JPH0620742B2 - Composite plastic pellet manufacturing method - Google Patents
Composite plastic pellet manufacturing methodInfo
- Publication number
- JPH0620742B2 JPH0620742B2 JP61152737A JP15273786A JPH0620742B2 JP H0620742 B2 JPH0620742 B2 JP H0620742B2 JP 61152737 A JP61152737 A JP 61152737A JP 15273786 A JP15273786 A JP 15273786A JP H0620742 B2 JPH0620742 B2 JP H0620742B2
- Authority
- JP
- Japan
- Prior art keywords
- composite plastic
- length
- fiber
- extruder
- pellet
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
- B29B9/14—Making granules characterised by structure or composition fibre-reinforced
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- 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
- B29C48/475—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pistons, accumulators or press rams
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、射出成型用の原料として使用出来る繊維入り
複合プラスチックのペレット製造法に関するものであ
る。TECHNICAL FIELD The present invention relates to a method for producing pellets of fiber-containing composite plastic that can be used as a raw material for injection molding.
プラスチックの成型加工法としては、射出成型法が最も
一般的な方法である。The injection molding method is the most general method for molding plastics.
この場合、射出成型のプラスチック原料としては、ペレ
ット形状のものが最も一般的である。In this case, as the injection-molded plastic raw material, the pellet-shaped one is most common.
従来、繊維入り熱可塑性プラスチックのペレットの製造
法としては、長さ３〜１３mmの繊維とプラスチックペレ
ット又は粉をドライブレンドし、次いでこの混合物を二
軸押出機，ニーダー、エクストルーダー等のスクリュウ
撹拌機構を持つ混練装置で加熱溶融混練し、この生成溶
融物をペレタイジングし複合プラスチックのペレットと
することが行われていた。Conventionally, as a method for producing fiber-containing thermoplastic pellets, fibers having a length of 3 to 13 mm and plastic pellets or powder are dry-blended, and then this mixture is mixed with a screw stirring mechanism such as a twin-screw extruder, a kneader or an extruder. It has been practiced to heat-melt and knead with a kneading machine having, and pelletize the resulting molten material to obtain composite plastic pellets.
この溶融混練とペレタイジングの工程で、繊維は０．２
〜０．４mm程度の長さに寸断される。In this melt-kneading and pelletizing process, the fiber is 0.2
Shred to a length of ~ 0.4mm.
この様に、従来の繊維入り複合プラスチックにおける繊
維長は非常に短いという欠点があった。As described above, the conventional fiber-containing composite plastic has a drawback that the fiber length is very short.
以上の如く、従来の繊維入り複合プラスチックのペレッ
ト製造法においては、繊維長は０．２〜０．４mmと短
い。このため射出成型による成型品の物性のうち、特に
衝撃強度が低いという欠点がある。As described above, in the conventional method for producing pellets of fiber-containing composite plastic, the fiber length is as short as 0.2 to 0.4 mm. Therefore, among the physical properties of the injection-molded product, there is a drawback that the impact strength is particularly low.
例えば、ガラス繊維−ポリプロピレン系（繊維30wt%）
の場合、アイゾット衝撃値（ＡＳＴＭ Ｄ２５６，ノッ
チ付き２３℃）は９kgcm/cm2程度で低い。For example, glass fiber-polypropylene type (fiber 30 wt%)
In the case of, the Izod impact value (ASTM D256, notched 23 ° C.) is as low as about 9 kgcm / cm 2 .
一方、第１図に示す如く、ガラス繊維長が長いとアイゾ
ット衝撃値強度が向上する。On the other hand, as shown in FIG. 1, when the glass fiber length is long, the Izod impact strength is improved.
本発明は、プラスチックの成型のための射出成型法にお
ける、繊維入り複合プラスチックのペレット製造法の改
良にあり、衝撃値強度が高く繊維長の長い、長繊維入り
複合プラスチックのペレット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 is an improvement in a method for producing pellets of a fiber-containing composite plastic in an injection molding method for molding a plastic, and a method for producing pellets of a long-fiber composite plastic having a high impact strength and a long fiber length. It is intended to be provided.
本発明は、３〜１００mm長の長繊維及び直径１mm以下の
熱可塑性プラスチック粉体を、高速回転する撹拌羽根を
有する混合装置に装入混合し、該混合物を加熱溶融非ス
クリュウ式押出機に投入し、該押出機の先端部に設けら
れたペレタイジング用ダイスより、溶融混合物を直径２
〜１０mmの棒状に押出し、該押出物を水又は空気にて冷
却し、カッターにて長さ５〜１５mmに切断し、ペレット
とする複合プラスチックのペレット製造法である。In the present invention, long fibers having a length of 3 to 100 mm and thermoplastic powder having a diameter of 1 mm or less are charged and mixed in a mixing device having a stirring blade rotating at a high speed, and the mixture is charged into a heat melting non-screw extruder. The diameter of the molten mixture is adjusted to 2 by using a pelletizing die provided at the tip of the extruder.
