公开(公告)号：US11214894B2

公开(公告)日：2022-01-04

申请号：US15847581

申请日：2017-12-19

Applicant: Continental Structural Plastics, Inc.

Inventor： Probir Kumar Guha ,  Michael J. Siwajek ,  Michael J. Hiltunen ,  Shane Skop ,  Christopher Hiltunen ,  Patrick Hale

IPC: D02J1/18 ,  B65H51/005 ,  C08J5/24 ,  B29C70/08 ,  B32B5/26 ,  B29B15/08 ,  B32B9/04 ,  B32B17/00 ,  B32B17/06 ,  D01G1/04 ,  B29K307/04

Abstract: A process for debundling a carbon fiber tow into dispersed chopped carbon fibers suitable for usage in molding composition formulations is provided. A carbon fiber tow is fed into a die having fluid flow openings, through which a fluid impinges upon the side of the tow to expand the tow cross sectional area. The expanded cross sectional area tow extends from the die into the path of a conventional fiber chopping apparatus to form chopped carbon fibers, or through contacting tines of a mechanical debundler. Through adjustment of the relative position of fluid flow openings relative to a die bore through which fiber tow passes, the nature of the fluid impinging on the tow, the shape of the bore, in combinations thereof, an improved chopped carbon fiber dispersion is achieved. The chopped carbon fiber obtained is then available to be dispersed in molding composition formulations prior to formulation cure.

公开(公告)号：US10337129B2

公开(公告)日：2019-07-02

申请号：US14398673

申请日：2013-05-01

Applicant: CONTINENTAL STRUCTURAL PLASTICS, INC.

Inventor： Probir Kumar Guha ,  Michael J. Siwajek ,  Michael J. Hiltunen ,  Shane Skop ,  Christopher Hiltunen ,  Patrick Hale

IPC: D02J1/18 ,  C08J5/24 ,  B29C70/08 ,  B29B15/08 ,  B32B9/04 ,  B32B17/00 ,  B32B17/06 ,  D01G1/04 ,  B65H51/005 ,  B32B5/26 ,  B29K307/04

Abstract: A process for debundling a carbon fiber tow into dispersed chopped carbon fibers suitable for usage in molding composition formulations is provided. A carbon fiber tow is fed into a die having fluid flow openings, through which a fluid impinges upon the side of the tow to expand the tow cross sectional area. The expanded cross sectional area tow extends from the die into the path of a conventional fiber chopping apparatus to form chopped carbon fibers, or through contacting tines of a mechanical debundler. Through adjustment of the relative position of fluid flow openings relative to a die bore through which fiber tow passes, the nature of the fluid impinging on the tow, the shape of the bore, in combinations thereof, an improved chopped carbon fiber dispersion is achieved. The chopped carbon fiber obtained is then available to be dispersed in molding composition formulations prior to formulation cure.

公开(公告)号：US20180105958A1

公开(公告)日：2018-04-19

申请号：US15847581

申请日：2017-12-19

Applicant: Continental Structural Plastics, Inc.

Inventor： Probir Kumar Guha ,  Michael J. Siwajek ,  Michael J. Hiltunen ,  Shane Skop ,  Christopher Hiltunen ,  Patrick Hale

IPC: D02J1/18 ,  B32B17/00 ,  B32B17/06 ,  C08J5/24 ,  B65H51/005 ,  B32B9/04 ,  B29C70/08 ,  D01G1/04 ,  B32B5/26 ,  B29B15/08 ,  B29K307/04

CPC classification number: D02J1/18 ,  B29B15/08 ,  B29C70/08 ,  B29K2307/04 ,  B32B5/26 ,  B32B9/047 ,  B32B17/00 ,  B32B17/067 ,  B32B2250/02 ,  B32B2262/10 ,  B32B2262/101 ,  B32B2262/106 ,  B65H51/005 ,  B65H2701/314 ,  C08J5/24 ,  C08J2300/00 ,  D01G1/04 ,  Y10T29/49801 ,  Y10T83/0405 ,  Y10T83/041 ,  Y10T83/0443 ,  Y10T428/2495

Abstract: A process for debundling a carbon fiber tow into dispersed chopped carbon fibers suitable for usage in molding composition formulations is provided. A carbon fiber tow is fed into a die having fluid flow openings, through which a fluid impinges upon the side of the tow to expand the tow cross sectional area. The expanded cross sectional area tow extends from the die into the path of a conventional fiber chopping apparatus to form chopped carbon fibers, or through contacting tines of a mechanical debundler. Through adjustment of the relative position of fluid flow openings relative to a die bore through which fiber tow passes, the nature of the fluid impinging on the tow, the shape of the bore, in combinations thereof, an improved chopped carbon fiber dispersion is achieved. The chopped carbon fiber obtained is then available to be dispersed in molding composition formulations prior to formulation cure.