Global Patent Index - EP 0971800 A1

EP 0971800 A1 2000-01-19 - METHOD OF IRRADIATION OF POLYMER FILMS BY AN ELECTRON BEAM

Title (en)

METHOD OF IRRADIATION OF POLYMER FILMS BY AN ELECTRON BEAM

Title (de)

VERFAHREN ZUM BESTRAHLEN VON POLYMERFILMEN MIT EINEM ELEKTRONENSTRAHL

Title (fr)

PROCEDE D'IRRADIATION DE FILMS POLYMERES PAR UN FAISCEAU D'ELECTRONS

Publication

EP 0971800 A1 (EN)

Application

EP 98908975 A

Priority

  • RU 97104016 A
  • US 9804324 W
  • US 98726697 A

Abstract (en)

[origin: WO9842453A1] The method of irradiating polymer films by an electron beam comprises a two-stage application of an accelerated electron beam on sections of moving polymer film until the preset radiation dose has been absorbed. The duration of the set time interval between the end of treatment Stage one and the beginning of treatment Stage two of the initially irradiated film is not less than 500 msec. The set dose accumulated by each section of the film in Stage one is sufficient to alter the polymer film material from a free molecular state to a cross-linked state characterized by the formation of 3-dimensional molecular structures having a greater molecular mass.

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

B05D 3/06

IPC 8 full level (invention and additional information)

B29C 71/04 (2006.01); B29C 35/08 (2006.01)

CPC (invention and additional information)

B29C 71/04 (2013.01); B29C 2035/0877 (2013.01); B29C 2791/001 (2013.01); B29K 2023/06 (2013.01)

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

WO 9842453 A1 19981001; AU 6687498 A 19981020; CA 2276670 A1 19981001; EP 0971800 A1 20000119; EP 0971800 A4 20010822

INPADOC legal status


2002-08-14 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020129

2001-10-31 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010918

2001-08-22 [A4] SUPPLEMENTARY SEARCH REPORT

- Effective date: 20010706

2001-08-22 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A4

- Designated State(s): DE FR GB IT

2001-08-22 [RIC1] CLASSIFICATION (CORRECTION)

- Free text: 7B 05D 3/06 A, 7B 29C 71/04 B

2000-01-19 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991018

2000-01-19 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB IT