JP2826059B2 - Method for producing fiber-reinforced plastic molded article using foam as core material - Google Patents
Method for producing fiber-reinforced plastic molded article using foam as core materialInfo
- Publication number
- JP2826059B2 JP2826059B2 JP5353234A JP35323493A JP2826059B2 JP 2826059 B2 JP2826059 B2 JP 2826059B2 JP 5353234 A JP5353234 A JP 5353234A JP 35323493 A JP35323493 A JP 35323493A JP 2826059 B2 JP2826059 B2 JP 2826059B2
- Authority
- JP
- Japan
- Prior art keywords
- reinforced plastic
- foam
- fiber
- core material
- core
- 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.)
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、繊維強化プラスチック
成形品の製造方法に関する。さらに詳しくは、本発明
は、軽量化を必要とするスポーツ用品、工業製品または
その部品などに有用な発泡体を芯材とする繊維強化プラ
スチック成形品の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a fiber-reinforced plastic molded product. More specifically, the present invention relates to a method for producing a fiber-reinforced plastic molded product using a foam as a core material useful for sports goods, industrial products, parts thereof, and the like that require weight reduction.
【０００２】[0002]
【従来の技術】スポーツ用品、工業用品などの軽量化を
必要とする用途に使用される繊維強化プラスチック成形
品では、内部を中空にするか、あるいは発泡体を芯材に
用いることによって、軽量化することが行われている。2. Description of the Related Art Fiber-reinforced plastic molded products used for applications requiring weight reduction, such as sporting goods and industrial goods, are made lighter by hollowing the inside or using a foam as a core material. That is being done.
【０００３】前者の内部を中空にする方法では、成形後
の繊維強化プラスチック成形品に穴をあける方法や、可
撓性チューブに内圧をかけて繊維強化プラスチック成形
品を成形する方法、マンドレルなどの中子を中芯として
成形し、その成形後に上記の中子を引き抜いたり、溶融
する方法などが採用されている。[0003] In the former method of hollowing the inside, a method of forming a hole in a fiber-reinforced plastic molded article after molding, a method of molding a fiber-reinforced plastic molded article by applying internal pressure to a flexible tube, and a method of mandrel and the like are used. A method in which a core is formed as a core and the core is drawn out or melted after the molding is adopted.
【０００４】しかし、成形後の繊維強化プラスチック成
形品に穴をあけることは、手間がかかり、複雑な形状の
ものを作ることが困難である。また、可撓性チューブに
内圧をかけて繊維強化プラスチック成形品を成形する方
法では、複雑な形状の成形品の場合、その製品形状に合
わせた可撓性チューブを作ることが困難であり、また成
形時に可撓性チューブに内圧をかけたときに、可撓性チ
ューブの変形や膨張が不足して、可撓性チューブが製品
形状にそわず、その結果、繊維強化プラスチック部分の
占める体積が増加して、軽量化が充分に達成できないと
いう問題があった。また、成形後に中子を引き抜いた
り、溶融する方法は、密閉された成形品には採用するこ
とができないという問題があった。[0004] However, it is troublesome to make a hole in a molded fiber-reinforced plastic article after molding, and it is difficult to produce a molded article having a complicated shape. Further, in the method of molding a fiber-reinforced plastic molded product by applying internal pressure to the flexible tube, in the case of a molded product having a complicated shape, it is difficult to produce a flexible tube according to the product shape, When internal pressure is applied to the flexible tube during molding, deformation and expansion of the flexible tube are insufficient, and the flexible tube does not conform to the product shape, and as a result, the volume occupied by the fiber reinforced plastic part increases. As a result, there has been a problem that weight reduction cannot be sufficiently achieved. Further, there is a problem that the method of pulling out or melting the core after molding cannot be adopted for a sealed molded product.
【０００５】したがって、最近では、上記のような欠点
を伴わない発泡体を芯材とする成形方法が多く採用され
るようになってきた。[0005] Therefore, recently, a molding method using a foamed material which does not have the above-mentioned disadvantages as a core material has been increasingly adopted.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、この発
泡体を芯材とする繊維強化プラスチック成形品でも、期
待どおりの軽量化が達成されないという問題があった。However, even with a fiber-reinforced plastic molded product using this foam as a core material, there has been a problem that the expected weight reduction cannot be achieved.
