JP2007313693A - Resin composition for washing plastic molding machine - Google Patents
Resin composition for washing plastic molding machine Download PDFInfo
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Abstract
Description
本発明は、プラスチック用成形機（押出、射出、インフレーション（ブローともいう）など）の作業終了時や品種切り替え時に、成形機内に残留する熱可塑性樹脂組成物を、効率よく、しかも安全に除去するための洗浄用樹脂組成物に関する。 The present invention efficiently and safely removes a thermoplastic resin composition remaining in a molding machine when a plastic molding machine (extrusion, injection, inflation (also referred to as blow)) is completed or when a product is switched. The present invention relates to a cleaning resin composition.
熱可塑性樹脂の成型加工において、作業終了時や品種切り替え時に、先行樹脂の影響を排除するために、成形機内を洗浄する必要がある。そのためには、次に使用する樹脂で洗浄すれば良いが、これには多量の樹脂が必要であり、かつ複雑な構造をする金型内など成形機内の汚れを完全に取り除くことができない。この結果、後続する樹脂中に先行樹脂が混入し、後続する品種の汚染により得られる成形品の外観や物性に悪影響が発生する。 In the molding process of a thermoplastic resin, it is necessary to clean the inside of the molding machine in order to eliminate the influence of the preceding resin at the end of the work or when switching the product type. For this purpose, it is sufficient to wash with a resin to be used next, but this requires a large amount of resin, and it is impossible to completely remove dirt in the molding machine such as a mold having a complicated structure. As a result, the preceding resin is mixed into the subsequent resin, and the appearance and physical properties of the molded product obtained by contamination of the subsequent product are adversely affected.
これを解消するために、洗浄用樹脂組成物が提案されている。
例えば、特許文献１には、熱可塑性樹脂に、平均粒径１〜３０μの無機多孔性物質および滑剤を配合してなるプラスチック成形機用樹脂組成物が提案されている。特許文献１では、洗浄用樹脂組成物として、高級脂肪酸などの滑剤のみの配合では、多量に使用しても洗浄効果が不十分であり、炭酸カルシウム、珪酸カルシウム、珪砂、ガラス繊維など硬度の大きな無機物質を多量に配合したものだけでも、成形機の完全な洗浄には多量必要であるとしていて、両者を配合する提案がなされている。また、特許文献１では、好適な無機多孔性物質として珪藻土を挙げている。
In order to solve this problem, a cleaning resin composition has been proposed.
For example, Patent Document 1 proposes a resin composition for a plastic molding machine in which an inorganic porous material having an average particle diameter of 1 to 30 μm and a lubricant are blended with a thermoplastic resin. In Patent Document 1, when only a lubricant such as a higher fatty acid is used as a cleaning resin composition, the cleaning effect is insufficient even when used in a large amount, and the hardness of calcium carbonate, calcium silicate, silica sand, glass fiber, etc. is large. Even if only a large amount of inorganic substance is blended, a large amount is necessary for complete cleaning of the molding machine, and proposals have been made to blend both. Moreover, in patent document 1, diatomaceous earth is mentioned as a suitable inorganic porous substance.
また、特許文献２には、熱可塑性樹脂に対して、スルホン酸系界面活性剤、無機塩または金属水酸化物、および無機充填剤からなる洗浄用熱可塑性樹脂組成物が提案され、無機充填剤の具体例として炭酸カルシウム、シリカ、タルク、ケイソウ土などが挙げられている。 Patent Document 2 proposes a cleaning thermoplastic resin composition comprising a sulfonic acid-based surfactant, an inorganic salt or metal hydroxide, and an inorganic filler with respect to the thermoplastic resin. Specific examples thereof include calcium carbonate, silica, talc, diatomaceous earth and the like.
さらに、特許文献３には、高密度ポリエチレン、ポリエチレンワックス、アルキルベンゼンスルホン酸の中性塩および無機充填剤からなる洗浄用樹脂組成物が提案され、無機充填剤の具体例として、炭酸マグネシウム、炭酸カルシウム、シリカなどが挙げられている。
無機充填剤としての珪藻土は、結晶性シリカを１０％程度含有すると言われているが、この結晶性シリカは、ＩＡＲＣ（Ｉｎｔｅｒｎａｔｉｏｎａｌ Ａｇｅｎｃｙ ｆｏｒ Ｒｅｓｅａｒｃｈ ｏｎ Ｃａｎｃｅｒの略称）によって、１９８７年に、発ガン性リスクがグループ２Ａと認定された。一方ＯＳＨＡ（Ｏｃｃｕｐａｔｉｏｎａｌ Ｓａｆｅｔｙ ａｎｄ Ｈｅａｌｔｈ Ａｄｍｉｎｉｓｔｒａｔｉｏｎの略称）は、１９９２年には、結晶性シリカを０．１％以上含有するものは、結晶性シリカと同等とすることを製造業者にもとめた。さらに、１９９７年にＩＡＲＣは、結晶性シリカの発ガン性リスクがさらにリスクの高いグループ１の指定とした。これにより、珪藻土、特に融剤焼成珪藻土の発ガン性の懸念が明らかとなった。 Diatomaceous earth as an inorganic filler is said to contain about 10% of crystalline silica, but this crystalline silica was developed in 1987 by IARC (abbreviation of International Agency for Research on Cancer). Has been certified as Group 2A. On the other hand, in 1992, OSHA (abbreviation of Occupational Safety and Health Administration) also insists that the one containing 0.1% or more of crystalline silica is equivalent to crystalline silica. Furthermore, in 1997, IARC designated Group 1 with higher risk of carcinogenicity of crystalline silica. As a result, concerns about the carcinogenicity of diatomaceous earth, particularly flux-calcined diatomaceous earth, became clear.
一方、これらの洗浄用樹脂組成物は、ペレット化されて好都合に使用されるが、滑剤や界面活性剤（本願明細書では、両者を総称して、滑剤と呼ぶ）は、スリップ（滑らせる）作用を持つものであり、洗浄のためには必須の成分であるが、ペレット化のために、均質な樹脂組成物を得るために溶融混練して調製する際、滑剤が、樹脂１００質量部に対して８質量部程度も配合されると、溶融混練機中で、溶融下、樹脂と滑剤の両者が、滑りあい、混練羽根に対しても、滑り、結果として空滑りして混合されず、均質化が困難になり、これをペレット化しても、高い品質の洗浄用樹脂組成物のペレットの製造は難しいことであった。 On the other hand, these cleaning resin compositions are conveniently used after being pelletized, but lubricants and surfactants (in the present specification, both are collectively referred to as lubricants) slip (slide). It has an action and is an essential component for washing, but when pelletized, it is melt kneaded to obtain a homogeneous resin composition, and the lubricant is added to 100 parts by mass of the resin. On the other hand, when about 8 parts by mass is blended, in the melt kneader, both the resin and the lubricant slide while being melted. It became difficult to homogenize, and even if this was pelletized, it was difficult to produce pellets of a high-quality cleaning resin composition.
従って、優れた洗浄作用と自己排出性をもつ、より安全で、容易に溶融混練でき、ペレット化が容易になされる製造の容易な洗浄用樹脂組成物の開発が求められていた。 Accordingly, there has been a demand for the development of a safer, easily melt-kneaded, easy-to-manufacture and easy-to-manufacture resin composition that has excellent cleaning action and self-discharge properties.
