Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1991-12-31
1993-09-14
Hoke, Veronica P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
428289, 524100, 524102, C08K 554
Patent
active
052449475
ABSTRACT:
A method of stabilizing a polyolefin nonwoven web against actinic radiation which involves the steps of (a) melting a mixture of a thermoplastic polyolefin, a first additive, and a second additive; (b) forming fibers by extruding the resulting melt through a die at a shear rate of from about 50 to about 30,000 sec.sup.-1 and a throughput of no more than about 5.4 kg/cm/hour; (c) drawing the fibers; and (d) collecting the fibers on a moving foraminous surface as a web of entangled fibers. The first additive is a benzotriazolyl-containing polydialkylsiloxane having a molecular weight in the range of from about 500 to about 1,400 and a polydispersity of from about 1.3 to about 2.5. The second additive is a polyalkylpiperidyl-containing polydialkylsiloxane having a molecular weight in the range of from about 1,500 to about 30,400 and a polydispersity of from about 1.3 to about 3.0.
REFERENCES:
patent: 3016599 (1962-01-01), Perry
patent: 3341394 (1967-09-01), Kinney
patent: 3655862 (1972-04-01), Dorschner
patent: 3692618 (1972-09-01), Dorschner
patent: 3704198 (1972-11-01), Prentice
patent: 3705068 (1972-12-01), Dobo
patent: 3755527 (1973-08-01), Keller
patent: 3802817 (1974-04-01), Matsuki
patent: 3849241 (1974-11-01), Butin
patent: 3853651 (1974-12-01), Porte
patent: 3978185 (1976-08-01), Buntin
patent: 4064605 (1977-12-01), Akiyama
patent: 4091140 (1978-05-01), Harmon
patent: 4100319 (1978-07-01), Schwartz
patent: 4100324 (1978-07-01), Anderson
patent: 4118531 (1978-10-01), Hauser
patent: 4340563 (1982-07-01), Appel
patent: 4405297 (1983-09-01), Appel
patent: 4434204 (1984-02-01), Harman
patent: 4627811 (1986-12-01), Greiser
patent: 4644045 (1987-02-01), Fowells
patent: 4663220 (1987-05-01), Wisneski
patent: 4859759 (1989-08-01), Maycock et al.
patent: 4920168 (1990-04-01), Nohr et al.
patent: 4923914 (1990-05-01), Nohr
patent: 5051458 (1991-09-01), Costanzi et al.
V. A. Wente, "Superfine Thermoplastic Fibers", vol. 48, No. 8, pp. 1342-1346 (1956).
V. A. Wente et al., "Manufacture of Superfine Organic Fibers", NRL Report 4364 (111437), dated May 25, 1954.
Robert R. Butin and Dwight T. Lohkamp, "Melt Blowing--A One-Step Web Process for New Nonwoven Products", vol. 56, No. 4, pp. 74-77 (1973).
MacDonald John G.
Nohr Ronald S.
Hoke Veronica P.
Kimberly-Clark Corporation
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