JPWO2018173713A1 - 油膜形成能を有する表面を備えた構造体及び油膜形成方法 - Google Patents
油膜形成能を有する表面を備えた構造体及び油膜形成方法 Download PDFInfo
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- JPWO2018173713A1 JPWO2018173713A1 JP2019507502A JP2019507502A JPWO2018173713A1 JP WO2018173713 A1 JPWO2018173713 A1 JP WO2018173713A1 JP 2019507502 A JP2019507502 A JP 2019507502A JP 2019507502 A JP2019507502 A JP 2019507502A JP WO2018173713 A1 JPWO2018173713 A1 JP WO2018173713A1
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Classifications
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Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
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Abstract
Description
かかる技術によれば、成形体表面を形成する合成樹脂に滑剤などの添加剤を加える場合と比して、滑り性を飛躍的に高めることができるため、現在注目されている。
即ち、フィルム表面への油膜形成は、油脂をスプレー等によりフィルム表面にコーティングすることにより行われるが、工業的に実施する場合には、かかる油膜形成は長尺フィルムについて行われる。長尺フィルムをローラで巻き取る際に、その表面に油膜が形成され、従って、表面に油膜が形成されている状態で長尺フィルムがロールで巻き取られ、使用に際しては、油膜が形成されている長尺フィルムを巻出し、用途に応じた適宜の大きさに裁断して使用されることになるわけである。
本発明の他の目的は、上記の構造体の表面に油膜を形成する方法を提供することにある。
(1)前記基材がフィルムであること、
(2)前記水溶性有機材料が、セルロース系ポリマー、多糖類、デキストリン或いはシクロデキストリンであり、前記油脂が食用油であること、
が好適である。
(1)前記水溶性有機材料固体層を表面に備えた前記基材を容器の形状に成形し、成形された容器内に、前記含水物質に相当する含水内容物を充填することにより、前記水溶性有機材料固体層と含水物質との接触による油膜の形成を行うこと、
(2)前記基材表面に前記水溶性有機材料固体層を設けた後、容器の形状に成形すること、
(3)前記容器が袋であること、
が好適である。
また、かかる構造体において、前記水溶性有機材料固体層は、油膜形成能を有しており、この水溶性有機材料固体層に含水物質を接触するという極めて簡単な手段で油膜を形成することができる。即ち、含水物質との接触により水溶性有機材料は溶解し、この層が消失すると同時に内蔵されている油脂が溶出することにより、油膜が形成されることとなる。
このように本発明の構造体は、成形後の油膜の裏移りの問題が有効に回避されているため、表面に油膜を備え、含水物に対する滑り性が向上した製品として工業的に実施することができる。
また、油分吸収性などを示さないデンプンやアルギン酸ナトリウムなどの多糖類や、メチルセルロース、カルボキシセルロースなどのセルロース系ポリマー、或いはポリビニルアルコールなどであっても、これらと少量の油脂とを混合し、粒状化してマイクロカプセルの形態とすることにより、油脂を内蔵することができる。
本発明においては、特に、この構造体を食品用途或いは医薬品などの用途に使用する場合には、人体に対する安全性などの観点から、セルロース系ポリマー、各種多糖類、シクロデキストリン等が水溶性有機材料として好適に使用される。
このような表面張力を有する油脂としては、脂肪酸トリグリセライド、各種の植物油などが代表的である。特に滑り性の対象となる物質が食品類(例えばマヨネーズやケチャップ)である場合には、食用油が好適である。
