JP4534314B2 - Multilayer film and outer film for photo-curing FRP - Google Patents
Multilayer film and outer film for photo-curing FRP Download PDFInfo
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- JP4534314B2 JP4534314B2 JP2000202357A JP2000202357A JP4534314B2 JP 4534314 B2 JP4534314 B2 JP 4534314B2 JP 2000202357 A JP2000202357 A JP 2000202357A JP 2000202357 A JP2000202357 A JP 2000202357A JP 4534314 B2 JP4534314 B2 JP 4534314B2
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Description
【０００１】
【発明の属する技術分野】
本発明は、光硬化方式による下水道管補修用材料のアウターフィルム（遮光フィルム）に使用される分野において、遮光性、スチレンガス遮断性、機械的強度、シール性に優れた多層フィルムに関するものである。
【０００２】
【従来の技術】
下水道管等の補修方法として、ＦＲＰのＵＶ硬化を利用する方式が行われている。補修用材料は、インナーフィルム／ＦＲＰプリプレグ／アウターフィルムからなり、チューブ状のインナーフィルムにＦＲＰを巻き付け、更にアウターフィルムでヒートシールして作られる。ＦＲＰプリプレグは、樹脂成分としてビニルエステル系樹脂、架橋剤、スチレン等を含む。
補修作業は、下水道管等の破損部分付近の下水道管内に補修材料をセットし、空気圧により膨らませ拡径し既設管に押しつけ、この状態で内側からＵＶ照射ランプを走らせＦＲＰを硬化させ、その後インナーチューブフィルムのみ抜き取ることで行う。
補修作業に際して、セット時にアウターフィルムの遮光性が劣ると、太陽光等の外側からの光によりＦＲＰが硬化する不具合が発生して、好ましくなかった。また、ＦＲＰを硬化させた時の反応熱によりスチレンガスが発生し、作業環境上好ましくなかった。
【０００３】
【発明が解決しようとする課題】
本発明は、従来の多層フィルムでは遮光性、スチレン遮断性が不十分であったものに対し、より遮光性、スチレン遮断性の優れた多層フィルムを提供するものである。
【０００４】
【課題を解決するための手段】
本発明は、（Ａ）厚みが１０〜２００μｍのナイロンからなる層、（Ｂ）エチレン、プロピレンから選ばれたαオレフィン共重合または多元共重合からなる軟質ポリオレフィンの層、エチレンとアクリル酸エステルまたはメタクリル酸エステルの共重合体、及びそれらの部分イオン架橋物から選ばれた共重合体からなる軟質ポリオレフィンの層、又はそれらの軟質ポリオレフィンの混合物からなる層、（Ｃ）エチレンビニルアルコール共重合樹脂からなる層を、Ａ−Ｂ、又はＡ−Ｂ−Ｃの順に積層し、かつ遮光性を有している層フィルムである。
好ましい実施形態としては、（Ｂ）層が顔料を含有しており、（Ｂ）層が紫外線吸収剤及び光安定剤を含有している前記多層フィルムである。
別の好ましい実施形態としては、最外層及び／又は最内層に印刷層を有する前記多層フィルムである。
又本発明は、前記多層フィルムを使用した光硬化ＦＲＰ用アウターフィルムである。
【０００５】
【発明の実施の形態】
本発明の多層フィルムの（Ａ）層に使用するナイロンは、６，６ナイロン、６−６６ナイロン、６−ナイロン、６，１０−ナイロン、７−ナイロン、１１−ナイロン、非晶性ナイロン等が挙げられ、強度を保つために必要である。
ナイロン層の厚みは、１０〜２００μｍであることが必要である。１０μｍ未満では、機械的強度が低くなり、又スチレン遮断性も悪くなる。２００μｍを越えると成形性が悪くなる。
【０００６】
本発明の多層フィルムの（Ｂ）層に使用する軟質ポリオレフィンは、エチレン、プロピレンから選ばれたαオレフィン共重合または多元共重合からなる軟質ポリオレフィン、エチレンとアクリル酸エステルまたはメタクリル酸エステルの共重合体、及びそれらの部分イオン架橋物から選ばれた共重合体からなる軟質ポリオレフィン、又はそれらの軟質ポリオレフィンの混合物であり、強度、伸び、シール性を保つために必要である。好ましくはポリエチレンである。
