Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including interlaminar mechanical fastener
Patent
1986-11-10
1988-02-16
Morgenstern, Norman
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including interlaminar mechanical fastener
428240, 428241, 428244, 428245, 428257, 428258, D03D 300, D03D 304, D03D 1308
Patent
active
047254858
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a textile or filamentary (reinforcement) structure or fabric for a reinforced composite material and more particularly it relates to a textile or filamentary reinforcement, bracing or stiffening structure wherein no cut or free filaments ends are exposed at the end surfaces or side edges of the textile or filamentary structure.
BACKGROUND ART
Composite materials reinforced such by textile or filamentary structures such as woven glass fibre fabrics and woven carbon fibre fabrics, have been used for machine parts requiring strength, such as in aircraft, automobiles, railroad vehicles and ships, and as structural building members. Further, composite materials, such as carbon fibre/carbon matrices, grapite fibre/carbon matrices and graphite fibre/graphite matrices, have been used for machine parts requiring heat resistance to above 1000.degree. C.
Such composite materials reinforced by textile or filamentary structures, are light in weight and physically and chemically strong and they are valued for their usefulness in diverse fields.
The strength characteristics of such composite materials (for example, carbon-carbon composite) depend largely on the construction of a textile or filamentary structure incorporated in a matrix as a reinforcing base material, for example, as a woven fabric body. Thus, such textile structures have their constructions selected to maximise their filament content and diversity, as disclosed, for example, in Japanese Patent Application Laid-Open No. 57-176232 and U.S. Pat. No. 3,904,464, in order to increase the strength of the finished or resultant composite materials. These known textile or filamentary structures, however, each have numerous filament ends exposed, typically in their cut state, at the fabric end or side edge surfaces, with the result that, when the textile structure is impregnated with thermosetting resin, filaments become dislodged, leading to the textile or filamentary structure losing its shape. It may thus be necessary to apply a subsequent mechanical cutting operation to the mis-shaped portion, after the setting of the resin, in order to remove that mis-shapen portion, which severely undermines both the economy of usage of sources or ingredient material and production.
Furthermore, the production of a composite material which is complicated in shape poses another problem, namely that of the strength being decreased owing to the shape or contour involved.
SUMMARY OF THE INVENTION
According to the invention there is provided a textile or filamentary structure comprising a first filament which is disposed in multiple turns or convolutious in a first plane without forming a cut, free or exposed end at each turn and then disposed as a subsequent lamination in another parallel filament-disposition plane in which it extends in a direction different from the direction of filament disposition in the first plane, whereafter it repeats the lamination in successive planes, a second filament sinuously extending in planes which intersect the planes of disposition of the first filament, without forming a cut, free or exposed end at each turn, and third filament which is disposed adjacent the planar laminations of the first filament and sinuously extends through the loops of the second filament thereby retaining the same in the body of the structure.
Such a textile structure according to the invention affords a structure wherein no ends of filaments constituting the base material are exposed at the surface of a composite material.
Such a filamentary arrangement obviates the aforesaid problems inherent in conventional three dimensional filament-reinforced composite materials.
In the textile or filamentary structure according to the invention, although the filament ends appear or are exposed at the start and end points of filament disposition, there is no cut, free or exposed filament end at each turn, fold or convolution. Therefore, the textile or filamentary structure exhibits satisfactory shape-retention capability, even
REFERENCES:
patent: 4063684 (1977-12-01), O'Brien et al.
patent: 4336296 (1982-06-01), Fukuta et al.
patent: 4546032 (1985-10-01), Vasilos
Burke Margaret
Morgenstern Norman
Shikishima Canvas Kabushiki Kaisha
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