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1 Operated under vacuum impregnation may extend the longevity of the applied product with good appearance and electricity, as well as comply UL-94V0 fire-resistance standard.

2 Vacuum impregnation is a technology to modify materials or reach some special demand as the effect of vacuum and impregnation.

3 The basic principle of vacuum impregnation technique, material to be used, technological process are briefly introduced. The illustrative diagram of vacuum impregnation has been given.

4 The current situation and characteristic of vacuum impregnation process and equipment in refractory industry in China are analyzed and introduced.

5 The metallography samples fabricated by the vacuum impregnation of resin are introduced.

6 The product is applied with a vacuum impregnation process that removes air from the pores and then fills the pores with this liquid sealant.

7 It is adaptable to vacuum plating. Gaseous drying of kerosene vacuum impregnation, vacuum drying. Dehydration,(www.Sentencedict.com) vacuum metallurgy and so on.

8 Furthermore, it was found that the microwave pre-drying was better than that of the hot-air pre-drying, both in the mass of vacuum impregnation and in the loss of nutrients.

9 The carbon fiber fabric was impregnated much better by epoxy resin in RTM process than in vacuum impregnation process.

10 A key technological process to power capacitor manufacture is vacuum impregnation, and the quality of impregnation can only be guaranteed by using good vacuum impregnating equipment.