Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Production of continuous or running length
Patent
1990-10-25
1992-01-21
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Production of continuous or running length
264569, 26433114, B29C 5528
Patent
active
050826166
ABSTRACT:
A method for preparing biaxially oriented poly(vinylidene fluoride) films involving the addition of a minor amount of a polymer miscible with PVDF, particularly poly(methyl methacrylate), to the poly(vinylidene fluoride) to form a blend exhibiting reduced crystallinity and reduced rates of crystallization during the film forming process. The low crystallinity permits the blend to be subsequently formed into biaxially oriented film in a double-bubble tubular film extrusion process by retarding the rate of crystallization in the first bubble, thereby permitting formation of the second bubble without rupture. The films thus formed possess piezoelectric and other desirable characteristics.
REFERENCES:
patent: 2979777 (1961-04-01), Goldman
patent: 3217073 (1965-11-01), Olson et al.
patent: 3278663 (1966-10-01), Graham
patent: 3456044 (1969-07-01), Pahlke
patent: 3691264 (1972-09-01), Asahina
patent: 3869534 (1975-03-01), Yoshikawa et al.
patent: 3878274 (1975-04-01), Murayama et al.
patent: 3925339 (1975-12-01), Ishii et al.
patent: 3931446 (1976-01-01), Murayama et al.
patent: 4290983 (1981-09-01), Sasaki et al.
patent: 4298719 (1981-11-01), Mizuno et al.
patent: 4481158 (1984-11-01), Georlette et al.
patent: 4656234 (1987-04-01), Murayama et al.
patent: 4667001 (1987-05-01), Mizuno
patent: 4670527 (1987-06-01), Mizuno
patent: 4731288 (1988-03-01), Mizuno et al.
Kang, White and Cakmak, International Polymer Processing, vol. 5, Issue 2, p. 62.
Nie Tao
White James L.
Edison Polymer Innovation Corp.
Hochberg D. Peter
Kusner Mark
Thurlow Jeffery
Weisz Louis J.
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