Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1997-01-31
1998-10-20
Acquah, Samuel A.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
528272, 528307, 528308, 5283086, 525437, 5254445, 524127, 524313, 524318, 524605, 264211, 264291, 428119, 428221, 428357, B32B 300, C08F28300, C08G 6391
Patent
active
058243984
ABSTRACT:
This invention relates to polyester/plasticizer blends which are useful as heat-shrinkable films or sheets in low temperature shrink packaging applications. The heat-shrinkable films or sheets comprise a blend of (A) 90 to 99 weight percent of a polyester having a glass transition temperature of 40.degree. C. to 150.degree. C. and an inherent viscosity of 0.5 to 1.2 dL/g and (B) 1 to 10 weight percent of a plasticizer selected from a C.sub.5 to C.sub.35 monoglyceride prepared from the reaction of glycerol and a fatty acid having 4 to 30 carbon atoms, wherein the combined weights of (A) and (B) total 100 percent. The polyester comprises a dicarboxylic acid component comprising repeat units from at least 80 mole percent of an aromatic dicarboxylic acid having 8 to 14 carbon atoms and a diol component comprising repeat units from at least 10 mole percent of 1,4-cyclohexanedimethanol, based on 100 mole percent dicarboxylic acid and 100 mole percent diol.
REFERENCES:
patent: 4963418 (1990-10-01), Isaka et al.
patent: 4996291 (1991-02-01), Yoshinaka et al.
patent: 5534570 (1996-07-01), Shih et al.
patent: 5589126 (1996-12-01), Shih et al.
Acquah Samuel A.
Eastman Chemical Company
Gwinnell Harry J.
Tubach Cheryl J.
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