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Porous filler and its preparation method, and porous filler pulp and paper

A technology of porosity and core particles, which is applied in the field of porous filler and porous filler slurry, can solve the problems of reduced bonding between fibers, increased viscosity, etc., and achieve high surface strength and internal bonding strength, high surface strength and internal bonding strength , the effect of high opacity

Inactive Publication Date: 2007-07-25
OJI PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the interfiber bond (internal bond strength) when mixed into paper decreases, and the viscosity of the liquid containing the porous filler increases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0107] After adding 754 g of 5% sodium sulfate aqueous solution to 263 g of tap water, add commercially available No. 3 sodium silicate aqueous solution 330 g (solid content concentration is 38%) while stirring with a stirrer (Three One Mode). And, at a temperature of 50° C., while stirring with a stirrer (Thriver Motor), add calcium carbonate dispersion A (TP-121 “spindle shape” as core particles, manufactured by Okutama Industry, with a solid content concentration of 9.5%) , recorded as "calcium carbonate A" in the table.) 100 g (10 parts relative to 100 parts of silicon dioxide compound), wherein the average particle diameter of calcium carbonate was adjusted to 0.6 μm with a sand mill. Then, the circumferential speed of the stirring blades was adjusted to 10 m / sec, and 74 g of sulfuric acid (concentration was 20%) was added within 15 minutes to carry out the neutralization of the first step, and then the temperature was raised to 90° C. at the above-mentioned circumferentia...

Synthetic example 2

[0110] The temperature was raised to 90° C., and then 200 g of sulfuric acid was added at this temperature for 40 minutes to neutralize the second step, and a porous filler slurry was obtained in the same manner as in Synthesis Example 1. At this time, the total addition amount of the inorganic acid and the metal salt of the inorganic acid, the pH of the porous filler slurry, the electrolyte concentration, the average particle diameter and standard deviation of the porous filler, the specific surface area of ​​the porous filler, the pore diameter, and the core particle The mass ratios are shown in Table 1.

Synthetic example 3

[0112]The temperature was raised to 90° C., and then 170 g of sulfuric acid was added at this temperature for 40 minutes to neutralize the second step, and a porous filler slurry was obtained in the same manner as in Synthesis Example 1. At this time, the total addition amount of the inorganic acid and the metal salt of the inorganic acid, the pH of the porous filler slurry, the electrolyte concentration, the average particle diameter and standard deviation of the porous filler, the specific surface area of ​​the porous filler, the pore diameter, and the core particle The mass ratios are shown in Table 1.

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Abstract

The present invention provides a porosity filler which is capable of being mixed into paper to improve puff effects and non-transparence of white paper, has appropriate average particle diameter and sharp granularity distribution, and is capable of improving surface intensity and inner coalescent intensity of paper. There is also provided a puff paper having high non-transparence, surface intensity and inner coalescent intensity. The porosity filler in accordance with the present invention comprises core particles and silicon dioxide compounds absorbed to around the core particles, wherein, relative to the silicon dioxide compounds of 100 parts based on mass, the mass proportion of said core particles is 0.1-40 parts; the porosity filler has a specific surface area of 20-200 m2 / g and thin holes having a hole diameter of 0.10-0.80 mu m. The paper in accordance with the present invention contains the porosity filler mentioned above.

Description

technical field [0001] The present invention relates to porous fillers and porous filler slurries for bulking paper. In addition, it also relates to paper mixed with a porous filler. Background technique [0002] From the perspective of saving resources and reducing logistics costs, as well as social demands to improve the environmental protection movement, it is expected to achieve light weight of paper. However, once the weight of the paper is reduced, the thickness of the paper will decrease, the opacity will decrease, and the printed content on the back side will show through. Therefore, there is a problem that not only it is difficult to read, but also the high-quality feeling of the paper is damaged. Therefore, it is required to achieve weight reduction, that is, bulking while maintaining paper thickness. [0003] As a method of bulking paper, for example, a method of appropriately selecting wood pulp as the main raw material of paper, a method of beating pulp, merce...

Claims

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Application Information

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IPC IPC(8): D21H17/68
Inventor 山本学若狭浩之冈田比斗志
Owner OJI PAPER CO LTD
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