Kathleen D Willham

US Patent:

20010012557, Aug 9, 2001

Filed:

Apr 2, 2001

Appl. No.:

09/824290

Inventors:

Kathleen Diane Willham - Kingsport TN, US
James Rhein - Jonesborough TN, US
Hubertus Jacobus Moolenaar - Dordrecht, NL
George Ellery - Kingsport TN, US
Richard McConnell - Kingsport TN, US

International Classification:

B32B007/02
B32B027/36

US Classification:

428/215000, 428/220000, 428/483000

Abstract:

A heat sealable packaging film producing a peelable seal is formed from a blend of 99 to 75 weight percent of a copolyester and 1 to 25 weight percent of an epoxy-containing impact modifying polymer or a maleic anhydride-containing polymer. The copolyester has a diacid component of at least 50 mole percent terephthalic acid, naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, or mixtures thereof and diol component of about 90 to 35 mole percent ethylene glycol and 10 to 65 mole percent of at least one of diethylene glycol or 1,4-cyclohexanedimethanol.