To provide a lubricating film-forming agent (aqueous lubricating agent for plastic processing) capable of forming a uniform lubricating film that exhibits more excellent wettability than conventional ones and hardly suffers from deterioration in wettability even when contaminated with an oily component, and to provide a formation method of a lubricating film where a lubricating film-forming agent deteriorated by contamination with an oily component is reutilized.
The aqueous lubricating agent for plastic processing comprises a solid lubricating agent, water for dispersing the solid lubricating agent and a cationic surfactant for charging the surface of the solid lubricating agent with positive electricity. The formation method of the lubricating film is one for forming a lubricating film on the surface of a raw material for plastic processing or the surface of a tool for plastic processing, where a cationic surfactant is added to the deteriorated liquid of the lubricating film-forming agent having been subjected to the formation of the lubricating film and contaminated with an oily component thereby to charge the surface of the solid lubricating agent with positive electricity and the thus-obtained liquid is reutilized as the lubricating film-forming agent.
TSUCHIYA YOSHINARI
SHINJO MUTSUO
NAKAKOSHI KAZUTO
AICHI STEEL WORKS LTD
Next Patent: PHENOLIC RESIN, EPOXY RESIN, EPOXY RESIN COMPOSITION, AND CURED PRODUCT THEREOF