Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1982-06-30
1984-05-29
Hayes, Lorenzo B.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521134, 521907, 524371, 260DIG24, C08J 900, C08J 902
Patent
active
044515863
ABSTRACT:
Process and apparatus are disclosed for manufacturing foamed articles such as tubes used as pipe insulation, which tubes are of a high impermeability and flexibility and are formed of a polymer, such as polyethylene or polypropylene, containing up to about 25% of an elastomer.
REFERENCES:
patent: 4025465 (1977-05-01), Dorrn et al.
patent: 4323655 (1982-04-01), DiGiulio
patent: 4384032 (1983-05-01), Tashiro et al.
Hahn Granville J.
Rutledge Raleigh N.
Searl Alonzo H.
Caddell Michael J.
Cosden Technology, Inc.
Hayes Lorenzo B.
Nutter Nathan M.
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