JP4504576B2 - Light-shielding polyolefin resin film for agriculture - Google Patents
Light-shielding polyolefin resin film for agriculture Download PDFInfo
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- JP4504576B2 JP4504576B2 JP2001026409A JP2001026409A JP4504576B2 JP 4504576 B2 JP4504576 B2 JP 4504576B2 JP 2001026409 A JP2001026409 A JP 2001026409A JP 2001026409 A JP2001026409 A JP 2001026409A JP 4504576 B2 JP4504576 B2 JP 4504576B2
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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Description
【０００１】
【発明の属する技術分野】
本発明は、農業用ハウスや農業用トンネルなどの農業用施設に使用される遮光性農業用ポリオレフィン系樹脂フイルムに関し、更に詳しくは、遮光安定性、フイルム強度、耐候性の良好な５層構造の遮光性農業用ポリオレフィン系樹脂フイルムに関するものである。
【０００２】
【従来の技術】
従来より遮光性フイルムを利用して、花卉園芸植物の開花時期の調整や夏期のほうれん草、ダイコン、イチゴ栽培などに使用されてきた。
これらに使用される遮光性フイルムは、一層乃至三層構造のものが使用されている。
【０００３】
【発明が解決しようとする課題】
上記の遮光性フイルムは、アルミニウム顔料や酸化チタン顔料をそれぞれの層に使用し、表面層の反射率を向上させて、フイルム全体を遮光率を向上させたものであるが、アルミニウム顔料は、酸化されやすく、長期間使用すると遮光率が低下するという欠点がある。
【０００４】
【発明の目的】
本発明は、上記の問題点を解消し、長期使用においても遮光率の低下がなく耐久性に優れた５層構造の遮光性農業用ポリオレフィン系樹脂フイルムを提供することを目的としている。
【０００５】
【課題を解決するための手段】
本発明は、農業用施設などに被覆される遮光性農業用ポリオレフィン系樹脂フイルムにおいて、（Ａ）線状低密度ポリエチレン樹脂を主成分とする透明樹脂層、（Ｂ）線状低密度ポリエチレン樹脂を主成分とする樹脂成分に酸化チタン顔料を配合した白色樹脂層、（Ｃ）線状低密度ポリエチレン樹脂を主成分とする樹脂成分に酸化チタンおよびカーボンブラック顔料を配合した灰色樹脂層、（Ｄ）酢酸ビニル含有量が５〜２８重量％のポリオレフィン系樹脂を主成分とする樹脂成分にアルミニウム顔料を配合した銀色樹脂層、（Ｅ）酢酸ビニル含有量が３〜１５重量％のポリオレフィン系樹脂を主成分とする透明樹脂層の順に５層構造とされ、フイルム全体の厚みが７５〜１６０μｍの範囲で、遮光率が９９．９％以上であることを特徴とする遮光性農業用ポリオレフィン系樹脂フイルムである。
【０００６】
本発明の（Ｂ）層ないし（Ｄ）層の各樹脂成分１００重量部に対して、（Ｂ）層の酸化チタン顔料の配合割合が２５〜８０重量部、好ましくは３０〜５０重量部、（Ｃ）層の酸化チタン顔料の配合割合が３〜３０重量部、好ましくは４〜１５重量部およびカーボンブラック顔料の配合割合が３〜３０重量部、好ましくは４〜１５重量部、（Ｄ）層のアルミニウム顔料の配合割合が３〜２０重量部、好ましくは４〜１５重量部の範囲が好ましい。
【０００７】
また、（Ｄ）層および／または（Ｅ）層には、防曇剤を配合することによって、防曇性を付与することもできる。防曇剤としては、通常、農業用ポリオレフィン系樹脂フイルムに使用されているもので、例えば、ソルビタン系、グリセリン系、ジグリセリン系などの多価アルコールと脂肪酸との部分エステル或いはこれらとアルキレングリコールとの縮合物を挙げることができる。
これらの防曇剤の配合量は、その層の樹脂成分１００重量部に対して、１〜５重量部、好ましくは１．２〜３重量部の範囲で用いられる。
【０００８】
