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

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

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Plastic Containers from:

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

Method

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

Sample Preparation 1. Hot Plate- insufficient heat to weld plastics together without melting & warping exterior layers, variable temperature 2. Oven- insufficient heat to weld plastics together, variable temperature 3. 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”) 3x1 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 Tolerance1/2" Width10' Width Tolerance1/8" 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 HDPE4 Up to 50psi for 5 mins LDPE4 HDPE2 Leakage without pressure LDPE0

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

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

Gantt Chart