本発明の目的は、優れた洗浄力（機内洗浄性）および自己排出性を兼ね備え、より安全性で、容易に溶融混練でき、均質なペレット化も容易なプラスチック成形機の洗浄用樹脂組成物を提供することにある。 An object of the present invention is to provide a resin composition for cleaning a plastic molding machine that has excellent cleaning power (in-machine cleaning properties) and self-discharge properties, is safer, can be easily melt-kneaded, and can be easily formed into uniform pellets. It is to provide.
本発明者らは、それ自体例えば肺の中に吸入されても、代謝により分解することが知られていて、安全性が高いことが確認されている炭酸カルシウムに注目し、上記の目的を達成するために鋭意研究行った結果、無機充填剤として、煮あまに油吸油量が特定の範囲にある炭酸カルシウムを、滑剤とともに特定の割合で配合することにより、溶融混練性・洗浄性・自己排出性のすべてを満足する洗浄用樹脂組成物が得られることを見出し、かかる知見に基いて、本発明を完成させた。 The inventors of the present invention focused on calcium carbonate, which is known to be decomposed by metabolism even when inhaled into the lung, for example, and has been confirmed to be highly safe. As a result of diligent research, the blending of calcium carbonate with a certain amount of oil absorption in a specific range as a mineral filler in a specific ratio with a lubricant makes it possible to melt-knead, clean and self-discharge. The present inventors have found that a cleaning resin composition satisfying all of the properties can be obtained, and have completed the present invention based on such knowledge.
すなわち、本発明の第１の発明によれば、メルトマスフローレート０．０１〜５ｇ／１０分（ＪＩＳ Ｋ−６９２２−２に準拠して１９０℃での測定値）の熱可塑性樹脂１００質量部、滑剤１〜２０質量部、および無機充填剤５〜３０質量部からなるプラスチック成形機洗浄用樹脂組成物であって、前記無機充填剤は、煮あまに油吸油量が１００〜１６０ｍｌ／１００ｇ（ＪＩＳ Ｋ−５１０１−１３−２に準拠しての測定値）の炭酸カルシウムであることを特徴とするプラスチック成形機洗浄用樹脂組成物が提供される。 That is, according to the first aspect of the present invention, 100 parts by mass of a thermoplastic resin having a melt mass flow rate of 0.01 to 5 g / 10 min (measured at 190 ° C. in accordance with JIS K-6922-2), A resin composition for washing a plastic molding machine comprising 1 to 20 parts by mass of a lubricant and 5 to 30 parts by mass of an inorganic filler, wherein the inorganic filler has an oil absorption of 100 to 160 ml / 100 g (JIS). A resin composition for cleaning a plastic molding machine is provided, which is calcium carbonate having a measured value according to K-5101-13-2.
また、本発明の第２の発明によれば、前記無機充填剤を構成する炭酸カルシウムの煮あまに油吸油量が、１３０〜１５０ｍｌ／１００ｇであることを特徴とする第１の発明に係るプラスチック成形機洗浄用樹脂組成物が提供される。 According to a second aspect of the present invention, the oil according to the first aspect is characterized in that the oil absorption is 130 to 150 ml / 100 g in the boiled calcium carbonate constituting the inorganic filler. A resin composition for washing a molding machine is provided.
また、本発明の第３の発明によれば、前記滑剤が、グリセリン脂肪酸エステルからなることを特徴とする第１発明または第２発明に係るプラスチック成形機洗浄用樹脂組成物が提供される。 According to a third aspect of the present invention, there is provided the plastic molding machine cleaning resin composition according to the first or second aspect, wherein the lubricant comprises a glycerin fatty acid ester.
また、本発明の第４の発明によれば、前記滑剤が、脂肪酸アミド及びグリセリン脂肪酸エステルの３：７〜７：３（質量比）の混合物からなることを特徴とする第１発明または第２発明に係るプラスチック成形機洗浄用樹脂組成物が提供される。 According to a fourth aspect of the present invention, the lubricant comprises a mixture of fatty acid amide and glycerin fatty acid ester in a ratio of 3: 7 to 7: 3 (mass ratio). A resin composition for cleaning a plastic molding machine according to the invention is provided.
さらに、本発明の第５の発明によれば、前記熱可塑性樹脂が、エチレン系樹脂であり、洗浄除去されるべき被洗浄樹脂組成物もエチレン系樹脂組成物であることを特徴とする、第１〜第４のいずれかの発明に係るプラスチック成形機洗浄用樹脂組成物が提供される。 Furthermore, according to a fifth aspect of the present invention, the thermoplastic resin is an ethylene resin, and the resin composition to be cleaned to be washed away is an ethylene resin composition. A resin composition for washing a plastic molding machine according to any one of the first to fourth inventions is provided.
上記のように、本発明は、熱可塑性樹脂１００質量部、滑剤１〜２０質量部、および無機充填剤５〜３０質量部からなるプラスチック成形機洗浄用樹脂組成物であって、前記無機充填剤は、煮あまに油吸油量が１００〜１６０ｍｌ／１００ｇ（ＪＩＳ Ｋ−５１０１−１３−２に準拠しての測定値）の炭酸カルシウム（以下、「特定の炭酸カルシウム」ともいう）であることを特徴とするプラスチック成形機洗浄用樹脂組成物であるので、滑剤の樹脂への浸透力による洗浄作用と、硬い無機充填剤によって機内に付着残留する樹脂を擦り落とす作用との相乗的な優れた洗浄効果を奏し、後述する自己排出性も優れていて、しかも、特定の炭酸カルシウムによる滑剤の吸着によるものと考えられる効果により、従来困難であった樹脂と滑剤の溶融混練を容易に行うことができ、均質な溶融混練物が得られるので、これをペレット化して均質な高品質のプラスチック成形機洗浄用樹脂組成物を容易に調製、製造することができる。 As described above, the present invention is a resin composition for washing a plastic molding machine comprising 100 parts by weight of a thermoplastic resin, 1 to 20 parts by weight of a lubricant, and 5 to 30 parts by weight of an inorganic filler. Is that the amount of oil absorption in boiled sea urchin is 100 to 160 ml / 100 g (measured value according to JIS K-5101-13-2) (hereinafter also referred to as “specific calcium carbonate”). Since it is a resin composition for cleaning plastic molding machines, it has a synergistic and excellent cleaning effect of the cleaning action by the penetration force of the lubricant into the resin and the action of scraping off the resin adhering and remaining in the machine by the hard inorganic filler. It is effective and has excellent self-discharge properties, which will be described later. Moreover, due to the effect considered to be due to the adsorption of the lubricant by specific calcium carbonate, it was difficult to dissolve the resin and the lubricant. Can be performed kneading easily, since homogeneous melt-kneaded product is obtained, which readily prepare homogenous high quality plastic molding machine cleaning resin composition was pelletized, it can be produced.
本発明の効果である自己排出性とは、成形機内に滞留することなく、スクリュー回転によってたやすく排出される性能をいう。自己排出性は、スクリュー等の金属表面から容易に剥離できることにより達成される性能であり、自己排出性に優れた本発明の成形機洗浄用樹脂組成物は、洗浄操作後に使用する樹脂による成形品に混入されることはない（当該樹脂に容易に置換される）。 The self-discharge property, which is an effect of the present invention, refers to the performance of being easily discharged by screw rotation without staying in the molding machine. The self-discharge property is a performance achieved by being easily peelable from a metal surface such as a screw. The resin composition for cleaning a molding machine of the present invention, which is excellent in self-discharge property, is a molded product made of a resin used after a cleaning operation. (They are easily replaced by the resin).
