JP2017071696A - Resin composition and film and laminate made of the same - Google Patents

Resin composition and film and laminate made of the same Download PDF

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JP2017071696A
JP2017071696A JP2015199573A JP2015199573A JP2017071696A JP 2017071696 A JP2017071696 A JP 2017071696A JP 2015199573 A JP2015199573 A JP 2015199573A JP 2015199573 A JP2015199573 A JP 2015199573A JP 2017071696 A JP2017071696 A JP 2017071696A
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resin composition
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weight
vinyl acetate
ethylene
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JP6699123B2 (en
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隆史 逸見
Takashi Henmi
隆史 逸見
幸田 真吾
Shingo Koda
真吾 幸田
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Tosoh Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a resin composition from which a film having a temperature-sensitive light-controlling performance, a small density and excellent workability can be produced, and a film and a laminate made of the resin composition.SOLUTION: The resin composition comprises 50 to 99 wt.% of an ethylene vinyl acetate copolymer (A) having a vinyl acetate content percentage of 5 to 50 wt.%, and 50 to 1 wt.% of a cyclic olefin copolymer (B) having a density of 1.10 g/cmor less (where the total of (A) and (B) is 100 wt.%).SELECTED DRAWING: None

Description

本発明は、使用環境の温度に応じて光線の透過性が可逆的に変化する、温度感応性調光性能を有した樹脂組成物並びにこれよりなるフィルム及び積層体に関するものである。   The present invention relates to a resin composition having temperature-sensitive dimming performance in which light transmittance reversibly changes according to the temperature of the use environment, and a film and laminate comprising the same.

従来、農業分野においては、作物の安定した収穫を通年で行うために、農業用ハウスが利用されている。農業用ハウスに求められる主な性能は冬場の温度低下を抑制することであり、ハウス用フィルムには透明性とともに保温性の向上が求められている。特に近年は、暖房に必要な燃料の高騰による経済的な負担や化石燃料の燃焼に伴う環境への負荷が問題となっており、フィルムの保温性向上の要求は一層強まっている。   Conventionally, in the agricultural field, an agricultural house is used in order to perform a stable harvest of crops throughout the year. The main performance required for an agricultural house is to suppress the temperature drop in winter, and the film for house is required to have improved heat retention as well as transparency. In particular, in recent years, the economic burden due to soaring fuel required for heating and the environmental burden associated with the combustion of fossil fuels have become problems, and the demand for improving the heat retaining properties of the film has become even stronger.

一方で、夏場の強い直射日光によって農業用ハウス内の温度が上昇しすぎることにより生じる植物の育成障害が問題となっている。夏場のハウス内の温度上昇を抑制するための対策としては、光線を散乱させる粒子の配合により直達光を減少させるとともに散乱光を増加させて光線量を維持する機能を有するフィルムが使用されている。   On the other hand, there is a problem of plant growth failure caused by excessively high temperature in the agricultural house due to strong direct sunlight in summer. As a measure to suppress the temperature rise in the house in the summer, a film having a function of maintaining the amount of light by reducing the direct light by adding particles that scatter light and increasing the scattered light is used. .

しかし、前記2つの課題をいずれも解決するためには、夏場と冬場で異なる性能を有するフィルムを張り替える必要がある。フィルムの張り替えは、経済的な負担が非常に大きく、また農業就業人口が減少している現在の状況では作業に要する人手を確保することが困難である場合が多い。   However, in order to solve both of the two problems, it is necessary to replace films having different performances in summer and winter. Re-filming has a very high economic burden, and it is often difficult to secure the manpower required for work in the current situation where the agricultural working population is decreasing.

この課題を解決する手段として、感温性調光フィルムが提案されている。これは温度によってフィルムの光線透過性が可逆的に変化するフィルムであり、低温では透明性フィルム、高温では光散乱フィルムとなるものである。これによって、冬場の保温と夏場の室内温度上昇抑制をフィルムの張り替えなしに実現することが可能である。   As a means for solving this problem, a temperature-sensitive light control film has been proposed. This is a film in which the light transmittance of the film reversibly changes depending on the temperature, and becomes a transparent film at a low temperature and a light scattering film at a high temperature. As a result, it is possible to achieve heat insulation in winter and suppression of indoor temperature rise in summer without changing the film.

例えば、2つの互いに混和性でない成分からなり、2つの成分は屈折率の温度依存性が異なることを特徴とし、温度変化に伴って光線透過率が可逆的に変化する樹脂組成物が開示されている(例えば、特許文献1参照。)。   For example, a resin composition comprising two components that are not miscible with each other, the two components being different in temperature dependency of refractive index, and a light transmittance reversibly changing with a temperature change is disclosed. (For example, refer to Patent Document 1).

また、樹脂と粒子を配合することにより、環境の温度変化に伴って光線拡散率が可逆的に変化する樹脂組成物が開示されており、実施例としてエチレン・酢酸ビニル共重合体に架橋ポリメチルメタクリレート粒子およびゼオライト粒子が配合された組成物が開示されている(例えば、特許文献2参照。)。   In addition, a resin composition in which the light diffusivity changes reversibly with changes in the temperature of the environment by blending the resin and particles is disclosed. As an example, an ethylene / vinyl acetate copolymer is cross-linked to a crosslinked polymethyl ester. A composition containing methacrylate particles and zeolite particles is disclosed (for example, see Patent Document 2).

