JP2020132682A - Resin composition, resin molded article, and method for producing resin composition - Google Patents
Resin composition, resin molded article, and method for producing resin composition Download PDFInfo
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本発明は、廃棄する際の環境負荷が小さい樹脂組成物、および、その樹脂組成物によって形成される生活用品、台所用品、事務用品、インテリア用品、土木建築用資材等の各種の樹脂成形品に関するものである。 The present invention relates to a resin composition having a small environmental load when disposed of, and various resin molded products such as daily necessities, kitchen supplies, office supplies, interior supplies, civil engineering and construction materials, etc. formed by the resin composition. It is a thing.
生活用品、台所用品、事務用品、インテリア用品、土木建築用資材等の各種の製品を製造する際の原料として、各種の合成樹脂が広く用いられている。たとえば、食品、薬品、化粧品等の各種の液体や粉体等を包装・収納するための包装材料としては、合成樹脂製のフィルムからなる包装袋が多く使用されている（特許文献１）。 Various synthetic resins are widely used as raw materials for manufacturing various products such as daily necessities, kitchen supplies, office supplies, interior goods, and civil engineering and construction materials. For example, as a packaging material for packaging and storing various liquids and powders of foods, chemicals, cosmetics, etc., a packaging bag made of a synthetic resin film is often used (Patent Document 1).
一方、近年では、廃棄された合成樹脂を燃焼させる際に排出されるＣＯ２が環境問題になっているが、上記従来の合成樹脂製の製品（たとえば、包装フィルムや包装袋等）は、燃焼時に多くのＣＯ２を排出させるものであるため、廃棄時の環境負荷が小さいとは言い難い。それゆえ、特許文献２の如く、カーボンニュートラルな性質（燃やしても大気中のＣＯ２の増減に影響を与えない性質）を有する竹等の木質材を、主原料である合成樹脂中に添加した樹脂組成物によって合成樹脂フィルムを製造する技術も開発されている。 On the other hand, in recent years, CO 2 emitted when burning discarded synthetic resin has become an environmental problem, but the above-mentioned conventional synthetic resin products (for example, packaging films and packaging bags) are burned. Since it emits a large amount of CO 2 at times, it cannot be said that the environmental load at the time of disposal is small. Therefore, as in Patent Document 2, a wood material such as bamboo having a carbon-neutral property (a property that does not affect the increase or decrease of CO 2 in the atmosphere even when burned) is added to the synthetic resin as the main raw material. A technique for producing a synthetic resin film from a resin composition has also been developed.
しかしながら、特許文献２の如き従来の木質材入りの合成樹脂フィルムは、主原料である合成樹脂中に竹材からなる粒子を単純に添加して製造するものであるため、合成樹脂と木質材との馴染みが悪く、成形品中にボイドやクラックを発生しやすい上、合成樹脂中における木質材粒子の分散性が悪いことに起因して合成樹脂本来の特性が発現されにくい、という不具合がある。 However, the conventional synthetic resin film containing wood material as in Patent Document 2 is produced by simply adding particles made of bamboo material to the synthetic resin which is the main raw material, and therefore, the synthetic resin and the wood material are used. There is a problem that the familiarity is poor, voids and cracks are likely to occur in the molded product, and the original characteristics of the synthetic resin are not easily exhibited due to the poor dispersibility of the wood material particles in the synthetic resin.
本発明の目的は、上記従来の樹脂成形品の成形原料である樹脂組成物が有する問題点を解消し、カーボンニュートラルな性質を有する物質を含有しており、成形品の廃棄時の環境負荷が小さいにもかかわらず、その物質と合成樹脂との馴染みが良好であり、成形品の成形時にボイドやクラックが形成されにくく、合成樹脂本来の特性を発現する成形品を成形可能な樹脂組成物を提供することにある。また、当該樹脂組成物によって形成される廃棄時の環境負荷が小さく、かつ、合成樹脂本来の特性を発現可能な成形品を提供することにある。 An object of the present invention is to solve the problems of the resin composition which is a molding raw material of the conventional resin molded product, to contain a substance having carbon-neutral properties, and to increase the environmental load at the time of disposal of the molded product. Despite its small size, a resin composition that has good compatibility between the substance and the synthetic resin, is less likely to form voids and cracks during molding of the molded product, and can form a molded product that exhibits the original characteristics of the synthetic resin. To provide. Another object of the present invention is to provide a molded product formed by the resin composition, which has a small environmental load at the time of disposal and can exhibit the original characteristics of a synthetic resin.
本発明の内、請求項１に記載された発明は、合成樹脂と植物由来材の粒子とを混合してなる樹脂組成物であって、前記合成樹脂がポリオレフィン系樹脂であり、前記植物由来材が餡殻（あんがら）であるとともに、下記の式１に示す餡殻の粒子とポリオレフィン系樹脂との混合割合が、１％以上７０％以下であることを特徴とするものである。
（餡殻の粒子とポリオレフィン系樹脂との混合割合）＝（餡殻の粒子の質量）／[（餡殻の粒子の質量）＋（ポリオレフィン系樹脂の質量）］ ・・式１
The invention according to claim 1 of the present invention is a resin composition obtained by mixing a synthetic resin and particles of a plant-derived material, wherein the synthetic resin is a polyolefin resin and the plant-derived material is used. Is an angara, and the mixing ratio of the particles of the husk represented by the following formula 1 and the polyolefin-based resin is 1% or more and 70% or less.
(Mixing ratio of husk particles and polyolefin resin) = (mass of husk particles) / [(mass of husk particles) + (mass of polyolefin resin)] ・ ・ Equation 1
請求項２に記載された発明は、請求項１に記載された発明において、前記餡殻の粒子とポリオレフィン系樹脂との混合割合が２％以上３０％以下であることを特徴とするものである。 The invention according to claim 2 is characterized in that, in the invention according to claim 1, the mixing ratio of the particles of the bean paste shell and the polyolefin resin is 2% or more and 30% or less. ..
請求項３に記載された発明は、請求項１、または請求項２に記載された発明において、メルトフローレート（ＭＦＲ）が２以上２５以下に調整されていることを特徴とするものである。 The invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the melt flow rate (MFR) is adjusted to 2 or more and 25 or less.
請求項４に記載された発明は、請求項１〜３のいずれかに記載された発明において、前記餡殻の粒子の平均粒子径が５μｍ以上２００μｍ以下であることを特徴とするものである。 The invention according to claim 4 is characterized in that, in the invention according to any one of claims 1 to 3, the average particle size of the particles of the bean paste shell is 5 μm or more and 200 μm or less.
