Project No Drip Prototype Presentation Jacqueline Greene Michele

Project No Drip Prototype Presentation Jacqueline Greene Michele Dufalla Tania Chan April 5, 2007

Initial Design Schematic H 2 O container cork Inside container Container wall Clamp with attached rubber plug

New Goal + http: //www 1. istockphoto. com/file_thumbview_approve/1168596/2/istockphoto_11685 96_plastic_can_container. jpg, http: //www. baproducts. com/spigot. jpg

Plastic Containers from: http: //www. singaplastics. com/images/Jerrican. Full. Shot. J. jpg

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

Method http: //www. cooking. com/images/products/shprodde/743196. jpg, http: //www. flagstaff. az. gov/images/pages/SC 581/plastic%20 bag. JPG

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

Sample Preparation 1. 2. 3. 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

Shear Test 1/8” HDPE 4 layers of clear LDPE film (0. 0006”) 1/8” HDPE 3 x 1 in contact area

Black opaque vs clear LDPE Low-Density Polyethylene (LDPE) Plain Back Film Thickness. 006" Thickness Tolerance ±. 0006" Length 25' Length Tolerance ± 12" Width 6' Width Tolerance± 4" Film Type : Tear Resistant Film Application: Window Coverings and Vapor Barriers and Construction Film Opaque Black Operating Temperature Range: -75° to +160° F Softening Point: 180° F Performance Characteristic: Weather Resistant Tensile Strength: 1700 psi, (machine direction); 1200 psi, (traverse direction) Low-Density Polyethylene (LDPE) Film Thickness. 006" Thickness Tolerance. 0012" Length 25' Length Tolerance 1/2" Width 10' Width Tolerance 1/8" Film Type Multipurpose (Visqueen) Film Application: Window Coverings and Vapor Barriers and Construction Film Translucent with White Tint Operating Temperature Range: -60° to +150° F

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

Water pressure testing: Experimental setup

Water pressure testing: Results Base Plastic Layer of LDPE Film “Glue” Results HDPE 4 Up to 50 psi for 5 mins LDPE 4 Up to 50 psi for 5 mins HDPE 2 Leakage without pressure LDPE 0 Leakage without pressure

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

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

Gantt Chart