公开(公告)号：JPS62146918A

公开(公告)日：1987-06-30

申请号：JP28641185

申请日：1985-12-19

Applicant: TORAY INDUSTRIES

Inventor： HIRAYAMA TAKASHI ,  KATAOBE KOICHI ,  OKAMOTO TSUKASA

IPC: C08G63/18 ,  C08G63/78

Abstract: PURPOSE:To obtain a polyester containing uniform fine particles, which can give a molding of a smooth surface without causing yarn break or the like, by adding a phosphorus compound to a reaction product obtained from a lower alkyl terephthalate and a glycol and adding a specified slurry of CaCO3 to the mixture. CONSTITUTION:A phosphorus compound (e.g., trimethyl phosphate) as a color stabilizer is added to a reaction product obtained by transesterifying a lower alkyl terephthalate component with a glycol. To the polyester reaction prouduct to which said phosphorus compound has been added is added a 10-20wt% concentration slyrry obtained by adding inert inorganic particles such as CaCO3 of an average diameter of primary particle >=10mu in an amount to provide a concentration of 204n40wt% to a (mixed) glycol such as ethylene glycol or its mixture with propylene glycol or the like, kneading the resulting mixture by application of shear in, e.g., a mixer to decrease the content of aggloverates, subjecting the mixture at a concentration of 10-30wt% to dispersion treatment by high-speed agitation by means of a high-speed agitator such as a jet agitator impeller and diluting the mixture.

公开(公告)号：JPH01185355A

公开(公告)日：1989-07-24

申请号：JP1044888

申请日：1988-01-19

Applicant: TORAY INDUSTRIES

Inventor： YAKUSHIJI HIROSHI ,  OKAMOTO TSUKASA ,  SUGAWARA YUMI

IPC: C08J5/18 ,  C08K3/08 ,  C08L67/00 ,  D01F6/62 ,  D01F6/92

Abstract: PURPOSE:To obtain a polyester for fiber or film, improved in its tendency to increase the pressure of filtration by decreasing filter clogging during spinning or film formation, by decreasing the size of an Sb metal particle added to a specified polyester. CONSTITUTION:The title composition comprises a polyester mainly consisting of ethylene terephthalate repeating units, 1-50ppm polygonal Sb metal particles of a major diameter of 0.01-1mu and 10-500ppb of Bi element. Since the Sb metal particles in this composition are fine and uniform, filter plugging during film formation or spinning can be decreased, and the life of filter can be prolonged. When this composition is formed into a film, the number of coarse protrusions on the surface is small and the hue is good. Yarn break can be reduced during spinning and after-processing because the number of coarse particles originating in the Sb metal particles is small, and a fiber product having a good hue and stable quality can be obtained.