Modern Advances In Tarp Design
Most of the inexpensive modern tarps we see today are made from woven polyethylene; this material is used so widely that many refer to it as polytarp. Some tarps are still made of canvas or vinyl and are used mostly for specialized applications. Formerly, canvas and canvas-type tarps were heavy and bulky. To make them waterproof, they were treated with tar or paint. They also had a tendency to pick up moisture, and as one might expect, they had low to no flexibility in freezi…
An Introduction to Shrink Wrap Machinery
The shrink wrap process involves two stages – the enveloping of the pack in shrink wrap either totally or partially and – the application of heat to the shrink wrap film which activates the material’s memory of its non-stretched molecular chains.