Abstract: A new prepreg material having good tack drape properties and feasible out-time and articles derived therefrom as well as processes for preparation these products are disclosed. The prepreg is prepared by impregnating inorganic fibers with a compostion comprising:(A) fine powder of a metal oxide or oxides having an average particle diameter of not larger than 1 .mu.m,(B) a soluble siloxane polymer having double chain structure,(C) a trifunctional silane compound having at least one ethylenically unsaturated double bond in the molecule thereof,(D) a organic peroxide,(E) a radically polymerizable monomer having at least two ethylenically unsaturated double bonds; and heating the impregnated fibers.

Abstract: A non-inflammable fiber material and a process for producing the same are disclosed, said process comprising the steps of:obtaining thready materials, knitted goods, or woven goods, which are composed of a mixed yarn consisting of polymetaphenylene isophthalamide fibers of thermal decomposition temperature not smaller than 350.degree. C. and rayon fibers, or which are composed of 100 weight parts of a mixed yarn consisting of polymetaphenylene isophthalamide fibers of thermal decomposition temperature not smaller than 350.degree. C. and rayon fibers, and from 20 to 100 weight parts of a polymetaphenylene isophthalamide fiber yarn of thermal decomposition temperature not smaller than 350.degree. C.