阅读说明：本技术 一种食品保鲜包装膜材料的制备方法 (Preparation method of food fresh-keeping packaging film material ) 是由 高宏业 于 2021-09-28 设计创作，主要内容包括：本发明公开了一种食品保鲜包装膜材料的制备方法,包括如下步骤：步骤1,将二氧化硅、氧化锌混合,并经过粉碎和烘干得到物料混合物；步骤2,制备包装膜的降解混合物；步骤3,将步骤1的物料混合物和步骤2得到的混合物分别加水混合,接着加入助剂,再次进行搅拌,挤出塑炼经吹膜设备上吹膜,即可得到食品用环保包装膜。本发明采用氧化锌作为主料,利用氧化锌具有很强的化学活性,能使各种微生物发生有机分解,产生很好的抗菌效果；另外还配合有降解混合物成型,能够有效改善包装膜的机械性能,还可以显著提高包装膜的耐水性、拉伸强度；同时使得增强包装膜的综合性能。(The invention discloses a preparation method of a food fresh-keeping packaging film material, which comprises the following steps: step 1, mixing silicon dioxide and zinc oxide, and crushing and drying to obtain a material mixture; step 2, preparing a degradation mixture of the packaging film; and 3, respectively adding water into the material mixture obtained in the step 1 and the mixture obtained in the step 2 for mixing, then adding the auxiliary agent, stirring again, extruding and plastifying, and blowing the film on film blowing equipment to obtain the environment-friendly packaging film for food. According to the invention, zinc oxide is used as a main material, and the zinc oxide has strong chemical activity, so that various microorganisms can be organically decomposed, and a good antibacterial effect is achieved; in addition, the degradable plastic film is matched with a degradation mixture for molding, so that the mechanical property of the packaging film can be effectively improved, and the water resistance and the tensile strength of the packaging film can be remarkably improved; and simultaneously, the comprehensive performance of the packaging film is enhanced.)

1. A preparation method of food fresh-keeping packaging film material is characterized in that; the method comprises the following steps:

step 1, mixing silicon dioxide and zinc oxide, and crushing and drying to obtain a material mixture;

step 2, preparing a degradation mixture of the packaging film;

and 3, respectively adding water into the material mixture obtained in the step 1 and the mixture obtained in the step 2 for mixing, simultaneously heating, preserving heat and stirring, then adding an antioxidant, a silane coupling agent, a plasticizer, a heat stabilizer and an antistatic agent, stirring again, extruding and plastifying, and blowing the film on film blowing equipment to obtain the environment-friendly packaging film for food.

2. The method for preparing the food fresh-keeping packaging film material according to claim 1, wherein; the operation of preparing the degradation mixture of the packaging film in the step 2 is as follows; mixing dry starch with water, stirring to form starch emulsion, placing the starch emulsion in a water bath kettle, and adding acetic acid, magnesium stearate, epoxy glycol oleate, fatty acid pentaerythritol ester, oxidized polyethylene wax and glycerol; then stirring for 30-60 minutes to form a mixture A;

pulverizing the highland barley bran and the soybean cellulose, and sieving with a 100-mesh and 150-mesh sieve to obtain a powdery mixture; taking the powdery mixture, adding corresponding deionized water to prepare suspension; then adding chitosan, heating to 70-80 ℃, and stirring until the chitosan is completely dissolved to form a mixture B;

and transferring the mixture A and the mixture B into a heating kettle, heating the mixture by the heating kettle, stirring and mixing the mixture uniformly, and then adding the mixture into an extruder for extrusion granulation to obtain particles.

3. The method for preparing the food fresh-keeping packaging film material according to claim 2, wherein; the highland barley bran and the soybean cellulose chitosan are mixed according to the weight ratio of 1: 1: 1 mass proportion.

