Antibacterial packaging material and preparation method thereof

Abstract

The invention provides an antibacterial packaging material and a preparation method thereof. Mainly comprises polyoxyethylene lauryl ether, an ethylene-propylene copolymer, acetyl tributyl citrate, dimethylol dihydroxy ethylene urea, trehalose, ethylene bis stearamide, sodium hypophosphite, lysine-based isocyanate, cellulose acetate butyrate, an antioxidant, a coupling agent, nano-silver particles and the like which are proportioned according to a certain weight ratio. According to the antibacterial packaging material and the preparation method thereof, the process is simple, the antibacterial packaging material is suitable for large-scale industrial production, the antibacterial packaging material has an antibacterial effect, growth of bacteria on the surface of food can be effectively inhibited, the shelf life of the food is prolonged, a slow release technology is adopted, an antibacterial agent can be slowly released, the antibacterial aging is effectively prolonged, the use amount of the antibacterial agent is reduced, and the production cost is reduced. The safety and the stability of the antibacterial packaging material are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging materials, and in particular to an antibacterial packaging material and a preparation method thereof. Background Art

[0002] As people's living standards improve, they are increasingly concerned about food safety. Antimicrobial packaging materials play an important role in extending the shelf life of food and maintaining the freshness of food. Most existing antimicrobial packaging materials have problems such as short-lasting antimicrobial effects or easy migration of antimicrobial agents, which limits their application. Therefore, it is particularly important to develop an antimicrobial packaging material with long-lasting antimicrobial properties and safety and stability. Summary of the invention

[0003] The purpose of the present invention is to provide an antibacterial packaging material and a preparation method thereof, aiming to effectively extend the shelf life of food.

[0004] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions, mainly including:

[0005] 10-20 parts of lauryl alcohol polyoxyethylene ether, 20-30 parts of ethylene-propylene copolymer, 5-10 parts of acetyl tributyl citrate, 3-5 parts of dihydroxymethyl dihydroxyethylene urea, 10-15 parts of trehalose, 5-8 parts of ethylene bis stearamide, 2-4 parts of sodium hypophosphite, 8-12 parts of lysine isocyanate, 15-25 parts of cellulose acetate butyrate, 2-3 parts of antioxidant, 1-2 parts of coupling agent, and 5-10 parts of nano silver particles.

[0006] Furthermore, the antibacterial packaging material has a thickness of 0.05 mm to 1 mm.

[0007] Furthermore, the invention also includes an appropriate amount of auxiliary antibacterial agent.

[0008] Furthermore, the auxiliary antibacterial agent is one of zinc ions and copper ions to enhance the overall antibacterial effect.

[0009] Furthermore, the weight portion of the copper ion auxiliary antibacterial agent is 0.5-2 parts.

[0010] Furthermore, the weight portion of the zinc ion auxiliary antibacterial agent is 1-3 parts.

[0011] A method for preparing an antibacterial packaging material, characterized in that it comprises the following steps:

[0012] A: lauryl alcohol polyoxyethylene ether, ethylene-propylene copolymer, acetyl tributyl citrate, and dimethylol dihydroxyethylene urea are mixed, and an ultrasonic dispersion technique is used to prepare a uniform dispersed mixture;

[0013] B: dissolving trehalose in an ethanol solution, then adding ethylene bis stearamide and sodium hypophosphite, heating to 60-70° C. and stirring continuously for 2-3 hours to obtain modified trehalose;

[0014] C: The ultrasonic dispersion mixture and modified trehalose are mixed with lysine isocyanate, cellulose acetate butyrate, an antioxidant, a coupling agent and nano-silver particles, extruded and granulated by a twin-screw extruder, and then subjected to microwave drying and compression molding to obtain an antibacterial packaging material.

[0015] Furthermore, the microwave drying time is 12 hours and the temperature is 55°C.

