METHOD OF MANUFACTURING A PARTICULATE WATER-ABSORBING AGENT COMPOSED PRINCIPALLY OF A WATER-ABSORBING RESIN
First Claim
1. A method for producing a particulate water-absorbing agent comprising:
- a polymerization step for obtaining a polymer gel;
a drying step for drying said polymer gel to obtain a particulate water-absorbing resin;
a classification step for sieving said particulate water-absorbing resin;
a surface cross-linking step for cross-linking the neighborhood of the surface of the particulate water-absorbing resin obtained in the classification step to obtain a particulate water-absorbing agent;
a packaging step for filling a packaging material container with said particulate water-absorbing agent for packaging; and
a transportation step for transporting the products produced in each of the steps to the other steps;
wherein fine powders contained in gas composed principally of air, in any of the steps, can be collected by use of a trapping material.
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Accused Products
Abstract
Provided is a production method for the particulate water-absorbing agent, which can collecting the fine powders generated during the producing process efficiently without worsening working environment, and also the particulate water-absorbing agent produced by the production method thereof. This production method includes (1) a polymerization step for obtaining a polymer gel, (2) a drying step for drying said polymer gel to obtain a particulate water-absorbing resin, (3) a classification step for sieving said particulate water-absorbing resin, (4) a surface cross-linking step for cross-linking the neighborhood of the surface of said particulate water-absorbing resin (5) a packaging step for filling a packaging material container with said particulate water-absorbing agent for packaging and (6) a transportation step for transporting the products produced in each of the steps to the other steps. In this production method, the fine powders contained in gas composed principally of air, in any of the steps, can be collected by use of a trapping material.
36 Citations
21 Claims
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1. A method for producing a particulate water-absorbing agent comprising:
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a polymerization step for obtaining a polymer gel; a drying step for drying said polymer gel to obtain a particulate water-absorbing resin; a classification step for sieving said particulate water-absorbing resin; a surface cross-linking step for cross-linking the neighborhood of the surface of the particulate water-absorbing resin obtained in the classification step to obtain a particulate water-absorbing agent; a packaging step for filling a packaging material container with said particulate water-absorbing agent for packaging; and a transportation step for transporting the products produced in each of the steps to the other steps; wherein fine powders contained in gas composed principally of air, in any of the steps, can be collected by use of a trapping material. - View Dependent Claims (5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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2. A method for producing a particulate water-absorbing agent comprising:
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a polymerization step for obtaining a polymer gel; a drying step for drying said polymer gel to obtain a particulate water-absorbing resin; a pulverization step for pulverizing said particulate water-absorbing resin; a classification step for sieving the particulate water-absorbing resin obtained in the pulverization step; a surface cross-linking step for cross-linking the neighborhood of the surface of the particulate water-absorbing resin obtained in the classification step to obtain a particulate water-absorbing agent; a packaging step for filling a packaging material container with said particulate water-absorbing agent for packaging; and a transportation step for transporting the products produced in each of the steps to the other steps; wherein fine powders contained in gas composed principally of air, in any of the steps, can be collected by use of a trapping material.
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3. A method for producing a particulate water-absorbing agent comprising:
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a polymerization step for obtaining a polymer gel; a drying step for drying said polymer gel to obtain a particulate water-absorbing resin; a pulverization step for pulverizing said particulate water-absorbing resin; a classification step for sieving the particulate water-absorbing resin obtained in the pulverization step; a surface cross-linking step for cross-linking the neighborhood of the surface of the particulate water-absorbing resin obtained in the classification step to obtain a particulate water-absorbing agent; a cooling step for cooling said particulate water-absorbing agent; a granule sizing step for sizing the particulate water-absorbing agent obtained in the cooling step; a packaging step for filling a packaging material container with the particulate water-absorbing agent obtained in the granule sizing step for packaging; and a transportation step for transporting the products produced in each of the steps to the other steps; wherein fine powders contained in gas composed principally of air, in any of the steps, can be collected by use of a trapping material. - View Dependent Claims (8)
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4. A method for producing a particulate water-absorbing agent comprising:
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a polymerization step for obtaining a polymer gel; a drying step for drying said polymer gel to obtain a particulate water-absorbing resin; a pulverization step for pulverizing said particulate water-absorbing resin; a classification step for sieving the particulate water-absorbing resin obtained in the pulverization step; a surface cross-linking step for cross-linking the neighborhood of the surface of the particulate water-absorbing resin obtained in the classification step to obtain a particulate water-absorbing agent; a granule sizing step for sizing said particulate water-absorbing agent; a packaging step for filling a packaging material container with the particulate water-absorbing agent obtained in the granule sizing step for packaging; a transportation step for transporting the products produced in each of the steps to the other steps; a collection step for collecting fine powders contained in gas composed principally of air, in any of the steps, by use of a trapping material; and a granulation step for granulating the fine powders collected by use of the trapping material, the fine powders classified by the classification step, and the fine powders sized by the granule sizing step, to obtain granulated particles; wherein said granulated particles can be charged to any of the steps other than the granulation step.
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Specification