Food Contact Materials Those Things (antioxidants Articles)
On June 25, 2014, the WESTON705 liquid antioxidant from Addivant, Inc. of Connecticut was approved by the US Food and Drug Administration for food contact materials. It is available in a range of snack bags, bags of heated food and cooked food, Multilayer films and coatings, composite films, mark a new type of antioxidant for the first time to be recognized by the American public begin to use in food contact materials. At the same time, once again opened the food contact materials in the antioxidant veil. So what is the antioxidant in the food contact materials? What are the classification of antioxidants? What are the specific hazards of antioxidants? The following will answer one by one for you.
What is the antioxidant?
In the process of food contact materials processing or production process, in order to reduce or inhibit the aging of polymer materials degradation, improve the material heat, light resistance, extend its service life, often add all kinds of antioxidants.
Antioxidants are food additives in the processing of food additives, in the application of plastic products is extremely extensive. China is a large producer of plastic products and consumption, the use of antioxidants is huge, especially with a variety of new functional plastic material development and application, resulting in more and more different performance of antioxidants appear and be added to the plastic products The
1. Hindered phenolic antioxidants
Hindered phenol antioxidant is the main antioxidant of plastic materials, according to the molecular structure is divided into single phenol, bisphenol, polyphenols, nitrogen heterocyclic polyphenols and other varieties.
2. Phosphite Antioxidant
Phosphite Antioxidants and sulfur-containing antioxidants are used as auxiliary antioxidants, decomposable peroxides, chelating metals and Lewis acids, and have good synergistic effects with other antioxidants, while imparting thermal stability to plastics And light stability.
3. sulfur-containing antioxidant
Domestic production of sulfur-containing antioxidants according to the molecular structure can be divided into thioester antioxidant, thio bisphenol antioxidant and thioether phenolic antioxidant three varieties. Domestic thioester antioxidant has four products: DLTDP, DSTDP, DMTDP, DTDTP.
4. Compound antioxidant
Different types of primary and secondary antioxidants or the same type of different molecular structure of the antioxidant, functional and application effects are different, have their own strengths. The compound antioxidant is composed of two or more kinds of antioxidants of different types or different varieties. It can be used in plastic materials to achieve the best anti-thermal aging effect with minimum dosage and lowest cost. The