摘要:
A process and polymer foam composition for removing hydrocarbon material from wanted material containing water by bringing an isocyanate-containing prepolymer and a gaseous expansion agent, with or without a diluent and/or cell control agent, into contact with the materials, allowing the composition to react with the water to form a flexible foam and removing the polymer foam obtained from the wanted material.
摘要:
The method for producing indexable sets of inserts by printing a web in a repeating mode to form successive groups of printed areas, each group of printed areas corresponding to a particular set of inserts, imaging personalized information on at least one printed area of each group, longitudinally severing the webs into ribbons, superposing the ribbons one above another, transversely severing the superposed ribbons forming successively severed inserts, at least one of which serves as an indexing insert having a greater length than the remaining inserts in a particular set of inserts.
摘要:
A process and polymer foam composition for removing hydrocarbon material from wanted material containing water by bringing an isocyanate-containing prepolymer and a gaseous expansion agent, with or without a diluent and/or cell control agent, into contact with the materials, allowing the composition to react with the water to form a flexible foam and removing the polymer foam obtained from the wanted material.
摘要:
A dispensing system for mixing at least first and second components and dispensing an expanding foam is disclosed. The system includes separate vessels, each containing a foam component, and a dispensing apparatus. The dispensing apparatus includes a cartridge assembly mounted on a body assembly. The cartridge assembly includes a mix chamber and first and second ports, each for supplying a foam component to the mix chamber. A pair of adjusting valves is mounted to the cartridge assembly with each valve operable to adjust the flow of each foam component to the mix chamber. A pair of hoses connects the vessels to the cartridge assembly. Each adjusting valve is a variable orifice device in the cartridge assembly having the capability of varying the flow area of the port. The present invention also includes a method for adjustably controlling, at the dispensing apparatus, the flow of each of the first and second components to the mixing chamber to alter their ratio therein. Additionally, the throughput of the dispensing apparatus can be controlled by the variable orifice devices.