JPH0655835B2 - Method for manufacturing thermoplastic resin molding - Google Patents
Method for manufacturing thermoplastic resin moldingInfo
- Publication number
- JPH0655835B2 JPH0655835B2 JP63154953A JP15495388A JPH0655835B2 JP H0655835 B2 JPH0655835 B2 JP H0655835B2 JP 63154953 A JP63154953 A JP 63154953A JP 15495388 A JP15495388 A JP 15495388A JP H0655835 B2 JPH0655835 B2 JP H0655835B2
- Authority
- JP
- Japan
- Prior art keywords
- thermoplastic resin
- tetrafluoropolyethylene
- mixed
- extruder
- dispersion liquid
- 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
- Processes Of Treating Macromolecular Substances (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】 <利用分野> 本発明は四フッ化ポリエチレンを分散させた熱可塑性樹
脂成形物の製造法に関する。更に、詳しくは、フィブリ
ル形成能を有する四フッ化ポリエチレンを均一に分散さ
せた熱可塑性樹脂成形物の製造法に関する。DETAILED DESCRIPTION OF THE INVENTION <Field of Use> The present invention relates to a method for producing a thermoplastic resin molded product in which tetrafluoropolyethylene is dispersed. More specifically, it relates to a method for producing a thermoplastic resin molded product in which tetrafluoropolyethylene having a fibril forming ability is uniformly dispersed.
<従来技術> 従来より、熱可塑性樹脂に耐摩擦摩耗性を付与するため
に四フッ化ポリエチレン粉末を混合することは知られて
いるが、四フッ化ポリエチレン粉末は、極めて凝集し易
いため、熱可塑性樹脂に混合する四フッ化ポリエチレン
粉末としては、予め焼成してフィブリル形成能を失わせ
て凝集し難くしたものが使用されている。<Prior Art> It has been conventionally known to mix a tetrafluoropolyethylene powder with a thermoplastic resin in order to impart abrasion resistance to the thermoplastic resin. As the polyethylene tetrafluoride powder to be mixed with the plastic resin, there has been used one which has been previously fired so as to lose its ability to form fibrils and to be hard to aggregate.
一方、本発明者はポリカーボネート樹脂の燃焼試験にお
いて、燃焼滴下物を抑制するために、難燃剤と共に四フ
ッ化ポリエチレンを混合することを試みた。しかしなが
ら、通常使用されている予め焼成して凝集性を失わせた
四フッ化ポリエチレンを使用したのでは、燃焼滴下物を
抑制する効果が得られないのに対し、フィブリル形成能
を有する四フッ化ポリエチレンは好ましい効果が得られ
ることを知った。On the other hand, the present inventor tried to mix tetrafluoroethylene with a flame retardant in order to suppress combustion dripping in a polycarbonate resin combustion test. However, the use of a commonly used tetrafluoropolyethylene that has been pre-calcined to lose its cohesiveness does not provide the effect of suppressing combustion drips, whereas tetrafluoride having fibril-forming ability is used. We have found that polyethylene has the desired effect.
しかしながら、フィブリル形成能を有する四フッ化ポリ
エチレン粉末を、通常行なわれているドライブレンド法
で混合したのでは、混合の際に生ずる粉体間の摩擦によ
って四フッ化ポリエチレン粉末は直ちに凝集し、これを
成形して得られる成形物の表面は極めて粗になり、商品
価値の乏しいものになる。However, when the tetrafluoride polyethylene powder having the ability to form fibrils is mixed by the dry blending method which is usually performed, the tetrafluoride polyethylene powder is immediately aggregated due to the friction between the powders generated during the mixing, and The surface of the molded product obtained by molding is extremely rough, and the commercial value is poor.
