JP2015048471A - Film-state compact production method - Google Patents

Film-state compact production method Download PDF

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JP2015048471A
JP2015048471A JP2013183379A JP2013183379A JP2015048471A JP 2015048471 A JP2015048471 A JP 2015048471A JP 2013183379 A JP2013183379 A JP 2013183379A JP 2013183379 A JP2013183379 A JP 2013183379A JP 2015048471 A JP2015048471 A JP 2015048471A
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film
polyolefin
production method
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modified
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菜津美 藤原
Natsumi Fujiwara
菜津美 藤原
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Zeon Corp
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Nippon Zeon Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a film-state compact production method which can achieve high adhesion between a film and a new layer formed on a treatment surface of the film, even after the polyolefin film which is subjected to modification treatment is stored for a long period.SOLUTION: Provided is the film-state compact production method characterized in that the film obtained from the polyolefin is subjected to modification treatment by an ultraviolet ray, and then the modification treatment surface of the film is cleaned by liquid, and a new layer is formed on the film within 24 hours before.

Description

本発明は、改質処理されたポリオレフィンフィルムを長期間保存した後でも、当該フィルムとその処理表面上に形成された新たな層との間に高い密着性が得られるフィルム状成形体の製造方法に関する。   The present invention relates to a method for producing a film-like molded article in which high adhesion is obtained between the film and a new layer formed on the treated surface even after the modified polyolefin film is stored for a long period of time. About.

オレフィン系ポリマーからなる材料の表面を脱脂処理した後、紫外線照射により表面改質し、次いで水洗することで、改質表面に形成する金属皮膜との密着性を高めることができることは知られている(特許文献1)。   It is known that the surface of a material composed of an olefin polymer is degreased and then surface-modified by ultraviolet irradiation, and then washed with water, thereby improving the adhesion with a metal film formed on the modified surface. (Patent Document 1).

特開2008−094923号公報JP 2008-094923 A

かかる従来技術のもと、本発明者は、金属皮膜ではない材料として例えば樹脂フィルムを積層する場合には、改質表面を洗浄後、24時間以内に積層することで、密着性の低下が防止できること、しかも、紫外線照射による改質処理から3か月後であっても、同等の効果が得られることを見いだし、本発明を完成させるに至った。   Under such a conventional technique, the present inventor, for example, when laminating a resin film as a material that is not a metal film, prevents degradation of adhesion by laminating the modified surface within 24 hours after washing. In addition, the present inventors have found that the same effect can be obtained even after three months from the modification treatment by ultraviolet irradiation, and have completed the present invention.

かくして本発明によれば、ポリオレフィンからなるフィルムを紫外線で表面を改質処理した後、液体にてフィルムの改質処理面を洗浄し、24時間前以内に当該フィルム上に新たな層を形成することを特徴とするフィルム状成形体の製造方法が提供される。
前記ポリオレフィンは、脂環式構造含有重合体であるのが好ましい。
前記液体は、アルカリ水溶液であるのが好ましい。
Thus, according to the present invention, the surface of the polyolefin film is modified with ultraviolet rays, and then the modified surface of the film is washed with a liquid, and a new layer is formed on the film within 24 hours. A method for producing a film-like molded article is provided.
The polyolefin is preferably an alicyclic structure-containing polymer.
The liquid is preferably an alkaline aqueous solution.

<フィルム>
本発明に用いるフィルムはポリオレフィンからなる。ポリオレフィンは、分子内に重合性二重結合を有するオレフィン系単量体を単独重合もしくは共重合してなるものである。
<Film>
The film used in the present invention is made of polyolefin. Polyolefin is obtained by homopolymerizing or copolymerizing an olefin monomer having a polymerizable double bond in the molecule.