請求項５に記載された発明は、請求項１〜３のいずれかに記載された発明において、前記餡殻の粒子の平均粒子径が５０μｍ以上３ｍｍ以下であることを特徴とするものである。 The invention according to claim 5 is characterized in that, in the invention according to any one of claims 1 to 3, the average particle size of the particles of the bean paste shell is 50 μm or more and 3 mm or less.
請求項６に記載された発明は、請求項１〜５のいずれかに記載された発明において、前記ポリオレフィン系樹脂が、酸変性処理されたものを含むことを特徴とする。 The invention according to claim 6 is characterized in that, in the invention according to any one of claims 1 to 5, the polyolefin-based resin is acid-modified.
請求項７に記載された発明は、請求項１〜６のいずれかに記載された発明において、前記餡殻の粒子が、アセチル化処理されたものであることを特徴とする。 The invention according to claim 7 is characterized in that, in the invention according to any one of claims 1 to 6, the particles of the bean paste shell are acetylated.
請求項８に記載された発明は、請求項１〜３，５〜７のいずれかに記載の樹脂組成物によって形成されていることを特徴とするスプーンまたはフォークである。 The invention according to claim 8 is a spoon or fork, which is formed by the resin composition according to any one of claims 1 to 3, 5 to 7.
請求項９に記載された発明は、請求項１〜４，６，７のいずれかに記載の樹脂組成物によって形成されていることを特徴とするフィルムまたはシートである。 The invention according to claim 9 is a film or sheet characterized by being formed by the resin composition according to any one of claims 1 to 4, 6 and 7.
請求項１０に記載された発明は、請求項１〜７のいずれかに記載の樹脂組成物の製造方法であって、餡殻の粒子を乾燥させる乾燥工程と、その乾燥工程によって乾燥させた餡殻の粒子を、溶融させたポリオレフィン系樹脂中に添加して混練する混練工程とを有することを特徴とするものである。 The invention according to claim 10 is the method for producing a resin composition according to any one of claims 1 to 7, wherein the drying step of drying the particles of the shell and the drying step of the drying step are used. It is characterized by having a kneading step in which shell particles are added to a molten polyolefin resin and kneaded.
請求項１１に記載された発明は、請求項７に記載の樹脂組成物の製造方法であって、餡殻の粒子をアセチル化する表面処理工程と、その表面処理工程によってアセチル化した餡殻を、溶融させたポリオレフィン系樹脂中に添加して混練する混練工程とを有することを特徴とするものである。 The invention according to claim 11 is the method for producing a resin composition according to claim 7, wherein the surface treatment step of acetylating the particles of the shell and the shell acetylated by the surface treatment step are obtained. It is characterized by having a kneading step of adding and kneading the melted polyolefin resin.
本発明に係る樹脂組成物は、カーボンニュートラルな性質を有する植物由来材である餡殻の粒子を含有しているため、成形品を廃棄する際の環境負荷が小さい。また、それにもかかわらず、餡殻の粒子と合成樹脂との馴染みが良好であるため、ボイドやクラックが少なくポリオレフィン系樹脂本来の特性（高い強度や剛性等）を発現可能な成形品を成形することができる。さらに、本発明に係る樹脂組成物は、餡殻由来の独特な風合いや質感を成形品に付与することができる。それゆえ、本発明に係る樹脂組成物は、合成樹脂フィルム、食器、スプーン、フォーク等の生活用品、台所用品、事務用品、インテリア用品、土木建築用資材等の各種の用途に幅広く利用することができる。 Since the resin composition according to the present invention contains particles of bean paste, which is a plant-derived material having carbon-neutral properties, the environmental load when disposing of the molded product is small. In spite of this, since the particles of the bean paste and the synthetic resin are well-adapted, a molded product that has few voids and cracks and can exhibit the original characteristics of the polyolefin resin (high strength, rigidity, etc.) is molded. be able to. Further, the resin composition according to the present invention can impart a unique texture and texture derived from bean paste to the molded product. Therefore, the resin composition according to the present invention can be widely used for various purposes such as synthetic resin films, tableware, spoons, forks and other daily necessities, kitchen utensils, office supplies, interior goods, civil engineering and construction materials, and the like. it can.
また、本発明に係るスプーン、フォークは、餡殻由来の独特な風合いや質感を有しているため、和食に供する食事用品として好適に用いることができる上、ポリオレフィン系樹脂本来の高い強度や剛性等の特性が損なわれていないため、破損しにくく、長期間に亘って使用することができる。さらに、本発明に係るスプーン、フォークは、使用時に、餡殻由来の独特で滑らかな舌触りを提供することができる。 Further, since the spoon and fork according to the present invention have a unique texture and texture derived from bean paste, they can be suitably used as meal products to be used for Japanese food, and also have high strength and rigidity inherent in polyolefin resins. Since the characteristics such as the above are not impaired, it is not easily damaged and can be used for a long period of time. Furthermore, the spoons and forks according to the present invention can provide a unique and smooth texture derived from bean paste when used.
一方、本発明に係るフィルム・シートは、餡殻由来の独特な風合いや質感を有しており、通常の合成樹脂製のフィルム・シートとは異なる色を呈するため、広範囲の印刷を施さなくても良好な意匠性を発現することができる。さらに、本発明に係るフィルム・シートは、ポリオレフィン系樹脂本来の高い強度や剛性等の特性が損なわれていないため、破損しにくく、長期間に亘って使用することができる。 On the other hand, the film sheet according to the present invention has a unique texture and texture derived from bean paste, and exhibits a color different from that of a normal synthetic resin film sheet, so that a wide range of printing is not required. Can also exhibit good design. Further, the film / sheet according to the present invention is not easily damaged because the properties such as high strength and rigidity inherent in the polyolefin resin are not impaired, and can be used for a long period of time.
一方、本発明に係る樹脂組成物の製造方法によれば、成形品の廃棄時の環境負荷が小さく、かつ、ポリオレフィン系樹脂本来の特性を発現可能な成形品を成形可能な樹脂組成物を、短時間で効率的に製造することができる。 On the other hand, according to the method for producing a resin composition according to the present invention, a resin composition capable of molding a molded product having a small environmental load at the time of disposal of the molded product and capable of exhibiting the original characteristics of a polyolefin resin can be obtained. It can be manufactured efficiently in a short time.
以下、本発明の好適な実施形態について詳細に説明する。なお、以下の説明においては、各成分の特性、含有量、添加量に関する“〜”は、原則的に、左側の数値以上右側の数値以下を意味するものとする。 Hereinafter, preferred embodiments of the present invention will be described in detail. In the following description, "~" regarding the characteristics, content, and addition amount of each component means, in principle, not less than the value on the left side but not more than the value on the right side.
