JPH061892A - Polypropylene for injection molding - Google Patents
Polypropylene for injection moldingInfo
- Publication number
- JPH061892A JPH061892A JP15936692A JP15936692A JPH061892A JP H061892 A JPH061892 A JP H061892A JP 15936692 A JP15936692 A JP 15936692A JP 15936692 A JP15936692 A JP 15936692A JP H061892 A JPH061892 A JP H061892A
- Authority
- JP
- Japan
- Prior art keywords
- polypropylene
- impact strength
- injection
- molded article
- temp
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、衝撃強度および耐熱剛
性の優れた射出成形物を得ることのできる射出成形用ポ
リプロピレンに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection-molded polypropylene capable of obtaining an injection-molded article excellent in impact strength and heat resistance rigidity.
【０００２】[0002]
【従来の技術】従来、ポリプロピレン射出成形物の衝撃
強度を改良する方法としては、例えばエチレンやブテン
−１などを共重合したポリプロピレンあるいはゴム状物
質を混合したポリプロピレンを原料として使用する方法
が知られている。2. Description of the Related Art Heretofore, as a method for improving the impact strength of a polypropylene injection-molded article, there is known a method of using, as a raw material, polypropylene obtained by copolymerizing ethylene, butene-1 or the like or polypropylene mixed with a rubber-like substance. ing.
【０００３】一方、ポリプロピレン射出成形物の耐熱剛
性を改良する方法としては、例えばタルクや炭酸カルシ
ウムなどの微粉末粒子を充填したポリプロピレンを原料
として用いる方法が知られている。On the other hand, as a method for improving the heat resistance and rigidity of a polypropylene injection-molded article, there is known a method using polypropylene filled with fine powder particles such as talc and calcium carbonate as a raw material.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記し
たような共重合あるいはゴム状物質を混合したポリプロ
ピレンを用いて成形した射出成形物は、衝撃強度は改良
されるが、反面で耐熱剛性が低下するという欠点を有し
ている。また微粉末粒子を充填したポリプロピレンを用
いて成形した射出成形物は、耐熱剛性は改良されるが、
反面で衝撃強度が低下するという欠点がある。However, the injection-molded article molded by using the above-mentioned copolymer or polypropylene mixed with a rubber-like substance has an improved impact strength, but on the other hand, a reduced heat-resistant rigidity. It has the drawback of Also, the injection-molded product molded using polypropylene filled with fine powder particles has improved heat resistance rigidity,
On the other hand, there is a drawback that the impact strength is reduced.
【０００５】このように、単一の手段で衝撃強度と耐熱
剛性が共に優れたポリプロピレン射出成形物を得ること
は、従来の方法では困難であった。As described above, it has been difficult to obtain a polypropylene injection-molded article excellent in both impact strength and heat resistance by a single method by the conventional method.
【０００６】[0006]
【問題を解決するための手段】本発明者は、簡単な手段
でポリプロピレン射出成形物の衝撃強度を改良する方法
について鋭意研究を重ねた結果、γ−キナクリドンを特
定量添加したポリプロピレンを射出成形することによ
り、衝撃強度をと耐熱剛性を兼ね備えたポリプロピレン
射出成形物が得られることを見出し、本発明を完成する
に至った。即ち、本発明は、γ−キナクリドンを２０〜
１，０００ｐｐｍ含有する射出成形用ポリプロピレンで
ある。As a result of earnest studies on a method for improving the impact strength of a polypropylene injection-molded product by a simple means, the present inventor injection-molds polypropylene to which a specific amount of γ-quinacridone is added. As a result, they have found that a polypropylene injection-molded product having both impact strength and heat resistance can be obtained, and have completed the present invention. That is, the present invention provides γ-quinacridone in an amount of 20-
It is a polypropylene for injection molding containing 1,000 ppm.
【０００７】本発明にいうポリプロピレンは、メルトフ
ローインデックスが一般に０．５〜３０ｇ／１０分のホ
モポリプロピレンまたはエチレン、ブテン−１などの他
のモノマ−とのランダム共重合ポリプロピレンを意味す
るものであり、特にホモポリプロピレンが好ましく使用
できる。ポリプロピレン以外のポリマー、充填剤、結晶
核剤、酸化防止剤、熱安定剤、滑剤、難燃剤、帯電防止
剤、顔料、その他の添加剤を必要に応じて、本発明の効
果を著しく損わない範囲で含有していてもよい。本発明
のポリプロピレンにおけるγ−キナクリドンの含量は、
２０〜１，０００ｐｐｍ特に５０〜５００ｐｐｍが好ま
しい。このγ−キナキリドン含量が２０ｐｐｍ未満の場
合には衝撃強度および耐熱剛性改良効果が小さく、また
１，０００ｐｐｍを超えた場合には、衝撃強度の改良効
果が低下し、赤色着色が強くなり、さらにコスト高とも
なるため好ましくない。The polypropylene referred to in the present invention means homopolypropylene having a melt flow index of generally 0.5 to 30 g / 10 min or random copolymerized polypropylene with other monomers such as ethylene and butene-1. Especially, homopolypropylene can be preferably used. Polymers other than polypropylene, fillers, crystal nucleating agents, antioxidants, heat stabilizers, lubricants, flame retardants, antistatic agents, pigments, and other additives, if necessary, do not significantly impair the effects of the present invention. You may contain in the range. The content of γ-quinacridone in the polypropylene of the present invention is
20 to 1,000 ppm, particularly 50 to 500 ppm is preferable. When the content of γ-quinakiridone is less than 20 ppm, the effect of improving the impact strength and heat resistance is small, and when it exceeds 1,000 ppm, the effect of improving the impact strength is reduced and the red coloring becomes strong, and the cost is further reduced. It is also unfavorable because it becomes high.
【０００８】また、本発明のポリプロピレンにおけるγ
−キナクリドンの含有は、任意の混合方法で行うことで
かできる。例えば、ポリプロピレン粉末またはペレット
と所定量のγ−キナクリドンをダンブラー、ヘンシェル
ミキサーなどで混合する。この混合物をスクリュー押出
材やロールなどで混練することもできる。Further, γ in the polypropylene of the present invention
The inclusion of quinacridone can be done by any mixing method. For example, polypropylene powder or pellets and a predetermined amount of γ-quinacridone are mixed with a tumbler, a Henschel mixer, or the like. This mixture can also be kneaded with a screw extruded material or a roll.
【０００９】本発明のγ−キナクリドンを含有するポリ
プロピレンによる射出成形は、通常のスクリューインラ
イン式またはプランジャー式射出成形材を用いて、ポリ
プロピレンを成形する成形条件下で行うことができる。
例えば低圧射出成形、射出圧縮成形、ガス注入射出成
形、射出ブロー成形、プッシュプル射出成形、ロストコ
ア射出成形、２シエル法射出成形などでの特殊射出成形
法で行うこともできる。The injection molding of the polypropylene containing γ-quinacridone of the present invention can be carried out under the molding conditions for molding polypropylene using a usual screw in-line type or plunger type injection molding material.
For example, special injection molding methods such as low-pressure injection molding, injection compression molding, gas injection injection molding, injection blow molding, push-pull injection molding, lost core injection molding, and two-shell injection molding can be used.
【００１０】[0010]
【発明の効果】上記した、本発明のポリプロピレンを用
いることにより、衝撃強度および耐熱剛性の優れたポリ
プロピレン射出成形物を得ることができる。EFFECT OF THE INVENTION By using the above-mentioned polypropylene of the present invention, a polypropylene injection-molded article having excellent impact strength and heat resistance can be obtained.
【００１１】[0011]
【実施例】以下に本発明を実施例を示すが、本発明はこ
れに制限されるものでない。EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited thereto.
【００１２】実施例１ 徳山曹達（株）製のホモアイソタクチックポリプロピレ
ン粉末（ＰＮ１３０）にγ−キナクリドンをそれぞれ
０，１０，３０，５０，１００，３００，１０００，お
よび１０，０００ｐｐｍ混合し、４０ｍｍφスクリュー
押出材で２４０℃で溶融混練ペレタイズを行った。得ら
れたペレットから、スクリューインライン式射出成形材
を用い、シリンダー温度２４０℃、金型温度４０℃、射
出速度１３．５ｃｃ／秒、射出圧力５００ｋｇ／ｃ
ｍ2、射出時間３０秒および冷却時間１０秒の条件でＡ
ＳＴＭ曲げ試験片およびノツチ付アイゾット衝撃試験片
を射出成形した。Example 1 Homoisotactic polypropylene powder (PN130) manufactured by Tokuyama Soda Co., Ltd. was mixed with 0, 10, 30, 50, 100, 300, 1000, and 10,000 ppm of γ-quinacridone, respectively, and 40 mmφ Melt kneading pelletization was performed at 240 ° C. with a screw extruded material. From the obtained pellets, using a screw in-line type injection molding material, cylinder temperature 240 ° C., mold temperature 40 ° C., injection speed 13.5 cc / sec, injection pressure 500 kg / c
m 2 under conditions of injection time 30 seconds and cooling time 10 seconds A
STM bending test pieces and notched Izod impact test pieces were injection molded.
【００１３】表１に２３℃で測定したアイゾット衝撃強
度、曲げ弾性率および熱変形温度を示す。Table 1 shows Izod impact strength, flexural modulus and heat distortion temperature measured at 23 ° C.
【００１４】[0014]
【表１】 [Table 1]
【００１５】以上より、γ−キナクリドンを２０〜１，
０００ｐｐｍ含有するポリプロピレンから射出成形され
た成形物は衝撃強度および耐熱剛性ともに優れているこ
とがわかる。From the above, 20-1 of γ-quinacridone was added.
It can be seen that the molded product injection-molded from polypropylene containing 000 ppm has excellent impact strength and heat resistance.
Claims (1)
ｐｍ含有する射出成形用ポリプロピレン。1. Gamma-quinacridone in an amount of 20 to 1,000 p
Polypropylene for injection molding containing pm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15936692A JP3240581B2 (en) | 1992-06-18 | 1992-06-18 | Injection molding polypropylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15936692A JP3240581B2 (en) | 1992-06-18 | 1992-06-18 | Injection molding polypropylene |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH061892A true JPH061892A (en) | 1994-01-11 |
| JP3240581B2 JP3240581B2 (en) | 2001-12-17 |
Family
ID=15692272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15936692A Expired - Fee Related JP3240581B2 (en) | 1992-06-18 | 1992-06-18 | Injection molding polypropylene |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3240581B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7652092B2 (en) * | 2002-08-12 | 2010-01-26 | Exxonmobil Chemical Patents Inc. | Articles from plasticized thermoplastic polyolefin compositions |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015079231A (en) | 2013-09-03 | 2015-04-23 | 株式会社リコー | Drive apparatus and image forming apparatus |
-
1992
- 1992-06-18 JP JP15936692A patent/JP3240581B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7652092B2 (en) * | 2002-08-12 | 2010-01-26 | Exxonmobil Chemical Patents Inc. | Articles from plasticized thermoplastic polyolefin compositions |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3240581B2 (en) | 2001-12-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| LAPS | Cancellation because of no payment of annual fees |