Abstract: The present invention provides unified multilayer films having at least one layer that includes a flame retardant film layer. In preferred embodiments the flame retardant film layer is an internal layer. In particularly preferred embodiments of the present invention, multilayer films include flame retardant layers alternating with non flame retardant layers. In other preferred embodiments, multilayer films include alternating layers of different flame retardant materials.

Abstract: The present invention provides unified multilayer films having at least one layer that includes a flame retardant film layer. In preferred embodiments the flame retardant film layer is an internal layer. In particularly preferred embodiments of the present invention, multilayer films include flame retardant layers alternating with non flame retardant layers. In other preferred embodiments, multilayer films include alternating layer of different flame retardant materials.

Abstract: Asymmatric, porous polyamide membranes permeable to fluid flow comprising:(A) a porous skin layer, and(B) adjacent to the skin layer, an integral, porous support layer having at least one region comprising a network of substantially parallel, hollow tube-like structures, each of the tube-like structures being oriented such that the longitudinal dimension of each tube-like structure is essentially perpendicular to the skin layer;whereinthe skin layer is relatively thin and dense compared to the support layer,the pore diameters in the skin layer are relatively small compared to the diameters of the tube-like structures in the support layer,in membrances having support layers with more than one region, the cross-sectional area of the tube-like structures is larger in regions located farther from the skin layer, andthe polyamide is an aliphatic polyamide having a glass transition temperature of less than 200.degree. C., and method of making the same.