本発明に係る樹脂組成物は、ポリオレフィン系樹脂中に、植物由来材である餡殻が所定の割合で添加されたものである。ここでいうポリオレフィン系樹脂とは、ポリオレフィンの比率が概ね８０質量％であるポリオレフィンを主体とする樹脂のことである。かかるポリオレフィンとしては、ポリプロピレン、中密度ポリエチレン、高密度ポリエチレンを単独で、あるいは、それらの内の２種以上を混合して用いることができる。また、ポリオレフィン系樹脂として、マレイン酸変性ポリエチレン、マレイン酸変性ポリプロピレン等、グラフト変性されたポリオレフィンを単独で、あるいは、それらの内の２種以上を混合したものを用いると、樹脂組成物中のポリオレフィン系樹脂と餡殻の粒子との親和性（馴染み）が良好なものとなり、成形品を成形する際にボイドやクラックが形成されにくくなるので好ましい。２種以上の樹脂の混合の組み合わせとしては、変性をしていない樹脂とマレイン酸変性がなされた樹脂とを混練することができ、強度、コストの観点からも好ましい。たとえば、変性ポリプロピレンとマレイン酸変性ポリプロピレンとの混合とすることができ、混合比は１：１０〜１０：１とすることができ、１：３〜３：１とすることも好ましい。 The resin composition according to the present invention is a polyolefin-based resin in which bean paste, which is a plant-derived material, is added in a predetermined ratio. The polyolefin-based resin referred to here is a resin mainly composed of polyolefin in which the proportion of polyolefin is approximately 80% by mass. As the polyolefin, polypropylene, medium-density polyethylene, and high-density polyethylene can be used alone or in combination of two or more of them. Further, as the polyolefin-based resin, when a graft-modified polyolefin such as maleic acid-modified polyethylene or maleic acid-modified polypropylene is used alone or in combination of two or more of them, the polyolefin in the resin composition is used. It is preferable because the affinity (familiarity) between the based resin and the particles of the polyolefin is good, and voids and cracks are less likely to be formed when molding the molded product. As a combination of two or more kinds of resins, the unmodified resin and the maleic acid-modified resin can be kneaded, which is preferable from the viewpoint of strength and cost. For example, it can be a mixture of modified polypropylene and maleic acid-modified polypropylene, and the mixing ratio can be 1:10 to 10: 1, and preferably 1: 3 to 3: 1.
また、本発明でいう餡殻とは、小豆やインゲン豆等の種皮部分のことであり、小豆やインゲン豆（白餡用の豆）から餡子を製造する際に取り除かれる煮沸後の小豆やインゲン豆の皮を好適に用いることができる。当該餡殻をポリオレフィン系樹脂に添加するためには、分級粉砕機等の粉砕装置等を利用して餡殻を粒子状に粉砕する必要がある。 Further, the bean paste shell referred to in the present invention is a seed coat portion of azuki beans, green beans, etc., and is removed from red beans and green beans (beans for white bean paste) when producing red bean paste. Bean skin can be preferably used. In order to add the bean paste to the polyolefin resin, it is necessary to pulverize the bean paste into particles using a crushing device such as a classification crusher.
餡殻の粒子の大きさは、特に限定されないが、樹脂組成物を、食器、スプーン、フォーク等の食事用具、台所用品、インテリア用品等の立体的な成形品を成形するための原料とする場合には、平均粒子径（粒子の直径）を５０μｍ〜３ｍｍに調整すると、樹脂組成物の調製が容易となる上、成形品の特性を損なうことなく（すなわち、ポリオレフィン系樹脂本来の強度や剛性を発現させつつ）、成形品に餡殻独特の風合い・質感を付与しやすくなるので好ましい。 The size of the particles of the husk is not particularly limited, but when the resin composition is used as a raw material for molding three-dimensional molded products such as tableware, spoons, forks and other eating utensils, kitchen utensils, interior products and the like. If the average particle size (particle diameter) is adjusted to 50 μm to 3 mm, the resin composition can be easily prepared and the properties of the molded product are not impaired (that is, the original strength and rigidity of the polyolefin resin can be maintained. (While expressing), it is preferable because it makes it easier to give the molded product a texture and texture peculiar to the shell.
一方、樹脂組成物を、フィルムやシート等の二次元的な成形品を成形するための原料とする場合には、平均粒子径（粒子の直径）を５〜２００μｍに調整すると、ボイドやクラックがなくポリオレフィン系樹脂本来の強度や剛性を発現可能なフィルムやシート等が得られるので好ましい。なお、粒子径は、数平均径として、顕微鏡の画像解析により得ることができ、粒子１００点の直径（粒子が円形でない場合には長径）の平均値を採用することができる。また、餡殻の粒子として、表面をアセチル化処理（酢酸への浸漬処理等）した粒子を用いると、ポリオレフィン系樹脂との親和性（馴染み）が一段と良好なものとなり、成形品にボイドやクラックがよりできにくくなるので好ましい。なお、本発明に係る樹脂組成物の主原料として、マレイン酸変性ポリエチレン、マレイン酸変性ポリプロピレン等の酸変性されたポリオレフィン系樹脂を使用せず、通常のポリオレフィン系樹脂を用いる場合には、餡殻の粒子として、表面をアセチル化したものを用いることが樹脂組成物の調製において不可欠となる。 On the other hand, when the resin composition is used as a raw material for molding a two-dimensional molded product such as a film or a sheet, if the average particle diameter (particle diameter) is adjusted to 5 to 200 μm, voids and cracks are generated. It is preferable because a film or sheet capable of exhibiting the original strength and rigidity of the polyolefin resin can be obtained. The particle diameter can be obtained by image analysis of a microscope as a number average diameter, and the average value of the diameters of 100 particles (major diameter when the particles are not circular) can be adopted. In addition, when particles whose surface is acetylated (immersed in acetic acid, etc.) are used as the particles of the bean paste, the affinity (familiarity) with the polyolefin resin becomes even better, and voids and cracks are formed in the molded product. Is preferable because it makes it more difficult to form. When an acid-modified polyolefin-based resin such as maleic acid-modified polyethylene or maleic acid-modified polypropylene is not used as the main raw material of the resin composition according to the present invention, and a normal polyolefin-based resin is used, the shell is used. It is indispensable for the preparation of the resin composition to use the particles having an acetylated surface.
