JP3075136B2 - Method for producing thermoplastic resin molding material - Google Patents

Method for producing thermoplastic resin molding material

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Publication number
JP3075136B2
JP3075136B2 JP07098229A JP9822995A JP3075136B2 JP 3075136 B2 JP3075136 B2 JP 3075136B2 JP 07098229 A JP07098229 A JP 07098229A JP 9822995 A JP9822995 A JP 9822995A JP 3075136 B2 JP3075136 B2 JP 3075136B2
Authority
JP
Japan
Prior art keywords
thermoplastic resin
molding material
resin molding
glass fiber
filler
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
Application number
JP07098229A
Other languages
Japanese (ja)
Other versions
JPH08290425A (en
Inventor
佳男 粉谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP07098229A priority Critical patent/JP3075136B2/en
Publication of JPH08290425A publication Critical patent/JPH08290425A/en
Application granted granted Critical
Publication of JP3075136B2 publication Critical patent/JP3075136B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Reinforced Plastic Materials (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は、ガラス繊維を含有する
熱可塑性樹脂成形材料の製造方法に関する。The present invention relates to a method for producing a thermoplastic resin molding material containing glass fibers.

【０００２】[0002]

【従来の技術】ポリプロピレン（ＰＰ）樹脂成形材料、
ポリブチレンテレフタレート（ＰＢＴ）樹脂成形材料又
はアクリロニトリル−ブタジエン−スチレン（ＡＢＳ）
樹脂成形材料等の熱可塑性樹脂成形材料の機械的強度及
び耐熱性等を向上させるために、ガラス繊維を用いる。
熱可塑性樹脂、ガラス繊維及び充填剤を含有する熱可塑
性樹脂成形材料は、混練押出機を用いて製造するのが一
般的である。この混練押出機は、通常、熱可塑性樹脂及
び充填剤を投入する一次投入口と、紐状の熱可塑性樹脂
成形材料が連続的に押し出される排出口と、この排出口
と前記一次投入口との間に配設された二次投入口とを備
えている。すなわち、従来、混練押出機の一次投入口か
ら熱可塑性樹脂及び充填剤等を投入し、二次投入口から
ガラス繊維を投入していた。ところが、二次投入口から
ガラス繊維を投入すると、混練して排出口から連続的に
押し出された紐状の熱可塑性樹脂成形材料（以下ストラ
ンドと称する）が切れてしまうという問題があった。特
に、ガラス繊維の含有量が多い熱可塑性樹脂成形材料を
製造する場合に、ストランドの切れが著しく、生産性が
悪いという問題があった。2. Description of the Related Art Polypropylene (PP) resin molding materials,
Polybutylene terephthalate (PBT) resin molding material or acrylonitrile-butadiene-styrene (ABS)
Glass fiber is used to improve the mechanical strength and heat resistance of a thermoplastic resin molding material such as a resin molding material.
A thermoplastic resin molding material containing a thermoplastic resin, glass fibers and a filler is generally produced using a kneading extruder. This kneading extruder usually has a primary charging port for charging a thermoplastic resin and a filler, a discharging port from which a string-shaped thermoplastic resin molding material is continuously extruded, and a discharge port between the discharging port and the primary charging port. And a secondary inlet disposed therebetween. That is, conventionally, a thermoplastic resin, a filler, and the like have been charged from a primary input port of a kneading extruder, and glass fibers have been input from a secondary input port. However, when glass fibers are introduced from the secondary inlet, there is a problem that the string-shaped thermoplastic resin molding material (hereinafter referred to as a strand) continuously kneaded and extruded from the outlet is broken. In particular, when a thermoplastic resin molding material having a large content of glass fiber is produced, there is a problem that strand breakage is remarkable and productivity is poor.

【０００３】[0003]

【発明が解決しようとする課題】本発明は前記の事実に
鑑みてなされたもので、その目的とするところは、衝撃
強度及び耐熱性等を維持した状態で、ストランドの切れ
を低減し、生産性が向上する熱可塑性樹脂成形材料の製
造方法を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned facts, and has as its object to reduce strand breakage while maintaining impact strength and heat resistance. An object of the present invention is to provide a method for producing a thermoplastic resin molding material having improved properties.