4. The method for preparing the food fresh-keeping packaging film material according to claim 1, wherein;

in the step 1, the ratio of the silicon dioxide to the zinc oxide is 1: 1, adding in a mass ratio;

in the step 2, adding acetic acid, magnesium stearate, epoxy ethylene glycol oleate, fatty acid pentaerythritol ester, oxidized polyethylene wax and glycerol according to the following mass part ratio; 5-8 parts of acetic acid, 1-3 parts of magnesium stearate, 3-6 parts of ethylene glycol epoxy oleate, 3-6 parts of fatty acid pentaerythritol ester, 1-3 parts of oxidized polyethylene wax and 10-20 parts of glycerol;

in the step 3, an antioxidant, a silane coupling agent, a plasticizer, a heat stabilizer and an antistatic agent are added according to the following mass part ratio; 5-8 parts of antioxidant, 2-4 parts of silane coupling agent, 30-50 parts of plasticizer, 5-10 parts of heat stabilizer and 1-2 parts of antistatic agent.

5. The method for preparing the food fresh-keeping packaging film material according to claim 1 or 4, characterized in that; the antioxidant is one of antioxidant 1010, antioxidant 168 or antioxidant 1076.

6. The method for preparing the food fresh-keeping packaging film material according to claim 2, wherein;

the reaction temperature of the heating kettle is 70-80 ℃.

7. The method for preparing the food fresh-keeping packaging film material according to claim 1, wherein; the feeding temperature of the film blowing machine during film blowing is 120-150 ℃.

8. The method for preparing the food fresh-keeping packaging film material according to claim 1, wherein; the stirring speed is 100-120 r/min.

9. The method for preparing the food fresh-keeping packaging film material according to claim 2, wherein; the stirring speed is 100-120 r/min.

10. The method for preparing the food fresh-keeping packaging film material according to claim 1, wherein; and (3) sterilizing at the temperature of 120-125 ℃ before extrusion plastication in the step 3.

Technical Field

The invention relates to the field of preparation of packaging film materials, in particular to a preparation method of a food fresh-keeping packaging film material.

Background

As is well known, food packaging films are polymeric materials used to wrap the surface of food, primarily to isolate the entry of microbial bacteria and foreign contaminants, preventing and prolonging the deterioration of food. The antibacterial film package is most beneficial to food, and can continuously inhibit the growth of microorganisms through an antibacterial agent, ensure the safety of the food and prolong the shelf life of the food. Meanwhile, the fine package also plays a role in decorating and beautifying the appearance, attractive package attracts consumers on the basis of delicious food, the requirement of people on the delicious food can be met, the life of the people can be beautified, and the consumers can enjoy higher life quality. Therefore, the sale of the food is promoted, and more economic benefits are brought to merchants. Especially for children's foods, confectionery foods, etc.

In addition, the flexible packaging plastic not only can adopt different plastics and different formulas to manufacture various single-layer films with different performances through different processes, but also can obtain hundreds of different varieties through different combinations among various materials to meet various different requirements. The requirements of packaging of a plurality of commodities can be met by reasonably selecting varieties by utilizing the characteristic that different flexible packaging materials have different properties. Food packaging films of different compositions are also currently available.

The invention of application number CN201811267870.X discloses an environment-friendly food packaging film, which comprises the following raw materials in parts by weight: 50-70 parts of low-density polyethylene, 40-60 parts of starch, 30-50 parts of polyvinyl chloride, 6-12 parts of ceramic powder, 5-9 parts of calcium carbonate, 10-20 parts of modified hydrotalcite, 5-9 parts of titanium dioxide, 1-3 parts of zinc oxide, 5-8 parts of epoxidized soybean oil, 2-5 parts of glycerol, 2-4 parts of methyl cellulose and 1-3 parts of magnesium stearate; wherein, the raw materials of the modified hydrotalcite comprise hydrotalcite, calcium sorbate, berberine hydrochloride, sodium dodecyl sulfate and deionized water.

The invention of application number CN201710218121.7 relates to a preparation method of an edible food packaging film, which comprises the following steps: preparing acorn powder into acorn powder paste; preparing chitosan into a chitosan solution; mixing the chitosan solution and the acorn starch paste according to the amount of 30-80 parts by weight of acorn powder and 10-60 parts by weight of chitosan, adding 0-10 parts by weight of nano zinc oxide, and processing to obtain a film-forming material; and adding the film forming material into a mold, and evaporating and drying to form the edible food packaging film.

