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prepreg materials

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Published: 01 December 2004
Fig. 13 Polished uncured prepreg materials that were made with different prepreg processing conditions. Bright-field illumination, 25× objective More
Image
Published: 01 December 2004
Fig. 5 Cross section of uncured prepreg material showing unimpregnated areas (dark) and impregnated areas (gray). Bright-field illumination, 25× objective More
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009074
EISBN: 978-1-62708-177-1
... of unstaged and staged prepreg materials for optical analysis. boron fiber composites grinding mounting optical analysis polishing prepreg materials sample preparation sectioning titanium honeycomb composites titanium/polymeric composite hybrids METHODS AND MATERIALS most commonly used...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009077
EISBN: 978-1-62708-177-1
.... This article describes the optical microscopy and bright-field illumination techniques involved in analyzing ply terminations, prepreg plies, splices, and fiber orientation to provide the insight necessary for optimizing composite structure and performance. bright-field illumination composite materials...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009071
EISBN: 978-1-62708-177-1
... of prepreg materials, automated tape lay-up of prepreg materials, resin transfer molding, vacuum-assisted resin transfer molding, resin film infusion, wet lay-up, filament winding, pultrusion, and compression molding of sheet molding or bulk molding compound. While these processes are general in description...
Image
Published: 01 December 2004
prepreg material combinations (glass fabric prepreg and carbon fiber prepreg), and the number of plies. Bright-field illumination, 5× objective More
Image
Published: 01 December 2004
Fig. 6 Cross section of a composite part made with glass fabric prepreg and two unidirectional carbon fiber prepreg materials having different thicknesses (areal weights) and fiber types. Slightly uncrossed polarized light, 10× objective More
Image
Published: 01 November 1995
Fig. 8 Orientation for viewing the part from the surface to be tooled inward through its thickness as viewed from the inside. A table is frequently supplied to describe ply number, orientation, and prepreg material. More
Image
Published: 01 December 2004
Fig. 5 Micrograph of a composite part made with two unidirectional carbon fiber prepreg materials having different thicknesses (areal weights) and fiber types. Slightly uncrossed polarized light, 10× objective More
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009078
EISBN: 978-1-62708-177-1
... in the formulation stage or during the processing of prepreg materials ( Fig. 1 ) ( Ref 10 ). These volatile materials are difficult to completely remove and, in many cases, cause voids in the cured parts. Fig. 1 Glass fabric composite that has high void content. Void areas are due to residual solvent from...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003418
EISBN: 978-1-62708-195-5
... cylindrical tapered tubes TUBE ROLLING is the most widely used method of producing composite tubular parts that require high strength-to-weight properties as well as high production capabilities. The tube rolling process utilizes prepreg materials having accurate resin content, which are produced on very...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003434
EISBN: 978-1-62708-195-5
..., it is either cleaned or discarded. Requirements should be established concerning cleaning, frequency of changing, and storage of protective clothing. Protective gloves are worn when handling prepregs, adhesives, or precured details that will be bonded. The following materials or procedures are generally...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009083
EISBN: 978-1-62708-177-1
... to the vacuum debulking and compaction procedure. This increases the propensity for voids, especially in the fillet areas where the core may be under vacuum and there is very little compaction pressure. The use of solvent-manufactured prepreg materials is even more susceptible to void formation, because...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003403
EISBN: 978-1-62708-195-5
... Abstract Composite tooling is the making of tools from composite materials. This article focuses on wet lay-up methods and techniques that are used to fabricate prepreg tooling. It discusses the advantages and disadvantages of composite tools. The article describes the process considerations...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003045
EISBN: 978-1-62708-200-6
... specific types of flaws and material structure. The interlaminar reflections in composite materials formed from continuous fiber prepreg tape are low in amplitude compared with those of woven material systems. Woven materials produce large-amplitude periodic reflections that decay logarithmically...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003036
EISBN: 978-1-62708-200-6
... are large fiber bundles that are woven into a very thick fabric, which is used to build up part thickness with a minimum number of plies. These materials are available in large rolls of various widths. The full and partial plies in the part are cut from the prepreg rolls using large scissors, utility knives...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009080
EISBN: 978-1-62708-177-1
... Abstract This article describes the dispersed-phase toughening of thermoset matrices by the development of multiphase-structure thermosetting matrices using rubber and/or thermoplastic materials. It discusses two main methods for manufacturing prepregs, namely, single-pass impregnation...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003476
EISBN: 978-1-62708-195-5
... as those used in versions for other product forms, such as film and wire enamels, it was a relatively easy matter to make the laminating resins commercially available at a reasonable cost. The major problems in processing condensation-type polyimide prepreg materials can be attributed both...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003409
EISBN: 978-1-62708-195-5
... resin in layers of typically 0.13 mm (0.005 in.) thickness, prepreg technology was developed by the 3M Company in the United States at the request of Rolls Royce Engines in the United Kingdom, which had started to produce carbon fiber in-house. Automation of fiber and resin combination provided material...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003041
EISBN: 978-1-62708-200-6
... process prepregs tool materials AUTOCLAVE MOLDING is a process used to impart a controlled heat and pressure cycle cure to a layup. Additional pressure permits higher density and removal of volatiles from the resin. Preparing the layup for autoclave molding is discussed in the section “Materials...