Prepare the method for low in hydrolysis polyester granulate and the equipment of preparation polyester granulate from the high viscosity polyester melt

Prepare the method for low in hydrolysis polyester granulate and the equipment of preparation polyester granulate from the high viscosity polyester melt

  • CN 101,842,208 A
  • Filed: 08/22/2008
  • Published: 09/22/2010
  • Est. Priority Date: 08/24/2007
  • Status: Active Application
First Claim
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1. one kind is the method that the high viscosity polyester melt of 132-165 directly prepares the low in hydrolysis polyester granulate from degree of polycondensation PG, and wherein said melt stands predrying and dried/degassed after the thermal cutting method, it is characterized in that:

  • The cutting stage in the described thermal cutting method implements and keeps 8-12 under 70-95 ℃

    water temperature;

    1 liquid-solid ratio [water is to the ratio of pellet/particle], described liquid kept fully until enter predrying device and in predrying device recirculated water in less than 10 seconds, separate.

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