Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1984-06-11
1985-10-08
Kendell, Lorraine T.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
131332, 428398, 428400, A24C 550, B32B 300, D02G 300
Patent
active
045460400
ABSTRACT:
Cigarette filters with improved efficiency and reduced resistance to gas flow, and a method of preparing them, are disclosed. The filters are made from crimped multicomponent polypropylene polymers having microfissures on their surfaces and micropores on their cross-sections, with 5 to 7 crimps per centimeter of length, and a unit fineness of 5 to 7 dtex. The elementary fibers in the bundle have different centers of gravity, and are present in ratios of from 1:3 to 3:1 by weight. The fibers are prepared by separate melting and thermal treatment of each polypropylene polymer component, having LVI values ranging from 100 to 200 ml/g, at temperatures ranging from 230 to 330 degrees C. The difference in LVI values between the components is from 30 to 50 ml/g, and at least one of the components has a 5-20% high molecular weight fraction, by weight, with an LVI of from 400 to 450 ml/g. Each component is homogenized separately, after which they are mixed from a nonhomogeneous flow of melts and extruded into a bundle through 3000 to 10,000 orifices in a spinneret. The bundle, or sliver, is treated with water, relaxed and fixed at a temperature of 70 to 140 degrees C., wrapped with paper, and cut into filters.
REFERENCES:
patent: 3144025 (1964-08-01), Erlich
patent: 3232294 (1966-02-01), Orsino et al.
patent: 3329544 (1967-07-01), Smith et al.
patent: 3505164 (1970-04-01), Oppenlander
patent: 3677881 (1972-07-01), Riordon
patent: 3769148 (1973-10-01), Barlow
patent: 3957936 (1976-05-01), Lauchenauer
patent: 4055696 (1977-10-01), Kamada et al.
patent: 4173504 (1979-11-01), Tomioka et al.
patent: 4405688 (1983-09-01), Lowery
patent: 4485141 (1984-11-01), Fujimura et al.
Badura Jan
Beseda Viliam
Gregor Alexander
Hudak Jozef
Klisky Jan
Kendell Lorraine T.
Vyskummy ustav chemickych claken
LandOfFree
Cigarette filter and method of manufacture does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cigarette filter and method of manufacture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cigarette filter and method of manufacture will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2219713