滑剤は、自己排出性の作用があるが、従来の洗浄用樹脂組成物に使用される無機充填物の中には、滑剤の界面活性力を阻害し、洗浄用樹脂組成物を成形機内に付着、滞留させるものがある。これは、そのような無機充填剤が、おそらく熱可塑性樹脂との摩擦によって帯電しやすい物質である場合に起こりえると考えられ、具体的には、熱可塑性樹脂とは帯電序列が遠いガラス質、例えばシリカ類がこれに相当すると考えられる。本発明で使用した特定の炭酸カルシウムは、熱可塑性樹脂との摩擦では比較的帯電しにくく、滑剤の界面活性力を阻害することが無いと考えている。 Although the lubricant has a self-discharging action, some inorganic fillers used in conventional cleaning resin compositions inhibit the surface active force of the lubricant and adhere the cleaning resin composition to the molding machine. , There is something to stay. This is thought to occur when such an inorganic filler is a substance that is likely to be charged by friction with a thermoplastic resin, specifically, a vitreous material whose charging order is far from that of a thermoplastic resin, For example, silicas are considered to correspond to this. It is considered that the specific calcium carbonate used in the present invention is relatively less charged by friction with a thermoplastic resin and does not hinder the surface activity of the lubricant.
以下、本発明のプラスチック成形機洗浄用樹脂組成物について、各構成成分毎に詳細に説明する。 Hereinafter, the resin composition for cleaning a plastic molding machine of the present invention will be described in detail for each component.
１．熱可塑性樹脂：
本発明で使用される熱可塑性樹脂としては、ポリオレフィン系樹脂、メタクリル系樹脂、アクリル系樹脂、酢酸ビニル系樹脂、飽和ポリエステル系樹脂などを挙げることができる。これらの中では、ポリオレフィン系樹脂を好適に使用することができる。
1. Thermoplastic resin:
Examples of the thermoplastic resin used in the present invention include polyolefin resins, methacrylic resins, acrylic resins, vinyl acetate resins, and saturated polyester resins. In these, polyolefin resin can be used conveniently.
ポリオレフィン系樹脂としては、エチレン系樹脂及びプロピレン系樹脂が挙げられ、本発明では、洗浄用樹脂として実績のあるエチレン系樹脂が、特に好適な樹脂として使用できる。 Examples of polyolefin resins include ethylene resins and propylene resins. In the present invention, ethylene resins that have a proven record as cleaning resins can be used as particularly suitable resins.
エチレン系樹脂としては、高圧法ポリエチレン、エチレン−α−オレフィン（炭素数２〜１２）共重合体、エチレン−α，β−不飽和カルボン酸アルキルエステル共重合体、エチレン−カルボン酸ビニルエステル共重合体が挙げられ、具体的には、高圧法低密度ポリエチレン、エチレン−アクリル酸エチル共重合体、エチレン−アクリル酸ブチル共重合体、エチレン−メタクリル酸エチル共重合体、エチレン−メタクリル酸ブチル共重合体、エチレン−酢酸ビニル共重合体、エチレン−ブテン−１共重合体、エチレン−ヘキセン−１共重合体、エチレン−オクテン−１共重合体などを挙げることができる。 Examples of the ethylene resin include high-pressure polyethylene, ethylene-α-olefin (carbon number 2 to 12) copolymer, ethylene-α, β-unsaturated carboxylic acid alkyl ester copolymer, and ethylene-carboxylic acid vinyl ester copolymer. Specifically, high pressure method low density polyethylene, ethylene-ethyl acrylate copolymer, ethylene-butyl acrylate copolymer, ethylene-ethyl methacrylate copolymer, ethylene-butyl methacrylate copolymer Examples thereof include a copolymer, an ethylene-vinyl acetate copolymer, an ethylene-butene-1 copolymer, an ethylene-hexene-1 copolymer, and an ethylene-octene-1 copolymer.
本発明では、熱可塑性樹脂のメルトマスフローレートは、通常０．０１〜５ｇ／１０分であり、好ましくは０．５〜３ｇ／１０分である。これが、０．０１ｇ／１０分未満であると、得られる洗浄用樹脂組成物による成形機洗浄の際、成形機のモータートルクが上がりすぎ、プラスチック成形機そのものに過度の負荷をかけることがあり好ましくない。一方、これが５ｇ／１０分を超えると、得られる洗浄用樹脂組成物にプラスチック成形機内を洗浄する効果がなくなり好ましくない。 In this invention, the melt mass flow rate of a thermoplastic resin is 0.01-5 g / 10min normally, Preferably it is 0.5-3 g / 10min. If this is less than 0.01 g / 10 min, the motor torque of the molding machine will increase excessively when the molding machine is washed with the resulting resin composition for cleaning, and an excessive load may be applied to the plastic molding machine itself. Absent. On the other hand, if this exceeds 5 g / 10 minutes, the resulting resin composition for cleaning is not preferred because the effect of cleaning the inside of the plastic molding machine is lost.
このメルトマスフローレートが、０．０１〜５ｇ／１０分であれば、プラスチック用の押出成形機、射出成形機、インフレーション成形機のいずれも、良好に洗浄することができる。 If this melt mass flow rate is 0.01 to 5 g / 10 min, any plastic extrusion molding machine, injection molding machine, and inflation molding machine can be cleaned well.
樹脂相互間の親和性から、本発明で使用する熱可塑性樹脂と、洗浄除去されるべき樹脂組成物（被洗浄樹脂組成物）に含まれるベース樹脂は同種のものであることが好ましく、両者がエチレン系樹脂である場合の洗浄効果は、特に優れている。
なお、熱可塑性樹脂は、１種あるいは２種以上組み合わせて使用することができる。
From the affinity between resins, it is preferable that the thermoplastic resin used in the present invention and the base resin contained in the resin composition to be washed (resin composition to be washed) are of the same type, The cleaning effect in the case of an ethylene resin is particularly excellent.
In addition, a thermoplastic resin can be used 1 type or in combination of 2 or more types.
２．滑剤：
本発明において使用される滑剤は、いわゆる滑剤と界面活性剤の両者を含むものであり、滑剤としては、高級脂肪酸、高級脂肪酸アミド、高級脂肪酸ビスアミド、一価又は多価アルコールの脂肪酸エステル、高級脂肪族アルコール、ワックス並びに高級脂肪酸金属塩などが挙げられ、これらは１種或いは２種以上を組み合わせて使用することができる。
2. Lubricant:
The lubricant used in the present invention contains both a so-called lubricant and a surfactant. Examples of the lubricant include higher fatty acids, higher fatty acid amides, higher fatty acid bisamides, fatty acid esters of mono- or polyhydric alcohols, higher fats. Group alcohols, waxes, higher fatty acid metal salts, and the like, and these can be used alone or in combination of two or more.
高級脂肪酸としては、ミリスチン酸、パルミチン酸、オレイン酸、ステアリン酸、アラキジン酸、ベヘニン酸などを挙げることができる。 Examples of the higher fatty acid include myristic acid, palmitic acid, oleic acid, stearic acid, arachidic acid, and behenic acid.