（Ａ）層、（Ｂ）層および（Ｃ）層に使用される線状低密度ポリエチレン樹脂は、メタロセン触媒系やチグラー触媒系で製造されたもので、これらの層に使用することにより、（Ｂ）層の酸化チタン顔料、（Ｃ）層の酸化チタン顔料およびカーボンブラックを多量に配合しているにもかかわらず、（Ａ）層が補強して、極めて強度の高い遮光性農業用ポリオレフィン系樹脂フイルムとすることができる。
【０００９】
また、本発明は、上記の（Ｂ）層、（Ｃ）層および（Ｄ）層の少なくとも１層が、その層の樹脂成分中に、リアクターＴＰＯを１〜３５重量％、好ましくは４〜２０重量％の範囲で配合し、これらの層に多量に配合される顔料によるフイルム強度の低下を防止することができる。
このリアクターＴＰＯは、重合段階でオレフィン系樹脂にエチレンプロピレンゴムをアロイ化させた樹脂であって、反応器中で製造するＴＰＯということから、リアクターＴＰＯと呼ばれている。
具体的には、モンテル社の「キャタロイ」、徳山曹達社の「Ｐ．Ｅ．Ｒ」等が挙げられる。
これらのリアクターＴＰＯの配合量が、その層の樹脂成分において、３５重量％を超えるとフイルム生産時のモーター負荷が大きくなり製膜が困難となるので好ましくない。
【００１０】
（Ｄ）層の酢酸ビニル含有量が５〜２８重量％のポリオレフィン系樹脂は、エチレン−酢酸ビニル共重合体単独またはエチレン−酢酸ビニル共重合体と低密度ポリエチレン樹脂の混合物であってもよく、この樹脂成分にアルミニウム顔料を配合することによって分散が容易で遮光性に優れた層とすることができる。
更に、（Ｅ）層の酢酸ビニル含有量が３〜１５重量％のポリオレフィン系樹脂を主成分とする透明樹脂層を積層されているので、アルミニウム顔料の酸化劣化を防止し、極めて耐久性の高い遮光性農業用ポリオレフィン系樹脂フイルムとすることができる。
この（Ｅ）層ポリオレフィン系樹脂も上記の（Ｄ）層と同様にエチレン−酢酸ビニル共重合体単独またはエチレン−酢酸ビニル共重合体と低密度ポリエチレン樹脂の混合物であってもよい。
【００１１】
【発明の実施の形態】
以下、本発明の実施の形態について、具体的に説明する。
【００１２】
（遮光率）
キセノンランプの照度を照度計で測定し基準値を決めた後、キセノンランプを各試料で遮蔽し、キセノンラップの漏れた光の照度を測定し、遮光率を計算で求めた。
◎：９９．９５％以上
○：９９．９％以上、９９．９５％未満
△：９９．０％以上、９９．９％未満
×：９９．０％未満
【００１３】
（突き刺し強度）
インフレーションフイルムの押出し方向に長さ１１０ｃｍ、その直交方向に８ｃｍの試料を採取し、１０ｃｍ間隔にφ１ｃｍの印を１０ヶ所つけたものを１０枚用意した。常温で指抜け試験（Ｎ＝１００）を行い、抵抗無く指抜けする割合を算出し、下記の基準で評価した。
◎：７％未満
○：７％以上、１０％未満
△：１０％以上、４０％未満
×：４０％以上
【００１４】
（色抜け）
殺虫剤（ＤＤＶＰ）の５００倍水溶液（常温）に１０ｃｍ×１０ｃｍの試料を１ヶ月間浸漬し、水洗、乾燥した後、試験前の試料との比較を目視で評価した。
○：変化なし、あるいは極めて僅か変化あり
△：色抜けが認められる
×：著しい色抜けが認められる
【００１５】
実施例１
５種５層のインフレーション装置を用いて、外側より（Ａ）層として、線状低密度ポリエチレン樹脂（出光石油化学社製、「モアテック０１３８」）１００重量部を、（Ｂ）層として、線状低密度ポリエチレン樹脂（「モアテック０１３８」）９１．２５重量部に、酸化チタン顔料マスターバッチ（日弘ビックス社製、「ＰＯ−０１０７ホワイト」、バインダー：低密度ポリエチレン樹脂２０重量％、顔料：８０重量％）４３．７５重量部を配合し、（Ｃ）層として、線状低密度ポリエチレン樹脂（「モアテック０１３８」）８６重量部に、酸化チタン顔料マスターバッチ（「ＰＯ−０１０７ホワイト」）１０重量部とカーボンブラック顔料マスターバッチ（東洋インキ社製、「ＴＥＴ−０１３３７ブラック」、バインダー：低密度ポリエチレン樹脂６０重量％、顔料：４０重量％）２０重量部を配合し、（Ｄ）層として、酢酸ビニル含有量１０重量％のエチレン−酢酸ビニル共重合体８９．５重量部にアルミニウム顔料マスターバッチ（住友カラー社製、「ＳＰＥＭ−８Ｋ４４５シルバー」、バインダー：低密度ポリエチレン樹脂６０重量％、顔料：４０重量％）１７．５重量部を配合し、（Ｅ）層として、酢酸ビニル含有量１０重量％のエチレン−酢酸ビニル共重合体１００重量部を使用し、また、各層には樹脂成分１００重量部に対して、ヒンダードアミン系光安定剤０．３重量部を配合し、これらを各押出機に供給し、各層１６μｍ、合計厚さ８０μｍの５種５層の遮光性農業用ポリオレフィン系樹脂フイルムを製造した。
