A kind of paper and its preparation method
A technology for paper and pulp fibers, applied in the field of paper and its preparation, can solve the problems of increasing the cost of papermaking, complicated processes, and decreasing the physical strength of paper, and achieve the effects of increasing hydrogen bonding points, reducing manufacturing costs, and increasing ash content
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preparation example Construction
[0024] The application provides a method for preparing paper, which uses fiber raw materials as attachments and amphoteric starch as a medium substance to convert calcium ions (Ca) in soluble calcium salts through chemical bonds 2+ ) is deposited on the surface of pulp fibers so as to increase the ash content of the paper while improving the strength of the paper, thereby reducing the production cost of the paper.
[0025] see figure 1 , figure 1 It is a schematic flow chart of the first embodiment of the paper preparation method of the present application. Such as figure 1 Shown, in this embodiment, the preparation method of paper comprises the following steps:
[0026] S101: Provide pulp fiber suspension.
[0027] Specifically, the pulp or the mixed pulp of several different pulps is beaten to a certain degree of freeness, and then diluted with water to prepare a pulp fiber suspension with a certain concentration. Wherein, the freeness of the slurry is within the index ...
experiment example 1
[0041] Get freeness and be the APMP slurry of 250ml, add water to prepare the pulp fiber suspension that concentration is 1%, add amphoteric starch under the condition of stirring, wherein amphoteric starch addition is 10kg dry starch / ton of dry APMP slurry, The degree of substitution of cationic groups in the amphoteric starch is 0.07, and the degree of substitution of anionic groups is 0.03, and the stirring is continued to obtain the first mixture evenly. Add CaCl to the first mixture 2 solution, CaCl 2 The concentration of the solution is 15% dry CaCl 2 The addition amount is 5kg / ton dry APMP slurry, continue to stir evenly, obtain the second mixture. The second mixture was copied into paper, and the tensile index, bursting strength and cohesion of the paper were measured. Please refer to Table 1 for the specific test results.
experiment example 2
[0043] Get freeness and be the APMP slurry of 250ml, add water to prepare the pulp fiber suspension that concentration is 1%, add amphoteric starch under the condition of stirring, wherein amphoteric starch addition is 10kg dry starch / ton of dry APMP slurry, The degree of substitution of cationic groups in the amphoteric starch is 0.07, and the degree of substitution of anionic groups is 0.03, and the stirring is continued to obtain the first mixture evenly. Add CaCl to the first mixture 2 solution, CaCl 2 The concentration of the solution is 15% dry CaCl 2 The amount of addition is 8kg / ton dry APMP slurry, continue to stir evenly, obtain the second mixture. The second mixture was copied into paper, and the tensile index, bursting strength and cohesion of the paper were measured. Please refer to Table 1 for the specific test results.
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