However, the current commercial development leads to the drastic increase of the consumption of packaging materials, especially the film materials, which are widely used as the lightest packaging materials, also cause a great amount of white pollution, the development has excellent performance, and the degradable film materials have great economic and social benefits; on the other hand, for food preservative packaging films, it is desirable to obtain corresponding tear resistance and antibacterial properties.

Disclosure of Invention

Therefore, in order to solve the above disadvantages, the invention provides a preparation method of a food fresh-keeping packaging film material, which adopts zinc oxide as a main material, is mixed with silicon dioxide, and utilizes the strong chemical activity of the zinc oxide, so that various microorganisms can be organically decomposed, a good antibacterial effect can be generated, and the antibacterial effect of the packaging film can be enhanced; in addition, the method is matched with the forming of a degradation mixture, so that the mechanical property of the packaging film can be effectively improved, and the water resistance and the tensile strength of the packaging film can be obviously improved; meanwhile, an antioxidant, a silane coupling agent, a plasticizer, a heat stabilizer and an antistatic agent are fused, so that the comprehensive performance of the packaging film is enhanced. Compared with the existing packaging film, the packaging film prepared by the invention is easy to biodegrade, greatly reduces the pollution to the environment, has good mechanical property, tear resistance, antibacterial property and water resistance, is lighter and more light, has good comprehensive performance and can better meet the application in actual life.

The invention is realized by constructing a preparation method of the food fresh-keeping packaging film material; the method comprises the following steps:

step 1, mixing silicon dioxide and zinc oxide, and crushing and drying to obtain a material mixture;

step 2, preparing a degradation mixture of the packaging film;

and 3, respectively adding water into the material mixture obtained in the step 1 and the mixture obtained in the step 2 for mixing, simultaneously heating, preserving heat and stirring, then adding an antioxidant, a silane coupling agent, a plasticizer, a heat stabilizer and an antistatic agent, stirring again, extruding and plastifying, and blowing the film on film blowing equipment to obtain the environment-friendly packaging film for food.

As an improvement of the above technical solution, the operation of preparing the degradation mixture of the packaging film in step 2 is as follows; mixing dry starch with water, stirring to form starch emulsion, placing the starch emulsion in a water bath kettle, and adding acetic acid, magnesium stearate, epoxy glycol oleate, fatty acid pentaerythritol ester, oxidized polyethylene wax and glycerol; then stirring for 30-60 minutes to form a mixture A;

pulverizing the highland barley bran and the soybean cellulose, and sieving with a 100-mesh and 150-mesh sieve to obtain a powdery mixture; taking the powdery mixture, adding corresponding deionized water to prepare suspension; then adding chitosan, heating to 70-80 ℃, and stirring until the chitosan is completely dissolved to form a mixture B;

and transferring the mixture A and the mixture B into a heating kettle, heating the mixture by the heating kettle, stirring and mixing the mixture uniformly, and then adding the mixture into an extruder for extrusion granulation to obtain particles.

As an improvement of the technical scheme, the highland barley bran and the soybean cellulose chitosan are mixed according to the weight ratio of 1: 1: 1 mass proportion.

As an improvement of the above-mentioned technical solution,

in the step 1, the ratio of the silicon dioxide to the zinc oxide is 1: 1, adding in a mass ratio;

in the step 2, adding acetic acid, magnesium stearate, epoxy ethylene glycol oleate, fatty acid pentaerythritol ester, oxidized polyethylene wax and glycerol according to the following mass part ratio; 5-8 parts of acetic acid, 1-3 parts of magnesium stearate, 3-6 parts of ethylene glycol epoxy oleate, 3-6 parts of fatty acid pentaerythritol ester, 1-3 parts of oxidized polyethylene wax and 10-20 parts of glycerol;

in the step 3, an antioxidant, a silane coupling agent, a plasticizer, a heat stabilizer and an antistatic agent are added according to the following mass part ratio; 5-8 parts of antioxidant, 2-4 parts of silane coupling agent, 30-50 parts of plasticizer, 5-10 parts of heat stabilizer and 1-2 parts of antistatic agent.