このフイルムの評価を表１に示す。
【００１６】
実施例２
前記の実施例１において、各層の厚さを２５μｍ、合計厚さを１２５μｍとした以外は、実施例１と同様にして５種５層の遮光性農業用ポリオレフィン系樹脂フイルムを製造した。
このフイルムの評価を表１に示す。
【００１７】
実施例３
前記の実施例１において、（Ｂ）層は、線状低密度ポリエチレン樹脂（「モアテック０１３８」）７５重量部に、酸化チタン顔料マスターバッチ（日弘ビックス社製、「ＰＯ−０１０７ホワイト」）５０重量部、リアクターＴＰＯ（モンテル社、「キャタロイ」）１０重量部を配合し、（Ｃ）層は、線状低密度ポリエチレン樹脂（「モアテック０１３８」）８４．２５重量部に、酸化チタン顔料マスターバッチ（日弘ビックス社製、「ＰＯ−０１０７ホワイト」）１１．２５重量部、カーボンブラック顔料マスターバッチ（東洋インキ社製、「ＴＥＴ−０１３３７ブラック」）２２．５重量部を配合し、（Ｄ）層は、酢酸ビニル含有量１０重量％のエチレン−酢酸ビニル共重合体８６．５重量部に、アルミニウム顔料マスターバッチ（住友カラー社製、「ＳＰＥＭ−８Ｋ４４５シルバー」）２２．５重量部を配合した以外は、実施例１と同様にして５種５層の遮光性農業用ポリオレフィン系樹脂フイルムを製造した。
このフイルムの評価を表１に示す。
【００１８】
実施例４
前記の実施例１において、（Ｂ）層は、線状低密度ポリエチレン樹脂（「モアテック０１３８」）８７．５重量部に、酸化チタン顔料マスターバッチ（日弘ビックス社製、「ＰＯ−０１０７ホワイト」）３７．５重量部、リアクターＴＰＯ（モンテル社、「キャタロイ」）５重量部を配合し、（Ｄ）層は、酢酸ビニル含有量１０重量％のエチレン−酢酸ビニル共重合体８６重量部に、アルミニウム顔料マスターバッチ（住友カラー社製、「ＳＰＥＭ−８Ｋ４４５シルバー」）１５重量部を配合し、更に、防曇剤を（Ｄ）層に２．５重量部、（Ｅ）層に１．５重量部を配合し、各層の厚さを２５μｍ、合計厚さを１２５μｍとした以外は、実施例１と同様にして５種５層の遮光性農業用ポリオレフィン系樹脂フイルムを製造した。
このフイルムの評価を表１に示す。
【００１９】
実施例５
前記の実施例１において、（Ｄ）層は、酢酸ビニル含有量５重量％のエチレン−酢酸ビニル共重合体８１．５重量部に、アルミニウム顔料マスターバッチ（住友カラー社製、「ＳＰＥＭ−８Ｋ４４５シルバー」）１７．５重量部、リアクターＴＰＯ（モンテル社、「キャタロイ」）８重量部を配合し、更に、防曇剤を（Ｄ）層に２．５重量部、（Ｅ）層に１．５重量部配合した以外は、実施例１と同様にして５種５層の遮光性農業用ポリオレフィン系樹脂フイルムを製造した。
このフイルムの評価を表１に示す。
【００２０】
【表１】
実施例６
前記の実施例１において、（Ｂ）層は、線状低密度ポリエチレン樹脂（「モアテック０１３８」）８７．５重量部に、酸化チタン顔料マスターバッチ（日弘ビックス社製、「ＰＯ−０１０７ホワイト」）３７．５重量部、リアクターＴＰＯ（モンテル社、「キャタロイ」）５重量部を配合し、（Ｃ）層は、線状低密度ポリエチレン樹脂（「モアテック０１３８」）９１．２５重量部に、酸化チタン顔料マスターバッチ（日弘ビックス社製、「ＰＯ−０１０７ホワイト」）６．２５重量部、カーボンブラック顔料マスターバッチ（東洋インキ社製、「ＴＥＴ−０１３３７ブラック」）１２．５重量部を配合し、（Ｄ）層は、酢酸ビニル含有量１０重量％のエチレン−酢酸ビニル共重合体８１．５重量部に、アルミニウム顔料マスターバッチ（住友カラー社製、「ＳＰＥＭ−８Ｋ４４５シルバー」）１３．７５重量部、リアクターＴＰＯ（モンテル社、「キャタロイ」）５重量部を配合し、更に、防曇剤を（Ｄ）層に２．５重量部、（Ｅ）層に１．５重量部配合した以外は、実施例１と同様にして５種５層の遮光性農業用ポリオレフィン系樹脂フイルムを製造した。
このフイルムの評価を表２に示す。
【００２２】
実施例７
