Superabsorbents are metered by a process using a screw conveyor, wherein the superabsorbent is selected, or treated with a cohesion control agent, to have an unconfined yield strength of from 0.75 to 1.5 kPa at consolidation stress of 6 kPa.
대표청구항▼
1. A process for metering superabsorbents wherein a superabsorbent is metered using a screw conveyor and selected, or treated with a cohesion control agent, to have an unconfined yield strength of from 0.75 to 1.5 kPa at a consolidation stress of 6 kPa. 2. The process of claim 1, wherein a single sc
1. A process for metering superabsorbents wherein a superabsorbent is metered using a screw conveyor and selected, or treated with a cohesion control agent, to have an unconfined yield strength of from 0.75 to 1.5 kPa at a consolidation stress of 6 kPa. 2. The process of claim 1, wherein a single screw is used. 3. The process of claim 1, wherein a double screw is used. 4. The process of claim 1, wherein the cohesion control agent is a non-aqueous liquid having a viscosity of at least 20 mPas and not more than 1,000 mPas at 20 ° C. 5. The process of claim 4, wherein the cohesion control agent is at least one agent selected from the group consisting of alcohols, polyglycols, silicon oils, hydrophilic modified silicon oils, and paraffin oils. 6. The process of claim 5, wherein the cohesion control agent is at least one agent selected from the group consisting of 1,2-propylene glycol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, glycerine, polyethylene glycols, polypropylene glycols, polybutylene glycols, silicon oil, and hydrophilic modified silicon oil. 7. The process of claim 6, wherein the cohesion control agent is at least one agent selected from the group consisting of 1,2-propylene glycol, polyethylene glycols with an average molecular weight of less than 1 500 g/mol, silicon oil, and hydrophilic modified silicon oil. 8. The process of claim 4, wherein the cohesion control agent is used in an amount of at least 100 wt.-ppm and at most 5 000 wt.-ppm, based on the total weight of material. 9. The process of claim 5, wherein the cohesion control agent is used in an amount of at least 100 wt.-ppm and at most 5 000 wt.-ppm, based on total weight. 10. The process of claim 6, wherein the cohesion control agent is used in an amount of at least 100 wt.-ppm and at most 5 000 wt.-ppm, based on total weight. 11. The process of claim 7, wherein the cohesion control agent is used in an amount of at least 100 wt.-ppm and at most 5 000 wt.-ppm, based on total weight.
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이 특허에 인용된 특허 (11)
Tsubakimoto Tsuneo (Toyonaka JPX) Shimomura Tadao (Toyonaka JPX) Irie Yoshio (Ashiya JPX) Masuda Yoshihiko (Suita JPX), Absorbent resin composition and process for producing same.
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Pieper Christopher M. (Neenah WI) King Jeffrey W. (Appleton WI) Shafer Bruce R. (Green Bay WI) Stevens Robert A. (Appleton WI) Wehman Timothy L. (Appleton WI) Werner Edward E. (Oshkosh WI), Method for intermittently depositing particulate material in a substrate.
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