UHMW Polyethylene Tape
We're using Ultra-High Molecular Weight Polyethylene (UHMW PE) as the dielectric in our patch antenna. Here's som info on what we're using.
Manufacturer/Distributor
- Manufacturer: Crown Plastics (http://www.crownplastics.com/)
- UHMW PE Mech/Elect. properties: http://www.crownplastics.com/properties.htm?snti=2-1-1
- Manuf. Specs: +/- 10% on thickness (less available on request) http://www.crownplastics.com/specs.htm?snti=2-2
Distributor - Multicraft Plastics 503.288.5131 (contact: Jennifer)
UHMW PE data: TBD (0.062" UHME PE)
- adhesive data: TBD (0.005" acrylic with mylar film)
Glenn's PE density measurement 2004/08/02
Part A: Raw UHMW PE (No adhesive)
ADG: removed adhesive by lifting a corner and slowly peeling - clearly has a mylar film in the acrylic adhesive.
Piece A = 2.005 +/- 0.005 in x 2.008 +/- 0.005 in x 0.062 +/- 0.001 in = 0.250 +/- 0.005 in^3
| Step | Time (PDT) | Description | Weight (g) |
|---|---|---|---|
| A1 | 1259 | Weigh boat A | 6.3840 |
| A2 | 1300 | Tare boat A | 0.0000 |
| A3 | 1301 | Weigh boat + "A" UHMW PE piece (plain, no sticky) | 3.6795 |
Assumed scale +/- 0.0001 g error. Chose to take worst case error (addition, not quadrature addition).
*Density: 0.520 +/- .011 oz/in^3 (0.900 +/- .019 g/cm^3) *
Part B: UHMW PE with adhesive film
Piece B = 2.000 +/- 0.005 in x 4.020 +/- 0.005 in x 0.068 +/- 0.002 in = 0.547 +/ 0.02 in^3
| Step | Time (PDT) | Description | Weight (g) |
|---|---|---|---|
| B1 | 1302 | Weigh boat B | 6.2947 |
| B2 | 1303 | Tare boat B | 0.0000 |
| B3 | 1303 | Weigh boat + "B" UHMW PE piece (with paper) | 8.6372 |
| B4 | 130340 | Remove the paper from "B" and put BOTH!! the paper and PE back in boat | 8.6298 |
| B5.0 | 130400 | Look for VOC's evaporating | 8.6293 |
| B5.1 | 130430 | Look for VOC's evaporating | 8.6293 |
| B5.2 | 130500 | Look for VOC's evaporating | 8.6294 |
| B5.3 | 130530 | Look for VOC's evaporating | 8.6293 |
| B5.4 | 130600 | Look for VOC's evaporating | 8.6294 |
| B5.5 | 130630 | Look for VOC's evaporating | 8.6293 |
| B5.6 | 130700 | Look for VOC's evaporating | 8.6293 |
| C1 | Remove Boat B + B + Paper | -6.2947 |
Of course, we forgot to weigh just the PE. whoops. So on 2004/08/03:
| Step | Time (PDT) | Description | Weight (g) |
|---|---|---|---|
| B1 | 1231 | Weigh boat B | 6.2952 |
| B2 | 1232 | Tare boat B | 0.0000 |
| B3 | 1233 | Weigh boat + "B" UHMW PE piece (without paper) | 8.1215 |
Assumed scale +/- 0.0001 g error. Chose to take worst case error (addition, not quadrature addition).
*Density: 0.524 +/- 0.017 oz/in^3 (0.907 +/- .03 g/cm^3) *