-
1.发明授权
公开(公告)号：EP1040158B2
公开(公告)日：2012-04-18
申请号：EP98964150.1
申请日：1998-12-18
申请人： Trexel, Inc.
CPC分类号： C08J9/122 , B29B2911/14326 , B29C44/08 , B29C44/348 , B29C44/60 , B29C47/0021 , B29C47/1063 , B29C47/22 , B29C47/92 , B29C49/0073 , B29C49/04 , B29C2947/92076 , B29C2947/92095 , B29C2947/92314 , B29C2947/92514 , B29C2947/92647 , B29C2947/92685 , B29C2947/92695 , B29C2947/92876 , B29C2947/92895 , B29C2947/92904 , B29K2105/0005 , B29K2105/04 , B29K2105/041 , C08J9/00 , C08J2201/03 , C08J2323/02 , C08J2323/06 , Y10T428/1376 , Y10T428/249977 , Y10T428/249986 , Y10T428/253
摘要： A microcellular injection blow molding system and method, and microcellular blow molded articles produced thereby, are described. The system is equipped to extrude microcellular material that changes in thickness, material density, or both in the machine direction while maintaining a constant pressure drop rate during nucleation just prior to extrusion, providing the ability to produce consistent uniform microcellular material independent of material thickness. The systems and methods are particularly useful in production of strong, thin-walled, non-liquid-permeable, opaque containers that do not contain reinforcing agent, chromophore, or residue of chemical blowing agent or chemical blowing agent by-product. Semi-crystalline microcellular foams that include a midlevel amount of nucleating agent, and methods of their production, also are provided. The microcellular foams can be produced in typical polymer processing techniques such as extrusion, injection molding and blow molding. The foams exhibit excellent mechanical properties and can be formed over a broad range of density into a number of different foam articles. Also provided are high-density polyethylene foams and dies that are suited for use with HDPE, foams.
-
公开(公告)号：EP1183140A2
公开(公告)日：2002-03-06
申请号：EP00935842.5
申请日：2000-04-28
申请人： Trexel Inc.
IPC分类号： B29C44/00
CPC分类号： B29C47/20 , B29C44/348 , B29C47/0026 , B29C47/1063 , B29C47/94 , B29K2105/0005 , Y10T428/249979 , Y10T428/249989
摘要： The present invention provides microcellular articles, as well as methods and apparatuses for producing polymeric foams, and, in particular microcellular material. The methods involve forming a gas blanket within a polymer processing die (72) that prevents contact between the polymer melt and surfaces (106) of the die (72) during extrusion. In one set of embodiments, the gas blanket is provided by gas diffusing out of surfaces of the nucleated polymer material. In other embodiments, the gas blanket is formed by introducing a gas from an external source into the polymer flow channel within the die. The dies, according to the invention, are specially configured to generate and to support the gas blanket. The extruded forms are free of surface defects that, typically, arise from contact between the polymer melt and the die surfaces.
-
3.发明授权
公开(公告)号：EP1040158B1
公开(公告)日：2005-03-02
申请号：EP98964150.1
申请日：1998-12-18
申请人： Trexel, Inc.
CPC分类号： C08J9/122 , B29B2911/14326 , B29C44/08 , B29C44/348 , B29C44/60 , B29C47/0021 , B29C47/1063 , B29C47/22 , B29C47/92 , B29C49/0073 , B29C49/04 , B29C2947/92076 , B29C2947/92095 , B29C2947/92314 , B29C2947/92514 , B29C2947/92647 , B29C2947/92685 , B29C2947/92695 , B29C2947/92876 , B29C2947/92895 , B29C2947/92904 , B29K2105/0005 , B29K2105/04 , B29K2105/041 , C08J9/00 , C08J2201/03 , C08J2323/02 , C08J2323/06 , Y10T428/1376 , Y10T428/249977 , Y10T428/249986 , Y10T428/253
摘要： A microcellular injection blow molding system and method, and microcellular blow molded articles produced thereby, are described. The system is equipped to extrude microcellular material that changes in thickness, material density, or both in the machine direction while maintaining a constant pressure drop rate during nucleation just prior to extrusion, providing the ability to produce consistent uniform microcellular material independent of material thickness. The systems and methods are particularly useful in production of strong, thin-walled, non-liquid-permeable, opaque containers that do not contain reinforcing agent, chromophore, or residue of chemical blowing agent or chemical blowing agent by-product. Semi-crystalline microcellular foams that include a midlevel amount of nucleating agent, and methods of their production, also are provided. The microcellular foams can be produced in typical polymer processing techniques such as extrusion, injection molding and blow molding. The foams exhibit excellent mechanical properties and can be formed over a broad range of density into a number of different foam articles. Also provided are high-density polyethylene foams and dies that are suited for use with HDPE, foams.
-
4.发明公开
公开(公告)号：EP1040158A1
公开(公告)日：2000-10-04
申请号：EP98964150.1
申请日：1998-12-18
申请人： Trexel Inc.
CPC分类号： C08J9/122 , B29B2911/14326 , B29C44/08 , B29C44/348 , B29C44/60 , B29C47/0021 , B29C47/1063 , B29C47/22 , B29C47/92 , B29C49/0073 , B29C49/04 , B29C2947/92076 , B29C2947/92095 , B29C2947/92314 , B29C2947/92514 , B29C2947/92647 , B29C2947/92685 , B29C2947/92695 , B29C2947/92876 , B29C2947/92895 , B29C2947/92904 , B29K2105/0005 , B29K2105/04 , B29K2105/041 , C08J9/00 , C08J2201/03 , C08J2323/02 , C08J2323/06 , Y10T428/1376 , Y10T428/249977 , Y10T428/249986 , Y10T428/253
摘要： A microcellular injection blow molding system and method, and microcellular blow molded articles produced thereby, are described. The system is equipped to extrude microcellular material that changes in thickness, material density, or both in the machine direction while maintaining a constant pressure drop rate during nucleation just prior to extrusion, providing the ability to produce consistent uniform microcellular material independent of material thickness. The systems and methods are particularly useful in production of strong, thin-walled, non-liquid-permeable, opaque containers that do not contain reinforcing agent, chromophore, or residue of chemical blowing agent or chemical blowing agent by-product. Semi-crystalline microcellular foams that include a midlevel amount of nucleating agent, and methods of their production, also are provided. The microcellular foams can be produced in typical polymer processing techniques such as extrusion, injection molding and blow molding. The foams exhibit excellent mechanical properties and can be formed over a broad range of density into a number of different foam articles. Also provided are high-density polyethylene foams and dies that are suited for use with HDPE, foams.
-
-
-
搜索结果
4 条记录 (耗时 0.012 秒)