[0016] Beneficial effects:

[0017] The present invention provides an antibacterial packaging material and a preparation method thereof, which mainly comprises components such as lauryl alcohol polyoxyethylene ether, ethylene-propylene copolymer, acetylcitrate tributyl, dihydroxymethyl dihydroxyethylene urea, trehalose, ethylene bis stearamide, sodium hypophosphite, lysine isocyanate, cellulose acetate butyrate, antioxidant, coupling agent and nano silver particles, which are proportioned according to a certain weight ratio. The antibacterial packaging material and the preparation method thereof disclosed by the present invention have simple process, are suitable for large-scale industrial production, have antibacterial effect, can effectively inhibit the growth of bacteria on the surface of food, prolong the shelf life of food, adopt sustained-release technology, can make the antibacterial agent be slowly released, effectively prolong the antibacterial time, reduce the amount of antibacterial agent used, and improve the safety and stability of the antibacterial packaging material. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The present invention discloses an antibacterial packaging material and a preparation method thereof, which is prepared by the following raw materials in parts by weight: 10-20 parts of lauryl alcohol polyoxyethylene ether, 20-30 parts of ethylene-propylene copolymer, 5-10 parts of acetyl tributyl citrate, 3-5 parts of dihydroxymethyl dihydroxy ethylene urea, 10-15 parts of trehalose, 5-8 parts of ethylene bis stearamide, 2-4 parts of sodium hypophosphite, 8-12 parts of lysine isocyanate, 15-25 parts of cellulose acetate butyrate, 2-3 parts of antioxidant, 1-2 parts of coupling agent, and 5-10 parts of nano silver particles.

[0020] The technical solutions provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0021] Example 1

[0022] According to the following parts by mass, 15 parts of lauryl alcohol polyoxyethylene ether, 25 parts of ethylene-propylene copolymer, 8 parts of acetylcitrate tributyl ester and 4 parts of dihydroxymethyl dihydroxyethylene urea were weighed, and after mixing, a uniform dispersed mixture was prepared by ultrasonic dispersion technology; 12 parts of trehalose were weighed, dissolved in an appropriate amount of ethanol solution, and then 6 parts of ethylene bis stearamide and 3 parts of sodium hypophosphite were added, the temperature was raised to 65°C and stirred for 2.5 hours to obtain modified trehalose; the ultrasonic dispersion mixture and the modified trehalose were mixed with 10 parts of lysine isocyanate, 20 parts of cellulose acetate butyrate, 2.5 parts of antioxidant, 1.5 parts of coupling agent and 8 parts of nano silver particles, extruded and granulated by a twin-screw extruder, and then microwave dried and compression molded to obtain an antibacterial packaging material.

[0023] Example 2

[0024] According to the following parts by mass, 12 parts of lauryl alcohol polyoxyethylene ether, 28 parts of ethylene-propylene copolymer, 6 parts of acetylcitrate tributyl ester and 5 parts of dihydroxymethyl dihydroxyethylene urea were weighed, and after mixing, a uniform dispersed mixture was prepared by ultrasonic dispersion technology; 15 parts of trehalose were weighed, dissolved in an appropriate amount of ethanol solution, and then 7 parts of ethylene bis stearamide and 4 parts of sodium hypophosphite were added, the temperature was raised to 68°C and stirred for 3 hours to obtain modified trehalose; the ultrasonic dispersion mixture and the modified trehalose were mixed with 9 parts of lysine isocyanate, 18 parts of cellulose acetate butyrate, 3 parts of antioxidant, 2 parts of coupling agent and 7 parts of nano silver particles, extruded and granulated by a twin-screw extruder, and then microwave dried and compression molded to obtain an antibacterial packaging material.

[0025] Example 3

[0026] According to the following parts by mass, 18 parts of lauryl alcohol polyoxyethylene ether, 22 parts of ethylene-propylene copolymer, 7 parts of acetylcitrate tributyl ester, and 4.5 parts of dihydroxymethyl dihydroxyethylene urea were weighed, and after mixing, a uniform dispersed mixture was prepared by ultrasonic dispersion technology; 13 parts of trehalose were weighed, dissolved in an appropriate amount of ethanol solution, and then 5.5 parts of ethylene bis stearamide and 2.5 parts of sodium hypophosphite were added, the temperature was raised to 63°C and stirred for 2.8 hours to obtain modified trehalose; the ultrasonic dispersion mixture and the modified trehalose were mixed with 11 parts of lysine isocyanate, 21 parts of cellulose acetate butyrate, 2.8 parts of antioxidant, 1.8 parts of coupling agent and 9 parts of nano silver particles, extruded and granulated by a twin-screw extruder, and then microwave dried and compression molded to obtain an antibacterial packaging material.

