Global Patent Index - EP 2991813 A1

EP 2991813 A1 20160309 - VACUUM PRE-CASTING OF POLYAMIDE POLYMERS

Title (en)

VACUUM PRE-CASTING OF POLYAMIDE POLYMERS

Title (de)

VAKUUMVORFORMUNG VON POLYAMID-POLYMEREN

Title (fr)

PRÉMOULAGE SOUS VIDE DE POLYMÈRES DE POLYAMIDE

Publication

EP 2991813 A1 20160309 (EN)

Application

EP 14725586 A 20140415

Priority

  • US 201361818304 P 20130501
  • US 2014034206 W 20140415

Abstract (en)

[origin: WO2014179056A1] The present disclosure provides methods and apparatuses providing uniform polyamide pellets. In one example, a method can include maintaining a vacuum during a pre-casting polymerization cycle of the cyclic process such that the pre-casting polymerization cycle produces a reactive polyamide polymer with decreased pre-casting polymerization cycle time, extruding the reactive polyamide polymer during a casting cycle by adjusting process parameters including vessel pressure and extrusion valve opening to generate a throughput of extruded polymer, and cutting the extruded polymer at a cutting speed substantially proportional to the throughput to provide polyamide pellets.

IPC 8 full level

B29B 9/12 (2006.01); C08G 69/28 (2006.01)

CPC (source: EP)

B29B 7/72 (2013.01); B29B 7/7461 (2013.01); B29B 9/06 (2013.01); B29B 9/12 (2013.01); C08G 69/28 (2013.01); B29B 7/38 (2013.01); B29B 7/90 (2013.01); B29B 9/14 (2013.01); B29K 2077/00 (2013.01)

Citation (search report)

See references of WO 2014179056A1

Citation (examination)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

WO 2014179056 A1 20141106; WO 2014179056 A8 20141224; CN 104129010 A 20141105; CN 104129010 B 20180417; EP 2991813 A1 20160309; TW 201509993 A 20150316

DOCDB simple family (application)

US 2014034206 W 20140415; CN 201410143884 A 20140410; EP 14725586 A 20140415; TW 103113133 A 20140410