JP2595782B2 - Method for kneading polyolefin and inorganic filler - Google Patents
Method for kneading polyolefin and inorganic fillerInfo
- Publication number
- JP2595782B2 JP2595782B2 JP2197072A JP19707290A JP2595782B2 JP 2595782 B2 JP2595782 B2 JP 2595782B2 JP 2197072 A JP2197072 A JP 2197072A JP 19707290 A JP19707290 A JP 19707290A JP 2595782 B2 JP2595782 B2 JP 2595782B2
- Authority
- JP
- Japan
- Prior art keywords
- particle size
- average particle
- inorganic filler
- weight
- polyolefin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Processes Of Treating Macromolecular Substances (AREA)
- Sealing Material Composition (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Inorganic Insulating Materials (AREA)
- Insulated Conductors (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、ポリオレフィンと無機充填剤との混練方法
に関するものである。The present invention relates to a method for kneading a polyolefin and an inorganic filler.
［従来の技術］ ポリオレフィンは電気絶縁性に優れ、比較的安価でし
かも加工が容易であることから電気機器の材料や、電線
やケーブルのシース、絶縁体や、フィルム、パイプ等あ
らゆる分野で使用されている。このようなポリオレフィ
ンは、通常、安定剤、酸化防止剤の他に無機充填剤を添
加して用いられている。[Prior art] Polyolefin is excellent in electrical insulation, relatively inexpensive and easy to process, so it is used in various fields such as electric equipment materials, electric wire and cable sheaths, insulators, films and pipes. ing. Such a polyolefin is generally used by adding an inorganic filler in addition to a stabilizer and an antioxidant.
無機充填剤は、強度及び成形性を向上させる目的でポ
リオレフィンに混和されるものであり、２軸押出機を用
いてポリオレフィンのペレットと混練することにより混
練と抽出を一工程で行うことができる。The inorganic filler is mixed with the polyolefin for the purpose of improving strength and moldability, and can be kneaded and extracted in one step by kneading with a polyolefin pellet using a twin-screw extruder.
［発明が解決しようとする課題］ しかしながら、粒径3mm程度のポリオレフィンペレッ
トに対し、無機充填剤は本来10μｍ以下の微粒であるた
め、押出機で両者を混練する際に無機充填剤が凝集して
均一に混練し難く、混練効率が悪い。[Problems to be Solved by the Invention] However, for polyolefin pellets having a particle size of about 3 mm, since the inorganic filler is originally fine particles of 10 μm or less, the inorganic filler aggregates when both are kneaded with an extruder. It is difficult to knead uniformly and the kneading efficiency is poor.
また、得られる成形体の機械的強度が低下するととも
に、微粒の無機充填剤が飛散し人体に悪影響を及ぼす恐
れがある。In addition, the mechanical strength of the obtained molded body may be reduced, and fine inorganic fillers may be scattered to adversely affect the human body.
［発明の目的］ 本発明は、かかる点に鑑みてなされたものであり、無
機充填組成物の生産性の向上及び当該組成物から得られ
る成形体の機械的強度の向上を図れる他、人体への安全
性を向上できるポリオレフィンと無機充填剤との混練方
法を提供することを目的とするものである。[Object of the Invention] The present invention has been made in view of the above points, and can improve the productivity of an inorganic filling composition and the mechanical strength of a molded article obtained from the composition, and can be applied to the human body. It is an object of the present invention to provide a method for kneading a polyolefin and an inorganic filler, which can improve the safety of the composition.
［課題を解決するための手段］ 本発明は上記目的を達成するために、平均粒径3mm〜5
mmのポリオレフィンペレットと、無機充填剤をパラフィ
ンと共に造粒した平均粒径が上記ポリオレフィンペレッ
トの平均粒径の0.1〜５倍の造粒物と押出機中で混練す
ることを特徴としている。[Means for Solving the Problems] In order to achieve the above object, the present invention provides an average particle size of 3 mm to 5 mm.
The polyolefin pellets are characterized in that they are kneaded in an extruder with a polyolefin pellet having a particle size of 0.1 to 5 times the average particle size of the above-mentioned polyolefin pellets.