【０００７】すなわち、成形中に芯材の発泡体が押し潰
され、その芯材の体積減少により、繊維強化プラスチッ
ク部分の占める体積が多くなって、成形品の重量が増加
し、所望とする軽量化が達成された繊維強化プラスチッ
ク成形品が得られない。That is, the foam of the core material is crushed during molding, and the volume of the core material is reduced, so that the volume occupied by the fiber reinforced plastic portion is increased, and the weight of the molded product is increased, and the desired lightweight is obtained. A fiber-reinforced plastic molded product whose conversion has been achieved cannot be obtained.
【０００８】したがって、本発明は、発泡体を芯材と
し、軽量化を達成した繊維強化プラスチック成形品を提
供することを目的とする。Accordingly, an object of the present invention is to provide a fiber-reinforced plastic molded product which uses a foam as a core material and achieves weight reduction.
【０００９】[0009]
【課題を解決するための手段】本発明は、発泡体からな
る芯材を被覆材で被覆することに基づいて、成形中に芯
材の発泡体が押し潰されるのを防止して、軽量化の達成
された繊維強化プラスチックを提供し、上記目的を達成
したものである。SUMMARY OF THE INVENTION The present invention is based on covering a core material made of a foam with a covering material, thereby preventing the foam of the core material from being crushed during molding and reducing the weight. The present invention provides a fiber-reinforced plastic having achieved the above objects, and achieves the above object.
【００１０】本発明が完成するにいたった経過ならびに
上記構成にすることによって、成形中の芯材の発泡体の
潰れが防止され、所望とする軽量化が達成された繊維強
化プラスチック成形品が得られるようになる理由につい
て詳細に説明する。[0010] The progress of the present invention and the above-mentioned structure prevent the collapse of the foam of the core material during molding, and obtain a fiber-reinforced plastic molded article having a desired light weight. The reason why it becomes possible will be described in detail.
【００１１】まず、本発明者らは、成形中に発泡体が押
し潰される原因について検討したところ、次のことが判
明した。First, the present inventors have studied the causes of crushing of the foam during molding, and have found the following.
【００１２】最近の繊維強化プラスチック成形品では、
そのマトリクスを構成する樹脂として、リム（ＲＩＭ）
材料、特にリムナイロンが多く採用されている。In recent fiber-reinforced plastic moldings,
RIM (RIM)
Materials, especially rim nylon, are often used.
【００１３】このリム（ＲＩＭ）とは、反応射出成形の
ことで、具体的には２種類以上の低分子量かつ低粘度の
液状モノマーを圧力下にミキシングヘッド中で混合する
と同時に密閉金型に射出し、型内で重合反応を完結させ
て成形品を得る成形方法であり、成形温度が比較的低
く、かつ成形時間も短いという特徴を有している。The rim (RIM) is a reaction injection molding. Specifically, two or more kinds of low molecular weight and low viscosity liquid monomers are mixed in a mixing head under pressure and simultaneously injected into a closed mold. However, this is a molding method in which a polymerization reaction is completed in a mold to obtain a molded product, and has a characteristic that a molding temperature is relatively low and a molding time is short.
【００１４】ところが、このリムでは、その材料のモノ
マーが重合前に芯材の発泡体に接触して、発泡体を劣化
させ、その硬度を低下させ、その硬度低下によって、芯
材の発泡体が成形時の温度上昇（モノマーの重合による
発熱などによって温度が上昇する）とリム材料などの注
入圧により、押し潰されるのである。However, in this rim, the monomer of the material comes into contact with the foam of the core material before polymerization, deteriorating the foam and reducing its hardness. It is crushed by the temperature rise during molding (the temperature rises due to the heat generated by polymerization of the monomer) and the injection pressure of the rim material and the like.
【００１５】そして、その硬度低下による発泡体の潰れ
により、発泡体の体積が減少し、その分、繊維強化プラ
スチック部分の体積が増加して、繊維強化プラスチック
成形品の重量が増加し、所望とする軽量化が達成できな
くなる。The volume of the foam decreases due to the collapse of the foam due to the decrease in hardness, the volume of the fiber reinforced plastic portion increases accordingly, and the weight of the fiber reinforced plastic molded article increases. Weight reduction cannot be achieved.
