JPH06351B2 - Inorganic filler Highly filled thermoplastic resin molding manufacturing method - Google Patents
Inorganic filler Highly filled thermoplastic resin molding manufacturing methodInfo
- Publication number
- JPH06351B2 JPH06351B2 JP63086744A JP8674488A JPH06351B2 JP H06351 B2 JPH06351 B2 JP H06351B2 JP 63086744 A JP63086744 A JP 63086744A JP 8674488 A JP8674488 A JP 8674488A JP H06351 B2 JPH06351 B2 JP H06351B2
- Authority
- JP
- Japan
- Prior art keywords
- thermoplastic resin
- inorganic filler
- temperature
- highly filled
- injection molding
- 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 - Lifetime
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は無機フィラー高充填熱可塑性樹脂成形体の製造
方法に関し、詳しくは射出成形によって、耐衝撃性に優
れた無機フィラー高充填熱可塑性樹脂成形体を製造する
方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for producing a thermoplastic resin molding having a high inorganic filler content, and more specifically, a thermoplastic resin having a high inorganic filler content and excellent impact resistance obtained by injection molding. The present invention relates to a method for producing a molded body.
（従来の技術） 熱可塑性樹脂は低廉で、しかも優れた機械的、電気的特
性を有することから、電気および電子部品、建材、自動
車部材などとして幅広い分野で大量に使用されている。(Prior Art) Since thermoplastic resins are inexpensive and have excellent mechanical and electrical properties, they are used in large amounts in a wide range of fields as electric and electronic parts, building materials, automobile members and the like.
これら製品の製造には、射出成形法が、生産性に優れ、
大量生産に適し、しかも製品の肌が美麗に仕上がること
から、一般に採用されている。For the production of these products, the injection molding method has excellent productivity,
It is generally used because it is suitable for mass production and the product has a beautiful finish.
しかし、熱可塑性樹脂自体は耐熱性に劣り、また燃え易
いなどの欠点があることから、これら耐熱性、難燃性な
どの熱的性質を向上させるため熱可塑性樹脂に無機フィ
ラーを充填し、得られた熱可塑性樹脂材料を射出成形し
て目的製品とする方法が採られている。しかしながら、
無機フィラーの充填量を増加させると製品の熱的性質は
改善されるものの、機械的強度、特に耐衝撃性が大幅に
低下するので、現在では無機フィラーの充填量が２０〜
４０重量％程度の無機フィラー低充填熱可塑性樹脂成形
体が生産されているにすぎない。However, since the thermoplastic resin itself is poor in heat resistance and has drawbacks such as easy burning, heat resistance, in order to improve thermal properties such as flame retardancy, the thermoplastic resin is filled with an inorganic filler to obtain A method is adopted in which the obtained thermoplastic resin material is injection molded into a target product. However,
Although the thermal property of the product is improved by increasing the filling amount of the inorganic filler, the mechanical strength, particularly the impact resistance is significantly lowered, so that the filling amount of the inorganic filler is currently 20-
Only 40% by weight of an inorganic filler low-filling thermoplastic resin molding is produced.
（発明が解決しようとする課題） 上記したように、熱可塑性樹脂の熱的性質を改良するた
めには、無機フィラーを多量に配合して、射出成形する
のが望ましいが、従来の射出成形法によって得られる無
機フィラー高充填熱可塑性樹脂成形体は、熱可塑性樹脂
単独の成形体あるいは無機フィラー低充填熱可塑性樹脂
成形体に比較して耐衝撃性が低く、実用的でないという
問題があった。(Problems to be Solved by the Invention) As described above, in order to improve the thermal properties of the thermoplastic resin, it is desirable to mix a large amount of an inorganic filler and perform injection molding. The thermoplastic resin molded product with a high inorganic filler content obtained by the method has a problem that it has a lower impact resistance than a molded product of a thermoplastic resin alone or a thermoplastic resin molded product with a low inorganic filler content and is not practical.
本発明は、上記問題を解決し、無機フィラー高充填熱可
塑性樹脂材料を射出成形して実用化に十分な優れた耐衝
撃性を有する無機フィラー高充填熱可塑性樹脂成形体を
製造する方法を提供することを目的とするものである。The present invention solves the above problems and provides a method for producing an inorganic filler highly filled thermoplastic resin molding having excellent impact resistance by injection molding an inorganic filler highly filled thermoplastic resin material, which is sufficiently practical. The purpose is to do.
