PACKAGING
The top three functional additives in the Š sogmiller/Dollar Photo Club
plastic packaging market Smithers Pira
There is rapidly increasing demand for packaging materials that give even greater protection to their contents. Functional additives are an important technology in meeting this demand for greater product protection in the plastic packaging market. A functional additive modifies the properties of packaging to impart desirable or beneficial functions.
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any types of functional additives are used for plastic packaging, including antistatic agents, heat and UV stabilisers, impact modifiers, clarifying agents, blowing agents, brightness agents, impact modifiers, antioxidants, antimicrobial agents, oxygen scavengers, anti-block agents and various other processing aids.
Oxygen scavengers Oxygen scavengers are the largest of the functional additives used in plastic packaging, making up a 57% value share of the plastic packaging market. Oxygen scavengers help to extend product life and improve product appearance by absorbing and removing any oxygen left in the closed packaged product. In recent years, innovations have enabled oxygen scavengers to be impregnated into laminates, cards, films, bottles, plastic lids and closures. The technology has been widely used in PET beer bottles, often incorporated into closures or barrier materials. The growth in ready meals consumption has presented further opportunities for oxygen scavengers, with Japan dominating the ready meals market for oxygen scavengers. Oxygen scavengers are also growing in pharmaceutical packaging, propelled by industry demands because of regulatory pressures, cost-cutting exercises and the need to enhance patient care.
UV stabilisers Following oxygen scavengers, UV stabilisers make up the second largest value share of functional additives in the
plastic packaging market, accounting for 12%. UV or light stabilisers are added to plastic packaging to protect the package and their contents from the damaging effect of ultraviolet and infrared radiation from sunlight. Protection from UV radiation can be important in plastic packaging as UV radiation can stimulate molecules to an extent so as to break their chemical bonds that can release highly reactive radicals, capable of destroying other molecules. Demand for barrier PET bottles which offer protection against UV light is rising, as light in this range is harmful to many of the nutrients in a product such as vitamins, lipids and fatty acids. Milk bottles pose a particular challenge for PET when it comes to providing UV protection, as the vitamins in milk - especially vitamins B2 and B12 - are highly sensitive to UV light.
Antistatic additives In third place, antistatic additives account for 11.9% value market share of functional additives in the plastic packaging market. An antistatic additive is a chemical added to a plastic part for the purpose of eliminating or lessening static electricity. Antistatic additives act to permit the body or surface of the polymeric material to be slightly conductive, thus preventing the formation of static charges and deterring the fixation of dust. Polymers can accumulate static charge on their surface as they move through shear-inducing production equipment. This positive or negative static build-up can hinder
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