オレフィン系単量体に格別な制限はないが、例えば、エチレン、プロピレン、1−ブテン、1−ペンテン、1−ヘキセン、1−ヘプテン、1−オクテン、4−メチル−1−ペンテン、酢酸ビニルなどのα−オレフィン類;2−ノルボルネン、テトラシクロドデセン、ジシクロペンタジエンなどの環状オレフィン類;ブタジエンやイソプレンなどの共役ジエン類等が挙げられる。これらのオレフィン系単量体は、単独で用いられても良いし、2種類以上が併用されても良い。   Although there is no special restriction | limiting in an olefin type monomer, For example, ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 4-methyl-1-pentene, vinyl acetate etc. Α-olefins; cyclic olefins such as 2-norbornene, tetracyclododecene and dicyclopentadiene; conjugated dienes such as butadiene and isoprene. These olefinic monomers may be used alone or in combination of two or more.

ポリオレフィンの具体例としては、例えば、エチレンの単独重合体、エチレンと該エチレンと共重合可能な他のα−オレフィンとの共重合体、プロピレンの単独重合体、プロピレンと該プロピレンと共重合可能な他のα−オレフィンとの共重合体、プロピレンとエチレンとのランダム共重合体又はブロック共重合体、ブテンの単独重合体などの、α−オレフィン系重合体;2−ノルボルネンの単独開環重合体又はその水素添加物、2−ノルボルネンと他の環状オレフィンとの開環共重合体又はその水素添加物、2−ノルボルネンとα−エチレンとの付加重合体などの脂環式構造含有重合体;ブタジエンやイソプレンなどの共役ジエンの単独重合体又は共重合体等が挙げられ、なかでも脂環式構造含有重合体で著効が得られる。これらのポリオレフィンは、単独で用いられても良いし、2種類以上が併用されても良い。
脂環式構造含有重合体としては、国際公開WO2002/021517号、特開2006−116944号公報、特開2010−077251号公報などに知られている、(ア)ノルボルネン系重合体、(イ)単環の環状オレフィン重合体、(ウ)環状共役ジエン重合体、(エ)ビニル脂環式炭化水素重合体、及びこれらの水素化物などが挙げられる。これらの中でも、ノルボルネン系重合体、環状共役ジエン重合体、ビニル脂環式炭化水素重合体、及びこれらの水素化物が好ましく、ノルボルネン系重合体、ビニル脂環式炭化水素重合体、及びこれらの水素化物がより好ましく、ノルボルネン系重合体の水素化物が特に好ましい。
ノルボルネン系重合体、単環の環状オレフィン重合体又は環状共役ジエン重合体の分子量は、使用目的に応じて適宜選択されるが、重量平均分子量で、通常5,000〜500,000、好ましくは8,000〜200,000、より好ましくは10,000〜100,000の範囲であるときに、得られる樹脂組成物の成形加工性及び得られる樹脂型の機械的強度が高度にバランスされて好適である。
Specific examples of polyolefin include, for example, a homopolymer of ethylene, a copolymer of ethylene and another α-olefin copolymerizable with ethylene, a homopolymer of propylene, and a copolymer of propylene and the propylene. Other α-olefin copolymers, random copolymers or block copolymers of propylene and ethylene, α-olefin polymers such as butene homopolymers; 2-norbornene ring-opened polymers Or a hydrogenated product thereof, a ring-opening copolymer of 2-norbornene and another cyclic olefin or a hydrogenated product thereof, an alicyclic structure-containing polymer such as an addition polymer of 2-norbornene and α-ethylene; butadiene And homopolymers or copolymers of conjugated dienes such as isoprene, among which alicyclic structure-containing polymers are particularly effective. These polyolefins may be used alone or in combination of two or more.
Examples of the alicyclic structure-containing polymer include (a) norbornene-based polymers known in International Publication WO 2002/021517, JP-A 2006-116944, JP-A 2010-077751, and the like. Examples thereof include monocyclic cyclic olefin polymers, (c) cyclic conjugated diene polymers, (d) vinyl alicyclic hydrocarbon polymers, and hydrides thereof. Among these, norbornene-based polymers, cyclic conjugated diene polymers, vinyl alicyclic hydrocarbon polymers, and hydrides thereof are preferable, norbornene-based polymers, vinyl alicyclic hydrocarbon polymers, and hydrogens thereof. More preferred is a hydride of a norbornene polymer.
The molecular weight of the norbornene polymer, monocyclic olefin polymer or cyclic conjugated diene polymer is appropriately selected according to the purpose of use, but is usually 5,000 to 500,000, preferably 8 in terms of weight average molecular weight. When the range is from 10,000 to 200,000, more preferably from 10,000 to 100,000, the molding processability of the obtained resin composition and the mechanical strength of the obtained resin mold are highly balanced and suitable. is there.