（課題を解決するための手段） 本発明者らは、鋭意検討の結果、無機フィラー高充填熱
可塑性樹脂材料は、射出成形機の金型温度を高温にする
に従って耐衝撃性が向上するという、熱可塑性樹脂単独
あるいは低充填熱可塑性樹脂材料とは異なる特性を示
し、しかも金型の温度を特定な範囲内に設定する場合の
み優れた耐衝撃性が得られることを見出し、この知見に
基づいて本発明を完成するに至った。(Means for Solving the Problem) As a result of earnest studies, the inventors of the present invention have found that an inorganic filler highly filled thermoplastic resin material has improved impact resistance as the mold temperature of an injection molding machine is increased. Based on this finding, it was found that the thermoplastic resin shows properties different from those of the thermoplastic resin alone or the low filling thermoplastic resin material, and that excellent impact resistance can be obtained only when the mold temperature is set within a specific range. The present invention has been completed.
即ち、本発明は、熱可塑性樹脂１００重量部に対し無機
フィラーを２００〜４００重量部配合した無機フィラー
高充填熱可塑性樹脂材料を射出成形するにあたり、射出
成形機の金型温度を上記樹脂材料の熱変形温度と該温度
より２０℃低い温度の範囲内の温度にすることを特徴と
する無機フィラー高充填熱可塑性樹脂成形体の製造方法
に関する。That is, according to the present invention, in injection molding an inorganic filler highly filled thermoplastic resin material in which 200 to 400 parts by weight of an inorganic filler is mixed with 100 parts by weight of a thermoplastic resin, the mold temperature of an injection molding machine is set to The present invention relates to a method for producing a thermoplastic resin molded product having a high filling amount of an inorganic filler, which comprises setting a temperature within a range of a heat distortion temperature and a temperature lower than the temperature by 20 ° C.
以下、本発明を詳細に説明する。Hereinafter, the present invention will be described in detail.
本発明で使用する熱可塑性樹脂としては、一般の熱可塑
性樹脂が使用可能であり、その代表例としては、ポリプ
ロピレンなどのポリオレフィン樹脂、ポリスチレン、ア
クリロニトリル−スチレン共重合体などのスチレン系樹
脂、塩化ビニル樹脂、ポリメチルメタクリレート樹脂な
どを挙げることができる。As the thermoplastic resin used in the present invention, general thermoplastic resins can be used, and typical examples thereof include polyolefin resins such as polypropylene, polystyrene, styrene resins such as acrylonitrile-styrene copolymer, and vinyl chloride. Resin, polymethylmethacrylate resin, etc. can be mentioned.
上記熱可塑性樹脂に配合する無機フィラーとしては、各
種金属の酸化物、水酸化物、炭酸塩、硫酸塩、けい酸
塩、けい酸塩鉱物、炭化物、セラミックスなどを使用す
ることができる。特に、周期律表第ＩＩ族もしくは第Ｉ
ＩＩ族の水酸化物、酸化物、炭酸塩または硫酸塩が好ま
しく、その具体例としては水酸化アルミニウム、水酸化
マグネシウム、水酸化カルシウム、水酸化バリウム、カ
ルシウム・アルミネート水和物などの水酸化物；酸化マ
グネシウム、酸化カルシウム、酸化アルミニウムなどの
酸化物；炭酸カルシウム、炭酸バリウムなどの炭酸塩；
硫酸バリウムなどの硫酸塩などを挙げることができる。
その他、タルク、マイカなども好ましく使用される。As the inorganic filler to be blended with the thermoplastic resin, various metal oxides, hydroxides, carbonates, sulfates, silicates, silicate minerals, carbides, ceramics and the like can be used. In particular, Group II or Group I of the Periodic Table
Group II hydroxides, oxides, carbonates or sulfates are preferred, and specific examples thereof include hydroxides of aluminum hydroxide, magnesium hydroxide, calcium hydroxide, barium hydroxide, calcium aluminate hydrate and the like. Substances; oxides such as magnesium oxide, calcium oxide and aluminum oxide; carbonates such as calcium carbonate and barium carbonate;
Examples thereof include sulfates such as barium sulfate.
In addition, talc and mica are also preferably used.