また、餡殻の粒子を調製するための方法は、特に限定されないが、乾燥後に粉砕する方法を採用すると、粒子径のバラツキの小さい粒子が得られるので好ましい。図１は、そのように乾燥後に粉砕する方法を採用した餡殻の粒子の調製方法の一例を示したものである。かかる調製方法においては、餡殻を所定の温度（６０〜１５０℃程度）で所定の時間（１時間〜３日間）乾燥させる一次乾燥処理Ｔ１後に、餡殻を粗く粉砕する（平均粒径が３ｍｍ〜５ｍｍ程度になるように粉砕する）粗粉砕処理Ｔ２が実行され、さらに、餡殻をアセチル化するアセチル化処理（表面処理）Ｔ３が実行される。さらに、そのアセチル化処理（表面処理）Ｔ３後に、餡殻を所定の温度（６０〜１５０℃程度）で所定の時間（１〜１０時間）乾燥させる二次乾燥処理Ｔ４が実行され、しかる後に、餡殻を細かく粉砕する（平均粒径が５μｍ〜３ｍｍ程度になるように粉砕する）細粉砕処理Ｔ５が実行される。なお、粗粉砕処理Ｔ２や細粉砕処理Ｔ５においては、単純に粒子を細かく砕くのみならず、大きい粒子を取り除く（分級する）ことも可能である。そのように、粗粉砕処理Ｔ２後にアセチル化処理Ｔ３を実行してから細粉砕処理Ｔ５を実行する調製方法を採用すると、粒子径のバラツキのきわめて小さい粒子が得られるので特に好ましい。なお上記した調整方法は、一部の工程を省略することができ、たとえば、Ｔ３のアセチル化工程を省くことができる。また、Ｔ１の一次乾燥工程の前に餡殻の水分を絞り、水分を除去する工程を設けることもできる。 The method for preparing the particles of the bean paste shell is not particularly limited, but it is preferable to adopt a method of pulverizing after drying because particles having a small variation in particle size can be obtained. FIG. 1 shows an example of a method for preparing bean paste particles, which employs such a method of pulverizing after drying. In such preparation methods, a predetermined time at a predetermined temperature (about 60 to 150 ° C.) Ankara (1 hour to 3 days) after the primary drying process T 1 for drying, the coarsely pulverized Ankara (average particle size The coarse pulverization treatment T 2 ( which pulverizes the bean paste to about 3 mm to 5 mm) is executed, and further, the acetylation treatment (surface treatment) T 3 which acetylates the bean paste is executed. Further, after the acetylation treatment (surface treatment) T 3 , a secondary drying treatment T 4 in which the bean paste is dried at a predetermined temperature (about 60 to 150 ° C.) for a predetermined time (1 to 10 hours) is executed. Later, a fine pulverization treatment T 5 is performed in which the bean paste is finely pulverized (crushed so that the average particle size is about 5 μm to 3 mm). In the coarse pulverization treatment T 2 and the fine pulverization treatment T 5, it is possible not only to simply crush the particles into small pieces but also to remove (classify) large particles. As described above, it is particularly preferable to adopt a preparation method in which the acetylation treatment T 3 is executed after the coarse pulverization treatment T 2 and then the fine pulverization treatment T 5 is executed because particles having extremely small variation in particle size can be obtained. In the above-mentioned adjustment method, some steps can be omitted, and for example, the acetylation step of T 3 can be omitted. Further, a step of squeezing the water content of the bean paste shell to remove the water content can be provided before the primary drying step of T 1 .
一方、餡殻の粒子は、上記したポリオレフィン系樹脂（原料全体）に対して、１〜７０質量％の割合で含有させる必要がある。餡殻の粒子の含有量（添加量）が１％未満であると、餡殻独特の風合いを発現させることができなくなるので好ましくない。反対に、餡殻の粒子の含有量が７０％を上回ると、ポリオレフィン系樹脂本来の特性が発現されにくくなり、成形品の強度や剛性が低下する等の現象が起こりやすくなるので好ましくない。餡殻の粒子の含有量は、２％以上３０％以下であるとより好ましく、５％以上２０％以下であると特に好ましい。加えて、そのように餡殻の粒子を添加したポリオレフィン系樹脂からなる樹脂組成物は、メルトフローレートが５．０以上２５．０以下の範囲内になるように調整すると、成形品を成形するときのハンドリング性（成形加工性）が良くなり、効率良く成形することが可能となるので好ましく、メルトフローレートが１０．０以上１５以下であると、より好ましい。 On the other hand, the particles of the bean paste shell need to be contained in a ratio of 1 to 70% by mass with respect to the above-mentioned polyolefin resin (total raw material). If the content (addition amount) of the particles of the bean paste is less than 1%, the texture peculiar to the bean paste cannot be expressed, which is not preferable. On the other hand, if the content of the particles in the bean paste exceeds 70%, the original characteristics of the polyolefin resin are less likely to be exhibited, and phenomena such as a decrease in the strength and rigidity of the molded product are likely to occur, which is not preferable. The content of the particles of the bean paste is more preferably 2% or more and 30% or less, and particularly preferably 5% or more and 20% or less. In addition, the resin composition composed of the polyolefin-based resin to which the particles of the shell are added is adjusted so that the melt flow rate is within the range of 5.0 or more and 25.0 or less to form a molded product. It is preferable because the handleability (molding workability) at the time is improved and molding can be performed efficiently, and the melt flow rate is more preferably 10.0 or more and 15 or less.
また、ポリオレフィン系樹脂中に餡殻の粒子を添加する方法も、特に限定されず、溶融させたポリオレフィン系樹脂中に餡殻の粒子を添加する方法や、ポリオレフィン系樹脂の原料モノマー中に餡殻の粒子を添加した後に当該原料モノマーを重合する方法等を好適に用いることができる。なお、溶融させたポリオレフィン系樹脂中に餡殻の粒子を添加する方法を用いると、ポリオレフィン系樹脂中での餡殻の粒子の分散性が良好なものとなり、成形時に物性のバラツキが少ない樹脂組成物が得られやすいので好ましい。 Further, the method of adding the particles of the shell to the polyolefin resin is not particularly limited, and the method of adding the particles of the shell to the melted polyolefin resin or the shell to the raw material monomer of the polyolefin resin is not particularly limited. A method of polymerizing the raw material monomer after adding the particles of the above can be preferably used. When the method of adding the particles of the shells to the melted polyolefin resin is used, the dispersibility of the particles of the shells in the polyolefin resin becomes good, and the resin composition has less variation in physical properties during molding. It is preferable because it is easy to obtain a product.
