JPH10136801A - Light-shielding multi-film, method of spreading the same, and method of manufacturing the multi-film - Google Patents
Light-shielding multi-film, method of spreading the same, and method of manufacturing the multi-filmInfo
- Publication number
- JPH10136801A JPH10136801A JP8292737A JP29273796A JPH10136801A JP H10136801 A JPH10136801 A JP H10136801A JP 8292737 A JP8292737 A JP 8292737A JP 29273796 A JP29273796 A JP 29273796A JP H10136801 A JPH10136801 A JP H10136801A
- Authority
- JP
- Japan
- Prior art keywords
- film
- light
- shielding
- layer
- folded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 238000003892 spreading Methods 0.000 title abstract description 8
- 239000010410 layer Substances 0.000 claims description 38
- 241000607479 Yersinia pestis Species 0.000 claims description 31
- 230000002940 repellent Effects 0.000 claims description 23
- 239000005871 repellent Substances 0.000 claims description 23
- 230000000694 effects Effects 0.000 claims description 19
- 239000000049 pigment Substances 0.000 claims description 16
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- 229910052595 hematite Inorganic materials 0.000 claims description 4
- 239000011019 hematite Substances 0.000 claims description 4
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- 239000002356 single layer Substances 0.000 claims description 3
- 239000001038 titanium pigment Substances 0.000 claims description 2
- 239000002362 mulch Substances 0.000 claims 1
- 239000010408 film Substances 0.000 description 109
- 229920005989 resin Polymers 0.000 description 40
- 239000011347 resin Substances 0.000 description 40
- 229920000092 linear low density polyethylene Polymers 0.000 description 18
- 239000004707 linear low-density polyethylene Substances 0.000 description 18
- 239000006229 carbon black Substances 0.000 description 13
- 239000004594 Masterbatch (MB) Substances 0.000 description 10
- 238000001125 extrusion Methods 0.000 description 8
- 238000002834 transmittance Methods 0.000 description 8
- 239000000654 additive Substances 0.000 description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 230000000996 additive effect Effects 0.000 description 4
- 239000000077 insect repellent Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000001846 repelling effect Effects 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 241000963384 Zingiber mioga Species 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000001054 red pigment Substances 0.000 description 2
- 150000003609 titanium compounds Chemical class 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 241000234282 Allium Species 0.000 description 1
- 235000002732 Allium cepa var. cepa Nutrition 0.000 description 1
- 241001124076 Aphididae Species 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- -1 and the like Substances 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- AOWKSNWVBZGMTJ-UHFFFAOYSA-N calcium titanate Chemical compound [Ca+2].[O-][Ti]([O-])=O AOWKSNWVBZGMTJ-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002728 pyrethroid Substances 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Protection Of Plants (AREA)
- Laminated Bodies (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
(57)【要約】
【目的】茗荷等の高度な遮光を必要とする作物の栽培に
好適で、展張作業が極めて簡単な遮光性マルチフィルム
を提供すること。また、該遮光性マルチフィルムの展張
方法、及び、その製造方法を提供すること。
【構成】厚みが１５〜４０μｍで遮光層１１を少なくと
も一層有するフィルムを、幅が約１／２になるよう長さ
方向に平行に二つ折りしたことを特徴とする遮光性マル
チフィルム１を用いる。
(57) [Abstract] [Object] To provide a light-shielding multi-film suitable for cultivation of crops that require high light-shielding such as myogyo, and in which the spreading operation is extremely simple. Further, the present invention provides a method for spreading the light-shielding multi-film and a method for producing the same. A light-shielding multi-film 1 characterized in that a film having a thickness of 15 to 40 μm and having at least one light-shielding layer 11 is folded in parallel in the length direction so as to have a width of about ２.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、遮光性マルチフィルム
に関する。また、該遮光性マルチフィルムの展張方法、
及び、その製造方法に関する。The present invention relates to a light-shielding multi-film. Further, a method for spreading the light-shielding multi-film,
And its manufacturing method.
【０００２】[0002]
【従来の技術】近年、茗荷はピンク色のものが好まれて
いるが、根の部分に太陽光線が入射すると黒変してピン
ク色が出ず、商品価値が低下してしまう。そのため茗荷
の栽培には、地面に太陽光線が入らないよう遮光性マル
チフィルムが用いられている。従来は、この遮光性マル
チフィルムとして厚みが２０μｍ程度の黒色フィルムが
用いられていたが、十分な遮光性を得るために該フィル
ムを三枚程重ねてクリップ等で固定していた。しかしな
がら、マルチフィルムを三重掛けするには、狭いハウス
の中で、しかも幅が１〜２ｍという比較的広幅の薄いフ
ィルムを展張しなければならないため、作業が極めて煩
雑で重労働であった。2. Description of the Related Art In recent years, pink mygo has been preferred, but when sunlight is incident on the root portion, it turns black and does not come out in pink, and its commercial value is reduced. Therefore, in cultivation of myoga, a light-shielding multi-film is used to prevent sunlight from entering the ground. Conventionally, a black film having a thickness of about 20 μm has been used as the light-shielding multi-film. However, in order to obtain sufficient light-shielding properties, about three such films are stacked and fixed with clips or the like. However, in order to multiply the multi-film, a relatively wide and thin film having a width of 1 to 2 m has to be spread in a narrow house.
【０００３】そこで本発明者等はかかる重労働を軽減す
るために、２０μｍのフィルムを３枚重ねた場合と同等
の光線透過率を有する厚さ５０μｍのフィルムを、一枚
だけ展張して茗荷の栽培を試みた。しかしながら、得ら
れた茗荷は少し黒変して、ピンク色の高品質なものとは
ほど遠いものであった。In order to reduce such heavy labor, the present inventors have spread only one 50 μm-thick film having the same light transmittance as that obtained by stacking three 20 μm films, and cultivated myoga. Tried. However, the resulting myogy turned a little black, far from pink high quality.