これらの感温性調光性能を有する組成物においては、無機微粒子や比較的高密度の透明樹脂を高濃度で配合することが必要なため、組成物の密度が通常のフィルムに比べて高くなるという問題があった。例えば、エチレン・酢酸ビニル共重合体の密度が0.92〜0.97g/cmに対して、ゼオライトは約2.5g/cm、ポリメチルメタクリレート樹脂は約1.2g/cmと大きな密度を持つため、これらをフィルム全体の10〜40重量%程度配合すると、かなりのフィルム重量増加につながる。 In these compositions having temperature-sensitive light control performance, it is necessary to blend inorganic fine particles and a relatively high density transparent resin at a high concentration, so that the density of the composition is higher than that of a normal film. There was a problem. For example, a large density of the ethylene-vinyl acetate copolymer with respect 0.92~0.97g / cm 3, the zeolite is from about 2.5 g / cm 3, polymethyl methacrylate resin and about 1.2 g / cm 3 Since they have a density, when they are blended in an amount of about 10 to 40% by weight of the whole film, the film weight increases considerably.

農業用フィルムなどにおいては、農業就労人口の減少や高齢化の影響で展張時の作業性を向上させるためにできるだけ軽量なフィルムが求められている。従来農業用フィルムの主流であったポリ塩化ビニル製のフィルムは、密度が大きく作業性が劣ることが原因で、使用量が減少しつつある。   As for agricultural films, a film that is as light as possible is required to improve workability at the time of expansion due to the decrease in the agricultural working population and the aging of the population. Conventionally, the film made of polyvinyl chloride, which has been the mainstream of agricultural films, is decreasing in use because of its high density and poor workability.

特開2000−95957号公報JP 2000-95957 A 特開2001−226604号公報JP 2001-226604 A

本発明は、上記のような状況を鑑みなされたものであって、感温性調光性能を有しさらに密度が小さく作業性に優れるフィルムを製造することのできる樹脂組成物並びにこれよりなるフィルム及び積層体を提供することを目的とするものである。   The present invention has been made in view of the above circumstances, and is a resin composition capable of producing a film having temperature-sensitive dimming performance, a small density and excellent workability, and a film comprising the same. And it aims at providing a laminated body.

本発明者らは前記課題を解決すべく鋭意検討した結果、特定のエチレン・酢酸ビニル共重合体と特定の環状オレフィンコポリマーを特定の比率で配合した場合に、感温性調光性能を発現しさらに比重の小さい樹脂組成物が得られることを見出し、本発明を完成するに至った。   As a result of intensive studies to solve the above problems, the present inventors have developed a temperature-sensitive dimming performance when a specific ethylene / vinyl acetate copolymer and a specific cyclic olefin copolymer are blended at a specific ratio. Furthermore, it discovered that a resin composition with small specific gravity was obtained, and came to complete this invention.

すなわち本発明は、酢酸ビニル含有率が5〜50重量%のエチレン・酢酸ビニル共重合体(A)50〜99重量%密度が1.10g/cm以下である環状オレフィンコポリマー(B)50〜1重量%((A)と(B)の合計は100重量%)を含む樹脂組成物に関するものである。また、これよりなるフィルム及び積層体に関するものである。 That is, the present invention relates to an ethylene / vinyl acetate copolymer (A) having a vinyl acetate content of 5 to 50% by weight and a cyclic olefin copolymer (B) having a density of 50 to 99% by weight of 1.10 g / cm 3 or less. The present invention relates to a resin composition containing 1% by weight (the total of (A) and (B) is 100% by weight). Moreover, it is related with the film and laminated body which consist of this.

以下に、本発明を詳細に説明する。   The present invention is described in detail below.

本発明の樹脂組成物を構成するエチレン・酢酸ビニル共重合体(A)は、酢酸ビニル含有率が5〜50重量%であり、好ましくは10〜40重量%、さらに好ましくは15〜35重量%である。酢酸ビニル含有量が5重量%未満だとエチレン・酢酸ビニル共重合体(A)の結晶性が高くなり、透明性が不十分になる恐れがある。また酢酸ビニル含有量が50重量%を超えると、樹脂の熱安定性が不十分となり成形加工に支障をきたす恐れがある。   The ethylene / vinyl acetate copolymer (A) constituting the resin composition of the present invention has a vinyl acetate content of 5 to 50% by weight, preferably 10 to 40% by weight, more preferably 15 to 35% by weight. It is. If the vinyl acetate content is less than 5% by weight, the crystallinity of the ethylene / vinyl acetate copolymer (A) increases, and the transparency may be insufficient. On the other hand, if the vinyl acetate content exceeds 50% by weight, the thermal stability of the resin becomes insufficient, which may hinder the molding process.

