Kabushiki Kaisha Kobe Seiko Sho

Kabushiki Kaisha Kobe Seiko Sho (kobe Steel, Ltd.)

Kazuko Saka

Kazuhisa Fujisawa

Yasuaki Yamane

Tatsuya Tanaka

Koichi Fukushima

Tomoji Takahashi

In the case of thickening a feed resin without pre-drying, a device is taught to enhance the thickening effect. The device includes a chamber having a mixing rotor therein for continuously mixing a resin between a feed port and a discharge port . A plurality of vent ports connected to vacuum pumps are provided for reducing the pressure in the chamber. An element, e.g. a screw feeder , is provided for introducing a viscosity-increasing chemical agent into the chamber. The screw feeder is isolated from the reduced pressure areas of the chamber by elements , e.g. reverse screw flights of the rotor. In operation, feed resin from a hopper enters the chamber through port and is dehydrated while being continuously mixed in a drying section via vents . After addition of the chemical agent, the resin is continuously mixed in a thickening section while being deaerated.

Method for continuously mixing polyester resins

A polyester resin is thickened in a chamber by first introducing the feed resin through a port and dehydrating in a drying section under reduced pressure. A chemical agent is then added to the dehydrated feed resin and mixed therewith in a thickening section The mixing occurs while deaerating under reduced pressure. The chemical agent functions to either increase the viscosity of the feed resin or suppress the lowering thereof.

Method for thickening a polyester resin

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Kobe, Japan

Kazuko Saka