［作用］ 以上のように構成された本発明においては、押出機に
よりポリオレフィンと無機充填剤を混練する際に、混練
効率を向上できる。また、無機充填剤がポリオレフィン
に対して均一に混和されるため、製造された組成物は均
一な機械的強度を有する。さらに、無機充填剤が飛散す
るようなことがなくなり、人体への悪影響を防止でき
る。[Function] In the present invention configured as described above, the kneading efficiency can be improved when the polyolefin and the inorganic filler are kneaded by an extruder. In addition, since the inorganic filler is uniformly mixed with the polyolefin, the manufactured composition has uniform mechanical strength. Furthermore, it is possible to prevent the inorganic filler from being scattered, thereby preventing adverse effects on the human body.
［実施例］ 本発明に係るポリオレフィンとしては、エチレンプロ
ピレンゴム、ポリエチレン、エチレンブテンコポリマ、
エチレン酢酸ビニルコポリマ、エチレンエチルアクリレ
ートコポリマ、エチレンメチルメトクリレートコポリ
マ、エチレンメタクリレートコポリマ等を、単独また数
種併用して使用する。また、このようなポリオレフィン
は、押出機において混練し易いように、予め球あるいは
円柱形のペレットに成形したものを使用する。[Examples] As the polyolefin according to the present invention, ethylene propylene rubber, polyethylene, ethylene butene copolymer,
Ethylene vinyl acetate copolymer, ethylene ethyl acrylate copolymer, ethylene methyl methacrylate copolymer, ethylene methacrylate copolymer and the like are used alone or in combination of several kinds. Further, such a polyolefin used is preliminarily formed into a spherical or cylindrical pellet so as to be easily kneaded in an extruder.
一方、無機充填剤としては、炭酸カルシウム、クレ
ー、タルク、シリカ、メタ珪酸カルシウム、硫酸カルシ
ウム、リトポン等を、単独または数種併用して使用す
る。このような無機充填剤は、パラフィンをバインダと
して球あるいは円柱形に造粒する。この場合の粒径は上
記ポリオレフィンペレットの粒径の0.1〜５倍の範囲と
する。造粒方法としては、圧縮造粒、流動層造粒、遠心
流動造粒、攪拌造粒、スプレー造粒等がある。On the other hand, as the inorganic filler, calcium carbonate, clay, talc, silica, calcium metasilicate, calcium sulfate, lithopone and the like are used alone or in combination of several kinds. Such an inorganic filler is granulated into a sphere or a column using paraffin as a binder. The particle size in this case is in the range of 0.1 to 5 times the particle size of the polyolefin pellet. Examples of the granulation method include compression granulation, fluidized bed granulation, centrifugal fluidized granulation, stirring granulation, and spray granulation.
また、上記無機充填剤に加えて酸化防止剤、滑剤、分
散剤、架橋剤等を適宜添加しても良い。Further, in addition to the inorganic filler, an antioxidant, a lubricant, a dispersant, a crosslinking agent, and the like may be appropriately added.
次に、本発明の実施例を比較例と対比して説明する。 Next, examples of the present invention will be described in comparison with comparative examples.
試料としては、以下のように、本発明に係る試料（実
施例）として４種（No.1〜No.4）、比較試料として２種
（No.5、No.6）を準備した。As samples, four types (No. 1 to No. 4) as samples according to the present invention (Examples) and two types (No. 5 and No. 6) as comparative samples were prepared as follows.
No.1:エチレン酢酸ビニルコポリマ（平均粒径3mm）（メ
ルトインデックス1g/10min（190℃）、酢酸ビニル25重
量％含有） 100重量部 クレー造粒物（平均粒径4mm）（平均粒径１μｍの焼成
クレー使用、パラフィンバインダ５重量％含有）50重量
部 No.2:エチレン酢酸ビニルコポリマ（平均粒径3mm）（メ
ルトインデックス1g/10min（190℃）、酢酸ビニル25重
量％含有） 100重量部 クレー造粒物（平均粒径4mm）（平均粒径１μｍの焼成
クレー使用、パラフィンバインダ５重量％含有） 100重
量部 No.3:エチレンエチルアクリレートコポリマ（平均粒径5
mm）（メルトインデックス1g/10min（190℃）、エチル
アクリレート20重量％含有） 100重量部 タルク造粒物（平均粒径2mm）（平均粒径１μｍのタル
ク使用、パラフィンバインダ８重量％含有） 30重量部 No.4:エチレン酢酸ビニルコポリマ（平均粒径3mm）（メ
ルトインデックス1g/10min（190℃）、酢酸ビニル25重
量％含有） 50重量部 エチレンエチルアクリレートコポリマ（平均粒径5mm）
（メルトインデックス1g/10min（190℃）、エチルアク
リレート20重量％含有） 50重量部 タルク造粒物（平均粒径2mm）（平均粒径１μｍのタル
ク使用、パラフィンバインダ８重量含有） 120重量部 No.5:エチレン酢酸ビニルコポリマ（平均粒径3mm）（メ
ルトインデックス1g/10min（190℃）、酢酸ビニル25重