更に四フッ化ポリエチレン粉末をフッ素ゴム、シリコー
ン系高分子、NBR、ブチルゴム、ポリイミド樹脂等に
含有させるために、四フッ化ポリエチレン粉末を分散液
にし、これを10℃以下、具体的には5℃に冷却して上記
樹脂の分散液又は溶液の添加する方法が知られている
(特開昭63−101430号公報)。しかしながら、このよう
に四フッ化ポリエチレンの分散液を5℃にも冷却するに
は、特別の装置を要し、作業の繁雑化及びコストの上昇
を招き、好ましい方法ではない。Further, in order to add the tetrafluoropolyethylene powder to fluororubber, silicone polymer, NBR, butyl rubber, polyimide resin, etc., the tetrafluoropolyethylene powder is made into a dispersion liquid, which is 10 ° C or less, specifically 5 ° C. There is known a method in which the dispersion liquid or the solution of the above resin is cooled and then added (JP-A-63-101430). However, in order to cool the dispersion liquid of polyethylene tetrafluoride to 5 ° C. as described above, a special device is required, which causes complicated work and an increase in cost, which is not a preferable method.
<発明の目的> 本発明の目的は、特別の装置を必要とせず、フィブリル
形成能を有する四フッ化ポリエチレンを均一に分散含有
するポリカーボネート樹脂成形物を提供するにある。<Object of the Invention> An object of the present invention is to provide a polycarbonate resin molded product which does not require a special device and uniformly contains tetrafluoropolyethylene having fibril forming ability.
本発明者は上記目的を達成せんとして鋭意検討し、ポリ
カーボネート樹脂を押出成型する際に、四フッ化ポリエ
チレンの分散液を連続的に供給して押出機内において混
合分散させれば、四フッ化ポリエチレンの分散液を特に
冷却しなくても極めて分散性よく混合できることを知っ
た。この知見に基づいて更に検討を重ねた結果、本発明
を完成したものである。The present inventor has made earnest studies for achieving the above object, and when a polycarbonate resin is extrusion-molded, if a dispersion liquid of polyethylene tetrafluoride is continuously supplied and mixed and dispersed in an extruder, the polyethylene tetrafluoride is obtained. It has been found that the dispersion liquid can be mixed with extremely good dispersibility without being particularly cooled. As a result of further studies based on this finding, the present invention has been completed.
<発明の構成> 即ち、本発明はフィブリル形成能を有する四フッ化ポリ
チレンを分散せしめた熱可塑性樹脂成形物を押出機を用
いて製造するに当り、該四フッ化ポリエチレンを分散液
ととなし、これを熱可塑性樹脂に混合することなく連続
的に供給して押出機内において混合分散せしめることを
特徴とする熱可塑性樹脂成形物の製造法である。<Structure of the Invention> That is, in the present invention, when a thermoplastic resin molded product in which tetrafluoropolyethylene having a fibril forming ability is dispersed is manufactured using an extruder, the tetrafluoropolyethylene is used as a dispersion liquid. A method for producing a thermoplastic resin molded article is characterized in that the thermoplastic resin molded article is continuously supplied without being mixed with a thermoplastic resin and mixed and dispersed in an extruder.
本発明で使用する四フッ化ポリエチレンはフィブリル形
成能を有するものであり、その分散液を形成する分散媒
としては、添加される熱可塑性樹脂に実質的に悪影響を
与えないものであれば任意に使用でき、熱可塑性樹脂が
ポリカーボネートのときは水が好ましく使用される。分
散液の濃度は、分散状態が安定する濃度であればよい
が、あまり薄いと分散媒によるトラブルが生じることが
あるので、5重量%以上が好ましく、5〜60重量%の範
囲が特に好ましい。The tetrafluoropolyethylene used in the present invention has a fibril forming ability, and the dispersion medium for forming the dispersion liquid may be any as long as it does not substantially adversely affect the thermoplastic resin to be added. Water can be used, and water is preferably used when the thermoplastic resin is polycarbonate. The concentration of the dispersion liquid may be such that the dispersion state is stable, but if it is too thin, problems due to the dispersion medium may occur, so 5% by weight or more is preferable, and a range of 5-60% by weight is particularly preferable.
