Tyvek Report - Revision history

ThePlaz: add instructions and grade

2007-05-01T01:59:42Z

add instructions and grade

ThePlaz: fix sources url

2007-04-17T20:20:27Z

fix sources url

ThePlaz: remove draft

2007-04-16T03:05:44Z

remove draft

ThePlaz: add lionks to doc and pdf

2007-04-16T03:02:54Z

add lionks to doc and pdf

ThePlaz: grammer

2007-04-15T22:52:35Z

grammer

ThePlaz: fix links

2007-04-15T22:44:49Z

fix links

ThePlaz: it's

2007-04-15T22:41:26Z

it's

ThePlaz: edit

2007-04-15T22:36:51Z

edit

Show changes

ThePlaz: add some info and pictures about recycling and how its made

2007-04-15T22:02:06Z

add some info and pictures about recycling and how its made

ThePlaz: add pictures

2007-04-15T02:41:33Z

add pictures

← Older revision		Revision as of 01:59, 1 May 2007
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−	[[Chemistry]] report on DuPont Tyvek®-brand spunbonded olefin ~~(instructions link)~~	+	{{grade\|95\|100\|Model not labeled}}
		+	[[Chemistry]] report on DuPont Tyvek®-brand spunbonded olefin - [[:Image:Tyvek Report Instructions.JPG\|Instructions]]
		+
	[[Category:Chemistry]]		[[Category:Chemistry]]

@@ Line 65: / Line 65: @@
 **Product Handbook
 *http://msds.dupont.com/msds/pdfs/EN/PEN_09004a2f800074b7.pdf The MSDS from DuPont
-*http://Tyvek®.com/whatisTyvek®.htm "What is Tyvek®" DuPont website
+*http://Tyvek.com/whatisTyvek.htm "What is Tyvek®" DuPont website
-*http://www.Tyvek®.com/pdf/prod_techman.pdf Official DuPont Product Handbook
+*http://www.Tyvek.com/pdf/prod_techman.pdf Official DuPont Product Handbook
 *Red Textbook
 *http://www.earthodyssey.com/symbols.html Recycling symbol and chemical formula diagrams
 *http://en.wikipedia.org/wiki/Polymerization for chemical formula diagrams
 *http://en.wikipedia.org/wiki/Polyethylene for chemical formula diagrams
-*http://en.wikipedia.org/wiki/Tyvek® for pictures and getting me started (no facts taken)
+*http://en.wikipedia.org/wiki/Tyvek for pictures and getting me started (no facts taken)
 *US Patent 3,169,899 seemed helpful but was too dense

← Older revision		Revision as of 03:05, 16 April 2007
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	[[Chemistry]] report on DuPont Tyvek®-brand spunbonded olefin (instructions link)		[[Chemistry]] report on DuPont Tyvek®-brand spunbonded olefin (instructions link)
−	~~{{Draft}}~~
	[[Category:Chemistry]]		[[Category:Chemistry]]

@@ Line 2: / Line 2: @@
 {{Draft}}
 [[Category:Chemistry]]
 [[Image:Tyvek logo.PNG|thumb|500px|Tyvek® logo]]

