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High-water-absorption napkin and preparation method thereof

A napkin, high water absorption technology, applied in the field of high water absorption napkin and its preparation, can solve the problems of weak water absorption and fragility, and achieve the effect of excellent flexibility and strength

Inactive Publication Date: 2022-01-07
泗县舒怡纸业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a super absorbent napkin and its preparation method to solve the problem of weak water absorption of traditional napkins and fragile after absorbing water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of modified cationic polyacrylamide:

[0024] A1. After mixing 0.5g emulsifier and 40g deionized water evenly, under stirring, add 30g silica sol and stir evenly, adjust the pH value of the solution to 8.5 with hydrochloric acid with a mass fraction of 10%, and then dropwise add 1g KH- 570, after the addition is complete, stir at room temperature for 12 hours to obtain a modified silica sol emulsion, the emulsifier is nonylphenol polyoxyethylene ether, the silica sol is alkaline silica sol, the pH is 9-9.5, and the mass fraction of silica 30%;

[0025] A2. Under nitrogen atmosphere, after heating to 78°C, add 40g of acrylamide, 5g of dimethyl diallyl ammonium chloride and 20g of allyl glycidyl ether dropwise to 13g of the modified silica sol emulsion prepared in step A1 The mixture of two thirds of the initiator solution was added dropwise synchronously (the initiator solution was made by mixing 0.8g ammonium persulfate and 8g deionized water), the rate of ...

Embodiment 2

[0027] Preparation of modified cationic polyacrylamide:

[0028] A1. After mixing 1g emulsifier and 50g deionized water evenly, under stirring, add 35g silica sol and stir evenly, adjust the pH value of the solution to 8.5 with 10% hydrochloric acid, and then add 2g KH-570 dropwise After the dropwise addition is complete, stir at room temperature for 12 hours to obtain a modified silica sol emulsion, the emulsifier is nonylphenol polyoxyethylene ether, the silica sol is alkaline silica sol, the pH is 9-9.5, and the mass fraction of silica is 35%;

[0029] A2. Under a nitrogen atmosphere, after heating to 78°C, add 65g of acrylamide, 15g of dimethyl diallyl ammonium chloride and 40g of allyl glycidyl ether dropwise to 21g of the modified silica sol emulsion prepared in step A1 The mixture, synchronously drop two-thirds of the initiator solution (the initiator solution is made by mixing 2g ammonium persulfate and 20g deionized water), the rate of addition is 3 drops / second, and...

Embodiment 3

[0031] A preparation method of superabsorbent napkin, comprising the following steps:

[0032]Step 1. Preparation of mixed pulp: 70g of raw pulp, 0.1g of cationic starch and 0.5g of trialkyl phosphate were decomposed for 20,000 rpm with a fiber dissociator to obtain mixed pulp, wherein the raw pulp contained the following raw materials in weight percentage: 8% Straw pulp, 70% wood pulp, and the balance wood pulp;

[0033] Step 2, copying: add 0.4g of the modified cationic polyacrylamide prepared in Example 1 and 7g of silica sol to 100g of mixed pulp, beat the pulp at 2000 rpm for 8min, and copy it into a quantitative 20g / m 2 Paper sheets, then pressed with a press for 5 minutes to obtain wet paper;

[0034] Step 3. Drying: Dry the wet paper with a drum dryer, wrinkle it with a scraper, and curl it into a roll to obtain a high-absorbent napkin.

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PUM

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Abstract

The invention relates to a high-water-absorption napkin and a preparation method thereof, and belongs to the technical field of napkins. The napkin comprises the following raw materials: mixed pulp, modified cationic polyacrylamide and silica sol, and the modified cationic polyacrylamide is prepared by taking a modified silica sol emulsion as a seed emulsion, adding three monomers of acrylamide, dimethyl diallyl ammonium chloride and allyl glycidyl ether and performing free radical polymerization. A molecular chain of modified cationic polyacrylamide has a net-shaped structure by utilizing a net-shaped structure of silica sol, then epoxy groups are introduced by utilizing allyl glycidyl ether, and the modified cationic polyacrylamide has an interpenetrating network structure under the action of a cross-linking agent, so that the modified cationic polyacrylamide has wet reinforcing property; and silica sol and allyl glycidyl ether are introduced, so that the water absorption performance and the strength are enhanced. Therefore, the water absorption and the wet tensile strength of the napkin are improved.

Description

technical field [0001] The invention belongs to the technical field of napkins, and in particular relates to a superabsorbent napkin and a preparation method thereof. Background technique [0002] Napkins are sanitary products that people have close contact with and use more frequently in daily life, and we usually use dry napkins, which have been used to replace handkerchiefs or towels. Toilet paper, paper towels, etc. [0003] When traditional napkins are used, their water absorption effect is average, resulting in poor wiping effect, and cannot wipe off the moisture on the surface of objects well. Moreover, traditional napkins are easily damaged and produce debris after being soaked in water, which affects the use of users. [0004] Disclosed a kind of napkin paper with good water absorption as Chinese patent CN211834152U, comprise base layer, be provided with fixed net 1 on one side of base layer, one side of fixed net 1 is provided with water-absorbing layer 1, fixed n...

Claims

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Application Information

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IPC IPC(8): D21H27/00D21F13/00D21H25/04D21H25/00C08F292/00C08F220/56C08F226/02C08F216/14
CPCD21H27/00D21F13/00D21H25/04D21H25/005C08F292/00C08F220/56C08F226/02C08F216/1416
Inventor 邱肖陈晓燕谢亚军
Owner 泗县舒怡纸业股份有限公司
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