加えて、本発明に係る樹脂組成物によってフィルム・シートを成形する場合には、そのフィルム・シート上に、基材層、接着層、シーラント層、印刷層、バリア層（酸素バリア層、水蒸気バリア層等）、接着層、アンカーコート層等を形成可能な別のフィルムやシートを積層することによって、積層フィルムや積層シートとすることも可能である。 In addition, when a film sheet is molded from the resin composition according to the present invention, a base material layer, an adhesive layer, a sealant layer, a printing layer, and a barrier layer (oxygen barrier layer, steam barrier) are formed on the film sheet. It is also possible to obtain a laminated film or a laminated sheet by laminating another film or sheet capable of forming a layer or the like), an adhesive layer, an anchor coat layer or the like.
以下、本発明に係る樹脂組成物、当該樹脂組成物の製造方法、および樹脂成形品について実施例によって詳細に説明するが、本発明は、かかる実施例の態様に何ら限定されるものではなく、本発明の趣旨を逸脱しない範囲で、適宜変更することが可能である。また、実施例・比較例における物性、特性の評価方法は以下の通りである。 Hereinafter, the resin composition according to the present invention, the method for producing the resin composition, and the resin molded product will be described in detail by way of examples, but the present invention is not limited to the aspects of such examples. It is possible to make appropriate changes without departing from the spirit of the present invention. The methods for evaluating physical properties and characteristics in Examples and Comparative Examples are as follows.
＜メルトフローレート（ＭＦＲ）＞
東洋精機製作所製メルトインデックサ Ｆ−Ｆ０１を用いて、ＪＩＳ Ｋ６９２１−１に準拠した方法により、温度：１９０℃、荷重：２．１６ｋｇ、単位：ｇ／１０ｍｉｎの条件下で測定した。
<Melt flow rate (MFR)>
The measurement was carried out using a melt indexer F-F01 manufactured by Toyo Seiki Seisakusho under the conditions of temperature: 190 ° C., load: 2.16 kg, and unit: g / 10 min by a method according to JIS K6921-1.
＜環境への負荷＞
実施例・比較例で得られた樹脂組成物中に含まれるカーボンニュートラルな性質（燃やしても大気中のＣＯ２の増減に影響を与えない性質）を有する原料の量によって下記の２段階で評価した。
○：カーボンニュートラルな性質を有する原料の含有量が１０質量％以上である
×：カーボンニュートラルな性質を有する原料の含有量が１０質量％未満である
<Environmental load>
Evaluated in the following two stages according to the amount of carbon-neutral property (property that does not affect the increase or decrease of CO 2 in the atmosphere even when burned) contained in the resin composition obtained in Examples and Comparative Examples. did.
◯: The content of the raw material having carbon-neutral properties is 10% by mass or more ×: The content of the raw material having carbon-neutral properties is less than 10% by mass.
＜見た目の意匠性（風合い）＞
実施例・比較例で得られた樹脂成形品（合成樹脂フィルム・スプーン）の意匠性を、目視によって下記の３段階で官能評価した。
◎：通常の樹脂成形品とは異なる独特な風合いや質感（植物由来の素材から醸し出されるもの等）があるとともに、表面が艶消しされており、ほとんどてからない
○：若干の風合いや質感があるとともに、表面がわずかに艶消しされており、あまりてからない
△：独特な風合いや質感がない上、表面がほとんど艶消しされておらず、表面のてかり度合いが高い
<Appearance design (texture)>
The design properties of the resin molded products (synthetic resin film / spoon) obtained in Examples and Comparative Examples were visually evaluated in the following three stages.
◎: It has a unique texture and texture (such as those produced from plant-derived materials) that are different from ordinary resin molded products, and the surface is matte, so it is almost unheard of. ○: Some texture and texture At the same time, the surface is slightly matte, which is not so much. △: There is no unique texture or texture, and the surface is almost not matte, so the degree of surface shine is high.
＜表面の触感＞
実施例・比較例で得られた樹脂成形品（合成樹脂フィルム・スプーン）の表面の触感を、下記の３段階で官能評価した。
◎：餡殻独特のざらついた触感を強く感じる（適度な凹凸感があり滑らかさを感じる）
○：餡殻独特のざらついた触感を感じる
△：樹脂の触感以外の触感を感じない（滑らかでなく指先が引っ掛かる感じがする）
<Tactile feel of the surface>
The tactile sensation of the surface of the resin molded product (synthetic resin film / spoon) obtained in Examples and Comparative Examples was sensory evaluated in the following three stages.
◎: Strongly feels the rough texture peculiar to bean paste (feels smooth with moderate unevenness)
○: Feel the rough texture peculiar to the bean paste △: Do not feel the touch other than the resin (it is not smooth and the fingertips are caught)
＜引張強さ＞
実施例１〜４・比較例２で製造された合成樹脂フィルムを、長さ１５０ｍｍ、幅１５ｍｍにサンプリングし、温度２３℃、相対湿度５０％の雰囲気下で２４時間調湿した。しかる後、温度２３℃、相対湿度５０％の条件下で、ＪＩＳ Ｋ−７１２７に準拠し、島津株式会社製オートグラフＡＧ−１００Ｅ型を使用し、調湿した合成樹脂フィルムを１００ｍｍの距離を隔てたチャック間に掴み、引張速度２００ｍｍ／分で引っ張り、引張比例限度内における引張応力とこれに対応するひずみの比を、引張弾性率として算出した。そして、算出された引張弾性率の数値によって、下記の３段階で評価した。
◎：２．０ＧＰａ以上
○：１．０ＧＰａ以上２．０ＧＰａ未満
△：１．０ＧＰａ未満
<Tensile strength>
The synthetic resin films produced in Examples 1 to 4 and Comparative Example 2 were sampled to a length of 150 mm and a width of 15 mm, and were humidity-controlled for 24 hours in an atmosphere of a temperature of 23 ° C. and a relative humidity of 50%. After that, under the conditions of a temperature of 23 ° C. and a relative humidity of 50%, an autograph AG-100E type manufactured by Shimadzu Corporation was used in accordance with JIS K-7127, and the humidity-controlled synthetic resin film was separated by a distance of 100 mm. It was gripped between the chucks and pulled at a tensile speed of 200 mm / min, and the ratio of the tensile stress within the tensile proportional limit to the corresponding strain was calculated as the tensile elastic modulus. Then, it was evaluated in the following three stages based on the calculated tensile elastic modulus.
