Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1977-11-25
1978-12-12
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 466, 264282, 264DIG17, B29D 2700
Patent
active
041296346
ABSTRACT:
A novel structural member, such as a tennis racket frame, having an unusually high strength to weight ratio is provided comprising an expanded foamed plastic core integrally bonded to a shell comprising at least one layer of resin-coated unidirectionally oriented graphite fibers, the shell completely encasing the core at any transverse cross section of the structural member, with a seamless sleeve made of a thin, flexible cellulosic film between the core and the shell.
The structural member is prepared by arranging within a mold cavity an outer shell comprising at least one sheet of resin-coated unidirectionally oriented graphite fibers and a core comprising a foamable resin composition while the core is maintained within a seamless sleeve made of a thin, flexible cellulosic film, sealing the mold cavity and activating the foamable resin composition to cause expansion and generate pressure within the mold cavity and thereby provide intimate bonding of the core to the shell.
REFERENCES:
patent: 4061520 (1977-12-01), Cecka et al.
Cecka Andrew M.
Dano Pol
Pawling Paul G.
Anderson Philip
Fansteel Inc.
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