【０００４】[0004]

【課題を解決するための手段】本発明の請求項１に係る
熱可塑性樹脂成形材料の製造方法は、熱可塑性樹脂、ガ
ラス繊維及び充填剤を含有する熱可塑性樹脂成形材料
を、熱可塑性樹脂及び充填剤を投入する一次投入口と、
紐状の熱可塑性樹脂成形材料が連続的に押し出される排
出口と、この排出口と前記一次投入口との間に配設され
た二次投入口とを備える混練押出機を用いて製造する熱
可塑性樹脂成形材料の製造方法において、ガラス繊維の
全量に対して、１０〜７０重量％のガラス繊維を前記一
次投入口から投入し、残りのガラス繊維を前記二次投入
口から投入することを特徴とする。According to a first aspect of the present invention, there is provided a method for producing a thermoplastic resin molding material, comprising the steps of: converting a thermoplastic resin molding material containing a thermoplastic resin, glass fiber and a filler into a thermoplastic resin; A primary charging port for charging the filler,
Heat produced by using a kneading extruder having an outlet through which a string-shaped thermoplastic resin molding material is continuously extruded, and a secondary inlet disposed between the outlet and the primary inlet. In the method for producing a plastic resin molding material, 10 to 70% by weight of glass fibers based on the total amount of glass fibers is charged from the primary inlet, and the remaining glass fibers are charged from the secondary inlet. And

【０００５】本発明の請求項２に係る熱可塑性樹脂成形
材料の製造方法は、前記熱可塑性樹脂がＰＰ樹脂又はＰ
ＢＴ樹脂であり、前記充填剤がタルクであることを特徴
とする。According to a second aspect of the present invention, there is provided a method for producing a thermoplastic resin molding material, wherein the thermoplastic resin is a PP resin or a P resin.
BT resin, and the filler is talc.

【０００６】以下、本発明を詳述する。熱可塑性樹脂、
ガラス繊維及び充填剤を含有する熱可塑性樹脂成形材料
は、例えば、二軸混練押出機等の混練押出機を用いて製
造する。この混練押出機は、熱可塑性樹脂及び充填剤を
投入する一次投入口と、紐状の熱可塑性樹脂成形材料が
連続的に押し出される排出口と、この排出口と前記一次
投入口との間に配設された二次投入口とを備えている。
熱可塑性樹脂成形材料は、所定の配合量の熱可塑性樹脂
及び充填剤の全量と、ガラス繊維の一部を、例えば、コ
ーンブレンダー等の混合機を用いて１０分間程度混合し
た後、混練押出機の一次投入口に供給し、混練押出機の
スクリューで混練され、残りのガラス繊維が二次投入口
から供給されて、一次投入口からの供給品とともに、混
練されて、排出口から複数本の紐状のストランドとなっ
て、連続的に押出される。このストランドを冷却後、ペ
レタイザーでペレットにすることにより熱可塑性樹脂成
形材料が得られる。Hereinafter, the present invention will be described in detail. Thermoplastic resin,
The thermoplastic resin molding material containing a glass fiber and a filler is manufactured using a kneading extruder such as a twin-screw kneading extruder. This kneading extruder has a primary charging port for charging a thermoplastic resin and a filler, a discharging port for continuously extruding a string-shaped thermoplastic resin molding material, and a gap between the discharging port and the primary charging port. And a secondary inlet provided.
The thermoplastic resin molding material is obtained by mixing a predetermined amount of the thermoplastic resin and the entire amount of the filler with a part of the glass fiber, for example, using a mixer such as a cone blender for about 10 minutes, and then kneading the extruder. Is supplied to the primary inlet, kneaded with the screw of the kneading extruder, the remaining glass fibers are supplied from the secondary inlet, and are kneaded together with the supply from the primary inlet, and a plurality of fibers are supplied from the outlet. It becomes a string-like strand and is continuously extruded. After cooling this strand, it is pelletized with a pelletizer to obtain a thermoplastic resin molding material.

【０００７】本発明に係る熱可塑性樹脂成形材料の製造
方法は、ガラス繊維の全量に対して、１０〜７０重量％
のガラス繊維を前記一次投入口から供給し、残りのガラ
ス繊維を二次投入口から供給して混練押出を行うことが
必須である。すなわち、混練押出機の一次投入口から投
入するガラス繊維の量がガラス繊維の全量に対して１０
重量％未満の場合には、ストランドが切れ易く、生産性
が悪くなり、７０重量％を越える場合には、衝撃強度及
び熱変形温度が低くなってしまう。The method for producing a thermoplastic resin molding material according to the present invention is characterized in that 10 to 70% by weight based on the total amount of glass fibers.
It is essential to perform the kneading and extruding by supplying the glass fiber of the above from the primary inlet and supplying the remaining glass fiber from the secondary inlet. That is, the amount of the glass fiber fed from the primary inlet of the kneading extruder is 10% of the total amount of the glass fiber.
When the amount is less than 70% by weight, the strand is liable to be cut and the productivity is deteriorated.

【０００８】本発明で用いる熱可塑性樹脂としては、例
えば、ＰＰ樹脂又はＰＢＴ樹脂等が挙げられ、充填剤と
してはタルク等が例示できる。[0008] Examples of the thermoplastic resin used in the present invention include PP resin and PBT resin, and examples of the filler include talc.

