Global Patent Index - EP 1045748 A2

EP 1045748 A2 2000-10-25 - METHOD AND DEVICE FOR PRODUCING GRANULES OF POLYMER MATERIALS

Title (en)

METHOD AND DEVICE FOR PRODUCING GRANULES OF POLYMER MATERIALS

Title (de)

VERFAHREN UND VORRICHTUNG ZUM HERSTELLEN VON GRANULATEN AUS POLYMEREN WERKSTOFFEN

Title (fr)

PROCEDE ET DISPOSITIF POUR LA PRODUCTION DE GRANULATS EN MATERIAUX POLYMERES

Publication

EP 1045748 A2 (DE)

Application

EP 99957986 A

Priority

  • DE 19850885 A
  • EP 9908403 W

Abstract (en)

[origin: WO0027603A1] The invention relates to a method for producing granules of polymer material. The inventive method comprises the following steps: plasticising the polymer, dividing the plasticised masses into individual strands, cutting the individual strands into granules, cooling of the granules in a coolant and separating the coolant from the granules in a first drying process. The granules then undergo at least one elution process in a washing solution and the washing solution is then separated from the granules in at least one further drying process. In the first drying process, the granules are preferably subjected to high mechanical stress in a sieve bend comprising a downstream centrifugal drier. Tails of the granules are cut off by said mechanical stress. The further drying process is carried out carefully, i.e. it avoids abrasion to a large extent. In a preferred embodiment, the additional drying process comprises a sieve bend having a downstream fluidised-bed drier, shaft drier or vacuum drier.

IPC 1-7 (main, further and additional classification)

B29B 9/06; B03B 5/00; B07B 1/00; B08B 3/04; B08B 3/06; B08B 3/08; B08B 3/10; B29B 13/04; B29B 13/06

IPC 8 full level (invention and additional information)

B29B 9/06 (2006.01); B29B 9/16 (2006.01); B29B 13/06 (2006.01); B29K 101/00 (2006.01)

CPC (invention and additional information)

B29B 13/065 (2013.01); B29B 9/065 (2013.01); B29B 9/16 (2013.01)

Citation (search report)

See references of WO 0027603A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 0027603 A1 20000518; WO 0027603 B1 20000706; DE 19850885 C1 20000720; EP 1045748 A2 20001025; JP 2002529271 A 20020910

INPADOC legal status


2003-09-03 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20030301

2002-12-04 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20021018

2001-05-02 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: COPERION WAESCHLE GMBH & CO. KG

2001-03-07 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010108

2000-10-25 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE