A METHOD FOR MANUFACTURING A MOLDED CELLULOSE FIBER BASED PRODUCT FROM AN LC-AND HC-REFINED PULP

• Main Authors: LAMMI, Titta, KARHU, Teemu, RÄSÄNEN, Jari, HEISKANEN, Isto, MIIKKI, Nina
• Format: Patent
• Language: English
• Published: 03.06.2025
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; APPARATUS THEREFOR; IMPREGNATING OR COATING OF PAPER; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PERFORMING OPERATIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS; PULP COMPOSITIONS; REGENERATION OF PULPING LIQUORS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TEXTILES; TRANSPORTING; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKINGMACHINE; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The present invention relates to a method for manufacturing a molded cellulose fiber based product, said method comprising: providing a cellulose pulp composition comprising at least 50 wt% chemical or semi-chemical wood pulp, subjecting the cellulose pulp composition to low consistency (LC) refining at a consistency in the range of 1-7 wt%, dewatering the LC-refined cellulose pulp composition and subject it to high consistency (HC) refining at a consistency in the range of 12-40 wt% with a refining energy of at least 150 kWh/t, diluting the HC-refined cellulose pulp composition to a consistency in the range of 0.1-10 wt%, forming a wet web of the cellulose pulp composition, dewatering the wet web, drying the dewatered wet web to obtain a moldable cellulose fiber based web, and forming a molded cellulose fiber based product from the moldable cellulose fiber based web by deep drawing.