前記の実施例１において、（Ｂ）層は、線状低密度ポリエチレン樹脂（「モアテック０１３８」）８３．７５重量部に、酸化チタン顔料マスターバッチ（日弘ビックス社製、「ＰＯ−０１０７ホワイト」）５６．２５重量部、リアクターＴＰＯ（モンテル社、「キャタロイ」）５重量部を配合し、（Ｃ）層は、線状低密度ポリエチレン樹脂（「モアテック０１３８」）９１．２５重量部に、酸化チタン顔料マスターバッチ（日弘ビックス社製、「ＰＯ−０１０７ホワイト」）６．２５重量部、カーボンブラック顔料マスターバッチ（東洋インキ社製、「ＴＥＴ−０１３３７ブラック」）１２．５重量部を配合し、（Ｄ）層は、酢酸ビニル含有量１０重量％のエチレン−酢酸ビニル共重合体７７重量部に、アルミニウム顔料マスターバッチ（住友カラー社製、「ＳＰＥＭ−８Ｋ４４５シルバー」）２５重量部、リアクターＴＰＯ（モンテル社、「キャタロイ」）８重量部を配合し、更に、防曇剤を（Ｄ）層に２．５重量部、（Ｅ）層に１．５重量部配合した以外は、実施例１と同様にして５種５層の遮光性農業用ポリオレフィン系樹脂フイルムを製造した。
このフイルムの評価を表２に示す。
【００２３】
比較例１
前記の実施例１において、（Ａ）層、（Ｂ）層および（Ｃ）層で使用した線状低密度ポリエチレン樹脂の代わりに、高圧法低密度ポリエチレン樹脂（日本ユニカー社製、「ＮＵＣ−８１３３」）に変更したこと以外は、実施例１と同様にして５種５層の遮光性農業用ポリオレフィン系樹脂フイルムを製造した。
このフイルムの評価を表２に示す。
【００２４】
比較例２
３種３層のインフレーション装置を用いて、外側より（Ｂ）層として、高圧法低密度ポリエチレン樹脂（「ＮＵＣ−８１３３」）９１．２５重量部に、酸化チタン顔料マスターバッチ（日弘ビックス社製、「ＰＯ−０９０７ホワイト」）４３．７５重量部を配合し、（Ｃ）層として、高圧法低密度ポリエチレン樹脂（「ＮＵＣ−８１３３」）１００重量部に、酸化チタン顔料マスターバッチ（「ＰＯ−０９０７ホワイト」）１０重量部、カーボンブラック顔料マスターバッチ（東洋インキ社製、「ＴＥＴ−０１３３７ブラック」）２０重量部を配合し、（Ｄ）層として、酢酸ビニル含有量１０重量％のエチレン−酢酸ビニル共重合体８９．５重量部に、アルミニウム顔料マスターバッチ（住友カラー社製、「ＳＰＥＭ−８Ｋ４４５シルバー」）１７．５重量部を配合し、また、各層には樹脂成分１００重量部に対して、ヒンダードアミン系光安定剤０．３重量部を配合し、これらを各押出機に供給し、各層約２７μｍ、合計厚さ８０μｍの３種３層の遮光性農業用ポリオレフィン系樹脂フイルムを製造した。
このフイルムの評価を表２に示す。
【００２５】
比較例３
３種３層のインフレーション装置を用いて、外側より（Ｂ）層として、線状低密度ポリエチレン樹脂（「モアテック０１３８」）９１．２５重量部に、酸化チタン顔料マスターバッチ（「ＰＯ−０９０７ホワイト」）４３．７５重量部を配合し、（Ｃ）層として、線状低密度ポリエチレン樹脂（「モアテック０１３８」）７６重量部に、アルミニウム顔料マスターバッチ（「ＳＰＥＭ−８Ｋ４４５シルバー」）２０重量部、カーボンブラック顔料マスターバッチ（「ＴＥＴ−０１３３７ブラック」）２０重量部を配合し、（Ｄ）層として、線状低密度ポリエチレン樹脂（「モアテック０１３８」）８９．５重量部に、アルミニウム顔料マスターバッチ（「ＳＰＥＭ−８Ｋ４４５シルバー」）１７．５重量部を配合し、また、各層には樹脂成分１００重量部に対して、ヒンダードアミン系光安定剤０．３重量部を配合し、これらを各押出機に供給し、各層約２７μｍ、合計厚さ８０μｍの３種３層の遮光性農業用ポリオレフィン系樹脂フイルムを製造した。
このフイルムの評価を表２に示す。
【００２６】
【表２】
【発明の効果】
長期使用においても遮光率の低下がなく耐久性に優れ、フイルム強度に優れた５層構造の遮光性農業用ポリオレフィン系樹脂フイルムを提供することできる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a light-shielding polyolefin-based resin film for agricultural use used in agricultural facilities such as agricultural houses and agricultural tunnels, and more specifically, has a five-layer structure with good light-shielding stability, film strength, and weather resistance. The present invention relates to a light-shielding polyolefin resin film for agriculture.