本発明で対象とする熱可塑性樹脂は押出成形可能な熱可
塑性樹脂あれば特に制限されず、例えばポリ塩化ビニ
ル、ポリエチレン、ポリプロピレン、ポリメチルメタク
リレート、ポリスチレン、アクリロニトリル・スチレン
ポリマー、アクリロニトリル・ブタジエン・スチレンポ
リマー等の汎用樹脂をはじめポリカーボネート、4−メ
チルペンテン−1、ポリアミド、ポリエステル、ポリフ
ェニレンエーテル、ポリメチレンエーテル等の汎用エン
ジニアリング樹脂及びその他の熱可塑性樹脂があげら
れ、特にポリカーボネートが好ましい。ポリカーボネー
トは二価の芳香族フエノール類を用いて溶剤法、溶融法
により製造される芳香族ポリカーボネートが好ましい。The thermoplastic resin targeted by the present invention is not particularly limited as long as it is an extrudable thermoplastic resin, and examples thereof include polyvinyl chloride, polyethylene, polypropylene, polymethylmethacrylate, polystyrene, acrylonitrile-styrene polymer, acrylonitrile-butadiene-styrene polymer. General-purpose resins such as polycarbonate, 4-methylpentene-1, polyamide, polyester, polyphenylene ether, polymethylene ether, and other general-purpose engineering resins, and other thermoplastic resins, and polycarbonate is particularly preferable. The polycarbonate is preferably an aromatic polycarbonate produced by a solvent method or a melting method using a divalent aromatic phenol.
本発明にあっては熱可塑性樹脂を押出機によりペレット
はその他の成形物に成形するに当たって、上記四フッ化
ポリエチレンの分散液を供給しつつ成形する。ここで使
用用する押出機としては、特別の押出機である必要はな
く、単軸又2軸の押出機のいずれでもよいが、食込み
性、混練性の点から2軸の押出機が好ましく、また分散
媒の除去、揮発成分の除去等を考離すると、ベント付の
ものが好ましい。開放、減圧のいずれも採用される。In the present invention, when the thermoplastic resin is extruded into pellets by using an extruder, the pellets are extruded while supplying the dispersion liquid of tetrafluoropolyethylene. The extruder used here does not have to be a special extruder and may be a single-screw or twin-screw extruder, but a twin-screw extruder is preferable from the viewpoint of biting property and kneading property. Further, in consideration of removal of the dispersion medium, removal of volatile components, etc., a vent is preferable. Both open and reduced pressure are adopted.
上記分散液の供給は、押出機のホッパー部、特にその底
部、押出機にベント、特に複数のベントが設けられてい
るときは最初のベント部に定量的に滴下、流下又は圧入
される。定量供給機としては、例えばプランジャーポン
プ、ギヤーポンプ、チューブポンプ、圧入ポンプ、電磁
定量ポンプ、ダイヤフラムポンプ、マグネットポンプ等
任意に使用できる。The supply of the above dispersion liquid is quantitatively dropped, flowed or pressed into the hopper portion of the extruder, especially the bottom portion thereof, and the vent, particularly the first vent portion when a plurality of vents are provided in the extruder. As the constant quantity feeder, for example, a plunger pump, a gear pump, a tube pump, a press-fitting pump, an electromagnetic constant quantity pump, a diaphragm pump, a magnet pump and the like can be arbitrarily used.
供給量は、その目的によって広い範囲をとることができ
る。The supply amount can take a wide range depending on the purpose.
ポリカーボネートの燃焼滴下物を抑制するために、難燃
剤と共に上記四フッ化ポリエチレンを混合するときは、
0.1〜5重量%程度であり、この場合でもマスターペレ
ットにするときは〜20重量%程度まで加えることもあ
る。In order to suppress combustion dripping of polycarbonate, when mixing the above tetrafluoride polyethylene with a flame retardant,
It is about 0.1 to 5% by weight, and even in this case, up to about 20% by weight may be added when forming a master pellet.
本発明を実施する際し、必要に応じて添加剤、例えば顔
料、染料、UV安定剤、熱安定剤、離型剤、難燃焼、そ
の他の充填剤等を混合することができる。かかる添加剤
や充填剤を使用する場合も、フィブリル形成能を有する
四フッ化ポリエチレンの分散液は、添加剤や充填剤と予
め混合することなく供給して押出機内において混合す
る。In carrying out the present invention, additives such as pigments, dyes, UV stabilizers, heat stabilizers, mold release agents, flame retardants, and other fillers can be mixed if necessary. Even when such additives or fillers are used, the dispersion liquid of tetrafluoropolyethylene having a fibril forming ability is supplied without being mixed with the additives or fillers in advance and mixed in the extruder.
