Insulating unit are disclosed which are prepared by a cavity-filling, fast-gelling rigid polyurethane foam based on a formulation comprising a polyol component which contains at least 5 weight percent of an amine-initiated polyols and 1.4 to 4 parts by weight of a catalyst package whereby the catalyst package contains at least one amine catalyst and the weight percent nitrogen present in the amine-initiated polyol to weight percent nitrogen present in the catalyst system is from 2 to 8. The formulation is injected into the cavity and the pressure in the cavity is subjected to reduced atmospheric pressure to achieve the rigid foam having a thermal conductivity of less than about 19 mW/mK at 10 C. average plate temperature.

The invention relates to a biaxially oriented single-layer or multilayer porous film which comprises at least one porous layer and said layer comprises at least one propylene polymer, at least one -nucleating agent and particles, said particles having a melting point of over 200 C. and at most an agglomerate or at most a particle having a particle size of >1 m being detectable on a REM recording of a film sample of 10mm2.

Systems and methods for producing three-dimensional objects from liquid resins are described. The system may mix one or more source material resins with at least one light-curable catalyst(s) to produce a light-curable mixture. One or more of the source materials may include unique physical properties when cured. The various source material resins and the light-curable catalyst may mix within a mixing chamber disposed in a controllable print head. The embodiments of the system can extrude the light-curable mixture from a nozzle and may solidify the mixture by exposing it to a light source. Repeated mixture and extrusion of the light-curable mixture, potentially on top of previous extrusions, may produce a three-dimensional object.