Low-whiteness mixed pulp and paper containing the same

A technology of mixing pulp and whiteness, which is applied in the field of pulp and papermaking, can solve problems such as human injury, and achieve the effect of performance improvement

Active Publication Date: 2012-10-03
SHANDONG FUYIN PAPER & ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In addition, enterprises add a large amount of fluorescent whitening agents in pursuit of whiteness, which causes great harm to the human body.

Method used

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  • Low-whiteness mixed pulp and paper containing the same
  • Low-whiteness mixed pulp and paper containing the same
  • Low-whiteness mixed pulp and paper containing the same

Examples

Experimental program
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Effect test

preparation example Construction

[0169] 1. Preparation of unbleached straw pulp

[0170] 1. Examples 1-7 are for the preparation of unbleached straw pulp by the caustic soda method, wherein the properties of the unbleached straw pulp are measured by conventional methods for the pulp obtained after cooking and washing.

[0171] Table 1. Parameters of caustic soda pulping

[0172]

[0173] The unit of bulk thickness in the table is cm 3 / g, air permeability unit ml / min, breaking length unit Km, folding endurance unit N.m / g, tear degree unit mN, tear index unit mN.m 2 / g. The table below is the same.

[0174] 2. In Examples 8-14, the caustic soda-AQ method was used to prepare unbleached straw pulp, wherein the properties of the unbleached straw pulp were measured by conventional methods on the pulp obtained after cooking and washing.

[0175] Table 2. Caustic soda-AQ method pulping parameters

[0176]

[0177] 3. In Examples 15-22, unbleached straw pulp was prepared by kraft method, wherein the proper...

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Abstract

The invention relates to a low-whiteness mixed pulp and paper containing the same. The whiteness of the low-whiteness straw pulp is within 30 to 60%, the preferential whiteness is within 35 to 55%, the more preferential whiteness is within 38 to 50%, and the most preferential whiteness is within 40 to 45%. The invention adopts the low-whiteness straw pulp to match other industrial paper pulp; thelow-whiteness straw pulp is not bleached, which not only changes the white appearance of the traditional paper into yellow (the yellow color can lead people to form an optimal visual environment) andleads the color to be soft as well as beautiful, but also reduces stimulation to eyes by intense reflecting light, thereby lessening visual fatigue and injury to the eyes of a user when in reading and writing. Moreover, the comprehensive performance of the low-whiteness straw pulp is not lowered due to that the straw pulp is not bleached; on the contrary, some performances of the low-whiteness straw pulp are enhanced; therefore, the comprehensive performance of the low-whiteness straw pulp is improved and the performance of the paper is also improved (for example, the looseness, opacity, air permeability and the like), thereby enhancing the deflection of the paper and the like.

Description

technical field [0001] The invention belongs to pulp and papermaking technology, in particular to a low whiteness mixed pulp and paper containing the mixed pulp. Background technique [0002] In recent years, cultural printing papers in my country's market tend to be more and more white, and strive to develop towards pure white, super white and high brightness. In order to make white paper more beautiful, or suitable for some special purposes, it is generally necessary to add a large amount of fluorescent whitening agent and blue and purple dyes to the paper pulp to improve the brightness and aesthetics of the paper. [0003] Many consumers always feel that the whiter the white paper, the better. "Actually, this is a wrong understanding. White paper is not as white as possible." Relevant experts said that too white paper can easily affect eyesight, and some manufacturers often add a large amount of fluorescent agent in order to pursue the whiteness of paper, which will not ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H11/00D21H11/12
Inventor 李洪法宋明信王建民毕衍金徐金香
Owner SHANDONG FUYIN PAPER & ENVIRONMENTAL PROTECTION TECH
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