Abstract
We are studieing to make a suitable nylon denture before two years, the first report were written in 19541), but this time we have produced by way of experiment a new type injection machine for purpose to make nylon dentures. (See Photo 1) This apparatus have a spraying press of ten tons working pressure. The material used was Amilan (6-Nylon), which was manufactured by Toyo Rayon Co, in Tokyo.The amilan chip is heated in the apparatus to a temperature of 250°C and while liquid, sprayed into the flask and pressed by motor oil pressure. The flasks are special types as they have to withstand the high pressur on the one hand, and must be provided with a filling hole on the other as photo 3. Hard plaster must be used for embedding. The result of experiment were succesfull for dimentions of amilan denture, and it can be well placed in oral. But from the result of using it after about three month, we found out the discoloration of amilan denture in oral. Amilan product has also great expansibility by sorption of water. Therefore we concluded that the amilan was not suitable for denture.Then we should like to study about other polyamid plastics better than Amilan.
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