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    Method for making preforms
    2.
    发明授权
    Method for making preforms 失效
    制作预制件的方法

    公开(公告)号：US6030575A

    公开(公告)日：2000-02-29

    申请号：US754608

    申请日：1996-11-20

    申请人： James H. Barron ,  James Entringer ,  Randy S. Moore

    发明人： James H. Barron ,  James Entringer ,  Randy S. Moore

    IPC分类号： B29B11/16 ,  B29B15/12 ,  D04H1/60 ,  B27N3/04 ,  B29C70/12

    CPC分类号： B29B11/16 ,  D04H1/60 ,  B29B15/12 ,  B29B2911/14593

    摘要： An improvement in the preparation of fiber preforms in which binder and fibers are dispersed to contact on vacuum-supplied screens is disclosed, comprising particularly (a) selecting a particulate binder material which is solid at 25.degree. C; (b) heating the binder material, during initial contact with the fibers, to a viscosity and for a time which is the same as or proportional to 1,000 centipoise for one second; and (c) dispersing the binder material and the fibers such that the preform exhibits a variation in the ratio of fibers and binder which correlates to a coefficient of variation which is less than or equal to about 5 percent. The resulting preform shows superior compaction and uniformity of constitution even when it is prepared in sections or in asymmetric configurations. A wide variety of binders can be used, including thermoplastic and thermoset polymers, glasses, ceramics, metals, and the like, and the binder can also be selected from multi-component systems which are reactive with one another, such as epoxy-based systems, and/or reactive with a resin impregnant which may be subsequently introduced. In an alternative embodiment the preforms can be heated and pressed to make final composite articles, with or without direct application of a molding resin.

    摘要翻译： 公开了在真空供应的筛网中分散粘合剂和纤维以接触的纤维预成型体的制备的改进，其特别包括（a）选择在25℃下为固体的颗粒状粘合剂材料; （b）在与纤维初次接触期间将粘合剂材料加热至粘度，并且与1,000厘泊相同或成比例的时间为1秒; 和（c）分散粘合剂材料和纤维，使得预成型件显示与小于或等于约5％的变异系数相关的纤维和粘合剂的比例的变化。 所得到的预成型体即使在以部分或非对称构型制备时也显示出优异的压实性和均匀性。 可以使用各种各样的粘合剂，包括热塑性和热固性聚合物，玻璃，陶瓷，金属等，并且粘合剂也可以选自彼此反应的多组分体系，例如环氧系统 ，和/或与可以随后引入的树脂浸渍剂反应。 在替代实施例中，可以加热和压制预制件以制造最终的复合制品，在或不直接施加模制树脂的情况下。

    Process for preparing a resin matrix composite using a preform
    3.
    发明授权
    Process for preparing a resin matrix composite using a preform 失效
    使用预制件制备树脂基质复合材料的方法

    公开(公告)号：US5766534A

    公开(公告)日：1998-06-16

    申请号：US702193

    申请日：1996-08-23

    申请人： Warren D. White ,  James H. Barron ,  Johnny P. Gendreau

    发明人： Warren D. White ,  James H. Barron ,  Johnny P. Gendreau

    IPC分类号： B29B11/16 ,  B29C70/48 ,  B29C70/54 ,  B29K101/10 ,  B29K105/06 ,  C08J5/06 ,  B29B11/12 ,  B29C45/02

    CPC分类号： C08J5/06 ,  B29B11/16 ,  B29C70/48 ,  B29C70/543 ,  B29K2063/00 ,  B29K2079/00 ,  B29K2105/243

    摘要： A process for preparing a matrix resin composite contains the steps of: (1) preparing a preform containing multiple layer of reinforcing material and a crosslinkable tackifier by (a) applying the tackifier onto the reinforcing material, (b) compressing the layers of reinforcing material and partially crosslinking the tackifier under a pressure sufficient to compact the tackified, reinforcing layers to a volume which is less than their volume in the finished composite part and in a manner such that at least one surface of each of the reinforcing layers is or will be, during partially crosslinking, in direct contact with the tackifier, and (2) contacting the preform with a matrix resin.

    摘要翻译： 制备基质树脂复合材料的方法包括以下步骤：（1）通过（a）将增粘剂施加到增强材料上，制备包含多层增强材料的预成型体和可交联增粘剂，（b）将增强材料层 并且在足以将增粘的层压缩成在成品复合材料部分中的体积小于其体积的体积的压力下部分地交联增粘剂，并且使得每个加强层的至少一个表面是或将是 在部分交联期间，与增粘剂直接接触，和（2）使预型体与基质树脂接触。