上記無機フィラーの粒径については、特に制限はなく、
一般に使用されている程度の粒径を有する無機フィラー
を使用することができる。通常、平均粒径が１ｍｍ以
下、好ましくは１００μｍ以下のものが使用される。な
お、平均粒径が１μｍ以下の細粒となると樹脂に均一に
分散させるのが困難となる。The particle size of the inorganic filler is not particularly limited,
It is possible to use an inorganic filler having a particle size that is generally used. Usually, those having an average particle size of 1 mm or less, preferably 100 μm or less are used. If the average particle size is 1 μm or less, it becomes difficult to uniformly disperse it in the resin.
本発明における無機フィラーの配合量は、熱可塑性樹脂
１００重量部に対し２００〜４００重量部、好ましくは
少なくとも２５０重量部である。この配合量の上限は、
配合する熱可塑性樹脂の種類、改質の目的、配合樹脂材
料の加工性、製品の使用目的などによって変わるので、
一慨に特定できないが、配合量が多過ぎると配合樹脂材
料の加工性が低下するので４００重量部程度以下にする
のがよい。The blending amount of the inorganic filler in the present invention is 200 to 400 parts by weight, preferably at least 250 parts by weight, based on 100 parts by weight of the thermoplastic resin. The upper limit of this amount is
It depends on the type of thermoplastic resin to be compounded, the purpose of modification, the processability of the compounded resin material, the purpose of use of the product, etc.
Although it cannot be specified in a lump sum, if the blending amount is too large, the workability of the blended resin material will be deteriorated, so it is preferable to set it to about 400 parts by weight or less.
本発明で使用する熱可塑性樹脂材料は、上記無機フィラ
ーと熱可塑性樹脂とを、例えば一軸もしくは二軸混練ス
クリューを備えた混練機を用いて、均一に混合すること
によって調製される。特に、本出願人らが先に提案した
ような（特願昭６２−７３６３９参照）、混練処理に消
費される機械的エネルギーの大きい装置を用いて混練す
ると一層均一に混合することができる。The thermoplastic resin material used in the present invention is prepared by uniformly mixing the inorganic filler and the thermoplastic resin with, for example, a kneader equipped with a uniaxial or biaxial kneading screw. In particular, more uniform mixing can be achieved by kneading using a device that has large mechanical energy consumed in the kneading treatment as previously proposed by the present applicants (see Japanese Patent Application No. 62-73639).
本発明においては、上記のようにして得られた無機フィ
ラー高充填熱可塑性樹脂材料を射出成形して所望形状の
成形体とするが、この際、射出成形機の金型の温度を無
機フィラー高充填熱可塑性樹脂材料の熱変形温度と該温
度よりも２０℃低い温度の範囲内の温度に設定して射出
成形を行う。金型の温度が上記範囲よりも高くても、あ
るいは低くても、耐衝撃性が著しく低下して、本発明の
目的を達成することができない。In the present invention, the inorganic filler highly-filled thermoplastic resin material obtained as described above is injection-molded to obtain a molded article having a desired shape. At this time, the temperature of the mold of the injection molding machine is set to be higher than that of the inorganic filler. Injection molding is performed by setting the temperature within the range of the heat distortion temperature of the filled thermoplastic resin material and a temperature 20 ° C. lower than the temperature. Even if the temperature of the mold is higher or lower than the above range, the impact resistance is significantly lowered, and the object of the present invention cannot be achieved.
本発明における射出成形機の金型の温度とは、金型キャ
ビティーの表面温度であり、また無機フィラー高充填熱
可塑性樹脂材料の熱変形温度とはＪＩＳ−Ｋ７２０７
（荷重１８．５ｋｇ・ｆ／ｃｍ2）に規定の方法によっ
て測定したものである。The temperature of the mold of the injection molding machine in the present invention is the surface temperature of the mold cavity, and the heat distortion temperature of the thermoplastic resin material highly filled with inorganic filler is JIS-K7207.
It is measured by a specified method at (load of 18.5 kg · f / cm 2 ).
（実施例） 以下、実施例を挙げて本発明を更に具体的に説明する。(Examples) Hereinafter, the present invention will be described more specifically with reference to Examples.
