Gas separation – Two or more separators – Plies or layers of different characteristics or orientation
Reexamination Certificate
2005-03-29
2005-03-29
Pham, Minh-Chau T. (Department: 1724)
Gas separation
Two or more separators
Plies or layers of different characteristics or orientation
C055S508000, C055S382000, C055SDIG002, C055SDIG005, C015S347000, C096S066000, C096S068000, C264S258000, C264SDIG004, C442S389000
Reexamination Certificate
active
06872233
ABSTRACT:
A vacuum bag media and associated method of production, which includes a first layer that includes an expanded polytetrafluoroethylene membrane and at least one second layer that includes a first component having a first melting point and a second component having a second melting point that is higher than the first melting point, wherein the first layer is attached to the at least one second layer. The second layer can include cellulose material, spunbond, nonwoven fabric, and a thermal bond, nonwoven fabric. Attachment of the first layer of material to the at least one second layer of material can occur through thermobonding, e.g., heated gas, infrared heat and heated calender rolls. The application of adhesives and the use of ultrasonic energy can also bond the layers together. Approximately five percent (5%) to fifty percent (50%) of the first component can be selectively melted for superior airflow. Fibers with sheath and core portions may be utilized for the first component and the second component, respectively.
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Smithies Alan
Zimmerman William C.
BHA Technologies, Inc.
Blackwell Sanders Peper Martin LLP
Pham Minh-Chau T.
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