ビニル脂環式炭化水素重合体の分子量は、ビニル脂環式炭化水素重合体の使用目的に応じて適宜選択されるが、重量平均分子量で、通常10,000〜300,000、好ましくは15,000〜250,000、より好ましくは20,000〜200,000の範囲にある。重量平均分子量がこの範囲にあると、得られる樹脂組成物の成形加工性及び得られる樹脂型の機械的強度とが高度にバランスされるので好ましい。   The molecular weight of the vinyl alicyclic hydrocarbon polymer is appropriately selected according to the intended use of the vinyl alicyclic hydrocarbon polymer, but is usually 10,000 to 300,000, preferably 15, in terms of weight average molecular weight. It is in the range of 20,000 to 250,000, more preferably 20,000 to 200,000. When the weight average molecular weight is within this range, the molding processability of the obtained resin composition and the mechanical strength of the obtained resin mold are highly balanced, which is preferable.

脂環構造含有重合体のガラス転移温度は50〜200℃の範囲とすることができる。中でも、70〜170℃の範囲にあると好ましく、90〜140℃の範囲にあるとより好ましい。ガラス転移温度が上記範囲にあるときに、得られる成形体の強度特性及び耐熱性並びに得られる樹脂組成物の成形加工性のバランスに優れる。   The glass transition temperature of the alicyclic structure-containing polymer can be in the range of 50 to 200 ° C. Especially, it exists in the range of 70-170 degreeC, and it is more preferable in it being in the range of 90-140 degreeC. When the glass transition temperature is in the above range, the balance between the strength characteristics and heat resistance of the resulting molded article and the molding processability of the resulting resin composition is excellent.

また、ポリオレフィンには、酸化防止剤、紫外線吸収剤、帯電防止剤、造核剤、スリップ剤、防曇剤、染料、顔料、着色剤、天然油、合成油、可塑剤、有機又は無機の充填剤、抗菌剤、消臭剤、脱臭剤等、合成樹脂に一般的に用いられる各種配合剤を添加してもよい。   Polyolefins also contain antioxidants, ultraviolet absorbers, antistatic agents, nucleating agents, slip agents, antifogging agents, dyes, pigments, colorants, natural oils, synthetic oils, plasticizers, organic or inorganic fillers. Various compounding agents generally used for synthetic resins, such as agents, antibacterial agents, deodorants, and deodorants, may be added.

フィルムの成形方法に格別な制限はなく、例えば、予めポリオレフィンと必要に応じて用いられる配合剤とを混合した樹脂組成物を押出機にて溶融混練した後、押出し、Tダイやサーキュラーダイ等を用いて、フィルム状に成形する方法や、前記樹脂組成物を有機溶剤のような溶媒に溶解もしくは分散させた後、キャスト方式でフィルム状に成形する方法等が挙げられる。
また本発明に用いられるフィルムは、単層フィルムであっても良いし、少なくとも1つの最外層がポリオレフィンを構成材料としてなるフィルムからなるものである2層以上の多層フィルムであっても良い。
There is no particular limitation on the method of forming the film. For example, a resin composition in which polyolefin and a compounding agent used as necessary are mixed and melt-kneaded in an extruder, and then extruded, T-die, circular die, etc. And a method of forming into a film shape, a method of dissolving or dispersing the resin composition in a solvent such as an organic solvent, and then forming into a film shape by a cast method.
The film used in the present invention may be a single layer film, or may be a multilayer film having two or more layers in which at least one outermost layer is made of a film comprising polyolefin as a constituent material.