[0002]
[Prior art]
Traditionally, it has been used to adjust the flowering time of flower garden plants and to grow spinach, radish, and strawberries in the summer by using a light-shielding film.
The light-shielding film used for these has a one-layer to three-layer structure.
[0003]
[Problems to be solved by the invention]
The above light-shielding film uses an aluminum pigment or a titanium oxide pigment for each layer, improves the reflectance of the surface layer, and improves the light-shielding rate of the entire film. There is a drawback that the shading rate is lowered when used for a long time.
[0004]
OBJECT OF THE INVENTION
An object of the present invention is to solve the above-mentioned problems and to provide a light-shielding agricultural polyolefin-based resin film having a five-layer structure which does not decrease the light-shielding rate even in long-term use and has excellent durability.
[0005]
[Means for Solving the Problems]
The present invention relates to a light-shielding polyolefin resin film for agricultural use that is coated on agricultural facilities and the like, wherein (A) a transparent resin layer mainly composed of a linear low-density polyethylene resin, and (B) a linear low-density polyethylene resin. A white resin layer in which a titanium oxide pigment is blended with a resin component as a main component, (C) a gray resin layer in which titanium oxide and a carbon black pigment are blended in a resin component whose main component is a linear low density polyethylene resin, (D) A silver resin layer in which an aluminum pigment is blended with a resin component mainly composed of a polyolefin resin having a vinyl acetate content of 5 to 28% by weight, and (E) a polyolefin resin having a vinyl acetate content of 3 to 15% by weight. The transparent resin layer as a component has a five-layer structure in order, and the total film thickness is in the range of 75 to 160 μm, and the light shielding rate is 99.9% or more. A light-shielding agricultural polyolefin resin film.
[0006]
The blending ratio of the titanium oxide pigment in the (B) layer is 25 to 80 parts by weight, preferably 30 to 50 parts by weight, with respect to 100 parts by weight of each resin component in the (B) layer to (D) layer of the present invention. C) The proportion of titanium oxide pigment in the layer is 3 to 30 parts by weight, preferably 4 to 15 parts by weight, and the proportion of carbon black pigment is 3 to 30 parts by weight, preferably 4 to 15 parts by weight. The mixing ratio of the aluminum pigment is 3 to 20 parts by weight, preferably 4 to 15 parts by weight.
[0007]
Moreover, antifogging property can also be provided to the (D) layer and / or the (E) layer by blending an antifogging agent. The antifogging agent is usually used in agricultural polyolefin resin films. For example, partial esters of polyhydric alcohols and fatty acids such as sorbitan, glycerin, diglycerin, etc., and these and alkylene glycols. Can be mentioned.
These antifogging agents are used in an amount of 1 to 5 parts by weight, preferably 1.2 to 3 parts by weight, based on 100 parts by weight of the resin component of the layer.
[0008]
The linear low density polyethylene resin used for the (A) layer, the (B) layer, and the (C) layer is manufactured with a metallocene catalyst system or a Ziegler catalyst system. Despite containing a large amount of B) layer titanium oxide pigment, (C) layer titanium oxide pigment and carbon black, (A) layer is reinforced and extremely strong light-shielding agricultural polyolefin-based It can be a resin film.
[0009]
In the present invention, at least one of the (B) layer, the (C) layer, and the (D) layer includes 1 to 35% by weight of the reactor TPO in the resin component of the layer, preferably 4 to 20%. By blending in the range of% by weight, it is possible to prevent a decrease in film strength due to a pigment blended in a large amount in these layers.
This reactor TPO is a resin obtained by alloying an olefin resin with ethylene propylene rubber in the polymerization stage, and is called a reactor TPO because it is a TPO produced in a reactor.
Specifically, “Cataloy” of Montel Co., “PER” of Tokuyama Soda Co., Ltd. and the like can be mentioned.
If the blending amount of these reactors TPO exceeds 35% by weight in the resin component of the layer, it is not preferable because the motor load during film production increases and film formation becomes difficult.
[0010]
The polyolefin resin having a vinyl acetate content of 5 to 28% by weight of the layer (D) may be an ethylene-vinyl acetate copolymer alone or a mixture of an ethylene-vinyl acetate copolymer and a low-density polyethylene resin. By blending this resin component with an aluminum pigment, a layer that is easy to disperse and has excellent light shielding properties can be obtained.
