china drawstring bags manufacturers cjeap personalized drawstring bags wholesale custom made in china suppliers manufacturers….. materials, performance varies, therefore, only in the understanding of the performance of a variety of packaging materials and packaging containers, according to package frozen foods can be asked to choose protection can protect frozen food flavor and quality, but also reflects the value of their goods and make a comprehensive package at a reasonable cost of packaging materials. 3, market positioning and distribution of goods regional conditions. Market positioning of goods, transport and climatic and geographic conditions, such as the circulation area of frozen food packaging is a factor that must be considered when designing. Domestic sales of goods and export of goods in different countries for its packaging and packaging requirements vary, different modes of transport protective packaging requirements are not the same. Frozen food packaging, the changing climatic conditions essential commodity circulation area, because the temperature inside the chemical changes in the frozen food ingredients, packaging materials and microbial barrier itself has a significant impact. 4,