【００１６】そこで、本発明では、芯材の発泡体を被覆
材で被覆することによって、リム材料のモノマーが発泡
体に接触して発泡体を劣化させるのを防止し、それによ
って発泡体の硬度低下を防止し、発泡体に設定通りの形
状、体積を保持させて、所望とする軽量化が達成された
繊維強化プラスチック成形品が得られるようにしたので
ある。Therefore, in the present invention, by covering the foam of the core material with the covering material, the monomer of the rim material is prevented from coming into contact with the foam and deteriorating the foam, whereby the hardness of the foam is improved. By preventing the reduction, the foam is kept in the shape and volume as set, so that a fiber-reinforced plastic molded product having a desired weight reduction can be obtained.
【００１７】また、芯材の発泡体がモノマーによって劣
化を受けることなく、所定の硬度や強度を保ち得るの
で、その周囲に形成される繊維強化プラスチック層を充
分に押圧することができ、その結果、繊維のずれが生じ
ず、また繊維含有率も増加して、得られる繊維強化プラ
スチック成形品の強度が向上する。Further, since the foam of the core material can maintain a predetermined hardness and strength without being deteriorated by the monomer, the fiber-reinforced plastic layer formed therearound can be sufficiently pressed, and as a result, In addition, the fiber does not shift and the fiber content is increased, so that the strength of the obtained fiber-reinforced plastic molded article is improved.
【００１８】上記被覆材としては、芯材の発泡体の形状
にそい、かつ発泡体に密着した状態で発泡体を被覆でき
るものが好ましく、そのような特性を備えた好適な被覆
材として、たとえば、ポリエチレン、ポリ塩化ビニル、
ポリプロピレン、セロハン、ポリアセテート、ポリエス
テル、ナイロン６、ナイロン６６、ポリカーボネート、
ポリアリレート、ポリスルホン、ポリイミド、ポリエー
テルスルホン、ポリエーテルエーテルケトン、ポリビニ
ルアルコール、ポリエチレンビニルアルコールなどが挙
げられる。もとより、これらに限定されるものではな
い。The above-mentioned coating material is preferably a material which conforms to the shape of the foam of the core material and is capable of coating the foam in a state in which it is in close contact with the foam. As a suitable coating material having such characteristics, for example, , Polyethylene, polyvinyl chloride,
Polypropylene, cellophane, polyacetate, polyester, nylon 6, nylon 66, polycarbonate,
Polyarylate, polysulfone, polyimide, polyether sulfone, polyether ether ketone, polyvinyl alcohol, etc. polyethylene vinyl alcohol is. Of course, it is not limited to these.
【００１９】これらの被覆材は、熱可塑性材料からな
り、たとえばフィルム状またはチューブ状にして使用す
るのが好ましい。These coatings are made of a thermoplastic material .
Ri, for example, preferably used in the film-like or tube-like.
【００２０】たとえば、熱可塑性材料からなる被覆材を
フィルムにし、該フィルムを芯材に重ね合わせ、その
後、超音波ウエルダーなどを使用して、該熱可塑性材料
のフィルムを加熱溶融して芯材の形状に合わせてシール
すると、被覆材が芯材に密着した状態のものが得られ、
被覆時の作業性が良いし、また性能面でも好適なものが
得られる。For example, a coating material made of a thermoplastic material is formed into a film, the film is overlaid on a core material, and thereafter, the film of the thermoplastic material is heated and melted by using an ultrasonic welder or the like to form a core material. When sealing according to the shape, the coating material is obtained in a state of being in close contact with the core material,
Workability at the time of coating is good, and a preferable thing in performance is obtained.
【００２１】すなわち、上記のように被覆材が密着状態
で芯材を被覆していると、繊維強化プラスチックのマト
リクスがリム材料で、そのモノマーの粘度が低かったと
しても、モノマーの芯材への流れ込みを防止することが
できる。これに対して、被覆材が被覆されていない部分
があったり、被覆材にピンホールがあると、それらの部
分からモノマーが被覆材の内部側に流入して、被覆効果
が低減する。[0021] That is, when the covering material as described above covers the core material in close contact, in matrix rim material fiber-reinforced plastics, even if the viscosity of the monomer is low, monomer to core material Can be prevented from flowing. On the other hand, if there is a portion that is not covered with the covering material or if there is a pinhole in the covering material, the monomer flows into the inside of the covering material from those portions, and the covering effect is reduced.
