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Stone paper, calcium carbonate slurry and preparation methods of stone paper and calcium carbonate slurry

A technology of stone paper and calcium carbonate, applied in pulp beating/refining method, pulp raw material addition process, paper coating and other directions, can solve the problems of poor fluidity and dispersibility of calcium carbonate slurry, and meet the requirements of processing technology and viscosity. Controllable, good dispersion uniformity

Pending Publication Date: 2020-12-25
SHANXI YU HAO DRAGON UNION ENVIRONMENTAL PAPER CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved in the present invention is to provide a kind of stone paper, calcium carbonate slurry and preparation method thereof, to solve the technical problem of poor fluidity and dispersibility of the calcium carbonate slurry used for coating stone paper in the prior art

Method used

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  • Stone paper, calcium carbonate slurry and preparation methods of stone paper and calcium carbonate slurry
  • Stone paper, calcium carbonate slurry and preparation methods of stone paper and calcium carbonate slurry
  • Stone paper, calcium carbonate slurry and preparation methods of stone paper and calcium carbonate slurry

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[0026] Such as figure 1 Shown, the embodiment of the present invention discloses a kind of grinding calcium carbonate slurry and preparation method thereof for stone paper coating, it comprises

[0027] Step 1 prepares superfine calcium carbonate powder with a particle size not greater than 6 μm;

[0028] In step 2, the calcium carbonate superfine powder is mixed and sheared and dispersed in a stirring tank to obtain an initial slurry, and the stirring speed is 800rpm / min;

[0029] Step 3: Grinding the initial slurry with a sand mill to obtain calcium carbonate slurry.

[0030] In this embodiment, precise control of the particle size, fineness, viscosity, etc. of the grinding slurry is achieved through the precise control of the stirring speed and the particle size of the ultrafine calcium carbonate powder. The obtained calcium carbonate slurry does not have adverse defects such as precipitation and coarse particles during long-term storage.

[0031] Ground calcium carbonat...

Embodiment

[0039] Use the dry method to grind the ultrafine powder intercepted after calcium carbonate classification to obtain ultrafine powder with a maximum particle size of no more than 6 μm, that is, calcium carbonate ultrafine powder; add water and dispersant in the mixing tank according to the designed slurry concentration, and stir After uniformity, slowly add calcium carbonate superfine powder, the stirring rotor in the mixing tank keeps running at high speed, so that the added powder has a good wetting and dispersing effect, and after stirring for 30 minutes, the preliminary pre-dispersion effect is obtained. Turn on the shear pump to further obtain good shear dispersion for the uniformly mixed slurry, and the stirring rotors run at the same time, and the shear time is controlled at 45min-60min. The sheared and dispersed slurry first enters the grinding stage of the coarse grinding process, and 0.15-0.3% dispersant is added according to the grinding viscosity and particle size i...

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Abstract

The invention provides stone paper, calcium carbonate slurry and a preparation method of the stone paper and the calcium carbonate slurry. The preparation method of the calcium carbonate slurry comprises the following steps of: 1, preparing calcium carbonate ultrafine powder with the particle size of not more than 6 microns; 2, mixing, shearing and dispersing the calcium carbonate ultrafine powderin a stirring tank, to obtain initial slurry, and the stirring speed being 800-1000 rpm / min; and 3, grinding the initial slurry by a sand mill to obtain the calcium carbonate slurry. By accurately controlling the stirring speed and the particle size of the calcium carbonate ultrafine powder, the particle size fineness, viscosity and the like of the ground slurry are accurately controlled. And theobtained calcium carbonate slurry has no adverse defects such as precipitation, particle thickening and the like in the long-term storage process. Through coating application in stone paper and coating appearance detection, the defects of powder falling from paper, particle generation and the like influencing printing are avoided.

Description

technical field [0001] The invention relates to the technical field of stone paper production, in particular to a stone paper, calcium carbonate slurry and a preparation method thereof. Background technique [0002] Stone paper is a new type of material between paper and plastic, which can replace some traditional functional paper, professional paper, and most of the traditional plastic packaging. And it has the characteristics of low cost and controllable degradation, which can save users a lot of cost and will not produce pollution. [0003] If stone paper enters the market through packaging and printing, the printing effect must be involved, and the ink absorption and other indicators meet the requirements. The surface tension of the stone paper substrate itself is low, the adhesion fastness of the direct printing ink is low, and the printing effect is poor. In order to improve the printing effect, corona treatment is carried out on the stone paper substrate to increase...

Claims

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Application Information

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IPC IPC(8): D21H27/00D21H23/22D21D1/20D21H19/38
CPCD21H27/00D21H23/22D21D1/20D21H19/385Y02W30/91
Inventor 姚梁姚强
Owner SHANXI YU HAO DRAGON UNION ENVIRONMENTAL PAPER CO LTD
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