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速冻食品具有营养、方便、卫生、经济等特点,因此在欧美、日本等发达国家发展很快,市场需求量巨大。长期以来,罐头一向是作为一种既安全又方便的食品在世界被应用。但罐头食品主要的缺点是失去了食品原有风味和损失了一部分营养物质。50年代以来,美国人首先研制冷冻食品,1945年以冻制浓缩橙汁成功为代表的速冻食品开始起步,其后,随着速冻技术和设备不断更新改进,预制速冻制品的出现以及耐热复合塑料薄膜包装袋和高效率、高质量的解冻复原加热设备的研制成功,使速冻食品业在国外已成为方便食品和快餐业的支柱行业。60年代,冷冻链已在社会上形成,各种速冻食品逐步进入超级市场,速冻食品的摊位日益扩大,品种迅猛发展,从过去主要是一些肉、禽、水产品发展到速冻蔬菜、果汁及各种调
Frozen food has the characteristics of nutrition, convenience, hygiene, economy, etc. Therefore, it has developed rapidly in developed countries such as Europe, America and Japan, and the market demand is huge. Canned food has long been used as a safe and convenient food in the world. However, the main disadvantage of canned food is the loss of the original flavor of the food and the loss of some nutrients. Since the 1950s, Americans first developed frozen foods. In 1945, frozen foods represented by frozen orange juice concentrate began to take off. Subsequently, with the rapid renewal of technology and equipment, the appearance of prefabricated frozen products and heat-resistant composite plastics. The successful development of film packaging bags and high-efficiency, high-quality thawing and reconstitution heating equipment has made the quick-frozen food industry a pillar industry for convenience food and fast food industries in foreign countries. In the 1960s, the frozen chain was formed in the society. Various quick-frozen foods gradually entered supermarkets. The stalls for quick-frozen foods were expanding and the varieties rapidly developed. From the past, it was mainly the development of meat, poultry and aquatic products to quick-frozen vegetables, juices and Tune