Furthermore, since the transparent resin layer mainly composed of polyolefin resin having a vinyl acetate content of 3 to 15% by weight of (E) layer is laminated, it prevents oxidation deterioration of the aluminum pigment and is extremely durable. It can be set as the polyolefin resin film for light-shielding agriculture.
This (E) layer polyolefin resin may be an ethylene-vinyl acetate copolymer alone or a mixture of an ethylene-vinyl acetate copolymer and a low-density polyethylene resin, similarly to the (D) layer.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described.
[0012]
(Shading rate)
After measuring the illuminance of the xenon lamp with an illuminometer and determining a reference value, the xenon lamp was shielded with each sample, the illuminance of the light leaked from the xenon wrap was measured, and the light shielding rate was calculated.
A: 99.95% or more ○: 99.9% or more, less than 99.95% Δ: 99.0% or more, less than 99.9% ×: less than 99.0%
(Puncture strength)
A sample having a length of 110 cm in the direction of extrusion of the inflation film and an 8 cm length in the direction perpendicular thereto was taken, and 10 sheets with 10 φ1 cm marks at 10 cm intervals were prepared. A finger pull-out test (N = 100) was performed at room temperature, the ratio of finger pull-out without resistance was calculated, and evaluated according to the following criteria.
◎: Less than 7% ○: 7% or more, less than 10% △: 10% or more, less than 40% ×: 40% or more
(Color loss)
A sample of 10 cm × 10 cm was immersed in a 500-fold aqueous solution (normal temperature) of an insecticide (DDVP) for 1 month, washed with water, dried, and then visually compared with the sample before the test.
○: No change or very slight change Δ: Color loss is observed ×: Significant color loss is recognized [0015]
Example 1
Using 5 types and 5 layers of inflation device, 100 parts by weight of a linear low density polyethylene resin (“Mortec 0138”, manufactured by Idemitsu Petrochemical Co., Ltd.) is used as the (A) layer from the outside. 91.25 parts by weight of low-density polyethylene resin (“Moretech 0138”), titanium oxide pigment master batch (manufactured by Nihongo Bix, “PO-0107 white”), binder: 20% by weight of low-density polyethylene resin, pigment: 80% by weight %) 43.75 parts by weight, and as layer (C), 86 parts by weight of a linear low density polyethylene resin (“Moretech 0138”) and 10 parts by weight of a titanium oxide pigment master batch (“PO-0107 white”) And carbon black pigment masterbatch (manufactured by Toyo Ink, “TET-01337 Black”, binder: low-density polyethylene 20 parts by weight of resin (60% by weight of pigment, 40% by weight of pigment), and (D) layer is an aluminum pigment masterbatch with 89.5 parts by weight of ethylene-vinyl acetate copolymer having a vinyl acetate content of 10% by weight. (Sumitomo Color Co., Ltd., “SPEM-8K445 Silver”, binder: low-density polyethylene resin 60% by weight, pigment: 40% by weight) 17.5 parts by weight are blended, and (E) layer has a vinyl acetate content of 10%. % Ethylene-vinyl acetate copolymer is used in an amount of 100 parts by weight, and each layer is mixed with 0.3 parts by weight of a hindered amine light stabilizer with respect to 100 parts by weight of the resin component. A five-layer, five-layer, light-shielding, agricultural polyolefin-based resin film having a thickness of 16 μm and a total thickness of 80 μm was produced.
The evaluation of this film is shown in Table 1.
[0016]
Example 2
A five-layer, five-layer, light-shielding agricultural polyolefin resin film was produced in the same manner as in Example 1, except that the thickness of each layer was 25 μm and the total thickness was 125 μm.
The evaluation of this film is shown in Table 1.
[0017]
Example 3
In Example 1 described above, the layer (B) was composed of 75 parts by weight of a linear low density polyethylene resin (“Moretech 0138”) and a titanium oxide pigment masterbatch (manufactured by Nihongo Bix, “PO-0107 White”) 50 Part by weight, 10 parts by weight of reactor TPO (Montel, “Cataloy”) is blended, and (C) layer is 84.25 parts by weight of linear low-density polyethylene resin (“Moretech 0138”), and a titanium oxide pigment master batch. 12.5 parts by weight (manufactured by Nihongo Bix, "PO-0107 White") and 22.5 parts by weight of carbon black pigment masterbatch (manufactured by Toyo Ink, "TET-01337 Black") are blended, and (D) The layer is composed of 86.5 parts by weight of an ethylene-vinyl acetate copolymer having a vinyl acetate content of 10% by weight and an aluminum pigment master batch (Sumitomo Chemical). Chromatography Inc., except that blended "SPEM-8K445 Silver") 22.5 parts by weight, to produce a light-shielding agricultural polyolefin resin film of the five 5 layers in the same manner as in Example 1.
The evaluation of this film is shown in Table 1.
