Tuff-Tear Envelopes:
Tuff-Tear Envelopes (An economical alternative to Tyvek)
Tuff-Tear Envelopes are available in the following Catalog Sizes and includes Quick Stick:
Catalog Envelopes 9"x12" 26 lb bright white tuff-tear paper stock (Open end)
Catalog Envelopes 10"x13" 26 lb white white tuff-tear paper stock (Open end)
Available with 1/color or 2/color printing on two Envelope sizes.
Tyvek the name is a registered trademark of DuPont. The material is very strong; it is difficult to tear but can easily be cut with scissors or a knife. Water vapor can pass through Tyvek (highly breathable), but not liquid water, so the material lends itself to a variety of applications.
Tyvek is a nonwoven product consisting of spunbond olefin fiber. It was first discovered in 1955 by DuPont researcher Jim White who saw polyethylene fluff coming out of a pipe in a DuPont experimental lab. It was trademarked in 1965 and was first introduced for commercial purposes in April 1967.
According to DuPont's website, the fibers are 0.5–10 µm (compared to 75 µm for a human hair). The nondirectional fibers (plexifilaments) are first spun and then bonded together by heat and pressure, without binders.
