REINFORCING FIBER BASE MATERIAL AND PREFORM

To provide a fiber base material and a preform which are suitable for molding FRP by RTM, are excellent in shaping property and can suppress un-impregnation of matrix resin and resin richness.SOLUTION: In a fiber base material used for molding FRP by RTM molding, a fiber base material 1 of the prese...

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Hauptverfasser:	SAITO JOJI, UZAWA KIYOSHI, SOKAWA TAKEO, ISHIDA OSUKE, ASAI KIYOTSUGU, MORI DAISUKE, SAITO YOSHIHIRO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BRAIDING COTTON-WOOL FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS KNITTING LACE-MAKING MAKING GRANULES OR PREFORMS MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL NON-WOVEN FABRICS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TEXTILES TRANSPORTING TRIMMINGS WADDING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	To provide a fiber base material and a preform which are suitable for molding FRP by RTM, are excellent in shaping property and can suppress un-impregnation of matrix resin and resin richness.SOLUTION: In a fiber base material used for molding FRP by RTM molding, a fiber base material 1 of the present invention has a chopped sheet 10 made of a temporarily fixed bundle 11 of discontinuous fiber arranged in one direction and laminated so that a fiber direction thereof is random, and a cushioning material 20 having resin permeability. And the cushioning material is disposed on a back side of the chopped sheet. By using an elasticity of the cushioning material to relieve an overcrowded lamination part of the chopped sheet and to cover a depopulated lamination part, a phenomenon that a matrix resin does not spread or become rich in the FRP molded article can be prevented.SELECTED DRAWING: Figure 1 【課題】RTMによるFRPの成形に適しており、賦形性に優れ、マトリックス樹脂の未含浸や樹脂リッチを抑えることができる繊維基材及びプリフォームを提供する。【解決手段】本発明の繊維基材1は、RTM成形によるFRPの成形に使用する繊維基材において、一方向に配列した不連続繊維の束11が、その繊維方向がランダムになるように積層された状態で仮固定されて成るチョップドシート10と、樹脂透過性を有するクッション材20とを備えており、前記クッション材が前記チョップドシートの裏面側に配置されることを特徴とする。クッション材の弾性を利用してチョップドシートの過密な積層部分を緩和し、又、過疎な積層部分をカバーすることで、FRPの成形品においてマトリックス樹脂が行き渡らなかったり、樹脂リッチになったりする現象を防止できる。【選択図】図１