エチレン・酢酸ビニル共重合体(A)は、透明性を大きく損ねない範囲で、上記の樹脂を2種以上混合して使用することができる。   The ethylene / vinyl acetate copolymer (A) can be used by mixing two or more of the above resins within a range that does not significantly impair the transparency.

また、エチレン・酢酸ビニル共重合体(A)は、透明性を大きく損ねない範囲で、他の熱可塑性樹脂を混合して使用することができる。他の熱可塑性樹脂としては特に制約はないが、エチレン・酢酸ビニル共重合体との相溶性が高いことからオレフィン系重合体が好ましい。オレフィン系重合体としては、低密度ポリエチレン、エチレン・α−オレフィン共重合体、エチレン・酢酸ビニル共重合体ケン化物、エチレン・(メタ)アクリル酸共重合体、エチレン・(メタ)アクリル酸エステル共重合体およびポリプロピレンなどが例示できる。   Further, the ethylene / vinyl acetate copolymer (A) can be used by mixing with other thermoplastic resins as long as the transparency is not greatly impaired. Although there is no restriction | limiting in particular as another thermoplastic resin, Since an compatibility with an ethylene-vinyl acetate copolymer is high, an olefin polymer is preferable. Examples of the olefin polymer include low density polyethylene, ethylene / α-olefin copolymer, saponified ethylene / vinyl acetate copolymer, ethylene / (meth) acrylic acid copolymer, ethylene / (meth) acrylic acid ester copolymer. Examples thereof include a polymer and polypropylene.

本発明の樹脂組成物には、環状オレフィンコポリマー(B)が配合されていることが必要である。環状オレフィンコポリマー(B)はエチレン・酢酸ビニル共重合体(A)と混和せずにドメインを形成し、樹脂組成物に入射した光の一部は両者の界面において散乱する。その程度は両者の屈折率の差に応じて変化するが、エチレン・酢酸ビニル共重合体(A)と環状オレフィンコポリマー(B)では屈折率の温度依存性が異なるため、温度が変化すると両者の屈折率差が変化して、散乱光の程度が変わる。   The resin composition of the present invention needs to contain the cyclic olefin copolymer (B). The cyclic olefin copolymer (B) forms a domain without being mixed with the ethylene / vinyl acetate copolymer (A), and a part of the light incident on the resin composition is scattered at the interface between the two. The degree varies depending on the difference in refractive index between the two, but the ethylene-vinyl acetate copolymer (A) and the cyclic olefin copolymer (B) differ in temperature dependency of the refractive index. The difference in refractive index changes and the degree of scattered light changes.

本発明の樹脂組成物を構成する環状オレフィンコポリマー(B)は、密度が1.10g/cm以下である。密度が1.10g/cmを超えると、本発明の組成物全体の密度が大きくなり、フィルムとして使用する際の作業性が低下する恐れがある。 The cyclic olefin copolymer (B) constituting the resin composition of the present invention has a density of 1.10 g / cm 3 or less. When the density exceeds 1.10 g / cm 3 , the density of the entire composition of the present invention increases, and workability when used as a film may be reduced.

また、本発明の樹脂組成物を構成する環状オレフィンコポリマー(B)の25℃における屈折率は1.490〜1.520であることが好ましく、さらに好ましくは1.500〜1.520である。さらに、25℃におけるエチレン・酢酸ビニル共重合体(A)と環状オレフィンコポリマー(B)の屈折率の差は0〜0.040であることが好ましく、さらに好ましくは0.003〜0.035である。エチレン・酢酸ビニル共重合体(A)と環状オレフィンコポリマー(B)の屈折率差が前記の範囲であれば、成形品の実用温度範囲である0〜40℃において感温性調光性能が発現しやすい。
本発明の樹脂組成物を構成する環状オレフィンコポリマー(B)のガラス転移点は40℃以上であることが好ましい。ガラス転移点が40℃以上であれば、本発明の樹脂組成物の実用想定温度である0〜40℃においては温度による屈折率の変化は非常に小さくなり、感温性調光性能が発現しやすい。
Moreover, it is preferable that the refractive index in 25 degreeC of the cyclic olefin copolymer (B) which comprises the resin composition of this invention is 1.490-1.520, More preferably, it is 1.500-1.520. Further, the difference in refractive index between the ethylene / vinyl acetate copolymer (A) and the cyclic olefin copolymer (B) at 25 ° C. is preferably from 0 to 0.040, more preferably from 0.003 to 0.035. is there. If the difference in refractive index between the ethylene / vinyl acetate copolymer (A) and the cyclic olefin copolymer (B) is within the above range, the temperature-sensitive dimming performance is manifested at 0 to 40 ° C., which is the practical temperature range of the molded product. It's easy to do.
The glass transition point of the cyclic olefin copolymer (B) constituting the resin composition of the present invention is preferably 40 ° C. or higher. If the glass transition point is 40 ° C. or higher, the change in refractive index due to temperature becomes very small at 0 to 40 ° C., which is a practically assumed temperature of the resin composition of the present invention, and temperature-sensitive dimming performance is exhibited. Cheap.

