Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – To form particulate product
Reexamination Certificate
2004-08-27
2009-12-29
Tentoni, Leo B (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
To form particulate product
Reexamination Certificate
active
07638078
ABSTRACT:
An object of the present invention is to make it possible that: a high-concentration hydrogel sheet, which is suitable for production of high-performance water-absorbent resin particles, is cut efficiently without involving the adhesion to such as cutting-blades; and the subsequent disintegration operation is also successfully carried out; and hydrogel particles excellent in the quality and performances are efficiently produced. As a means of achieving this object, the process according to the present invention for production of hydrogel particles is a process for production of the hydrogel particles14from a high-concentration hydrogel sheet10and comprises: a step (a) of cutting a continuous sheet10of a crosslinked high-concentration hydrogel polymer of 50 to 80 weight % in solid component concentration every 10 to 100 cm lengthwise of the continuous sheet10while running it lengthwise, thereby obtaining cut pieces12; and a step (b) of continuously supplying the cut pieces12(obtained from the step (a)) to a continuous disintegrator40to continuously carry out disintegration and discharge under conditions where the supply amount of the cut pieces12and the disintegrating and discharging abilities of the continuous disintegrator40satisfy (supply amount)≦(disintegrating and discharging abilities), thereby obtaining the hydrogel particles14.
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Fujita Yasuhiro
Hattori Hiroaki
Morita Akihiro
Nogi Kozo
Sakamoto Shigeru
Nippon Shokubai Co. , Ltd.
Roylance Abrams Berdo & Goodman L.L.P.
Tentoni Leo B
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