【００２３】芯材を被覆するときの被覆材の厚みは、薄
いものでよく、その厚みに関して特に限定されることは
ないが、通常４０μｍ以上であればよい。When coating the core material, the thickness of the coating material may be thin, and there is no particular limitation on the thickness, but it is usually 40 μm or more.
【００２４】また、芯材と被覆材との密着状態に関して
さらに説明すると、被覆材内容積をＶ１、芯材体積をＶ
２とするとき、その芯材体積占有率〔（Ｖ２／Ｖ１）×
１００〕を８０％以上にする。すなわち、この芯材体積
占有率が大きいということは、芯材と被覆材との密着状
態が良く、両者の間の隙間容積が小さいことを意味して
いる。もし、上記の芯材体積占有率が小さく、芯材と被
覆材との間の隙間容積が大きいと、繊維強化プラスチッ
ク成形品の成形時に、その隙間が熱膨張して被覆材が破
裂する。また、成形された繊維強化プラスチック成形品
が予定より周長が長くなるため、繊維強化プラスチック
成形品の端部が成形用金型にかみ込むことが生じる。な
お、上記の被覆材内容積とは被覆材で包囲された内側の
部分の容積をいい、芯材体積占有率とは上記の計算式か
らも明らかなように被覆材内容積中において芯材の体積
が占める比率をいう。Further, the state of close contact between the core material and the coating material will be further described. The inner volume of the coating material is V1, and the volume of the core material is V1.
2, the core material volume occupancy [(V2 / V1) ×
100] is 80% or more. That is, the fact that the core material volume occupancy is large means that the core material and the coating material are in good contact with each other and the gap volume between them is small. If the above-mentioned core material volume occupancy is small and the gap volume between the core material and the coating material is large, the gap is thermally expanded and the coating material bursts during molding of the fiber-reinforced plastic molded product. Further, since the formed fiber-reinforced plastic molded product has a longer circumference than expected, the end of the fiber-reinforced plastic molded product may bite into the molding die. In addition, the above-mentioned inner volume of the covering material refers to the volume of the inner portion surrounded by the covering material, and the core material volume occupancy is, as is clear from the above calculation formula, the core material volume in the covering material inner volume. The ratio occupied by volume.
【００２５】上記のような芯材と被覆材との間の隙間容
積が大きくなることを避けるためには、シールの際に被
覆材で包囲された内側の部分を減圧する方法や、繊維強
化プラスチックの注入前に型内で被覆材を芯材とともに
プレスし、シール部分のみ加熱してシールする方法など
を採用すればよい。[0025] In order to avoid a gap volume between the core and the coating material as described above is increased, and a method for reducing the enclosed inner portion with a coating material in the shea Lumpur, fibers Before the injection of the reinforced plastic, a method in which the coating material is pressed together with the core material in the mold, and only the sealing portion is heated and sealed may be adopted.
【００２６】発泡体の材質としては、たとえば、ポリス
チレン、ポリエチレン、ポリプロピレン、ポリウレタ
ン、ポリカーボネート、ＡＢＳなどが挙げられる。マト
リクスがリム材料の場合、その成形温度に合わせ、耐熱
性のあるものを採択することが好ましい。Examples of the material of the foam include polystyrene, polyethylene, polypropylene, polyurethane, polycarbonate, ABS and the like. When the matrix is a rim material, it is preferable to adopt a material having heat resistance in accordance with the molding temperature.
【００２７】繊維強化プラスチックに関して、繊維は、
この種の用途に使用可能なものは、いずれも本発明にお
いて使用することができる。With respect to fiber reinforced plastics, the fibers are:
Any that can be used for this type of application can be used in the present invention.
【００２８】また、繊維強化プラスチックのマトリクス
に関しては、リム材料が使用され、特にリムナイロンが
好適に使用されるが、本発明は、それらを使用するにあ
たって従来技術では解決できなかった問題点を解決して
いて、それらの材料を使用しやすくしている。[0028] With respect to the matrix of the fiber reinforced plastic, Trim material is used, in particular but rim nylon are preferably used, the present invention, in order to use them the problems that could not be solved by the prior art Settled, making those materials easier to use.