本発明の樹脂組成物を構成する環状オレフィンコポリマー(B)は、環状オレフィンおよびその誘導体とエチレンの共重合体であり、分子構造中に脂環構造を有する。   The cyclic olefin copolymer (B) constituting the resin composition of the present invention is a copolymer of cyclic olefin and its derivatives and ethylene, and has an alicyclic structure in the molecular structure.

環状オレフィンおよびその誘導体としてはノルボルネンが代表例として挙げられる。ノルボルネン構造中の水素原子が極性基または非極性基で置換されていてもよい。また、複数の脂環構造を有していてもよい。   A typical example of the cyclic olefin and its derivative is norbornene. A hydrogen atom in the norbornene structure may be substituted with a polar group or a nonpolar group. Moreover, you may have a some alicyclic structure.

環状オレフィンコポリマー(B)は、環状オレフィンおよびその誘導体とエチレンを、付加重合もしくは水素化開環メタセシス重合することによって製造することができる。   The cyclic olefin copolymer (B) can be produced by addition polymerization or hydrogenated ring-opening metathesis polymerization of a cyclic olefin and a derivative thereof and ethylene.

本発明の樹脂組成物を構成する各成分の配合比率は、エチレン・酢酸ビニル共重合体(A)の割合が50〜99重量%、環状オレフィンコポリマー(B)の割合が50〜1重量%であり、合計で100重量%になるように配合することが必要である。環状オレフィンコポリマー(B)の配合比率が1重量%未満では感温性調光性能が不十分になり好ましくない。また50重量%を超えて配合すると、成形加工性が不十分になる恐れがある。   The blending ratio of each component constituting the resin composition of the present invention is such that the proportion of the ethylene / vinyl acetate copolymer (A) is 50 to 99% by weight and the proportion of the cyclic olefin copolymer (B) is 50 to 1% by weight. There is a need to blend so that the total amount is 100% by weight. When the blending ratio of the cyclic olefin copolymer (B) is less than 1% by weight, the temperature-sensitive light control performance is insufficient, which is not preferable. Moreover, when it mixes exceeding 50 weight%, there exists a possibility that molding processability may become inadequate.

本発明の樹脂組成物には、必要に応じて、酸化防止剤、安定剤、耐侯剤、紫外線吸収剤、帯電防止剤、スリップ剤、アンチブロック剤、防曇剤、防霧剤、保温剤、可塑剤など、樹脂に一般的に用いられている添加剤を本発明の目的を損なわない範囲で添加してもかまわない。   In the resin composition of the present invention, an antioxidant, a stabilizer, an anti-mold agent, an ultraviolet absorber, an antistatic agent, a slip agent, an antiblocking agent, an antifogging agent, an antifogging agent, a heat retaining agent, if necessary, Additives commonly used for resins such as plasticizers may be added within the range not impairing the object of the present invention.

本発明の樹脂組成物には、さらに脂環構造および/または芳香族環状構造を有するオリゴマー(C)を配合してもよい。このオリゴマー(C)をエチレン・酢酸ビニル共重合体(A)に配合することにより、両者の混合物の屈折率がオリゴマー(C)の濃度に比例して変化するため、屈折率の調整が容易になる。オリゴマーの種類には特に制約はないが、石油樹脂、テルペン系樹脂、ロジン系樹脂、キシレン系樹脂、アルキルフェノール系樹脂およびクマロンインデン系樹脂よりなる群から選ばれる少なくとも一種類であることが好ましい。   The resin composition of the present invention may further contain an oligomer (C) having an alicyclic structure and / or an aromatic cyclic structure. By blending this oligomer (C) into the ethylene / vinyl acetate copolymer (A), the refractive index of the mixture of both changes in proportion to the concentration of the oligomer (C), so that the refractive index can be easily adjusted. Become. The type of oligomer is not particularly limited, but is preferably at least one selected from the group consisting of petroleum resins, terpene resins, rosin resins, xylene resins, alkylphenol resins, and coumarone indene resins.

前記の脂環構造および/または芳香族環状構造を有するオリゴマー(C)については、水添処理を施したものであることが好ましい。水添処理を施すことにより構造中の不飽和結合が減少するため、臭気の減少、色相の改善、加熱安定性の向上などの効果が期待できる。   The oligomer (C) having the alicyclic structure and / or the aromatic cyclic structure is preferably subjected to hydrogenation treatment. Since the unsaturated bond in the structure is reduced by performing the hydrogenation treatment, effects such as reduction in odor, improvement in hue, and improvement in heating stability can be expected.

また、前記の脂環構造および/または芳香族環状構造を有するオリゴマー(C)は、軟化点が100℃以上であることが好ましい。これらのオリゴマーは、一般的に軟化点より40〜50℃低いガラス転移点を有しており、軟化点が100℃以上であれば本発明の樹脂組成物の実用温度域(0〜40℃)よりも高いガラス転移点を有する。よって、実用温度域においてはオリゴマー(C)の性質は変化することがなく、安定した温度感応性を示すことが期待できる。さらに、成形品表面への移動が抑制されてべたつき等の問題が起こりにくくなるため好ましい。   Moreover, it is preferable that the oligomer (C) which has the said alicyclic structure and / or aromatic cyclic structure has a softening point of 100 degreeC or more. These oligomers generally have a glass transition point lower by 40 to 50 ° C. than the softening point, and if the softening point is 100 ° C. or higher, the practical temperature range (0 to 40 ° C.) of the resin composition of the present invention. Higher glass transition point. Therefore, in the practical temperature range, the property of the oligomer (C) does not change, and it can be expected to show stable temperature sensitivity. Furthermore, it is preferable because movement to the surface of the molded product is suppressed and problems such as stickiness are less likely to occur.

