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Method for improving apparent density of high-absorptivity resin

A technology of apparent density and high absorbency, applied in the field of preparation of high absorbency resin, can solve problems such as hindering production progress, unstable feeding state, affecting product quality, etc., to achieve the effect of improving apparent density

Pending Publication Date: 2022-07-22
浙江卫星新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the corresponding manufacturing enterprises need more stable and efficient production, but the unstable cutting state of SAP often hinders the production progress and affects the quality of the product. Therefore, it is urgent to improve the apparent density of SAP

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046]A method for increasing the apparent density of superabsorbent resin, comprising the steps of:

[0047] a) In the polymerization process, by reducing the initiation temperature, reducing the amount of initiator, and reducing the monomer concentration, thereby reducing the severity of the reaction and reducing the number of pores in the gel;

[0048] b) In the granulation process, by increasing the amount of granulation water, the aperture of the orifice plate of the granulator is increased, thereby reducing the extrusion force of the gel;

[0049] c) In the process of grinding and screening, the particle size of the product is reduced by adjusting the roller gap and the combination of the screen mesh;

[0050] d) In the process of drying and surface treatment, reduce the moisture content of the product by adjusting the drying temperature and the amount of surface treatment additives.

[0051] In this embodiment, in step a), the initiation temperature is 60°C.

[0052] ...

Embodiment 2

[0059] A method for increasing the apparent density of superabsorbent resin, comprising the steps of:

[0060] a) In the polymerization process, by reducing the initiation temperature, reducing the amount of initiator, and reducing the monomer concentration, thereby reducing the severity of the reaction and reducing the number of pores in the gel;

[0061] b) In the granulation process, by increasing the amount of granulation water, the aperture of the orifice plate of the granulator is increased, thereby reducing the extrusion force of the gel;

[0062] c) In the process of grinding and screening, the particle size of the product is reduced by adjusting the roller gap and the combination of the screen mesh;

[0063] d) In the process of drying and surface treatment, reduce the moisture content of the product by adjusting the drying temperature and the amount of surface treatment additives.

[0064] In this embodiment, in step a), the initiation temperature is 80°C.

[0065]...

Embodiment 3

[0072] A method for increasing the apparent density of superabsorbent resin, comprising the steps of:

[0073] a) In the polymerization process, by reducing the initiation temperature, reducing the amount of initiator, and reducing the monomer concentration, thereby reducing the severity of the reaction and reducing the number of pores in the gel;

[0074] b) In the granulation process, by increasing the amount of granulation water, the aperture of the orifice plate of the granulator is increased, thereby reducing the extrusion force of the gel;

[0075] c) In the process of grinding and screening, the particle size of the product is reduced by adjusting the roller gap and the combination of the screen mesh;

[0076] d) In the process of drying and surface treatment, reduce the moisture content of the product by adjusting the drying temperature and the amount of surface treatment additives.

[0077] In this embodiment, in step a), the initiation temperature is 70°C.

[0078]...

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Abstract

The invention relates to a method for improving the apparent density of high-absorptivity resin, which comprises the following steps: a) in a polymerization process, reducing the initiation temperature, reducing the dosage of an initiator and reducing the monomer concentration, thereby reducing the reaction intensity and reducing the number of pores in gel; b) in the granulation process, the extrusion force of the gel is reduced by increasing the dosage of granulation water and increasing the pore diameter of a pore plate of a granulator; c) in the grinding and screening process, reducing the particle size of the product by adjusting the roller spacing gap of the grinding machine and the screen combination; and d) in the drying and surface treatment processes, the moisture content of the product is reduced by adjusting the drying temperature and the use amount of a surface treatment auxiliary agent. According to the method for improving the apparent density of the high-absorptivity resin, the apparent density of the high-absorptivity resin is effectively improved by adjusting the reaction temperature, the use amount of an initiator, the use amount of granulation water and the use amount of a post-surface treatment auxiliary agent.

Description

technical field [0001] The invention relates to the technical field of preparation methods of superabsorbent resins, in particular to a method for increasing the apparent density of superabsorbent resins. Background technique [0002] Super Absorbent Resin (SAP) is a new type of functional polymer material that can absorb hundreds or thousands of times its own weight in water. Health, medicine, agriculture and forestry, construction, food and other fields. [0003] In recent years, with the enhancement of people's health and hygiene awareness, the rise of sanitary product industries such as baby diapers (sheets), feminine sanitary napkins, and adult diapers (sheets) has greatly promoted the rapid development of the superabsorbent resin industry. Therefore, the corresponding manufacturing enterprises need more stable and efficient production, but the unstable blanking state of SAP often hinders the production progress and affects the quality of products. Therefore, it is urg...

Claims

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Application Information

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IPC IPC(8): C08J3/00C08J3/12C08L33/02C08F220/06C08F222/20C08F2/00B29B9/10
CPCC08J3/00C08J3/12C08F220/06C08F2/00B29B9/10C08J2333/02C08F222/102
Inventor 阮玉林胡霞红杨卫东朱雅亮刘若铎
Owner 浙江卫星新材料科技有限公司
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