高級脂肪酸アミドとしては、ラウリン酸アミド、ミリスチン酸アミド、パルミチン酸アミド、オレイン酸アミド、ステアリン酸アミド、イコ酸アミド、ポリオキシエチレン脂肪酸アミドなどを挙げることができる。この中では、オレイン酸アミドを好ましく用いることができる。 Examples of the higher fatty acid amide include lauric acid amide, myristic acid amide, palmitic acid amide, oleic acid amide, stearic acid amide, icoic acid amide, and polyoxyethylene fatty acid amide. Among these, oleic amide can be preferably used.
高級脂肪酸ビスアミドとしては、エチレンビスステアロアミド、Ｎ，Ｎ’−メチレンビスステアロアミドなどを挙げることができる。 Examples of higher fatty acid bisamides include ethylene bisstearamide, N, N′-methylenebisstearamide, and the like.
一価又は多価アルコールの脂肪酸エステルとしては、ステアリン酸ｎ−ブチルエステル、水添ロジンエステル、セバシン酸ジブチルエステル、セバシン酸ジオクチルエステル、グリセリンモノ脂肪酸エステル、グリセリンジ脂肪酸エステル、グリセリントリ脂肪酸エステル、グリセリルラクトステアリルエステル、ペンタエリスリトールステアリン酸エステル、ペンタエリスリトールステアリン酸テトラエステル、ソルビタン脂肪酸エステル、ポリエチレングリコールモノステアレート、ポリエチレングリコールジラウレート、ポリエチレングリコールモノオレエート、ポリエチレングリコールヤシ脂肪酸エステル、エタンジオールモンタン酸エステル、１，３−ブタンジオールモンタン酸エステル、ジエチレングリコールステアリン酸エステル、プロピレングリコール脂肪酸エステルなどが挙げられる。この中では、グリセリン脂肪酸エステル、特にグリセリンモノステアリン酸エステルを好ましく用いることができる。 As fatty acid esters of mono- or polyhydric alcohols, stearic acid n-butyl ester, hydrogenated rosin ester, sebacic acid dibutyl ester, sebacic acid dioctyl ester, glycerin monofatty acid ester, glycerin difatty acid ester, glycerin trifatty acid ester, glyceryl Lactose stearyl ester, pentaerythritol stearate ester, pentaerythritol stearate tetraester, sorbitan fatty acid ester, polyethylene glycol monostearate, polyethylene glycol dilaurate, polyethylene glycol monooleate, polyethylene glycol palm fatty acid ester, ethanediol montanate ester, 1 , 3-Butanediol montanic acid ester, diethylene glycol stearic acid ester Le, propylene glycol fatty acid esters. In this, glycerin fatty acid ester, especially glycerin monostearic acid ester can be used preferably.
高級脂肪酸アルコールとしては、セチルアルコール、ステアリルアルコールなどを挙げることができる。 Examples of the higher fatty acid alcohol include cetyl alcohol and stearyl alcohol.
ワックス類としては、合成パラフィン、流動パラフィン、ポリエチレンワックス、変性ポリエチレンワックス、スパチームアセチワックス、モンタンワックス、カルバナロウワックス、蜜ロウ、木ロウなどを挙げることができる。 Examples of the waxes include synthetic paraffin, liquid paraffin, polyethylene wax, modified polyethylene wax, spa steam acetyl wax, montan wax, carbanana wax, beeswax, and wood wax.
高級脂肪酸金属塩としては、上記高級脂肪酸のリチウム、カリウム、ナトリウム、カルシウム、マグネシウム、亜鉛塩などが挙げられる。 Examples of the higher fatty acid metal salt include lithium, potassium, sodium, calcium, magnesium, and zinc salts of the above higher fatty acids.
本発明においては、滑剤が、グリセリン脂肪酸エステルからなることが好ましい。
グリセリン脂肪酸エステルからなる滑剤によれば、得られる洗浄用樹脂組成物に、特に優れた自己排出性を付与することができる。
In the present invention, the lubricant is preferably composed of a glycerin fatty acid ester.
According to the lubricant composed of glycerin fatty acid ester, particularly excellent self-discharge properties can be imparted to the resulting resin composition for cleaning.
本発明においては、滑剤が、脂肪酸アミド及びグリセリン脂肪酸エステルの３：７〜７：３（質量比）、特に４：６〜６：４の混合物からなることが好ましい。
かかる混合物からなる滑剤によれば、得られる洗浄用樹脂組成物のメルトマスフローレートへの影響が少なく、好ましく使用できる。
In the present invention, the lubricant is preferably composed of a mixture of fatty acid amide and glycerin fatty acid ester in a ratio of 3: 7 to 7: 3 (mass ratio), particularly 4: 6 to 6: 4.
According to the lubricant comprising such a mixture, the resulting resin composition for cleaning has little influence on the melt mass flow rate and can be preferably used.
滑剤の配合量は、熱可塑性樹脂１００質量部に対して、１〜２０質量部、好ましくは、５〜１２質量部、更に好ましくは６〜１０質量部である。
この配合量が、１質量部未満では、成形機内に付着している樹脂（被洗浄樹脂組成物）への浸透が不十分となり、洗浄効果が低下するので好ましくない。一方、この配合量が２０質量部を超えると、溶融混練により均質な樹脂組成物を得ることが難しくなり、ペレット化しても均質な樹脂組成物が製造されず好ましくない。
The compounding quantity of a lubricant is 1-20 mass parts with respect to 100 mass parts of thermoplastic resins, Preferably, it is 5-12 mass parts, More preferably, it is 6-10 mass parts.
When the blending amount is less than 1 part by mass, the penetration into the resin (resin composition to be cleaned) adhering to the molding machine becomes insufficient and the cleaning effect is lowered, which is not preferable. On the other hand, when the blending amount exceeds 20 parts by mass, it is difficult to obtain a homogeneous resin composition by melt kneading, and even if pelletized, a homogeneous resin composition is not produced, which is not preferable.
３．特定の炭酸カルシウム（無機充填剤）：
本発明において使用される特定の炭酸カルシウムとしては、石灰石、大理石、方解石などの鉱石を粉砕した重質炭酸カルシウムや合成石である沈降性炭酸カルシウムあるいは軽質炭酸カルシウムなどを挙げることができる。これらは、いずれも使用することができるが、洗浄性能を決める硬度の点から、粒度分布が均一な合成品の炭酸カルシウムが好ましい。
特定の炭酸カルシウムの平均粒径は、分散性や洗浄効果などの点から、平均粒径は１〜３０μｍ、好ましくは２〜５μｍ、更に好ましくは２〜４μｍである。
3. Specific calcium carbonate (inorganic filler):
Examples of the specific calcium carbonate used in the present invention include heavy calcium carbonate obtained by pulverizing ore such as limestone, marble, and calcite, precipitated calcium carbonate or light calcium carbonate which is a synthetic stone. Any of these can be used, but synthetic calcium carbonate having a uniform particle size distribution is preferred from the viewpoint of the hardness that determines the cleaning performance.
The average particle size of the specific calcium carbonate is 1 to 30 μm, preferably 2 to 5 μm, and more preferably 2 to 4 μm from the viewpoint of dispersibility and cleaning effect.
また、炭酸カルシウムをステアリン酸、オレイン酸、パルミチン酸などの脂肪酸又はそのナトリウム、カルシウム、マグネシウムなどとの金属塩、パラフィン、ワックス又はこれらの変性物、有機シラン、有機チタネートなどの化合物で被覆するなどの表面処理を施したものを使用することができる。 In addition, calcium carbonate is coated with a fatty acid such as stearic acid, oleic acid or palmitic acid or a metal salt thereof such as sodium, calcium or magnesium, paraffin, wax or a modified product thereof, organic silane, organic titanate, etc. A surface-treated product can be used.