<改質処理>
本発明において、フィルムの改質処理は紫外線照射にて行う。
照射する紫外線の波長は、通常180nm〜400nmである。
照射する紫外線の強度は、通常1mW/cm〜500mW/cmである。紫外線の強度が弱すぎると表面改質の効果が十分ではなく、逆に強すぎると基材を劣化させる原因となる。
紫外線を照射する時間は、通常0.5〜60分間である。照射時間が短すぎると表面改質の効果が十分ではなく、また、照射時間が余りに長いと、改質効果向上の効果は特に得られないまま生産性に劣ることになる。
紫外線を照射する時の温度は、基材となるオレフィンからなるフィルムの耐熱温度を考慮して設定すれば良いが、通常は室温である。
<Reforming treatment>
In the present invention, the film modification treatment is performed by ultraviolet irradiation.
The wavelength of the irradiated ultraviolet light is usually 180 nm to 400 nm.
Intensity of ultraviolet irradiation is usually 1mW / cm 2 ~500mW / cm 2 . If the intensity of the ultraviolet rays is too weak, the effect of surface modification is not sufficient, and conversely, if it is too strong, it causes deterioration of the substrate.
The time for irradiating with ultraviolet rays is usually 0.5 to 60 minutes. If the irradiation time is too short, the effect of surface modification is not sufficient, and if the irradiation time is too long, the effect of improving the modification effect is not particularly obtained and the productivity is inferior.
Although the temperature at the time of irradiating with ultraviolet rays may be set in consideration of the heat-resistant temperature of the film made of olefin as a base material, it is usually room temperature.

<改質処理面の洗浄>
表面処理されたフィルムを洗浄する方法に格別な制限はなく、フィルムを洗浄液に浸漬する方法や、フィルム表面に洗浄液を噴霧したり、連続的に流したりする方法が挙げられる。
洗浄液は、通常水溶性のものが採用される。具体的には、水;水酸化ナトリウム、水酸化カリウム、炭酸ナトリウム、炭酸水素ナトリウム、炭酸カリウムなどのアルカリ化合物の水溶液(アルカリ水溶液);が好適であり、アルカリ水溶液がより好適である。
アルカリ水溶液で洗浄した場合、更に水洗浄を行い、アルカリ成分を除去するのが好ましい。
<Cleaning of the modified surface>
There is no particular limitation on the method of cleaning the surface-treated film, and a method of immersing the film in the cleaning solution, a method of spraying the cleaning solution on the film surface, or a method of continuously flowing the film can be mentioned.
As the cleaning liquid, a water-soluble one is usually employed. Specifically, water; an aqueous solution (alkaline aqueous solution) of an alkali compound such as sodium hydroxide, potassium hydroxide, sodium carbonate, sodium hydrogen carbonate, potassium carbonate, etc. is preferable, and an alkaline aqueous solution is more preferable.
When washed with an alkaline aqueous solution, it is preferable to further wash with water to remove the alkaline component.

<新たな層の形成>
洗浄後のフィルム表面には、使用目的に応じて任意の材料を用いて新たな層を形成することができる。新たな層は、積層によって形成されるのでもよいし、表面処理により粗面化された部分に薬剤等を含浸させフィルム表面に何らかの機能を持った層を作るのでもよい。
積層によって新たな層を形成する方法としては、具体的には、他の樹脂フィルムを、接着剤等を介して又は介さずに積層する、無機膜を蒸着やスパッタリングによって積層する、などの積層により新たな層を形成する方法が挙げられる。
<Formation of a new layer>
A new layer can be formed on the cleaned film surface using any material depending on the purpose of use. The new layer may be formed by lamination, or a layer having a certain function on the film surface may be formed by impregnating the surface roughened by the surface treatment with a drug or the like.
As a method for forming a new layer by lamination, specifically, by laminating other resin films with or without an adhesive or the like, or by laminating an inorganic film by vapor deposition or sputtering, etc. The method of forming a new layer is mentioned.