【０００４】[0004]
【発明が解決しようとする課題】本発明が解決しようと
する課題は、茗荷等の高度な遮光を必要とする作物の栽
培に好適で、展張作業が極めて簡単な遮光性マルチフィ
ルムを提供することである。また、該遮光性マルチフィ
ルムの展張方法、及び、その製造方法を提供することで
ある。SUMMARY OF THE INVENTION An object of the present invention is to provide a light-shielding multi-film which is suitable for cultivation of crops requiring high light-shielding such as myogyo and which can be extremely easily spread. It is. Another object of the present invention is to provide a method for extending the light-shielding multi-film and a method for producing the same.
【０００５】[0005]
【課題を解決するための手段】本発明によると上記課題
を解決するための手段として、厚みが１５〜４０μｍで
遮光層１１を少なくとも一層有するフィルムを、幅が約
１／２になるよう長さ方向に平行に二つ折りしたことを
特徴とする遮光性マルチフィルム１が提供され、さら
に、前記フィルムが、少なくとも遮光層１１と害虫忌避
層１２を有する多層フィルムであり、該多層フィルムが
遮光層１１が内側になるよう長さ方向に平行に二つ折り
されていることを特徴とする前記遮光性マルチフィルム
１が提供され、さらにまた、前記害虫忌避層１２が、害
虫忌避効果を有していない部位１２１を、フィルム１の
長さ方向に平行に有していることを特徴とする前記遮光
性マルチフィルム１が提供され、さらにまた、前記害虫
忌避効果を有していない部位１２１が、二つ折りにして
いない状態のフィルムの幅の１／４〜３／４の幅である
ことを特徴とする前記遮光性マルチフィルム１が提供さ
れ、さらにまた、前記遮光層１１が黒色顔料を含有して
いることを特徴とする前記遮光性マルチフィルム１が提
供され、さらにまた、前記害虫忌避層１２が波長４００
ｎｍ未満に反射ピークを有するチタン系顔料、もしく
は、銀色顔料を含有していることを特徴とする前記遮光
性マルチフィルム１が提供され、さらにまた、前記害虫
効果を有していない部位１２１が、ヘマタイト、又は、
マグネタイトを含有していることを特徴とする前記遮光
性マルチフィルム１が提供され、さらにまた、前記遮光
性マルチフィルム１の折り返し部分１４を留め具２にて
固定することを特徴とする遮光性マルチフィルムの展張
方法が提供され、さらにまた、単層、又は、多層インフ
レーション法によりチューブ状のフィルムを製膜し、こ
れを扁平に折り畳んだ後、長さ方向と平行に切断するこ
とを特徴とする前記遮光性マルチフィルムの製造方法が
提供される。According to the present invention, as a means for solving the above-mentioned problems, a film having a thickness of 15 to 40 μm and having at least one light-shielding layer 11 has a length of about 幅. A light-shielding multi-film 1 characterized by being folded in two in the direction parallel to the direction is provided, and the film is a multilayer film having at least a light-shielding layer 11 and a pest repellent layer 12, wherein the multilayer film is a light-shielding layer 11 The light-shielding multi-film 1 is provided, wherein the light-shielding multi-film 1 is folded in two in the length direction so that the inside is inside, and further, the part where the pest repellent layer 12 does not have a pest repellent effect 121 is provided in parallel with the length direction of the film 1. The light-shielding multi-film 1 is provided, and further has the insect repellent effect. The light-shielding multi-film 1 is provided, wherein the light-shielding layer 11 has a width of 1/4 to 3/4 of the width of the film in a state where the film is not folded in half. The light-shielding multi-film 1 characterized by containing a black pigment is provided, and the pest repellent layer 12 has a wavelength of 400
The titanium-based pigment having a reflection peak less than nm, or the light-shielding multi-film 1 characterized by containing a silver pigment is provided, furthermore, the portion 121 having no pest effect, Hematite or
The light-shielding multi-film 1 comprising magnetite is provided, and the folded portion 14 of the light-shielding multi-film 1 is fixed with a fastener 2. A method for stretching a film is provided, and furthermore, a single-layer or, after forming a tubular film by a multilayer inflation method, folding it flat, and cutting in parallel to the length direction. A method for producing the light-shielding multi-film is provided.
【０００６】以下、本発明を図面に基づき更に詳しく説
明する。図１〜４は本発明による遮光性マルチフィルム
１の一実施例を表す断面図である。該遮光性マルチフィ
ルム１は、厚みが１５〜４０μｍのフィルムが二つ折り
された形状をしている。厚みが１５μｍ未満であるとフ
ィルムの腰が弱く展張しづらい上、二つ折りにしても遮
光性が十分でない。また４０μｍを越えるとフィルムの
腰が強くなりすぎて、前記した５０μｍの黒色フィルム
を用いた場合と同様、遮光性フィルムが地面の凹凸に追
従できず、地面とフィルムの間に大きな空間が生じて、
かえって遮光性が低下する。また、本発明の遮光性マル
チフィルム１は、通常のマルチフィルムに用いられてい
る樹脂原料と同様の樹脂原料をベース樹脂として用いる
ことができ、例えば、低密度ポリエチレン系樹脂、直鎖
状低密度ポリエチレン系樹脂、高密度ポリエチレン系樹
脂、エチレン−酢酸ビニル共重合体樹脂等の一種、或い
は複数種類をブレンドしたものを用いることができる。Hereinafter, the present invention will be described in more detail with reference to the drawings. 1 to 4 are cross-sectional views showing one embodiment of a light-shielding multi-film 1 according to the present invention. The light-shielding multi-film 1 has a shape in which a film having a thickness of 15 to 40 μm is folded in two. When the thickness is less than 15 μm, the film is weak and difficult to spread, and the light-shielding property is not sufficient even when folded in two. Also, if it exceeds 40 μm, the film becomes too strong, and the light-shielding film cannot follow the unevenness of the ground as in the case of using the above-mentioned 50 μm black film, and a large space is formed between the ground and the film. ,
On the contrary, the light-shielding property is reduced. In addition, the light-shielding multi-film 1 of the present invention can use, as a base resin, a resin material similar to the resin material used for a normal multi-film, for example, a low-density polyethylene resin, a linear low-density resin, One of a polyethylene resin, a high-density polyethylene resin, an ethylene-vinyl acetate copolymer resin, and the like, or a blend of a plurality of kinds can be used.
