Processed fiber for emission of energy into a medium and method therefor

• US 6,426,124 B2
• Filed: 02/22/2001
• Issued: 07/30/2002
• Est. Priority Date: 12/21/1998
• Status: Expired due to Fees

• Current Assignee: Sikorsky Aircraft Corporation (Martin Marietta Corporation)
• Original Assignee: Sikorsky Aircraft Corporation (Martin Marietta Corporation)
• Inventors: Olster, Elliot F., Peterlin, Dennis Joseph, Dannenhoffer, Thomas
• Primary Examiner(s): Beck, Shrive P.
• Assistant Examiner(s): Fuller, Eric B.
• Application Number:
  US09/789,628
• Publication Number:
  US 20010027838A1
• Time in Patent Office: 523 Days
• Field of Search: 427/508, 427/521, 427/522, 427/554, 427/516, 427/517, 427/518, 427/104, 427/487, 427/496, 427/498, 427/500, 427/501, 427/512, 427/514, 427/515, 427/505, 219/633, 219/634
• US Class Current: 427/487
• CPC Class Codes: B29C 2035/0838 using laser
• CPC Class Codes: B29C 35/0272 using lost heating elements, i.e. heating means incorporated and remaining in the formed article for preforms with internal stresses B29C61/0625; joining using lost heating elements B29C65/34; making electrically conductive articles B29C70/882
• CPC Class Codes: B29C 35/0805 using electromagnetic radiation
• CPC Class Codes: B29C 73/02 using liquid or paste-like material B29C73/16 takes precedence
• CPC Class Codes: B29C 73/34 for local heating
• CPC Class Codes: B64F 5/27 by irradiation, e.g. of infrared radiation
• CPC Class Codes: Y10T 156/102 with deformation or cutting of corrugated lamina
• CPC Class Codes: Y10T 428/249924 Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
• CPC Class Codes: Y10T 428/2904 Staple length fiber
• CPC Class Codes: Y10T 428/2913 Rod, strand, filament or fiber
• CPC Class Codes: Y10T 428/2956 Glass or silicic fiber or filament with metal coating
• CPC Class Codes: Y10T 428/2964 Artificial fiber or filament
• CPC Class Codes: Y10T 428/298 Physical dimension

Abstract

A processed fiber is used to distribute energy from an electromagnetic (EM) energy source to a material in which the fiber is embedded. The electromagnetic energy source supplies electromagnetic energy to the fiber and the fibers emit portions of the EM energy along the length of the fiber. The sealant material absorbs a quantity of the electromagnetic energy sufficient to cure the sealant material and propagates excess electromagnetic energy through the sealant material without significant additional absorption. This prevents the sealant material from over-curing. Additionally, a fully cured material can be used to generate thermal energy and thereby serve as a heat blanket that can be used to de-ice aircraft.

Claims

1. A method for adhering a sealant material to a structure comprising:

disposing the sealant material on at least a portion of the structure, the sealant material having one or more non-metallic continuous fibers embedded therein;

providing electromagnetic energy to the one or more non-metallic continuous fibers;

transmitting electromagnetic energy from intermediate sections of the one or more non-metallic continuous fibers in the sealant material thereby curing the sealant material such that the sealant material fixedly adheres to the structure; and

propagating excess electromagnetic energy through the sealant material without substantial absorption of the excess electromagnetic energy by the sealant material.

2. The method as claimed in claim 1, further comprising the step of providing the electromagnetic energy to an end of the one or more continuous fibers.

3. The method as claimed in claim 1, further comprising the step of irremovably embedding the non-metallic continuous fibers into the sealant material.

4. The method as claimed in claim 1, further comprising the step of providing electromagnetic energy along a length of the one or more non-metallic continuous fibers.

5. The method as claimed in claim 1 further comprising:

processing the fibers prior to embedding the fibers in the sealant material such that the fibers disburse electromagnetic energy from intermediate sections of the fibers.

6. The method as claimed in claim 5 wherein the processing is selected from the group consisting of bending, scratching, etching, doping, coating and crimping and combinations thereof.

7. The method as claimed in claim 6 further comprising:

fabricating the sealant material from a material selected from the group consisting of thermoset polymer and thermoplastic polymer.

8. The method as claimed in claim 7 further comprising:

generating the electromagnetic energy from a source selected from the group consisting of CO₂ lasers, Nd;

YAG lasers Ho;

YAG lasers, diode lasers, Er;

YAG lasers and ruby lasers.

9. A method for adhering a sealant material to a structure comprising:

fabricating the sealant material from a material selected from the group consisting of thermoset polymer and thermoplastic polymer;

embedding a continuous fiber in the sealant material such that the fiber disburses electromagnetic energy from intermediate sections of the fiber;

processing the fiber prior to said embedding step, said processing selected from the group consisting of bending, scratching, etching, doping, coating, crimping and combinations thereof;

disposing the sealant material on at least a portion of the structure;

supplying electromagnetic energy to the continuous fiber from a source selected from the group consisting of CO₂ lasers, Nd;

YAG lasers Ho;

YAG lasers, diode lasers, Er;

YAG lasers and ruby lasers to the fibers;

disbursing the electromagnetic energy from intermediate sections of the one or more fibers throughout the sealant material thereby curing the sealant material such that the sealant material fixedly adheres to the structure; and

propagating excess electromagnetic energy through the sealant material without substantial absorption of the excess electromagnetic energy by the sealant material.

10. A method for adhering a sealant material to an aircraft structure comprising:

disposing the sealant material on at least a portion of the aircraft structure, the sealant material having a continuous non-metallic fiber embedded therein;

providing electromagnetic energy along the length of the continuous non-metallic fiber; and

disbursing the electromagnetic energy from intermediate sections of the fiber into the sealant material thereby curing the sealant material such that the sealant material fixedly adheres to the structure.

11. The method as claimed in claim 10 wherein said disbursing step increases the cross-link density of the sealant material to self-limit the sealant material curing.

12. The method as claimed in claim 10 further comprising the step of providing the electromagnetic energy to an end of the one or more continuous fibers.

13. The method as claimed in claim 12 further comprising the step of irremovably embedding an opposite end of the one or more continuous fibers into the sealant material.