RU2599818C2 - Method for preservation with damping shell - Google Patents

Abstract

FIELD: food industry.

SUBSTANCE: invention relates to food industry and can be used for preservation of various products. During preservation method, first products for preserving are washed, cleaned and ground, and then placed in a heat resistant container made of a polymeric material that can withstand temperatures up 200 °C, and heat-treated at a temperature 120-200 °C until products are cooked. Heat-resistant container before heat treatment is not sealed, and an opening is left for steam, which is hermetically sealed when product is fully cooked. Then around heat-resistant container is created a damping shell by a sealed package of heat-resistant container with finished product in modified gas medium, for example, nitrogen, using packets of polymer, high-barrier films, intended for packing in gas medium.

EFFECT: use of invention prolongs shelf life of canned food.

2 cl

Description

The invention relates to the food industry and can be used for preserving various products.

A known method of preserving potatoes (No. 2113126, IPC A23B 7/00, A23B 7/10, A23L 1/216, A23L 3/34, A23B 7/154, A23L 3/3463, claimed 11.08.1997, published on 20.06.1998 g), including the heat treatment of potatoes, sealed in containers, at a temperature of 75-80 ° C with the addition of a preservative nisin and lactic acid. Undoubtedly, the low temperature of the heat treatment allows the use of cheaper and more technologically advanced polymer containers for canning, but there are bacteria, for example, botulism that cause the disease, which may not die at a temperature of 75-80 ° C and cause serious consequences for those who used these canned food, and the method also uses preservatives are also not beneficial for the human body.

Also known is a canned product and a method for its production (No. 2341110, IPC A23L 1/314, A23B 4/005, announced March 20, 2007, published December 20, 2008). In this way, the products are crushed and pre-cooked or cooked by blanching, frying, boiling, then the prepared products are placed in trays made of polymer, combined PP / EVOH / PP material, sealed with PET / EVOH / CPP film and sterilized at a temperature of 115-120 ° C and a back pressure of 0.22-0.30 MPa. This method is the closest to the claimed by essential features (prototype).

The disadvantage of the prototype is the excessive complexity of the production process requiring special equipment for sterilization with the creation of back pressure and the need for preliminary heat treatment of the product before sterilization.

The aim of this invention is to eliminate the disadvantages of the prototype.

To solve this problem, a canning method with a damper shell is proposed, which consists in the fact that first the products intended for canning are washed, if necessary, cleaned and ground, then they are placed in a heat-resistant container made of a polymer material that can withstand temperatures up to 200 ° C, for example a bag or sleeve designed for baking food products from polyethylene terephthalate (PETF), and conduct heat treatment at a temperature of 120-200 ° C, for example in a conventional oven, until the products are completely ready, distinguishing I mean that the heat capacity is not sealed before heat treatment, but a steam outlet is left, which is sealed tightly when the product is completely ready, for example by simply tying the heat capacity with strips of the same polyethylene terephthalate, then a damping shell is created around the heat capacity by hermetically packing the heat storage container with the finished product product into a modified gas environment, such as nitrogen, using bags of polymer, high-barrier films intended for packaging in a gas environment e.

The development of the method consists in the fact that in order to ensure a long shelf life, the heat capacity is made bilayer or multilayer.

The idea of the invention is the use of high-tech polymer materials for canning, which allows to optimize the conservation process. This method allows for the preservation of products without the addition of preservatives due to the fact that the product undergoes high-temperature processing and sterilization in the heat capacity space, which has a steam outlet that is sealed when the product is completely ready. To ensure a longer shelf life, the heat capacity is double-layer or multi-layer. The further creation of a damper shell around the heat capacity with the finished product, consisting of a modified gas medium and an airtight package of high-barrier polymer materials intended for packaging in a gas medium, prevents the access of oxygen to the product and, accordingly, ensures a long shelf life of canned products.

The method uses materials and equipment known in the art, which indicates its industrial applicability, and the use of cheaper, compared to tin or glass, polymer containers for packaging will allow to obtain a significant economic effect from the implementation of this invention.

Information sources

1. No. 2113126, IPC A23B 7/00, A23B 7/10, A23L 1/216, A23L 3/34, A23B 7/154, A23L 3/3463, claimed 11.08.1997, published on 06.20.1998.

2. No. 2341110, IPC A23L 1/314, A23B 4/005, notified March 20, 2007, published December 20, 2008

Claims (2)

1. A canning method with a damper shell, including washing products intended for canning, cleaning, crushing, packing them in a heat-resistant container made of a polymer material that can withstand temperatures up to 200 ° C, for example, a bag or sleeve designed for baking food products from polyethylene terephthalate ( PETF), and conducting heat treatment at a temperature of 120-200 ° C, for example in an ordinary oven, until the products are completely ready, characterized in that the heat capacity is not sealed before heat treatment, but left a steam outlet is opened, which is sealed hermetically at the moment the product is completely ready, for example by simply tying the heat capacity with strips of the same polyethylene terephthalate, then a damper shell is created around the heat capacity by hermetically packing the heat capacity with the finished product in a modified gas medium, for example nitrogen, using bags from polymer, high-barrier films intended for packaging in a gas environment. 2. The method according to p. 1, characterized in that in order to ensure a long shelf life, the heat capacity is double-layer or multi-layer