量％含有） 100重量部 タルク（平均粒径１μｍ、造粒なし） 100重量部 No.6:エチレンエチルアクリレートコポリマ（平均粒径5
mm）（メルトインデックス1g/10min（190℃）、エチル
アクリレート20重量％含有） 100重量部 タルク造粒物（平均粒径0.1mm）（平均粒径１μｍのタ
ルク使用、パラフィンバインダ５重量％含有）80重量部 上記の試料No.1〜No.4、No.6における無機充填剤の造
粒は、パラフィンワックスをバインダとして転動法によ
り行った。また、上記のすべての試料（No.1〜No.6）に
は、１重量部のステアリン酸と１重量部の4,4−チオビ
スー（６ー第３ブチルー３ーメチルフェノール）を添加
した。No.1: Ethylene vinyl acetate copolymer (average particle size 3 mm) (melt index 1 g / 10 min (190 ° C.), containing 25% by weight of vinyl acetate) 100 parts by weight Clay granules (average particle size 4 mm) (average particle size 1 μm) No. 2: Ethylene vinyl acetate copolymer (average particle size: 3 mm) (melt index: 1 g / 10 min (190 ° C.), vinyl acetate: 25% by weight) 100 parts by weight Clay granulated product (average particle size 4 mm) (using calcined clay having an average particle size of 1 μm, containing 5% by weight of paraffin binder) 100 parts by weight No. 3: ethylene ethyl acrylate copolymer (average particle size 5
mm) (melt index 1g / 10min (190 ° C), ethyl acrylate 20% by weight) 100 parts by weight talc granules (average particle size 2mm) (using talc with an average particle size of 1μm, containing 8% by weight of paraffin binder) 30 Parts by weight No.4: Ethylene vinyl acetate copolymer (average particle size 3 mm) (melt index 1 g / 10 min (190 ° C), containing 25% by weight of vinyl acetate) 50 parts by weight Ethylene ethyl acrylate copolymer (average particle size 5 mm)
(Melt index 1g / 10min (190 ° C), Ethyl acrylate 20% by weight) 50 parts by weight Granulated talc (average particle diameter 2mm) (Use of talc with average particle diameter 1μm, 8 parts by weight of paraffin binder) 120 parts by weight No .5: Ethylene vinyl acetate copolymer (average particle size 3 mm) (melt index 1 g / 10 min (190 ° C), containing 25% by weight of vinyl acetate) 100 parts by weight Talc (average particle size 1 μm, no granulation) 100 parts by weight No. 6: Ethylene ethyl acrylate copolymer (average particle size 5
mm) (Melt index 1g / 10min (190 ° C), Ethyl acrylate 20% by weight) 100 parts by weight Talc granules (average particle size 0.1mm) (Use talc with average particle size 1μm, contain 5% by weight paraffin binder) 80 parts by weight Granulation of the inorganic filler in the above samples No. 1 to No. 4 and No. 6 was performed by a rolling method using paraffin wax as a binder. Further, to all the samples (No. 1 to No. 6), 1 part by weight of stearic acid and 1 part by weight of 4,4-thiobis- (6-tert-butyl-3-methylphenol) were added.
上記各試料（No.1〜No.6）を混合機で混合した後、16
0℃に保持した同方向回転の20m/m2軸押出機（L/D＝30）
により混練と押出を１工程で行い、50μｍ厚の和紙を縦
添えしながら、外径1.8mmの導体上に厚さ1.1mmで押出被
覆した。After mixing each of the above samples (No. 1 to No. 6) with a mixer,
20m / m2 screw extruder rotating at the same direction at 0 ℃ (L / D = 30)
Was kneaded and extruded in a single step, and was vertically coated with a 1.1 μm thick conductor on a 1.8 mm outer diameter conductor while vertically attaching 50 μm thick Japanese paper.
その後、上記導体及び和紙を取り除き、各試料につき
10個のサンプル片を用意し、ショッパ型引張試験機を用
いて引張速度200mm/minでもって引っぱり強さ及び伸長
度を測定した。結果を第１表に示した。After that, remove the conductor and washi paper, and
Ten sample pieces were prepared, and the tensile strength and elongation were measured at a tensile speed of 200 mm / min using a Shopper type tensile tester. The results are shown in Table 1.
