(19)
(11) EP 4 385 695 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
21.05.2025 Bulletin 2025/21

(43) Date of publication A2:
19.06.2024 Bulletin 2024/25

(21) Application number: 23211639.2

(22) Date of filing: 23.11.2023
(51) International Patent Classification (IPC): 
B27N 1/00(2006.01)
D21B 1/14(2006.01)
D21H 11/08(2006.01)
 D21B 1/12(2006.01)
D21D 1/20(2006.01)
D21J 1/20(2006.01)
(52) Cooperative Patent Classification (CPC):
D21B 1/12; D21B 1/14; D21D 1/20; D21H 11/08; D21J 1/20; B27N 1/00; B27N 5/00; B27N 3/04; B27N 3/02; B27N 3/08
(84) Designated Contracting States:
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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
KH MA MD TN

(30) Priority: 23.11.2022 FI 20226043

(71) Applicant: UPM-Kymmene Corporation
00100 Helsinki (FI)

(72) Inventors:
  • HEIKKINEN, Jari
    00100 Helsinki (FI)
  • KALLIO, Juha
    00100 Helsinki (FI)
  • LASSILA, Mikko
    00100 Helsinki (FI)

(74) Representative: Berggren Oy 
P.O. Box 16 Eteläinen Rautatiekatu 10A
00101 Helsinki
00101 Helsinki (FI)

   


(54) THERMOMECHANICAL PULP


(57) The invention relates to a method for manufacturing a thermomechanical pulp, the method comprising: conveying wood-based material having a dry matter content between 35% and 65% to a first refiner (R1), refining the wood-based material in the first refiner (R1), wherein a total amount of water added to the refiner(s) is in a range between 700 L and 1800 L per obtained ton of the thermomechanical pulp (3) (by dry weight), and wherein a dry matter content of the obtained thermomechanical pulp (3) is at least 70%. The invention further relates to a wood-based product.







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