⊚: 2.0 GPa or more ○: 1.0 GPa or more and less than 2.0 GPa Δ: less than 1.0 GPa
［実施例１］
＜餡殻粒子の作製＞
餡殻（小豆から餡子を製造する際に取り除かれる煮沸後の小豆の皮）を絞り水分を除去したのち、８０℃で３時間に亘って乾燥させた。しかる後、その乾燥後の餡殻を、分級粉砕機によって平均粒子径（数平均粒子径）が３ｍｍ程度になるように粗く粉砕した。さらに、上記の如く粉砕した餡殻の粒子を、１００℃で３時間に亘って乾燥させた後、分級粉砕機によって平均粒子径（数平均粒子径）が１０μｍとなるように再度粉砕・分級することによって、餡殻粒子（平均粒径＝１０μｍ）を得た。
[Example 1]
<Preparation of bean paste particles>
The bean paste (the skin of azuki beans after boiling, which is removed when the bean paste is produced from azuki beans) was squeezed to remove water, and then dried at 80 ° C. for 3 hours. After that, the dried bean paste was roughly crushed by a classification crusher so that the average particle size (number average particle size) was about 3 mm. Further, the particles of the husks crushed as described above are dried at 100 ° C. for 3 hours, and then crushed and classified again by a classification crusher so that the average particle size (number average particle size) is 10 μm. As a result, shell particles (average particle size = 10 μm) were obtained.
＜樹脂組成物の作製＞
変性ポリオレフィン樹脂であるマレイン酸変性ポリプロピレンを約２００℃で溶融させて、その溶融樹脂中に、上記した餡殻の粒子（数平均粒子径＝１０μｍ）を、６０質量％添加することによって樹脂組成物を調製した。そして、得られた樹脂組成物のメルトフローレート（ＭＦＲ）を上記した方法によって測定した。
<Preparation of resin composition>
A resin composition is obtained by melting maleic acid-modified polypropylene, which is a modified polyolefin resin, at about 200 ° C., and adding 60% by mass of the above-mentioned particles of shells (number average particle diameter = 10 μm) to the molten resin. Was prepared. Then, the melt flow rate (MFR) of the obtained resin composition was measured by the above-mentioned method.
＜樹脂成形品の製造＞
上記の如く樹脂組成物を、２００℃の温度条件でシート状に押し出し、所定の温度で二軸延伸することによって、厚さ１００μｍの合成樹脂フィルムを得た。そして、その合成樹脂フィルムの特性を、上記した方法によって評価した。実施例１の合成樹脂フィルムの特性の評価結果を、樹脂組成物の性状とともに表１に示す。
<Manufacturing of resin molded products>
As described above, the resin composition was extruded into a sheet under a temperature condition of 200 ° C. and biaxially stretched at a predetermined temperature to obtain a synthetic resin film having a thickness of 100 μm. Then, the characteristics of the synthetic resin film were evaluated by the above-mentioned method. The evaluation results of the characteristics of the synthetic resin film of Example 1 are shown in Table 1 together with the properties of the resin composition.
［実施例２］
ポリエチレン樹脂と変性ポリオレフィン樹脂であるマレイン酸変性ポリプロピレンの１：１の混合物を約２００℃で溶融させて、その溶融樹脂中に、実施例１と同様にして得られた餡殻の粒子（数平均粒子径＝１０μｍ）を、１０質量％添加することによって実施例２の樹脂組成物を調製した。そして、得られた樹脂組成物のメルトフローレートを上記した方法によって測定した。また、得られた実施例２の樹脂組成物を用いて、実施例１と同様な方法によって、厚さ１００μｍの合成樹脂フィルムを得た。そして、その合成樹脂フィルムの特性を、上記した方法によって評価した。実施例２の合成樹脂フィルムの特性の評価結果を、樹脂組成物の性状とともに表１に示す。
[Example 2]
A 1: 1 mixture of a polyethylene resin and a maleic acid-modified polypropylene, which is a modified polyolefin resin, is melted at about 200 ° C., and in the molten resin, particles of shells obtained in the same manner as in Example 1 (number average). The resin composition of Example 2 was prepared by adding 10% by mass (particle size = 10 μm). Then, the melt flow rate of the obtained resin composition was measured by the above method. Further, using the obtained resin composition of Example 2, a synthetic resin film having a thickness of 100 μm was obtained by the same method as in Example 1. Then, the characteristics of the synthetic resin film were evaluated by the above-mentioned method. The evaluation results of the characteristics of the synthetic resin film of Example 2 are shown in Table 1 together with the properties of the resin composition.
［実施例３］
餡殻粒子の作製において、餡殻粒子の平均粒子径（数平均粒子径）が１００μｍとなるように調整したこと以外は実施例１と同様にして、餡殻粒子を得た。そして、その餡殻粒子（数平均粒子径＝１００μｍ）を、約２００℃で溶融させた実施例１と同じ変性ポリオレフィン樹脂（マレイン酸変性ポリプロピレン）中に、５０質量％添加することによって実施例３の樹脂組成物を調製し、得られた樹脂組成物のメルトフローレートを上記した方法によって測定した。また、得られた実施例３の樹脂組成物を用いて、実施例１と同様な方法によって、厚さ１００μｍの合成樹脂フィルムを得た。そして、その合成樹脂フィルムの特性を、上記した方法によって評価した。実施例３の合成樹脂フィルムの特性の評価結果を、樹脂組成物の性状とともに表１に示す。
[Example 3]
In the preparation of the bean paste particles, the bean paste particles were obtained in the same manner as in Example 1 except that the average particle size (number average particle size) of the bean paste particles was adjusted to 100 μm. Then, by adding 50% by mass of the shell particles (number average particle diameter = 100 μm) to the same modified polyolefin resin (maleic acid-modified polypropylene) as in Example 1 melted at about 200 ° C., Example 3 The resin composition of the above was prepared, and the melt flow rate of the obtained resin composition was measured by the above-mentioned method. Further, using the obtained resin composition of Example 3, a synthetic resin film having a thickness of 100 μm was obtained by the same method as in Example 1. Then, the characteristics of the synthetic resin film were evaluated by the above-mentioned method. The evaluation results of the characteristics of the synthetic resin film of Example 3 are shown in Table 1 together with the properties of the resin composition.
