(19)
(11) EP 0 333 368 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
27.03.1991 Bulletin 1991/13

(43) Date of publication A2:
20.09.1989 Bulletin 1989/38

(21) Application number: 89302253.3

(22) Date of filing: 07.03.1989
(51) International Patent Classification (IPC)4: D21H 23/04, D21H 17/74
// (D21H17/29, 17:41, 17:49, 17:55, 17:56, 17:62, 17:66, 17:67)
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR IT LI LU NL SE

(30) Priority: 18.03.1988 GB 8806432

(71) Applicant: EKA NOBEL AB
S-445 80 Bohus (SE)

(72) Inventor:
  • Hiskens, Ian Richard
    Downend Bristol BS16 6DT (GB)

(74) Representative: Schöld, Zaid et al
Eka Nobel AB Patent Department Box 11556
S-100 61 Stockholm
S-100 61 Stockholm (SE)


(56) References cited: : 
   
       


    (54) Paper sizing method


    (57) The manufacture of sized paper, by adding a sizing agent and an aluminium compound to paper-making stock or by surface-sizing paper with a pre-blend of the agent and the compound, is carried out at a neutral or alkaline pH, typically a pH above 6, and so that the agent and the compound are added simultaneously to the paper-making stock or are applied simultaneously to the paper surface. If the agent and the compound are used as a one-shot pre-blend, this is made on or immediately before use.





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