TREATMENT FOR TEXTILE INSULATION 



227 



cieiUl\' uniform to preserve an electrically balanced circuit. I'Vom 

 Figs. 4, 5, 6 and 7, it is seen that the capacitance and conductance of 

 commercial silk and cotton insulation are greatly reduced by cellulose 

 acetate treatment and that the purilied materials are also improved 



Fig. 



.60 



.52 



.48 



.44 



.40 



36 



32 



<5 .24 



.20 



.12 



OS 



.04 



55 



60 



65 



70 



75 



80 



85 



90 



PERCENT RELATIVE HUMIDITY 

 9 — Transmission loss in 50 feet of twisted pair 22-gauge wire insulated with 



double servings of equal thickness. 



considerably in that respect. It is evident, therefore, that the addition 

 of cellulose acetate treatment to purified textile insulation will result 

 in greater uniformity in the electrical characteristics of the product 

 than is possible by use of purified insulation alone, since the effects of 

 any lack of uniformity in the purified material, due to variable results 



