METHOD FOR TESTING PENETRABILITY OF IDENTICAL PRODUCTS Russian patent published in 2005 - IPC

FIELD: measuring and testing technologies.

SUBSTANCE: each product including standard fully impenetrable standard product, identical to tested products, is loaded with pressure by moving piston in cylinder from one position to another pressure at beginning and end of set time is measured, penetrability of tested products is estimated on basis of change of pressure in noted time. Tested products together with piston and cylinder are previously exposed for certain time at temperature of environment until evening of temperatures of piston and cylinder, tested products and standard product, standard product is loaded with pressure P₁ by moving piston in cylinder from one position to another, exposure of standard product under said pressure is performed during set time, and at end of time set pressure P₂ is recorded, and difference between P₁ and P₂ is determined. Then each tested product is performed by pressure by moving piston in cylinder from one position to another and pressure is measured at beginning and end of set time, and penetrability of each tested product is estimated on basis of difference between actual pressure change in each tested device and change of pressure of standard device, while operations with tested products are performed with minimal changes in starting temperature of environment with equal time intervals between tests of products.

EFFECT: higher sensitivity.

1 cl, 1 dwg