It is a method of producing pellets of a composite plastic, which is extruded into a rod shape of 10 mm, cooled with water or air, cut into a length of 5 to 15 mm with a cutter, and made into pellets.
本発明の複合プラスチックのペレットの製造法において
は、長繊維の長さは３〜１００mm望ましくは１０〜５０
mmであり、熱可塑性プラスチック粉体の直径は１mm以下
望ましくは３００μｍ以下である。In the method for producing pellets of the composite plastic of the present invention, the length of the long fiber is 3 to 100 mm, preferably 10 to 50 mm.
mm, and the diameter of the thermoplastic powder is 1 mm or less, preferably 300 μm or less.
又、高速回転する撹拌羽根を有する混合装置としては、
ヘンシェルミキサーが好ましく、加熱溶融非スクリュウ
式押出機としては繊維を寸断しない押出機であればよ
く、例えばラム式押出機、プランジャー式押出機、ポン
プ式押出機がある。特にラム式押出機、モーノポンプが
好ましい。Also, as a mixing device having a stirring blade that rotates at high speed,
A Henschel mixer is preferable, and the heat-melting non-screw type extruder may be any extruder that does not cut fibers, and examples thereof include a ram type extruder, a plunger type extruder, and a pump type extruder. A ram type extruder and a mono pump are particularly preferable.
尚、ペレットの直径と長さは、射出成型機の能力で決ま
り可能な限り大きい方が良好である。The diameter and length of the pellet are determined by the capability of the injection molding machine, and the larger the diameter, the better.
次に本発明の実施例について述べる。Next, examples of the present invention will be described.
原料として、Ｅガラス繊維のチョップで直径１３μｍ，
集束本数約８００本，長さ：２５mmの長繊維及び熱可塑
性プラスチックとして粒径300μｍ以下，ＭＦＲ：８g/1
0分（at180℃）のポリプロピレンを、混合比として、 長繊維：熱可塑性プラスチック＝30wt%:70wt%の割合に
て混合し、次いで溶融押出し、繊維入り複合プラスチッ
クのペレットを製造した。その場合の条件について以下
述べる。As a raw material, E glass fiber chop with a diameter of 13 μm,
Approximately 800 bundles, length: 25 mm long fiber and thermoplastic resin particle size less than 300 μm, MFR: 8 g / 1
Polypropylene for 0 minutes (at 180 ° C.) was mixed at a mixing ratio of long fiber: thermoplastic = 30 wt%: 70 wt% and then melt-extruded to produce pellets of fiber-containing composite plastic. The conditions in that case will be described below.
混合装置としては、三井三池化工業（株）製のFM10B型
を用い、前記原料を混合し、次いで押出装置に、４０mm
φラム式押出機（ペレタイジング用ダイス：穴径＝６mm
φ，穴数＝１０ケ，）により、押出力：１０ｔ，溶融温
度：２２０℃，引取速度：２m/min,水冷冷却の条件にて
押し出す。FM10B type manufactured by Mitsui Miike Chemical Industry Co., Ltd. was used as a mixing device, the above raw materials were mixed, and then 40 mm was added to an extrusion device.
φ-ram extruder (pelletizing die: hole diameter = 6 mm
φ, number of holes = 10), push out under the conditions of extrusion force: 10 t, melting temperature: 220 ° C, take-up speed: 2 m / min, water cooling.
次に切断長さを１０mmに切断する。Next, the cutting length is cut to 10 mm.
射出成型用機器として東芝機械（株）製iS-150E(型締
力：150t)を用い、成型品（寸法３mm×１００×１００m
m）の板を成型した。IS-150E (clamping force: 150t) manufactured by Toshiba Machine Co., Ltd. is used as a machine for injection molding, and a molded product (dimension 3 mm × 100 × 100 m)
m) molded board.
成型品の物性（アイゾット衝撃値）をASTM D256の方法
にて、ノッチ付２３℃にて測定した結果、50kgcm/cm2が
得られた。The physical properties (Izod impact value) of the molded product were measured by the method of ASTM D256 at 23 ° C. with a notch, and as a result, 50 kgcm / cm 2 was obtained.
成型品中の繊維長 5mm以上のもの…約85wt% 3mm以上のもの…約90wt% であった。Molded products with fiber length of 5 mm or more ... About 85 wt% 3 mm or more ... About 90 wt%.
