公开(公告)号：WO1992022509A1

公开(公告)日：1992-12-23

申请号：PCT/US1992005044

申请日：1992-06-10

Applicant: HEXCEL CORPORATION

Inventor： HEXCEL CORPORATION ,  HAN, Jong, Hoon

IPC: C08L33/04

CPC classification number: C04B35/63404 ,  C04B35/634 ,  C04B35/63424 ,  C04B35/63448 ,  C08K5/0025 ,  C08K5/103 ,  C08L33/12

Abstract: Ceramic binder compositions used in ceramic formulations for molding ceramic parts are disclosed. The ceramic binder compositions are solutions of at least one polymer, at least one reactive monomer, solvent, and initiator. When the ceramic binder solutions are combined with ceramic raw materials, the resulting ceramic formulations have exceptional tack and drape properties which make them useful for molding large and intricately shaped three dimensional ceramic green parts. The green parts can be set using conventional polymeric processing techniques and have improved strengths.

Abstract translation: 公开了用于模制陶瓷部件的陶瓷配方中使用的陶瓷粘合剂组合物。 陶瓷粘合剂组合物是至少一种聚合物，至少一种反应性单体，溶剂和引发剂的溶液。 当陶瓷粘合剂溶液与陶瓷原料结合时，所得到的陶瓷配方具有卓越的粘性和悬垂性能，使其可用于模制大而复杂的三维陶瓷绿色部件。 绿色部件可以使用常规聚合物加工技术设置并具有改进的强度。

公开(公告)号：WO1991000850A1

公开(公告)日：1991-01-24

申请号：PCT/US1990003690

申请日：1990-07-05

Applicant: HEXCEL CORPORATION

Inventor： HEXCEL CORPORATION ,  HEGEDUS, Andreas, G.

IPC: C04B38/06

CPC classification number: C04B38/063 ,  C04B2111/00612 ,  C04B2111/00793 ,  C04B2111/0081 ,  Y10S264/19 ,  C04B35/10 ,  C04B38/0051 ,  C04B38/065 ,  C04B38/067 ,  C04B40/0071 ,  C04B40/0082 ,  C04B38/068

Abstract: A ceramic body of controlled porosity is formed by coating unidirectional fiber carriers with a hardenable liquid resin bearing powdered ceramic material, which resin is subsequently cured, hardened, or cooled to provide a green body which may be assembled with similar layers, in a desired shape, and subsequently sintered, to form a ceramic body having continuous pores corresponding to the position of the fibers.

公开(公告)号：US20250163226A1

公开(公告)日：2025-05-22

申请号：US18512268

申请日：2023-11-17

Applicant: Hexcel Corporation

Inventor： David Grulke ,  Emily Thomsen

IPC: C08J3/00 ,  B29C64/153 ,  B29K71/00

Abstract: A method of preparing a polymer powder composition suitable for selective laser sintering and a powder composition obtained from the same. The polymer composition comprising at least two polyetherketoneketone polymorphs, each of the polymorphs having a different melting peak in a melting temperature range. The polymer is heated at a temperature below the lowest of the polymorphs melting peaks thereby decreasing the melting temperature range of the polymer composition. The treatment is especially useful with Cake B PEKK powder, which is otherwise unusable in SLS. Parts built from the treated powder using SLS have reduced surface anomalies and are easier to remove from the Cake bed.

公开(公告)号：US11255763B2

公开(公告)日：2022-02-22

申请号：US16682762

申请日：2019-11-13

Applicant: Hexcel Corporation

Inventor： Whitney Kline ,  Alden Winn

IPC: G01N3/08 ,  B29C64/153 ,  B29L31/40 ,  G06K19/06 ,  G01N3/02 ,  G06K1/12 ,  B29C64/393 ,  B33Y80/00 ,  B33Y70/00

Abstract: A system and method for identifying test bars formed during a selective laser sintering build. A part cake is formed during a selective laser sintering build. The part cake comprises parts formed from a powder by selective laser sintering and unsintered powder around the formed parts. The parts include test bars for performing material testing. Each test bar includes a plurality of indentations in a first grip section and a second grip section. The plurality of indentations are arranged in a information providing pattern that is adapted to be readable after the test part is removed from the part cake.

公开(公告)号：US11247391B2

公开(公告)日：2022-02-15

申请号：US16727474

申请日：2019-12-26

Applicant: Hexcel Corporation

Inventor： Scott DeFelice ,  Anthony DeCarmine

IPC: B29C64/153 ,  C08G65/40 ,  B33Y70/00 ,  B33Y10/00 ,  B29C67/04 ,  B29C64/357 ,  B33Y40/00 ,  B29K71/00 ,  B29K105/26 ,  B29C35/08

Abstract: A process for manufacturing a three-dimensional object from a powder by selective sintering the powder using electromagnetic radiation. The powder includes recycled PAEK. In one embodiment, the powder includes recycled PEKK. In one embodiment, the powder includes first recycle PEKK and second recycle PEKK. In one embodiment, the powder consists essentially of recycled PEKK. The process may include the step of maintaining a bed of a selective laser sintering machine at approximately 300 degrees Celsius and applying a layer of the powder to the bed. The average in-plane tensile strength of the three-dimensional object is greater than that of a three-dimension object manufactured by selective sintering using a powder including an unused PEKK powder.

