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Preparation method of microcapsule paper

A technology of microcapsules and paper sheets, which is applied in the direction of microcapsule preparation, microsphere preparation, paper, etc., which can solve the problems of inconspicuous mixing effect, loss of microcapsules, and low filling amount of microcapsules.

Active Publication Date: 2021-04-30
FUJIAN HENGAN HYGIENE MATERIAL +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Conventional microcapsules are mixed with paper, the filling amount of microcapsules is low, and a large

Method used

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  • Preparation method of microcapsule paper
  • Preparation method of microcapsule paper

Examples

Experimental program
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Embodiment

[0024] Softwood and hardwood chemical pulp board, beating degree 40-50°SR; cationic polyacrylamide content 0.03-0.05% mass fraction (retention aid);

[0025] A paper former is used to make thin paper with a basis weight of 15-20g / m2, and the CNF / microcapsule encapsulation system is added between two wet paper webs through the interlayer filling process, and then pressed and dried, using nanocellulose and A large number of hydroxyl groups on the surface of the microcapsules form hydrogen bonds with the upper and lower paper webs, which can not only make the connection between the upper and lower layers tighter, but also allow the microcapsules to be completely filled into the paper without causing a large amount of microcapsules to be lost. to all add fill effects.

[0026] The preparation process of CNF / microcapsule encapsulation system is as follows:

[0027] (1) Mix and stir the nanofibrillated cellulose with a solid content of 1-3% and β-cyclodextrin as the main body (addi...

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PUM

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Abstract

The invention discloses a preparation method of microcapsule paper. Comprising the following steps: 1) making a thin wet paper web with a fixed quantity of 15-20g/m < 2 > by using a paper sheet former; and 2) adding the microcapsule enveloping system between two pieces of wet paper by an interlayer filling process; and 3) preparing high-enveloping microcapsule paper by squeezing and drying processes. The preparation method of the microcapsule enveloping system comprises the following steps: 21) mixing and stirring the nano fibrillated cellulose and the microcapsule taking beta-cyclodextrine as a main body; and forming a CNF/microcapsule dispersion system; 22) at normal temperature, adding a 1-3% lithium acrylate solution into the CNF/microcapsule dispersion system, and carrying out pretreatment for 5-15 minutes; 23) carrying out centrifugal washing on the pretreated CNF/microcapsule dispersion system until the system is neutral; and (24) enveloping microcapsules with the solid content of 10%-15% in the washed CNF/microcapsule dispersion system, and meanwhile, assisting with a synergistic dispersion effect of ultrasonic waves and stirring. The step-by-step enveloping microcapsule pre-enveloping system can enable the filling amount of microcapsules to be far higher than the content of microcapsules in common paper pulp and microcapsule mixed papermaking paper.

Description

technical field [0001] The invention relates to a preparation method of microcapsule paper. Background technique [0002] The addition of microcapsules to paper can endow paper with new functionality. For example, the addition of scented microcapsules in paper can maintain the fragrance of paper for a long time; microcapsules with porous properties can be coated with nanocellulose to make microcapsules highly filled, Enhance the adsorption performance of paper, which has an important application in green packaging or home decoration. [0003] Conventional microcapsules are mixed with paper, the filling amount of microcapsules is low, and a large amount of microcapsules will be lost during the copying process, and the mixed copying effect is not obvious. Contents of the invention [0004] In order to overcome the above defects, the present invention provides a method for preparing microcapsule paper using CNF as a pre-envelope structure, which can greatly increase the con...

Claims

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Application Information

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IPC IPC(8): D21H21/54D21H11/18D21H17/21D21H17/29B01J13/02
CPCD21H21/54D21H11/18D21H17/21D21H17/29B01J13/02
Inventor 宋特吴晓彪隋涛王伟余春柳
Owner FUJIAN HENGAN HYGIENE MATERIAL
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