As an improvement of the technical scheme, the antioxidant is one of an antioxidant 1010, an antioxidant 168 or an antioxidant 1076.

As an improvement of the technical scheme, the reaction temperature of the heating kettle is 70-80 ℃.

As an improvement of the technical scheme, the feeding temperature of the film blowing machine during film blowing is 120-150 ℃.

As an improvement of the technical proposal, the stirring speed is 100-120 r/min.

As an improvement of the technical proposal, the stirring speed is 100-120 r/min.

As an improvement of the technical proposal, the step 3 is sterilized at the temperature of 120-125 ℃ before extrusion plastication.

The invention has the following advantages: the invention provides a preparation method of a food fresh-keeping packaging film material; the packaging film adopts zinc oxide as a main material, is mixed with silicon dioxide, and utilizes the strong chemical activity of the zinc oxide, so that various microorganisms can be organically decomposed, a good antibacterial effect is generated, and the antibacterial effect of the packaging film is enhanced; in addition, the method is matched with the forming of a degradation mixture, so that the mechanical property of the packaging film can be effectively improved, and the water resistance and the tensile strength of the packaging film can be obviously improved; meanwhile, an antioxidant, a silane coupling agent, a plasticizer, a heat stabilizer and an antistatic agent are fused, so that the comprehensive performance of the packaging film is enhanced. Compared with the existing packaging film, the packaging film prepared by the invention is easy to biodegrade, greatly reduces the pollution to the environment, has good mechanical property, tear resistance, antibacterial property and water resistance, is lighter and more light, has good comprehensive performance and can better meet the application in actual life.

Detailed Description

The present invention will be described in detail with reference to embodiments, and technical solutions in the embodiments of the present invention will be clearly and completely described below. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a preparation method of a food fresh-keeping packaging film material by improvement, which is implemented in the following way

Embodiment 1, a method for preparing a food preservative packaging film material, comprising the following steps:

step 1, mixing silicon dioxide and zinc oxide, wherein the ratio of silicon dioxide to zinc oxide is 1: 1, adding in a mass ratio; and crushing and drying to obtain a material mixture.

Step 2, preparing a degradation mixture of the packaging film; the operation is as follows; firstly, mixing dry starch with water, stirring to form starch emulsion, placing the starch emulsion in a water bath kettle, and adding the starch emulsion according to the following mass part ratio; 5 parts of acetic acid, 1 part of magnesium stearate, 3 parts of epoxy glycol oleate, 3 parts of fatty acid pentaerythritol ester, 1 part of oxidized polyethylene wax and 10 parts of glycerol; then stirring for 30 minutes to form a mixture A, and stirring at a low speed of 100 revolutions per minute; pulverizing the highland barley bran and the soybean cellulose, and sieving with a 100-mesh sieve to obtain a powdery mixture; taking the powdery mixture, adding corresponding deionized water to prepare suspension; then adding chitosan, heating to 70 ℃, and stirring until the chitosan is completely dissolved to form a mixture B; and transferring the mixture A and the mixture B into a heating kettle, heating the mixture A and the mixture B by the heating kettle to raise the temperature, wherein the reaction temperature of the heating kettle is 70 ℃, stirring and mixing the mixture A and the mixture B uniformly, and then adding the mixture A into an extruder to extrude and granulate to obtain particles. In the operation, the highland barley bran and the soybean cellulose chitosan are mixed according to the weight ratio of 1: 1: 1 mass proportion.

And 3, mixing the material mixture obtained in the step 1 and the mixture obtained in the step 2 according to the mass ratio of 3: 1, mixing, adding water for mixing, heating and stirring at the same time, and then adding the materials according to the following mass part ratio; 5 parts of antioxidant, 2 parts of silane coupling agent, 30 parts of plasticizer, 5 parts of heat stabilizer and 1 part of antistatic agent, stirring again at a low speed of 100 revolutions per minute, extruding and plasticating, and blowing the film on a film blowing device, wherein the feeding temperature of the film blowing machine during film blowing is 120 ℃, so that the environment-friendly packaging film for food can be obtained.

