A vinylpyrrolidone polymer which is little colored, gives off a bad smell little, and contains extremely little impurities is provided. Energy generating elements that generate energy with which a liquid is ejected are formed on the substrate. The material includes a molecular matrix with ionic complexes distributed through the molecular matrix. Due to the higher heater density, a rate of temperature increase in the smaller inner zone of the subsurface exceeds that of the larger outer zone, and a rate of hydrocarbon fluid production ramps up faster in the inner zone than in the outer zone. Such a composition is used to manufacture any of a number of articles, particularly those that come in contact with foods such as foam containers and fruit shock absorber nets as well as packing materials such as loose fill pellets.