薬剤等を含浸させてフィルム表面に機能層を形成する方法としては、具体的には、カーボンや金属酸化物(酸化チタン等)やナノサイズの金属粒子などの無機粒子;炭素繊維などの無機繊維、マイカなどの層状化合物などの機能性無機材料;を溶媒の存在下又は不存在下に接触させる、顔料、染料などの着色剤;香料や消臭剤;メラミン化合物のような架橋剤;ベンゾトリアゾール系紫外線吸収剤、ベンゾフェノン系紫外線吸収剤、トリアジン系紫外線吸収剤などの紫外線吸収剤;赤外線吸収剤;水溶性ポリマーなどの防曇剤;ポリ−L−リジンなどの細胞固定用タンパク質やDNAなどの機能性材料;等の有機材料を溶媒の存在下又は不存在下に接触させる、などの方法で、フィルム表面に薬剤等を含浸させる方法などが挙げられる。   Specifically, the method for forming a functional layer on the film surface by impregnating with a drug or the like includes inorganic particles such as carbon, metal oxides (such as titanium oxide) and nano-sized metal particles; inorganic fibers such as carbon fibers , Functional inorganic materials such as layered compounds such as mica, etc .; colorants such as pigments and dyes that are contacted in the presence or absence of solvents; fragrances and deodorants; crosslinkers such as melamine compounds; benzotriazole UV absorbers such as UV absorbers, benzophenone UV absorbers, triazine UV absorbers; infrared absorbers; anti-fogging agents such as water-soluble polymers; cell-fixing proteins such as poly-L-lysine and DNA Examples include a method in which an organic material such as a functional material is contacted in the presence or absence of a solvent, and a method of impregnating the surface of the film with a drug or the like.

<フィルムの用途>
このようにして得られたフィルムは、防曇性フィルム、帯電防止性フィルム、速乾性フィルムなどに用いることができる。また、機能性を付与することでさらに幅広い用途に用いることが可能である。例えば、機能性硬化性樹脂をフィルムの改質層にコーティングすることで、表面傷つき防止フィルム、反射防止フィルム、カラーフィルム、紫外線カットフィルム、赤外線カットフィルムなどに利用できる。チタニア粒子や銀粒子、導電性粒子を含浸させることで防汚・抗菌フィルム、導電性フィルムなどに利用できる。医療デバイスとしては、DNAアレイ、タンパク質アレイなどのバイオチップなどに利用でき、迅速に分析結果を知る必要がある救急医療現場での患者の生体成分の分析、オーダーメイド医療のための診断などに用いられる。
<Application of film>
The film thus obtained can be used for an antifogging film, an antistatic film, a quick-drying film and the like. Moreover, it can be used for a wider range of applications by imparting functionality. For example, by coating a functional curable resin on the modified layer of the film, the film can be used for an anti-scratch film, an antireflection film, a color film, an ultraviolet cut film, an infrared cut film, and the like. By impregnating titania particles, silver particles, and conductive particles, it can be used for antifouling / antibacterial films, conductive films, and the like. As a medical device, it can be used for biochips such as DNA arrays and protein arrays. It is used for analysis of biological components of patients in emergency medical settings where it is necessary to quickly know the results of analysis, diagnosis for custom-made medical care, etc. It is done.

以下、本発明について、実施例及び比較例を挙げて、より具体的に説明する。ただし本発明は、これらの実施例のみに限定されるものではない。以下の実施例及び比較例において、部又は%は、特に断りがない限り、重量基準である。   Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples. However, the present invention is not limited only to these examples. In the following examples and comparative examples, “part” or “%” is based on weight unless otherwise specified.