実施例１ ポリプロピレン（商品名：チッソＫ４０１７、チッソ
（株）製）１００重量部に対しカルシウム・アルミネー
ト水和物（３ＣａＯ・Ａｌ2Ｏ3・６Ｈ2Ｏ）（商品名：
ＮＣＡ１０３、日本軽金属（株）製、平均粒径３μｍ）
またはマイカ（白雲母、大阪マイカ工業所（株）製、平
均粒径２０μｍ）を第１表に示す量で配合し、押出混練
機にて比エネルギー０．７〜０．９ｋｗ・ｈｒ／ｋｇ、
シリンダー温度２００℃の条件下に混練、押出してペレ
ットを製造した。Example 1 Polypropylene (trade name: Chisso K4017, Chisso Co.) calcium aluminate hydrate to 100 parts by weight (3CaO · Al 2 O 3 · 6H 2 O) ( trade name:
NCA103, manufactured by Nippon Light Metal Co., Ltd., average particle size 3 μm)
Alternatively, mica (muscovite, manufactured by Osaka Mica Industry Co., Ltd., average particle size 20 μm) was blended in an amount shown in Table 1 and specific energy was 0.7 to 0.9 kw · hr / kg by an extrusion kneader.
Pellets were manufactured by kneading and extruding under the condition of a cylinder temperature of 200 ° C.
このペレットを用いて１２５ｔ射出成形機で成形温度を
２００℃とし、第１表に示す射出圧、保圧ならびに金型
温度で射出成形をして、５ｍｍ×９７ｍｍ×１６７ｍｍ
の試験片を作成した。Using these pellets, the molding temperature was set to 200 ° C. with a 125t injection molding machine, and injection molding was performed at the injection pressure, the holding pressure and the mold temperature shown in Table 1 to obtain 5 mm × 97 mm × 167 mm.
A test piece was prepared.
この試験片について引張強度、シャルピー衝撃強度をそ
れぞれＪＩＳ−Ｋ７１１３、ＪＩＳ−Ｋ７１１１規定の
方法により測定した。結果を第１表に示す。The tensile strength and the Charpy impact strength of this test piece were measured by the methods specified in JIS-K7113 and JIS-K7111, respectively. The results are shown in Table 1.
なお、上記のフィラー充填ポリプロピレン材料の熱変形
温度は、ＪＩＳ−Ｋ７２０７規定の方法（荷重：１８．
５ｋｇ・ｆ／ｃｍ2）により測定し、「射出成形用材料
の熱変形温度」として第１表に示した。The heat deformation temperature of the above-mentioned filler-filled polypropylene material is determined according to JIS-K7207 (load: 18.
It was measured at 5 kg · f / cm 2 ) and is shown in Table 1 as “heat distortion temperature of injection molding material”.
第１表の結果から、無機フィラーを含有しないポリプロ
ピレンあるいは無機フィラーの充填量が少ない無機フィ
ラー低充填ポリプロピレンを射出成形する場合は、射出
成形機の金型温度を低くしたほうが耐衝撃性が高いが
（実験番号２６〜３０、３６〜３９、４０〜４４）、無
機フィラーの充填量が多い無機フィラー高充填ポリプロ
ピレンの場合は、金型温度を高くしたほうが耐衝撃性が
高く（実験番号１〜２０、２１〜２５、３１〜３５）、
しかも金型温度が、特に無機フィラー充填ポリプロピレ
ン材料の熱変性温度と該温度より２０℃低い温度範囲に
ある時、耐衝撃性が良好であることが理解される（実験
番号９〜１６、２３〜２４、３３〜３４）。 From the results of Table 1, when injection molding polypropylene containing no inorganic filler or polypropylene filled with a small amount of inorganic filler is injected, lowering the mold temperature of the injection molding machine gives higher impact resistance. (Experiment Nos. 26 to 30, 36 to 39, 40 to 44), in the case of the inorganic filler highly filled polypropylene having a large amount of the inorganic filler, the higher the mold temperature, the higher the impact resistance (Experiment Nos. 1 to 20). , 21-25, 31-35),
Moreover, it is understood that the impact resistance is good when the mold temperature is in the temperature range of 20 ° C. lower than the thermal denaturation temperature of the inorganic filler-filled polypropylene material (Experiment Nos. 9 to 16 and 23 to 24, 33-34).
実施例２ 実施例１において、ポリプロピレンの代わりにポリスチ
レン（商品名：エスブライト、住友化学（株）製）を使
用した以外は、実施例１と同様にして第２表に示す結果
が得られた。Example 2 The results shown in Table 2 were obtained in the same manner as in Example 1 except that polystyrene (trade name: Esbright, manufactured by Sumitomo Chemical Co., Ltd.) was used in place of polypropylene. .
