Patent ID: 9676121
Date: 2017-06-13
CPC Classifications: B29B,B29K,B29L,C08G,C08J,C08K,C09K,Y10T

Claim:
1. A method for the production of polyamide beads or granules, said method comprising: introducing a polyamide or polyamide-based composition into a granulating device having an underwater pelletizer, wherein the underwater pelletizer comprises a die having die holes with an average diameter ranging from 0.3 mm to 1.7 mm, and a cooling liquid at a temperature ranging from 70° C. to 100° C.; and feeding the polyamide or polyamide-based composition into the die holes at a pressure ranging from 70 bar to 250 bar, wherein the polyamide or the polyamide-based composition is fed into the die holes with establishment of at least 80% of the nominal feed pressure no later than 5 seconds after the start of feeding the die holes with thus molten polyamide or polyamide-based composition.