【０００７】更に、本発明による遮光性マルチフィルム
１は、光を遮る遮光層１１を有している。該遮光層１１
は、太陽光線を十分に遮蔽するために上述したベース樹
脂に各種添加剤を配合した組成物からなり、太陽光線を
十分に遮ることができれば該添加剤の種類は特に限定さ
れないが、添加量の割に遮光性能が良好で、安価である
黒色顔料、特にカーボンブラックを用いることが好まし
い。また、添加剤の量であるが、添加剤の種類やフィル
ムの層構成によっても異なるので一概には言えないが、
該フィルムの光線透過率を５％以下、好ましくは３％以
下にするために、添加量は０．２g/ｍ2以上にすること
が好ましい。また、添加量の上限は３．０g/ｍ2程度で
あり、３．０g/ｍ2を越えるとフィルム強度が低下する
恐れがある。Furthermore, the light-shielding multi-film 1 according to the present invention has a light-shielding layer 11 for shielding light. The light shielding layer 11
Is composed of a composition in which various additives are added to the above-described base resin in order to sufficiently shield sunlight, and the type of the additive is not particularly limited as long as it can sufficiently block sunlight, but the amount of the additive is not limited. It is preferable to use an inexpensive black pigment, especially carbon black, which has good light shielding performance and is inexpensive. Also, although it is the amount of the additive, it cannot be said unconditionally because it differs depending on the type of the additive and the layer configuration of the film,
In order to reduce the light transmittance of the film to 5% or less, preferably 3% or less, the amount added is preferably 0.2 g / m 2 or more. The upper limit of the amount added is about 3.0 g / m 2, and if it exceeds 3.0 g / m 2, the film strength may be reduced.
【０００８】本発明による遮光性マルチフィルム１は、
図１に示すように、遮光層１１のみからなる単層フィル
ムであってもよいが、図２に示すように、遮光層１１と
害虫忌避層１２を有する多層フィルムからなり、該害虫
忌避層１２が外側、遮光層１１が内側になるように二つ
折りされていると、高い遮光効果と同時に、害虫が忌避
できるので好ましい。また、害虫忌避層１２は害虫忌避
効果を有していればその組成は特に限定されず、例え
ば、前述したベース樹脂にピレスロイド系、エスピレン
系等の防虫剤を混入すれば良い。また、害虫が紫外線を
嫌う性質を利用して、防虫剤の代わりに波長４００ｎｍ
未満の光線反射率が高い顔料を混入した組成物を用いて
も良い。このような顔料としては経済性、加工性等の点
から、波長４００ｎｍ未満に反射ピークを有する、例え
ば、酸化チタン、チタン酸カリウム、チタン酸カルシウ
ム、チタン酸マグネシウム、チタン酸バリウム、チタン
酸ケイ酸アルミニウム等のチタン化合物の少なくとも一
種からなるチタン系顔料、もしくは、アルミニウム粉末
等の銀色顔料が好適である。これらの顔料は前記した防
虫剤のように人体に害を及ぼす恐れがないため、特に好
ましい。The light-shielding multi-film 1 according to the present invention comprises:
As shown in FIG. 1, a single-layer film consisting of only the light-shielding layer 11 may be used. However, as shown in FIG. 2, the film comprises a multilayer film having the light-shielding layer 11 and the pest-repelling layer 12. Is preferably folded inward so that the light-shielding layer 11 is on the inside and the light-shielding layer 11 is on the inside, because at the same time a high light-shielding effect can be obtained and pests can be repelled. The composition of the pest repellent layer 12 is not particularly limited as long as it has a pest repellent effect. For example, a pyrethroid-based or espirene-based insect repellent may be mixed into the above-described base resin. In addition, utilizing the property that pests dislike ultraviolet rays, instead of insect repellents, a wavelength of 400 nm is used.
A composition in which a pigment having a high light reflectance of less than 10% is mixed may be used. Such pigments have a reflection peak at a wavelength of less than 400 nm from the viewpoints of economy, processability, etc., for example, titanium oxide, potassium titanate, calcium titanate, magnesium titanate, barium titanate, and silicic acid titanate. Preference is given to titanium pigments comprising at least one titanium compound such as aluminum or silver pigments such as aluminum powder. These pigments are particularly preferable because they do not cause harm to the human body unlike the insect repellents described above.
