摘要:
The present invention relates to methods of making titanium-catalyzed, polyethylene terephthalate resins, preforms, and bottles having reduced comonomer substitution.
摘要:
The invention is a method for the late introduction of inert particulate additives via a reactive carrier to achieve a polyester resin that is capable of being formed into low-haze, high-clarity bottles possessing reduced coefficient of friction. The invention is also a polyester resin that includes between about 20 and 200 ppm of an inert particulate additive, such as surface-modified talc or surface-modified calcium carbonate.
摘要:
The present invention relates to slow-crystallizing, titanium-catalyzed polyethylene terephthalate resins that are useful for making high-strength, high-clarity bottles that possess improved resistance to stress cracking and thermal creep. The polyethylene terephthalate resins possess improved reheating profiles and are especially useful for making polyester articles that have exceptional clarity, dimensional stability, and thermal stability.
摘要:
The present invention relates to slow-crystallizing polyethylene terephthalate resins that possess a significantly higher heating crystallization exotherm peak temperature (TCH) as compared with those of conventional antimony-catalyzed polyethylene terephthalate resins. The polyethylene terephthalate preforms of the present invention, which possess improved reheating profiles, are especially useful for making polyester bottles that have exceptional clarity and that retain acceptable dimensional stability upon being hot-filled with product at temperatures between about 195° F. and 205° F.