@@ Line 9: / Line 9: @@
 In the absence of sunlight, Tyvek® can last for up to 20 years with a special additive.  In UV light, Tyvek® requires another additive for UV resistance.  Tyvek® style 1073D can withstand 2.6 N/cm of tension at room temperature.  This means it is hard to tear or puncture.  In addition, Tyvek® is not affected by humidity.  However Tyvek® starts to loose its shape at 132°C, melts at 135°C, and burns at the auto-ignition temperature of 400°C.  Thus it is not meant to be used to protect from excessive heat or flames.
-Tyvek® can be flexed of 20,000 times without breaking and is half as light as paper (0.38g/cc).  Mold and mildew can be grown on Tyvek® but it will not be eaten by it or introduce mold or mildew with a clean sheet.  Tyvek® has a neutral pH of 7, meaning it's neither an acid or a base.  Tyvek® generates static electricity unless specially treated.   It also features lower friction compared to paper.  Most solvents do not affect Tyvek®, but some can cause swelling.  Tyvek® to the best of anyone's knowledge is not toxic and does not require a MSDS, (material safety data sheet) however one is available covering basic safety information applicable to storing any solid.
+Tyvek® can be flexed of 20,000 times without breaking and is half as light as paper (0.38g/cc).  Mold and mildew can be grown on Tyvek® but it will not be eaten by it or introduce mold or mildew with a clean sheet.  Tyvek® has a neutral pH of 7, meaning it's neither an acid nor a base.  Tyvek® generates static electricity unless specially treated.   It also features lower friction compared to paper.  Most solvents do not affect Tyvek®, but some can cause swelling.  Tyvek® to the best of anyone's knowledge is not toxic and does not require a MSDS, (material safety data sheet) however one is available covering basic safety information applicable to storing any solid.
 [[Image:Homewrap.PNG|thumb|HomeWrap™ is the most-recognized use of Tyvek®]]
@@ Line 15: / Line 15: @@
 [[Image:John wearing Tyvek suit.jpg|thumb|Tyvek® Protection Suit]]
-Tyvek® can protect many things including people, places and things.  Tyvek® can be used as light-duty protection suits for hazardous environments or general, non-hazardous, industrial use.    Protection is provided against water-based acids, bases, salts and splashes of certain liquids such as pesticides and herbicides.  In addition protection is provided against lead dust, asbestos, and particles contaminated with radiation.  The suits are light weight and disposable.  Because water vapor can pass through them, the sweat can dissipate from a person's body.  In addition, the low-linting properties makes Tvyek® a good choice for use in "clean rooms."
+Tyvek® can protect many things including people, places and things.  Tyvek® can be used as light-duty protection suits for hazardous environments or general, non-hazardous, industrial use.    Protection is provided against water-based acids, bases, salts and splashes of certain liquids such as pesticides and herbicides.  In addition protection is provided against lead dust, asbestos, and particles contaminated with radiation.  The suits are light weight and disposable.  Because water vapor can pass through them, the sweat can dissipate from a person's body.  In addition, the low-linting properties make Tvyek® a good choice for use in "clean rooms."
 [[Image:TyvekExpressMailEnvelope.jpg|thumb|USPS Tyvek® Envelope]]

@@ Line 14: / Line 14: @@
 Tyvek® comes in different types.  Type 10, is a "hard," area-bonded product and is stiff and smooth.  Envelopes, paper and HomeWrap™ are made of Type 10.  Type 14/16 is "soft" and point-bonded with embossed patterns.  This style has fabric-like flexibility, especially for use as protective clothing.  Type 16 is perforated giving it greater softness and flexibility at the cost of barrier protection.  Type 16 is commonly used in disposable protective garments and bags.
-[[Image:John wearing Tyvek® suit.jpg|thumb|Tyvek® Protection Suit]]
+[[Image:John wearing Tyvek suit.jpg|thumb|Tyvek® Protection Suit]]
 Tyvek® can protect many things including people, places and things.  Tyvek® can be used as light-duty protection suits for hazardous environments or general, non-hazardous, industrial use.    Protection is provided against water-based acids, bases, salts and splashes of certain liquids such as pesticides and herbicides.  In addition protection is provided against lead dust, asbestos, and particles contaminated with radiation.  The suits are light weight and disposable.  Because water vapor can pass through them, the sweat can dissipate from a person's body.  In addition, the low-linting properties makes Tvyek® a good choice for use in "clean rooms."
-[[Image:Tyvek®ExpressMailEnvelope.jpg|thumb|USPS Tyvek® Envelope]]
+[[Image:TyvekExpressMailEnvelope.jpg|thumb|USPS Tyvek® Envelope]]
 Envelopes are also a common application of Tyvek®.  They offer protection from tears, punctures, and moisture and are lightweight.  FedEx® and the United Stats Post Office have been using Tyvek® envelopes for many years now.
@@ Line 34: / Line 34: @@
 Much of the utility of Tyvek® comes from the ease of use of printing on it.  Tyvek®, for the most part, prints just like paper with offset lithography, letterpress, flexography, gravure, screen process, dot matrix, thermal transfer, ion deposition, digital press applications, or ink jet printing methods.  A color match must first be made however, because colors appear slightly different on Tyvek® then on paper.  In addition, Tyvek® takes longer to dry because it does not absorb water.  Heat transfer printing is not recommended. Because Tyvek® can be printed using most of the same methods and machines as paper, it does not require much additional equipment, making many of its applications possible.
-[[Image:Tyvek® 200x magnification.PNG|thumb|200x magnification]]
+[[Image:Tyvek 200x magnification.PNG|thumb|200x magnification]]
 Tyvek® is made from continuous, very-fine high-density polyethylene (HDPE) which are randomly distributed and non-directional.  The fibers are first flash spun, a process patented by DuPont (#6117801) and laid as a web on a moving conveyor belt.  The fibers are then bonded using heat and pressure.  No binders, sizers, or fillers are used.  Different types are produces by changing the conveyor speed and bonding conditions.