実施例、比較例共に、基材であるポリオレフィンからなるフィルムとして、ノルボルネン系重合体の水素化物から得られるフィルムである「ゼオノアフィルム(登録商標)ZF−16」(日本ゼオン社製、厚み100μm)を用いた。
UV照射、保管、洗浄、及び評価は後述の方法に従った。
In both Examples and Comparative Examples, “Zeonor Film (registered trademark) ZF-16” (manufactured by Nippon Zeon Co., Ltd., thickness 100 μm) is a film obtained from a hydride of norbornene-based polymer as a film made of polyolefin as a base material. Was used.
UV irradiation, storage, washing, and evaluation followed the methods described below.

(実施例1)
後述する紫外線照射処理を行った後、1枚のフィルムについて濡れ性及び接着性を評価し、もう1枚のフィルムは保管し、後述の方法で洗浄する直前に濡れ性を評価し、洗浄した後に接着性を評価した。
(比較例1)
後述する紫外線照射処理を行った後、1枚のフィルムについて濡れ性及び接着性を評価し、もう1枚のフィルムは後述の方法で洗浄した後、保管し、濡れ性及び接着性を評価した。
(比較例2)
後述するプラズマ照射処理を行った後、1枚のフィルムについて濡れ性及び接着性を評価し、もう1枚のフィルムは保管し、後述の方法で洗浄する直前に濡れ性を評価し、洗浄した後に接着性を評価した。
(比較例3)
後述するコロナ放電処理を行った後、1枚のフィルムについて濡れ性及び接着性を評価し、もう1枚のフィルムは保管し、後述の方法で洗浄する直前に濡れ性を評価し、洗浄した後に接着性を評価した。
実施例及び比較例の工程を表1にまとめた。
(Example 1)
After performing the ultraviolet irradiation treatment described later, the wettability and adhesiveness of one film are evaluated, the other film is stored, and the wettability is evaluated immediately before cleaning by the method described below, and after cleaning. Adhesion was evaluated.
(Comparative Example 1)
After performing the ultraviolet irradiation treatment described later, the wettability and adhesiveness of one film were evaluated, and the other film was washed by the method described later, stored, and evaluated for wettability and adhesiveness.
(Comparative Example 2)
After performing the plasma irradiation treatment described later, the wettability and the adhesiveness of one film are evaluated, and the other film is stored and evaluated for wettability immediately before cleaning by the method described later, and after cleaning. Adhesion was evaluated.
(Comparative Example 3)
After performing the corona discharge treatment described later, the wettability and adhesiveness of one film are evaluated, and the other film is stored, evaluated for wettability immediately before cleaning by the method described later, and after cleaning. Adhesion was evaluated.
The steps of Examples and Comparative Examples are summarized in Table 1.

Figure 2015048471
Figure 2015048471

<紫外線照射>
UV照射装置(製品名「KOL2−1200V/R」、江東電気社製、光源:低圧水銀灯、光源の波長184.9nm及び253.7nm)を用い、大気中にてポリオレフィンフィルムの片面に、紫外線を5分間照射し、UV改質オレフィンフィルムを得た。光源からのサンプル距離は、エネルギー強度が20mW/cm(253.7nm)になるよう設置した(約30mm)。
<プラズマ照射>
常圧プラズマ照射装置(製品名「ADMASTERII−300dM」、イースクエア社製)を用いて、ポリオレフィンフィルムの片面にプラズマを照射し、プラズマ改質ポリオレフィンフィルムを得た。窒素流量150L/min、フィルム搬送速度1.5m/minの条件で行った。
<コロナ放電>
コロナ放電装置(製品名「A4SW−FLN」、春日電機社製)を用いて、ポリオレフィンフィルムの片面にコロナを放電し、コロナ改質ポリオレフィンフィルムを得た。放電量50W/min/m、フィルム搬送速度15m/minの条件で行った。
<UV irradiation>
Using a UV irradiation device (product name “KOL2-1200V / R”, manufactured by Koto Electric Co., Ltd., light source: low-pressure mercury lamp, light source wavelengths 184.9 nm and 253.7 nm), ultraviolet rays were applied to one side of the polyolefin film in the atmosphere. Irradiation was performed for 5 minutes to obtain a UV-modified olefin film. The sample distance from the light source was set so that the energy intensity was 20 mW / cm 2 (253.7 nm) (about 30 mm).
<Plasma irradiation>
Using a normal pressure plasma irradiation apparatus (product name “ADMASTERII-300dM”, manufactured by Esquare Co., Ltd.), plasma was irradiated on one side of the polyolefin film to obtain a plasma-modified polyolefin film. The measurement was performed under the conditions of a nitrogen flow rate of 150 L / min and a film conveyance speed of 1.5 m / min.
<Corona discharge>
Using a corona discharge device (product name “A4SW-FLN”, Kasuga Denki Co., Ltd.), the corona was discharged on one side of the polyolefin film to obtain a corona-modified polyolefin film. The discharge was performed under the conditions of 50 W / min / m 2 and a film conveyance speed of 15 m / min.

