FIELD: manufacture of insulating materials. SUBSTANCE: dielectric constant of frothed insulating material is measured as function of volume of granular insulating material introduced in mold. Granular insulating material is introduced in mold in volume found from dependence obtained for desired dielectric constant. Linear dimensions of mold are not to exceed 3-5 cm. In the course of frothing, mold is rotated about horizontal axis. EFFECT: improved quality of material obtained. 2 cl
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