[0018]
Example 4
In Example 1 described above, the layer (B) was composed of 87.5 parts by weight of a linear low density polyethylene resin (“Moretech 0138”), a titanium oxide pigment masterbatch (manufactured by Nihongo Bix, “PO-0107 White”). 37.5 parts by weight and 5 parts by weight of reactor TPO (Montel, “Cataloy”) were blended, and (D) layer was added to 86 parts by weight of ethylene-vinyl acetate copolymer having a vinyl acetate content of 10% by weight. 15 parts by weight of an aluminum pigment masterbatch (manufactured by Sumitomo Color Co., Ltd., “SPEM-8K445 Silver”) is blended. 5 types and 5 layers of light-shielding agricultural polyolefin resin film were produced in the same manner as in Example 1, except that the thickness of each layer was 25 μm and the total thickness was 125 μm.
The evaluation of this film is shown in Table 1.
[0019]
Example 5
In Example 1, the layer (D) was prepared by adding 81.5 parts by weight of an ethylene-vinyl acetate copolymer having a vinyl acetate content of 5% by weight to an aluminum pigment master batch (“SPEM-8K445 Silver, manufactured by Sumitomo Color Co., Ltd.). ”) 17.5 parts by weight, 8 parts by weight of reactor TPO (Montel,“ Cataloy ”), and 2.5 parts by weight of the antifogging agent in the (D) layer and 1.5 parts in the (E) layer. Except for blending parts by weight, in the same manner as in Example 1, 5 types and 5 layers of light shielding polyolefin resin film for agricultural use were produced.
The evaluation of this film is shown in Table 1.
[0020]
[Table 1]
Example 6
In Example 1 described above, the layer (B) was composed of 87.5 parts by weight of a linear low density polyethylene resin (“Moretech 0138”), a titanium oxide pigment masterbatch (manufactured by Nihongo Bix, “PO-0107 White”). ) 37.5 parts by weight and 5 parts by weight of reactor TPO (Montel, “Cataloy”), and (C) layer was oxidized to 91.25 parts by weight of linear low density polyethylene resin (“Moretech 0138”). 6.25 parts by weight of titanium pigment masterbatch (manufactured by Nihongo Bix, "PO-0107 white") and 12.5 parts by weight of carbon black pigment masterbatch (manufactured by Toyo Ink, "TET-01337 black") , (D) layer is composed of 81.5 parts by weight of an ethylene-vinyl acetate copolymer having a vinyl acetate content of 10% by weight and an aluminum pigment masterbatch Color, “SPEM-8K445 Silver”) 13.75 parts by weight, Reactor TPO (Montell, “Cataloy”) 5 parts by weight, and 2.5 parts by weight of anti-fogging agent in layer (D) A five-layer, five-layer light-shielding agricultural polyolefin-based resin film was produced in the same manner as in Example 1 except that 1.5 parts by weight of the (E) layer was blended.
Table 2 shows the evaluation of this film.
[0022]
Example 7
In Example 1, the layer (B) was composed of 83.75 parts by weight of a linear low density polyethylene resin (“Moretech 0138”), a titanium oxide pigment master batch (manufactured by Nihongo Bix Co., Ltd., “PO-0107 White”). ) 56.25 parts by weight and 5 parts by weight of reactor TPO (Montel, “Cataloy”) are blended, and the (C) layer is oxidized to 91.25 parts by weight of linear low density polyethylene resin (“Moretech 0138”). 6.25 parts by weight of titanium pigment masterbatch (manufactured by Nihongo Bix, "PO-0107 white") and 12.5 parts by weight of carbon black pigment masterbatch (manufactured by Toyo Ink, "TET-01337 black") , (D) layer is composed of 77 parts by weight of an ethylene-vinyl acetate copolymer having a vinyl acetate content of 10% by weight, and an aluminum pigment masterbatch "SPEM-8K445 Silver" manufactured by Color Co., Ltd.) 25 parts by weight, Reactor TPO (Montel, "Cataloy") 8 parts by weight, and 2.5 parts by weight of anti-fogging agent in layer (D), E) A five-layer, five-layer, light-shielding polyolefin resin film for agricultural use was produced in the same manner as in Example 1 except that 1.5 parts by weight was added to the layer.
Table 2 shows the evaluation of this film.
[0023]
Comparative Example 1
In Example 1 described above, instead of the linear low density polyethylene resin used in the (A) layer, the (B) layer and the (C) layer, a high pressure method low density polyethylene resin (NUC-8133, manufactured by Nihon Unicar Company, Ltd.) was used. 5) A five-layer, light-shielding, polyolefin-based resin film for agricultural use was produced in the same manner as in Example 1, except that the change was made to “)”.
Table 2 shows the evaluation of this film.
