The viscosity Du is the main factor to judge the quality of transparent tape. The adhesive tape with high viscosity is good. Of course, this can't be used as the only evaluation standard, because some poor quality tapes have a longer viscosity after leaving the factory and will not stick after a period of time.

Good quality tape won't do that. The main methods to judge the quality of the tape are as follows:

Stretch wrap or stretch film is a highly stretchable plastic film that is wrapped around items. The elastic recovery keeps the items tightly bound. In contrast, shrink wrap is applied loosely around an item and shrinks tightly with heat. It is frequently used to unitize pallet loads but also may be used for bundling smaller items.

Types of stretch film include bundling stretch film, hand stretch film,

1.Cut off the bottom edge of a shrink wrap bag with a heat sealer. When you look at shrink wrap bags, you’ll notice that the bottom edge is already sealed. Right next to the seam is a strip of excess plastic. Use your heat sealer to cut this bottom edge off. To use a heat sealer:[1]

Plug in and turn on your heat sealer.Open the heat sealer and place the bag between the blades.

The primary difference between these two types of Stretch Wrap Film is the process in which they are created and manufactured. These differences also make a big impact on the usability and price of the film.

The cast process beings the same as blown, with beads of resin being fed into a heated barrel and being forced through a narrow slotted die.