(21) Appl. No.: 09/335,401
(22) Filed: Jun. 17, 1999
(51) Int. CI.7 C08F 8/00; C08L 23/00;
C08L 53/00; B32B 15/08; B32B 27/08
(52) U.S. CI 525/88; 525/191; 525/240;
428/461; 428/474.4; 428/483; 428/500;
428/511; 428/515
(58) Field of Search 525/88, 191, 240;
428/461, 474.4, 483, 500, 511, 515, 688
(56) References Cited
U.S. PATENT DOCUMENTS
4,339,507 7/1982 Kurtz et al 428/522
5,147,936 * 9/1992 Peszkin et al 525/240
5,358,792 10/1994 Mehta et al 428/516
5,424,362 6/1995 Hwang et al 525/71
5,674,342 10/1997 Obijeski et al 156/244.11
5,685,128 11/1997 Chum et al 53/441
5,741,861 4/1998 Yamamoto et al 525/240
5,847,284 12/1998 Theller 73/827
6,086,967 * 7/2000 Whiteman et al 428/35.7
Letter from the proprietor of the patent of Jul. 30, 1999.
Communication pursuant to Article 101(2) and Rule 58(1) to (3) EPC dated Mar. 2, 2000.
Exact FactsTM vol. 1, No. 1 (Feb. 1992).
J. Schut, Plastics Technology pp. 15-19, Nov. 1991.
C. S. Speed et al., "Structure/Property Relationships in ExxpolTM Polymers", Polyolefins VII International Conference in Houston, Feb. 24—27, 1991.
Gregory McPike, "Polyolefin Markets and Exxon's "Exxpol" Technology", Presentation to 1992 Dewitt Petrochemical Review in Houston, Texas, Mar. 25-27, 1992.
D. G.F. Van der Sanden, R.E. Halle, "Anew family of linear ethylene polymers provides enhanced sealing performance", Tappi Journal, Feb. 1992, pp. 99-102.
L. Wild et al., "Influence of Long-Chain Branching on the Viscoelastic properties of Low-Density Polyethylenes", Polymer Engineering and Science, vol. 16, No. 12, pp. 811-816 (Dec. 1976).
K. Tominari (Mitsui), "Special Application and Markets for Ethylene Alpha-Olefin Copolymers in Japan", Specialty Plastics Conference '86 (Nov. 13-15, 1986 in Zuerich).
T.I. Butler, "Low Density Polyethylene", Chapter 19A, pp. 453-470 in Film Extrusion Manual-Process, Materials, Properties, TAPPI Press, Atlanta, USA, 1992. (No month).
E. C. Kelusky et al., "Characterizing Polyethylene-Based Blends with Temperature Rising Elution Fractionation (TREF) Techniques", Polymer Engineering and Science, vol. 27, No. 20, pp. 1562-1571 (Mid-Nov. 1987).
* cited by examiner
Primary Examiner—Nathan M. Nutter (57) ABSTRACT
The present invention relates to film layers and compositions having improved hot tack properties. The compositions comprise polypropylene and linear ethylene polymer, substantially linear ethylene polymer or low density ethylene polymer. The compositions are suitable for use as, for example, laminates or films in packaging applications.
36 Claims, 4 Drawing Sheets