［実施例４］
餡殻粒子の作製時に実施例１と同様に粗く粉砕した後に、餡殻の粒子を２５℃の温度下で１規定の酢酸に浸漬させることによって、当該餡殻の粒子の表面をアセチル化し、アセチル化した餡殻の粒子を、１００℃で３時間に亘って乾燥させた後、分級粉砕機によって平均粒子径（数平均粒子径）が１０μｍとなるように再度粉砕・分級することによって、餡殻粒子を得た。そして、その餡殻粒子（数平均粒子径＝１０μｍ）を、約２００℃で溶融させたポリオレフィン樹脂（ポリプロピレン）中に、５０質量％添加することによって実施例４の樹脂組成物を調製し、得られた樹脂組成物のメルトフローレートを上記した方法によって測定した。また、得られた実施例４の樹脂組成物を用いて、実施例１と同様な方法によって、厚さ１００μｍの合成樹脂フィルムを得た。そして、その合成樹脂フィルムの特性を、上記した方法によって評価した。実施例４の合成樹脂フィルムの特性の評価結果を、樹脂組成物の性状とともに表１に示す。
[Example 4]
When the bean paste particles are prepared, they are roughly crushed in the same manner as in Example 1, and then the bean paste particles are immersed in acetic acid specified in 1 at a temperature of 25 ° C. to acetylate the surface of the bean paste particles and acetylate them. The acetylated bean paste particles are dried at 100 ° C. for 3 hours, and then crushed and classified again with a classification crusher so that the average particle size (number average particle size) is 10 μm. Obtained particles. Then, the resin composition of Example 4 was prepared by adding 50% by mass of the shell particles (number average particle diameter = 10 μm) to a polyolefin resin (polypropylene) melted at about 200 ° C. The melt flow rate of the obtained resin composition was measured by the above method. Further, using the obtained resin composition of Example 4, a synthetic resin film having a thickness of 100 μm was obtained by the same method as in Example 1. Then, the characteristics of the synthetic resin film were evaluated by the above-mentioned method. The evaluation results of the characteristics of the synthetic resin film of Example 4 are shown in Table 1 together with the properties of the resin composition.
［実施例５］
実施例３と同様にして得られた餡殻粒子（数平均粒子径＝１００μｍ）を、約２００℃で溶融させた実施例１と同じ変性ポリオレフィン樹脂（マレイン酸変性ポリプロピレン）中に、２０質量％添加することによって実施例５の樹脂組成物を調製し、得られた樹脂組成物のメルトフローレートを上記した方法によって測定した。また、得られた実施例５の樹脂組成物を用いて、２００℃の温度条件で射出成形することによって、樹脂成形品であるスプーン（把持部の長さ×最大幅×厚みが１８０ｍｍ×１０ｍｍ×２．０ｍｍで、収納部の容量が１０ｃｃのもの）を形成した。そして、そのスプーンの特性を、上記した方法によって評価した。実施例５のスプーンの特性の評価結果を、樹脂組成物の性状とともに表１に示す。
[Example 5]
The shell particles (number average particle diameter = 100 μm) obtained in the same manner as in Example 3 were melted at about 200 ° C. in the same modified polyolefin resin (maleic acid-modified polypropylene) as in Example 1 in an amount of 20% by mass. The resin composition of Example 5 was prepared by addition, and the melt flow rate of the obtained resin composition was measured by the above method. Further, by injection molding the obtained resin composition of Example 5 under a temperature condition of 200 ° C., a spoon (length of grip portion × maximum width × thickness 180 mm × 10 mm ×) which is a resin molded product It was 2.0 mm and had a storage capacity of 10 cc). Then, the characteristics of the spoon were evaluated by the above-mentioned method. The evaluation results of the characteristics of the spoon of Example 5 are shown in Table 1 together with the properties of the resin composition.
［実施例６］
餡殻粒子の作製において、平均粒子径（数平均粒子径）が３ｍｍ（＝３，０００μｍ）となるように調整したこと以外は実施例１と同様にして、餡殻粒子を得た。そして、その餡殻粒子（数平均粒子径＝３，０００μｍ）を、約２００℃で溶融させた実施例１と同じ変性ポリオレフィン樹脂（マレイン酸変性ポリプロピレン）中に、２０質量％添加することによって実施例６の樹脂組成物を調製し、得られた樹脂組成物のメルトフローレートを上記した方法によって測定した。また、得られた実施例６の樹脂組成物を用いて、実施例５と同様な方法によってスプーンを形成した。そして、そのスプーンの特性を、上記した方法によって評価した。実施例６のスプーンの特性の評価結果を、樹脂組成物の性状とともに表１に示す。
[Example 6]
In the preparation of the bean paste particles, the bean paste particles were obtained in the same manner as in Example 1 except that the average particle diameter (number average particle diameter) was adjusted to 3 mm (= 3,000 μm). Then, 20% by mass of the shell particles (number average particle diameter = 3,000 μm) was added to the same modified polyolefin resin (maleic acid-modified polypropylene) as in Example 1 melted at about 200 ° C. The resin composition of Example 6 was prepared, and the melt flow rate of the obtained resin composition was measured by the above method. Further, using the obtained resin composition of Example 6, a spoon was formed by the same method as in Example 5. Then, the characteristics of the spoon were evaluated by the above-mentioned method. The evaluation results of the characteristics of the spoon of Example 6 are shown in Table 1 together with the properties of the resin composition.
［比較例１］
変性ポリオレフィン樹脂（マレイン酸変性ポリプロピレン）中への餡殻粒子の添加量を８０質量％に変更したこと以外は実施例１と同様にして、比較例１の樹脂組成物を調製し、得られた樹脂組成物のメルトフローレートを上記した方法によって測定した。また、得られた比較例１の樹脂組成物を用いて、実施例１と同様な方法によって厚さ１００μｍの合成樹脂フィルムの成膜を試みたが、破断が頻発して合成樹脂フィルムを得ることができなかった。
[Comparative Example 1]
The resin composition of Comparative Example 1 was prepared and obtained in the same manner as in Example 1 except that the amount of the shell particles added to the modified polyolefin resin (maleic acid-modified polypropylene) was changed to 80% by mass. The melt flow rate of the resin composition was measured by the method described above. Further, using the obtained resin composition of Comparative Example 1, an attempt was made to form a synthetic resin film having a thickness of 100 μm by the same method as in Example 1, but breakage occurred frequently to obtain a synthetic resin film. I couldn't.
［比較例２］
実施例１と同じ変性ポリオレフィン樹脂（マレイン酸変性ポリプロピレン メルトフローレート＝２０）を、２００℃の温度条件でシート状に押し出し、所定の温度で二軸延伸することによって、厚さ１００μｍの合成樹脂フィルムを得た。そして、その合成樹脂フィルムの特性を、上記した方法によって評価した。比較例２の合成樹脂フィルムの特性の評価結果を、樹脂組成物の性状とともに表１に示す。
[Comparative Example 2]
A synthetic resin film having a thickness of 100 μm is formed by extruding the same modified polyolefin resin (maleic acid-modified polypropylene melt flow rate = 20) as in Example 1 into a sheet under a temperature condition of 200 ° C. and biaxially stretching it at a predetermined temperature. Got Then, the characteristics of the synthetic resin film were evaluated by the above-mentioned method. The evaluation results of the characteristics of the synthetic resin film of Comparative Example 2 are shown in Table 1 together with the properties of the resin composition.
