PROCESSO DE FABRICACAO DE MATERIAL EM FORMATO DE FOLHA DE ESPUMA,申请号BR19909003603-传众专利搜索

PROCESSO DE FABRICACAO DE MATERIAL EM FORMATO DE FOLHA DE ESPUMA

申请公布号：BR9003603(A)

申请号：BR19909003603

申请日期：1990.07.25

申请公布日期：1991.12.17

申请人：

OWENS-ILLINOIS PLASTIC PRODUCTS INC

发明人：JAMES A. KARABEDIAN;MAURICE W. BLACKWELDER

分类号：B29C47/00;B29C44/00;B29C44/34;B29C44/50;B29C44/56;B29C47/06;B29C47/14;B29K25/00;B29K105/04;B29L7/00;C08J9/12;C08L25/00;C08L25/06

主分类号：B29C47/00

摘要：The method of making polystyrene foam for foam products which comprises utilizing atmospheric gases as the blowing agents or preferably mixing one or more of these gases and a blending agent which is non-volatile at the extrusion temperatures, introducing the mixture to a molten thermoplastic polystyrene resin containing nucleating agents such as sodium bicarbonate and citric acid and extruding the thermoplastic in the form of a foam. The resultant foam has substantially no residual blowing agent, is dimensionally stable at ambient temperatures and when used with a non-volatile blending agent can be made with small amounts of blowing agent permitting cooling of the melt without high loading on the extruder. The foam may be coextruded with one or more layers of thermoplastic film so that the resultant product is adapted for use for plates, cups, food containers or packaging and for labels for containers such as glass and plastic containers and for labels that are shrunk in place on a container. <IMAGE>