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High water absorbent wet-strength paper and application thereof

A technology of wet strength paper and high water absorption, applied in the application of high water absorption wet strength paper, high water absorption wet strength paper field, to achieve the effect of low production cost, good wet strength performance, good water absorption and water permeability

Inactive Publication Date: 2012-01-04
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above problems of high dry-laid papermaking binder consumption and high production cost, high wet-laid non-woven fabric binder consumption and large amount of dilution water Problem, the present invention provides a kind of high water-absorbent wet-strength paper that does not require adhesives, is produced by ordinary paper machines, has low cost, and easily recycles waste water generated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Using imported bleached chemical softwood pulp as raw material, with a brightness of 82% ISO, disintegrating the raw material with a hydraulic pulper to obtain component A with a pulp concentration of 4wt%;

[0028] (2) Disintegrate the same batch of bleached chemical softwood pulp with a high-consistency hydraulic pulper, with a pulp concentration of 10%, and treat it with NaOH. The amount of NaOH is 5% of the dry pulp weight, and the temperature is 60°C. , for 1.5 hours, after the treatment, the pulp was washed to pH 7.0 to obtain component B, and the pulp concentration was 4wt%.

[0029] (3) Mix component A and component B, wherein the dry pulp in component A accounts for 40% of the total dry pulp weight after mixing, and add a water absorption aid, which is polyacrylic acid sodium / polyacrylic acid with a pH of 6 A mixture of polyacrylic acid, the molecular weight of both is 3000-3500, the amount of water-absorbing additive is 0.2% of the dry pulp weight, and it ...

Embodiment 2

[0034] (1) Imported bleached chemical hardwood pulp is used as raw material with a brightness of 84% ISO, and the raw material is crushed by a hydropulper to obtain component A, and the pulp concentration of component A is 5wt%;

[0035] (2) Disintegrate the same batch of bleached chemical hardwood pulp with a hydropulper, the concentration of the pulp is 12wt%, and treat it with NaOH. After 1.5 hours, the slurry was washed until the pH was 7.5 to obtain component B after the treatment, and the slurry concentration of component B was 5wt%;

[0036] (3) Mix component A with component B, wherein the dry pulp in component A accounts for 70% of the total dry pulp weight after mixing, and add a water absorption aid, which is polyacrylic acid sodium / polyacrylic acid with a pH of 7 A mixture of polyacrylic acid, the molecular weight of both is 3000-3500, the amount of water-absorbing additive is 1% of the weight of the dry pulp, and it is beaten in a free state by a double-disc refin...

Embodiment 3

[0041] (1) Using bleached chemical hardwood pulp as raw material, with a brightness of 83% ISO, the raw material is crushed with a hydraulic pulper to obtain component A, and the pulp concentration of component A is 4.5wt%;

[0042] (2) Disintegrate the same batch of bleached chemical hardwood pulp with a hydropulper, the concentration of the pulp is 11wt%, and treat it with NaOH, the amount of NaOH is 8% of the dry pulp weight, the temperature is 90°C, After 1.5 hours, the slurry was washed to pH 7.2 to obtain component B after the treatment, and the slurry concentration of component B was 4.5wt%;

[0043] (3) Mix component A and component B, wherein the dry pulp in component A accounts for 45% of the total dry pulp weight after mixing, and add water absorption aid, which is polyacrylic acid sodium / polyacrylic acid with a pH of 6.5 A mixture of polyacrylic acid, the molecular weight of both is 3000-3500, the amount of water absorption aid is 0.4% of the dry pulp weight, and i...

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Abstract

The invention relates to the field of paper making, and discloses high water absorbent wet-strength paper. The high water absorbent wet-strength paper is prepared through the following steps: repulping bleaching chemical pulp to obtain a component A; repulping bleaching chemical pulp, then processing the bleaching chemical pulp through NaOH, washing the processed pulp until a pH value of the processed pulp is 7.0-7.5 to obtain a component B; mixing the component A and the component B, adding a water absorbent assistant agent to carry out beating until the degree of beating is 28-35 DEG SR andthe fiber length is 2-2.5mm; adding a wet strength agent and a retention aid to the beaten pulp, then conveying the resulting mixture to a paper machine to obtain the high water absorbent wet-strength paper. The high water absorbent wet-strength paper is applicable for coating materials of sanitary towels and sanitary protecting pad water absorbent material. According to the present invention, the process of the method is simple; the strength of the paper is mainly achieved through hydrogen bonding between the fibers, the wet strength agent is added to enable the paper to have the wet strength property, the special adhesive is not required, such that the paper has good softness, good wet strength property, good water absorption and good water permeability property, the properties of the paper can compare with the properties of the non-woven fabrics and the dry-method paper, but the production cost is lower than the production costs of the non-woven fabrics and the dry-method paper, and the high water absorbent wet-strength paper is more environmentally-friendly than the non-woven fabrics and the dry-method paper.

Description

technical field [0001] The invention relates to the manufacture of wet-strength paper in the field of papermaking, in particular to a high water-absorbing wet-strength paper, and also relates to the application of the high-water-absorbing wet-strength paper. Background technique [0002] As one of the daily necessities closely related to female consumers, women's sanitary napkins have developed rapidly in recent years due to economic development and changes in people's thinking, cultural concepts and consumption habits. According to statistics, the output of women's sanitary napkins in my country in 2010 It has exceeded 60 billion pieces, and the proportion of ultra-thin sanitary napkins and sanitary pads is also increasing. The liquid-absorbent material of ultra-thin sanitary napkins and sanitary pads is mainly made of superabsorbent resin, which is covered in the middle with a coating material. This requires that the coating material has better wet strength performance, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/14D21C9/00D21C9/02D21D1/02D21H21/20D21H21/00D21H21/10
Inventor 王代启赵传山吴朝军于冬梅
Owner QILU UNIV OF TECH
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