Heat-sealable can lid technology

U.S. Crown Holdings Ltd. has recently developed a new packaging technology for squid fillets—the technology of heat-sealable cans. The new technology can be covered with a thin layer of aluminum foil and heat-sealed on hard steel or aluminum ears. The sealing process is covered with a small pull ring, it is easy to lift the lid of the can, and the surface of the composite material of the external layer of the pull ring aluminum foil and the inner layer of rain film can be glazing, this can open the lid quickly, Easy and safe. General fish packaging is classified into three types according to room temperature, cold storage and freezing. Normal temperature is mainly tinned canned fish and it is divided into round cans and horseshoe cans.

The round tank is the most common type with a flat round shape. It does not have a large amount of internal packaging. Its diameter is about 5.2cm and its height is 3cm. Most of them are used for packaging processed fish and soaked with some edible oils, such as sunflower oil. The type of oil is described on the label outside the tank. In addition to trademarks and manufacturers, there are other condiments that are on the label, with expiration dates printed on them. This kind of canned food has a long storage date, usually at least 3 to 4 years. The vast majority of canned packages are easy-open cans with easy-pull rings. Some manufacturers also have a graphic illustration of the opening on the label, which is simple and straightforward. Consumers do not have to bother and struggle to open cans.

Horseshoe-shaped canisters are used in far more varieties and dosages than in round cans in German supermarkets. The main concern is that most of the consumers in singles and small households are large, so the built-in quantity of horseshoe-shaped cans is also divided into various specifications. This kind of can usually contains not only fish, but also many sauces, such as tomato sauce and other jams that the Germans like to eat. The content of this sauce is also indicated on the label, for example, total 325 grams, 200 grams of fish; some 200 grams of total weight of 120 grams of fish; there are 125 grams of fish in the contents of 90 grams, etc. . In addition to common manufacturers and their addresses, the labels are also printed with ingredients, valid dates, bar codes, and recycling marks. Some manufacturers in order to allow consumers to rest assured, will also be printed by an authoritative testing center for testing and other instructions.

The refrigerated aquatic products are fish-based, but most of them are processed products that can be directly consumed. Germans like to eat salads, so there is a fish salad. The content of fish is 40%, and it is mixed with cucumber, onion, butter and other salad oils. It is packed in a small plastic box suitable for consumption by 1 person or 2 people. This type of plastic box is most common with flat cylinders and is fitted with a tightly fitted plastic cover. The label is attached to the cover, and the text description and trademark pattern required for the packaging are all printed on it. The packaging of this type of product has a particularly eye-catching indication of the refrigerated temperature and expiration date. The second type of common cold storage is sashimi, large and thin sashimi, either in a sealed plastic bag or in a rectangular flat plastic box with a cover-like sealing film. The text patterns printed on the plastic film are not complicated, and the consumer can directly see the sashimi in the package through the film. There is also a type of smoked fish with a plastic band set, because the whole smoked fish is completely contained, so exactly, the package is more like a plastic sleeve. In order to prevent the smell of smoked fish from permeating out, the packaging material used is a thick, high-density plastic film. Smoked fish is usually loaded into a molded plastic film sleeve, and the opening is heat-sealed, followed by a simple paper label.

The Germans like to eat a type of fried fish in frozen fish and shrimp. This is a semi-finished product. It uses unblemished, high-quality fish pieces and is wrapped in a layer of flour or bread crumbs. It is simply fried in oil and then cooled. Then it is frozen in a white cardboard box. Many color patterns and text descriptions are printed on the outside of the paper box. The main colors are mainly dark blue and yellow, indicating the color of the ocean and the color of the fried fish. The text description on the package is very detailed. In addition to the manufacturer and raw material composition, the most is the use of instructions. For example, some manufacturers have written a very detailed description of the freezing period. A "star" can be stored for 4 days, two "stars" can be stored for 3 weeks, and 3 "stars" can be stored for 1 year. Some of them are particularly clear about how to make such fish in the kitchen, such as frying for 5 minutes, frying for 3 minutes on each side, roasting for 8 minutes at a temperature of 200°C in the oven, and so on. It does bring a lot of convenience to consumers. The size of the carton and the amount of internal packaging of each manufacturer are different. The size of the packed fish is not the same. The common quantity is 12 or 15, and the weight is 400 to 700 grams. In the second type of frozen food, processed and washed cut large fish pieces or several smaller fishes are directly placed in a thick plastic band, and then heat-sealed and put into a freezer for sale. This method is also suitable for the packaging of almost unscented thick fillets that are removed from larger fish. Some manufacturers also pack a processed fish into plastic material. The weight of the fish is generally more than 1 kilogram. The difference from other plastic bag-packed fish is only that a whole fish is often vacuum-packed. The plastic film is tightly attached to the body of the fish and then frozen to save the freezer space.

The frozen shrimp in German supermarkets are mostly prawns. The packaging is also divided into two types. One is to directly put the washed prawns in a print-made carton and freeze them. The other is to put the prawns in plastic bags after heat sealing and freezing them. Its packaging capacity is not large, only 200 grams to 300 grams. This may be because the Germans do not like to eat shrimp or are unwilling to eat too much into the kitchen. In general, the Germans are not willing to spend too much time cooking, so no matter if the fish or shrimp are processed in advance before packing, consumers can buy it directly and open the package to cook it directly. In addition, the packaging of fish, shrimp and other aquatic products is relatively small, and is generally designed for consumption of up to two meals.

Source: China Fisheries News