PAPER BASED OF POLYKETONE FIBER, CORE MATERIAL BASED ON POLYKETONE FIBER PAPER FOR CIRCUIT CARDS, AND CIRCUIT CARDS Russian patent published in 2009 - IPC D21H27/12 D21H13/22 H01B3/52 H05K1/03 

FIELD: textile; paper.

SUBSTANCE: polyketone fiber paper and method of its obtainment are intended for circuit card and core material production on the basis of claimed paper for circuit cards. Paper includes aliphatic polyketone fibers with recurrent links of the general formula -CH₂-CH₂-CO- and possibly with other additives and is obtained by wet spinning method. Circuit cards made of the claimed core material show low dielectric properties, stable dimensions, electric insulation properties and can be used for obtainment of homogeneous holes by laser perforation.

EFFECT: improved paper and core material quality due to enhanced durability, elasticity coefficient, stable dimensions, chemical and heat resistance, adhesion, insulating properties, reduced dielectric properties and water absorption, light weight, high porosity and homogeneity.

22 cl, 2 tbl, 7 ex