前記の脂環構造および/または芳香族環状構造を有するオリゴマー(C)の配合比率については、(A)と(B)の組成物100重量部に対して、0.1〜30重量部が好ましい。   About the compounding ratio of the oligomer (C) which has the said alicyclic structure and / or aromatic cyclic structure, 0.1-30 weight part is preferable with respect to 100 weight part of compositions of (A) and (B). .

本発明の樹脂組成物には、エチレン・酢酸ビニル共重合体(A)と環状オレフィンコポリマー(B)の界面の接着性を向上させるために、相溶化剤を配合してもよい。   The resin composition of the present invention may contain a compatibilizing agent in order to improve the adhesiveness at the interface between the ethylene / vinyl acetate copolymer (A) and the cyclic olefin copolymer (B).

本発明の樹脂組成物は、樹脂の混合に通常使用される方法を用いることができ、例えば溶融・混合方法として、単軸押出機や二軸押出機を用いた押出混練、ロール混練など公知の方法を挙げることができ、該方法で溶融混練することにより得ることができる。   The resin composition of the present invention can use a method usually used for resin mixing. For example, as a melting / mixing method, known methods such as extrusion kneading using a single screw extruder or twin screw extruder, roll kneading, etc. The method can be mentioned, and can be obtained by melt-kneading by this method.

本発明の樹脂組成物は、成形して該樹脂組成物を少なくとも1層含むフィルムとして使用することができる。その形態については特に制約はなく、単層のフィルム、該樹脂組成物からなる層の片面もしくは両面に透明樹脂層を配した多層フィルムを例示することができる。   The resin composition of the present invention can be molded and used as a film containing at least one layer of the resin composition. There is no restriction | limiting in particular about the form, The multilayer film which has arrange | positioned the transparent resin layer on the single side | surface or both surfaces of the layer which consists of this resin composition can be illustrated.

前記の多層フィルムを構成する透明樹脂層に用いる透明樹脂については特に制約はないが、透明性と成形加工性が良好であることからオレフィン系重合体が好ましい。オレフィン系重合体としては、低密度ポリエチレン、エチレン・α−オレフィン共重合体、エチレン・酢酸ビニル共重合体ケン化物、エチレン・(メタ)アクリル酸共重合体、エチレン・(メタ)アクリル酸エステル共重合体およびポリプロピレンなどが例示できる。   Although there is no restriction | limiting in particular about the transparent resin used for the transparent resin layer which comprises the said multilayer film, An olefin polymer is preferable from transparency and a favorable moldability. Examples of the olefin polymer include low density polyethylene, ethylene / α-olefin copolymer, saponified ethylene / vinyl acetate copolymer, ethylene / (meth) acrylic acid copolymer, ethylene / (meth) acrylic acid ester copolymer. Examples thereof include a polymer and polypropylene.

前記フィルムの厚みについては特に制約はないが、本発明の樹脂組成物からなる層の厚みは、10μm〜5mmであることが好ましく、さらに好ましくは30μm〜2mm、特に好ましくは50μm〜1mmである。なお、フィルムはその厚みによっては、シートと呼ばれることもある。   Although there is no restriction | limiting in particular about the thickness of the said film, It is preferable that the thickness of the layer which consists of a resin composition of this invention is 10 micrometers-5 mm, More preferably, they are 30 micrometers-2 mm, Most preferably, they are 50 micrometers-1 mm. The film may be called a sheet depending on the thickness.

前記フィルムの成形方法には特に制約はなく、公知のフィルム成形方法を使用することができる。成形方法としては、インフレーション成形法、共押出インフレーション成形法、Tダイ成形法、共押出Tダイ成形法、ドライラミネート成形法、押出ラミネート成形法、共押出ラミネート成形法、サンドラミネート成形法、カレンダー成形法、圧縮成形法などを例示できる。   There is no restriction | limiting in particular in the shaping | molding method of the said film, A well-known film shaping | molding method can be used. Molding methods include inflation molding, co-extrusion inflation molding, T-die molding, co-extrusion T-die molding, dry lamination molding, extrusion lamination molding, co-extrusion lamination molding, sand lamination molding, calendar molding. Method, compression molding method and the like.

また、本発明の樹脂組成物は、一対の透明ガラス板および/または透明樹脂板で挟持した積層体として使用することができる。   Moreover, the resin composition of this invention can be used as a laminated body pinched | interposed with a pair of transparent glass plate and / or a transparent resin plate.