【０００７】
本発明の多層フィルムの（Ｃ）層に使用するエチレン・ビニルアルコール共重合樹脂（ＥＶＯＨ）は、エチレン含有量が２０〜６０モル％のものを使用するのが好ましい。２０％未満だと成形性が悪く、６０％を越えるとスチレン遮断性が悪くなる。
エチレン・ビニルアルコール共重合樹脂の厚みは、１〜１００μｍであることが好ましい。１μｍ未満だとスチレン遮断性が悪く、１００μｍを越えると吸湿により発泡する。
【０００８】
本発明の多層フィルムは、Ａ−Ｂ、又はＡ−Ｂ−Ｃの順に積層される。Ａ−Ｂ−ＣのようにＣ層があるほうが、よりスチレン遮断性が優れている。
【０００９】
本発明に使用する顔料は、赤、燈、黄、緑系等の光遮断性が優れたものが好ましく、更に好ましくは赤、燈、黄色系である。赤色はポリアゾ、ジメチルキナクリドン等、黄色はポリアゾ、モノアゾ、イソインドリノン等が挙げられる。顔料の添加量は特に規定しない。
【００１０】
本発明に使用する紫外線吸収剤は、ベンゾトリアゾール系、ベンゾフェノン系、ベンゾエート系等が挙げられる。その添加量は特に規定しない。
【００１１】
本発明に使用する光安定剤は、セバーケート系等が挙げられる。その添加量は特に規定しない。
【００１２】
本発明に使用する印刷層は、赤、燈、黄、緑、黒色系等の光遮断性が良い印刷インキからなり、好ましくは赤、燈、黄色系である。赤色はポリアゾ、ジメチルキナクリドン等、黄色はポリアゾ、モノアゾ、イソインドリノン等である。印刷の塗布量は特に規定しない。印刷層は多層フィルムの最外層及び／又は最内層に形成される。
【００１３】
【実施例】
以下に実施例によって本発明を更に詳細に説明するが、本発明はこれら実施例に限定されるものではない。実施例及び比較例において配合した成分は、以下の通りである。
・ナイロン ；６−６，６ＮＹ（宇部興産（株）製）
・ポリエチレン；ＬＤＰＥ（住友化学（株）製）
・ＥＶＯＨ ；エチレン・ビニルアルコール共重合樹脂（エチレン含有３２モル％、クラレ（株）製）
・黄色顔料ＭＢ；ポリアゾ含有量２０％（大日精化（株）製）
・赤色顔料ＭＢ；ポリアゾ含有量２０％（大日精化（株）製）
・紫外線吸収剤ＭＢ；紫外線吸収剤含有量１０％
・光安定剤ＭＢ；光安定剤含有量１０％
・赤色インキ ；ポリアゾ（大日精化（株）製）
・黄色インキ ；ポリアゾ（大日精化（株）製）
【００１４】
＜実施例及び比較例＞
多層フィルムは、押出機にそれぞれの樹脂を供給し、ダイス内で積層一体化して作成した。各層の厚みを表中に示した。各顔料ＭＢ（マスターバッチ）、紫外線吸収剤ＭＢ、及び光安定剤ＭＢは、ポリエチレン層に表中の配合量を添加した。なお、印刷は、ナイロン面にグラビアロールにて表中の厚みで行った。
【００１５】
以下に評価項目と評価条件を示す。
（１）機械的強度：ＪＩＳ Ｚ−１７０２に準拠。
○：引張強度 ２５ＭＰａ以上
×：引張強度 ２５ＭＰａ未満
（２）スチレン遮断性：ＦＲＰをアウターフィルムで覆い、光硬化させて、そのときのスチレンガス量を測定する。
○：スチレン透過性 ２０ｐｐｍ未満
×：スチレン透過性 ２０ｐｐｍ以上
（３）光遮断性：ＦＲＰをアウターフィルムで覆い、光硬化させて、ＦＲＰが硬化するまでの時間を測定する。
○：硬化までの時間 ４０分以上
×：硬化までの時間 ４０分未満
これらの結果を表１〜３に示した。
【００１６】
【表１】
【表２】
【表３】
【発明の効果】
本発明によれば、遮光性、スチレンガス遮断性、機械的強度、及びシール性が優れた多層フィルムを提供できるようになった。特に下水道管ＦＲＰの補修作業に際して使用されるアウターフィルム用として最適である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a multilayer film excellent in light-shielding property, styrene gas barrier property, mechanical strength, and sealing property in the field used for an outer film (light-shielding film) of a material for repairing sewer pipes by a photocuring method. .
