Preparation method of microcapsule paper

A technology of microcapsules and paper sheets, applied in the directions of microcapsule preparation, microsphere preparation, papermaking, etc., can solve the problems of loss of microcapsules, low filling amount of microcapsules, and insignificant effect of mixing and papermaking, and achieves increased interlayer bonding. the effect of strength

Active Publication Date: 2022-05-10
FUJIAN HENGAN HYGIENE MATERIAL
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Problems solved by technology

[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 effect of mixed copying is not obvious

Method used

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

Examples

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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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Abstract

The invention discloses a preparation method of microcapsule paper. The method comprises the following steps: 1) using a sheet former to make a thin wet paper web with a weight of 15-20g / m2; 2) adding the microcapsule enveloping system between two wet papers through an interlayer filling process, 3) High-enveloping microcapsule paper is prepared by pressing and drying processes; wherein, the preparation method of the microcapsule enveloping system is: 21) Microcapsules with nano-fibrillated cellulose and β-cyclodextrin as the main body Mix and stir; form a CNF / microcapsule dispersion system; 22) at room temperature, add 1-3% lithium acrylate solution to the CNF / microcapsule dispersion system for pretreatment for 5-15min; 23) pretreat the CNF / microcapsule The dispersion system is centrifugally washed to neutrality; 24) Microcapsules with a solid content of 10%-15% are reenveloped in the washed CNF / microcapsule dispersion system, and the synergistic dispersion effect is supplemented by ultrasonic waves and stirring. The step-by-step enveloping microcapsule pre-enveloping system of the present invention can make the filling amount of microcapsules much higher than the content of microcapsules in paper made by mixing common pulp and microcapsules.

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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Patent Type & Authority Patents(China)
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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