@@ Line 3: / Line 3: @@
 [[Category:Chemistry]]
-[[Image:Tyvek logo.PNG|thumb|Tyvek® logo]]
+[[Image:Tyvek logo.PNG|thumb|300px|Tyvek® logo]]
 Tyvek® is a brand of spunbonded olefin from DuPont.  It is special because it allows water vapor to pass through it while blocking liquid water and air from passing through it.  Thus it allows whatever it is protecting to "breath" but still blocks it from liquid water and air.  One of its most famous applications is Tyvek® HomeWrap™ where it stops wind-driven rain and bulk water from entering houses along with stopping air flow through wall cavities while still allowing moisture to escape from interior walls.    DuPont claims that it combines the best of paper, film, and cloth.  It is strong, lightweight, flexible smooth, low-linting, and opaque.  In addition is is resistant to certain chemicals, punctures, tears and abrasions.
@@ Line 36: / Line 36: @@
 cutting
 [[Image:Tyvek 200x magnification.PNG|thumb|200x magnification]]
 Tyvek is made from continuous, very-fine high-density polyethylene (HDPE) which are randomly distributed and non-directional.  The fibers are first flash spun, a process patented by DuPont (6117801) and laid as a web on a moving conveyor belt.  The fibers are then bonded using heat and pressure.  No binders, sizers, or fillers are used.  Different types are produces by changing the conveyor speed and bonding conditions.
-High density polyethylene is a common plastic because it is stiff and a good barrier.  HDPE made up 47 % of plastic bottle sales in 1999 (Earth Odyseey).  HDPE is made of a continuous chain of ethylene monomers.
+High density polyethylene is a common plastic because it is stiff and a good barrier.  HDPE made up 47% of plastic bottle sales in 1999 (Earth Odyseey).  HDPE is made of a continuous chain of ethylene monomers.  Here is the chemical formula and space filling model of ethylene (ethene):
-[[Image:HDPEexpanded.gif]]
+<center>[[Image:82px-Ethylene.svg.png]]&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[[Image:Ethylene-3D-vdW.png|100px]]</center>
-[[Image:Polymerization.png|thumb|Polymerization of styrene]]
+The ethene monomers undergo addition polymerization (Red Textbook 747).  The ethylene molecules bond to one another for form the long repeating chain of the polymer polyethylene.  Here is the repeating unit of polyethylene showing it's stereochemistry.
-The C=C double bond normally part of an alkene is transfered into a C-C single bond in polymerization.  The molecular formula of HDPE is (-CH2-CH2-)n Polyethylene is created through polymerization of ethene.
+<center>[[Image:Polyethylene-repeat-2D.png|150px]]</center>
-[[Image:Polyethylene-3D-vdW.png|thumb|right|200px|Space-filling model of a '''polyethylene''' chain]]
+The C=C double bond normally part of an alkene is transfered into a C-C single bond in polymerization.  Here is a space filling model of a polyethylene chain:
-[[Image:Polyethylene-repeat-2D.png|thumb|right|200px|The repeating unit of '''polyethylene''', showing its stereochemistry.]]
-[[Image:Polyethylene-repeat-2D-flat.png|thumb|right|200px|A simpler way of representing the repeating unit.  Note, however, that the C−H bond angles are not 90° as this diagram would indicate, but are approximately 110°, because of orbital hybridisation [Orbits are modified when they are near each other] .]]
-get pictures: http://en.wikipedia.org/wiki/Polyethylene
+<center>[[Image:Polyethylene-3D-vdW.png|200px]]</center>
-write about http://en.wikipedia.org/wiki/Polymerization
+HDPE is defined by a density of greater or equal to 0.941 g/cc.  It is used to make many different products including milk jugs, containers, bags, and toys.  HDPE happens to have a low degree of branching and thus stronger intermolecular forces and tensile strength. HDPE can be produced by chromium/silica catalysts, Ziegler-Natta catalysts or metallocene catalysts.
 [[Image:Recycle-resin-logos-lr 02.png|thumb|Recycling code 2]]
-recycling it
+Because Tyvek is made without chemical binders and is chemically inert, it will not leach into the groundwater in a landfill.  However, it can also be recycled.  DuPont assets in recycling Tyvek, and some styles are even made with up to 25% recycled material .  Because Tyvek is made of HDPE it carries the "2" recycling symbol and can be recycled at over 70 facilities in North America.  Many municipalities collect HDPE for recycling.  Recycled HDPE is used to make more Tyvek, plastic lumber for decks, picnic tables, and lawn furniture.  It can also be safely incinerated.  Under optimal conditions it yields water and carbon dioxide and leaves almost no residue.
 ==Sources==
@@ Line 65: / Line 65: @@
 *http://tyvek.com/whatistyvek.htm "What is Tyvek" DuPont website
 *http://www.tyvek.com/pdf/prod_techman.pdf Official DuPont "Product Technical Manual"
 *http://www.earthodyssey.com/symbols.html Recycling symbol and chemical formula diagrams
 *http://en.wikipedia.org/wiki/Polymerization for chemical formula diagrams

