Global patent index - EP 0996787 A1

EP 0996787 A1 2000-05-03 - PAPER PRODUCTS COMPRISING FILLER MATERIALS

Title (en)

PAPER PRODUCTS COMPRISING FILLER MATERIALS

Title (de)

FÜLLMATERIAL ENTHALTENDE PAPIERPRODUKTE

Title (fr)

PRODUITS DE PAPIER A MATIERES DE CHARGE

Publication

EP 0996787 A1 (EN)

Application

EP 98936851 A

Priority

  • US 9814605 W
  • US 5316697 P

Abstract (en)

[origin: WO9904092A1] Composite products having mineral networks polymerized about cellulosic material and a method for making such products are described. One embodiment of the composite product comprises a paper product having a polymerized mineral network, such as a silica/silicate network around, throughout and/or about the cellulosic material instead of having isolated particles of filler material deposited onto, or purposefully bonded to, the cellulosic material. One embodiment of the method comprises providing a mixture comprising cellulosic material, a Group I metal silicate and a Group II metal base or salt. The mixture is then carbonated to produce a product comprising precipitated carbonate filler material and a polymerized mineral network about the cellulosic material. This product is then formed into paper products wherein the ash content can be substantially greater than conventional paper products while maintaining suitable strength properties.

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

D21H 17/70; D06M 11/76; D06M 11/79; D21H 17/28; D21H 23/04; D21H 23/76

IPC 8 full level (invention and additional information)

D06M 11/00 (2006.01); D06M 11/76 (2006.01); D06M 11/79 (2006.01); D21H 17/28 (2006.01); D21H 17/68 (2006.01); D21H 17/70 (2006.01); D21H 23/04 (2006.01); D21H 23/76 (2006.01); D21H 17/67 (2006.01)

CPC (invention and additional information)

D21H 23/04 (2013.01); D21H 23/765 (2013.01); D21H 17/28 (2013.01); D21H 17/675 (2013.01); D21H 17/68 (2013.01); D21H 17/70 (2013.01)

Citation (search report)

See references of WO 9904092A1

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 9904092 A1 19990128; AU 8570998 A 19990210; CA 2296640 A1 19990128; EP 0996787 A1 20000503; JP 2001510251 A 20010731

INPADOC legal status

2007-07-25 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20070201

2007-01-10 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20061117

2004-07-14 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: CIBA SPECIALITY CHEMICALS HOLDING INC.

- Ref Legal Event Code: RAP1

2000-05-03 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000215

2000-05-03 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

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