Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1998-03-23
1999-10-26
Krynski, William
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
428394, 428500, 5263481, D02G 300
Patent
active
059724986
ABSTRACT:
Solutions of intermediate molecular weight polymers from about 200,000 to about 4,000,000, such as polyethylene, in a relatively non-volatile solvent are extruded through an aperature at constant concentration and thereafter stretched at a ratio of at least about 3:1 prior to cooling to form a first gel. The first gels are extracted with a volatile solvent to form a second gel, and the second gel is dried to form a low porosity xerogel. Stretching occurs with any one or more of the first gel, second gel or xerogel. The polyethylene products produced by our process include products having a molecular weight between about 200,000 and about 4,000,000 a tenacity of at least about 13 grams/denier, a modulus of at least about 350 gram/denier, a porosity of less than 10% by volume, a crystalline orientation function of at least about 0.95, and a main melting temperature of at least about 140.degree. C.
REFERENCES:
patent: 3017238 (1962-11-01), Levine et al.
patent: 3048465 (1962-08-01), Jugeleit
patent: 3210452 (1965-10-01), Howard
patent: 3846404 (1974-11-01), Nichols
patent: 3962205 (1976-06-01), Ward et al.
patent: 4228118 (1980-10-01), Wu et al.
patent: 4254072 (1981-03-01), Capaccio et al.
patent: 4268470 (1981-05-01), Capaccio et al.
patent: 4276348 (1981-06-01), Wu et al.
patent: 4403012 (1983-09-01), Harpell et al.
patent: 4413110 (1983-11-01), Kavesh et al.
patent: 4415525 (1983-11-01), Capaccio et al.
patent: 4422993 (1983-12-01), Smith et al.
patent: 4430383 (1984-02-01), Smith et al.
patent: 4436689 (1984-03-01), Smith et al.
patent: 4455273 (1984-06-01), Kavesh et al.
patent: 4501856 (1985-02-01), Harpell et al.
patent: 4530809 (1985-07-01), Shindo et al.
patent: 4536536 (1985-08-01), Kavesh et al.
patent: 4551296 (1985-11-01), Kavesh et al.
patent: 4584347 (1986-04-01), Kavesh et al.
patent: 4599267 (1986-07-01), Kwon et al.
patent: 4663101 (1987-05-01), Kavesh et al.
patent: 5736244 (1998-04-01), Kavesh et al.
"Polymer Communications", Polymer Bulletin, Kalb and Pennings, vol. 1, pp. 879-880 (1979).
"Material Strength and Drawing Mechanism of Hot Drawn High Molecular Weight Polyethylene", Journal of Materials Science, Kalb & Pennings vol. 15 pp. 2584-2590 (1980).
"Phase Separation Spinning of Polyvinyl Alcohol Fibers", M.M. Zwick, J.A. Duiser, and C. Van Bouchove, pp. 188-207. (Soc. Chem. Indy, London) Monograph, No. 30, 1986.
"Spinning of Fibers from Polymer Solutions Undergoing Phase Separation . . .", M.M. Zwick, Applied Polymer Symposia, No. 6, pp. 109-149 (1967).
"Influence of Spinning/Hot Drawing Conditions on the Tensile Strength of Porous High Molecular Weight Polyethylene", Polymer Bulletin, vol. 2, pp. 775-783, (1980).
Kavesh Sheldon
Prevorsek Dusan Ciril
Allied-Signal Inc.
Andrews Virginia S.
Brown Melanie L.
Criss Roger H.
Gray Jill M.
LandOfFree
Shaped polyethylene articles of intermediate molecular weight an does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Shaped polyethylene articles of intermediate molecular weight an, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shaped polyethylene articles of intermediate molecular weight an will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-761626