Method of spinning fibres or extrusion, and the products obtained
a technology of extrusion and fibres, applied in the direction of fibre chemical treatment, yarn, artificial thread manufacturing machines, etc., can solve the problems of inferior performance, local weakening of fibres, and the maximum value reported for individual cellulose fibres liberated from wood, so as to achieve a high degree of alignment of constituents
Inactive Publication Date: 2019-01-31
RISE INNVENTIA AB
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Benefits of technology
The present invention provides a method for preparing strong and stiff fibers or films using a dispersion of long-chained polymer(s) or non-spherical particles. The method involves hydrodynamically aligning the constituents of the dispersion using a central flow dispersion and surface-charge controlled gel transition. The resulting fibers have a high degree of alignment of the constituents. The method can be carried out using a spinning fibers or extrusion process, and the resulting fibers or sheets have a uniform orientation distribution and different orientations in different layers. The technical effects of the invention include improved strength and stiffness of fibers or films, as well as a more uniform orientation distribution.
Problems solved by technology
However, the properties obtained are far from the maximum values reported for individual cellulose fibres liberated from wood.
Regarding approach 1 a, high shear or strain within the fibre, in the gelled or partly gelled state can cause local weakening of the fibre and thus inferior performance.
Method used
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[0050]As noted above, the present invention relates to a continuous, scalable and parallelizable method for preparing strong and stiff fibres (filaments) or films. The fibre or film is prepared by utilizing hydrodynamically induced alignment of the constituents of a dispersion in combination with surface-charge controlled gel transition to produce fibres with a high degree of alignment of the constituents (polymer(s), fibrils etc.).
[0051]Accordingly, in accordance with the invention there is provided a method of spinning fibres or extrusion, comprising:
[0052]a) Injection of a central flow dispersion comprising long-chained polymer(s) or non-spherical particles into a central flow channel of a reaction chamber;
[0053]b) Acceleration of the central flow in the reaction chamber by at least two opposite, aligning flow streams, essentially perpendicular to the central flow, whereby the long-chained polymer(s) or non-spherical particles are aligned in the flow direction; and
[0054]c) Gellin...
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Abstract
The invention relates to a continuous, scalable and parallelizable method for preparing strong and stiff fibres (filaments) or films. The fibre or film is prepared by utilizing hydrodynamically induced alignment of the constituents of a dispersion in combination with surface-charge controlled gel transition to produce fibres with a high degree of alignment of the constituents (polymer(s), fibrils etc.). The invention also relates to the fibres or films so formed.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of U.S. application Ser. No. 14 / 437,406, filed Apr. 21, 2015, which is a national stage application of International Application PCT / SE2013 / 051227, filed Oct. 22, 2013, which claims the benefit of U.S. Provisional Application No. 61 / 716,905, filed Oct. 22, 2012, all of which are hereby incorporated by reference.FIELD OF INVENTION[0002]The present invention relates to the field of spinning or extruding fibres or films, and in particular to a method of manufacturing an oriented fibre or film. The invention also pertains to the fibre or film manufactured.BACKGROUND[0003]Many biological materials show impressive and controllable properties that are determined by their micro and nanostructure. Cellulose fibres extracted from wood and spider silk represent two excellent examples. The main constituent of cellulose fibres is the nano-scale fibril, which has the prospective of being a building block for future hi...
Claims
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Login to View More IPC IPC(8): D01D5/06D01F4/00D01D5/14D01D5/40C01B32/158D01F2/00D01F9/14D01D5/38C01B32/16
CPCD01D5/06D01F4/00D01D5/14D01D5/40C01B32/158D01F2/00D10B2101/122D01F9/14D01D5/38C01B32/16D01F2/24D01D13/02D01D5/0046
Inventor SODERBERG, DANIELLUNDELL, FREDRIKFALL, ANDREASHAKANSSON, KARLKVICK, MATHIASWAGBERG, LARS
Owner RISE INNVENTIA AB