Japan Atomic Energy Agency

Charito T Aranilla

Masao Tamada

Naotsugu Nagasawa

Akihiro Hiroki

Toshiaki Yagi

A gel manufactured by irradiating ionizing radiation in the range of 5-1000 kGy to an obtained paste compound of a density of 10% by weight or more after adding water to carboxymethyl carrageenan and wherein each gram of dry gel obtained is capable of absorbing 20 grams or more of water. The ionizing radiation may be gamma rays, electron beams or X-rays.

Method of manufacturing gel using polysaccharides as raw materials

After adding water to the carboxymethyl carrageenan which is raw material and mixing them well, the ionizing radiation of more than fixed dose is irradiated to the obtained paste sample of fixed concentration. As a result, an excellent hydrogel in heat resistance which does not dissolve at 50&#xb0; C. or more can be obtained. The manufactured gel can be used for many kinds of products. Because this gel has a biodegradation characteristic, it is possible to dispose by composting.

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Quezon, Philippines

Charito T Aranilla