【００２９】[0029]
【実施例】つぎに、実施例を挙げて本発明をより具体的
に説明する。ただし、本発明はそれらの実施例のみに限
定されるものではない。Next, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to only these examples.
【００３０】実施例１ 比重０．０５のポリウレタン発泡体（９ｍｍ×１８ｍｍ
の断面略長方形状の発泡体）を芯材とし、その周囲をナ
イロン６６で被覆した。その被覆に際しては、厚み８０
μｍのナイロン６６フィルムを用い、芯材と被覆材との
密着状態を良くして芯材体積占有率を高めるために、ナ
イロン６６フィルムで包囲された内側の部分を減圧して
から、熱シールした。Example 1 A polyurethane foam having a specific gravity of 0.05 (9 mm × 18 mm
(A foam having a substantially rectangular cross section) was used as a core material, and the periphery thereof was covered with nylon 66. When covering, the thickness 80
In order to improve the close contact between the core material and the coating material and to increase the core material volume occupancy using a nylon 66 film of μm, the inner part surrounded by the nylon 66 film was decompressed and then heat-sealed. .
【００３１】そして、金型を用い、上記のナイロン６６
で被覆されたポリウレタン発泡体の周囲に繊維強化プラ
スチック層を形成して、ラケットフレームのヨークを作
製した。Then, using a mold, the above nylon 66
A fiber reinforced plastic layer was formed around the polyurethane foam covered with the above to prepare a yoke for a racket frame.
【００３２】発泡体の作製には、ポリオール成分として
ハイプロックスＲＰ−４７６０（商品名、大日本インキ
化学工業社製）を用い、ポリイソシアネート成分として
はハイプロックスＳＰ−２９４（商品名、大日本インキ
化学工業社製）を用いた。In preparing the foam, Hyprox RP-4760 (trade name, manufactured by Dainippon Ink and Chemicals, Inc.) was used as a polyol component, and Hyprox SP-294 (trade name, manufactured by Dainippon Ink and Chemicals, Inc.) was used as a polyisocyanate component. Chemical Industry Co., Ltd.) was used.
【００３３】繊維強化プラスチックのマトリクスはリム
ナイロンであり、これには宇部興産社製のＵＸ−７５
（商品名）を使用し、強化用の繊維には東邦レーヨン社
製のベスファイトカーボングレイドＢＣ−７６６４−２
４（２０）（商品名）を用いた。成形にあたっての金型
温度は１５０℃であり、注入時のモノマーの温度は９０
℃であった。The matrix of the fiber reinforced plastic is rim nylon, which includes UX-75 manufactured by Ube Industries.
(Trade name), and the reinforcing fiber is Vesfite Carbon Grade BC-7664-2 manufactured by Toho Rayon Co., Ltd.
4 (20) (trade name) was used. The mold temperature during molding was 150 ° C., and the temperature of the monomer during injection was 90 ° C.
° C.
【００３５】比較例１ 芯材となるポリウレタン発泡体をナイロン６６で被覆す
る際に、芯材への密着状態を高めるための操作をするこ
となく被覆を行ったほかは、実施例１と同様にして、ラ
ケットフレームのヨークを作製した。Comparative Example 1 The same procedure as in Example 1 was carried out except that when the polyurethane foam as the core material was coated with nylon 66, the coating was carried out without performing an operation for increasing the adhesion to the core material. Thus, a yoke for a racket frame was produced.
【００３６】比較例２ 芯材となるポリウレタン発泡体の両側端を除いて、ナイ
ロン６６で被覆したほかは、実施例１と同様にして、ラ
ケットフレームのヨークを作製した。Comparative Example 2 A yoke for a racket frame was produced in the same manner as in Example 1 except that the polyurethane foam as a core material was covered with nylon 66 except for both ends.
【００３７】比較例３ ポリウレタン発泡体を被覆材で被覆することなく、その
まま芯材として用いたほかは、実施例１と同様にして、
ラケットフレームのヨークを作製した。Comparative Example 3 The procedure of Example 1 was repeated except that the polyurethane foam was used as a core without being covered with a coating material.
A racket frame yoke was manufactured.
