JP2952977B2 - Molding method of fiber reinforced resin - Google Patents
Molding method of fiber reinforced resinInfo
- Publication number
- JP2952977B2 JP2952977B2 JP2186099A JP18609990A JP2952977B2 JP 2952977 B2 JP2952977 B2 JP 2952977B2 JP 2186099 A JP2186099 A JP 2186099A JP 18609990 A JP18609990 A JP 18609990A JP 2952977 B2 JP2952977 B2 JP 2952977B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- fibers
- reinforced resin
- reinforcing
- resin
- 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
- 239000000835 fiber Substances 0.000 title claims description 52
- 229920005989 resin Polymers 0.000 title claims description 37
- 239000011347 resin Substances 0.000 title claims description 37
- 238000000465 moulding Methods 0.000 title claims description 16
- 238000000034 method Methods 0.000 title claims description 9
- 239000012783 reinforcing fiber Substances 0.000 claims description 36
- 239000008188 pellet Substances 0.000 claims description 33
- 229920005992 thermoplastic resin Polymers 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 description 11
- 239000003365 glass fiber Substances 0.000 description 11
- 229920002292 Nylon 6 Polymers 0.000 description 8
- 239000011159 matrix material Substances 0.000 description 8
- 238000001746 injection moulding Methods 0.000 description 7
- 239000012784 inorganic fiber Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229920006351 engineering plastic Polymers 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920006306 polyurethane fiber Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (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、繊維強化樹脂成形方法に関するものであ
る。Description: TECHNICAL FIELD The present invention relates to a fiber-reinforced resin molding method.
（従来の技術） 近年、無機繊維等の補強繊維を熱可塑性樹脂中に混入
することにより樹脂の強化が行われている。特に、最近
では従来のエンジニアリングプラスチック（以後エンプ
ラと略す）に対して樹脂中の補強繊維が十数mmと比較的
長い繊維を混入させた繊維強化樹脂ペレット（以後、長
繊維強化樹脂ペレットと言う）の開発が盛んである。こ
れら長繊維強化樹脂ペレットは電線被覆のごとく補強繊
維束を溶融樹脂浴中に通し補強繊維中に樹脂を含浸・固
化させた後所定の長さにカットすることにより作製され
ている。これら長繊維強化樹脂ペレットの目的は成形後
の成形品中の補強繊維が長いことにより成形品の機械的
物性が従来のエンプラのそれより改善されることを期待
とするものである。また、これら長繊維強化樹脂ペレッ
トの成形は一般的には射出成形法にて行われている。(Prior Art) In recent years, resin has been reinforced by mixing reinforcing fibers such as inorganic fibers into a thermoplastic resin. In particular, recently, fiber reinforced resin pellets in which a relatively long fiber of ten or more mm in reinforcing resin in a resin is mixed with a conventional engineering plastic (hereinafter abbreviated as engineering plastic) (hereinafter referred to as a long fiber reinforced resin pellet) Has been actively developed. These long fiber reinforced resin pellets are produced by passing a reinforcing fiber bundle through a molten resin bath like a wire covering, impregnating and solidifying the resin in the reinforcing fiber, and then cutting the resin into a predetermined length. The purpose of these long-fiber-reinforced resin pellets is to expect that the mechanical properties of the molded product are improved over those of the conventional engineering plastics due to the long reinforcing fibers in the molded product after molding. The molding of these long fiber reinforced resin pellets is generally performed by an injection molding method.
