1. Project No DripPrototype Presentation Jacqueline Greene Michele Dufalla Tania Chan April 5, 2007

2. Initial Design Schematic H2O container cork Clamp with attached rubber plug Inside container Container wall

3. New Goal + http://www1.istockphoto.com/file_thumbview_approve/1168596/2/istockphoto_1168596_plastic_can_container.jpg, http://www.baproducts.com/spigot.jpg

4. Plastic Containersfrom: http://www.singaplastics.com/images/JerricanFullShotJ.jpg

5. Hot Plate Welding(from Joining of Plastics by Jordan Rotheiser (2nd ed.)

6. Method http://www.cooking.com/images/products/shprodde/743196.jpg, http://www.flagstaff.az.gov/images/pages/SC581/plastic%20bag.JPG

7. Plastic Welding Applications • Thermoware, Toys and Games • Files, Folders, Writing instruments • Automobiles filters, floats, batteries, clutch cables, reflectors • Pump Housing and Impellers • Electrical switches and switchgears, connectors, steam iron jackets,energy meters • Surgical masks, Drip Chambers • Computer Floppies, Printer Ribbons • Watches, Novelty and Gift items • Audio and Video Cassettes From: http://www.rooptelsonic.com/plasticweldapplication.html

8. Sample Preparation • Hot Plate- insufficient heat to weld plastics together without melting & warping exterior layers, variable temperature • Oven- insufficient heat to weld plastics together, variable temperature • Iron- variable temperature but only manner that works- needed a movable heat source to join plastics together, measured temperature with a thermocouple

9. Shear Test 1/8” HDPE 4 layers of clear LDPE film (0.0006”) 3x1 in contact area 1/8” HDPE

10. Black opaque vs clear LDPE Low-Density Polyethylene (LDPE)Plain BackFilm Thickness .006"Thickness Tolerance ±.0006"Length 25'Length Tolerance ±12"Width 6'Width Tolerance±4"Film Type :Tear ResistantFilm Application: Window Coverings and Vapor Barriers and Construction FilmOpaque BlackOperating Temperature Range: -75° to +160° FSoftening Point:180° FPerformance Characteristic: Weather ResistantTensile Strength:1700 psi, (machine direction); 1200 psi, (traverse direction) Low-Density Polyethylene (LDPE)Film Thickness.006"Thickness Tolerance .0012"Length 25'Length Tolerance1/2"Width10'Width Tolerance1/8"Film Type Multipurpose (Visqueen)Film Application:Window Coverings and Vapor Barriers and Construction Film Translucent with White TintOperating Temperature Range: -60° to +150° F

13. Water pressure testing:Apparatus • Test the water sealing properties of the LDPE “glue” • Test the strength of the LDPE “glue”

14. Water pressure testing:Experimental setup

15. Water pressure testing:Results

16. Next Steps in Water pressure testing Higher water pressure • Force of 40 gallons of water: 392N • Pressure of 40 gallons of water on a 5/8” diameter tube: 2MPA ≈ 300psi Longer pressure tests • Can the seal withstand days of pressure? Effects of chlorine and impurities in the water on the seal • Chlorination in the clean water system • Dirt and sand in the water

17. Next Steps • Use plastic bags to weld together HDPE • Quantify with Instron Shear and Peel tests • Obtain more data points for temperature series? • Portable LDPE ring mold for tap attachment…

18. Gantt Chart