【００３８】得られたラケットフレームのヨークの単位
長さ当たりの重量、強度および硬度を測定した。The weight, strength and hardness per unit length of the yoke of the obtained racket frame were measured.
【００３９】上記の単位長さ当たりの重量とは、成形品
（芯材＋被覆材＋繊維強化プラスチック）の１ｍｍ当た
りの重量（ｇ／ｍｍ）を意味する。The above-mentioned weight per unit length means the weight (g / mm) per 1 mm of the molded product (core material + coating material + fiber reinforced plastic).
【００４０】強度は成形品（ラケットフレームのヨー
ク）に６．５ｍｍ間隔（中心間の間隔）で直径４．３ｍ
ｍの穴をドリルであけ、その穴に１．３ｍｍのワイヤー
をＵ字状になるように通し、ワイヤーの両端を５０ｍｍ
／分の引張速度で引張り、ワイヤーが成形品を引き抜く
際の荷重を測定したものである。The strength of the molded product (yoke of the racket frame) is 4.3 mm at intervals of 6.5 mm (interval between centers).
m, drill a 1.3 mm wire through the hole so as to form a U-shape.
The load is measured when the wire is pulled out of the molded product by pulling at a pulling rate of / min.
【００４１】硬度は成形前と成形後の芯材（発泡体）の
断面部の硬度をＪＩＳ−Ａ型硬度計により測定したもの
である。The hardness is a value obtained by measuring the hardness of the cross section of the core material (foam) before and after molding with a JIS-A type hardness meter.
【００４２】上記のようにして作製された実施例１およ
び比較例１〜３のラケットフレームのヨーク（繊維強化
プラスチック成形品）について、芯材として使用した発
泡体の種類、その比重、被覆材の種類、芯材体積占有率
（被覆材で包囲された内側の部分の容積中において芯材
の体積が占める比率）を表１に示し、使用したマトリク
スの種類、測定した単位長さ当たりの重量、強度、硬度
を表２に示す。なお、スペース上の関係で、表２には、
単位長さ当たりの重量を単に「重量」で表示する。[0042] For the above manner fabricated Example 1 Contact good <br/> beauty Comparative Examples 1 to 3 of the racket frame of the yoke (fiber-reinforced plastic molded article), the type of foam used as the core material, Table 1 shows the specific gravity, the type of the coating material, and the core material volume occupancy ratio (the ratio of the volume of the core material to the volume of the inner portion surrounded by the coating material). Table 2 shows the weight per unit length, strength, and hardness. In addition, due to space limitations, Table 2 shows that
The weight per unit length is simply indicated by “weight”.
【００４３】[0043]
【表１】 [Table 1]
【００４４】[0044]
【表２】 [Table 2]
【００４５】表２に示すように、実施例１は、芯材を被
覆していない比較例３に比べて、単位長さ当たりの重量
が少なく、軽量化が達成されており、かつ強度も大きか
った。As shown in Table 2, in Example 1 , the weight per unit length was reduced, the weight was reduced, and the strength was large as compared with Comparative Example 3 in which the core material was not coated. Was.
【００４６】また、芯材を被覆したものの中で比較する
と、芯材体積占有率が高い実施例１は、比較例１〜２よ
り、単位長さ当たりの重量が少なく、かつ強度が大き
く、より軽量化が達成され、かつ高強度であった。In comparison with those coated with a core material, Example 1 having a higher core volume occupancy ratio has a smaller weight per unit length and a higher strength than Comparative Examples 1 and 2. Light weight was achieved and the strength was high.
【００４７】これは、実施例１では、芯材体積占有率が
高く、芯材と被覆材との密着状態が良かったので、成形
中に芯材がモノマーによって劣化を受けることなく、そ
の成形後の硬度が成形前より増加していたが、芯材体積
占有率の低い比較例１や芯材の両端を被覆していない比
較例２は、芯材の成形後の硬度が成形前より低くなって
いることからもわかるように、成形中に芯材がモノマー
によって一部劣化を受けたためであると考えられる。[0047] This is because, in the first embodiment, high core volume fraction, the contact state between the core and the coating material was good, without core is subjected to deterioration by monomer during molding, the molding Although the hardness after molding was higher than that before molding, Comparative Example 1 in which the core material volume occupancy ratio was low and Comparative Example 2 in which both ends of the core material were not covered, the hardness after molding of the core material was lower than that before molding. As can be seen from the above, it is considered that the reason is that the core material was partially deteriorated by the monomer during molding.
