Anti-corrosion preservative film for feed and preparation method and application of anti-corrosion preservative film

Abstract

The invention provides an anti-corrosion preservative film for feed and a preparation method and application of the anti-corrosion preservative film. The preparation method comprises the following steps: (1) selecting a filter paper material as a preservative film base material, and cutting the filter paper material into a shape matched with the shape of a barrel opening of a feed barrel; (2) preparing a preservative which contains 1, 2-propylene glycol, glycerol, sodium dehydroacetate, potassium sorbate, sodium benzoate, butylated hydroxyanisole, butylated hydroxytoluene, anhydrous citric acid, ethanol and Tween 80; and (3) fully soaking the preservative film base material prepared in the step (1) into the preservative, and confirming that the preservative is fully adsorbed on both sides of the preservative film base material. The pasty preservative film for the feed is good in food safety and good in fresh-keeping effect and has a continuous effect on mould, escherichia coli and the like, and the maximum anti-oxidation effect can be achieved through the compound antioxidant proportion. The preservative is convenient to store and use and good in material stability.

Description

technical field [0001] The invention relates to the technical field of fresh-keeping feed, in particular to the fresh-keeping technology of pasty feed. Background technique [0002] Feed raw materials, especially squid paste is a common single feed raw material, which is a paste obtained from fresh or frozen squid viscera in food processing enterprises through oil separation, enzymatic hydrolysis or cooking, and concentration. It is mainly used in aquatic feed such as prawns and marine fish. As a high-quality protein source and aquatic food attractant, it can increase the feed intake of compound feed. Fish paste, shrimp paste, and fish soluble paste also belong to squid paste and other aquatic single feed raw materials. They mainly use the visceral by-products of sea fish, sea shrimp or fish and shrimp as raw materials. After high-temperature cooking or enzymatic hydrolysis, they are dehydrated and concentrated to obtain paste. things. [0003] The main production processe...

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Problems solved by technology

[0006] 2. The animal protein treated by enzymatic hydrolysis process will produce a large number of small molecular polypeptides, the fluidity of the protein aqueous solution containing the polypeptide is improved, the hydrophilic groups of the protein are exposed, and the water absorption is stronger, which makes it more difficult to dry these materials High, in production, the drying problem can be improved by using a longer time or using a higher temperature, but this will further damage the active ingredients and odor of the material due to excessive high temperature

[0017] 1. Although a high salt content can prevent the reproduction of microorganisms and prevent the material from spoiling and deteriorating, excessive salt content in the feed will cause harm to the health of farmed animals, so it is necessary to limit the use of high-salt raw materials, which leads to a limited amount of paste products

[0018] 2. The heat sterilization in the production process is not sufficient. The pasty products (squid paste, fish paste, shrimp paste, etc.) used for feed in the published information do not use separate sterilization equipment to fully sterilize the materials in consideration of production costs. Bacteria, but use the temperature of other equipment for short-term heat sterilization, which will cause the material to not be fully sterilized, thus increasing the risk of spoilage of the finished product

[0019] 3. From the query of published information, it is found that squid paste, fish paste, shrimp paste and other products currently used in feed have not used aseptic packaging and vacuum packaging in consideration of production costs. Therefore, no matter whether plastic inner film bags are used or not, during the packaging process , the surface of the material will still be in contact with the ambient air, and there is still a risk of bacterial contamination. This is also the main reason why paste products often start to rot and mildew from the surface

[0020] 4. Due to insufficient sterilization in the production process, some irresponsible production enterprises will prevent material corruption by adding preservatives in excess. This method will not only endanger the health of farmed animals, but also accumulate toxins to humans through the food chain. Studies have found that excessive preservatives can only prevent the corruption of internal materials, but cannot prevent slight corruption on the surface of materials

[0021] 5. The research found that most of the paste products that have not used the sterilization process alone have a short shelf life, 80% of the materials will be spoiled in 3 to 6 months, and most of the materials cannot reach the 12-month shelf life. Intact and free from corruption requirements

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