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    • 2. 发明申请
    • NEAR NET SHAPE PREPREG
    • 近网形式PREPREG
    • WO2004058471A1
    • 2004-07-15
    • PCT/US2003/040824
    • 2003-12-19
    • DOW GLOBAL TECHNOLOGIES INC.BARRON, James, H.SHAFI, Muhammad, AsjadBANK, David, H.OELBERG, James, D.DION, Robert, P.
    • BARRON, James, H.SHAFI, Muhammad, AsjadBANK, David, H.OELBERG, James, D.DION, Robert, P.
    • B29B11/16
    • B29C70/46B29C70/305
    • A process for producing 2-dimensional and 3-dimensional near net shape prepregs suitable for use in preparing structural composite parts of complex shape, including (a) depositing at least 13 volume percent of reinforcing fibers onto one side of a foraminous screen having a vacuum means positioned on the opposite side thereof which maintains the fibers in position on the one side of the screen, (b) depositing resin matrix material onto the same side of the foraminous screen as the reinforcing fibers above wherein the vacuum means positioned on the opposite side of the foraminous screen maintains the resin matrix material with the fibers in position on the one side of the screen, (c) heating the resin matrix material sufficiently to bond resin matrix material to the fiber at the surface of the screen, and (d) allowing the resin and fiber structure to cool such that a near net prepreg is formed. The prepreg is placed in a compression mold; and heated and consolidated to produce a uniform composite part.
    • 一种适用于制备复杂形状的结构复合部件的二维和三维近净形状预浸料的方法,包括(a)将至少13体积%的增强纤维沉积到具有真空的有孔筛网的一侧上 位于其相对侧的装置,其将纤维保持在屏幕一侧的适当位置,(b)将树脂基质材料沉积在与上述增强纤维相同的多孔筛网侧,其中真空装置位于相对侧 (c)将树脂基体材料充分加热以将树脂基体材料粘结在屏幕表面的纤维上,(d)在该筛网的表面上, 使树脂和纤维结构体冷却,形成近净预浸料。 将预浸料放置在压模中; 并加热固结,制成均匀的复合部件。