【０００９】[0009]

【作用】本発明の請求項１及び請求項２に係る熱可塑性
樹脂成形材料の製造方法は、熱可塑性樹脂、ガラス繊維
及び充填剤を含有する熱可塑性樹脂成形材料を、熱可塑
性樹脂及び充填剤を投入する一次投入口と、紐状の熱可
塑性樹脂成形材料が連続的に押し出される排出口と、こ
の排出口と前記一次投入口との間に配設された二次投入
口とを備える混練押出機を用いて製造する熱可塑性樹脂
成形材料の製造方法において、ガラス繊維の全量に対し
て、１０〜７０重量％のガラス繊維を前記一次投入口か
ら投入し、残りのガラス繊維を前記二次投入口から投入
するので、熱可塑性樹脂成形材料の中でガラス繊維が均
一に分散するため、ストランドの強度バラツキが小さ
い。According to a first aspect of the present invention, there is provided a method for producing a thermoplastic resin molding material, comprising the steps of: converting a thermoplastic resin molding material containing a thermoplastic resin, glass fiber and a filler into a thermoplastic resin and a filler; Kneading having a primary input port for charging the resin, a discharge port from which a string-shaped thermoplastic resin molding material is continuously extruded, and a secondary input port disposed between the discharge port and the primary input port. In the method for producing a thermoplastic resin molding material produced by using an extruder, 10 to 70% by weight of glass fiber with respect to the total amount of glass fiber is charged from the primary charging port, and the remaining glass fiber is mixed with the secondary glass fiber. Since the glass fibers are introduced from the inlet, the glass fibers are uniformly dispersed in the thermoplastic resin molding material, so that the strength variation of the strand is small.

【００１０】[0010]

【実施例】以下、本発明を実施例によって具体的に説明
する。The present invention will be specifically described below with reference to examples.

【００１１】（実施例１及び実施例２並びに比較例１〜
比較例４）熱可塑性樹脂として、ＰＰ樹脂（宇部興産株
式会社製；商品名Ｓ−１３０ＭＸ）又はＰＢＴ樹脂（株
式会社クラレ製；商品名２７３Ｆ）を用い、この熱可塑
性樹脂とガラス繊維（日本硝子繊維株式会社製；商品名
ＴＰ−７２）と充填剤であるタルク（林化成株式会社
製；商品名タルカンパウダーＰＫ−Ｃ）とを表１に示し
た配合で熱可塑性樹脂成形材料の原材料とした。ＰＰ樹
脂成形材料又はＰＢＴ樹脂成形材料は、表１に示したガ
ラス繊維（二次側）を除いた配合でコーンブレンダーを
用いて１０分間混合した後、前記原材料を二軸混練押出
機の一次投入口に供給し、ガラス繊維（二次側）を二軸
混練押出機の二次投入口から供給して、ＰＰ樹脂成形材
料については、シリンダー温度２００〜２３０℃で、Ｐ
ＢＴ樹脂成形材料については、シリンダー温度２４０〜
２６０℃で混練押出を行い、紐状のストランドにして、
冷却後、ペレタイザーでペレットにすることにより、Ｐ
Ｐ樹脂成形材料又はＰＢＴ樹脂成形材料を得た。ストラ
ンドが切れ易く、生産性が悪いものを生産性不良、スト
ランドが切れ難く、生産性の良いものを生産性良好とし
て表１に示した。これらのＰＰ樹脂成形材料又はＰＢＴ
樹脂成形材料を射出成形してアイゾット衝撃強さ及び耐
熱性の評価尺度である熱変形温度用のテストピースを得
た。アイゾット衝撃強さについては、ＡＳＴＭ Ｄ２５
６、熱変形温度については、ＡＳＴＭ Ｄ６４８に準じ
て測定した。その結果を表１に示した。(Examples 1 and 2 and Comparative Examples 1 to 1)
Comparative Example 4) As the thermoplastic resin, a PP resin (manufactured by Ube Industries, Ltd .; trade name: S-130MX) or a PBT resin (manufactured by Kuraray; trade name: 273F) was used. Textile Co., Ltd .; trade name TP-72) and talc as a filler (manufactured by Hayashi Kasei Co., Ltd .; trade name: talcan powder PK-C) were used as raw materials for the thermoplastic resin molding material in the composition shown in Table 1. . The PP resin molding material or the PBT resin molding material was mixed for 10 minutes using a cone blender in a composition excluding the glass fiber (secondary side) shown in Table 1, and then the raw materials were primarily charged in a twin-screw kneading extruder. The glass fiber (secondary side) is supplied from the secondary inlet of the twin-screw kneading extruder, and the PP resin molding material is supplied at a cylinder temperature of 200 to 230 ° C.
For BT resin molding material, cylinder temperature 240 ~
Perform kneading and extrusion at 260 ° C to make a string-like strand,
After cooling, pelletize with a pelletizer to obtain P
A P resin molding material or a PBT resin molding material was obtained. Table 1 shows that the strands that were easy to cut and had poor productivity were poor in productivity, and the strands that were hard to cut and had good productivity were good in productivity. These PP resin molding materials or PBT
A resin molding material was injection molded to obtain a test piece for heat distortion temperature, which is an evaluation scale for Izod impact strength and heat resistance. ASTM D25 for Izod impact strength
6. The heat distortion temperature was measured according to ASTM D648. The results are shown in Table 1.