かかる食用油の具体例としては、大豆油、菜種油、オリーブオイル、米油、コーン油、べに花油、ごま油、パーム油、ひまし油、アボガド油、ココナッツ油、アーモンド油、クルミ油、はしばみ油、サラダ油などを例示することができる。
例えば、その材質によっては、ブラスト処理等により粗面化を行い、このような粗面に水溶性有機材料固体層3を形成することにより、この固体層3を安定に保持することができる。
このような熱可塑性樹脂としては、例えば、以下のものを例示することができる。
オレフィン系樹脂、例えば、低密度ポリエチレン、高密度ポリエチレン、ポリプロピレン、ポリ1−ブテン、ポリ4−メチル−1−ペンテンあるいはエチレン、プロピレン、1−ブテン、4−メチル−1−ペンテン等のα−オレフィン同士のランダムあるいはブロック共重合体、環状オレフィン共重合体など;
エチレン・ビニル系共重合体、例えば、エチレン・酢酸ビニル共重合体、エチレン・ビニルアルコール共重合体、エチレン・塩化ビニル共重合体等;
スチレン系樹脂、例えば、ポリスチレン、アクリロニトリル・スチレン共重合体、ABS、α−メチルスチレン・スチレン共重合体等;
ビニル系樹脂、例えば、ポリ塩化ビニル、ポリ塩化ビニリデン、塩化ビニル・塩化ビニリデン共重合体、ポリアクリル酸メチル、ポリメタクリル酸メチル等;
ポリアミド樹脂、例えば、ナイロン6、ナイロン6−6、ナイロン6−10、ナイロン11、ナイロン12等;
ポリエステル樹脂、例えば、ポリエチレンテレフタレート(PET)、ポリブチレンテレフタレート、ポリエチレンナフタレート、及びこれらの共重合ポリエステル等;
ポリカーボネート樹脂;
ポリフェニレンオキサイド樹脂;
生分解性樹脂、例えば、ポリ乳酸など;
勿論、成形性が損なわれない限り、これらの熱可塑性樹脂のブレンド物を、下地樹脂として使用することもできる。
このような内容物となる含水物質としては、粘度(25℃)が100mPa・s以上のもの、例えば、マヨネーズ、ケチャップ、水性糊、蜂蜜、各種ソース類、マスタード、ドレッシング、ジャム、チョコレートシロップ、乳液等の化粧液、液体洗剤、シャンプー、リンス、或いはプリンやヨーグルトなどのゲル状物質、さらにはカレー、とろみをつけた各種食品類などが好適である。
また、このようなフィルムによりパウチを作製し、この内部にカレーを充填し、1時間程度放置したところ、水溶性有機材料が溶解し、油膜が生成していたことも確認している。
100mm×100mmの内面ポリプロピレンフィルムをプレートに貼り、その上に100質量部のデキストリン(デキストリン水和物:純正化学(株)製)と30質量部の中鎖脂肪酸(ココナードMT:花王(株)製)を混合した粉末を散布した。更にその上にトマトケチャップ10gを厚みが均一になるように塗布し、作業台に対して90度の角度で立て、1分間静置した。その後、プレートを水平に戻し、フィルム上に残存したトマトケチャップの量を測定し、フィルムからの滑落量を算出した。結果を表1に示す。
3:水溶性有機材料固体層
5:含水物質
7:油膜
Claims (7)
- 油脂を内蔵している水溶性有機材料固体層が基材表面に設けられていることを特徴とする構造体。
- 前記基材がフィルムである請求項1に記載の構造体。
- 前記水溶性有機材料が、セルロース系ポリマー、多糖類、デキストリン或いはシクロデキストリンであり、前記油脂が食用油である請求項1に記載の構造体。
- 請求項1に記載の構造体の表面の水溶性有機材料固体層に含水物質を接触させることにより、該水溶性有機材料固体層から油脂を溶出させて油膜を形成することを特徴とする構造体表面への油膜形成方法。
- 前記水溶性有機材料固体層を表面に備えた前記基材を容器の形状に成形し、成形された容器内に、前記含水物質に相当する含水内容物を充填することにより、前記水溶性有機材料固体層と含水物質との接触による油膜の形成を行う請求項4に記載の油膜形成方法。
- 前記基材表面に前記水溶性有機材料固体層を設けた後、容器の形状に成形する請求項5に記載の油膜形成方法。
- 前記容器が袋である請求項5に記載の油膜形成方法。
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US20200024043A1 (en) | 2020-01-23 |
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