【０００９】尚、この場合太陽光線を反射して害虫忌避
効果を発揮するのは、二つ折りされた害虫忌避層１２の
うち外側に位置する部分だけで、地面側に位置する部分
は効果を期待できない。従って、図３に示すように、害
虫忌避層１２のうち二つ折りにした際に地面側になる部
位を害虫忌避効果を有していない部位１２１としてもよ
い。ここで、害虫忌避効果を有していない部位１２１
は、害虫忌避効果を妨げないために、二つ折りにしてい
ない状態のフィルムの幅の１／４〜３／４程度の幅で、
フィルムを二つに折った際にその大部分が片側のみに存
在するようにする。また害虫忌避効果を有していない部
位１２１は、特に顔料を含有する必要はないが、赤色顔
料や黒色顔料等各種顔料を含有しても良い。特に、ヘマ
タイト系の赤色顔料やマグネタイト系の黒色顔料を配合
した場合は、遮光性が向上する上、その優れた燃焼促進
作用により廃棄する際の焼却処分が容易になる。In this case, only the portion of the folded pest repellent layer 12 which is reflected outside and exhibits the pest repelling effect is located outside, and the portion located on the ground side is expected to have an effect. Can not. Accordingly, as shown in FIG. 3, a part of the pest repellent layer 12 that is on the ground side when folded in two may be a part 121 having no pest repellent effect. Here, the part 121 having no pest repellent effect
Is a width of about 1/4 to 3/4 of the width of the unfolded film in order not to hinder the pest repelling effect,
When the film is folded in half, most of it is on one side only. Further, the portion 121 having no pest repellent effect does not need to particularly contain a pigment, but may contain various pigments such as a red pigment and a black pigment. In particular, when a hematite-based red pigment or a magnetite-based black pigment is blended, the light-shielding properties are improved, and the excellent combustion promoting action facilitates incineration when disposed.
【００１０】また、害虫忌避層１２に害虫忌避効果を有
していない部位１２１を設けると、継ぎ目１２２の強度
が低下しやすい。よって、図４に示すように、遮光性マ
ルチフィルム１の最外層に透明層１３を設けることが好
ましい。尚、害虫忌避効果を有していない部位１２１が
無い場合であっても、害虫忌避層にチタン系顔料や銀色
顔料を添加するとフィルムの耐候性が低下するため、こ
の場合も透明層１３を設けた方が好ましい。さらに本発
明による遮光性マルチフィルムの各層には、各層の性能
を低下させない程度に熱安定剤や耐候剤、滑剤、無機系
充填剤等の各種添加剤を添加することができる。When the pest repellent layer 12 is provided with a portion 121 having no pest repellent effect, the strength of the joint 122 tends to be reduced. Therefore, it is preferable to provide the transparent layer 13 as the outermost layer of the light-shielding multi-film 1 as shown in FIG. Even when there is no portion 121 having no pest repellent effect, the addition of a titanium-based pigment or a silver pigment to the pest repellent layer lowers the weather resistance of the film. Is preferred. Further, various additives such as a heat stabilizer, a weathering agent, a lubricant, and an inorganic filler can be added to each layer of the light-shielding multi-film according to the present invention so as not to deteriorate the performance of each layer.
【００１１】次に、図５に基づいて本発明による遮光性
フィルム１の展張方法を説明する。本発明による遮光性
フィルム１は折り返し部１４を留め具２にて作物の根元
近くに固定して、展張する。固定方法は特に限定されな
いが、例えば、あらかじめ作物の根元にクリップを取り
付けておき、該クリップによって遮光性フィルム１の折
り返し部１４を挟んで固定すると良い。尚、遮光性フィ
ルム１の折り返し部１４と反対側の、開放された部分１
５は必要に応じて地面に固定されるが、作物が茗荷の場
合はフィルムをめくって収穫するのが一般的であるため
開放された部分１５は固定されていない方が好ましい。
また、本発明による遮光性フィルム１は畝の片側にのみ
敷設しても良く、図５に示すように両側に敷設しても良
い。Next, a method of extending the light-shielding film 1 according to the present invention will be described with reference to FIG. In the light-shielding film 1 according to the present invention, the folded portion 14 is fixed near the root of the crop with the fastener 2 and is spread. The fixing method is not particularly limited. For example, it is preferable that a clip is attached to the root of the crop in advance and the folded portion 14 of the light-shielding film 1 is fixed by the clip. The open portion 1 on the opposite side of the folded portion 14 of the light-shielding film 1
5 is fixed to the ground as necessary, but it is preferable that the open portion 15 is not fixed because the crop is usually turned over and harvested when the crop is a myogy.
Further, the light-shielding film 1 according to the present invention may be laid on only one side of the ridge, or may be laid on both sides as shown in FIG.
【００１２】次に、本発明による遮光性フィルム１の製
造方法について図６を基に説明する。本発明による遮光
性フィルム１は、Ｔダイ押出成形法やインフレーション
押出成形法を用いて成形したフラットなフィルムを二つ
折りすることによっても得られるが、インフレーション
押出成形法によって得られるチューブ状のフィルムを、
扁平に折り畳んだ後、これを長さ方向と平行にカットす
ることによっても得られる。特に、幅方向の中線ｌでカ
ットすると、ロスが少なく同一のサイズのものが二丁取
りできる点で好ましい。Next, a method of manufacturing the light-shielding film 1 according to the present invention will be described with reference to FIG. The light-shielding film 1 according to the present invention can be obtained by folding a flat film formed using a T-die extrusion molding method or an inflation extrusion molding method into two. ,
It can also be obtained by folding it flat and cutting it parallel to its length. In particular, cutting at the center line 1 in the width direction is preferable in that two pieces of the same size can be taken with little loss.
【００１３】また、本発明による遮光性フィルムの展張
方法は茗荷以外に、軟白ネギ等の高度な遮光が必要とさ
れる作物の栽培にも応用できることは言うまでもない。Further, it goes without saying that the method for spreading a light-shielding film according to the present invention can be applied to cultivation of crops requiring high light-shielding, such as soft green onion, in addition to myogyo.