【００１２】[0012]

【表１】 [Table 1]

【００１３】表１の結果、本発明の実施例では、比較例
に比べて、衝撃強度及び耐熱性等を維持した状態で、ス
トランドの切れを低減し、生産性が向上する熱可塑性樹
脂成形材料の製造方法であることが確認できた。As shown in Table 1, in the examples of the present invention, in comparison with the comparative example, the thermoplastic resin molding material in which the breakage of the strand is reduced and the productivity is improved while maintaining the impact strength and heat resistance and the like. It was confirmed that this was a production method.

【００１４】[0014]

【発明の効果】本発明の請求項１及び請求項２に係る熱
可塑性樹脂成形材料の製造方法によると、ガラス繊維の
全量に対して、１０〜７０重量％のガラス繊維を前記一
次投入口から投入し、残りのガラス繊維を混練押出機の
二次投入口から投入するので、熱可塑性樹脂成形材料の
中でガラス繊維が均一に分散する。このため、ストラン
ドの強度バラツキが小さいので、ストランドの切れが低
減され、生産性に優れる。According to the method for producing a thermoplastic resin molding material according to the first and second aspects of the present invention, 10 to 70% by weight of glass fiber is supplied from the primary inlet to the total amount of glass fiber. Since the glass fibers are charged and the remaining glass fibers are charged from the secondary charging port of the kneading extruder, the glass fibers are uniformly dispersed in the thermoplastic resin molding material. For this reason, since the strength variation of the strand is small, the breakage of the strand is reduced, and the productivity is excellent.

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｂ２９Ｋ 309:08 (58)調査した分野(Int.Cl.7，ＤＢ名) B29B 11/16 B29B 7/48,7/90 C08J 3/20 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 identification code FI B29K 309: 08 (58) Fields investigated (Int.Cl. 7 , DB name) B29B 11/16 B29B 7/48, 7/90 C08J 3/20

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 熱可塑性樹脂、ガラス繊維及び充填剤を
含有する熱可塑性樹脂成形材料を、熱可塑性樹脂及び充
填剤を投入する一次投入口と、紐状の熱可塑性樹脂成形
材料が連続的に押し出される排出口と、この排出口と前
記一次投入口との間に配設された二次投入口とを備える
混練押出機を用いて製造する熱可塑性樹脂成形材料の製
造方法において、ガラス繊維の全量に対して、１０〜７
０重量％のガラス繊維を前記一次投入口から投入し、残
りのガラス繊維を前記二次投入口から投入することを特
徴とする熱可塑性樹脂成形材料の製造方法。1. A thermoplastic resin-containing material containing a thermoplastic resin, a glass fiber and a filler, a primary charging port for supplying a thermoplastic resin and a filler, and a string-like thermoplastic resin-forming material are continuously connected. In a method for manufacturing a thermoplastic resin molding material manufactured using a kneading extruder having a discharge port to be extruded and a secondary input port disposed between the discharge port and the primary input port, a method of producing glass fiber 10-7 for the total amount
A method for producing a thermoplastic resin molding material, wherein 0% by weight of glass fiber is charged from the primary inlet, and the remaining glass fiber is charged from the secondary inlet. 【請求項２】 前記熱可塑性樹脂がＰＰ樹脂又はＰＢＴ
樹脂であり、前記充填剤がタルクであることを特徴とす
る請求項１記載の熱可塑性樹脂成形材料の製造方法。2. The method according to claim 1, wherein the thermoplastic resin is a PP resin or a PBT.
The method for producing a thermoplastic resin molding material according to claim 1, wherein the resin is a resin, and the filler is talc.
JP07098229A 1995-04-24 1995-04-24 Method for producing thermoplastic resin molding material Expired - Lifetime JP3075136B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP07098229A JP3075136B2 (en) 1995-04-24 1995-04-24 Method for producing thermoplastic resin molding material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP07098229A JP3075136B2 (en) 1995-04-24 1995-04-24 Method for producing thermoplastic resin molding material

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JPH08290425A JPH08290425A (en) 1996-11-05
JP3075136B2 true JP3075136B2 (en) 2000-08-07

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