EPDM packaging system and method

EPDM packaging system and method

  • CN 105,008,435 B
  • Filed: 03/14/2014
  • Issued: 03/13/2020
  • Est. Priority Date: 03/15/2013
  • Status: Active Grant
First Claim
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1. A process for packaging pellets comprised of ethylene/propylene/diene polymer comprising:

  • introducing pellets consisting of an ethylene/propylene/diene polymer comprising at least 65% by weight of units derived from ethylene into a mixing device, the pellets having a residual moisture content of from 500ppm to 2500 ppm;

    adding a silica-based powder to the mixing device in an amount of 3000ppm to 10,000ppm based on the total weight of the ethylene/propylene/diene polymer pellets and the silica-based powder, the silica-based powder comprising amorphous silica;

    coating at least a portion of the pellets with the silica-based powder;

    sealing a bulk amount of the coated pellets in a bag made of a flexible polymeric film;

    absorbing the residual moisture from the pellets with the silica-based powder; and

    preventing moisture condensation inside the bag for a period of time from 7 days after the sealing step to 1000 days after the sealing step.

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