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The zip is bonded to the packaging by a heat activated adhesive that is pre-applied to the backing of the zip. The first resealable packaging with a zipper was licensed in the United States by Minigrip® in 1954. "Ziplock" is now used as a noun or adjective in relation to plastic bags using this type of seal regardless of manufacturer. [2]
Both print processes are suited to high speed roll-to-roll processing. [citation needed] Many converting companies will process large diameter, wide rolls of material as this increases the converting efficiency by minimising changes. On completion of the converting process the rolls may be cut into smaller rolls on a slitting machine or a ...
The typical machine is loaded with a continuous flat roll of plastic film, which has usually had labeling and artwork applied. Plastic is the most commonly used packaging material in the food industry, but the technology can be used to form continuous metallized foil/film, paper, and fabric product containers by changing the edge sealing/seaming methods.
Bemis Brothers Bag Company was founded by Judson Moss Bemis in 1858 in St. Louis, Missouri, as a manufacturer of printed cotton bags for food products. Its first location was on the second floor of a machine shop, which provided steam to operate the printing presses and readily available maintenance personnel for machine repairs.
Typical products printed using flexography include brown corrugated boxes, flexible packaging including retail and shopping bags, food and hygiene bags and sacks, milk and beverage cartons, flexible plastics, self-adhesive labels, disposable cups and containers, envelopes and wallpaper. In recent years there has also been a move towards ...
Most plastic bags have pressure sensitive adhesive applied and covered with a release liner. The liner is removed and the bag is sealed. Various forms of tamper-evident technology are used to improve security. Many bags have an irreversible imaging feature involving the selective transfer of adhesive when opened.
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