前記の透明ガラス板および透明樹脂板の材質については特に制約はなく、市販のガラス板、ポリカーボネート樹脂板、アクリル樹脂板などを使用することができる。   There is no restriction | limiting in particular about the material of the said transparent glass plate and a transparent resin plate, A commercially available glass plate, a polycarbonate resin plate, an acrylic resin plate etc. can be used.

また、前記積層体の形態としては特に制約はなく、透明ガラス板/樹脂組成物/透明ガラス板、透明樹脂板/樹脂組成物/透明樹脂板、透明ガラス板/樹脂組成物/透明樹脂板などの形態を例示することができる。また、樹脂組成物と透明ガラス板の間および樹脂組成物と透明樹脂板の間には、それ以外の透明樹脂層を設けることもできる。   Moreover, there is no restriction | limiting in particular as a form of the said laminated body, A transparent glass plate / resin composition / transparent glass plate, a transparent resin plate / resin composition / transparent resin plate, a transparent glass plate / resin composition / transparent resin plate, etc. The form of can be illustrated. Moreover, other transparent resin layers can also be provided between the resin composition and the transparent glass plate and between the resin composition and the transparent resin plate.

本発明の樹脂組成物は、夏季と冬季で異なった光線透過性能が要求され、さらに軽量であることが必要な農業用フィルムとして最も好適に使用されるが、他にも住居用資材、および自動車用資材などとしても好適に使用することができる。   The resin composition of the present invention is most preferably used as an agricultural film that requires different light transmission performance in summer and winter and needs to be lighter. It can be suitably used as a material for use.

本発明の樹脂組成物は、環境の温度によって光線透過性が変化する性質を有し、さらに比重が小さいため、感温性調光フィルムや住居用資材、自動車用資材の軽量化、作業性向上に寄与する。   The resin composition of the present invention has the property that the light transmittance changes depending on the temperature of the environment, and further has a low specific gravity, so the temperature-sensitive light-adjusting film, residential materials, and automotive materials are lightened and workability is improved. Contribute to.

以下、実施例により本発明をさらに詳細に説明するが、本発明はこれらの実施例に限定されるものではない。
(1)物性評価方法
以下に、各物性の評価方法を示す。
(1−1)光線透過性
厚み1mmのプレス板を評価用試料とし、文字の印刷された紙を試料から7mm離れた位置に試料と平行に配置した。試料を通して紙の文字を目視し、その見え方で光線透過性を判定した。以下にその基準を示す。
EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to these Examples.
(1) Physical property evaluation method Below, the evaluation method of each physical property is shown.
(1-1) Light Transmittance A press plate having a thickness of 1 mm was used as a sample for evaluation, and a paper on which characters were printed was placed in parallel with the sample at a position 7 mm away from the sample. Paper characters were visually observed through the sample, and the light transmittance was determined based on the appearance. The criteria are shown below.

5:クリアに判読可能
4:判読可能だが、若干かすむ
3:判読可能
2:文字と認識できるが、判読不可
1:文字と認識できない
0:不透明
環境温度が5℃、25℃および45℃の状態で光線透過性の試験を行った。
(1−2)密度
JIS K7112:1999に準拠して測定した。
(1−3)成形性
本発明の組成物を用いて成形した厚み1mmのプレス板を目視で観察し、光線透過性にムラが認められた場合は×、ムラがない場合を○とした。
(2)材料
実施例および比較例に用いた材料は、以下のとおりである。
5: Clearly readable 4: Slightly readable but slightly hazy 3: Recognizable 2: Recognizable as characters but not readable 1: Unrecognizable as characters 0: Opaque Environmental temperatures of 5 ° C, 25 ° C and 45 ° C The light transmission test was conducted.
(1-2) Density The density was measured according to JIS K7112: 1999.
(1-3) Formability A press plate having a thickness of 1 mm formed using the composition of the present invention was visually observed.
(2) Material The material used for the Example and the comparative example is as follows.

(2−1)エチレン・酢酸ビニル共重合体(A)およびその他の材料
A−1:エチレン・酢酸ビニル共重合体(商品名)「ウルトラセン626」(東ソー(株)製) 酢酸ビニル含量15重量%、190℃で測定したメルトフローレート(以下、MFR)3.0g/10分、密度0.936g/cm、25℃における屈折率1.498
A−2:エチレン・酢酸ビニル共重合体(商品名)「ウルトラセン537」(東ソー(株)製) 酢酸ビニル含量6重量%、MFR8.5g/10分、密度0.925g/cm、25℃における屈折率1.506
A−3:エチレン・酢酸ビニル共重合体(商品名)「ウルトラセン634」(東ソー(株)製) 酢酸ビニル含量26重量%、MFR4.3g/10分、密度0.949g/cm、25℃における屈折率1.489
なお、屈折率はJIS K7142 A法に準拠し、1−ブロモナフタレンを接触液としてアッベ屈折計NAR−1T(アタゴ社製)を用いて、25℃、50%Rhの条件下で測定した。
(2-1) Ethylene / vinyl acetate copolymer (A) and other materials A-1: Ethylene / vinyl acetate copolymer (trade name) “Ultrasen 626” (manufactured by Tosoh Corporation) Vinyl acetate content 15 % By weight, melt flow rate (hereinafter referred to as MFR) measured at 190 ° C. 3.0 g / 10 min, density 0.936 g / cm 3 , refractive index 1.498 at 25 ° C.
A-2: Ethylene / vinyl acetate copolymer (trade name) “Ultrasen 537” (manufactured by Tosoh Corporation) Vinyl acetate content 6% by weight, MFR 8.5 g / 10 min, density 0.925 g / cm 3 , 25 Refractive index at ℃ 1.506
A-3: Ethylene / vinyl acetate copolymer (trade name) “Ultrasen 634” (manufactured by Tosoh Corporation) Vinyl acetate content 26% by weight, MFR 4.3 g / 10 min, density 0.949 g / cm 3 , 25 Refractive index at ℃ 1.489
The refractive index was measured under the conditions of 25 ° C. and 50% Rh using an Abbe refractometer NAR-1T (manufactured by Atago Co., Ltd.) using 1-bromonaphthalene as a contact liquid according to JIS K7142 A method.