本発明では、特定の炭酸カルシウムの煮あまに油吸油量は、１００〜１６０ｍｌ／１００ｇ、好ましくは１１０〜１５０ｍｌ／１００ｇ、更に好ましくは１３０〜１５０ｍｌ／１００ｇである。
この煮あまに油吸油量が、１００ｍｌ／１００ｇ未満では、溶融混練が難しくなり、均質の樹脂組成物を得ることできず好ましくない（後述する比較例１〜４参照）。
一方、これが１６０ｍｌ／１００ｇを超えるものは、製造が困難であり入手が困難であるとともに、滑剤の作用が低下されることがあり、洗浄効果が落ちる場合があるので好ましくない。
In the present invention, the oil absorption amount of the boiled sesame of the specific calcium carbonate is 100 to 160 ml / 100 g, preferably 110 to 150 ml / 100 g, more preferably 130 to 150 ml / 100 g.
If the oil absorption is less than 100 ml / 100 g in this boiled sea bream, melt kneading becomes difficult and a homogeneous resin composition cannot be obtained (see Comparative Examples 1 to 4 described later).
On the other hand, if it exceeds 160 ml / 100 g, it is not preferred because it is difficult to produce and difficult to obtain, and the action of the lubricant may be reduced, and the cleaning effect may be reduced.
なお、本発明で煮あまに油吸油量とは、ＪＩＳ Ｋ ５１０１−１３−２に準拠して測定される顔料及び体質顔料としての炭酸カルシウムに吸収される煮あまに油の量である。 In the present invention, the boiled octopus oil absorption is the amount of boiled sesame oil absorbed by calcium carbonate as a pigment and extender pigment measured in accordance with JIS K 5101-13-2.
特定の炭酸カルシウムの配合量は、熱可塑性樹脂１００質量部に対して、５〜３０質量部、好ましくは、８〜２８質量部、更に好ましくは１０〜２５質量部である。
この配合量が、５質量部未満では、成形機内に付着している樹脂（被洗浄樹脂組成物）を取り去る効果が不十分となり、洗浄効果が低下するので好ましくない。一方、この配合量が３０質量部を超えると、得られる洗浄用樹脂組成物がもろくなり、ペレット化の効率が低下するとともに、得られる洗浄用樹脂組成物のメルトマスフローレートが低下し、洗浄時の成形機に必要以上のトルクが加わることもあるので好ましくない。
The compounding quantity of a specific calcium carbonate is 5-30 mass parts with respect to 100 mass parts of thermoplastic resins, Preferably, it is 8-28 mass parts, More preferably, it is 10-25 mass parts.
If the blending amount is less than 5 parts by mass, the effect of removing the resin (resin composition to be cleaned) adhering to the molding machine becomes insufficient and the cleaning effect is lowered, which is not preferable. On the other hand, if this blending amount exceeds 30 parts by mass, the resulting cleaning resin composition becomes brittle, the efficiency of pelletization is reduced, and the melt mass flow rate of the resulting cleaning resin composition is reduced. This is not preferable because an excessive torque may be applied to the molding machine.
４．プラスチック成形機洗浄用樹脂組成物：
本発明のプラスチック成形機洗浄用樹脂組成物は、必須成分である熱可塑性樹脂、滑剤および特定の炭酸カルシウム（無機充填剤）の所定量と、必要に応じて使用される配合物（安定剤、酸化防止剤、帯電防止剤、核剤、加工性改良剤、充填剤、分散剤、銅害防止剤、中和剤、発泡剤、気泡防止剤、着色剤）の適当量とを配合して、一般的な方法、例えば、ニーダー、バンバリーミキサー、コンティニュアスミキサー、ロールミルあるいは押出機を用いて均一に、例えば１３０〜２１０℃程度で溶融混練することによって製造することができる。
このようにして製造した本発明のプラスチック成形機洗浄用樹脂組成物は、次いで粒径２〜７ｍｍ程度のペレットに造粒し、これを洗浄用に良好に使用することができる。
4). Resin composition for plastic molding machine cleaning:
The resin composition for cleaning a plastic molding machine of the present invention comprises a predetermined amount of thermoplastic resin, lubricant and specific calcium carbonate (inorganic filler) as essential components, and a compound (stabilizer, Antioxidants, antistatic agents, nucleating agents, processability improvers, fillers, dispersants, copper damage inhibitors, neutralizers, foaming agents, antifoaming agents, colorants) It can be produced by uniformly kneading using a general method, for example, a kneader, a Banbury mixer, a continuous mixer, a roll mill or an extruder, for example, at about 130 to 210 ° C.
The resin composition for washing a plastic molding machine of the present invention thus produced can then be granulated into pellets having a particle size of about 2 to 7 mm and can be used favorably for washing.
次に実施例に基づいて本発明を更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。なお、被洗浄用着色樹脂組成物（被洗浄樹脂組成物）の調製方法、樹脂組成物の構成成分についての測定方法、並びに、実施例及び比較例で得られた洗浄用樹脂組成物の評価方法は、個別に記載された方法を除き、それぞれ以下によるものである。 EXAMPLES Next, although this invention is demonstrated further in detail based on an Example, this invention is not limited to these Examples. In addition, the preparation method of the colored resin composition for washing | cleaning (washing resin composition), the measuring method about the structural component of a resin composition, and the evaluation method of the resin composition for washing | cleaning obtained in the Example and the comparative example Are as follows, except for individually described methods.
〔被洗浄用着色樹脂組成物の調製〕
エチレン−ブテン−１共重合体（メルトマスフローレート０．７ｇ／１０分、密度０．９２０ｇ／ｃｍ3 、ＧＳ−６５０、日本ユニカー製）にカーボンブラック（ＶＵＬＣＡＮ ９Ａ３２、キャボット・スペシャリティ・ケミカルズ・インク製）及び酸化防止剤として４，４’−チオビス−（２−ｔ−ブチル−５−メチルフェノール）をそれぞれ２．５質量％及び０．５質量％となるように配合し、二軸混練押出機（ＴＥＭ- ３５Ｂ、東芝機械製）を用い１４０℃で溶融混練し、次いで平均粒径約４ｍｍのペレットに造粒して黒色ポリエチレン樹脂組成物を調製し、被洗浄用着色樹脂組成物とした。
[Preparation of colored resin composition for cleaning]
Ethylene-butene-1 copolymer (melt mass flow rate 0.7 g / 10 min, density 0.920 g / cm 3 , GS-650, manufactured by Nihon Unicar) and carbon black (VULCAN 9A32, manufactured by Cabot Specialty Chemicals, Inc.) ) And 4,4′-thiobis- (2-tert-butyl-5-methylphenol) as antioxidants are blended so as to be 2.5% by mass and 0.5% by mass, respectively, and a twin-screw kneading extruder (TEM-35B, manufactured by Toshiba Machine) was melt-kneaded at 140 ° C. and then granulated into pellets having an average particle size of about 4 mm to prepare a black polyethylene resin composition, which was used as a colored resin composition for cleaning.
〔樹脂組成物の構成成分についての測定〕
１．メルトマスフローレート：
メルトマスフローレートはＪＩＳ Ｋ ６９２２−２に準拠し、試験温度１９０℃、荷重２１．１８Ｎで測定した。単位はｇ／１０分である。
[Measurement of components of resin composition]
1. Melt mass flow rate:
The melt mass flow rate was measured according to JIS K 6922-2 at a test temperature of 190 ° C. and a load of 21.18N. The unit is g / 10 minutes.
