acid film, molding composed of the same and substrate
JP2010001369A (en) * 2008-06-19 2010-01-07 Mitsubishi Plastics Inc Resin composition, and film and laminate using the same
JP2010111094A (en) * 2008-11-10 2010-05-20 Mitsubishi Plastics Inc Composite film, bottom material for deep-drawn wrapping and deep-drawn container using the composite film
JP2011162713A (en) * 2010-02-12 2011-08-25 Teijin Ltd White biaxially oriented polylactic acid film

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Title
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