opp laminated printing
OPP, oriented polypropylene, is a flexible material derived from melting and orienting (stretching!) a polymer called polypropylene. This raw material, an oil by-product, is inert and unaffected by most chemical agents occurring in everyday life. It meets the requirements of the US Food and Drug Administration and other relevant authorities throughout the world. Uncoated polypropylene contains primarily carbon and hydrogen, and includes no heavy metals or other environmentally hazardous substances. By orienting polypropylene, we can improve its physical properties, such as water vapor barrier, stiffness, dimensional stability, and optics.
OPP films are very versatile, can be adapted for many diverse uses and are suitable for many types of packaging machines. Because of their physical and barrier properties especially when coated - OPP films are used in labeling and packaging for a large range of consumer products such as biscuits, snack foods, confectionery, bakery goods, soft drinks, aerosol cans and overwrap applications.
OPP films are very lightweight, bringing extra advantages in terms of packaging and ecotax economies and are environmentally stable. (Ecotax refers to savings on environmental tax levies. Currently, environmental taxes in Europe vary from country to country. In most countries, tax is charged on weight of materials being used.)
OPP films also offer superior printability, machinability, and graphic appeal and provide cost savings over other flexible packaging materials.
Moreover, OPP films can be laminated to other materials such as pp woven, non woven, PE, aluminum or other polymeric films. Laminations can be made using solvent-based or water based materials. The main printing technologies can be utilized to print OPP films, such as gravure, flexo, offset UV, letterset UV and digital processes. Cold seal adhesives can also be used directly on single layer films using a release lacquer on the opposite side of the film or in a lamination with a release OPP film.
Generally speaking, the optical effect of OPP laminated printing is better than screen printing, and it needs an extra cost of film charge.
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