（発明が解決しようとする問題点） しかしながら、上記のような長繊維強化樹脂ペレット
を射出成形法にて成形するとペレット中の補強繊維が射
出成形時にスクリュウにより損傷をうけたりまた、シリ
ンダー内において溶融樹脂のせん断力により補強繊維が
損傷をうける場合が多く結果的に補強繊維が短くなって
しまい当初の目的としていた長繊維強化樹脂使用による
射出成形品の物性向上を達成することができない。この
対策としてスクリュウの溝深さを従来のものに対して深
くすることにより補強繊維の損傷を和らげようとする試
みも行われている。確かにスクリュウの溝深さを深くす
ることにより補強繊維は長くなる傾向にあるものの補強
繊維の損傷は依然として大きく、目的とする長繊維によ
り強化された樹脂成形品を得ることはできていない。ま
た、従来のペレットが電線被覆のごとく作製されている
ため成形品中での補強繊維の分散性が悪く繊維束のまま
存在する場合が多く成形品の表面特性などを損う場合も
多く見られ、またそ補強効果も低下する傾向にある。(Problems to be Solved by the Invention) However, when the long fiber reinforced resin pellets as described above are molded by an injection molding method, the reinforcing fibers in the pellets are damaged by a screw at the time of injection molding or melted in a cylinder. In many cases, the reinforcing fibers are damaged by the shearing force of the resin, and as a result, the reinforcing fibers are shortened, and it is not possible to achieve the originally intended use of the long fiber reinforced resin to improve the physical properties of the injection molded article. As a countermeasure, attempts have been made to reduce the damage to the reinforcing fibers by increasing the depth of the groove of the screw compared to the conventional one. Although the reinforcing fibers tend to be elongated by increasing the screw groove depth, the reinforcing fibers are still severely damaged, and it has not been possible to obtain a resin molded product reinforced by the desired long fibers. In addition, since the conventional pellets are made like an electric wire covering, the dispersibility of the reinforcing fibers in the molded product is poor, and there are many cases where the fiber remains as a fiber bundle and the surface characteristics of the molded product are often impaired. Also, the reinforcing effect tends to decrease.
（問題点を解決するための手段） 本発明は、上記のような問題点を解決しようとするも
ので、即ち熱可塑性樹脂と補強繊維とからなる繊維強化
ペレットにおいて補強繊維の長さがペレットの長さと実
質的に同じ５〜50mmからなり更に補強繊維が25〜70wt％
含まれてなり該繊維強化樹脂ペレットを溶融させた後、
雄雌金型の雌型金型上へ押し出しその後雄型金型をかん
合させることによる繊維強化樹脂の成形方法であって該
ペレットが無機繊維からなる補強繊維と有機繊維からな
るマトリックス繊維とを混繊させた後マトリックス繊維
を溶融させることにより作製されたペレットを用いるこ
とを特徴とする該繊維強化樹脂成形法であり、さらに、
該繊維強化ペレットが混繊度30〜100％からなる混繊維
糸を用いてなる該繊維強化樹脂の成形方法についてであ
る。(Means for Solving the Problems) The present invention is intended to solve the above problems, that is, in a fiber-reinforced pellet comprising a thermoplastic resin and a reinforcing fiber, the length of the reinforcing fiber is smaller than that of the pellet. Consisting of 5-50mm in length and 25-70wt% of reinforcing fiber
After melting the fiber reinforced resin pellets included,
A method of molding a fiber-reinforced resin by extruding male and female molds onto a female mold and then mating the male mold, wherein the pellets comprise reinforcing fibers composed of inorganic fibers and matrix fibers composed of organic fibers. The fiber-reinforced resin molding method characterized by using a pellet produced by melting the matrix fibers after blending, further,
The present invention relates to a method for molding the fiber-reinforced resin, wherein the fiber-reinforced pellets use a mixed fiber yarn having a degree of mixture of 30 to 100%.
更に詳細に本発明について説明をおこなうと、無機繊
維からなる補強繊維と有機繊維とからなるマトリックス
繊維とを空気もしくは液体の乱流を利用することにより
混繊糸を作製する。ここで用いることができる無機繊維
とはガラス繊維、炭素繊維などを用いることができ、ま
た、有機繊維とは、いわゆる熱可塑性樹脂を用いたもの
ならいずれでもよく例えば、ポリアミド繊維、ポリエス
テル繊維、ポリプロピレン繊維、ポリカーボネート繊
維、ポリフェニレンサルファイド繊維、ポリウレタン繊
維などの一種もしくは二種以上を混合したものなどを用
いることができる。また、混繊糸は補強繊維とマトリッ
クス繊維とができるだけ均一に混ざっていることが望ま
しくその混繊度は30〜100％が好ましく更に好ましくは5
0〜100％であることが望ましい。これは混繊度が30％未
満では後に述べる混繊糸を原料とした繊維強化樹脂ペレ
ット中においての補強繊維の樹脂による含浸性が不十分
となり良好なペレットが得られず目的とする機械特性及
び表面性が良好な成形品を得ることはできないことによ
る。これらの範囲の混繊糸からなるペレットを用いるこ
とにより成形品中においても補強繊維が均一に分散され
ることによる良好な機械特性を有し且つ良好な表面性を
有した長繊維強化樹脂成形品を得ることができる。ここ
でいう混繊度とは以下のような式により算出された値を
意味している。To describe the present invention in more detail, a mixed fiber is produced by using a turbulent air or liquid flow of a reinforcing fiber composed of inorganic fibers and a matrix fiber composed of organic fibers. The inorganic fibers that can be used here can be glass fibers, carbon fibers, and the like, and the organic fibers can be any of those using a so-called thermoplastic resin, such as polyamide fibers, polyester fibers, and polypropylene. Fibers, polycarbonate fibers, polyphenylene sulfide fibers, polyurethane fibers and the like, or a mixture of two or more of them can be used. Further, the mixed fiber is preferably such that the reinforcing fiber and the matrix fiber are mixed as uniformly as possible, and the degree of the mixed fiber is preferably 30 to 100%, more preferably 5 to 100%.