２．煮あまに油吸油量：
煮あまに油吸油量はＪＩＳ Ｋ ５１０１−１３−２に準拠して測定した。予め予測される吸油量を基に試料１〜５ｇを平滑なガラス板上に採取し、煮あまに油（ＪＩＳ Ｋ ５４２１に規定するもの）をビュレットから徐々に試料の中央に滴下し、その都度全体をパレットナイフで十分に練り合わせた。滴下及び練合せを繰り返し、全体が硬いパテ状からパレットナイフでらせん状に巻くことができる状態に変化した時点、もしくは急激に粘度が低下する直前を終点とし、終点に至るまでの滴下量を測定した。単位は試料１００ｇ当たりの煮あまに油の滴下量（ｍｌ／１００ｇ）で表される。
2. Boiled octopus oil absorption:
The amount of oil absorption was measured according to JIS K 5101-13-2. Samples 1 to 5 g are collected on a smooth glass plate based on the oil absorption predicted in advance, and oil (as defined in JIS K 5421) is gradually dropped from the burette onto the center of the sample. The whole was thoroughly kneaded with a palette knife. Repeat dripping and kneading, and measure the amount of dripping until the end point is reached when the whole changes from a hard putty to a state where it can be wound spirally with a pallet knife, or just before the viscosity suddenly drops did. The unit is expressed as a dripping amount of oil (ml / 100 g) per 100 g of sample.
〔洗浄用樹脂組成物の評価〕
１．溶融混練性：
所定量の熱可塑性樹脂、滑剤、炭酸カルシウム及びその他の配合物をバンバリーミキサー（ＤＳ３−１０ＭＷＢ−Ｓ、森山製作所製）に投入し、１５０℃で１０分間溶融混練し、バンバリーミキサーを開け、溶融混練された樹脂組成物の均質性を目視で観察した。
明らかに均質性がなく、滑剤成分が液状に分離して観測されるものを×、外観が不均質なものを△、一様な均質である場合を○で評価し、○を合格とした。
なお、例え×と評価された樹脂組成物でも、ペレット化の操作は可能であるが、得られるペレットは不均質となることは自明であるので、当然、その洗浄用樹脂組成物としての洗浄作用の効果の品質には悪影響がある。従って、溶融混練性が×及び△と評価された例については、洗浄性・自己排出性の試験は行わなかった。
[Evaluation of cleaning resin composition]
1. Melt kneadability:
A predetermined amount of thermoplastic resin, lubricant, calcium carbonate and other compounds are put into a Banbury mixer (DS3-10MWB-S, manufactured by Moriyama Seisakusho), melt-kneaded at 150 ° C. for 10 minutes, the Banbury mixer is opened, and melt-kneaded. The homogeneity of the obtained resin composition was visually observed.
Clearly there was no homogeneity and the lubricant component was observed as separated in a liquid state. The case where the appearance was inhomogeneous was evaluated as .DELTA., And the case of uniform homogeneity was evaluated as .circleincircle.
Even if the resin composition is evaluated as x, the pelletization operation is possible, but it is obvious that the obtained pellet is inhomogeneous, so naturally, the cleaning action as the cleaning resin composition The quality of the effect is adversely affected. Therefore, for the cases where the melt-kneading property was evaluated as x and Δ, the test of cleaning property / self-discharge property was not performed.
２．洗浄性：
上記で調製した被洗浄用着色樹脂組成物１ｋｇを、単軸押出機（ラボプラストミルＤ２０−２５、東洋精機製作所製、直径２０ｍｍ）のホッパーに投入し、樹脂温度１８０℃、スクリュー回転数１００ｒｐｍにて全て押出した後、洗浄用樹脂組成物１ｋｇをホッパーに投入し、樹脂温度１８０℃、スクリュー回転数１００ｒｐｍで引続き押出し運転を行い、排出された洗浄用樹脂組成物の色相を観察した。
洗浄用樹脂組成物が全て排出される直前の排出物が黒色に近い色相として観察されたものを×、排出物が灰色、もしくは洗浄用樹脂組成物単体の色相と異なるものとして観察されたものを△、排出物の色相が洗浄用樹脂組成物単体の色相に置き換わったものを○と評価し、○を合格とした。
2. Detergency:
1 kg of the colored resin composition to be cleaned prepared as described above is put into a hopper of a single screw extruder (laboplast mill D20-25, manufactured by Toyo Seiki Seisakusho, diameter 20 mm), and the resin temperature is 180 ° C. and the screw rotation speed is 100 rpm. Then, 1 kg of the cleaning resin composition was put into a hopper, the extrusion operation was continued at a resin temperature of 180 ° C. and a screw rotation speed of 100 rpm, and the hue of the discharged cleaning resin composition was observed.
X when the discharge immediately before the cleaning resin composition is discharged is observed as a hue close to black, x when the discharge is observed as gray or different from the hue of the cleaning resin composition alone Δ, the color of the discharged product replaced with the color of the cleaning resin composition alone was evaluated as “good”, and “good” was accepted.
３．自己排出性：
上記の洗浄性の評価後、引き続き１０分間単軸押出機のスクリューを回転させて洗浄用樹脂組成物を可能な限り排出し、その後押出機からスクリューを引き抜き、当該スクリューに対する洗浄用樹脂組成物の付着状況を観察した。
スクリューの圧縮部から計量部にかけて付着物が観測されたものを×、スクリューの圧縮部、または計量部の一部に付着物が観測されたものを△、スクリューに付着物が殆ど残らなかったものを○と評価し、○を合格とした。
3. Self-emission:
After the evaluation of the cleaning property, the screw of the single screw extruder is continuously rotated for 10 minutes to discharge the cleaning resin composition as much as possible, and then the screw is pulled out from the extruder, and the cleaning resin composition for the screw is removed. The state of adhesion was observed.
X indicates that deposits were observed from the compression part to the weighing part of the screw, x indicates that deposits were observed in the compression part of the screw, or part of the weighing part, and no deposits remained on the screw. Was evaluated as ○, and ○ was regarded as acceptable.