【００１４】[0014]
【実施例】次に本発明による遮光性マルチフィルムを実
施例を挙げて説明するが、本発明はこれに限定されるも
のではない。尚、それぞれの性能の測定は以下の方法で
行った。 （１）展張性 マルチフィルムを展張する作業が簡単であるか否かを、
作業者に判断してもらった。極めて簡単である場合は
○、煩雑であった場合は×で表中に記す。 （２）茗荷の色 ハウス内で遮光性マルチフィルムを展張して茗荷を栽培
し、得られた茗荷の色を目視にて観察した。 （３）害虫忌避効果 茗荷を収穫時に、茗荷の葉をランダムに１８枚選び、そ
れに付着している害虫（アブラムシ）の数を調べた。EXAMPLES Next, the light-shielding multi-film according to the present invention will be described with reference to examples, but the present invention is not limited to these examples. In addition, each performance was measured by the following method. (1) Extensibility Whether or not the work of extending the multi-film is easy,
We had the worker judge. In the table, ○ indicates extremely simple and × indicates complicated. (2) Color of Myogyo The Mygago was cultivated by spreading the light-shielding multi-film in the house, and the color of the obtained Myogyo was visually observed. (3) Pest repellent effect At the time of harvesting Myogashi, 18 leaves of Myogyo were randomly selected, and the number of insect pests (aphids) adhering thereto was examined.
【００１５】（実施例１）直鎖状低密度ポリエチレン樹
脂９１．４重量％、直鎖状低密度ポリエチレン樹脂にカ
ーボンブラックを４０重量％添加したカーボンブラック
マスターバッチ８．６重量％を混練し、インフレーショ
ン押出成形法にて、厚み２５μｍ、折幅２２００ｍｍの
チューブ状フィルムを製膜し、これを扁平に折り畳み、
更に幅方向の中線で二等分し、本発明による遮光性マル
チフィルムを得る。得られた遮光性マルチフィルムの可
視光線領域での平均光線透過率、及び、３９０ｎｍにお
ける光線反射率を表１に示す。遮光性マルチフィルムの
折り返し部分を茗荷の根元近くに止め、該マルチフィル
ムを展張し、２０日後に茗荷を収穫した。性能試験の結
果を表１に記す。Example 1 91.4% by weight of a linear low-density polyethylene resin and 8.6% by weight of a carbon black masterbatch obtained by adding 40% by weight of carbon black to a linear low-density polyethylene resin were kneaded. A tubular film having a thickness of 25 μm and a fold width of 2200 mm was formed by inflation extrusion molding, and this was folded flat.
Further, the light-shielding multi-film according to the present invention is obtained by bisecting at the center line in the width direction. Table 1 shows the average light transmittance in the visible light region and the light reflectance at 390 nm of the obtained light-shielding multi-film. The folded part of the light-shielding multi-film was stopped near the base of the myogy, the multi-film was spread, and the myogy was harvested 20 days later. Table 1 shows the results of the performance test.
【００１６】（実施例２）四台の押出機を用意し、一台
目の押出機には直鎖状低密度ポリエチレン樹脂を供給
し、二台目の押出機には直鎖状低密度ポリエチレン樹脂
６０重量％、直鎖状低密度ポリエチレン樹脂に３９０ｎ
ｍ付近に反射ピークを有する酸化チタンを６０重量％添
加したチタン系マスターバッチ４０重量％を供給し、三
台目、及び、四台目の押出機には直鎖状低密度ポリエチ
レン樹脂８０重量％、直鎖状低密度ポリエチレン樹脂に
カーボンブラックを４０重量％添加したカーボンブラッ
クマスターバッチ２０重量％を供給し、それぞれの樹脂
を一台目の押出機に供給した樹脂が最外層、二台目、及
び、三台目の樹脂が中間層、四台目の樹脂が最内層とな
るように、インフレーション配色共押出法にて、厚み２
５μｍ、折幅２２００ｍｍのチューブ状フィルムを成形
した。ここで、図６を基に実施例２で得られたフィルム
の層構成を説明すると、一台目の押出機に供給した樹脂
が図中番号１３、二台目の押出機に供給した樹脂が図中
番号１２、三台目の押出機に供給した樹脂が図中番号１
２１、四台目の押出機に供給した樹脂が図中番号１１に
あたる。また、二台目の押出機に供給した樹脂による図
中番号１２に相当する部分の幅は、約９００ｍｍであっ
た。これを扁平に折り畳み、更に幅方向の中央部で二等
分し、本発明による遮光性マルチフィルムを得る。得ら
れた遮光性マルチフィルムの可視光線領域での平均光線
透過率、及び、３９０ｎｍにおける光線反射率を表１に
示す。遮光性マルチフィルムの折り返し部分を茗荷の根
元近くに止め、該マルチフィルムを展張し、２０日後に
茗荷を収穫した。性能測定の結果を表１に記す。Example 2 Four extruders were prepared, the first extruder was supplied with a linear low-density polyethylene resin, and the second extruder was supplied with a linear low-density polyethylene resin. 60% by weight of resin, 390n in linear low density polyethylene resin
40% by weight of a titanium-based masterbatch to which 60% by weight of titanium oxide having a reflection peak near m is supplied, and 80% by weight of a linear low-density polyethylene resin is supplied to the third and fourth extruders. 20% by weight of a carbon black masterbatch obtained by adding 40% by weight of carbon black to a linear low-density polyethylene resin, and each resin is supplied to a first extruder. And a thickness of 2 mm by inflation color co-extrusion so that the third resin is the intermediate layer and the fourth resin is the innermost layer.
A 5 μm, 2200 mm folded tube-like film was formed. Here, the layer configuration of the film obtained in Example 2 will be described with reference to FIG. 6. The resin supplied to the first extruder is numbered 13 in the figure, and the resin supplied to the second extruder is No. 12 in the figure, the resin supplied to the third extruder is number 1 in the figure.