比較例 原料として、市販のFRPPペレットを用い，ガラス繊維30
wt%,熱可塑性プラスチック70wt%の混合比にて混合し実
施例１と同様に射出成型を行った。Comparative example Commercially available FRPP pellets were used as the raw material, and glass fiber 30
The mixture was mixed at a mixing ratio of wt% and thermoplastic resin of 70 wt% and injection molding was carried out in the same manner as in Example 1.
そして実施例１と同一方法にて物性（アイゾット衝撃
値）を測定した結果、9kg.cm/cm2を得た。Then, the physical properties (Izod impact value) were measured by the same method as in Example 1, and as a result, 9 kg.cm/cm 2 was obtained.
又成型品中の繊維長は0.5mm以下約100%であった。The fiber length in the molded product was 0.5 mm or less and about 100%.
以上の如く、本発明の複合プラスチックのペレットはペ
レット中の繊維長が5mm以上で約85wt%、3mm以上の時約9
0wt%確保出来ているので射出成型品において優れた耐衝
撃性を示す。As described above, the composite plastic pellet of the present invention has a fiber length of about 85 mm in the pellet of 5 mm or more, and about 9% when the fiber length of the pellet is 3 mm or more.
Since 0 wt% has been secured, it exhibits excellent impact resistance in injection molded products.
又押出機内において溶融物をスクリュウ等で練らないの
で繊維は殆ど切断しない。繊維の切断はカッターでペレ
ットを切断するときのみ生ずるので、必要以上に切断さ
れない。Further, since the melt is not kneaded with a screw or the like in the extruder, the fibers are hardly cut. Since the cutting of the fiber occurs only when the pellet is cut by the cutter, it is not cut more than necessary.
本発明の複合プラスチックのペレット製造法によれば、
衝撃強度の高い繊維長の長い長繊維入り複合プラスチッ
クのペレット製造法を提供することが出来る。According to the method for producing pellets of the composite plastic of the present invention,
It is possible to provide a method for producing pellets of a composite plastic containing long fibers, which has high impact strength and long fibers.
第１図は、ガラス繊維長と衝撃値との関係線図である。 FIG. 1 is a relationship diagram between the glass fiber length and the impact value.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭62−208922（ＪＰ，Ａ) 特開 昭62−209171（ＪＰ，Ａ) 特開 昭62−208906（ＪＰ，Ａ) ─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A-62-208922 (JP, A) JP-A-62-209171 (JP, A) JP-A-62-208906 (JP, A)
Claims (1)
以下の熱可塑性プラスチック粉体を高速回転する撹拌羽
根を有する混合装置に装入混合し、 該混合物を加熱溶融非スクリュウ式押出機に投入し、 該押出機の先端部に設けられたペレタイジング用ダイス
より溶融混合物を直径２〜１０ｍｍの棒状に押出し、 該押出物を水又は空気にて冷却し、 カッターにて長さ５〜１５ｍｍに切断してペレットを形
成することを特徴とする複合プラスチックのペレット製
造法。1. A long fiber having a length of 3 to 100 mm and a diameter of 1 mm.
The following thermoplastic powders are charged and mixed in a mixing device having a stirring blade rotating at a high speed, the mixture is charged into a heat-melting non-screw type extruder, and a pelletizing die provided at the tip of the extruder. Further, the molten mixture is extruded into a rod shape having a diameter of 2 to 10 mm, the extruded material is cooled with water or air, and is cut into a length of 5 to 15 mm with a cutter to form a pellet, which is a pellet of a composite plastic. Manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61152737A JPH0620742B2 (en) | 1986-07-01 | 1986-07-01 | Composite plastic pellet manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61152737A JPH0620742B2 (en) | 1986-07-01 | 1986-07-01 | Composite plastic pellet manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS639511A JPS639511A (en) | 1988-01-16 |
| JPH0620742B2 true JPH0620742B2 (en) | 1994-03-23 |
Family
ID=15547056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61152737A Expired - Lifetime JPH0620742B2 (en) | 1986-07-01 | 1986-07-01 | Composite plastic pellet manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0620742B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044882C (en) * | 1994-10-27 | 1999-09-01 | 上海欧亚合成材料有限公司 | Method for producing chemical fibre reinforced composite material |
| DE19705280C1 (en) * | 1997-02-12 | 1998-03-05 | Daimler Benz Ag | Fibre-reinforced plastics moulding used in commercial, passenger and rail vehicles and aircraft |
| CN117480288A (en) * | 2021-06-18 | 2024-01-30 | 三菱化学株式会社 | Method for manufacturing fiber assembly and method for manufacturing prepreg sheet |
-
1986
- 1986-07-01 JP JP61152737A patent/JPH0620742B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS639511A (en) | 1988-01-16 |
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