【００４８】実施例２ 比重０．０４のポリスチレン発泡体（直径１５ｍｍの円
柱状発泡体）を芯材とし、その周囲をポリエチレンで被
覆し、その周囲に繊維強化プラスチック層を形成して、
丸型パイプを作製した。Example 2 A polystyrene foam having a specific gravity of 0.04 (a cylindrical foam having a diameter of 15 mm) was used as a core material, the periphery thereof was covered with polyethylene, and a fiber-reinforced plastic layer was formed around the periphery.
A round pipe was made.
【００４９】上記ポリスチレン発泡体へのポリエチレン
の被覆に際しては、厚み５０μｍのポリエチレンフィル
ムを用い、ポリエチレンフィルムで包囲された内側の部
分を減圧してから、熱シールした。When coating the above-mentioned polystyrene foam with polyethylene, a polyethylene film having a thickness of 50 μm was used, and the inner part surrounded by the polyethylene film was decompressed and then heat-sealed.
【００５０】繊維強化プラスチックのマトリクスはジシ
クロペンタジエン〔帝人ハーキュレス社製メトン（商品
名）〕であり、強化用の繊維は実施例１の場合と同様に
東邦レーヨン社製のベスファイトカーボンブレイドＢＣ
−７６６４−２４（２０）（商品名）である。そして、
成形にあたっての金型温度は６０℃であり、注入時のモ
ノマーの温度は２５℃であった。The matrix of the fiber-reinforced plastic is dicyclopentadiene (Meton (trade name) manufactured by Teijin Hercules), and the reinforcing fibers are Vesfite Carbon Blade BC manufactured by Toho Rayon Co., as in Example 1.
-7664-24 (20) (trade name). And
The mold temperature during molding was 60 ° C, and the temperature of the monomer at the time of injection was 25 ° C.
【００５１】比較例４ ポリスチレン発泡体を被覆材で被覆することなく、その
まま芯材として用いたほかは、実施例２と同様にして、
丸型パイプを作製した。Comparative Example 4 The procedure of Example 2 was repeated except that the polystyrene foam was used as a core without being covered with a coating material.
A round pipe was made.
【００５２】得られた実施例２および比較例４の丸型パ
イプについて、単位長さ当たりの重量、強度および硬度
を前記実施例１と同様に測定した。The obtained round pipes of Example 2 and Comparative Example 4 were measured for weight per unit length, strength and hardness in the same manner as in Example 1.
【００５３】これらの丸型パイプについて、その成形に
あたって芯材として使用した発泡体の種類、その比重、
被覆材の種類、芯材体積占有率を表３に、使用したマト
リクスの種類、測定した単位長さ当たりの重量、強度、
硬度を表４に示す。Regarding these round pipes, the type of foam used as a core material in the molding thereof, its specific gravity,
Table 3 shows the type of coating material and the core material volume occupancy, the type of matrix used, the measured weight per unit length, strength,
The hardness is shown in Table 4.
【００５４】[0054]
【表３】 [Table 3]
【００５５】[0055]
【表４】 [Table 4]
【００５６】表４に示すように、実施例２は、芯材を被
覆していない比較例４に比べて、単位長さ当たりの重量
（表４では、単に「重量」と表示）が少なく、かつ強度
が大きかった。As shown in Table 4, in Example 2 , the weight per unit length (in Table 4, simply indicated as "weight") was smaller than in Comparative Example 4 in which the core material was not coated. And the strength was great.
【００５７】[0057]
【発明の効果】以上説明したように、本発明によれば、
軽量化が達成された繊維強化プラスチック成形品を提供
することができる。また、本発明の繊維強化プラスチッ
ク成形品は強度が大きい。As described above, according to the present invention,
It is possible to provide a fiber-reinforced plastic molded product whose weight has been reduced. Further, the fiber-reinforced plastic molded product of the present invention has high strength.