21, the resin supplied to the fourth extruder corresponds to number 11 in the figure. Further, the width of the portion corresponding to the number 12 in the figure by the resin supplied to the second extruder was about 900 mm. This is folded flat and further bisected at the center in the width direction to obtain a light-shielding multi-film according to the present invention. Table 1 shows the average light transmittance in the visible light region and the light reflectance at 390 nm of the obtained light-shielding multi-film. The folded part of the light-shielding multi-film was stopped near the base of the myogy, the multi-film was spread, and the myogy was harvested 20 days later. Table 1 shows the results of the performance measurement.
【００１７】（実施例３）四台の押出機を用意し、一台
目の押出機、二台目の押出機には実施例２と同様の樹脂
を供給し、三台目、四台目の押出機には、直鎖状低密度
ポリエチレン樹脂６５重量％、直鎖状低密度ポリエチレ
ン樹脂にマグネタイトを３０重量％添加したマスターバ
ッチ２０重量％、直鎖状低密度ポリエチレン樹脂にカー
ボンブラックを４０重量％添加したカーボンブラックマ
スターバッチ１５重量％を供給し、インフレーション配
色共押出法にて、実施例２と同様な構成で、厚み２５μ
ｍ、折幅２２００ｍｍのチューブ状フィルムを成形し
た。これを扁平に折り畳み、更に幅方向の中線で二等分
し、本発明による遮光性マルチフィルムを得る。得られ
た遮光性マルチフィルムの可視光線領域での平均光線透
過率、及び、３９０ｎｍにおける光線反射率を表１に示
す。遮光性マルチフィルムの折り返し部分を茗荷の根元
に止め、該マルチフィルムを展張し、２０日後に茗荷を
収穫した。性能測定の結果を表１に記す。(Example 3) Four extruders were prepared, and the same resin as in Example 2 was supplied to the first extruder and the second extruder. In the extruder, 65% by weight of a linear low-density polyethylene resin, 20% by weight of a master batch obtained by adding 30% by weight of magnetite to a linear low-density polyethylene resin, and 40% of carbon black by a linear low-density polyethylene resin 15% by weight of a carbon black master batch to which 25% by weight has been added is fed by an inflation color co-extrusion method, and has a thickness of 25 μ
m, a tubular film having a folded width of 2200 mm was formed. This is folded flat and further bisected at the midline in the width direction to obtain a light-shielding multi-film according to the present invention. Table 1 shows the average light transmittance in the visible light region and the light reflectance at 390 nm of the obtained light-shielding multi-film. The folded part of the light-shielding multi-film was fixed at the base of the myogy, the multi-film was spread, and the myogy was harvested 20 days later. Table 1 shows the results of the performance measurement.
【００１８】（実施例４）四台の押出機を用意し、一台
目の押出機、二台目の押出機には実施例２と同様の樹脂
を供給し、三台目の押出機には、直鎖状低密度ポリエチ
レン樹脂８０重量％、直鎖状低密度ポリエチレン樹脂に
ヘマタイトを５０重量％添加したマスターバッチ２０重
量％を供給し、四台目の押出機には、直鎖状低密度ポリ
エチレン樹脂６５重量％、直鎖状低密度ポリエチレン樹
脂にマグネタイトを３０重量％添加したマスターバッチ
２０重量％、直鎖状低密度ポリエチレン樹脂にカーボン
ブラックを４０重量％添加したカーボンブラックマスタ
ーバッチ１５重量％を供給し、インフレーション配色共
押出法にて、実施例２と同様な構成で、厚み２５μｍ、
折幅２２００ｍｍのチューブ状フィルムを成形した。こ
れを扁平に折り畳み、更に幅方向の中線で二等分し、本
発明による遮光性マルチフィルムを得る。得られた遮光
性マルチフィルムの可視光線領域での平均光線透過率、
及び、３９０ｎｍにおける光線反射率を表１に示す。遮
光性マルチフィルムの折り返し部分を茗荷の根元近くに
止め、該マルチフィルムを展張し、２０日後に茗荷を収
穫した。性能測定の結果を表１に記す。(Example 4) Four extruders were prepared, and the same resin as in Example 2 was supplied to the first extruder and the second extruder, and the same resin was supplied to the third extruder. Supplies 80% by weight of a linear low-density polyethylene resin and 20% by weight of a masterbatch obtained by adding 50% by weight of hematite to a linear low-density polyethylene resin. 65% by weight of a high-density polyethylene resin, 20% by weight of a masterbatch obtained by adding 30% by weight of magnetite to a linear low-density polyethylene resin, and 15% by weight of a carbon black masterbatch obtained by adding 40% by weight of carbon black to a linear low-density polyethylene resin %, And the composition is the same as that of Example 2 by the inflation color co-extrusion method, and the thickness is 25 μm.
A tubular film having a folded width of 2200 mm was formed. This is folded flat and further bisected at the midline in the width direction to obtain a light-shielding multi-film according to the present invention. Average light transmittance in the visible light region of the obtained light-shielding multi-film,
Table 1 shows the light reflectance at 390 nm. The folded part of the light-shielding multi-film was stopped near the base of the myogy, the multi-film was spread, and the myogy was harvested 20 days later. Table 1 shows the results of the performance measurement.
