Clamshell Blog

Of the 20th century the development of synthetic resin material and industrialization, made of plastic packaging material is given an unprecedented development, the same time, plastic food packaging materials has become the most important packaging material.
Plastic food packaging has the following characteristics:
1. Applied very widely, from fresh food to which means that the cooked food, from cereals to meat, from a single package to transport packaging, from solid food to liquid food, covering the entire food production, processing and sales chain, has become a food part of industry itself.
2. Packaged in various forms, with tray type, container type, tube type, bag type, single-layer plastic film, multilayer film class and so on.
3. Use of plastic packaging when conditions vary, there is cold, but also microwave heating, high temperature cooking, etc..
4. Direct contact with food within the packaging as the main packaging, and packing the contents has a very diverse species composition.
5. Packaging plastic varieties, products of chemical composition is extremely complex.
The face of such deep integration with the food industry plastic packaging, its potential health and safety risks can not be ignored, is the current food safety control system we are an important part.
The following plastic packaging materials to major potential security risk to do a brief analysis:
The first type of plastic container packaging. Common plastic containers for food packaging mainly polyethylene, polypropylene, polyester, etc., packing container security risk is mainly of plastic processing additives, such as plasticizers, antioxidants, functional additives, such as anti-static agent and coloring agents. These processing aids in the migration to the food, plastic production in the residual monomer and catalyst to move food, plastics processing, thermal decomposition, the product of the aging of the migration to food. These migratory movements of food safety hazards.
The second type is single-layer plastic film-like material. Common single plastic food packaging film is polyethylene, polypropylene, cellophane, the security risk is similar to packaging containers.
The third type of plastic composite packaging materials. As the colorful composite packaging materials and various forms of functional and has become the main form of packaging food packaging. The composite materials are widely used in packaging materials, process complexity, the potential safety problems are most difficult to control the most.
Four problems:
First, the plastic material itself residual monomer, various additives and processing substances produced by the migration of low molecular weight problems.
Second, bring the solvent printing plastic residues, especially ketones, benzene solvents, inks, heavy metals and various additives.
Third, the composite adhesive, AC agent into the solvent residue, especially polyurethane adhesives Tour divorce NCO content and aromatic isocyanate polyurethane adhesives in the aromatic esters of isocyanate reacting with water, the aromatic primary amine (PAA) problem . Water or alcohol-soluble polyurethane production of dispersing agent, blocking agent, protective agent problem.
Fourth, the bag, squeezing complex processes in the slippery powder.
These packaging materials in contact with food during the great migration to food in food safety.
In addition to the packaging material itself and the processing of security risks arising from products in the transportation, storage, use also may be secondary pollution, some manufacturers food and non food packaging material produced by mixing the management of the production also brings the corresponding Loudong risk.
At present our country’s plastic packaging for food did not achieve effective control, resulting in a significant security risk.
Therefore, we must be in plastic food packaging materials monitoring system to ensure product safety. I recommend: First, to establish material security database, whereby legislation, the provisions of which can be used in food packaging materials, chemical additives which can be used for food packaging materials, which materials can be used for direct contact food packaging, migration to the maximum food is. Furthermore, we should develop the appropriate test method standards. Third, monitoring the whole process of food packaging materials, raw materials, production processes, finished products, storage and use. Should at least implement retrospective control system to achieve effective control of the safety of plastic food packaging.