Absorbent paper based on polyacrylic acid type super absorbent composite resin and preparation method of the absorbent paper
A polyacrylic acid type, composite resin technology, applied in the direction of pulping with acid salt/acid anhydride, addition of non-polymer organic compounds, paper, etc., can solve the problem of high cost of waste harmless treatment, groundwater and soil environmental pollution, water absorption Resin particles have poor salt resistance and other problems, achieving excellent economic value and environmental protection value, improving the ability of repeated liquid absorption, and good natural degradation performance.
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[0031] A preparation method for absorbent paper based on polyacrylic acid superabsorbent composite resin, comprising:
[0032] Provide a slurry containing water-absorbent resin, and prepare the slurry in the presence of ethylene glycol dimercaptoacetate and p-nitrobenzyl alcohol, and make a wet surface fiber layer and a wet bottom fiber layer through online papermaking. The above-mentioned water-absorbent resin The particle size is not higher than 0.5 μm, and the water-absorbent resin is a cellulose-based polyacrylic acid superabsorbent composite resin;
[0033] Water-absorbent resin is sprayed on the wet surface fiber layer and the wet bottom fiber layer respectively, and then the above two fiber layers are combined to form a wet paper sheet; and,
[0034] The above wet paper sheet was pressed and dried to obtain absorbent paper.
[0035] The present invention utilizes water-absorbing resin and pulp fibers to prepare water-absorbing paper in two forms of complete mosaic contac...
Embodiment 1
[0055] A preparation method of absorbent paper based on polyacrylic acid type superabsorbent composite resin, comprising the following steps:
[0056] 1) Wash, dry, pulverize and sieve the non-mildewed plant straw, soak it in NaOH solution with a volume concentration of 25% for 10 hours, and degrade it with 3.5mol / L nitric acid solution at 105°C 35min, then washed with water until neutral, dried to obtain straw cellulose, set aside;
[0057] 2) Prepare a NaOH solution with a volume concentration of 30%, add the NaOH solution to acrylic acid in an ice-water bath for neutralization reaction, control the neutralization degree to 77%, and obtain an acrylic acid neutralization solution for use;
[0058] 3) Add 10 times the amount of distilled water to the acrylic acid neutralization solution and straw cellulose, then add acrylamide, liquid silicon dioxide, kaolin, and liquid silicon dioxide, and add the initiator ammonium persulfate and The cross-linking agent N-methylolacrylamide...
Embodiment 2
[0066] A preparation method of absorbent paper based on polyacrylic acid type superabsorbent composite resin, repeating the steps of Example 1, the difference is:
[0067] In step 2), the neutralization degree of the acrylic acid neutralizing solution is controlled to be 75%;
[0068] In step 3), the polymerization reaction temperature is 75°C, the time is 3h, the consumption of kaolin and liquid silicon dioxide are respectively 5.5% and 6.5% of the weight of the acrylic acid neutralizing solution, the dosage of initiator is 0.4wt%, and the dosage of crosslinking agent 0.08wt%;
[0069] In step 4), the weight ratio of wood pulp and straw pulp is 4.5:1, the weight ratio of softwood pulp and hardwood pulp in wood pulp is 1.5:2.5, the pulping concentration is 3.5wt%, and the refining concentration is 4.5wt %;
[0070] In step 5), add 5.5kg / t pulp water-absorbing resin, 50kg / t pulp PPE wet strength agent, 10kg / t pulp alkyl phosphate, 1kg / t pulp ethyl bisthioglycolate to the refi...
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