Desirably, it is 0 to 100%. This is because if the degree of blending is less than 30%, the impregnating property of the reinforcing fiber in the fiber-reinforced resin pellets made of the blended fiber as described later becomes insufficient, so that good pellets cannot be obtained and the desired mechanical properties and surface This is because a molded article having good properties cannot be obtained. A long fiber reinforced resin molded article having good mechanical properties and good surface properties due to the uniform dispersion of the reinforcing fibers even in the molded article by using the pellets comprising the mixed fiber in these ranges. Can be obtained. The degree of blending here means a value calculated by the following equation.
また、混繊糸を作製する際においては補強繊維の含有
率は25〜70wt％が好ましい。これは、25wt％以下では補
強繊維の補強効果が乏しく良好な機械物性を有した成形
品を得ることができない。また、70wt％以上では補強繊
維を十分にマトリックス樹脂で濡らすことは難しく良好
な機械特性及び良好は表面性を有した繊維強化樹脂成形
品を得ることはできない。このようにして得られた混繊
糸を原料として該混繊糸に対流、輻射のいずれかの方法
を用いることにより熱を付与することによりマトリック
ス繊維のみを溶融させる。その後、例えば凹凸金属かん
合ロールを用い圧力を加えることによりマトリックス樹
脂を補強繊維中に含浸させる。その後、得られたロッド
状物をペレタイザーにより５〜50mmにカットし所定の繊
維強化樹脂ペレットを得る。ペレットが5mm以下では補
強繊維の長さが短く目的とする機械特性を有した繊維強
化樹脂成形品を得ることができずまた、50mm以上では成
形の際に繊維の流動不良が生じ良好な表面性が得られな
い。また、均一な補強繊維の分散がなされず目的とする
機械特性を得ることができない。このようにして得られ
た繊維強化樹脂ペレットを外力をかけることなく溶融さ
せ、その後隙間をあけた金型上へ溶融したペレットを極
力せん断力がかからない状態で押し出す。この際金型は
必ずしも全開である必要はなく半閉じの状態でもよい。
その後、金型を閉じ金型内の溶融樹脂が固化するまで一
定圧力をかけながら冷却する。その後成形品を金型外へ
取り出す。このような工程を経ることにより補強繊維の
損傷をほとんど受けることなく得られた成形品中におい
ても長い補強繊維により強化され且つ均一に補強繊維が
成形品中において分散することによって機械特性に優れ
且つ良好な表面性を有した樹脂成形品を得ることができ
る。 Further, when producing the mixed fiber, the content of the reinforcing fiber is preferably 25 to 70 wt%. If the content is less than 25 wt%, the reinforcing effect of the reinforcing fibers is poor, and a molded article having good mechanical properties cannot be obtained. On the other hand, if it is 70 wt% or more, it is difficult to sufficiently wet the reinforcing fibers with the matrix resin, and it is not possible to obtain a fiber-reinforced resin molded product having good mechanical properties and good surface properties. Using the mixed fiber thus obtained as a raw material, the matrix fiber is melted by applying heat to the mixed fiber using any of convection and radiation. Thereafter, the matrix resin is impregnated into the reinforcing fibers by applying pressure using, for example, an uneven metal engagement roll. Thereafter, the obtained rod-like material is cut into a size of 5 to 50 mm by a pelletizer to obtain a predetermined fiber-reinforced resin pellet. If the pellet is less than 5 mm, the length of the reinforcing fiber is too short to obtain a fiber-reinforced resin molded product with the desired mechanical properties.If the pellet is more than 50 mm, poor fiber flow occurs during molding and good surface properties Can not be obtained. Further, the dispersion of the reinforcing fibers is not uniform, and the desired mechanical properties cannot be obtained. The fiber-reinforced resin pellets thus obtained are melted without applying an external force, and then the melted pellets are extruded onto a mold with a gap in a state where shearing force is not applied as much as possible. At this time, the mold does not necessarily have to be fully opened, and may be in a semi-closed state.
