A kind of pulping production of OCC high-consistency beating and its papermaking method and recycled paper
A production method and high-consistency beating technology, applied in pulp beating/refining method, pulp beating method, papermaking, etc., can solve the problems of low strength, poor pulp and paper properties, short fibers, etc., and achieve folding endurance. The effect of lifting, improved wet paper strength, improved take-up and kink index
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Embodiment 1
[0022] Example 1 Comparison of Specific Index Tests of National Waste, American Waste and European Waste Raw Materials
[0023] The domestic waste, American waste and European waste used in the specific implementation of the present invention are all purchased on the market. The disintegration machine adopted in the present invention is the disintegration equipment commonly used in the field of pulp and papermaking.
[0024] 100% domestic waste OCC is crushed, slag removed, screened and purified, and concentrated to a slurry concentration of 26-30%.
[0025] After soaking the above slurry for 24 hours, use a deflagging machine to decompose until it is uniform, copy it into sheets, balance the water, and then measure its strength index. The quantification of the above copies is 100g / cm 2 Left and right, and the rest of the data are average values after multiple measurements. The specific indicators such as thickness, folding times, burst index and ring pressure index of va...
Embodiment 2
[0033] The morphological characteristic analysis of embodiment 2 national waste OCC fibers
[0034] The fiber analyzer used in this embodiment is a common fiber analysis equipment commonly used in the field of pulp and papermaking.
[0035] The national waste OCC slurry with a concentration of 26-30% in Example 1 was analyzed by a fiber analyzer, and the morphological characteristic parameters of the fibers were measured. The fiber characteristics of domestic waste OCC pulp are shown in Table 2.
[0036] Table 2 National Waste OCC Slurry Fiber Characteristic Parameters
[0037]
[0038] It can be seen from the above table that the weight-average length of long fibers is the highest, which is slightly higher than that of short fibers by 0.2-2mm; the fiber width is basically maintained at about 18-20μm; the number of fiber kinks is about 1200l / m; the proportion of fine fibers is 35-43 %; the broom degree is around 2%.
Embodiment 3
[0039] Embodiment 3 The national waste OCC slurry of embodiment 2 is used for conventional thermal dispersion treatment
[0040] The slurry with a concentration of 26-30% in the above example 1 was subjected to conventional thermal dispersion treatment, and the comparison of data before and after thermal dispersion is shown in Table 3.
[0041] Table 3 Data before and after thermal dispersion of OCC slurry
[0042]
[0043] It can be seen from the comparison of fiber morphology characteristics before and after thermal dispersion of the slurry in Table 3 that after thermal dispersion treatment, the fiber weight-average length and fiber width decreased by about 0.1 mm and 1 μm, respectively, indicating that thermal dispersion treatment has a certain degree of cutting and extrusion. Pressing effect; In terms of curling, kink, fine fiber ratio and degree of brooming, the slurry after thermal dispersion treatment is improved compared with the untreated slurry, except that the cu...
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