Plastic and nonmetallic article shaping or treating: processes – Including step of generating heat by friction
Patent
1977-10-19
1981-01-13
Lowe, James B.
Plastic and nonmetallic article shaping or treating: processes
Including step of generating heat by friction
264 37, 264118, 264122, 264142, B29C 1700, B29C 2900
Patent
active
042449030
ABSTRACT:
The moldings are manufactured from synthetic thermoplastics, from non-thermoplastic fibrous flakes, which are available in an uncoated or incompletely coated state, and from optionally admixed fillers. The fibrous flakes and the thermoplastic material are mixed under the action of pressure and heat to produce a precompacted composite material, in which the fibrous flake material constitutes about 65% or more by volume of the composite material, and the latter is then extruded and is subsequently finally shaped and finally compacted at the same time. To manufacture the precompacted composite material, the non-thermoplastic materials consisting of the fibrous flake material and of any fillers, as well as synthetic thermoplastics which are adapted to adhere to the fibrous flake material, are subjected to a pretreatment, by which the thermoplastic and non-thermoplastic materials are extruded at elevated temperature and are thus bonded together and the extrusions are subsequently chopped to form a flowable composite particulate material.
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patent: 3193601 (1965-07-01), Billingsley
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McKelvey, "Polymer Processing", Wiley, N.Y. (1962), p. 285.
Modern Plastics Encyclopedia (1965) p. 594, McGraw-Hill (N.Y.)
Anon., Modern Plastics Encyclopedia, McGraw-Hill, N.Y., (1965) p. 59.
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