Thereafter, the mold is closed and cooled while applying a constant pressure until the molten resin in the mold is solidified. Thereafter, the molded product is taken out of the mold. Through such a process, even in a molded article obtained with little damage to the reinforcing fibers, the reinforcing fibers are reinforced by long reinforcing fibers and the reinforcing fibers are uniformly dispersed in the molded article, and thus have excellent mechanical properties. A resin molded product having good surface properties can be obtained.
（実施例１〜３） 以下に本発明の実施例について説明する。(Examples 1 to 3) Examples of the present invention will be described below.
補強繊維としてＥ−ガラス繊維をマトリックス繊維と
してナイロン６繊維を用いて混繊度25％（実施例１）、
50％（実施例２）、73％（実施例３）の３種の混繊糸を
作製した。用いたガラス繊維及びナイロン６繊維の明細
は以下のようなものを用いた。Using E-glass fiber as a reinforcing fiber and nylon 6 fiber as a matrix fiber, the degree of fiber mixture is 25% (Example 1),
Three kinds of mixed fibers of 50% (Example 2) and 73% (Example 3) were produced. The following glass fibers and nylon 6 fibers were used.
Ｅ−ガラス繊維 ４ 合 計 繊 度:67.5テックス （JIS−R3420） フィラメント数:400本 （ 同 上 ） ナイロン６繊維 合 計 繊 度:150デニール （JIS−Ｌ−1013） フィラメント数:30本 （ 同 上 ） これらのガラス繊維及びナイロン６繊維を用いて、ナ
イロン６繊維８本をＥガラス繊維４本に対して＋0.3％
のオーバーフィード状態で供給し空気ふん射方式のエア
ノズル（空気圧力:5kg/cm2G,加工速度:100m/min）によ
り混繊糸を得た。次に、該混繊糸15本を10m/minの速度
で連続的に加熱空気中で230℃まで昇温し引き続き遠赤
外線ヒーターを設置した加熱帯に窒素ガス1.5Nm/h流し
ながら該混繊糸300℃まで昇温しナイロン６繊維を溶融
させた後６対の雄雌かん合ローラ（ローラ温度:40〜50
℃、成形溝幅:3mmローラ圧力（線圧）:2kg/cm）を用い
て幅が3mm厚みが1mmのロッドを成形し、該ロッドを長さ
10mmに切断して繊維強化樹脂ペレットを得た。E-glass fiber 4 total fineness: 67.5 tex (JIS-R3420) Number of filaments: 400 (same as above) Nylon 6 fiber total fineness: 150 denier (JIS-L-1013) Number of filaments: 30 (same as above) Above) Using these glass fibers and nylon 6 fibers, 8 nylon 6 fibers are added by 0.3% to 4 E glass fibers.
And the mixed fiber was obtained by an air spray type air nozzle (air pressure: 5 kg / cm2G, processing speed: 100 m / min). Next, the fibrous yarn was continuously heated to 230 ° C. in heated air at a speed of 10 m / min at a speed of 10 m / min, and then continuously mixed with 1.5 Nm / h of nitrogen gas through a heating zone equipped with a far-infrared heater. The temperature of the yarn is raised to 300 ° C to melt the nylon 6 fiber, and then 6 pairs of male and female mating rollers (roller temperature: 40-50
℃, forming groove width: 3mm, using a roller pressure (linear pressure): 2kg / cm) to form a rod 3mm in width and 1mm in thickness, the length of the rod
It was cut to 10 mm to obtain a fiber-reinforced resin pellet.