<発明の効果> 本発明によれば、特別の装置を必要とせず、フィブリル
形成能を有する四フッ化ポリエチレンを均一に分散含有
する熱可塑性樹脂成形物を提供することができ、また本
発明に従って一旦ペレットを成形し、これを用いて成形
物を製造すれば、任意の成形法によってフィブリル形成
能を有する四フッ化ポリエチレンを均一に分散含有する
熱可塑性樹脂成形物、特に外観の優れた成形物を提供す
ることができる。<Effects of the Invention> According to the present invention, it is possible to provide a thermoplastic resin molded product that does not require a special device and uniformly contains tetrafluoropolyethylene having fibril forming ability, and according to the present invention. Once a pellet is molded and a molded product is produced using this, a thermoplastic resin molded product containing, in particular, tetrafluoropolyethylene having fibril-forming ability uniformly dispersed by any molding method, particularly a molded product having an excellent appearance. Can be provided.
<実施例> 以下実施例により本発明を詳述する。成形物の外観90mm
×50mm×2mmの見本板を射出成形し、100倍の顕微鏡写
真により判定し、難燃性は1.27mm×12.7mm×1.59mmの試
験片を5本射出成形し、UL−94に準じて評価した。<Examples> The present invention will be described in detail below with reference to Examples. Appearance of molded product 90mm
Injection molding a sample plate of 50 mm x 2 mm x 100 mm, and judging by a 100x micrograph, flame retardancy was injection molded with 5 test pieces of 1.27 mm x 12.7 mm x 1.59 mm and evaluated according to UL-94. did.
実施例1 粘度平均重合度22000のポリカーボネート粉体5000重量
部にカーボンブラック10重量部を混合し、130℃で5時
間乾燥したものをテーブルフィーダーにて5kg/時間の
供給量で、一方フィブリル形成能を有する四フッ化ポリ
エチレンを60重量%含有する水性分散液(ダイキン社製
ポリフロンD-1)をプランジャー式2軸定量ポンプにて2
5g/時間の供給量でベント付2軸押出機のホッパーに別
々に連続して供給し、270℃でベント開放でペレット化
した。得られたペレットを3オンスの射出成形機により
340℃、金型温度80℃見本板を成形した。見本板の面を1
00倍の顕微鏡写真で判定したところ、その表面は極めて
平滑で光択のある満足できるものであった。Example 1 5000 parts by weight of a polycarbonate powder having a viscosity average degree of polymerization of 22000 was mixed with 10 parts by weight of carbon black, and the mixture was dried at 130 ° C. for 5 hours with a table feeder at a supply rate of 5 kg / hour, while fibril forming ability was obtained. Aqueous dispersion (Polyflon D-1 manufactured by Daikin Co., Ltd.) containing 60% by weight of polyethylene tetrafluoride having a
It was continuously fed separately to the hopper of a twin-screw extruder with a vent at a feed rate of 5 g / hour, and pelletized by vent opening at 270 ° C. The resulting pellets are then placed in a 3 ounce injection molding machine
A sample plate was molded at 340 ° C and a mold temperature of 80 ° C. 1 side of sample board
The surface was extremely smooth and judged to be satisfactory with light selection, as judged by a micrograph taken at 00 times.
実施例2 実施例1のカーボンブラックを混合したポリカーボネー
ト粉体に更にテトラブロモビスフエノールAのカーボネ
ートオリゴマー250重量部を混合する以外は実施例1と
同様にしてペレットを作成し、見本板と難燃試験片5本
を作成した。見本板の表面を100倍の顕微鏡写真で判定
したところ、その表面は極めて平滑で光択のある満足で
きるものであり、難燃性はV−0であった。Example 2 Pellets were prepared in the same manner as in Example 1 except that 250 parts by weight of a carbonate oligomer of tetrabromobisphenol A was further mixed with the polycarbonate powder mixed with the carbon black of Example 1, pellets were prepared, and a flame retardant plate was prepared. Five test pieces were prepared. When the surface of the sample plate was judged by a 100 times micrograph, the surface was extremely smooth and satisfactory with light selection, and the flame retardancy was V-0.