各々の材料の性状を、表1にまとめた。   The properties of each material are summarized in Table 1.

Figure 2017071696
(2−2)環状オレフィンコポリマー(B)およびその他の材料
B−1:環状オレフィンコポリマー(商品名)「ARTON F4520」((株)JSR製) ガラス転移点164℃、25℃における屈折率1.512、密度1.08g/cm
B−2:環状オレフィンコポリマー(商品名)「TOPAS 6013」(ポリプラスチックス(株)製) ガラス転移点138℃、25℃における屈折率1.530、密度1.01g/cm
B−3:ポリメタクリル酸メチル樹脂(商品名)「パラペット G1000」(クラレ(株)製) ガラス転移点100℃、25℃における屈折率1.493、密度1.20g/cm
B−4:ゼオライト(アルミノシリケート)(商品名)「シルトン JC−30」(水澤化学工業(株)製) 25℃における屈折率1.502、密度2.49g/cm
各々の材料の性状を、表2にまとめた。
Figure 2017071696
(2-2) Cyclic olefin copolymer (B) and other materials B-1: Cyclic olefin copolymer (trade name) “ARTON F4520” (manufactured by JSR Co., Ltd.) Refractive index at glass transition temperatures of 164 ° C. and 25 ° C. 512, density 1.08 g / cm 3
B-2: Cyclic olefin copolymer (trade name) “TOPAS 6013” (manufactured by Polyplastics Co., Ltd.) Glass transition point 138 ° C., refractive index 1.530 at 25 ° C., density 1.01 g / cm 3
B-3: Polymethyl methacrylate resin (trade name) “Parapet G1000” (manufactured by Kuraray Co., Ltd.) Glass transition point 100 ° C., refractive index 1.493 at 25 ° C., density 1.20 g / cm 3
B-4: Zeolite (aluminosilicate) (trade name) “Silton JC-30” (manufactured by Mizusawa Chemical Co., Ltd.) Refractive index at 25 ° C. 1.502, density 2.49 g / cm 3
The properties of each material are summarized in Table 2.

Figure 2017071696
〔実施例1〕
A−1 70重量%とB−1 30重量%を、210℃に保持したミキサー((株)東洋精機製作所製 ラボプラストミル30C−150にR−100ミキサーを接続)に投入し、回転数30rpmで10分間混練した。混練後の樹脂組成物を溶融したまま取り出した後に冷却し、これを180℃で厚み1mmにプレス成形した。
Figure 2017071696
[Example 1]
70% by weight of A-1 and 30% by weight of B-1 were put into a mixer maintained at 210 ° C. (with R-100 mixer connected to Labo Plast Mill 30C-150, manufactured by Toyo Seiki Seisakusho Co., Ltd.) and rotated at 30 rpm. For 10 minutes. The kneaded resin composition was taken out while being melted, cooled, and press molded at 180 ° C. to a thickness of 1 mm.

この試料を、(1−1)〜(1−3)に示した方法で性能および性状を測定した。結果を表3に示す。   The performance and properties of this sample were measured by the methods shown in (1-1) to (1-3). The results are shown in Table 3.

〔実施例2〕
A−1の配合比率を90重量%に、B−1の配合比率を10重量%に変更した以外は、実施例1と同様の方法で試料の調製および性能と性状の測定を行った。結果を表3に示す。
[Example 2]
A sample was prepared and performance and properties were measured in the same manner as in Example 1 except that the blending ratio of A-1 was changed to 90% by weight and the blending ratio of B-1 was changed to 10% by weight. The results are shown in Table 3.

〔実施例3〕
A−1の代わりにA−2を使用した以外は、実施例1と同様の方法で試料の調製および性能と性状の測定を行った。結果を表3に示す。
Example 3
A sample was prepared and performance and properties were measured in the same manner as in Example 1 except that A-2 was used instead of A-1. The results are shown in Table 3.

〔実施例4〕
B−1の代わりにB−2を使用した以外は、実施例3と同様の方法で試料の調製および性能と性状の測定を行った。結果を表3に示す。
Example 4
A sample was prepared and performance and properties were measured in the same manner as in Example 3 except that B-2 was used instead of B-1. The results are shown in Table 3.

