Cellulosic fibre composition

A technology of cellulose fiber and composition, which is applied in the field of cellulose fiber composition, and can solve the problems of low dry solid content, complex methods, and difficult production

Inactive Publication Date: 2013-03-13
AKZO NOBEL CHEM INT BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Modified cellulose fibers such as microfibrillar cellulose can also be difficult to produce and the method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] The cellulose fibers of bleached kraft paper birch pulp are chemically treated and / or mechanically treated and the obtained composition is analyzed. The results are shown in Table 1, where the dry solids content (weight %) of the cellulose fibers in the mechanical treatment is given in parentheses.

[0119] Test numbers 1 and 2 refer to extruded (MT1) cellulose fiber composition.

[0120] Table 1

[0121]

Embodiment 2

[0123] The cellulose fibers of bleached kraft paper birch pulp are chemically treated and / or mechanically treated and the obtained composition is analyzed. The results are shown in Table 2, where the dry solids content (wt%) of the cellulose fiber in the mechanical treatment is given in parentheses.

[0124] Test number 1 refers to the cellulose fiber derived from bleached birch kraft pulp used as a reference. Test numbers 2 and 3 refer to cellulose fiber compositions that have passed through a bead mill once and twice (MT3) for comparison, respectively.

[0125] Table 2

[0126]

Embodiment 3

[0128] The cellulose fibers of bleached kraft paper birch pulp are chemically treated and / or mechanically treated, and the obtained composition is used as an additive in the production of paper / board and analyzed. The results are shown in Table 3, where the dry solids content (weight %) of the cellulose fiber in the mechanical treatment is given in parentheses.

[0129] Test number 1 refers to the cellulose fiber derived from bleached birch kraft pulp used as a reference. Test numbers 2 and 3 refer to cellulose fiber compositions extruded (MT1) at feed rates of 0.8 kg dry solids / h and 1.2 kg dry solids / h, respectively.

[0130] table 3

[0131]

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Abstract

The invention relates to a composition comprising cellulosic fibres having an average degree of substitution of anionic groups of from 0.001 to 0.25, and DEG a length weighted mean fibre length up to 1,100 [mu]m and a length weighted mean fibre width over 10 [mu]m, or DEG a length weighted mean fibre length up to 1,100 [mu]m, and wherein at least 50 % by weight of the cellulosic material is insoluble in water, or DEG a length weighted mean fibre length / width ratio up to 30, or DEG a length weighted mean fibre width over 35 [mu]m. The invention also relates to a composition comprising cellulosic fibres having a specific surface area of at least 1.5 m2/g, a length weighted mean fibre length / width ratio up to 30, and a dry solids content of at least 5 % by weight, based on the weight of the composition, or up to 30 % by weight, based on the total weight of the cellulosic fibres, of cellulosic fibres with a length weighted mean fibre length up to 100 [mu]m. Method of producing a composition comprising cellulosic fibres which comprises subjecting cellulosic fibres to chemical treatment and mechanical treatment, wherein the chemical treatment comprises treating cellulosic fibres with (i) at least one agent containing a carboxyl group, optionally substituted, (ii) at least one oxidant and at least one transition metal, or (iii) at least one nitroxyl radical, and the mechanical treatment comprises subjecting cellulosic fibres to extrusion with a twin-screw extruder or a planetary roller extruder. The invention also relates to a method of producing a composition comprising cellulosic fibres which comprises subjecting cellulosic fibres having an average degree of substitution of anionic groups of from 0.001 to 0.25 to extrusion. The invention also relates to a composition comprising cellulosic fibres obtainable by the methods, a process for producing a cellulosic pulp mixture which comprises mixing the composition with cellulosic pulp, a cellulosic pulp mixture obtainable by the process, and the use of the composition and cellulosic pulp mixture as an additive in the production of paper and board, processes for producing paper and board in which the composition or cellulosic pulp mixture is used, paper and board obtainable by the processes, and various uses of the paper and board.

Description

Technical field [0001] The present invention relates to a cellulose fiber composition, a method for preparing a cellulose fiber composition, the use of a cellulose fiber composition in the production of paper and board, a method for preparing a cellulose pulp mixture using a cellulose fiber composition, and a pulp mixture in Use in the preparation of paper and board, methods for producing paper and board using cellulose fiber composition or pulp mixture, paper and board containing cellulose fiber composition or pulp mixture, and paper and paper containing cellulose fiber composition or pulp mixture Various uses of the board. Background of the invention [0002] Strength is important for cellulosic products such as paper and board, and increasing the strength of these products provides many benefits. For example, increasing the strength of paper can increase filler loading and reduce the amount of fibrils, thus reducing the cost of raw materials in the papermaking process. Simil...

Claims

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Application Information

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IPC IPC(8): D21H11/18D21H15/00D21H15/02D21H15/06B29C48/40B29C48/44B29C48/535B29C48/54B29C48/56B29C48/57
CPCB29C47/6043B29C47/6031B29C47/6025D21H27/10B29C47/6056D21H15/02D21H11/20D21H15/06D21H15/00D21H11/18B27N3/00B29C48/535B29C48/54B29C48/56B29C48/57B29C48/44B29C48/40D21H5/1263D21H5/008D21H5/1236D21H5/1245
Inventor J·詹森A·M·海涅松-许尔滕M·C·P·范艾克B·H·奥G·H·贝耶尔斯R·C·拉伊P·M·范德霍斯特J·尼尔松
Owner AKZO NOBEL CHEM INT BV
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