【００１９】（比較例１）直鎖状低密度ポリエチレン樹
脂９１．４重量％、直鎖状低密度ポリエチレン樹脂にカ
ーボンブラックを４０重量％添加したカーボンブラック
マスターバッチ８．６重量％を混練し、インフレーショ
ン押出成形法にて、厚み５０μｍ、折幅２２００ｍｍの
チューブ状フィルムを製膜し、扁平に折った際の折り返
し部分（所謂、耳の部分）、及び、幅方向の中線をカッ
トし、厚み５０μｍの折り返されていないフラットなフ
ィルムを得る。得られたフィルムの可視光線領域での平
均光線透過率、及び、３９０ｎｍにおける光線反射率を
表１に示す。得られたフィルムの一端を茗荷の根元近く
に止め、２０日後に茗荷を収穫した。性能測定の結果を
表１に記す。(Comparative Example 1) 91.4% by weight of a linear low-density polyethylene resin and 8.6% by weight of a carbon black masterbatch obtained by adding 40% by weight of carbon black to a linear low-density polyethylene resin were kneaded. A tubular film having a thickness of 50 μm and a fold width of 2200 mm is formed by inflation extrusion molding, and the folded portion (so-called ear portion) when folded flat and the center line in the width direction are cut, and the thickness is reduced. A 50 μm unfolded flat film is obtained. Table 1 shows the average light transmittance in the visible light region and the light reflectance at 390 nm of the obtained film. One end of the obtained film was stopped near the base of the myogy, and the myogy was harvested 20 days later. Table 1 shows the results of the performance measurement.
【００２０】（比較例２）直鎖状低密度ポリエチレン樹
脂９１．４重量％、直鎖状低密度ポリエチレン樹脂にカ
ーボンブラックを４０重量％添加したカーボンブラック
マスターバッチ８．６重量％を混練し、インフレーショ
ン押出成形法にて、厚み２０μｍ、折幅２２００ｍｍの
チューブ状フィルムを製膜し、扁平に折った際の折り返
し部分（所謂、耳の部分）、及び、幅方向の中線をカッ
トし、厚み２０μｍの折り返されていないフラットなフ
ィルムを得る。得られたフィルムの可視光線領域での平
均光線透過率、及び、３９０ｎｍにおける光線反射率を
表１に示す。得られたフィルムを三枚重ね合わせなが
ら、端部を茗荷の根元近くに止め、フィルムを展張し、
２０日後経過したところで茗荷を収穫した。性能測定の
結果を表１に記す。(Comparative Example 2) 91.4% by weight of a linear low-density polyethylene resin and 8.6% by weight of a carbon black masterbatch obtained by adding 40% by weight of carbon black to a linear low-density polyethylene resin were kneaded. A tubular film having a thickness of 20 μm and a fold width of 2200 mm is formed by inflation extrusion molding, and the folded portion (so-called ear portion) when folded flat and the center line in the width direction are cut, and the thickness is reduced. A 20 μm unfolded flat film is obtained. Table 1 shows the average light transmittance in the visible light region and the light reflectance at 390 nm of the obtained film. While stacking the three obtained films, stop the end near the base of Myogaku, spread the film,
After 20 days, the myogy was harvested. Table 1 shows the results of the performance measurement.
【００２１】[0021]
【表１】 [Table 1]
【００２２】本発明による遮光性マルチフィルムは（実
施例１〜４）は極めて良好な展張性と、茗荷の黒変防止
効果を兼備していた。また、３９０ｎｍにおける光線反
射の高いフィルム（実施例２〜４）は、害虫忌避の効果
を示した。The light-shielding multi-films according to the present invention (Examples 1 to 4) had both excellent spreadability and an effect of preventing blackening of Myogaku. Moreover, the film with high light reflection at 390 nm (Examples 2 to 4) showed an effect of repelling pests.
【００２３】[0023]
【効果】本発明の遮光性マルチフィルムは、フィルムを
多数重ねながら展張していた従来のマルチフィルムと同
様の遮光機能を有し、加えて展張作業が極めて簡単であ
る。また、該遮光性マルチフィルムを多層フィルム構造
とし、チタン化合物やアルミ粉末などを含有した害虫忌
避層を設けると遮光性と同時に害虫忌避効果も兼備させ
ることができる。The light-shielding multi-film of the present invention has a light-shielding function similar to that of a conventional multi-film in which a large number of films are spread, and the spreading operation is extremely simple. When the light-shielding multi-film has a multilayer film structure and is provided with a pest-repelling layer containing a titanium compound, aluminum powder, and the like, the light-shielding property and the pest-repelling effect can be provided simultaneously.
【図１】本発明による遮光性マルチフィルムの一実施例
を表す断面図である。FIG. 1 is a cross-sectional view illustrating an embodiment of a light-shielding multi-film according to the present invention.
【図２】本発明による遮光性マルチフィルムの一実施例
を表す断面図である。FIG. 2 is a cross-sectional view illustrating an embodiment of a light-shielding multi-film according to the present invention.
【図３】本発明による遮光性マルチフィルムの一実施例
を表す断面図である。FIG. 3 is a sectional view illustrating an embodiment of a light-shielding multi-film according to the present invention.
【図４】本発明による遮光性マルチフィルムの一実施例
を表す断面図である。FIG. 4 is a cross-sectional view illustrating an embodiment of a light-shielding multi-film according to the present invention.
【図５】本発明による遮光性マルチフィルムの展張方法
を表す説明図である。FIG. 5 is an explanatory view showing a method for spreading a light-shielding multi-film according to the present invention.
【図６】本発明による遮光性マルチフィルムの製造方法
を表す説明図である。FIG. 6 is an explanatory view illustrating a method for producing a light-shielding multi-film according to the present invention.
