High-air-permeability mixed pulp and household paper made thereof
A technology of household paper and mixed pulp, which is applied in the papermaking field and can solve problems such as performance index decline
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[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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