Claims (3)
覆する被覆材と、被覆材の周囲に形成される繊維強化プ
ラスチック層を有し、かつ被覆材が熱可塑性材料からな
り、繊維強化プラスチックのマトリクスがリム材料であ
る繊維強化プラスチック成形品の製造方法であって、芯
材を被覆材で被覆した後、被覆材で包囲された内側の部
分を減圧してから被覆材を加熱溶融してシールし、被覆
材内容積をＶ１、芯材容積をＶ２とするとき、その芯材
体積占有率〔（Ｖ２／Ｖ１）×１００〕が８０％以上の
被覆芯材を作製し、その後、上記被覆芯材の周囲に金型
を用いて繊維強化プラスチック層を形成することを特徴
とする、発泡体を芯材とする繊維強化プラスチック成形
品の製造方法。 1. A core material made of a foam, and a periphery of the core material is covered.
A covering material to be covered and a fiber reinforced plastic formed around the covering material.
It has a plastic layer and the coating material is made of a thermoplastic material.
The fiber reinforced plastic matrix is a rim material
A method for producing a fiber-reinforced plastic molded article, comprising:
After covering the material with the covering material, the inner part surrounded by the covering material
After reducing the pressure, heat and melt the coating material to seal it,
When the internal volume is V1 and the core volume is V2, the core
Volume occupancy [(V2 / V1) × 100] of 80% or more
Prepare a coated core, and then mold around the coated core
Characterized by forming a fiber reinforced plastic layer using
Fiber reinforced plastic molding with foam as core material
Product manufacturing method.
記載の繊維強化プラスチック成形品の製造方法。2. The rim material is rim nylon.
A method for producing the fiber-reinforced plastic molded article according to the above .
１または２記載の繊維強化プラスチック成形品の製造方
法。3. The method for producing a fiber-reinforced plastic molded product according to claim 1, wherein the core material is a polyurethane foam.
Law .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5353234A JP2826059B2 (en) | 1993-12-28 | 1993-12-28 | Method for producing fiber-reinforced plastic molded article using foam as core material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5353234A JP2826059B2 (en) | 1993-12-28 | 1993-12-28 | Method for producing fiber-reinforced plastic molded article using foam as core material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07195602A JPH07195602A (en) | 1995-08-01 |
| JP2826059B2 true JP2826059B2 (en) | 1998-11-18 |
Family
ID=18429466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5353234A Expired - Fee Related JP2826059B2 (en) | 1993-12-28 | 1993-12-28 | Method for producing fiber-reinforced plastic molded article using foam as core material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2826059B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012062684A1 (en) | 2010-11-12 | 2012-05-18 | Basf Se | Composite component comprising a polymer phase and a foamed phase, and method for producing same |
| US9427900B2 (en) | 2010-11-12 | 2016-08-30 | Basf Se | Composite component comprising a polymer phase and a foamed phase, and processes for producing the same |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4529371B2 (en) * | 2003-04-22 | 2010-08-25 | 東レ株式会社 | Foamed resin core built-in FRP and method for manufacturing the same |
| CN105082690A (en) * | 2014-04-29 | 2015-11-25 | 赢创特种化学（上海）有限公司 | Fiber-reinforced thermoplastic composite material member containing foam core layer and preparation method thereof |
| JP6582429B2 (en) * | 2015-02-09 | 2019-10-02 | 日産自動車株式会社 | Sandwich molded body, molding method thereof and molding apparatus |
| EP3196007A1 (en) * | 2016-01-21 | 2017-07-26 | Autoneum Management AG | Moulded trim part for a vehicle |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55278A (en) * | 1979-03-29 | 1980-01-05 | Sekisui Plastics Co Ltd | Synthetic resin form and production thereof |
| JPH05318643A (en) * | 1992-05-22 | 1993-12-03 | Nippon Oil Co Ltd | Composite material and its manufacture |
| JP2597797B2 (en) * | 1993-01-18 | 1997-04-09 | 住友ゴム工業 株式会社 | Fiber reinforced plastic products |
-
1993
- 1993-12-28 JP JP5353234A patent/JP2826059B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012062684A1 (en) | 2010-11-12 | 2012-05-18 | Basf Se | Composite component comprising a polymer phase and a foamed phase, and method for producing same |
| US9427900B2 (en) | 2010-11-12 | 2016-08-30 | Basf Se | Composite component comprising a polymer phase and a foamed phase, and processes for producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07195602A (en) | 1995-08-01 |
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