New UV Absorber for PET Packaging: Better Protection With Less Discoloration

Abstract

``UVA S-Pack'' is a new UV absorber additive designed to protect PET packaging content from the damaging effects of UV radiation. Compared to conventional UV absorbers that have been used for this purpose, this new product offers broader UV protection with less discoloration. The performance of this new UV absorber in content protection was demonstrated in exposure tests with vitamins and colorants. The product is also FDA-cleared for use in PET for food-contact applications. Due to this product's unique absorption and emission profile, it is expected to also offer suitable performance in polyester-based films and sheets.

Active and Intelligent Packaging of Cheese: Developments and Future Scope

“…Kristoffersen, Stussi, & Gould (1964) [53] reported reduced flavor deterioration in consumer packs of cheddar cheese using Uvinul D 49® as a UV light screening material. Uvinul® S-Pack is a novel FDA approved UV absorber for PET packaging films, which prevented the UV degradation of vitamins and β-carotene, thus highlighting its potential of preventing light degradation changes in cheeses kept in refrigerated illuminated cabinet of supermarkets [54]. Recently, flavonoids had been reported to facilitate the dissipation of photon energy to heat thus deterring photodegradation [22].…”

Furfural-Based Modification of PET for UV-Blocking Copolymers with Decreased Oxygen Permeability

“…PET blocks UV wavelengths up to around 315 nm, while more than 50% transmission can be observed at 330 nm, which is already enough exposure to initiate photooxidative degradation of certain ingredients and affect their shelf life. 8 Blocking the greatest possible range of damaging UV radiation while at the same time keeping the transmission in the visible region as high as possible is therefore an intriguing property. Generally, UV transmission can be kept below an acceptable level for many applications by using compounds added to the polymer, e.g., UV-absorbing additives or coatings.…”

“…Another possible limitation with PET is its UV-light transparency, which can limit its use in the packaging of UV-sensitive products. PET blocks UV wavelengths up to around 315 nm, while more than 50% transmission can be observed at 330 nm, which is already enough exposure to initiate photo-oxidative degradation of certain ingredients and affect their shelf life . Blocking the greatest possible range of damaging UV radiation while at the same time keeping the transmission in the visible region as high as possible is therefore an intriguing property.…”

Preparation of the Layer-by-Layer Deposited Silver Nanoparticles Multilayer Films on Poly(ethylene Terephalate) Substrate

“…Compared with conventional materials, PET film has distinct advantages, including light weight, durability, and transparent package [3] . Unfortunately, PET can only absorb the short wavelength component of UV radiation and therefore offers protection up to about 320nm (UVB region), and it's almost transparent for longer UV wavelengths region between 320 and 400nm (UVA region) [4] .…”