Claims
- 1. A polymeric composition suitable for fabrication into a radio frequency weldable film structure, the composition consisting essentially of a blend of a copolyamide and a polyolefin that has a carboxylic acid anhydride functionality, the blend having a dielectric loss factor of at least 0.05 at a frequency of 27 megahertz at 23° centigrade, the copolyamide being present in an amount with a range of from 20 to 80 percent by weight, based on total blend weight.
- 2. The composition of claim 1, wherein the copolyamide is derived from a dimeric fatty acid.
- 3. The composition of claim 1, wherein the polyolefin has polymerized therein at least one monomer that is an ethylenically unsaturated carboxylic acid anhydride.
- 4. The composition of claim 1, wherein the polyolefin is a base polyolefin having grafted thereto at least one monomer selected from the group consisting of ethylenically unsaturated carboxylic acid anhydrides.
- 5. The composition of claim 4, wherein the base polyolefin is selected from the group consisting of linear low density polyethylene, low density polyethylene, ultra low density polyethylene, copolymers of ethylene and at least one alpha-olefin monomer, linear ethylene/alpha-olefin copolymers, substantially linear ethylene/alpha-olefin copolymers, propylene polymers and copolymers and copolymers of ethylene and less than 30 weight percent, based on copolymer weight, of a polar monomer.
- 6. The composition of claim 5, wherein the polar monomer is selected from the group consisting of vinyl acetate, methyl acrylate, acrylic acid and methacrylic acid.
- 7. The composition of claim 5, wherein the alpha-olefin monomer contains from 3 to 20 carbon atoms.
CROSS-REFERENCE STATEMENT
[0001] This application is a divisional of U.S. application Ser. No. 09/804,114, filed Mar. 12, 2001, which claims benefit of priority from U.S. Provisional Application No. 60/203,715, filed Mar. 12, 2000.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60203715 |
May 2000 |
US |
Divisions (1)
|
Number |
Date |
Country |
Parent |
09804114 |
Mar 2001 |
US |
Child |
10160759 |
May 2002 |
US |