Polystyrene and polystyrene copolymers have many unique properties that make them desirable for use in flexible packaging. Polystyrene monofilms however are not practical for use on high-speed packaging lines due to their poor heat sealability and flex cracking. Coextruded films of polystyrene with polyethylene combine the desirable properties of polystyrene with polyethylene. Still, PS coextru...

A weak protein solution extracted from chicken breast meat was exposed to three types of packaging materials. The crude myofibrillar protein solution (12.0 mg protein/mL buffer) was suspended in a 0.6M NaCl/NaPO4 buffer, then placed in bags made from either polyethylene (nonbinding film), a nylon blend (binding film), or Surlyn (binding film). Two separate experiments were conducted to determin...

Biocomposites have attracted a great deal of interest in research and industry sectors because they are typically lightweight, sustainable, environmentally friendly, and their thermomechanical properties can be designed to fit specific applications by tuning of their composition. In this study, mechanical properties of natural-fiber reinforced thermoplastic composite films were explored. Thermo...

Strawberries have a very short post-harvest life mostly due to their relatively high water content, intense metabolic activity and susceptibility to microbial rot. Antimicrobial low-density polyethylene nanocomposite films containing ZnO nanoparticles at different mass fractions were prepared by melt mixing and followed by compression moulding using a hot press machine. Fresh strawberries were ...

A 2-year field study on the effect of different light environments, obtained by using cladding materials (polyethylene films and shade net) able to cut off specific regions of the photosynthetically active radiation and ultraviolet wavebands, on the growth and phenylpropanoids content of Achillea collina grown in the Alps was conducted. Overall the plant growth was strongly enhanced in the seco...

The activation energy of thin films polymers made pure polyethylene oxide (PEO) andPEOdoped with 0.1 % by weight iodine were investigated. observed physical constants the cast films, such as determined. prepared casting method using electricity. This study investigated variation wt. a frequency in range 200-800 kHz and temperature 30-55°C. results proved that there is significant change values ...

We report the first results of functional properties of nitrogenized silver-permalloy thin films deposited on polyethylene terephthalic ester {PETE (C10H₈O₄)n} flexible substrates by magnetron sputtering. These new soft magnetic thin films have magnetization that is comparable to pure Ni81Fe19 permalloy films. Two target compositions (Ni76Fe19Ag₅ and Ni72Fe18Ag10) were used to study the effect ...

In this research work, the production of undoped and silver (Ag) doped zinc oxide (ZnO) thin films for food packaging applications was developed. The main goal was to determine the influence of coatings morphology and thickness on the antimicrobial performance of the produced samples. The ZnO based thin films were deposited on PET (Polyethylene terephthalate) by means of DC reactive magnetron s...

Plastic tarps are often used in soil fumigation to contain chemicals in the soil to increase efficacy and decrease emissions of fumigant vapors. This research has shown that plastic films have a significant capacity to sorb fumigant vapors and that the sorption is largely reversible. We tested three agricultural films (polyethylene and two highbarrier films) with four soil fumigants (methyl bro...

Layer-by-layer (LbL) assembly has attracted much attention because of its ability to create multifunctional films on surfaces while maintaining bulk properties. The method relies on sequential adsorption of polymers onto bulk surfaces from solution, giving rise to complex multilayered films. LbL assembly is simple to implement and offers extensive control over film properties and composition du...