Figure 2017071696
〔比較例1〕
A−1の配合比率を100重量%に変更しB−1を配合しなかった以外は、実施例1と同様の方法で試料の調製および性能と性状の測定を行った。結果を表4に示す。5℃と45℃の光線透過性の差がなく、感温性調光性能が認められなかった。
Figure 2017071696
[Comparative Example 1]
The sample was prepared and the performance and properties were measured in the same manner as in Example 1 except that the blending ratio of A-1 was changed to 100% by weight and B-1 was not blended. The results are shown in Table 4. There was no difference in light transmittance between 5 ° C. and 45 ° C., and no temperature-sensitive light control performance was observed.

〔比較例2〕
A−1の配合比率を30重量%に、B−1の配合比率を70重量%に変更した以外は、実施例1と同様の方法で試料の調製および性能と性状の測定を行った。結果を表4に示す。組成物の密度が大きくなった。また、成形性が悪化した。
[Comparative Example 2]
The sample was prepared and the performance and properties were measured in the same manner as in Example 1 except that the blending ratio of A-1 was changed to 30% by weight and the blending ratio of B-1 was changed to 70% by weight. The results are shown in Table 4. The density of the composition increased. Moreover, the moldability deteriorated.

〔比較例3〕
B−1の代わりにB−3を使用した以外は、実施例1と同様の方法で試料の調製および性能と性状の測定を行った。結果を表4に示す。組成物の密度が大きくなった。また、5℃と45℃の光線透過性の差がなく、感温性調光性能が認められなかった。
[Comparative Example 3]
A sample was prepared and performance and properties were measured in the same manner as in Example 1 except that B-3 was used instead of B-1. The results are shown in Table 4. The density of the composition increased. Further, there was no difference in light transmittance between 5 ° C. and 45 ° C., and no temperature-sensitive dimming performance was observed.

〔比較例4〕
A−1の代わりにA−3を使用した以外は、比較例3と同様の方法で試料の調製および性能と性状の測定を行った。結果を表4に示す。感温性調光性能は認められたが、組成物の密度が大きかった。
[Comparative Example 4]
A sample was prepared and performance and properties were measured in the same manner as in Comparative Example 3 except that A-3 was used instead of A-1. The results are shown in Table 4. Although the temperature-sensitive light control performance was recognized, the density of the composition was large.

〔比較例5〕
B−1の代わりにB−4を使用した以外は、実施例2と同様の方法で試料の調製および性能と性状の測定を行った。結果を表4に示す。組成物の密度が大きかった。
[Comparative Example 5]
A sample was prepared and performance and properties were measured in the same manner as in Example 2 except that B-4 was used instead of B-1. The results are shown in Table 4. The density of the composition was high.

Figure 2017071696
Figure 2017071696

Claims (6)

酢酸ビニル含有率が5〜50重量%のエチレン・酢酸ビニル共重合体(A)50〜99重量%及び密度が1.10g/cm以下である環状オレフィンコポリマー(B)50〜1重量%((A)と(B)の合計は100重量%)を含む樹脂組成物。 50 to 99% by weight of ethylene / vinyl acetate copolymer (A) having a vinyl acetate content of 5 to 50% by weight and 50 to 1% by weight of cyclic olefin copolymer (B) having a density of 1.10 g / cm 3 or less ( (A) and (B) are 100% by weight in total). 環状オレフィンコポリマー(B)の25℃における屈折率が1.490〜1.520であることを特徴とする、請求項1に記載の樹脂組成物。 The resin composition according to claim 1, wherein the cyclic olefin copolymer (B) has a refractive index of 1.490 to 1.520 at 25 ° C. 環状オレフィンコポリマー(B)のガラス転移点が40℃以上であることを特徴とする、請求項1又は2に記載の樹脂組成物。 The resin composition according to claim 1 or 2, wherein the cyclic olefin copolymer (B) has a glass transition point of 40 ° C or higher. 請求項1〜3のいずれかに記載の樹脂組成物において、エチレン・酢酸ビニル共重合体(A)と環状オレフィンコポリマー(B)を含む樹脂組成物100重量部に対して、さらに脂環構造および/または芳香族環状構造を有するオリゴマー(C)を0.1〜30重量部含有することを特徴とする樹脂組成物。 In the resin composition in any one of Claims 1-3, with respect to 100 weight part of resin compositions containing an ethylene-vinyl acetate copolymer (A) and a cyclic olefin copolymer (B), an alicyclic structure and A resin composition comprising 0.1 to 30 parts by weight of an oligomer (C) having an aromatic cyclic structure. 請求項1〜4のいずれかに記載の樹脂組成物からなる層を少なくとも1層含むことを特徴とする、フィルム。 A film comprising at least one layer comprising the resin composition according to claim 1. 請求項1〜4のいずれかに記載の樹脂組成物が、一対の透明ガラス板および/または透明樹脂板で挟持されてなることを特徴とする積層体。   A laminate comprising the resin composition according to claim 1 sandwiched between a pair of transparent glass plates and / or transparent resin plates.
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