Sterilization wrap material

Details Sterilization wrap material Sterilization wrap material

1996-10-11

1997-12-16

Choi, Kathleen

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

428213, 428220, B32B 330

Patent

active

056982941

ABSTRACT:
A polyolefin film for use as a sterilization wrap material which includes a film with a thickness of from about 0.005 mm to about 0.2 mm and having a plurality of discontinuous thinned regions. The thinned regions constitute at least about 25 percent of the surface area of the film. The thickness and area of the thinned regions are adapted to permit the passage of steam and water vapor through the film during steam sterilization. The film is made by a method which involves extruding a molten polyolefin film at a first temperature and passing the molten film through a nip. The nip includes an anvil roll and a pattern roll. The anvil roll has a smooth surface and the surface of the pattern roll is maintained at a temperature which is at least about 150.degree. C. lower than the first temperature and is selected to prevent sticking of the film to either roll.

REFERENCES:
patent: 2718666 (1955-09-01), Knox
patent: 2841202 (1958-07-01), Hirschy
patent: 3016599 (1962-01-01), Perry, Jr.
patent: 3035475 (1962-05-01), Renke et al.
patent: 3041915 (1962-07-01), Ryffel
patent: 3341394 (1967-09-01), Kinney
patent: 3484835 (1969-12-01), Troustine et al.
patent: 3655862 (1972-04-01), Dorschner et al.
patent: 3692618 (1972-09-01), Dorschner et al.
patent: 3704198 (1972-11-01), Prentice
patent: 3705068 (1972-12-01), Dobo et al.
patent: 3755527 (1973-08-01), Keller et al.
patent: 3802817 (1974-04-01), Matsuki et al.
patent: 3817807 (1974-06-01), Braun et al.
patent: 3832267 (1974-08-01), Liu
patent: 3849241 (1974-11-01), Butin et al.
patent: 3851034 (1974-11-01), Harmon et al.
patent: 3853651 (1974-12-01), Porte
patent: 3932682 (1976-01-01), Loft et al.
patent: 3978185 (1976-08-01), Buntin et al.
patent: 4041203 (1977-08-01), Brock et al.
patent: 4064605 (1977-12-01), Akiyama et al.
patent: 4091140 (1978-05-01), Harmon
patent: 4100319 (1978-07-01), Schwartz
patent: 4100324 (1978-07-01), Anderson et al.
patent: 4118531 (1978-10-01), Hauser
patent: 4196245 (1980-04-01), Kitson et al.
patent: 4308303 (1981-12-01), Mastroianni
patent: 4340563 (1982-07-01), Appel et al.
patent: 4343848 (1982-08-01), Leonard, Jr.
patent: 4344999 (1982-08-01), Gohlke
patent: 4379192 (1983-04-01), Wahlquist et al.
patent: 4405297 (1983-09-01), Appel et al.
patent: 4434204 (1984-02-01), Hartman et al.
patent: 4472328 (1984-09-01), Sugimoto et al.
patent: 4508113 (1985-04-01), Malaney
patent: 4546029 (1985-10-01), Cancio et al.
patent: 4609584 (1986-09-01), Cutler et al.
patent: 4618524 (1986-10-01), Groitzsch et al.
patent: 4622259 (1986-11-01), McAmish et al.
patent: 4627811 (1986-12-01), Greiser et al.
patent: 4639949 (1987-02-01), Ales et al.
patent: 4644045 (1987-02-01), Fowells
patent: 4657804 (1987-04-01), Mays et al.
patent: 4663220 (1987-05-01), Wisneski et al.
patent: 4756786 (1988-07-01), Malaney
patent: 4758239 (1988-07-01), Yeo et al.
patent: 4761326 (1988-08-01), Barnes et al.
patent: 4777073 (1988-10-01), Sheth
patent: 4815714 (1989-03-01), Douglas
patent: 4828556 (1989-05-01), Braun et al.
patent: 4863785 (1989-09-01), Berman et al.
patent: 4892779 (1990-01-01), Leatherman
patent: 4904520 (1990-02-01), Dumas et al.
patent: 4943475 (1990-07-01), Baker et al.
patent: 4975469 (1990-12-01), Jacoby et al.
patent: 4978486 (1990-12-01), Ito et al.
patent: 5015521 (1991-05-01), Fuji et al.
patent: 5019422 (1991-05-01), Rose et al.
patent: 5059454 (1991-10-01), Todd et al.
patent: 5089075 (1992-02-01), Sonoda
patent: 5188885 (1993-02-01), Timmons et al.
patent: 5202173 (1993-04-01), Wu et al.
patent: 5344862 (1994-09-01), Nohr et al.
V.A. Wente, "Superfine Thermoplastic Fibers",Industrial and Engineering Chemistry, vol. 48, No. 8, pp. 1342-1346 (1956).
V.A. Wente, et al., "Manufacture of Superfine Organic Fibers" Navy Res. Lab., Wash., D.C., NRL Report 4364 (111437), May 25, 1954 U. S. Department of Commerce, Office of Technical Service.
R.R. Butin, et al., "Melt Blowing--A One-Step Web Process for New Nonwoven Products", Journal of the Technical Association of the Pulp and Paper Industry , vol. 56, No. 4, pp. 74-77 (1973).

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