[0002]
[Prior art]
As a method for repairing sewer pipes, a method using UV curing of FRP is performed. The repair material consists of an inner film / FRP prepreg / outer film, and is made by winding FRP around a tubular inner film and then heat-sealing with an outer film. The FRP prepreg contains a vinyl ester resin, a crosslinking agent, styrene and the like as a resin component.
For repair work, set the repair material in the sewer pipe near the damaged part of the sewer pipe, etc., inflate by air pressure, expand the diameter, press against the existing pipe, run the UV irradiation lamp from the inside in this state, cure the FRP, and then the inner tube This is done by extracting only the film.
In the repair work, if the light shielding property of the outer film is inferior at the time of setting, a problem that FRP is cured by light from the outside such as sunlight is not preferable. Further, styrene gas is generated by reaction heat when FRP is cured, which is not preferable in terms of working environment.
[0003]
[Problems to be solved by the invention]
The present invention provides a multilayer film having better light-shielding properties and styrene-blocking properties than conventional multilayer films having insufficient light-shielding properties and styrene-blocking properties.
[0004]
[Means for Solving the Problems]
The present invention includes (A) a layer made of nylon having a thickness of 10 to 200 μm, (B) a layer of soft polyolefin made of α-olefin copolymer or multi-component copolymer selected from ethylene and propylene, ethylene and acrylate or methacryl A layer of a soft polyolefin made of a copolymer of acid esters and a copolymer selected from those partially ionically crosslinked products, or a layer made of a mixture of these soft polyolefins, and (C) made of an ethylene vinyl alcohol copolymer resin It is a layer film in which layers are laminated in the order of A-B or A-B-C and have a light shielding property.
In a preferred embodiment, the multilayer film includes a layer (B) containing a pigment and a layer (B) containing an ultraviolet absorber and a light stabilizer.
In another preferred embodiment, the multilayer film has a printed layer as an outermost layer and / or an innermost layer.
Moreover, this invention is the outer film for photocuring FRP which uses the said multilayer film.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The nylon used for the (A) layer of the multilayer film of the present invention is 6,6 nylon, 6-66 nylon, 6-nylon, 6,10-nylon, 7-nylon, 11-nylon, amorphous nylon, etc. Listed and necessary to maintain strength.
The nylon layer needs to have a thickness of 10 to 200 μm. If it is less than 10 μm, the mechanical strength is lowered and the styrene barrier property is also deteriorated. If it exceeds 200 μm, the moldability becomes worse.
[0006]
The soft polyolefin used for the layer (B) of the multilayer film of the present invention is a soft polyolefin comprising an α-olefin copolymer or a multi-component copolymer selected from ethylene and propylene, a copolymer of ethylene and an acrylate ester or a methacrylate ester And a soft polyolefin comprising a copolymer selected from those partially ionically crosslinked products, or a mixture of these soft polyolefins, and is necessary for maintaining strength, elongation, and sealability. Polyethylene is preferable.
[0007]
The ethylene / vinyl alcohol copolymer resin (EVOH) used for the (C) layer of the multilayer film of the present invention preferably has an ethylene content of 20 to 60 mol%. If it is less than 20%, the moldability is poor, and if it exceeds 60%, the styrene barrier property is deteriorated.
The thickness of the ethylene / vinyl alcohol copolymer resin is preferably 1 to 100 μm. If it is less than 1 μm, the styrene barrier property is poor, and if it exceeds 100 μm, foaming occurs due to moisture absorption.
[0008]
The multilayer film of the present invention is laminated in the order of A-B or A-B-C. The presence of the C layer, such as A-B-C, is more excellent in styrene barrier properties.
[0009]
The pigments used in the present invention are preferably those having excellent light blocking properties such as red, amber, yellow and green, and more preferably red, amber and yellow. Examples of red include polyazo and dimethylquinacridone, and examples of yellow include polyazo, monoazo, and isoindolinone. The amount of pigment added is not particularly specified.
[0010]
Examples of the ultraviolet absorber used in the present invention include benzotriazole series, benzophenone series, and benzoate series. The amount added is not particularly specified.
[0011]
Examples of the light stabilizer used in the present invention include a sebacate system. The amount added is not particularly specified.
[0012]
The printing layer used in the present invention is made of a printing ink having good light blocking properties such as red, yellow, yellow, green, and black, and is preferably red, yellow, and yellow. Red is polyazo, dimethylquinacridone and the like, and yellow is polyazo, monoazo, isoindolinone and the like. The amount of printing applied is not specified. The printing layer is formed on the outermost layer and / or the innermost layer of the multilayer film.
