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Method for reinforcing kraft with micro-nano inorganic crystal whiskers and kraft

An inorganic whisker, micro-nano technology, applied in the field of kraft paper, can solve the problems of small size of micro-nano inorganic whiskers, easy to agglomerate surface dispersion, large specific surface, etc., achieve excellent comprehensive performance, improve papermaking performance, and enhance the toughness effect

Active Publication Date: 2014-02-26
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, micro-nano inorganic whiskers are rarely used in kraft paper at present, mainly due to the small size and large specific surface of micro-nano inorganic whiskers, which cause easy agglomeration and uneven surface dispersion in paper products and "white spots"

Method used

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  • Method for reinforcing kraft with micro-nano inorganic crystal whiskers and kraft
  • Method for reinforcing kraft with micro-nano inorganic crystal whiskers and kraft
  • Method for reinforcing kraft with micro-nano inorganic crystal whiskers and kraft

Examples

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Embodiment 1

[0040] Embodiment 1: a kind of method of the present invention strengthens kraft paper with micronano inorganic whisker, it comprises the following steps:

[0041] (1) Weigh the micro-nano inorganic whiskers with a mass percentage of 8% to 40%, add the micro-nano inorganic whiskers to water, and disperse by stirring or ultrasonic dispersion so that there are no aggregates in the water. At this time, the micro-nano inorganic crystals The whiskers are suspended in water in the form of single fibers, forming a whisker suspension;

[0042] (2) Weighing the modified sol with a mass percentage of 1% to 20%, adding the modified sol to the whisker suspension, and modifying by stirring or ultrasonic to prepare the modified whisker suspension;

[0043] (3) Weighing dry pulp with a mass percentage of 50% to 90%, adding the dry pulp to water for soaking and beating to a certain beating degree, the concentration of the slurry is 1%, adding the modified whisker suspension to the slurry , a...

Embodiment 2

[0061] Embodiment 2: The method of reinforcing kraft paper with micro-nano inorganic whiskers in this embodiment is basically the same as that of kraft paper in Example 1, the difference being that the raw material composition and mass percentage of the kraft paper are:

[0062]

[0063] In this embodiment, the balance is trace moisture and impurities.

Embodiment 3

[0064] Embodiment 3: The method of reinforcing kraft paper with micro-nano inorganic whiskers of the present embodiment is basically the same as that of kraft paper in Examples 1 and 2. The difference is that the raw material composition and mass percentage of the kraft paper are:

[0065]

[0066]

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Abstract

The invention discloses a method for reinforcing kraft with micro-nano inorganic crystal whiskers. The method comprises the following steps of: weighting micro-nano inorganic crystal whiskers, adding the micro-nano inorganic crystal whiskers to water, and stirring for dispersing or ultrasonically dispersing until no aggregates exist in water and the micro-nano inorganic crystal whiskers are of an individual fiber whisker suspension; weighing 1-20wt% of modification sol, adding the modification sol to the crystal whisker suspension, and stirring or carrying out ultrasonic modification to prepare modified crystal whisker suspension; weighing 50-90wt% of dry pulp, adding the dry pulp to water for soaking and pulping until the pulp concentration is 1%, adding the modified crystal whisker suspension to the pulp, diluting the pulp with water until the pulp concentration is reduced to 0.3%, disintegrating for 5000 revolutions, then spreading on a net for papermaking to obtain wet paper page; and drying the wet paper pages with a paper page baker, squeezing, drying and forming. The invention also discloses a kraft prepared by the method.

Description

technical field [0001] The invention relates to the field of modification of micro-nano inorganic whiskers, in particular to a method for reinforcing kraft paper with micro-nano inorganic whiskers and the kraft paper prepared by the method. Background technique [0002] Wood is the main raw material of the paper industry, but my country is a country with an extreme shortage of forest resources. It has long been difficult to get rid of the fact that some pulp fibers are dependent on imports. About half of the paper fiber demand depends on imports. Europe is self-sufficient and North America is a net exporter of paper fiber. Almost all softwood pulp used in domestic production of high-quality kraft paper is imported. Therefore, human beings are taking on more and more important responsibilities to realize the sustainable utilization of forest resources while taking into account the demand for paper. [0003] Dry strength agent is an important class of chemicals in the paper ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/63D21H17/65D21H21/10
Inventor 施利毅张迎冯欣王钢领时雯苗苗
Owner SHANGHAI UNIV
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