［比較例１〜２、実施例１］
熱可塑性樹脂として、高圧法ポリエチレン（メルトマスフローレート１ｇ／１０分、密度０．９１８５ｇ／ｃｍ3 、ＤＹＮＩ−Ｖ、日本ユニカー製）１００質量部に対して；滑剤としてグリセリンモノステアリン酸エステルを１０質量部；炭酸カルシウムとして比較例１では煮あまに油吸油量３０ｍｌ／１００ｇのもの（ライトン−ＢＹ、白石カルシウム製、平均粒径２．３μｍ）、比較例２では、煮あまに油吸油量３１ｍｌ／１００ｇのもの（ホワイトンＳＳＢ赤、白石カルシウム製、平均粒径２．３μｍ）、及び実施例１では煮あまに油吸油量１４０ｍｌ／１００ｇのもの（カルライト−ＫＴ、白石カルシウム製、平均粒径２．６μｍ）の各々を１２質量部；酸化防止剤としてテトラキス［メチレン−３−（３’，５’−ジ−ｔ−ブチル−４’−ヒドロキシフェニル）プロピオネート］メタンを０．１質量部となるように配合し、これをバンバリーミキサーに投入し、１５０℃で１０分間溶融混練して樹脂組成物を得、その外観を観察した（溶融混練性の評価）。
溶融混練性を合格した樹脂組成物については、これを造粒して平均粒径約４ｍｍのペレットを得て、洗浄性及び自己排出性の評価を行った。
[Comparative Examples 1-2, Example 1]
As a thermoplastic resin, 100 parts by mass of high-pressure polyethylene (melt mass flow rate 1 g / 10 min, density 0.9185 g / cm 3 , DYNI-V, manufactured by Nihon Unicar); 10 mass of glycerin monostearate as a lubricant Parts: Calcium carbonate with oil absorption of 30 ml / 100 g in Comparative Example 1 (Ryton-BY, manufactured by Shiraishi Calcium, average particle size 2.3 μm), and in Comparative Example 2, oil absorption of 31 ml / 100 g (white white SSB red, calcium shiraishi, average particle size 2.3 μm), and in Example 1 oil absorption 140 ml / 100 g (carlite-KT, calcium shiraishi, average particle size 2) .6 μm) each 12 parts by mass; tetrakis [methylene-3- (3 ′, 5′-di-t-butyl-4 ′] as an antioxidant Hydroxyphenyl) propionate] methane was blended so as to be 0.1 part by mass, and this was put into a Banbury mixer, melt-kneaded at 150 ° C. for 10 minutes to obtain a resin composition, and its appearance was observed (melt-kneading) Sex assessment).
About the resin composition which passed the melt-kneading property, this was granulated and the pellet with an average particle diameter of about 4 mm was obtained, and washability and self-discharge property were evaluated.
各々の樹脂組成物の組成及びその評価結果は、表１に示したが、煮あまに油吸油量が、本発明の下限値より小さい、比較例１及び２では、溶融混練性が不良であり、均質な樹脂組成物が得られなかったが、実施例１は、優れた溶融混練性もち、かつその洗浄性並びに自己排出性も合格し、優れた洗浄力と、より安全性で、高品質の均質な洗浄用樹脂組成物であった。 The composition of each resin composition and the evaluation results thereof are shown in Table 1. In Comparative Examples 1 and 2, in which the oil absorption amount is less than the lower limit of the present invention, the melt kneadability is poor. Although a homogeneous resin composition was not obtained, Example 1 had excellent melt-kneading properties, passed its cleaning properties and self-discharge properties, and had excellent cleaning power, safety and high quality. This was a homogeneous cleaning resin composition.
［比較例３〜４、実施例２〜４］
比較例１で用いた煮あまに油吸収量が３０ｍｌ／１００ｇであるライトン−ＢＹ（以下、単に炭カル３０と称する）と、実施例１で用いた煮あまに油吸収量が１４０ｍｌ／１００ｇであるカルライト−ＫＴ（以下、単に炭カル１４０と称する）とを用いて、表２に示す質量比率でよく混合し、それぞれ煮あまに油吸収量が６２ｍｌ／１００ｇ、１１１ｍｌ／１００ｇ、及び１３０ｍｌ／１００ｇである炭酸カルシウムを調製した。それらを、以下、炭カル６０、炭カル１１０、及び炭カル１３０と称する。
[Comparative Examples 3-4, Examples 2-4]
Ryton-BY (hereinafter simply referred to as charcoal 30) having an oil absorption of 30 ml / 100 g in boiled corn used in Comparative Example 1 and 140 ml / 100 g in oil absorption of boiled corn used in Example 1 A certain callite-KT (hereinafter simply referred to as charcoal cal 140) was mixed well in the mass ratios shown in Table 2, and the oil absorption amount was 62 ml / 100 g, 111 ml / 100 g, and 130 ml / 100 g, respectively. A calcium carbonate was prepared. These are hereinafter referred to as charcoal cal 60, charcoal cal 110, and charcoal cal 130.
これらの、異なる煮あまに油吸収量の炭酸カルシウムを各々１２質量部用い、滑剤として、オレイン酸アミド４質量部及びグリセリンモノステアリン酸エステル５質量部の混合物を使用したことを除き、実施例１と同様に溶融混練して樹脂組成物を得、溶融混練性を評価し、これが良好な場合は、これから平均粒径約４ｍｍのペレットを得て、洗浄性及び自己排出性の評価を行った。 Example 1 except that 12 parts by weight of each of these different boiled sesame oil-absorbing calcium carbonates were used and a mixture of 4 parts by weight of oleic acid amide and 5 parts by weight of glycerol monostearate was used as a lubricant. In the same manner as above, melt-kneading was performed to obtain a resin composition, and the melt-kneading property was evaluated. When this was satisfactory, pellets having an average particle size of about 4 mm were obtained, and the cleaning property and self-discharge property were evaluated.
各々の樹脂組成物の組成及びその評価結果は、表３に示したが、煮あまに油吸油量が、本発明の下限値より小さい、炭カル３０を用いた比較例３では、溶融混練性が不良であり、炭カル６０を用いた比較例４でも均質性が不十分で、均質な樹脂組成物が得られなかったが、炭カル１１０を用いた実施例２、炭カル１３０を用いた実施例３、及び実施例１と同じ炭カル１４０を用いた実施例４は、優れた溶融混練性もち、かつその洗浄性並びに自己排出性も合格し、優れた洗浄力と、より安全性で、高品質の均質な洗浄用樹脂組成物であった。 The composition of each resin composition and the evaluation results thereof are shown in Table 3. In Comparative Example 3 using charcoal cal 30, the oil absorption amount is less than the lower limit of the present invention, the melt kneadability is shown. However, even in Comparative Example 4 using Charcoal Cal 60, the homogeneity was insufficient and a homogeneous resin composition could not be obtained, but Example 2 using Charcoal Cal 110 and Charcoal Cal 130 were used. Example 3 and Example 4 using the same charcoal cal 140 as in Example 1 have excellent melt-kneading properties, and also passed its detergency and self-discharge properties, with excellent detergency and safety. It was a high-quality homogeneous cleaning resin composition.
［実施例５〜７］
炭酸カルシウム（炭カル１４０）の配合量を１５質量部、１８質量部、及び２５質量部とした以外は、実施例４と同様にして、実施例５、６および７として、樹脂組成物を得、溶融混練性を評価し、これから平均粒径約４ｍｍのペレットを得て、洗浄性及び自己排出性の評価を行った。
[Examples 5 to 7]
Resin compositions were obtained as Examples 5, 6 and 7 in the same manner as in Example 4 except that the blending amount of calcium carbonate (carbon char 140) was 15 parts by mass, 18 parts by mass, and 25 parts by mass. Then, the melt-kneading property was evaluated, and pellets having an average particle diameter of about 4 mm were obtained therefrom, and the cleaning property and self-discharge property were evaluated.
各々の樹脂組成物の組成及びその評価結果は、表４に示したが、煮あまに油吸油量が本発明に入るこれらの洗浄用樹脂組成物は、優れた溶融混練性もち、かつその洗浄性並びに自己排出性も合格し、優れた洗浄力と、より安全性で、高品質の均質な洗浄用樹脂組成物であった。 The composition of each resin composition and the evaluation results thereof are shown in Table 4. These resin compositions for cleaning whose oil absorption amount enters the present invention are boiled and have excellent melt-kneading properties and their cleaning. As a result, it was a high-quality homogeneous cleaning resin composition with superior cleaning power and safety.