比較例1 実施例1のカーボンブラックを混合したポリカーボネー
ト粉体に、更にフィリブリル形成能を有する四フッ化ポ
リエチレン粉末(三井デュポンフロロケミカル社製テフ
ロン6J)15重量部を混合し、四フッ化ポリエチレンの
分散液の供給をとめる以外は実施例1と同様にしてペレ
ットを作成し、見本板を作成した。見本板の表面を100
倍の顕微鏡写真で判定したところ、その表面は大きな凹
凸を呈し、光沢も悪く、フッ化ポリエチレン粉末の分散
不良であることは一目瞭然である。Comparative Example 1 Polycarbonate powder mixed with carbon black of Example 1 was further mixed with 15 parts by weight of tetrafluoride polyethylene powder (Teflon 6J manufactured by Mitsui DuPont Fluorochemicals Co., Ltd.) having a capability of forming fibrilyl, to obtain tetrafluoroethylene polyethylene. Pellets were prepared and sample plates were prepared in the same manner as in Example 1 except that the supply of the dispersion liquid was stopped. 100 on the surface of the sample board
Judging from a doubled photomicrograph, it is obvious that the surface has large irregularities, the gloss is poor, and the fluorinated polyethylene powder is poorly dispersed.
Claims (1)
チレンを分散せしめた熱可塑性樹脂成形物を押出機を用
いて製造するに当り、該四フッ化ポリエチレンを分散液
となし、これを熱可塑性樹脂に混合することなく連続的
に供給して押出機内において混合分散せしめることを特
徴とする熱可塑性樹脂成形物の製造法。1. A process for producing a thermoplastic resin molded product in which tetrafluoropolyethylene capable of forming fibrils is dispersed by using an extruder, wherein the tetrafluoropolyethylene is used as a dispersion liquid, which is a thermoplastic resin. A method for producing a thermoplastic resin molded article, characterized in that the thermoplastic resin molded article is continuously fed without being mixed with the mixture and mixed and dispersed in an extruder.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63154953A JPH0655835B2 (en) | 1988-06-24 | 1988-06-24 | Method for manufacturing thermoplastic resin molding |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63154953A JPH0655835B2 (en) | 1988-06-24 | 1988-06-24 | Method for manufacturing thermoplastic resin molding |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH026536A JPH026536A (en) | 1990-01-10 |
JPH0655835B2 true JPH0655835B2 (en) | 1994-07-27 |
Family
ID=15595523
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63154953A Expired - Lifetime JPH0655835B2 (en) | 1988-06-24 | 1988-06-24 | Method for manufacturing thermoplastic resin molding |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0655835B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995033008A1 (en) * | 1994-05-31 | 1995-12-07 | Kanegafuchi Kagaku Kogyo Kabushiki Kaisha | Fluororesin-containing resin composition, process for producing the same, and thermo-forming sheet and foam made therefrom |
JP2003096201A (en) * | 2001-09-27 | 2003-04-03 | Asahi Kasei Corp | Method of manufacturing thermoplastic resin composition containing fluoropolymer |
US8377337B2 (en) * | 2010-05-04 | 2013-02-19 | Sabic Innovative Plastics Ip B.V. | Method of incorporating an additive into a polyamide-poly(arylene ether) composition, composition prepared thereby, and article comprising the composition |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5741324A (en) * | 1980-08-22 | 1982-03-08 | Hitachi Ltd | Manufacture of stainless steel strip |
DE3420002A1 (en) * | 1984-05-29 | 1985-12-05 | Bayer Ag, 5090 Leverkusen | POLYMER POWDER COMPOSITIONS CONTAINING TETRAFLUORETHYLENE POLYMER |
-
1988
- 1988-06-24 JP JP63154953A patent/JPH0655835B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH026536A (en) | 1990-01-10 |
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