１ 遮光性マルチフィルム １１ 遮光層 １２ 害虫忌避層 １２１ 害虫忌避効果を有していない部位 １２２ 継ぎ目 １３ 透明層 １４ 折り返し部 １５ 開放された部分 ２ 留め具 REFERENCE SIGNS LIST 1 light-shielding multi-film 11 light-shielding layer 12 pest repellent layer 121 part having no pest repellent effect 122 seam 13 transparent layer 14 folded part 15 open part 2 fastener
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ２９Ｃ 47/14 Ｂ２９Ｃ 47/14 Ｂ２９Ｋ 23:00 Ｂ２９Ｌ 7:00 9:00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI B29C 47/14 B29C 47/14 B29K 23:00 B29L 7:00 9:00
Claims (9)
なくとも一層有するフィルムを、幅が約１／２になるよ
う長さ方向に平行に二つ折りしたことを特徴とする遮光
性マルチフィルム１。1. A light-shielding multi-film 1 wherein a film having a thickness of 15 to 40 μm and having at least one light-shielding layer 11 is folded in parallel in the length direction so as to have a width of about １ ／.
と害虫忌避層１２を有する多層フィルムであり、該多層
フィルムが遮光層１１が内側になるよう長さ方向に平行
に二つ折りされていることを特徴とする請求項１記載の
遮光性マルチフィルム１。2. The method according to claim 1, wherein the film comprises at least a light-shielding layer.
And a pest repellent layer 12. The light-shielding multi-film 1 according to claim 1, wherein the multilayer film is folded in two in the length direction so that the light-shielding layer 11 is inside. .
有していない部位１２１を、フィルム１の長さ方向に平
行に有していることを特徴とする請求項２記載の遮光性
マルチフィルム１。3. The light-shielding mulch according to claim 2, wherein the pest repellent layer 12 has a portion 121 having no pest repellent effect in parallel to the length direction of the film 1. Film 1.
２１が、二つ折りにしていない状態のフィルムの幅の１
／４〜３／４の幅であることを特徴とする請求項３記載
の遮光性マルチフィルム１。4. The part 1 having no pest repellent effect
21 is the width of the unfolded film 1
The light-shielding multi-film 1 according to claim 3, wherein the width is ４ to ４.
ることを特徴とする請求項１乃至４のいずれかに記載の
遮光性マルチフィルム１。5. The light-shielding multi-film 1 according to claim 1, wherein the light-shielding layer 11 contains a black pigment.
満に反射ピークを有するチタン系顔料、もしくは、銀色
顔料を含有していることを特徴とする請求項２乃至５の
いずれかに記載の遮光性マルチフィルム１。6. The light-shielding property according to claim 2, wherein the pest repellent layer 12 contains a titanium pigment having a reflection peak at a wavelength of less than 400 nm or a silver pigment. Multi film 1.
が、ヘマタイト、又は、マグネタイトを含有しているこ
とを特徴とする請求項３乃至６のいずれかに記載の遮光
性マルチフィルム１。7. The part 121 having no pest effect
7. The light-shielding multi-film 1 according to claim 3, wherein the film contains hematite or magnetite.
マルチフィルム１の折り返し部分１４を留め具２にて固
定することを特徴とする遮光性マルチフィルムの展張方
法。8. A method for extending a light-shielding multi-film, comprising fixing the folded portion 14 of the light-shielding multi-film 1 according to claim 1 with a fastener 2.
よりチューブ状のフィルムを製膜し、これを扁平に折り
畳んだ後、長さ方向と平行に切断することを特徴とする
請求項１乃至７の何れかに記載の遮光性マルチフィルム
の製造方法。9. The method according to claim 1, wherein a tube-like film is formed by a single-layer or multilayer inflation method, which is folded flat and then cut in parallel with the length direction. A method for producing a light-shielding multi-film according to any one of the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8292737A JPH10136801A (en) | 1996-11-05 | 1996-11-05 | Light-shielding multi-film, method of spreading the same, and method of manufacturing the multi-film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8292737A JPH10136801A (en) | 1996-11-05 | 1996-11-05 | Light-shielding multi-film, method of spreading the same, and method of manufacturing the multi-film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10136801A true JPH10136801A (en) | 1998-05-26 |
Family
ID=17785680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8292737A Pending JPH10136801A (en) | 1996-11-05 | 1996-11-05 | Light-shielding multi-film, method of spreading the same, and method of manufacturing the multi-film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10136801A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002187188A (en) * | 2000-12-21 | 2002-07-02 | Toppan Printing Co Ltd | Clean film and packaging bag |
| KR100360122B1 (en) * | 2000-09-14 | 2002-11-07 | 대한민국(서울대학교 총장) | Polyethylene Mulching Film Having Insecticidal And Weeding Effect |
| JP2003038046A (en) * | 2001-07-27 | 2003-02-12 | Mikado Kako Kk | Agricultural multi-film |
| JP2006149338A (en) * | 2004-12-01 | 2006-06-15 | Mikado Kako Kk | Agricultural multi-film |
| GR20050100476A (en) * | 2005-09-19 | 2007-04-25 | Πλαστικα Κρητης Αβεε | Machine direction oriented mulching film |
-
1996
- 1996-11-05 JP JP8292737A patent/JPH10136801A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100360122B1 (en) * | 2000-09-14 | 2002-11-07 | 대한민국(서울대학교 총장) | Polyethylene Mulching Film Having Insecticidal And Weeding Effect |
| JP2002187188A (en) * | 2000-12-21 | 2002-07-02 | Toppan Printing Co Ltd | Clean film and packaging bag |
| JP2003038046A (en) * | 2001-07-27 | 2003-02-12 | Mikado Kako Kk | Agricultural multi-film |
| JP2006149338A (en) * | 2004-12-01 | 2006-06-15 | Mikado Kako Kk | Agricultural multi-film |
| GR20050100476A (en) * | 2005-09-19 | 2007-04-25 | Πλαστικα Κρητης Αβεε | Machine direction oriented mulching film |
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