Tyvek Report

Chemistry report on DuPont Tyvek (instructions link)

May change/be updated - still in progress - may still contain inaccuracies

Outline

DuPont
spunbounded olefin
water vapor passes through, but not air or liquid water
- allows "breathing"
- gets rid of condensation on houses
like paper, film, and fabric
- can be printed on
lightweight, strong, chemical, puncture, tear,a and abrasion resistant
used for protection of people, places and things
list other properties
- old booklet p.4 and 5
Commercial applications
- envelopes
  - fed-ex and usps
- light-use chem suits
  - resistant to what (?)
- labels in harsh places
  - a/c outside
- desiccant packages
medical packages
electrical equipment
- car covers
- HomeWrap
  - most famous use
- clean room suits
  - low linting
- outdoor banners
  - w/ uv protection
low surface friction
dimensionally stable up to 270 F or 132 C
producing it
- 100% high-density polyethylene
  - how that's made
- randomly distributed and non directional fibers
- flash spun
  - laid as a web on a moving bed
  - binded w/ heat and pressure
  - no chemicals or binders
  - change lay down speed or bonding pressures for different thickness
recycling and disposal
- recycling program
- can be disposed in landfill (no chems)
- enevlopes have 30% recycled product