Food preservation film and preparation method thereof

Abstract

The invention provides a food preservation film. The food preservation film comprises the following raw materials: a high polymer resin base film and an active ingredient; the mass concentration of the active ingredient ranges from 0.1% to 0.5%; the high polymer resin base film comprises one of LDPE (Low-Density Polyethylene), PP (Poly Propylene) and EVOH (Ethylene Vinyl Alcohol copolymer); and the active ingredient comprises a mixture of Butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT) in a mass ratio of 1: 1. The food preservation film is capable of effectively retarding the oxidization of chilled fresh pork, inhibiting the juice loss of the chilled fresh pork and also sterilizing in a temperature range of 0 to 4 DEG C, and therefore, the storage period of the chilled fresh pork product can be effectively prolonged, the cost can be reduced, and the problems of the flavor change of the pork products, the loss of nutrient substances and low safety caused by the traditional food preservation films also are solved.

Description

technical field

[0001] The invention relates to the technical field of plastic packaging, in particular to a food preservation film and a preparation method thereof. Background technique

[0002] With the development of society, more and more food needs to be kept fresh by using fresh-keeping technology, while traditional plastic wrap usually uses polypropylene (Polypropylene, hereinafter referred to as: PP) or ethylene-vinyl alcohol copolymer (Ethylene vinyl alcohol, hereinafter Abbreviation: EVOH), or low density polyethylene (Low Density Polyethylene, hereinafter referred to as: LDPE) as the raw material is extruded by a twin-screw extruder, and then blown by a single-screw blown film machine. During the preparation process, it will inevitably come into contact with metal-containing equipment such as twin-screw extruders and single-screw blown film machines. When metals are in contact with raw materials for preparing plastic wrap, metal ions will act as catalysts for oxid...

Examples

Embodiment 1

[0028] The active ingredients are selected to be used in combination with BHA, BHT and TA, the mass ratio of the three is 1:1:1, and the mass concentration of the three is 0.5%, and the rest is LDPE. The total amount of active ingredients and LDPE is determined to be 500g, then the mass of BHA, BHT and TA is 2.5g, and the mass of LDPE is 492.5g. Dry 492.5g LDPE at 80°C in advance, stir the dried LDPE and the active ingredient homogeneously, prepare and modify them through a twin-screw granulator, and pass the obtained modified resin particles through a single-screw film blowing mechanism Get food plastic wrap A.

Embodiment 2

[0030] Select the active ingredients BHA and BHT to be used together, and the mass concentration is 0.5%, the mass ratio of the two is: 1:1, and the rest is LDPE. The total amount of active ingredients and LDPE is determined to be 500g, then the mass of BHA and BHT are both 2.5g, and the mass of LDPE is 495g. Pre-dry 495g of LDPE raw material at 80°C, stir the dried LDPE and active ingredients homogeneously, prepare and modify them through a twin-screw granulator, and pass the obtained modified resin particles through a single-screw blown film machine to produce food Plastic wrap B.

Embodiment 3

[0032]The active substances are selected to be used in combination with BHA, BHT and TA, and the mass concentration is 0.5%, and the rest is PP. The total amount of active substance and PP is determined to be 500g, the mass of BHA, BHT and TA is 2.5g, and the mass of PP is 492.5g. Dry 492.5g of PP raw material at 80°C in advance; stir the dried PP raw material and active material homogeneously, prepare and modify them through a twin-screw granulator, and pass the obtained modified resin particles through a single-screw blown film mechanism Get food plastic wrap C.

technical field

[0001] The invention relates to the technical field of plastic packaging, in particular to a food preservation film and a preparation method thereof. Background technique

[0002] With the development of society, more and more food needs to be kept fresh by using fresh-keeping technology, while traditional plastic wrap usually uses polypropylene (Polypropylene, hereinafter referred to as: PP) or ethylene-vinyl alcohol copolymer (Ethylene vinyl alcohol, hereinafter Abbreviation: EVOH), or low density polyethylene (Low Density Polyethylene, hereinafter referred to as: LDPE) as the raw material is extruded by a twin-screw extruder, and then blown by a single-screw blown film machine. During the preparation process, it will inevitably come into contact with metal-containing equipment such as twin-screw extruders and single-screw blown film machines. When metals are in contact with raw materials for preparing plastic wrap, metal ions will act as catalysts for oxid...

Examples

Embodiment 1

[0028] The active ingredients are selected to be used in combination with BHA, BHT and TA, the mass ratio of the three is 1:1:1, and the mass concentration of the three is 0.5%, and the rest is LDPE. The total amount of active ingredients and LDPE is determined to be 500g, then the mass of BHA, BHT and TA is 2.5g, and the mass of LDPE is 492.5g. Dry 492.5g LDPE at 80°C in advance, stir the dried LDPE and the active ingredient homogeneously, prepare and modify them through a twin-screw granulator, and pass the obtained modified resin particles through a single-screw film blowing mechanism Get food plastic wrap A.

Embodiment 2

[0030] Select the active ingredients BHA and BHT to be used together, and the mass concentration is 0.5%, the mass ratio of the two is: 1:1, and the rest is LDPE. The total amount of active ingredients and LDPE is determined to be 500g, then the mass of BHA and BHT are both 2.5g, and the mass of LDPE is 495g. Pre-dry 495g of LDPE raw material at 80°C, stir the dried LDPE and active ingredients homogeneously, prepare and modify them through a twin-screw granulator, and pass the obtained modified resin particles through a single-screw blown film machine to produce food Plastic wrap B.

Embodiment 3

[0032]The active substances are selected to be used in combination with BHA, BHT and TA, and the mass concentration is 0.5%, and the rest is PP. The total amount of active substance and PP is determined to be 500g, the mass of BHA, BHT and TA is 2.5g, and the mass of PP is 492.5g. Dry 492.5g of PP raw material at 80°C in advance; stir the dried PP raw material and active material homogeneously, prepare and modify them through a twin-screw granulator, and pass the obtained modified resin particles through a single-screw blown film mechanism Get food plastic wrap C.

Images