<保管>
保管は、フィルムを、個別にクリーンルーム用ワイパー(製品名「BEMCOT(登録商標)」、旭化成せんい社製)で包み、ビニール袋に入れ、密閉せずにそのまま3ヵ月間暗室に保管した。
<Storage>
For storage, the film was individually wrapped in a clean room wiper (product name “BEMOT (registered trademark)”, manufactured by Asahi Kasei Fibers), placed in a plastic bag, and stored in a dark room without sealing for 3 months.

<洗浄(アルカリ処理)>
改質ポリオレフィンフィルムを50g/Lの水酸化ナトリウム水溶液に60℃で2分間浸漬させた。その後、3回水洗処理を行った。
<Washing (alkali treatment)>
The modified polyolefin film was immersed in a 50 g / L aqueous sodium hydroxide solution at 60 ° C. for 2 minutes. Then, the water washing process was performed 3 times.

<濡れ性評価>
改質直後及び改質から3か月目の改質ポリオレフィンフィルムの改質面に水を滴下し、水接触角を測定した。測定には、自動接触角計(製品名「DM−501」、協和界面科学社製)を用い、室温にて行った。評価基準として、表面改質直後の接触角においては、接触角が50°未満のものを◎、50°以上70°未満のものを○、70°以上80°未満のものを△、80°以上のものを×とした。また、保管後の接触角については、改質直後からの接触角の増加(悪化)で評価した。増加した接触角が、20°未満のものを◎、20°以上30°未満のものを○、30°以上40°未満のものを△、50°以上のものを×とした。
<Evaluation of wettability>
Water was dropped on the modified surface of the modified polyolefin film immediately after the modification and three months after the modification, and the water contact angle was measured. The measurement was performed at room temperature using an automatic contact angle meter (product name “DM-501”, manufactured by Kyowa Interface Science Co., Ltd.). As the evaluation criteria, the contact angle immediately after the surface modification is ◎ if the contact angle is less than 50 °, ○ if it is 50 ° or more and less than 70 °, Δ if it is 70 ° or more and less than 80 °, or 80 ° or more. Was marked with x. Further, the contact angle after storage was evaluated by the increase (deterioration) of the contact angle immediately after the modification. The contact angle increased by less than 20 ° was evaluated as ◎, from 20 ° to less than 30 ° as ○, from 30 ° to less than 40 ° as Δ, and as 50 ° or more as x.

