Bleached needle leaved wood napped pulp board and preparation process thereof
A softwood pulp and fluff pulp technology is applied in the field of pulping and papermaking, which can solve the problems of fluff pulp whose quality and quantity cannot keep up with imports, rarely involving the manufacturing technology of bleached softwood fluff pulp, and unknown production methods.
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Embodiment 1
[0015] 1) First, disintegrate and disperse the bleached softwood pulp in a hydropulper to make a slurry with a mass concentration of 10%;
[0016] 2) Next, the slurry is sent into the softening tank of the mixer, and the softening and raising agent of slurry quality 8% is added, stirred and mixed evenly, and said softening and raising agent is a colorless transparent liquid, and its solid content is 40%. The composition is NaOH and anthraquinone, a fiber protecting agent relative to the mass of 0.5% of NaOH. The softening and raising agent can curl and kink the fiber cells to make the fiber elastic, and can make the surface of the fiber fluff to achieve the effect of fluffing, and at the same time make the fiber become soft. Loose and porous are easier to absorb water, and the residual liquid after the reaction can be recycled and used repeatedly, so it is energy-saving and environmentally friendly;
[0017] 3) Then, when the slurry is heated to 90° C. while stirring, add the ...
Embodiment 2
[0023] 1) First, disintegrate and disperse the bleached softwood pulp in a hydropulper to make a slurry with a mass concentration of 12%;
[0024] 2) Next, the slurry is sent into the softening tank of the mixer, and the softening and raising agent of 10% of the slurry quality is added, stirred and mixed evenly. The said softening and raising agent is a colorless transparent liquid, and its solid content is 38%. The composition is NaOH and anthraquinone, a fiber protecting agent relative to the mass of NaOH, which is 0.8%. The softening and raising agent can curl and kink the fiber cells to make the fiber elastic, and can make the fiber surface fluffy to achieve a fluffy effect, and at the same time make the fiber become soft. Loose and porous are easier to absorb water, and the residual liquid after the reaction can be recycled and used repeatedly, so it is energy-saving and environmentally friendly;
[0025] 3) Then, when the slurry is heated to 75° C. while stirring, add th...
Embodiment 3
[0031] 1) First, disintegrate and disperse the bleached softwood pulp in a hydropulper to make a slurry with a mass concentration of 15%;
[0032] 2) Next, the slurry is sent into the softening tank of the mixer, and the softening and raising agent of 5% of the mass of the slurry is added, stirred and mixed evenly. The said softening and raising agent is a colorless transparent liquid with a solid content of 39%. The composition is NaOH and anthraquinone, a fiber protection agent of 1.0% relative to the mass of NaOH. The softening and raising agent can curl and kink the fiber cells to make the fiber elastic, and can make the surface of the fiber fluff to achieve a fluffy effect, and at the same time make the fiber become soft. Loose and porous are easier to absorb water, and the residual liquid after the reaction can be recycled and used repeatedly, so it is energy-saving and environmentally friendly;
[0033] 3) Then, when the slurry is heated to 60° C. while stirring, add th...
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Abstract
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