When in implementation; the antioxidant is one of antioxidant 1010, antioxidant 168 or antioxidant 1076.

Embodiment 2, a method for preparing a food preservative packaging film material, comprising the following steps:

step 1, mixing silicon dioxide and zinc oxide, wherein the ratio of silicon dioxide to zinc oxide is 1: 1, adding in a mass ratio; and crushing and drying to obtain a material mixture.

Step 2, preparing a degradation mixture of the packaging film; the operation is as follows; firstly, mixing dry starch with water, stirring to form starch emulsion, placing the starch emulsion in a water bath kettle, and adding the starch emulsion according to the following mass part ratio; 6 parts of acetic acid, 2 parts of magnesium stearate, 4 parts of epoxy ethylene glycol oleate, 4 parts of fatty acid pentaerythritol ester, 2 parts of oxidized polyethylene wax and 15 parts of glycerol; then stirring for 45 minutes to form a mixture A, and stirring at a low speed of 110 revolutions per minute; pulverizing the highland barley bran and the soybean cellulose, and sieving with a 120-mesh sieve to obtain a powdery mixture; taking the powdery mixture, adding corresponding deionized water to prepare suspension; then adding chitosan, heating to 75 ℃, and stirring until the chitosan is completely dissolved to form a mixture B; and transferring the mixture A and the mixture B into a heating kettle, heating the mixture A and the mixture B by the heating kettle to raise the temperature, wherein the reaction temperature of the heating kettle is 75 ℃, stirring and mixing the mixture uniformly, and then adding the mixture into an extruder to extrude and granulate to obtain particles. In the operation, the highland barley bran and the soybean cellulose chitosan are mixed according to the weight ratio of 1: 1: 1 mass proportion.

And 3, mixing the material mixture obtained in the step 1 and the mixture obtained in the step 2 according to the mass ratio of 3: 1, mixing, adding water, mixing, heating, keeping the temperature and stirring, and adding the materials according to the following mass part ratio; 6 parts of antioxidant, 3 parts of silane coupling agent, 40 parts of plasticizer, 7 parts of heat stabilizer and 1.5 parts of antistatic agent, stirring again at a low speed of 110 rpm, extruding and plasticating, and blowing the plastic film on a film blowing device, wherein the feeding temperature of the film blowing machine during film blowing is 130 ℃, so that the environment-friendly packaging film for food can be obtained.

When in implementation; the antioxidant is one of antioxidant 1010, antioxidant 168 or antioxidant 1076.

Embodiment 3, a method for preparing a food preservative packaging film material, comprising the following steps:

step 1, mixing silicon dioxide and zinc oxide, wherein the ratio of silicon dioxide to zinc oxide is 1: 1, adding in a mass ratio; and crushing and drying to obtain a material mixture.

Step 2, preparing a degradation mixture of the packaging film; the operation is as follows; firstly, mixing dry starch with water, stirring to form starch emulsion, placing the starch emulsion in a water bath kettle, and adding the starch emulsion according to the following mass part ratio; 7 parts of acetic acid, 2 parts of magnesium stearate, 5 parts of epoxy ethylene glycol oleate, 5 parts of fatty acid pentaerythritol ester, 12 parts of oxidized polyethylene wax and 18 parts of glycerol; then stirring for 50 minutes to form a mixture A, and stirring at a low speed of 110 revolutions per minute; pulverizing the highland barley bran and the soybean cellulose, and sieving with a 140-mesh sieve to obtain a powdery mixture; taking the powdery mixture, adding corresponding deionized water to prepare suspension; then adding chitosan, heating to 78 ℃, and stirring until the chitosan is completely dissolved to form a mixture B; and transferring the mixture A and the mixture B into a heating kettle, heating the mixture A and the mixture B by the heating kettle to increase the temperature, wherein the reaction temperature of the heating kettle is 78 ℃, stirring and mixing the mixture A and the mixture B uniformly, and then adding the mixture A into an extruder to extrude and granulate to obtain particles. In the operation, the highland barley bran and the soybean cellulose chitosan are mixed according to the weight ratio of 1: 1: 1 mass proportion.

