Tyvek® Envelopes Frequently Asked Questions (FAQs)
1. Where to buy?
Please contact our partner Bong. www.bong.com (link contact form)
2. Can Tyvek® envelopes be used on automatic insertion and inkjet addressing/barcoding equipment? Will they need any special equipment for either of these processes?
Yes, Tyvek® envelopes will run on standard insertion and inkjet printing machines, without special equipment.
Tyvek® envelopes have been tested and will process on standard inserters made by major equipment manufacturers. Results can vary, depending upon machine setup, envelope design, and the basis weight of the Tyvek® used for the envelope. You should consult your equipment manufacturer’s envelope design specifications to assure that key design parameters (i.e. flap dimensions, flap taper, throat design, enclosure clearance) are considered in the envelope production. Envelope types are typically open-side booklet or diagonal seam, with remoistenable gum closure. You may also want to consider using a heavier basis weight Tyvek® substrate (18# vs. 14#) for your envelopes for smoother insertion.
If your customers are hand inserting Tyvek® envelopes with pressure sensitive closures, they could eliminate a very time-intensive process by switching to automatic insertion and water-activated gum closures.
Tyvek® envelopes are compatible with many inkjet systems. In fact, a variety of oil-, solvent-based, and UV cure inks have been developed specifically to print on synthetic materials, like Tyvek®, and provide acceptable inkjet addressing/barcoding on Tyvek® envelopes. Contact your equipment manufacturer or ink supplier for more information on the inks they offer for synthetic substrates you should contact your equipment manufacturer or ink supplier.
For mailers using water-based inks, line adaptations can provide satisfactory results on most systems. Some of these modifications may include: draft-mode printing, which requires less ink; extended feed intervals, which provide more time for the ink to dry; supplemental driers; and extended exit.
3. How to print on Tyvek®?
4.Can I recycle Tyvek® envelopes?
✓ Mechanical recycling
Being 100% HDPE, Tyvek® or products made from Tyvek® can be mechanically recycled into products such as underground cable protection piping, automotive parts, blown film, packaging cores and flowerpots. Products made from Tyvek® which are printed, glued, welded or sewn can also be recycled as can Tyvek® which has been extrusion coated or laminated with a polymer of the same family. Polyethylene can normally be recycled 4 to 5 times before physical properties are substantially affected. Chemical feedstock recycling Tyvek® can be chemically recycled with other polymers. In this process the original material is separated into its chemical components, which are then recovered for reuse.
✓ Energy recovery
When incinerated in excess oxygen Tyvek® yields only water and CO2 . It is excellent in fuel yielding: two or more times the energy of coal, and is equal to oil in generating heat. Incineration of HDPE does not contribute to acid rain.
Whilst DuPont does not encourage landfill, Tyvek® can, as a last resort, be safely disposed of in this way. It will not leach into groundwater because it is chemical inert and doesn’t contain binders, fillers and plasticizers.
✓ Where to recycle Tyvek® at the end of their useful life, products made from Tyvek® can be recycled via your local recycler for polyethylene waste. Additionally DuPont has set up a network of recyclers who have agreed to take back items made from Tyvek® for mechanical recycling into other products.