公开(公告)号：US20020009935A1

公开(公告)日：2002-01-24

申请号：US09876310

申请日：2001-06-07

Applicant: Hexcel Corporation

Inventor： Hao-Ming Hsiao ,  Shaw Ming Lee ,  Robert Albert Buyny ,  Cary Joseph Martin

IPC: B29D022/00 ,  B65D001/00

CPC classification number: D03D15/00 ,  B29C70/22 ,  B32B5/12 ,  B32B27/04 ,  C08J5/24 ,  C08J2363/00 ,  D03D9/00 ,  D03D15/0011 ,  D03D15/0083 ,  D10B2101/06 ,  D10B2101/12 ,  D10B2331/021 ,  D10B2401/063 ,  D10B2505/02 ,  Y10T428/1362 ,  Y10T428/1376 ,  Y10T428/24149 ,  Y10T428/24174 ,  Y10T428/24421 ,  Y10T428/24669 ,  Y10T428/24909 ,  Y10T428/2907 ,  Y10T428/2915 ,  Y10T442/2738 ,  Y10T442/2984 ,  Y10T442/30 ,  Y10T442/3114 ,  Y10T442/322

Abstract: A core crush resistant prepreg for use in making a fiber reinforced composite panel structure is provided. The prepreg comprises a woven fabric consisting essentially of carbon fiber tow strands impregnated with a hardenable polymeric resin composition. Typically the fabric has an areal weight of from about 180 to about 205 grams per square meter. The prepreg has an average fiber tow aspect ratio of less than about 15.4, a prepreg thickness of at least about 0.245 mm, and a prepreg openness of at least about 1.2 percent but less than about 6.0 percent. Preferably, the resin composition is predominantly viscous in nature and has a tan null value of between 0.9 and 2.0 at an elevated temperature between 70null C. and 140null C., and an average epoxy functionality of greater than 2.0. A method for evaluating core crush resistance properties of a prepreg is also provided. The method includes determining a fiber tow average aspect ratio of the prepreg, determining a prepreg thickness, and comparing said average fiber tow aspect ratio and prepreg thickness to a set of predetermined values.

公开(公告)号：US20010046600A1

公开(公告)日：2001-11-29

申请号：US09726940

申请日：2000-11-30

Applicant: HEXCEL CORPORATION

Inventor： Hao-Ming Hsiao ,  Shaw Ming Lee ,  Robert Albert Buyny ,  Cary Joseph Martin

IPC: B32B001/00 ,  D06N007/04 ,  B32B003/28 ,  B32B003/30 ,  D03D015/00 ,  D03D025/00 ,  D02G003/00 ,  D04H001/00

CPC classification number: D03D15/00 ,  B29C70/22 ,  B32B5/12 ,  B32B27/04 ,  C08J5/24 ,  C08J2363/00 ,  D03D9/00 ,  D03D15/0011 ,  D03D15/0083 ,  D10B2101/06 ,  D10B2101/12 ,  D10B2331/021 ,  D10B2401/063 ,  D10B2505/02 ,  Y10T428/1362 ,  Y10T428/1376 ,  Y10T428/24149 ,  Y10T428/24174 ,  Y10T428/24421 ,  Y10T428/24669 ,  Y10T428/24909 ,  Y10T428/2907 ,  Y10T428/2915 ,  Y10T442/2738 ,  Y10T442/2984 ,  Y10T442/30 ,  Y10T442/3114 ,  Y10T442/322

Abstract: A core crush resistant prepreg for use in making a fiber reinforced composite panel structure is provided. The prepreg comprises a woven fabric consisting essentially of carbon fiber tow strands impregnated with a hardenable polymeric resin composition. Typically the fabric has an areal weight of from about 180 to about 205 grams per square meter. The prepreg has an average fiber tow aspect ratio of less than about 15.4, a prepreg thickness of at least about 0.245 mm, and a prepreg openness of at least about 1.2 percent but less than about 6.0 percent. Preferably, the resin composition is predominantly viscous in nature and has a tan null value of between 0.9 and 2.0 at an elevated temperature between 70null C. and 140null C., and an average epoxy functionality of greater than 2.0. A method for evaluating core crush resistance properties of a prepreg is also provided. The method includes determining a fiber tow average aspect ratio of the prepreg, determining a prepreg thickness, and comparing said average fiber tow aspect ratio and prepreg thickness to a set of predetermined values.

Abstract translation: 提供了一种用于制造纤维增强复合板结构的芯抗压预浸料。 预浸料包括基本上由浸渍有可硬化聚合物树脂组合物的碳纤维丝束组成的机织织物。 通常，织物的面积重量为约180至约205克/平方米。 预浸料坯的平均纤维束纵横比小于约15.4，预浸料坯厚度至少约0.245mm，预浸料坯开度至少约为1.2％但小于约6.0％。 优选地，树脂组合物本质上主要是粘性的，并且在70℃和140℃之间的升高的温度下具有在0.9和2.0之间的tanδ值，并且平均环氧官能度大于2.0。 还提供了一种用于评估预浸料坯的耐芯击抗性的方法。 该方法包括确定预浸料坯的纤维束平均纵横比，确定预浸料坯厚度，以及将所述平均纤维束纵横比和预浸料坯厚度与一组预定值进行比较。