Location

La Jolla, CA

Start Date

1-1-1998 12:00 AM

Description

Preimpregnated composite materials (prepregs) are increasingly used in composites manufacture in a variety of industries [1]. Fibers such as carbon, glass, quartz, or Kevlar™ fiber are coated with an uncured resin such as an epoxy, polyester, vinyl ester or polyimide forming the prepreg. The resulting prepreg material is then used at a later time in the manufacture of a composite structure. The prepreg is pliable and readily arranged into forms. Parts are made by collating plies of the prepreg onto a form or in a mold in a desired arrangement, and then further curing the resin phase of the composite material under heat and pressure. A very common form of prepreg referred to as a prepreg tow consists of long continuous bundles of fiber coated in the resin. An example of a flat prepreg tow is shown in Figure 1.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

17B

Chapter

Chapter 7: New Inspection/Control Procedures

Section

New Techniques

Pages

1793-1800

DOI

10.1007/978-1-4615-5339-7_232

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Non-Invasive Measurement of Prepreg Resin Content Using Nuclear Magnetic Resonance

La Jolla, CA

Preimpregnated composite materials (prepregs) are increasingly used in composites manufacture in a variety of industries [1]. Fibers such as carbon, glass, quartz, or Kevlar™ fiber are coated with an uncured resin such as an epoxy, polyester, vinyl ester or polyimide forming the prepreg. The resulting prepreg material is then used at a later time in the manufacture of a composite structure. The prepreg is pliable and readily arranged into forms. Parts are made by collating plies of the prepreg onto a form or in a mold in a desired arrangement, and then further curing the resin phase of the composite material under heat and pressure. A very common form of prepreg referred to as a prepreg tow consists of long continuous bundles of fiber coated in the resin. An example of a flat prepreg tow is shown in Figure 1.