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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
... preparation 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...
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
... composite materials composite performance composite structure analysis degradation fiber orientation fiber volume foreign objects inclusion optical microscopy ply orientation ply termination prepreg plies splices void content THE ANALYSIS OF THE STRUCTURE of a composite material...
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
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
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
... spiral wrapping 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...
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 Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003045
EISBN: 978-1-62708-200-6
... to locate and differentiate between 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...
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 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...
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: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003409
EISBN: 978-1-62708-195-5
... material with near- straight fibers and consistent resin content in a form that had a tackiness suited to laying up multiple layers of material in complex-shape tools. By 2000, a vast range of prepregs with different fiber types, fabrics, tape styles, resin types, and thicknesses became available...
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 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.a0003419
EISBN: 978-1-62708-195-5
... on rolls. In most cases, the reinforcement is unidirectional (in the longitudinal direction), but woven and braided material forms are also available. Powder-impregnated and commingled prepregs are supplied as yarns, often woven or braided into a fabric, although fabrics may also be powder impregnated...
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...
Book Chapter

Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003412
EISBN: 978-1-62708-195-5
... separator film should be used. A prepreg with high flow will not be retarded by porous Teflon, which acts as a minibleeder ply and soaks up a small amount of resin. Bleeder The purpose of the bleeder material is to absorb excess resin from the lay-up during cure, thereby producing the desired fiber...