<接着性評価>
改質直後及び改質から3か月目の改質ポリオレフィンフィルムの改質面に、接着剤を用いて難接着フィルムを貼付し、その接着強度を保管前後で測定した。接着剤には、アクリル系接着剤(製品名「DP−8005クリア」、住友スリーエム社製)を用い、難接着フィルムには、TACフィルム(製品名「フジタック(登録商標)」、富士フイルム社製)を幅10mm、長さ250mmの短冊形試験片に裁断して用いた。接着強度の測定には、東京試験機製小型卓上試験機LSCシリーズの掴み装置を用いた。改質オレフィンフィルムとTACフィルムの端部を掴み、剥離角度90度法により、剥離速度毎分30mm条件で試験した。なお、実施例1及び比較例2、3においては、アルカリ処理1時間後に評価した。
評価基準として、接着強度が10N/cm以上のものを◎、5N/cm以上10N/cm未満のものを○、2N/cm以上5N/cm未満のものを△、1N/cm未満のものを×とした。
濡れ性評価及び密着性評価の結果を、表2に示す。
<Adhesion evaluation>
Immediately after the modification and on the modified surface of the modified polyolefin film three months after the modification, a difficult-to-adhere film was attached using an adhesive, and the adhesive strength was measured before and after storage. An acrylic adhesive (product name “DP-8005 clear”, manufactured by Sumitomo 3M Limited) is used as the adhesive, and a TAC film (product name “Fujitac (registered trademark)”, manufactured by Fuji Film Co., Ltd.) is used as the difficult-to-adhere film. ) Was cut into strip-shaped test pieces having a width of 10 mm and a length of 250 mm. For the measurement of the adhesive strength, a gripping device of a small desktop testing machine LSC series manufactured by Tokyo Tester was used. The ends of the modified olefin film and the TAC film were grasped and tested at a peeling speed of 30 mm per minute by the peeling angle 90 degree method. In Example 1 and Comparative Examples 2 and 3, the evaluation was made 1 hour after the alkali treatment.
As evaluation criteria, those having an adhesive strength of 10 N / cm or more are: ◎ 5 N / cm or more and less than 10 N / cm ○, 2 N / cm or more and less than 5 N / cm △ 1 N / cm or less × It was.
Table 2 shows the results of wettability evaluation and adhesion evaluation.

Figure 2015048471
Figure 2015048471
Figure 2015048471
Figure 2015048471

上記の結果、実施例1では3ヵ月保管後も接触角、接着強度共にほぼ保持された。比較例1では、接触角は大きく低下しなかったが、接着強度は低下した。比較例2、3では、双方とも大幅に低下した。すなわち、UVで表面改質を行い、さらには使用24時間前以内にアルカリ処理を行うことで、長期間に渡り接着性を保持できることが判明した。   As a result, in Example 1, both the contact angle and the adhesive strength were substantially maintained even after storage for 3 months. In Comparative Example 1, the contact angle did not decrease significantly, but the adhesive strength decreased. In Comparative Examples 2 and 3, both were significantly reduced. That is, it was found that the adhesiveness can be maintained over a long period of time by performing surface modification with UV and further performing an alkali treatment within 24 hours before use.

Claims (3)

ポリオレフィンからなるフィルムを紫外線で表面を改質処理した後、液体にてフィルムの改質処理面を洗浄し、24時間前以内に当該フィルム上に新たな層を形成することを特徴とするフィルム状成形体の製造方法。 A film formed by modifying a film made of polyolefin with ultraviolet rays and then cleaning the modified surface of the film with a liquid to form a new layer on the film within 24 hours Manufacturing method of a molded object. 前記ポリオレフィンが、脂環式構造含有重合体である請求項1記載の製造方法。 The production method according to claim 1, wherein the polyolefin is an alicyclic structure-containing polymer. 前記液体がアルカリ水溶液である請求項1又は2記載の製造方法。 The production method according to claim 1, wherein the liquid is an alkaline aqueous solution.
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JP2018089942A (en) * 2016-12-02 2018-06-14 ダイニック株式会社 Transparent sheet film material for printing
WO2019093380A1 (en) * 2017-11-10 2019-05-16 横浜ゴム株式会社 Method for manufacturing laminated body
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JP2018089942A (en) * 2016-12-02 2018-06-14 ダイニック株式会社 Transparent sheet film material for printing
WO2019093380A1 (en) * 2017-11-10 2019-05-16 横浜ゴム株式会社 Method for manufacturing laminated body
WO2019093361A1 (en) * 2017-11-10 2019-05-16 横浜ゴム株式会社 Method for manufacturing laminated body
JP2019084521A (en) * 2017-11-10 2019-06-06 横浜ゴム株式会社 Manufacturing method for laminate
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