Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Patent
1994-10-12
1995-08-29
Acquah, Samuel A.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
528272, 528275, 528296, 528301, 528302, 264165, B29C 4700
Patent
active
054457785
ABSTRACT:
There is disclosed a method for the production of aliphatic copolyester film.
The method comprises the steps of: applying esterification or ester-interchange to a reaction mixture of at least one acid component selected from the group consisting of succinic acid, succinic anhydride and succinic acid ester, 1,4-butanediol as a main diol component, 2,2-dimethyl-1,3-propanediol of 1 to 30% by mole based on the mole of the acid component, multifunctional compound 0.01 to 1% by mole, based on the mole of the acid component, multifunctional compound have more than three functional group of hydroxy group or carboxy group at below 220.degree. C., so as to give an oligomer mixture; polycondensing the oligomer into an aliphatic copolyester at a temperature of 240.degree. to 260.degree. C. under reduced pressures of not more than 1 mmHg in the presence of a catalyst; and melt-extruding the aliphatic copolyester using T die.
Improved in draw ratio, the aliphatic copolyester film provided by the method can be applied to various applications, such as films, bottles, glass fiber-reinforced plastics, adhesives, paints.
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Ihm Dae W.
Kim Dae J.
Kim Young J.
Lee Chang S.
Lee Myung S.
Acquah Samuel A.
Cheil Synthetics Inc.
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