上記のようにして得られたペレットをプランジャーシ
リンダー内において溶融させ、その後プランジャーによ
りできるだけせん断力が生じない速度にて所定の成形品
を得る空間より大きく隙間を開けた雌型金型上へ押し出
した。その後すばやく金型を閉じ、同時に金型の冷却を
行い所定の温度まで冷却した後金型より成形品を取り出
した。The pellets obtained as described above are melted in a plunger cylinder, and thereafter, onto a female mold having a gap larger than a space for obtaining a predetermined molded product at a speed at which shear force is not generated by the plunger as much as possible. Extruded. Thereafter, the mold was quickly closed, and at the same time, the mold was cooled and cooled to a predetermined temperature, and then a molded product was taken out from the mold.
成形は次のような条件にて行った。 The molding was performed under the following conditions.
成形温度 :280℃ 金型注入圧力:100kg/cm2 金型内圧力 : 30kg/cm2 金型温度 : 80℃ 成形品の特性を表１、２に掲げた。Molding temperature: 280 ° C. Mold injection pressure: 100 kg / cm 2 Mold pressure: 30 kg / cm 2 Mold temperature: 80 ° C. Tables 1 and 2 show the characteristics of the molded products.
（比較例１〜２） 実施例１と同様のGF及びナイロン６繊維を用いて、比
較例１として補強繊維の含有率を15wt％、比較例２とし
て補強繊維の含有率75wt％の混繊糸を得、実施例１と同
様の成形を行った。(Comparative Examples 1-2) Using the same GF and nylon 6 fibers as in Example 1, a mixed fiber having a reinforcing fiber content of 15 wt% as Comparative Example 1 and a reinforcing fiber content of 75 wt% as Comparative Example 2 And the same molding as in Example 1 was performed.
成形品特性を表１、２に掲げた。 Tables 1 and 2 show the molded article characteristics.
（比較例３〜４） 実施例１と同じ混繊糸を用いて同じ製法にて長さが次
のように異なるペレットを作製した。比較例3:2mm、比
較例4:100mm。これらのペレットを用いて実施例１と同
じ条件にて成形を行った。(Comparative Examples 3 and 4) Pellets having different lengths as described below were produced by the same production method using the same mixed yarn as in Example 1. Comparative Example 3: 2 mm, Comparative Example 4: 100 mm. Using these pellets, molding was performed under the same conditions as in Example 1.
成形品特性を表１、２に掲げた。 Tables 1 and 2 show the molded article characteristics.
（比較例５） 電線被覆法に準じ溶融樹脂中をガラス繊維のロービン
グを通過させ、ガラス繊維束中に樹脂を含浸させるいわ
ゆる溶融含浸法により実施例と同じ組成の繊維強化チッ
プを作製した。これを用いて実施例と同条件にて成形を
行った。得られた成形品の特性を表１、２に掲げた。(Comparative Example 5) A fiber-reinforced chip having the same composition as that of the example was produced by a so-called melt impregnation method in which a glass fiber roving was passed through a molten resin in accordance with the electric wire coating method and the glass fiber bundle was impregnated with the resin. Using this, molding was performed under the same conditions as in the example. Tables 1 and 2 show the properties of the obtained molded products.
（比較例６） 実施例１と同じ混繊糸を用いて、同じ製法にて10mm長
のペレットを作成した。このペレットを従来の射出成形
法により射出成形を行い、本発明による成形品との機械
物性の比較を行った。(Comparative Example 6) Using the same mixed fiber as in Example 1, a pellet having a length of 10 mm was produced by the same manufacturing method. The pellets were injection-molded by a conventional injection molding method, and the mechanical properties of the pellets were compared with those of the molded article of the present invention.
射出成形は以下のような条件にて行った。 Injection molding was performed under the following conditions.
射出成形機：東芝機械（株）製IS−100 EN 射出成形条件 成形温度:285℃ 射出速度： 4m/min 金型温度: 80℃ 得られた成形品の特性を表１、２に掲げた。 Injection molding machine: IS-100 EN manufactured by Toshiba Machine Co., Ltd. Injection molding conditions Molding temperature: 285 ° C. Injection speed: 4 m / min Mold temperature: 80 ° C. Tables 1 and 2 show the characteristics of the obtained molded products.