@@ Line 3: / Line 3: @@
 [[Category:Chemistry]]
 Tyvek® is a brand of spunbonded olefin from DuPont.  It is special because it allows water vapor to pass through it while blocking liquid water and air from passing through it.  Thus it allows whatever it is protecting to "breath" but still blocks it from liquid water and air.  One of its most famous applications is Tyvek® HomeWrap™ where it stops wind-driven rain and bulk water from entering houses along with stopping air flow through wall cavities while still allowing moisture to escape from interior walls.    DuPont claims that it combines the best of paper, film, and cloth.  It is strong, lightweight, flexible smooth, low-linting, and opaque.  In addition is is resistant to certain chemicals, punctures, tears and abrasions.
 In the absence of sunlight, Tyvek can last for up to 20 years with an additive.  In UV light, Tyvek requires another additive for UV resistance.  Tyvek style 1073D can withstand 2.6 N/cm tension at room temperature.  In addition, Tyvek is not affected by humidity.  However Tyvek starts to loose its shape at 132°C, melts at 135°C, and burns at the auto-ignition temperature of 400°C.  Thus it is not meant to be used to protect from excessive heat or flames.
 Tyvek can be flexed of 20,000 times without breaking and is half as light as paper (0.38g/cc).  Mold and mildew can be grown on Tyvek but it will not be eaten by it or introduce mold or mildew on a clean sheet.  Tyvek has a neutral pH of 7 meaning its neither an acid or a base.  Tyvek generates static unless specially treated.   It also features lower friction compared to paper.  Most solvents do not affect Tyvek, but some can cause swelling.  Tyvek to the best of anyone's knowledge is not toxic and does not require a MSDS (material safety data sheet) however one is available.
 Tyvek comes in different types.  Type 10, is a "hard" area-bonded product and is stiff and smooth.  Envelopes, paper and HomeWrap™ are made of Type 10.  Type 14/16 is "soft" and point-bonded with embossed patterns.  This style has fabric-like flexibility especially for protective clothing.  Type 16 is perforated giving it greater softness and flexibility at the cost of barrier protection.  Type 16 is commonly used in disposable protective garments and bags.
@@ Line 17: / Line 20: @@
 Envelopes are also a common application of Tyvek®.  They offer protection from tears, punctures, and moisture and are lightweight.  FedEx® and the United Stats Post Office have been using Tyvek® envelopes for many years now.
 Medical packaging uses Tyvek® because it's sterile, bacterial resistant, doesn't puncture easily, and peels off cleanly.
 Tyvek® also is used to protect cars, boats, and campers.  It doesn't scratch and protects against acid rain and salt sprays by blocking, not absorbing water like cotton does.  Thus it is also lighter, even when wet.  Also because it is breathable, it prevents rot and mildew caused by trapped water because the water can condense and dissipate.  Dirt and dust as well as particles larger then two microns can't get in to scratch car's finishes.  Lastly, it blocks 98% of the sun's UV (ultraviolet rays) protecting the car when Tyvek has been treated with special UV inhibitors.
@@ Line 31: / Line 36: @@
 cutting
+[[Image:Tyvek 200x magnification.PNG|thumb|200x magnification]]
 Tyvek is made from continuous, very-fine high-density polyethylene (HDPE) which are randomly distributed and non-directional.  The fibers are first flash spun, a process patented by DuPont (6117801) and laid as a web on a moving conveyor belt.  The fibers are then bonded using heat and pressure.  No binders, sizers, or fillers are used.  Different types are produces by changing the conveyor speed and bonding conditions.