Abstract:
The present invention relates to a composition comprising microfibrillated cellulose, mono-, di- or oligo-saccharides and a pigment in order to achieve a composition with improved rheological properties such as a low viscosity even at high dry content. The present invention further relates to process for the production of said composition.
Abstract:
A process for treating cellulosic fibres comprises mechanically pre-treating the fibres followed by treating the fibres with an enzyme and thereafter mixing the fibres with a solution comprising an alkali metal hydroxide followed by mechanically treating the fibres to form microfibrillated cellulose. In this way it is possible to produce microfibrillated cellulose (MFC) in an improved and energy efficient way.
Abstract:
The present invention relates to a method for manufacturing a highly refined cellulose composition, comprising:i) providing a fiber fraction comprising 20-100 wt% fibers obtained from used beverage cartons (UBC) based on the total dry fiber weight of the fiber fraction, ii) optionally subjecting the fiber fraction to mechanical, chemical or enzymatic pretreatment, or a combination thereof,iii) subjecting the optionally pre-treated fiber fraction to refining at a consistency in the range of 0.5-30% by weight to a Schopper-Riegler (SR) in the range of 50-100, as determined by standard ISO 5267-1, to obtain the highly refined cellulose composition.
Abstract:
The present invention relates to a method for manufacturing a purified fiber fraction from used beverage carton (UBC), said method comprising the steps:a) subjecting a UBC starting material to a polymer and aluminum film separation method to obtain a UBC polymer and aluminum fraction and a raw UBC fiber fraction;b) optionally subjecting the raw UBC fiber fraction to a coarse screening method to remove coarse particles;c) subjecting the raw UBC fiber fraction to a fine screening method to remove cellulose fines and fine particulate contaminants, wherein the fine screening method comprises at least one fine screening step and at least one dilution step; d) optionally subjecting the fine screened UBC fiber fraction to a bleaching method;e) subjecting the fine screened, and optionally bleached, UBC fiber fraction to an electro-osmosis method to remove further contaminants;f) optionally subjecting the fine screened, and optionally bleached, UBC fiber fraction to a dewatering method to a consistency of at least 20 wt%; and g) subjecting the optionally dewatered UBC fiber fraction to a deactivation method to obtain a purified UBC fiber fraction.
Abstract:
The present invention relates to a method for preparing a surface-treated gas barrier film, said method comprising the steps of: a) providing a gas barrier substrate comprising at least 50 wt% of a highly refined cellulose pulp based on dry weight; and b) surface treatment of the gas barrier substrate, wherein the surface treatment comprises treating a surface of the gas barrier substrate with a solution comprising an organic acid and sodium carbonate and drying the gas barrier substrate to obtain a surface-treated gas barrier film. The invention further relates to a surface-treated gas barrier film obtained according to the method and a packaging laminate comprising the surface-treated gas barrier film.