And 3, mixing the material mixture obtained in the step 1 and the mixture obtained in the step 2 according to a mass ratio of 4: 1, mixing, adding water for mixing, heating and stirring at the same time, and then adding the materials according to the following mass part ratio; 7 parts of antioxidant, 3 parts of silane coupling agent, 40 parts of plasticizer, 8 parts of heat stabilizer and 1.5 parts of antistatic agent, stirring again at a low speed of 140 r/min, extruding and plasticating, and blowing the plastic film on a film blowing device, wherein the feeding temperature of the film blowing machine during film blowing is 140 ℃, so that the environment-friendly packaging film for food can be obtained.

When in implementation; the antioxidant is one of antioxidant 1010, antioxidant 168 or antioxidant 1076.

Embodiment 4, a method for preparing a food preservative packaging film material, comprising the following steps:

step 1, mixing silicon dioxide and zinc oxide, wherein the ratio of silicon dioxide to zinc oxide is 1: 1, adding in a mass ratio; and crushing and drying to obtain a material mixture.

Step 2, preparing a degradation mixture of the packaging film; the operation is as follows; firstly, mixing dry starch with water, stirring to form starch emulsion, placing the starch emulsion in a water bath kettle, and adding the starch emulsion according to the following mass part ratio; 8 parts of acetic acid, 3 parts of magnesium stearate, 6 parts of epoxy ethylene glycol oleate, 6 parts of fatty acid pentaerythritol ester, 3 parts of oxidized polyethylene wax and 20 parts of glycerol; then stirring for 60 minutes to form a mixture A, and stirring at a low speed of 120 revolutions per minute; pulverizing the highland barley bran and the soybean cellulose, and sieving with a 150-mesh sieve to obtain a powdery mixture; taking the powdery mixture, adding corresponding deionized water to prepare suspension; then adding chitosan, heating to 80 ℃, and stirring until the chitosan is completely dissolved to form a mixture B; and transferring the mixture A and the mixture B into a heating kettle, heating the mixture A and the mixture B by the heating kettle to raise the temperature, wherein the reaction temperature of the heating kettle is 70-80 ℃, stirring and mixing the mixture uniformly, and then adding the mixture into an extruder to extrude and granulate to obtain particles. In the operation, the highland barley bran and the soybean cellulose chitosan are mixed according to the weight ratio of 1: 1: 1 mass proportion.

And 3, mixing the material mixture obtained in the step 1 and the mixture obtained in the step 2 according to the mass ratio of 7: 1, mixing, adding water for mixing, heating and stirring at the same time, and then adding the materials according to the following mass part ratio; 8 parts of antioxidant, 4 parts of silane coupling agent, 50 parts of plasticizer, 10 parts of heat stabilizer and 2 parts of antistatic agent, stirring again at a low stirring speed of 120 revolutions per minute, extruding and plasticating, sterilizing at the temperature of 120 plus of 125 ℃, blowing the film on a film blowing device, wherein the feeding temperature of the film blowing machine during film blowing is 150 ℃, and thus the environment-friendly packaging film for food can be obtained.

The antioxidant is one of antioxidant 1010, antioxidant 168 or antioxidant 1076.

The invention provides a preparation method of a food fresh-keeping packaging film material; the packaging film adopts zinc oxide as a main material, is mixed with silicon dioxide, and utilizes the strong chemical activity of the zinc oxide, so that various microorganisms can be organically decomposed, a good antibacterial effect is generated, and the antibacterial effect of the packaging film is enhanced; in addition, the method is matched with the forming of a degradation mixture, so that the mechanical property of the packaging film can be effectively improved, and the water resistance and the tensile strength of the packaging film can be obviously improved; meanwhile, an antioxidant, a silane coupling agent, a plasticizer, a heat stabilizer and an antistatic agent are fused, so that the comprehensive performance of the packaging film is enhanced. Compared with the existing packaging film, the packaging film prepared by the invention is easy to biodegrade, greatly reduces the pollution to the environment, has good mechanical property, tear resistance, antibacterial property and water resistance, is lighter and more light, has good comprehensive performance and can better meet the application in actual life.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.