［実施例８、９］
滑剤の配合量を合計で５質量部（オレイン酸アミド２質量部・グリセリンモノステアリン酸エステル３質量部）、及び１５質量部（オレイン酸アミド７質量部・グリセリンモノステアリン酸エステル８質量部）とした以外は、実施例４と同様にして、実施例８、及び９として、樹脂組成物を得、溶融混練性を評価し、これから平均粒径約４ｍｍのペレットを得て、洗浄性及び自己排出性の評価を行った。
[Examples 8 and 9]
The total amount of the lubricant is 5 parts by mass (2 parts by mass of oleic acid amide, 3 parts by mass of glycerin monostearate) and 15 parts by mass (7 parts by mass of oleic acid amide, 8 parts by mass of glycerin monostearic acid ester) In the same manner as in Example 4, resin compositions were obtained as Examples 8 and 9, and the melt-kneading property was evaluated. From this, pellets having an average particle size of about 4 mm were obtained, and the detergency and self-discharge Sexuality was evaluated.
各々の樹脂組成物の組成及びその評価結果は、表５に示したが、これらの洗浄用樹脂組成物は、優れた溶融混練性もち、かつその洗浄性並びに自己排出性も合格し、優れた洗浄力と、より安全性で、高品質の均質な洗浄用樹脂組成物であった。 The composition of each resin composition and the evaluation results thereof are shown in Table 5, but these cleaning resin compositions have excellent melt-kneading properties, and also passed their cleaning properties and self-discharge properties, and were excellent. It was a high-quality homogeneous cleaning resin composition with higher cleaning power and safety.
［実施例１０］
熱可塑性樹脂をエチレン−ブテン−１共重合体（メルトマスフローレート０．７ｇ／１０分、密度０．９２０ｇ／ｃｍ3 、ＧＳ−６５０、日本ユニカー製）に替えた以外は実施例４と同様にして、実施例１０として、樹脂組成物を得、溶融混練性を評価し、これから平均粒径約４ｍｍのペレットを得て、洗浄性及び自己排出性の評価を行った。
[Example 10]
The same procedure as in Example 4 was conducted except that the thermoplastic resin was changed to an ethylene-butene-1 copolymer (melt mass flow rate 0.7 g / 10 min, density 0.920 g / cm 3 , GS-650, manufactured by Nihon Unicar). Then, as Example 10, the resin composition was obtained, and the melt-kneading property was evaluated. From this, pellets having an average particle size of about 4 mm were obtained, and the cleaning property and self-discharge property were evaluated.
樹脂組成物の組成及びその評価結果は、表６に示したが、この洗浄用樹脂組成物は、優れた溶融混練性もち、かつその洗浄性並びに自己排出性も合格し、優れた洗浄力と、より安全性で、高品質の均質な洗浄用樹脂組成物であった。 The composition of the resin composition and the evaluation results thereof are shown in Table 6, but this cleaning resin composition has excellent melt-kneading properties, and also passes its cleaning properties and self-discharge properties, and has excellent cleaning power. It was a safer and higher quality homogeneous cleaning resin composition.
［比較例５〜７］
炭酸カルシウムに替えて、比較例５では非晶性シリカ（煮あまに油吸油量１４０のミズカシルＰ７５４Ｃ、水澤化学工業製）１２質量部、比較例６では非晶性シリカ（煮あまに油吸油量１４８のミズパールＫ−３００、水澤化学工業製）１２質量部、及び比較例７では、ゼオライト（煮あまに油吸油量７８のシルトンＰＳ３ＬＭ、水澤化学工業製）８０質量部を使用した以外は、実施例４と同様にして、比較例５〜７として、樹脂組成物を得、溶融混練性を評価した。これらの樹脂組成物は全て良好に溶融混練できた。次いで、これらから平均粒径約４ｍｍのペレットを得て、洗浄性及び自己排出性の評価を行った。
[Comparative Examples 5 to 7]
In place of calcium carbonate, in Comparative Example 5, amorphous silica (Mizukasil P754C, oil-absorbing oil absorption 140, manufactured by Mizusawa Chemical Co., Ltd.) 12 parts by mass; in Comparative Example 6, amorphous silica (oil-absorbing oil absorption, 148 Mizupearl K-300, manufactured by Mizusawa Chemical Co., Ltd., 12 parts by mass, and Comparative Example 7 was carried out except that 80 parts by mass of zeolite (silton PS3LM with oil absorption of 78, manufactured by Mizusawa Chemical Co., Ltd.) was used In the same manner as in Example 4, as Comparative Examples 5 to 7, resin compositions were obtained, and melt kneadability was evaluated. All of these resin compositions were successfully melt kneaded. Subsequently, pellets having an average particle size of about 4 mm were obtained from these, and the cleaning property and self-discharge property were evaluated.
各々の樹脂組成物の組成及びその評価結果は、表７に示したが、煮あまに油吸油量が本発明の範囲内であるシリカを用いた比較例５、６では、自己排出性が悪く、洗浄用樹脂組成物としては好ましくないものであった。
また、煮あまに油吸油量が比較的大きいゼオライトを用いた比較例７では、良好にペレット化はできたが、自己排出性は本発明の樹脂組成物に比べて劣り、同様に好ましくないものであった。
The composition of each resin composition and its evaluation results are shown in Table 7. In Comparative Examples 5 and 6 using silica whose oil absorption is within the scope of the present invention, the self-discharge property is poor. The resin composition for cleaning was not preferable.
Moreover, in Comparative Example 7 using a zeolite having a relatively large oil absorption amount for boiled sesame, pelletization was successfully performed, but the self-discharge property was inferior to that of the resin composition of the present invention, which is also not preferable. Met.
本発明のプラスチック成形機洗浄用樹脂組成物は、それ自体安全性が高いとされている炭酸カルシウムを無機充填剤として使用していて、かつ特定の煮あまに油吸油量をもつものを使用しているので、これから得られる洗浄用樹脂組成物は、安全であり、溶融混練で均質な樹脂組成物が得られ、高品質の均質なペレットも容易に製造することができ、かつ優れた洗浄性、自己排出性をもつので、プラスチック成型機の作業終了時や樹脂の品種切り換え時の優れた洗浄用樹脂組成物として好適に使用することができる。
The resin composition for cleaning a plastic molding machine according to the present invention uses calcium carbonate, which is considered to be highly safe, as an inorganic filler, and has a specific boiled oil with an oil absorption amount. Therefore, the resin composition for cleaning obtained from this is safe, a homogeneous resin composition can be obtained by melt-kneading, high-quality homogeneous pellets can be easily produced, and excellent cleaning properties Since it has self-discharge properties, it can be suitably used as an excellent cleaning resin composition at the end of the operation of the plastic molding machine or at the time of switching the resin type.
Claims (5)
The plastic molding machine according to any one of claims 1 to 4, wherein the thermoplastic resin is an ethylene resin, and the resin composition to be cleaned is also an ethylene resin composition. Cleaning resin composition.
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| JP2009179746A (en) * | 2008-01-31 | 2009-08-13 | Achilles Corp | Thermoplastic resin composition comprising liquid additive, and method for producing the same |
| JP2012528202A (en) * | 2008-03-26 | 2012-11-12 | エコピューロ・エルエルシー | Structurally reinforced plastic reinforced with filler |
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| JP7036478B1 (en) * | 2020-11-27 | 2022-03-15 | 林化成株式会社 | Detergent for molding machines |
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| JP7036478B1 (en) * | 2020-11-27 | 2022-03-15 | 林化成株式会社 | Detergent for molding machines |
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