High-air-permeability mixed pulp and household paper made thereof
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A technology of household paper and mixed pulp, which is applied in the papermaking field and can solve problems such as performance index decline
Active Publication Date: 2010-06-30
SHANDONG FUYIN PAPER & ENVIRONMENTAL PROTECTION TECH
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[0010] When the content of straw pulp reaches 20%, the paper breaking length reaches the maximum value,
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preparation example Construction
[0198] 1. Preparation of unbleached straw pulp
[0199] 1. Pulping by caustic soda method, grass and other straw materials are prepared, pretreated, cooked, and then squeezed and washed to obtain the high air permeability straw pulp or unbleached straw pulp.
[0200] Table 1. Parameters of caustic soda pulping
[0201]
[0202]
[0203] 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.
[0204] Wherein the straw pulp embodiment 1 is bleached by adding 1 / 8 amount of hydrogen peroxide in the prior art, and the bleaching process refers to any hydrogen peroxide bleaching process in the prior art.
Embodiment 7
[0205] Example 7 is through oxygen delignification, and the oxygen delignification process also refers to any oxygen delignification method in the prior art.
[0206] 2. Examples 8-14 are examples of preparing unbleached grass pulp by using the caustic soda-AQ method. Grass and other straw raw materials are prepared, pretreated, cooked, and then squeezed and washed to obtain the high air permeability straw. pulp or unbleached grass pulp.
[0207] Table 2, pulping parameters of caustic soda-AQ method
[0208]
Embodiment 12
[0209] Example 12 is oxygen delignified straw pulp.
[0210] 3. Examples 15-22 are examples of preparing unbleached straw pulp by using the sulfate method. Grass and other straw materials are prepared, pretreated, cooked, and then squeezed and washed to obtain the high air permeability straw pulp Or unbleached grass pulp.
[0211] Table 3. Kraft pulping parameters
[0212]
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Abstract
The invention relates to high-air-permeability mixed pulp, which contains high-air-permeability straw pulp. The mixed pulp contains 10-100 percent of high-air-permeability straw pulp and 0-90 percent of other pulp by weight percent. Preferably, the weight percent of the high-air-permeability straw pulp is 30-97 percent and the weight percent of other pulp is 3-70 percent. More preferably, the weight percent of the high-air-permeability straw pulp is 51-95 percent and the weight percent of other pulp is 5-49 percent. The most preferably, the weight percent of the high-air-permeability straw pulp is 71-93 percent and the weight percent of other pulp is 7-29 percent. The other pulp is one or more of wood pulp, bamboo pulp, cotton pulp and secondary fiber. Preferably, the wood pulp and the bamboo pulp are selected. The mixed pulp has the advantages that the drainage capacity is good, the high-speed paper machine can be used during papermaking and the production efficiency is further improved.
Description
technical field [0001] The invention relates to the field of papermaking, in particular to a high air permeability mixed pulp and the household paper prepared therefrom. Background technique [0002] The shortage of raw materials is one of the three major problems faced by the world's paper industry, and this problem is particularly prominent in my country's paper industry. The development of non-wood fiber raw materials for pulping and papermaking is one of the effective ways for my country's paper industry to solve the shortage of raw materials and reduce environmental pollution. [0003] However, at the same time, China faces the problem of straw disposal every year. China is a large planting country of grass crops such as wheat and rice, and a large amount of straw is produced every harvest season. At present, most people burn straw and put it into the river to reduce the pressure of a large amount of straw piles. [0004] The harm caused by straw burning and straw en...
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IPC IPC(8): D21H11/00D21C3/02
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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