公开(公告)号：US11161967B2

公开(公告)日：2021-11-02

申请号：US16778721

申请日：2020-01-31

Applicant: Hexcel Corporation

Inventor： Whitney Kline ,  Lawrence Varholak

IPC: C08K7/06 ,  B33Y70/00 ,  B29B9/02 ,  B33Y30/00

Abstract: A powder composition suitable for use in selective laser sintering for printing an object. The powder composition includes a first fraction including a plurality of polyaryletherketone (PAEK) particles having a mean diameter less than 30 microns, a second fraction having a plurality of polyaryletherketone (PAEK) particles having a mean diameter greater than 30 microns, and a third fraction having a plurality of carbon fibers. The first fraction and the second fraction are formed by an air classification separation performed on a pulverized powder. After the separation, the first fraction, the second fraction, and the third fraction are blended in a high intensity mixer. The powder composition when used in selective laser sinter results in parts with increased tensile strength and reduced surface roughness, among other improvements, as compared to similar powders omitting the first fraction. The PAEK may include polyetherketoneketone (PEKK).

公开(公告)号：US11123899B2

公开(公告)日：2021-09-21

申请号：US16386538

申请日：2019-04-17

Applicant: Hexcel Corporation

Inventor： Mark Gerdisch ,  Richard Callis ,  Adam Senta

IPC: B29C33/38 ,  B29C70/30 ,  B29C33/30 ,  B29C33/40 ,  B29K79/00 ,  B29K105/08 ,  B29K307/04 ,  B29L31/00

Abstract: Method for seaming a multi-sectional composite tooling for use in molding large composite structures. The tooling includes at least two tooling sections that are made from quasi-isotropic sheet molding compound. The two tooling sections are seamed together with a scarf plug at the tooling surface. The scarf plug is composed of specially oriented layers of consolidated quasi-isotropic sheet molding compound. The scarf plug is made from the same type of quasi-isotropic sheet molding compound that is used to make the tooling sections.

公开(公告)号：US20210142774A1

公开(公告)日：2021-05-13

申请号：US16681149

申请日：2019-11-12

Applicant: Hexcel Corporation

Inventor： Merid Minasse HAILE ,  Lisa Diane BOWEN ,  Clark Russell SMITH

IPC: G10K11/162 ,  B32B3/12 ,  B32B27/06 ,  B32B7/12 ,  B32B37/12

Abstract: Acoustic honeycomb structures that include cells in which a friction-locking insertion process is used to locate acoustic barriers within honeycomb cells to provide multiple degree of freedom (MDOF) acoustic liners having a variety of acoustic resonator depths. Solid polymer films are formed into acoustic barrier caps. The acoustic barrier caps are friction-locked and bonded to cell walls at one or more cell depths to form acoustically reflective hard walls that form effective bottom ends for acoustic resonators.

公开(公告)号：US20210069989A1

公开(公告)日：2021-03-11

申请号：US16953551

申请日：2020-11-20

Applicant: Hexcel Corporation

Inventor： Scott DeFelice ,  Anthony DeCarmine

IPC: B29C64/393 ,  B29C64/153

Abstract: A process for layer-by-layer manufacturing a three-dimensional object from a powder and objects made from the same is described. The process includes the step of applying a layer of a powder on a bed of a laser sintering machine. The powder includes polyetherketoneketone. The process further includes the step of solidifying selected points of the applied layer of powder by irradiation using heat energy introduced by a laser having a power L and successively repeating the step of applying the powder and the step of solidifying the applied layer of powder until all cross sections of a three-dimensional object are solidified. L is between 1 W and 20 W. In some embodiments L is between 1 and 10 W. In some embodiments, the powder is recycled PEKK powder. In some embodiments, the powder includes carbon fiber.

公开(公告)号：US10731014B2

公开(公告)日：2020-08-04

申请号：US16502277

申请日：2019-07-03

Applicant: Hexcel Corporation

Inventor： Yen-Seine Wang

IPC: C08J5/24 ,  C08J5/04 ,  B32B27/38

Abstract: Pre-impregnated composite material (prepreg) that can be cured/molded to form aerospace composite parts. The prepreg includes carbon reinforcing fibers and an uncured resin matrix. The resin matrix includes an epoxy component, polyethersulfone as a toughening agent, and a curing agent. The resin matrix is also composed of a thermoplastic particle component that includes hybrid polyamide particles wherein each hybrid particle contains a mixture of amorphous and semi-crystalline polyamide.