尚、曲げ試験はASTM D790にまた、引っ張り試験はAST
M D738にまた、アイゾット衝撃試験はASTM D256に従っ
て行った。また、実施例及び比較例により得られた成形
品中のガラス繊維の長さをナイロン６を燃焼分解させた
後ガラス繊維のみをとり出しその長さ分布を測定した。
また、成形品の表面性は目視にて判定を行った。The bending test was performed according to ASTM D790, and the tensile test was performed according to AST.
Also on M D738, the Izod impact test was performed according to ASTM D256. Further, the length of the glass fiber in the molded product obtained in each of the examples and the comparative examples was determined by burning and decomposing nylon 6, and only the glass fiber was taken out and its length distribution was measured.
In addition, the surface properties of the molded product were visually determined.
また、実施例３と比較例５とのサンプルを軟Ｘ線によ
り写真を撮影したところ、比較例５の場合のほうが実施
例３に対してガラス繊維の繊維束としての塊状態のもの
が多く認められた。これは、表面性に影響しているもの
と思われる。 In addition, when photographs of the samples of Example 3 and Comparative Example 5 were taken with soft X-rays, the case of Comparative Example 5 was larger than that of Example 3 in a lump state as a glass fiber bundle. Was done. This seems to affect the surface properties.
（本発明の効果） 本発明における成形法を用いることにより補強繊維の
損傷が少なく機械特性の良好で且つ表面性が良好な繊維
強化樹脂成形品を得ることができる。(Effects of the Present Invention) By using the molding method of the present invention, a fiber-reinforced resin molded product having less damage to the reinforcing fibers, good mechanical properties and good surface properties can be obtained.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) B29C 43/00 - 43/58 B29B 9/00 - 9/16 B29C 70/00 - 70/88 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 6 , DB name) B29C 43/00-43/58 B29B 9/00-9/16 B29C 70/00-70/88
Claims (1)
ら製造された、補強繊維の長さがペレットの長さと実質
的に同じでかつ該ペレット長が５〜50mmであり、前記補
強繊維が25〜70wt％含まれる繊維強化樹脂ペレットを溶
融させた後雌型金型上へ押し出しその後金型を閉じるこ
とによる繊維強化樹脂の成形方法。The reinforcing fiber produced from a mixed fiber bundle of a thermoplastic resin fiber and a reinforcing fiber, wherein the reinforcing fiber has a length substantially equal to the length of the pellet and the pellet length is 5 to 50 mm; A method of molding a fiber-reinforced resin by melting a fiber-reinforced resin pellet containing 25 to 70 wt% of a fiber, extruding the pellet onto a female mold, and then closing the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2186099A JP2952977B2 (en) | 1990-07-12 | 1990-07-12 | Molding method of fiber reinforced resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2186099A JP2952977B2 (en) | 1990-07-12 | 1990-07-12 | Molding method of fiber reinforced resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0471810A JPH0471810A (en) | 1992-03-06 |
| JP2952977B2 true JP2952977B2 (en) | 1999-09-27 |
Family
ID=16182349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2186099A Expired - Fee Related JP2952977B2 (en) | 1990-07-12 | 1990-07-12 | Molding method of fiber reinforced resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2952977B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102329518A (en) * | 2011-07-26 | 2012-01-25 | 句容市百事特复合材料有限公司 | Textured yarn continuous fiber reinforced plastic grain and producing method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107385594A (en) * | 2016-04-05 | 2017-11-24 | 旭化成株式会社 | Complex yarn and cloth and silk and their manufacture method |
| JP2023074133A (en) * | 2021-11-17 | 2023-05-29 | 日本電気硝子株式会社 | Manufacturing method of doubling roving, doubling roving, and glass fiber reinforced resin molding |
-
1990
- 1990-07-12 JP JP2186099A patent/JP2952977B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102329518A (en) * | 2011-07-26 | 2012-01-25 | 句容市百事特复合材料有限公司 | Textured yarn continuous fiber reinforced plastic grain and producing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0471810A (en) | 1992-03-06 |
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