第２表から、ポリスチレンの場合もポリプロピレンと同
様の結果が得られることが理解される。 It can be seen from Table 2 that the same results can be obtained with polystyrene as with polypropylene.
（効果） 以上述べたように、熱可塑性樹脂の耐熱性などの熱的性
質を改良するため無機フィラーを多量に配合した無機フ
ィラー高充填熱可塑性樹脂材料を本発明の方法に従って
射出成形すると、熱的性質が改良され、また無機フィラ
ーを多量に含んでいるにもかかわらず耐衝撃性に優れた
熱可塑性樹脂成形体を得ることができる。従って、本発
明の方法は、耐衝撃性が要求される電気あるいは電子部
品、建材、自動車部材などの各種製品の製造方法として
最適なものということができる。(Effect) As described above, when an inorganic filler highly filled thermoplastic resin material containing a large amount of an inorganic filler for improving thermal properties such as heat resistance of a thermoplastic resin is injection-molded according to the method of the present invention, It is possible to obtain a thermoplastic resin molded product having improved impact resistance and excellent impact resistance in spite of containing a large amount of inorganic filler. Therefore, the method of the present invention can be said to be the most suitable as a method for manufacturing various products such as electric or electronic parts, building materials, automobile members, etc., which require impact resistance.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高田 勝巳 静岡県静岡市瀬名200―239 (56)参考文献 特開 昭58−134721（ＪＰ，Ａ) 特開 昭57−36655（ＪＰ，Ａ) 特開 昭51−144457（ＪＰ，Ａ) 特開 昭58−174444（ＪＰ，Ａ) 特開 昭56−123842（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsumi Takada 200-239 Sena, Shizuoka City, Shizuoka Prefecture (56) References JP 58-134721 (JP, A) JP 57-36655 (JP, A) Special Kai 51-144457 (JP, A) JP 58-174444 (JP, A) JP 56-123842 (JP, A)
Claims (1)
ラーを２００〜４００重量部配合した無機フィラー高充
填熱可塑性樹脂材料を射出成形するにあたり、射出成形
機の金型温度を上記樹脂材料の熱変形温度と該温度より
２０℃低い温度の範囲内の温度にすることを特徴とする
無機フィラー高充填熱可塑性樹脂成形体の製造方法。Claims: 1. When injection-molding a highly-filled inorganic filler thermoplastic resin material in which 200 to 400 parts by weight of an inorganic filler is mixed with 100 parts by weight of a thermoplastic resin, the mold temperature of an injection molding machine is set to A method for producing a thermoplastic resin molded article with a high filling of an inorganic filler, characterized in that the temperature is within a range of a deformation temperature and a temperature lower than the temperature by 20 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63086744A JPH06351B2 (en) | 1988-04-08 | 1988-04-08 | Inorganic filler Highly filled thermoplastic resin molding manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63086744A JPH06351B2 (en) | 1988-04-08 | 1988-04-08 | Inorganic filler Highly filled thermoplastic resin molding manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01258922A JPH01258922A (en) | 1989-10-16 |
| JPH06351B2 true JPH06351B2 (en) | 1994-01-05 |
Family
ID=13895299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63086744A Expired - Lifetime JPH06351B2 (en) | 1988-04-08 | 1988-04-08 | Inorganic filler Highly filled thermoplastic resin molding manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06351B2 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51144457A (en) * | 1975-06-06 | 1976-12-11 | Asahi Chemical Ind | Method of molding filler container polyamide resin |
| JPS5949901B2 (en) * | 1980-03-05 | 1984-12-05 | ライオン株式会社 | Injection molding method for filler-containing thermoplastic resin |
| JPS5736655A (en) * | 1980-08-15 | 1982-02-27 | Asahi Dow Ltd | SHARYOBUHIN |
| JPS58134721A (en) * | 1982-02-04 | 1983-08-11 | Aron Kasei Co Ltd | Thermoplastic resin molded product mixed with conductive filler |
| JPS58174444A (en) * | 1982-04-08 | 1983-10-13 | Nippon Oil Co Ltd | Porcelain-like hard material obtained by injection molding |
-
1988
- 1988-04-08 JP JP63086744A patent/JPH06351B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01258922A (en) | 1989-10-16 |
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