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A kind of superabsorbent sheet composite material and its preparation method and application

A composite material, high water absorption technology, used in non-adhesive dressings, dressings, absorbent pads, etc., can solve the problems of airtightness, large space and usage, discomfort, etc., to improve water retention and water retention, and ensure stability. , the effect of thickness reduction

Active Publication Date: 2021-05-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these auxiliary materials need to occupy a large amount of space and usage when combining and compounding water-absorbing powder materials, so the volume and thickness of the water-absorbing materials after shaping often increase, making the products they apply appear bloated as in the early days. Sanitary napkins, diapers and other products, due to the increase in the thickness of the absorbent layer, will cause the product to be uncomfortable, airtight and other defects during application, so the development of ultra-thin, soft, comfortable and breathable water-absorbing layer materials is a one-time hygienic care. Product development trends and requirements

Method used

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  • A kind of superabsorbent sheet composite material and its preparation method and application
  • A kind of superabsorbent sheet composite material and its preparation method and application
  • A kind of superabsorbent sheet composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A superabsorbent sheet composite material, in parts by weight, comprising the following components:

[0054]

[0055] Its preparation process is as figure 1 As shown, the process conditions: the banburying temperature is 120°C; the temperature of the single-screw extruder is 6-zone temperature control: 100 / 120 / 140 / 160 / 160 / 150°C; the calendering triple roll temperature is: 140 / 150 / 130°C; the shaping temperature of the shaping roller is 25°C.

[0056] The prepared calendered composite sheet has a thickness of 85 μm.

[0057] The technical specifications of the superabsorbent sheet composite material prepared in Example 1 are shown in Table 1.

[0058] Table 1

[0059]

[0060] It can be seen from the above test data that the superabsorbent sheet composite material prepared in Example 1 not only has a higher absorbing ratio of physiological saline, but is particularly outstanding in maintaining the ratio of physiological saline.

Embodiment 2

[0062] A superabsorbent sheet composite material, in parts by weight, comprising the following components:

[0063]

[0064] Its preparation process is as figure 1 As shown, the process conditions: the banburying temperature is 160°C; the temperature of the single-screw extruder is 6-zone temperature control: 100 / 120 / 140 / 160 / 160 / 150°C; the calendering triple roll temperature is: 140 / 150 / 130°C; the shaping temperature of the shaping roller is 25°C.

[0065] The prepared calendered composite sheet has a thickness of 500 μm.

[0066] The technical specifications of the superabsorbent sheet composite material prepared in Example 2 are shown in Table 2.

[0067] Table 2

[0068]

[0069] From the above test data, it can be seen that the superabsorbent sheet composite material prepared in Example 2 not only has a higher absorption rate of physiological saline, but is particularly outstanding in maintaining the rate of physiological saline.

Embodiment 3

[0071] A superabsorbent sheet composite material, in parts by weight, at least includes the following components:

[0072]

[0073] Its preparation process is as figure 1 As shown, the process conditions: the banburying temperature is 150°C; the temperature of the single-screw extruder is 6-zone temperature control: 100 / 120 / 140 / 160 / 160 / 150°C; the calendering triple roll temperature is: 140 / 150 / 130°C; the shaping temperature of the shaping roller is 25°C.

[0074] The prepared calendered composite sheet has a thickness of 300 μm.

[0075] The technical indicators of the superabsorbent sheet composite material prepared in Example 3 are shown in Table 3.

[0076] table 3

[0077]

[0078]

[0079] From the above test data, it can be seen that the superabsorbent thin film composite material prepared in Example 3 not only has a higher absorption rate of physiological saline, but is particularly outstanding in maintaining the rate of physiological saline.

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Abstract

The invention discloses a high water absorption sheet composite material, its preparation method and application. The sheet includes the following raw material components in parts by weight: 100 parts of polyvinyl alcohol; 25-60 parts of plasticizer; 0.5-2 parts of glucomannan; 0.3-1 part of carrageenan; 10 parts of superabsorbent resin ‑50 parts; 0.5‑1 part of dispersant; 0.5‑1 part of powder auxiliary dispersant; 0.5‑1 part of slip agent. After the raw materials of each component are measured separately, they are added to the silo of the internal mixer, started up and heated to raise the temperature and blended until the polyvinyl alcohol is completely plasticized, and the material is discharged into the single-screw extruder and extruded into sheets through the die head, and then passed through three stages. Roll calendering, cooling and shaping, trimming, and winding are finished products of super absorbent composite sheet. The superabsorbent sheet composite material not only has a high absorption rate of physiological saline, but also has an excellent performance in the retention rate of physiological saline; it can be used in the fields of health care, agriculture, forestry, civil engineering, petrochemical and other fields.

Description

technical field [0001] The invention belongs to the field of preparation of functional composite materials, and in particular relates to a superabsorbent sheet composite material and its preparation method and application. Background technique [0002] As a functional material, water-absorbent material has the characteristics of absorbing water tens to thousands of times its own weight, and has strong water retention and water holding capacity, and does not produce dehydration or dehydration under external force. , so it is widely used in health care, agriculture, forestry, horticulture, medicine and health, civil engineering, petrochemical and other fields. [0003] Water-absorbent materials can be known from their production methods and processes. Usually, their products are in the form of powders, so in the application field, they generally need to be compounded or combined with other materials to achieve their effective, simple and convenient applications, such as Produ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L5/00C08L101/00C08L71/00C08L67/00C08K13/04C08K7/26C08K5/20C08K13/02C08K3/34C08K3/36C08K3/30C08J5/18A61F13/53A61F13/00A61L15/24A61L15/28A61L15/18A61L15/20A61L15/42A61L15/60
CPCA61F13/00042A61F13/53A61F2013/530481A61L15/18A61L15/20A61L15/225A61L15/42A61L15/60C08J5/18C08K2003/3045C08L29/04C08L2205/025C08L2205/035C08L5/00C08L101/00C08L71/00C08L67/00C08K13/04C08K7/26C08K5/20C08K13/02C08K3/34C08K3/36C08K3/30
Inventor 崔跃飞崔若曦
Owner SOUTH CHINA UNIV OF TECH
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