Mixed pulp material and cultural paper prepared from the same

A culture paper and mixed pulp technology, applied in natural cellulose pulp/paper, papermaking, textiles and papermaking, etc., can solve the problems of long wood growth cycle, shortage of wood pulp sources, increased cost, etc., and achieve tear index Large, not easy to return to yellow, and reduce the cost of paper

Active Publication Date: 2010-06-30
SHANDONG FUYIN PAPER & ENVIRONMENTAL PROTECTION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the opacity of the paper is relatively good, the wood pulp used is bleached with hydrogen peroxide, which will damage the fibers to a certain extent, and due to the long growth cycle of wood, the source of wood pulp is relatively scarce, and the cost is greatly increased, which limits its use.

Method used

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  • Mixed pulp material and cultural paper prepared from the same
  • Mixed pulp material and cultural paper prepared from the same
  • Mixed pulp material and cultural paper prepared from the same

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0132] 1. Preparation of unbleached straw pulp

[0133] 1, embodiment 1-8 is the embodiment that adopts kraft method to prepare unbleached grass pulp. Among them, the properties of unbleached straw pulp are measured by conventional methods on the pulp obtained after cooking and washing.

[0134] Table 1. Sulfate method

[0135]

[0136] 2. Examples 9-15 are examples of preparing unbleached grass pulp by using the caustic soda method. Among them, the properties of unbleached straw pulp are measured by conventional methods on the pulp obtained after cooking and washing.

[0137] Table 2, caustic soda method

[0138]

[0139] 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.

[0140] 3. Examples 16-22 are examples of preparing unbleached straw pulp by the caustic soda-AQ method. Among them, the properties...

experiment example 1

[0214] This experimental example is a mixed slurry composed of unbleached straw pulp and wood pulp, and the effect of the amount of unbleached straw pulp on fiber tightness and opacity.

[0215] Table 15. Experiments on factors affecting opacity

[0216] Amount of unbleached grass pulp (%)

[0217] As can be seen from Table 15, adding the unbleached straw pulp of 20-85% by weight greatly improves its opacity.

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PUM

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Abstract

The invention provides mixed pulp, which has high loose depth, high opacity and large tearing index. The primary color straw pulp accounts for 15 to 95 percent of the weight of the mixed pulp, the mixed pulp comprises one kind or the free combination of more than two kinds of materials of wood pulp, cotton pulp, bamboo pulp or secondary fiber, the loose depth of the primary color straw pulp is between 1.98 and 2.30 dm<3>/g, the opacity is between 89 and 99 percent, and the tearing index is between 3.5 and 6.0 mN*m<2>/g. The invention also provides cultural paper. The mixed pulp has high loosedepth, high opacity and large tearing index, a pulp material with low cost and simple pulp making process is mixed in the mixed pulp, and paper products made through the papermaking process have the characteristics of loose depth, high opacity, large tearing index of the paper products, soft color, simple and natural effect, simple manufacture process, low manufacture cost and the like.

Description

technical field [0001] The invention relates to a mixed pulp for papermaking, in particular to a mixed pulp with high opacity, high bulk and tear index, and paper made from the mixed pulp. Background technique [0002] In the raw material structure of my country's papermaking industry, raw materials mainly include wood pulp, waste paper pulp and non-wood pulp. With the rapid expansion of production capacity driven by domestic paper demand, the demand for raw materials has grown rapidly. However, due to the long-term rigid scarcity of domestic timber resources, the price of timber continues to rise, and the output of wood pulp is far from meeting the needs of the paper industry. At the same time, because domestic waste paper recycling has not yet reached a large scale and the quality is not as good as the waste paper produced and recycled from raw wood pulp. Therefore, the current paper industry advocates the use of non-wood pulp instead of wood pulp to reduce the cost of pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/12D21C3/02D21C7/00D21H11/00
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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