[0024]
Comparative Example 2
Using a three-layer / three-layer inflation device, as a layer (B) from the outside, 91.25 parts by weight of a high-pressure low-density polyethylene resin (“NUC-8133”) is added to a titanium oxide pigment masterbatch (manufactured by Nihon Bix) , “PO-0907 White”) 43.75 parts by weight, and as layer (C), 100 parts by weight of a high-pressure low-density polyethylene resin (“NUC-8133”) is added to a titanium oxide pigment master batch (“PO- 0907 White ") 10 parts by weight and 20 parts by weight of carbon black pigment masterbatch (" TET-01337 Black "manufactured by Toyo Ink Co., Ltd.) are blended, and (D) layer is ethylene-acetic acid having a vinyl acetate content of 10% by weight. In 89.5 parts by weight of vinyl copolymer, an aluminum pigment master batch (manufactured by Sumitomo Color Co., Ltd., “SPEM-8K445 Silver”) 17.5 parts by weight are blended, and each layer is blended with 100 parts by weight of the resin component, 0.3 parts by weight of a hindered amine light stabilizer, and these are fed to each extruder, and each layer is about 27 μm, A three-layer, three-layer, light-shielding polyolefin-based resin film for agricultural use having a total thickness of 80 μm was produced.
Table 2 shows the evaluation of this film.
[0025]
Comparative Example 3
Using a three-layer, three-layer inflation device, as the (B) layer from the outside, 91.25 parts by weight of a linear low density polyethylene resin ("Moretech 0138") was added to a titanium oxide pigment master batch ("PO-0907 white"). ) 43.75 parts by weight, and as layer (C), 76 parts by weight of a linear low density polyethylene resin (“Moretech 0138”), 20 parts by weight of an aluminum pigment masterbatch (“SPEM-8K445 Silver”), carbon 20 parts by weight of a black pigment masterbatch (“TET-01337 black”) was blended, and as a layer (D), 89.5 parts by weight of a linear low density polyethylene resin (“Moretech 0138”) was added to an aluminum pigment masterbatch (“ SPEM-8K445 Silver ") 17.5 parts by weight, and each layer is a resin component Blending 0.3 parts by weight of a hindered amine light stabilizer with respect to 00 parts by weight, and supplying these to each extruder, a three-layer, three-layer, light-shielding agricultural polyolefin-based system with a thickness of about 27 μm and a total thickness of 80 μm A resin film was produced.
Table 2 shows the evaluation of this film.
[0026]
[Table 2]
【The invention's effect】
It is possible to provide a light-shielding polyolefin resin film for agricultural use having a five-layer structure which has excellent durability and film strength even when used for a long period of time and has excellent film strength.
Claims (6)
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| JP2001026409A JP4504576B2 (en) | 2000-12-22 | 2001-02-02 | Light-shielding polyolefin resin film for agriculture |
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| JP6883411B2 (en) * | 2016-11-29 | 2021-06-09 | 岩谷マテリアル株式会社 | Covering material for raising seedlings |
| CN112586248A (en) * | 2020-12-08 | 2021-04-02 | 山东森博斯特塑胶科技有限公司 | Long-service-life silver black mulching film and preparation method thereof |
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| JPS53139683A (en) * | 1977-05-11 | 1978-12-06 | Idearisaachi Yuugen | Plastic film |
| JPS6181736A (en) * | 1984-09-28 | 1986-04-25 | 三井化学株式会社 | Covering material |
| JPS61111350A (en) * | 1984-11-06 | 1986-05-29 | Mitsubishi Monsanto Chem Co | Light-screening agricultural film and production thereof |
| JPS62181721A (en) * | 1986-02-05 | 1987-08-10 | シ−アイ化成株式会社 | Light blocking agricultural film |
| JPH0655462B2 (en) * | 1986-09-25 | 1994-07-27 | 住友化学工業株式会社 | Laminated perforated film |
| JP3713512B2 (en) * | 1996-02-29 | 2005-11-09 | 日本ウェーブロック株式会社 | Blackout curtain material for horticulture |
| JP3127116B2 (en) * | 1996-03-05 | 2001-01-22 | みかど化工株式会社 | Agricultural film |
| JPH09298954A (en) * | 1996-05-16 | 1997-11-25 | Sekisui Chem Co Ltd | Agricultural film |
| JPH1177915A (en) * | 1997-09-09 | 1999-03-23 | C I Kasei Co Ltd | Agricultural polyolefin resin multilayer film |
| JP3681553B2 (en) * | 1997-09-26 | 2005-08-10 | 三善加工株式会社 | Olefin resin laminated film |
| JPH11235129A (en) * | 1998-02-24 | 1999-08-31 | Hagiwara Kogyo Kk | Agricultural and horticultural shading materials |
| JP2000319608A (en) * | 1999-05-12 | 2000-11-21 | Sekisui Chem Co Ltd | Adhesive sheet |
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