[0013]
【Example】
The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples. The components blended in Examples and Comparative Examples are as follows.
・ Nylon; 6-6, 6NY (manufactured by Ube Industries)
・ Polyethylene; LDPE (manufactured by Sumitomo Chemical Co., Ltd.)
EVOH; ethylene / vinyl alcohol copolymer resin (ethylene-containing 32 mol%, manufactured by Kuraray Co., Ltd.)
-Yellow pigment MB: 20% polyazo content (manufactured by Dainichi Seika Co., Ltd.)
-Red pigment MB: 20% polyazo content (manufactured by Dainichi Seika Co., Ltd.)
・ UV absorber MB: UV absorber content 10%
-Light stabilizer MB: 10% light stabilizer content
・ Red ink: Polyazo (manufactured by Dainichi Seika Co., Ltd.)
・ Yellow ink: Polyazo (manufactured by Dainichi Seika Co., Ltd.)
[0014]
<Examples and Comparative Examples>
The multilayer film was prepared by supplying each resin to an extruder and laminating and integrating them in a die. The thickness of each layer is shown in the table. Each pigment MB (masterbatch), ultraviolet absorber MB, and light stabilizer MB were added in the amounts shown in the table to the polyethylene layer. In addition, printing was performed by the thickness in the table | surface with the gravure roll on the nylon surface.
[0015]
The evaluation items and evaluation conditions are shown below.
(1) Mechanical strength: Conforms to JIS Z-1702.
○: Tensile strength 25 MPa or more x: Tensile strength Less than 25 MPa (2) Styrene barrier property: FRP is covered with an outer film, photocured, and the amount of styrene gas at that time is measured.
○: Styrene permeability Less than 20 ppm x: Styrene permeability 20 ppm or more (3) Light blocking property: FRP is covered with an outer film, photocured, and the time until FRP is cured is measured.
○: Time until curing 40 minutes or more ×: Time until curing Less than 40 minutes These results are shown in Tables 1 to 3.
[0016]
[Table 1]
[Table 2]
[Table 3]
【The invention's effect】
According to the present invention, it has become possible to provide a multilayer film having excellent light shielding properties, styrene gas barrier properties, mechanical strength, and sealing properties. In particular, it is most suitable for an outer film used for repair work of a sewer pipe FRP.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000202357A JP4534314B2 (en) | 2000-07-04 | 2000-07-04 | Multilayer film and outer film for photo-curing FRP |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000202357A JP4534314B2 (en) | 2000-07-04 | 2000-07-04 | Multilayer film and outer film for photo-curing FRP |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002019048A JP2002019048A (en) | 2002-01-22 |
| JP4534314B2 true JP4534314B2 (en) | 2010-09-01 |
Family
ID=18699891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000202357A Expired - Fee Related JP4534314B2 (en) | 2000-07-04 | 2000-07-04 | Multilayer film and outer film for photo-curing FRP |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4534314B2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63135243A (en) * | 1986-11-14 | 1988-06-07 | ビーシーエル リミテッド | Multilayer carrier film |
| JPH01320160A (en) * | 1988-05-17 | 1989-12-26 | Courtaulds Films & Packaging Holdings Ltd | High molecular film |
| JPH0695303A (en) * | 1992-09-16 | 1994-04-08 | Fuji Photo Film Co Ltd | Packing material for photographic sensitive material |
| JPH0976419A (en) * | 1995-09-20 | 1997-03-25 | Sumitomo Bakelite Co Ltd | Multilaered film or sheet and production thereof |
-
2000
- 2000-07-04 JP JP2000202357A patent/JP4534314B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63135243A (en) * | 1986-11-14 | 1988-06-07 | ビーシーエル リミテッド | Multilayer carrier film |
| JPH01320160A (en) * | 1988-05-17 | 1989-12-26 | Courtaulds Films & Packaging Holdings Ltd | High molecular film |
| JPH0695303A (en) * | 1992-09-16 | 1994-04-08 | Fuji Photo Film Co Ltd | Packing material for photographic sensitive material |
| JPH0976419A (en) * | 1995-09-20 | 1997-03-25 | Sumitomo Bakelite Co Ltd | Multilaered film or sheet and production thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002019048A (en) | 2002-01-22 |
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