［比較例３］
実施例３と同様にして得られた餡殻粒子（数平均粒子径＝１００μｍ）を、約２００℃で溶融させた実施例１と同じ変性ポリオレフィン樹脂（マレイン酸変性ポリプロピレン）中に、７５質量％添加することによって比較例３の樹脂組成物を調製し、得られた樹脂組成物のメルトフローレートを上記した方法によって測定した。また、得られた比較例３の樹脂組成物を用いて、２００℃の温度条件で射出成形することによって、実施例５と同じ形状のスプーンの形成を試みたが、樹脂組成物の脆弱性が高く、使用に耐え得るスプーンを形成することができなかった。
[Comparative Example 3]
The shell particles (number average particle diameter = 100 μm) obtained in the same manner as in Example 3 were melted at about 200 ° C. in the same modified polyolefin resin (maleic acid-modified polypropylene) as in Example 1 in an amount of 75% by mass. The resin composition of Comparative Example 3 was prepared by addition, and the melt flow rate of the obtained resin composition was measured by the above method. Further, using the obtained resin composition of Comparative Example 3, an attempt was made to form a spoon having the same shape as that of Example 5 by injection molding under a temperature condition of 200 ° C., but the resin composition was fragile. It was not possible to form a spoon that was expensive and could withstand use.
［比較例４］
実施例１と同じ変性ポリオレフィン樹脂（マレイン酸変性ポリプロピレン メルトフローレート＝２０）を用いて、実施例５と同様な方法によってスプーンを形成した。そして、そのスプーンの特性を、上記した方法によって評価した。比較例４のスプーンの特性の評価結果を、樹脂組成物の性状とともに表１に示す。
[Comparative Example 4]
Using the same modified polyolefin resin as in Example 1 (maleic acid-modified polypropylene melt flow rate = 20), spoons were formed in the same manner as in Example 5. Then, the characteristics of the spoon were evaluated by the above-mentioned method. The evaluation results of the characteristics of the spoon of Comparative Example 4 are shown in Table 1 together with the properties of the resin composition.
表１から、実施例１〜６の樹脂組成物は、いずれも、成形品を廃棄する際の環境負荷が小さいばかりでなく、成形性が良好であることが分かる。また、実施例１〜４の樹脂組成物によって成形されたフィルムは、餡殻独特の風合い・質感、触感を有しており、意匠性に優れているとともに、ポリオレフィン系樹脂本来の特性が損なわれておらず、ポリオレフィン系樹脂と同程度の引張強度を有していることが分かる。一方、実施例５，６の樹脂組成物によって成形されたスプーンは、餡殻独特の風合い・質感、触感を有しており、意匠性に優れていることが分かる。 From Table 1, it can be seen that the resin compositions of Examples 1 to 6 not only have a small environmental load when the molded product is discarded, but also have good moldability. Further, the films formed by the resin compositions of Examples 1 to 4 have a texture, texture, and tactile sensation peculiar to the shell, are excellent in design, and impair the original characteristics of the polyolefin resin. It can be seen that it has the same tensile strength as the polyolefin-based resin. On the other hand, the spoons formed by the resin compositions of Examples 5 and 6 have a texture, texture, and tactile sensation peculiar to bean paste, and it can be seen that they are excellent in design.
それに対して、比較例１，３の樹脂組成物は、成形品を廃棄する際の環境負荷が小さいものの、成形性が不良であり、比較例２，４の樹脂組成物は、成形品を廃棄する際の環境負荷が大きい上、意匠性に乏しいことが分かる。 On the other hand, the resin compositions of Comparative Examples 1 and 3 have a small environmental load when the molded product is discarded, but the moldability is poor, and the resin compositions of Comparative Examples 2 and 4 discard the molded product. It can be seen that the environmental load is large and the design is poor.
本発明に係る樹脂組成物は、上記の如く優れた効果を奏するものであるから、各種の樹脂成形品を成形するための原料として好適に用いることができる。また、当該樹脂組成物によって形成される樹脂成形品は、生活用品、台所用品、事務用品、インテリア用品、土木建築用資材等の各用途に好適に用いることができる。 Since the resin composition according to the present invention exhibits excellent effects as described above, it can be suitably used as a raw material for molding various resin molded products. Further, the resin molded product formed by the resin composition can be suitably used for various uses such as daily necessities, kitchen supplies, office supplies, interior supplies, civil engineering and construction materials, and the like.
Claims (11)
前記合成樹脂がポリオレフィン系樹脂であり、前記植物由来材が餡殻であるとともに、
下記の式１に示す餡殻の粒子とポリオレフィン系樹脂との混合割合が、１％以上７０％以下であることを特徴とする樹脂組成物。
（餡殻の粒子とポリオレフィン系樹脂との混合割合）＝（餡殻の粒子の質量）／[（餡殻の粒子の質量）＋（ポリオレフィン系樹脂の質量）］ ・・式１ A resin composition obtained by mixing synthetic resin and particles of plant-derived material.
The synthetic resin is a polyolefin resin, the plant-derived material is a bean paste, and
A resin composition characterized in that the mixing ratio of the bean paste particles represented by the following formula 1 and the polyolefin-based resin is 1% or more and 70% or less.
(Mixing ratio of husk particles and polyolefin resin) = (mass of husk particles) / [(mass of husk particles) + (mass of polyolefin resin)] ・ ・ Equation 1
餡殻の粒子を乾燥させる乾燥工程と、
その乾燥工程によって乾燥させた餡殻の粒子を、溶融させたポリオレフィン系樹脂中に添加して混練する混練工程とを有することを特徴とする樹脂組成物の製造方法。 The method for producing a resin composition according to any one of claims 1 to 7.
The drying process to dry the particles of the bean paste and
A method for producing a resin composition, which comprises a kneading step in which particles of bean paste dried by the drying step are added to a melted polyolefin resin and kneaded.
餡殻の粒子をアセチル化する表面処理工程と、
その表面処理工程によってアセチル化した餡殻を、溶融させたポリオレフィン系樹脂中に添加して混練する混練工程とを有することを特徴とする樹脂組成物の製造方法。 The method for producing a resin composition according to claim 7.
A surface treatment process that acetylates the particles of the bean paste,
A method for producing a resin composition, which comprises a kneading step of adding and kneading bean paste acetylated by the surface treatment step into a melted polyolefin resin.
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