United States Patent [19] [ii] Patent Number: 4,528,220
Hwo [45] Date of Patent: Jul. 9, 1985
U.S. Patent Jul. 9,1985 Sheet2 of3 4,528,220
[54] PLASTIC BAGS FOR MEDICAL SOLUTIONS AND BLOOD
[75] Inventor: Charles C. Hwo, Sugar Land, Tex.
[73] Assignee: Shell Oil Company, Houston, Tex.
[21] Appl. No.: 578,739
[22] Filed: Feb. 9,1984
[51] Int. CV B65D 30/08
[52] U.S. CI 428/35; 604/408;
428/515; 428/516; 428/347; 428/213; 383/109;
264/176 R
[58] Field of Search 604/408, 409, 410, 212,
604/262; 138/DIG. 24; 383/109, 113, 116; 428/35, 515, 516, 213, 347; 264/176 R
[56] References Cited
U.S. PATENT DOCUMENTS
3,472,369 10/1969 Schuster 206/63.2
4.119.267 10/1978 Kydonieus 229/53
4,125,662 11/1978 Weiner et al 428/213
4,169,910 10/1979 Graboski 383/116
4,252,851 2/1981 Lansbury et al 428/397
4.339.493 7/1982 Weiner 428/516
4.339.494 7/1982 Weiner 428/516
4.339.495 7/1982 Weiner 428/516
4.339.497 7/1982 Weiner 428/516
4.339.498 7/1982 Weiner 428/516
4,391,862 7/1983 Bornstein et al 428/516
Primary Examiner—John E. Kittle
Assistant Examiner—James J. Seidleck
Attorney, Agent, or Firm— Jennifer R. Daunis
[57] ABSTRACT
A package for blood and/or intravenous solutions which is nontoxic, autoclavable, retains its strength when dropped, sufficiently flexible and is of substantially reduced material cost which comprises an outer layer blend of propylene-ethylene copolymer and butene-1-ethylene copolymer, which is laminated to an inner layer blend of butene-1-ethylene copolymer and propylene-ethylene copolymer. The copolymers are random and the thickness ratio of the inner layer blend to the outer layer blend is 4:1.
19 Claims, 6 Drawing Figures
