Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
【発明の名称】ポリエチレンテレフタレート
Document Type and Number:
Japanese Patent JP3205350
Kind Code:
B2
Abstract:
PURPOSE:To obtain the title polymer having specific physical properties, not damaging flavor and fragrance of contents packed into a container in the case of use of the polymer as a material for the container for filling up drink because of a small amount of acetaldehyde increased when it is molded. CONSTITUTION:The objective polymer which is a polyethylene terephthalate having 0.5 or more dl/g intrinsic viscosity and 1.37 or more g/cm<3> density and has W0-W1 of 0-60ppm when acetaldehyde (AA) content of molded article prepared by injection molding the polymer at 290 deg.C is W0ppm and AA content of molded article obtained by injection molding the polymer, which is immersed in hot water at 95 deg.C for 8 hours and dried, as mentioned above, is W1ppm. The polymer is obtained by esterifying a raw material in a slurry, subjecting the esterified substance to liquid-phase polycondensation in the presence of a germanium dioxide compound catalyst and a stabilizer, preliminarily crystallizing the reaction product, subjecting to solid-phase polycondensation and finally bringing the obtained granular polymer into contact with water, steam, etc.

More Like This:
WO/2020/048862BICYCLE FRAME
Inventors:
Shigeru Shiraki
Yasuhiro Tanaka
Satoshi Katsuyuki
Application Number:
JP6469991A
Publication Date:
September 04, 2001
Filing Date:
March 28, 1991
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
Mitsui Chemicals, Inc.
International Classes:
B29C45/00; B29C49/00; B29C49/06; B29C49/64; B29D7/00; B29D22/00; C08G63/181; C08G63/183; B29K67/00; B29L22/00; (IPC1-7): C08G63/183
Domestic Patent References:
JP54149793A
JP5655426A
JP5716024A
JP60127322A
JP764920B2
Attorney, Agent or Firm:
Shunichiro Suzuki