表から明らかなように、本発明に係る試料（No.1〜N
o.4）は、比較例の試料（No.5、No.6）に比べて、引張
強度及び伸長度ともに高い値を示す上、バラツキが小さ
い。すなわち、無機充填剤の分散が均一であるため、成
形体の機械的強度も均一化される。 As is clear from the table, the samples according to the present invention (Nos.
o.4) shows higher values in both tensile strength and elongation than the samples of the comparative examples (No.5 and No.6), and has less variation. That is, since the dispersion of the inorganic filler is uniform, the mechanical strength of the molded body is also uniformed.
［発明の効果］ 以上説明してきたように、本発明は、平均粒径3mm〜5
mmのポリオレフィンペレットと、無機充填剤をパロフィ
ンと共に造粒した平均粒径が上記ポリオレフィンペレッ
トの平均粒径の0.1〜５倍の造粒物とを押出機中で混練
するものであり、混練効率を向上でき、また、無機充填
剤がポリオレフィンに対して均一に混和されることによ
り、優れた機械的特性（高強度及び均一）を有する成形
体を実現できるようになる。さらに、無機充填剤の飛散
を防止できるようになり、人体への安全性を向上でき
る。[Effects of the Invention] As described above, the present invention has an average particle size of 3 mm to 5 mm.
mm polyolefin pellets, and an average particle size obtained by granulating an inorganic filler together with parofin is kneaded with a granulated product having an average particle size of 0.1 to 5 times the average particle size of the polyolefin pellets in an extruder. It can be improved, and a molded article having excellent mechanical properties (high strength and uniformity) can be realized by uniformly mixing the inorganic filler with the polyolefin. Further, scattering of the inorganic filler can be prevented, and safety to the human body can be improved.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭63−207617（ＪＰ，Ａ) 特開 昭48−92441（ＪＰ，Ａ) 特開 昭60−106807（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-207617 (JP, A) JP-A-48-92441 (JP, A) JP-A-60-106807 (JP, A)
Claims (1)
トと、無機充填剤をパラフィンと共に造粒した平均粒径
が上記ポリオレフィンペレットの平均粒径の0.1〜５倍
の造粒物とを押出機中で混練することを特徴とするポリ
オレフィンと無機充填剤との混練方法。1. An extruder comprising a polyolefin pellet having an average particle size of 3 mm to 5 mm and a granulated product obtained by granulating an inorganic filler with paraffin and having an average particle size of 0.1 to 5 times the average particle size of the polyolefin pellet. A method for kneading a polyolefin and an inorganic filler, characterized in that the kneading is carried out in a kneading process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2197072A JP2595782B2 (en) | 1990-07-25 | 1990-07-25 | Method for kneading polyolefin and inorganic filler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2197072A JP2595782B2 (en) | 1990-07-25 | 1990-07-25 | Method for kneading polyolefin and inorganic filler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0481440A JPH0481440A (en) | 1992-03-16 |
| JP2595782B2 true JP2595782B2 (en) | 1997-04-02 |
Family
ID=16368251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2197072A Expired - Fee Related JP2595782B2 (en) | 1990-07-25 | 1990-07-25 | Method for kneading polyolefin and inorganic filler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2595782B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2714326B1 (en) * | 1993-12-28 | 1996-03-01 | Luzenac Talc | Process for treating a talcum powder in order to incorporate it into a material, in particular a thermoplastic material. |
| GB2320456B (en) | 1996-12-18 | 2001-09-05 | Fip Holdings Ltd | Polymer processing method |
| GB2378705B (en) | 1998-08-26 | 2003-03-26 | Pvaxx Technologies Ltd | PVA-Containing compositions |
| GB0005016D0 (en) | 2000-03-01 | 2000-04-26 | Jumik Technologies Limited | PVA-Containing compositions |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5527100B2 (en) * | 1972-03-11 | 1980-07-18 | ||
| JPS60106807A (en) * | 1983-11-15 | 1985-06-12 | Mitsui Petrochem Ind Ltd | Ultrahigh molecular weight polyolefin powder |
| JPS63207617A (en) * | 1987-02-24 | 1988-08-29 | Mitsui Toatsu Chem Inc | Manufacture of polyolefin resin composition containing inorganic filler |
-
1990
- 1990-07-25 JP JP2197072A patent/JP2595782B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0481440A (en) | 1992-03-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |