JP2624483B2 - Antistatic nylon molded product - Google Patents
Antistatic nylon molded productInfo
- Publication number
- JP2624483B2 JP2624483B2 JP62185118A JP18511887A JP2624483B2 JP 2624483 B2 JP2624483 B2 JP 2624483B2 JP 62185118 A JP62185118 A JP 62185118A JP 18511887 A JP18511887 A JP 18511887A JP 2624483 B2 JP2624483 B2 JP 2624483B2
- Authority
- JP
- Japan
- Prior art keywords
- monomer
- molded product
- molded article
- nylon molded
- carbon black
- 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
Landscapes
- Polyamides (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、帯電防止性に優れたモノマーキヤストナイ
ロン成形品に関する。Description: TECHNICAL FIELD The present invention relates to a monomer cast nylon molded article having excellent antistatic properties.
（従来技術のその課題） モノマーキヤストナイロン成形品は、ε−カプロラク
タム等の原料モノマーを成形型内で重合することにより
得られる。(Problems of the Prior Art) A monomer cast nylon molded product is obtained by polymerizing a raw material monomer such as ε-caprolactam in a molding die.
このモノマーキヤストナイロンの成形品は、機械的性
質が優れているので歯車、車輪、ロール、スクリュー等
各種機械部品に用いられる。This molded product of monomer cast nylon has excellent mechanical properties and is used for various mechanical parts such as gears, wheels, rolls and screws.
ところがモノマーキヤストナイロンは電気絶縁性（体
積固有抵抗は1014〜1015Ω−cm）であるため、静電気を
嫌う用途においては、帯電防止性を付与することが望ま
れる。However, monomer-cast nylon is electrically insulating (having a volume resistivity of 10 14 to 10 15 Ω-cm), and thus it is desired to impart an antistatic property to applications that dislike static electricity.
モノマーキヤストナイロンに帯電防止性を付与するに
は、原料モノマーに金属微粉末、金属繊維、カーボンブ
ラック、金属を被覆した無機質粒子などを添加すること
が考えられる。In order to impart antistatic properties to the monomer cast nylon, it is conceivable to add metal fine powder, metal fiber, carbon black, metal-coated inorganic particles, or the like to the raw material monomer.
ところがこれらの添加物のうち金属系のものは、通常
モノマーキヤスト法に用いられる静置法の場合には、型
内で沈降して均一に分散しないという問題がある。また
カーボンブラックはその比表面積が大きいため、モノマ
ーを吸着してペースト状になり、せいぜい５重量％程度
した添加できない。そのため体積固有抵抗も1010〜1011
Ω−cm程度しか低下しないし、機械的性質を損なう傾向
もある。However, among these additives, metal-based additives have a problem that they do not settle and disperse uniformly in a mold in the case of a stationary method usually used in a monomer casting method. Further, since carbon black has a large specific surface area, it adsorbs a monomer to form a paste, and cannot be added at most about 5% by weight. Therefore, the volume resistivity is also 10 10 to 10 11
It decreases only by about Ω-cm, and tends to impair the mechanical properties.
（課題を解決するための手段） 本発明は、カーボンブラックにかえて、比重1.4〜1.6
の球状ないし粒状炭素微粒子をモノマー原料に添加して
重合することにより、炭素粒子を成形品中に均一に分散
させたモノマーキヤストナイロン成形品である。(Means for Solving the Problems) The present invention uses a specific gravity of 1.4 to 1.6 instead of carbon black.
This is a monomer cast nylon molded article in which carbon particles are uniformly dispersed in the molded article by adding the spherical or granular carbon fine particles to a monomer raw material and polymerizing.
以下本発明を具体的に説明する。 Hereinafter, the present invention will be described specifically.
本発明は、モノマーキヤストナイロンを主体とし、こ
れに特定の炭素微粒子を分散させた成形品である。The present invention is a molded article mainly composed of monomer cast nylon, in which specific carbon fine particles are dispersed.
モノマーキヤストナイロンとしては、ε−カプロラク
タムを原料とする６−ナイロンやω−ラウリロラクタム
を原料とする12−ナイロン等がある。Examples of the monomer cast nylon include 6-nylon made from ε-caprolactam and 12-nylon made from ω-lauryl lactam.
これに添加する炭素微粒子は、比重が1.4〜1.6の球状
ないし粒状のものである。平均粒径は例えば10〜25μ程
度とすることができる。The carbon fine particles to be added are spherical or granular having a specific gravity of 1.4 to 1.6. The average particle size can be, for example, about 10 to 25 μm.
このような粒子としては、ベルパール−Ｃ（鐘紡株式
会社製）がある。これは球状ないし粒状のフェノール・
ホルムアルデヒド樹脂を炭化焼成した等方性カーボン粒
子とされている。Such particles include Bellpearl-C (manufactured by Kanebo Co., Ltd.). This is a spherical or granular phenol
It is an isotropic carbon particle obtained by carbonizing and firing formaldehyde resin.
カーボンブラックは、極めて微細な不定形の微粉末で
あり、比表面積が通常200m2/g以上というように大きい
ためモノマー吸着量が大きいが、この粒子は、比表面積
が10cm2/gあるいはそれ以下と小さいため、モノマーを
あまり吸着せず、多量に添加することができる。Carbon black is an extremely fine amorphous fine powder, and the specific surface area is usually as large as 200 m 2 / g or more, so the amount of monomer adsorption is large, but this particle has a specific surface area of 10 cm 2 / g or less. Therefore, the monomer can be added in a large amount without adsorbing the monomer much.
また比重が1.4〜1.6でε−カプロラクタムなどのモノ
マー原料の比重（1.0弱）との差が小さいので、金属系
粒子のように沈降せずに、均一に分散させることができ
る。Further, since the specific gravity is 1.4 to 1.6 and the difference from the specific gravity of the monomer material such as ε-caprolactam (slightly less than 1.0) is small, it can be uniformly dispersed without sedimentation unlike metal-based particles.
また平均粒径が数μｍ以上、例えば10〜25μｍとカー
ボンブラックよりも格段に大きいため、凝集することな
くモノマー中に均一に分散させることができる。Further, since the average particle size is several μm or more, for example, 10 to 25 μm, which is much larger than carbon black, it can be uniformly dispersed in the monomer without aggregation.
上記粒子の添加量は、２〜40重量％の範囲とし、特に
好ましくは５重量％以上とする。The amount of the particles added is in the range of 2 to 40% by weight, particularly preferably 5% by weight or more.
本発明成形品を得るには、ε−カプロラクタムなどの
モノマーに、アルカリ金属、アルカリ土類金属、これら
の金属の水素化物などのアニオン重合触媒、イソシアネ
ート化合物、カルボジイミド、Ｎ−置換エチレンイミン
誘導体などの重合開始剤、および前記炭素微粒子を添加
混合し、その混合物を成形型内に注入して120〜200℃程
度の温度で重合させることにより得られる。In order to obtain the molded article of the present invention, monomers such as ε-caprolactam, alkali metals, alkaline earth metals, anionic polymerization catalysts such as hydrides of these metals, isocyanate compounds, carbodiimides, N-substituted ethyleneimine derivatives and the like It is obtained by adding and mixing a polymerization initiator and the carbon fine particles, injecting the mixture into a mold, and performing polymerization at a temperature of about 120 to 200 ° C.
（実施例） ステンレスビーカーに無水のε−カプロラクタム2000
gをとり、140〜160℃に調整する。これに重合開始剤ト
リレンジイソシアネート15gおよび予め加熱しておいた
炭素微粒子（ベルパール−C2000S）を所定量添加し混合
する。一方別のビーカーに、無水のε−カプロラクタム
1000gをとり、これに重合触媒の水素化ナトリウム（油
性63％）6gを加え、140〜160℃に調整する。(Example) Anhydrous ε-caprolactam 2000 was placed in a stainless beaker.
Take g and adjust to 140-160 ° C. To this, 15 g of a polymerization initiator tolylene diisocyanate and a predetermined amount of pre-heated carbon fine particles (Bellpearl-C2000S) are added and mixed. Meanwhile, in another beaker, anhydrous ε-caprolactam
Take 1000 g, add 6 g of sodium hydride (63% oily) as a polymerization catalyst, and adjust to 140-160 ° C.
そして両者を混合して、150℃の成形型内に注入し、1
0分間重合させてから取り出した。成形品は、厚さ15m
m、幅300mm、長さ400mmの板である。この板を長さ方向
（成形型の高さ方向）に３等分し、上部、中部および下
部から所定寸法の試験片を切り出して、次の特性を評価
した。その結果を第１表に示す。Then, they are mixed and poured into a mold at 150 ° C.
After polymerization for 0 minutes, it was removed. Molded product is 15m thick
m, 300mm wide and 400mm long. This plate was divided into three equal parts in the length direction (the height direction of the mold), and test pieces having predetermined dimensions were cut out from the upper, middle and lower parts, and the following characteristics were evaluated. Table 1 shows the results.
（１）体積固有抵抗（Ω−cm） 100mm角で厚さ5mmの試験片について、試料箱として16
008A RESISTIVITY CELLを用い、抵抗値106Ω−cm以上
についてはハイレジスタンスメータ4329A、106Ω−cm以
下についてはデイジタルマルチメータ3478A（いずれも
横河ヒュレット・パッカード社製）により測定した。(1) Volume resistivity (Ω-cm) For a test piece of 100 mm square and 5 mm thickness, 16
008A using RESISTIVITY CELL, the resistance 10 6 Ω-cm or more was measured by high resistance meter 4329A, 10 6 Ω-cm digital multimeter 3478A is the following (all manufactured by Yokogawa Hewlett-Packard).
（２）曲げ特性 ASTM−D790に基づいて、インストロン型万能試験機
で、曲げ強度（kg/cm2）および曲げ弾性率（kg/cm2）を
測定した。(2) Flexural properties Based on ASTM-D790, flexural strength (kg / cm 2 ) and flexural modulus (kg / cm 2 ) were measured with an Instron universal testing machine.
（比較例） ベルパール−C2000Sにかえて、カーボンブラックまた
はニッケル被覆マイカを用いて、実施例１と同様にして
成形品を得た。その特性評価結果を第１表に併記する。(Comparative Example) A molded product was obtained in the same manner as in Example 1, except that carbon black or nickel-coated mica was used instead of Bellpearl-C2000S. The characteristics evaluation results are also shown in Table 1.
第１表中、 ＡはベルパールＣ−2000S Ｂはカーボンブラック（ケッチェンブラックEC） Ｃはニッケル被覆マイカ を示す。 In Table 1, A is Bellpearl C-2000S B is carbon black (Ketjen Black EC) C is nickel-coated mica.
第１表から明らかなように、本発明成形品（No.2〜1
0）のうち、No.2はカーボンブラック添加品（No.11〜1
2）と体積固有抵抗は同等であるが、曲げ特性において
優れている。As is clear from Table 1, the molded article of the present invention (No.
No. 2 among the carbon black-added products (No. 11 to 1)
Although the volume resistivity is the same as 2), it is excellent in bending characteristics.
また５％以上添加したNo.3〜10は、カーボンブラック
では得られない108以下の体積固有抵抗が得られる。Nos. 3 to 10 added at 5% or more have a volume resistivity of 10 8 or less, which cannot be obtained with carbon black.
また本発明成形品は、炭素微粒子が成形品中に均一に
分散するので、ニッケル被覆マイカ添加品（No.13〜1
5）に比べ、位置による特性のばらつきが少ない。Further, in the molded article of the present invention, since the carbon fine particles are uniformly dispersed in the molded article, the nickel-coated mica-added product (No. 13 to 1)
Compared to 5), there is less variation in characteristics depending on the position.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭50−82199（ＪＰ，Ａ) 特開 昭62−91528（ＪＰ，Ａ) 特開 昭60−243117（ＪＰ，Ａ) 特開 昭59−22922（ＪＰ，Ａ) 特開 昭48−72298（ＪＰ，Ａ) 特公 昭47−23429（ＪＰ，Ｂ１) ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-50-82199 (JP, A) JP-A-62-91528 (JP, A) JP-A-60-243117 (JP, A) JP-A-59-1982 22922 (JP, A) JP-A-48-72298 (JP, A) JP-B-47-23429 (JP, B1)
Claims (1)
を２〜40重量％含有してなる帯電防止性モノマーキヤス
トナイロン成形品。1. An antistatic monomer cast nylon molded article containing 2 to 40% by weight of spherical or granular carbon fine particles having a specific gravity of 1.4 to 1.6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62185118A JP2624483B2 (en) | 1987-07-24 | 1987-07-24 | Antistatic nylon molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62185118A JP2624483B2 (en) | 1987-07-24 | 1987-07-24 | Antistatic nylon molded product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6429428A JPS6429428A (en) | 1989-01-31 |
| JP2624483B2 true JP2624483B2 (en) | 1997-06-25 |
Family
ID=16165180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62185118A Expired - Fee Related JP2624483B2 (en) | 1987-07-24 | 1987-07-24 | Antistatic nylon molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2624483B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100795171B1 (en) | 2007-04-10 | 2008-01-16 | 주식회사 에스앤엠 | Manufacturing methods of conductine mc nylon and conductine mc nylon thereof |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5084504A (en) * | 1990-01-30 | 1992-01-28 | Nippon Polypenco Limited | Process for producing an antistatic molded article of monomer-cast nylon |
| US5179155A (en) * | 1990-01-30 | 1993-01-12 | Nippon Polypenco Limited | Antistatic molded article of monomer-cast nylon |
| JP5216187B2 (en) * | 2005-08-04 | 2013-06-19 | クオドラントポリペンコジャパン株式会社 | Antistatic polyamide resin molded body with improved heat resistance |
| EP2966111A4 (en) * | 2013-03-08 | 2016-10-26 | Nagase Chemtex Corp | Method for manufacturing nylon 6 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5236556B2 (en) * | 1973-11-20 | 1977-09-16 |
-
1987
- 1987-07-24 JP JP62185118A patent/JP2624483B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100795171B1 (en) | 2007-04-10 | 2008-01-16 | 주식회사 에스앤엠 | Manufacturing methods of conductine mc nylon and conductine mc nylon thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6429428A (en) | 1989-01-31 |
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Legal Events
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| R250 | Receipt of annual fees |
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| R250 | Receipt of annual fees |
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