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US3832433A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of making plastic composite with wire reinforcements

Assignee: Bethlehem Steel Corp
•
Filing: 1972-08-28
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Granted: 1974-08-27
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Expires: 1992-08-28
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Abstract

Abstract A wire fiber reinforced plastic composite is formed by coating thin ferrous wires and sacrificial metal wires such as zinc wires in the form of steel and zinc wool or the like with a film of fused acrylonitrile-butadiene-sytrene subsequent to thorough cleaning of the wires. The ferrous and zinc wires are then combined together into a metallic fiber, extrusion coated with a styrene base plastic resin such as polystyrene or acrylonitrilebutadiene-styrene and then chopped into uniform pellets for use as a feed material for a plastic composite hot forming operation preferably heated by induction heating of the component ferrous wires in the plastic. Alternatively the ferrous and zinc fibers can be extrusion coated separately and then blended together as pellets or even used separately for making a plastic composite.

Inventors

  • 👤 H Schaffer
  • 👤 C Bomboy

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 15:11
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/12

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 32 words
A method of making a plastic composite according to claim 1 wherein the styrene base resin sheath which forms the matrix plastic is selected from the group consisting of polystyrene and acrylonitrile-butadiene-styrene.
Claim 2
Independent Claim 166 words
A method of making a corrosion resistant plastic composite having a smooth defect free surface comprising: a. coating a plurality of ferrous metal fibers with a surface film of acrylonitrile-butadiene-styrene resin dissolved in an organic solvent and heating the coated fibers to expel the solvent and fuse the remaining film of resin to the surface of the fibers, b. uniformly combining said coated ferrous fibers with a predetermined quantity of a styrene base plastic from the group consisting of polystyrene and acrylonitrile-butadiene-styrene in a manner such that short lengths of the ferrous fibers are encapsulated within the plastic to form ferrous fiber containing plastic pellets, c. combining said pellets of (b) with additional styrene base plastic pellets without included fibers and uniformly blending both sets of plastic pellets together, d. heating said plastic pellets and included ferrous fibers to an elevated temperature, and e. forming the plastic and included ferrous fibers uniformly distributed throughout the plastic into a desired predetermined shape by a hot shaping operation.
Claim 3
Dependent Claim 75 words
A method of producing a corrosion resistant plastic composite according to claim 3 wherein a plurality of sacrificial metal fibers are treated as in step (a) and uniformly combined with a styrene base plastic as in step (b) together with the ferrous fibers and thereafter treated as in steps (c) and (d) with the plastic pellets and ferrous fibers containing plastic pellets to form a ferrous fiber reinforced plastic composite with included sacrificial metal fibers.
Claim 4
Independent Claim 118 words
A method of making a corrosion resistant plastic composite comprising: a. coating a series of ferrous metal fibers with a surface film of fused acrylonitrile-butadiene-styrene resin; b. coating a series of sacrificial metal fibers having a greater electro negativity than iron with a surface film of fused acrylonitrile-butadiene-styrene resin; c. combining the ferrous and sacrificial metal fibers into a strand of metallic fibers; d. extruding a sheath of a styrene base plastic over the surface of the metallic fibers; e. severing the plastic sheathed strand into a series of short pellets; f. heating the plastic sheathed pellets; and g. forming the heated plastic and included fibers into a desired shape by a molding operation at an elevated temperature.
Claim 5
Dependent Claim 33 words
A method of making a plastic composite according to claim 5 wherein the plastic sheathed pellets are heated in step (f) by electrical currents in the ferrous fibers induced by induction coil means.
Claim 6
Dependent Claim 47 words
A method of making a plastic composite according to claim 5 wherein the plastic sheath of a styrene base plastic is extruded over the ferrous and sacrificial metal fibers prior to combining the ferrous and sacrificial metal fibers together but prior to heating the plastic sheathed pellets.
Claim 7
Dependent Claim 28 words
A method of making a corrosion resistant plastic composite according to claim 7 wherein the styrene base plastic is selected from the group consisting of polystyrene and acrylonitrile-butadiene-styrene.
Claim 8
Dependent Claim 35 words
A method of making a corrosion resistant plastic composite according to claim 5 wherein the styrene base plastic which is extruded over the metal fibers is selected from the group consisting of polystyrene and acrylonitrile-butadiene-styrene.
Claim 9
Independent Claim 184 words
A method of making a ferrous fiber reinforced plastic composite having ferrous fibers distributed uniformly throughout a plastic matrix comprising: a. passing a linearly extending collection of ferrous fibers through a cleaning operation, b. passing the linearly extending collection of ferrous fibers through a primer composed of a polymeric adhesion inducing material comprised of acrylonitrile-butadiene-styrene in an organic solvent, c. passing the linearly extending collection of ferrous fibers through heating means to evaporate the organic solvent and fuse a thin layer of the polymeric material upon the surface of the ferrous fibers, d. extruding a sheath of a thermoplastic polymer comprising a styrene base plastic compatible with the polymeric film upon the surface of the ferrous fibers about the exterior of the linearly extending collection of ferrous fibers, e. chopping the linearly extending ferrous fibers together with the extruded plastic coatings about said ferrous fibers into pellets, f. heating and blending the pellets to form a uniform mix of matrix plastic and reinforcing fibers, and g. forming the heated plastic by heated plastic forming apparatus into a desired shape having smooth external molded surfaces.
Claim 10
Dependent Claim 58 words
A method of making a ferrous fiber reinforced plastic composite according to claim 10 wherein linearly extending sacrificial metal fibers are treated as in steps (a) through (e) and the pellets containing said sacrificial metal fibers aRe heated and blended in step (f) with the ferrous fiber containing pellets in order to make a corrosion resistant plastic composite.
Claim 11
Dependent Claim 69 words
A method of making a ferrous fiber reinforced plastic composite according to claim 10 wherein additional plastic pellets of the same composition as the plastic pellets of step (e) but without included ferrous fibers are combined in step (f) with the pellets containing ferrous fibers and are heated and blended in step (f) with the ferrous fiber containing pellets to form a uniform mix of plastic and ferrous fibers.
Claim 12
Dependent Claim 63 words
A method of making a ferrous fiber reinforced plastic composite according to claim 12 wherein linearly extending sacrificial metal fibers are treated as in steps (a) through (e) and the resulting pellets containing said sacrificial metal fibers are heated and blended in step (f) with the plastic pellets and ferrous fiber containing plastic pellets in order to make a corrosion resistant plastic composite.

References Cited (Backward Citations)

US2636257A Cited
US2817618A Cited
US3184368A Cited
US3231341A Cited
US3503823A Cited
US3632366A Cited
US3582456A Cited
US3577494A Cited
US3687798A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-08-26 1978-02-25 1978-08-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-08-26 1982-02-25 1982-08-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-08-26 1986-02-25 1986-08-27 $7700.00 Window Closed / Lapsed

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