i just want to say one word to you —just one word— ‘plastics.’ advice to dustin hoffman’s...
TRANSCRIPT
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I just want to say one word to you —just one word— ‘plastics.’
Advice to Dustin Hoffman’s character in The Graduate
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What are plastics?
• Materials composed of large molecules (called polymers) which are synthetically made or modified– Most are made from oil
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What are plastics used for?
• Work with your neighbor and try to identify as many plastic products in this room as you can in the next 60 seconds
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• Automobile– Weight (mileage)
• Aviation– 767, 787– Voyager, Space Ship
One
• Everywhere
What are plastics used for?
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Range of Products (defined by government’s NAICS* codes)
• Plastics Bags• Plastic Packaging Film
and Sheet• Non-packaging Film and
Sheet• Plastics Profile Shapes• Plastics Pipe & Pipe
Fittings• Laminated Plate, Sheet
and Shape
• Polystyrene Foam Products
• Urethane and Other Foam Products
• Plastic Bottles• Plastic Plumbing
Fixtures• Resilient Floor Covering• Plastics Products, Not
Classified Elsewhere
(Source: Probe Economics, Inc. 2004)
* North American Industry Classification System
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Plastics products improve our daily lives and have made vastimprovements in areas such as:• Medicine - helping us all live longer, healthier lives • Electronics - information, communication, and entertainment• Building and Construction - durability, aesthetics, and high
performance• Transportation - Automotive, Aerospace, and Space Exploration• Personal protection - children, athletes, police, and firefighters• Innovative packaging - freshness, storage stability, and protection
from bacteria• Recyclability and reuse (SPI* created the international recycling
symbols/numbers to facilitate recycling)
Plastics
* Society of the Plastics Industry
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• They are inexpensive to produce, and easy to mold, cast, or machine
• Their properties can be expanded even further in composites with other materials
Plastics
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Benefits of Plastics Case Study: Transportation
During the oil crisis in the 70’s, automakers found that plastics made cars more energy efficient by reducing weight
Plastics began finding their way into automobile components (bumpers, fenders, doors, etc.)
Plastics were also used for theirDurabilityCorrosion ResistanceToughnessResiliencyLightweight
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Benefits of Plastics Transportation cont…
Plastics reduced the weight of the average passenger car built in 1988 by 145 pounds
That saves millions of gallons of gas each year and will save the energy equivalent of 21 million barrels of oil over the average lifetime of those cars
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History of PolymersDate
1868190919191927192719291936193619381938193819391939
Material
Cellulose NitratePhenol-FormaldehydeCaseinCellulose AcetatePolyvinyl ChlorideUrea-FormaldehydeAcrylicPolyvinyl AcetatePolystyrene or StyreneNylon (Polyamide)Polyvinyl ButyratePolyvinylidene ChlorideMelamine-Formaldehyde
Example Use
FigurinesElectrical equipmentBeauty accessoriesCellophane package wrapping Pipe, Synthetic LeatherLighting fixtures, Plywood glueBrush backs, displaysSynthetic flooringDisposable utensils HosierySafety glass interlayerSaran wrapCountertops, Cabinets
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History of PolymersDate
194219421943194319471948195419561957195719641964
Material
PolyesterPolyethyleneFluorocarbonSiliconeEpoxyAcrylonitrile-Butadiene-StyrenePolyurethane or UrethaneAcetalPolypropylenePolycarbonateIonomerPolyimide
Example Use
Clothing, Boat hullsMilk JugsIndustrial gaskets, Non-stick linersGaskets, Tubing, UtensilsGluesLuggageFoam cushions, Shoe soles, WheelsAutomotive parts, Toilet partsLiving hinges, Safety helmetsWater bottles, Eye protectionGolf balls, Skin packagesGears
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Plastics is a complex industry
Processors – (four main processing methods)
Injection MoldingExtrusionBlow MoldingThermoforming
Equipment Suppliers Raw Material Suppliers
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Comparison with Other Industries
in the United States
Plastics industry is the nation’s 4th largest
manufacturing industry (shipments):
1. Motor Vehicles and Equipment
2. Petroleum Refining
3. Electronic Components and Accessories
4. Plastics
(Source: Probe Economics, Inc. 2004)
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Salaries in the plastics industry
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Environmental Issues
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Source Reduction
• Replacing bulky/heavy products with properly engineered, lighter, lower volume per part products
“In a comparison of the two types of grocery bags, Franklin Associates concluded that the manufacture of plastic bags produced considerably less air pollution, water borne wastes, and industrial solid-waste than the manufacture of paper. Because plastic bags are lighter, they also produce less post-consumer solid waste, taking up less space in landfills. Researchers found that plastic sacks have these advantages even when grocery store clerks pack less in each bag, thereby using 1.5 or 2 times as many plastic bags to pack the same groceries as paper.”
Brower, Michael & Leon, Warren (1999) The Consumer's Guide to Effective Environmental Choices - Practical Advice from the Union of Concerned Scientists, Three Rivers Press, New York, p. 132-133.
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Comparison of plastics and paper
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Comparison of plastics and paper
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Recycling
• Collection
• Handling/Sorting
• Reclamation/Cleaning
• End uses
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Degradation
• Plastics that can break down into smaller molecules by natural means are degradable
• Degraded byproducts are sometimes more dangerous than original product
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Waste Left to Degrade
Volume of waste found on Ohio’s roadside Weight of waste found on Ohio’s roadside
“the total annual estimated roadside litter in Ohio for all road types and interchanges is 11,772 TONS!”
http://www.dnr.state.oh.us/recycling/news/040716litterstudy.htm
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Landfill Waste
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Incineration
• British Thermal Units (BTU) is the standard for measuring heat generated from incineration
• Particulate Parts per Million (PPM) is one standard unit of measure to determine pollution when burning
MATERIAL FUEL VALUE(BTUs)
Polyethylene 19,900
Polypropylene 19,850
Newspaper 8,000
Fuel Oil 20,900Source: Data from Council on Plastics and Packaging in the Environment Waste to Energy Fact Sheet 1989
Air quality standards in the US are determined by the EPA and in accordance with international treaties. Any kind of incinerator must comply with these regulations.
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Total Product Life Cycle
• Energy Requirements to manufacture a grocery bag
Paper Bag Plastic Bag
Energy required for 0 recycle
16.2 9.8
Energy required for 100 recycle
9.8 7.0
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Future
• Rational analysis of each product type and its own particular use
• Be open to suggestions from environmental lobbyists
• Put aside emotional issues in favor of reasoned positions based on scientific principles
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Critical Thinking—Recognizing Fallacies
A fallacy is a deceptive argument; its conclusion is not well supported by its premises.
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Appeal to Popularity
Ford makes the best automobile in America; after all, more people drive Fords than any other American car.
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False Cause
I placed the quartz crystal on my forehead, and in five minutes my headache was gone. The crystal made my headache go away.
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Appeal to Emotion
In a commercial for Michelin tires, a picture of a baby is shown with the words “because so much is riding on your tires.”
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Types of fallacies
• Appeal to popularity
• False cause
• Appeal to ignorance
• Hasty generalization
• Limited choice
• Appeal to emotion
• Personal attack
• Circular reasoning
• Diversion
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Environmental Project
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Environmental Project
There is a current debate regarding the use of plastic versus paper products and their effects on the environment. For this report, you will need to research the issues on both sides of this debate and prepare a written report of 5-6 pages in which you discuss the pros and cons of both paper and plastic products.