[0027] Example 4

[0028] According to the following parts by mass, 16 parts of lauryl alcohol polyoxyethylene ether, 26 parts of ethylene-propylene copolymer, 9 parts of acetylcitrate tributyl ester, and 4.8 parts of dihydroxymethyl dihydroxyethylene urea were weighed, and after mixing, a uniform dispersed mixture was prepared by ultrasonic dispersion technology; 14 parts of trehalose were weighed, dissolved in an appropriate amount of ethanol solution, and then 6.5 parts of ethylene bis stearamide and 3.2 parts of sodium hypophosphite were added, the temperature was raised to 66°C and stirred for 2.9 hours to obtain modified trehalose; the ultrasonic dispersion mixture and the modified trehalose were mixed with 10.5 parts of lysine isocyanate, 19 parts of cellulose acetate butyrate, 3.2 parts of antioxidant, 1.7 parts of coupling agent and 8.5 parts of nano silver particles, extruded and granulated by a twin-screw extruder, and then microwave dried and compression molded to obtain an antibacterial packaging material.

[0029] It can be seen from the above embodiments that the present invention provides an antibacterial packaging material and a preparation method thereof, which is prepared by the following raw materials in mass fractions: 10-20 parts of lauryl alcohol polyoxyethylene ether, 20-30 parts of ethylene-propylene copolymer, 5-10 parts of acetylcitrate tributyl ester, 3-5 parts of dihydroxymethyl dihydroxyethylene urea, 10-15 parts of trehalose, 5-8 parts of ethylene bis stearamide, 2-4 parts of sodium hypophosphite, 8-12 parts of lysine isocyanate, 15-25 parts of cellulose acetate butyrate, 2-3 parts of antioxidant, 1-2 parts of coupling agent, 5-10 parts of nano silver particles, and the proportions are made according to a certain weight ratio. The antibacterial packaging material and the preparation method thereof disclosed in the present invention have simple process, are suitable for large-scale industrial production, have antibacterial effect, can effectively inhibit the growth of bacteria on the surface of food, prolong the shelf life of food, adopt sustained-release technology, can make the antibacterial agent slowly released, effectively prolong the antibacterial time, reduce the amount of antibacterial agent used, and improve the safety and stability of the antibacterial packaging material.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An antibacterial packaging material, characterized in that: The invention mainly comprises the following by weight: 10-20 parts of lauryl alcohol polyoxyethylene ether, 20-30 parts of ethylene-propylene copolymer, 5-10 parts of acetyl tributyl citrate, 3-5 parts of dihydroxymethyl dihydroxyethylene urea, 10-15 parts of trehalose, 5-8 parts of ethylene bis stearamide, 2-4 parts of sodium hypophosphite, 8-12 parts of lysine isocyanate, 15-25 parts of cellulose acetate butyrate, 2-3 parts of antioxidant, 1-2 parts of coupling agent and 5-10 parts of nano silver particles.

2. The antibacterial packaging material according to claim 1, characterized in that: The thickness of the antibacterial packaging material is 0.05 mm to 1 mm.

3. The antibacterial packaging material according to claim 1, characterized in that: The invention also includes an appropriate amount of auxiliary antibacterial agent.

4. The antibacterial packaging material according to claim 3, characterized in that: The auxiliary antibacterial agent is one of zinc ions and copper ions to enhance the overall antibacterial effect.

5. The method for preparing the antibacterial packaging material according to claim 4, characterized in that: The weight portion of the copper ion auxiliary antibacterial agent is 0.5-2 parts.

6. The method for preparing the antibacterial packaging material according to claim 4, characterized in that: The weight portion of the zinc ion auxiliary antibacterial agent is 1-3 parts.

7. A method for preparing an antibacterial packaging material, characterized in that: The following steps are involved: A: lauryl alcohol polyoxyethylene ether, ethylene-propylene copolymer, acetyl tributyl citrate, and dimethylol dihydroxyethylene urea are mixed, and an ultrasonic dispersion technique is used to prepare a uniform dispersed mixture; B: dissolving trehalose in an ethanol solution, then adding ethylene bis stearamide and sodium hypophosphite, heating to 60-70° C. and stirring continuously for 2-3 hours to obtain modified trehalose; C: The ultrasonic dispersion mixture and modified trehalose are mixed with lysine isocyanate, cellulose acetate butyrate, an antioxidant, a coupling agent and nano-silver particles, extruded and granulated by a twin-screw extruder, and then subjected to microwave drying and compression molding to obtain an antibacterial packaging material.

8. The method for preparing the antibacterial packaging material according to claim 5, characterized in that: The microwave drying time is 12 hours and the temperature is 55°C.