1
Sung W Cha, Nam P Suh, Daniel F Baldwin, Chul B Park: Microcellular thermoplastic foamed with supercritical fluid. Massachusetts Institute of Technology, Robert F O Connell, October 27, 1992: US05158986 (201 worldwide citation)

A supermicrocellular foamed material and a method for producing such material, the material to be foamed such as a polymerplastic material, having a supercritical fluid, such as carbon dioxide in its supercritical state, introduced into the material to form a foamed fluid/material system having a pl ...


2
Daniel F Baldwin, Nam P Suh, Chul B Park, Sung W Cha: Supermicrocellular foamed materials. Massachusetts Institute of Technology, Robert F O Connell, August 2, 1994: US05334356 (131 worldwide citation)

A supermicrocellular foamed material and a method for producing such material, the material to be foamed such as a polymerplastic material, having a supercritical fluid, such as carbon dioxide in its supercritical state, introduced into the material to form a foamed fluid/material system having a pl ...


3
Chul B Park, Nam P Suh, Daniel F Baldwin: Method for providing continuous processing of microcellular and supermicrocellular foamed materials. Massachusetts Institute of Technology, Ernest V Dike Bronstein Roberts & Cushman Linek, February 2, 1999: US05866053 (71 worldwide citation)

An extrusion system for providing a foamed material in which a material such as a polymer material is supplied to an extruder for movement through a rotating screw member. The material is placed in a molten state and a foaming agent, such as a supercritical fluid, is introduced into the extruder at ...


4
Chul B Park, Nam P Suh, Daniel F Baldwin: Method for providing continuous processing of microcellular and supermicrocellular foamed materials. Massachusetts Institute of Technology, George W Dike Bronstein Roberts and Cushman Neuner, April 18, 2000: US06051174 (46 worldwide citation)

An extrusion system for providing a foamed material in which a material such as a polymer material is supplied to an extruder for movement through a rotating screw member. The material is placed in a molten state and a foaming agent, such as a supercritical fluid, is introduced into the extruder at ...


5
Chul B Park, Guobin Liu, Fangyi Liu, Remon Pop Iliev, Salvatore D Uva, Benjamin Zhang: Production of foamed low-density polypropylene by rotational molding. Ridout & Maybee, August 15, 2000: US06103153 (29 worldwide citation)

Compositions and processing conditions are disclosed for the production by rotomolding of polypropylene foams, hither to satisfactorily produced only by injection molding and extrusion molding. Rheological properties of the polypropylene resin, processing conditions and choice of composition of the ...


6
Narasimharao Dontula, Jehuda Greener, Cathy A Fleischer, Chul B Park, Patrick C Lee, Jin Wang, Hani E Naguib: Manufacturing process for open celled microcellular foam. Eastman Kodak Company, Lynne M Blank, October 25, 2005: US06958365 (14 worldwide citation)

The present invention relates to a method for making an open celled microcellular foam comprising providing at least one foamable polymer and a crosslinking agent in an extruder, injecting at least one blowing agent into said at least one foamable polymer and said crosslinking agent in said extruder ...


7
Young Wook Kim, Hai Doo Kim, Shin Han Kim, Chul B Park: Highly porous ceramics fabricated from preceramic polymer and expandable microspheres, and method for fabricating the same. Korea Institute of Machinery and Materials, Cooper & Dunham, April 25, 2006: US07033527 (7 worldwide citation)

Disclosed herein are a highly porous ceramic having a high porosity of not less than 60% and a pore density of not less than 108 pores/cm3 fabricated from expandable microspheres and a preceramic polymer, and a method for fabricating highly porous ceramic. The method for fabricating highly porous ce ...


8
Chul B Park, Ghaus M Rizvi, Haiou Zhang: Plastic wood fiber foam structure and method of producing same. Chul Park, Ghaus M Rizvi, Haiou Zhang, Nancy E Hill, Hill & Schumacher, August 30, 2005: US06936200 (4 worldwide citation)

A process for producing plastic/wood fiber composite foamed structures includes the steps of pre-drying wood fiber filler; mixing it with plastic to form a mixture; feeding the mixture into an extruder; introducing and mixing a blowing agent; subject the mixture to high shear forces and extruding th ...


9
Daniel F Baldwin, Nam P Suh, Chul B Park, Sung W Cha: Supermicrocellular foamed materials. Massachusetts Institute of Technology, Dike Bronstein Roberts and Cushman Intellectual Property Practice Group of Edwards & Angell, December 10, 2002: USRE037932

A supermicrocellular foamed material and a method for producing such material, the material to be foamed such as a polymerplastic material, having a supercritical fluid, such as carbon dioxide in its supercritical state, introduced into the material to form a foamed fluid/material system having a pl ...


10
Narasimharao Dontula, Jehuda Greener, Cathy A Fleischer, Chul B Park, Patrick C Lee, Jin Wang, Hani E Naguib: Manufacturing process for open celled microcellular foam. Paul A Leipold, Patent Legal Staff, November 18, 2004: US20040229968-A1

The present invention relates to a method for making an open celled microcellular foam comprising providing at least one foamable polymer and a crosslinking agent in an extruder, injecting at least one blowing agent into said at least one foamable polymer and said crosslinking agent in said extruder ...