CN112280153A - Traditional Chinese medicine granule packaging bag and preparation method thereof - Google Patents
Traditional Chinese medicine granule packaging bag and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a traditional Chinese medicine granule packaging bag which comprises the following raw materials, by weight, 90-100 parts of low-density polyethylene, 7-15 parts of linear low-density polyethylene, 5-10 parts of propylene glycol, 1-4 parts of nano titanium dioxide, 3-5 parts of citric acid, 0.1-0.4 part of antioxidant, 1-2 parts of potassium sorbate, 20-30 parts of toughening master batch and 3-5 parts of antibacterial agent; the traditional Chinese medicine granule packaging bag is prepared by adopting low-density polyethylene and linear low-density polyethylene as main materials and adding toughening master batches and other auxiliary agents, has good antibacterial property, strong mechanical property, high barrier property, environmental protection and no pollution, can prevent traditional Chinese medicine granules from being affected with damp or oxidized, and provides a sterile and dry storage environment for the traditional Chinese medicine granules.
Description
Technical Field
The invention belongs to the technical field of medicine packaging, and particularly relates to a traditional Chinese medicine granule packaging bag and a preparation method thereof.
Background
The traditional Chinese medicine granules are prepared by taking traditional Chinese medicine decoction pieces as raw materials and carrying out extraction, separation, concentration, drying, granulation, packaging and other treatments on the whole components of the medicinal materials through a modern processing technology and a pharmaceutical technology, do not need decoction, and can be directly prepared and taken with water. The traditional Chinese medicine decoction pieces have the advantages of ensuring all characteristics of the original traditional Chinese medicine decoction pieces, satisfying the dialectical treatment of doctors, adding and subtracting according to symptoms, strong medicine property, high medicine effect, direct taking, small dosage, quick effect, complete components, exact curative effect, safety, sanitation, convenient carrying and maintenance, easy modulation, suitability for industrial production and the like.
Traditional Chinese medicine particles in the market are usually packaged in plastic bags in small bags, but the single packaging form of the form is often poor in sealing and oxygen resistance for granules containing volatile components, is easily influenced by moisture and oxygen in the air, cannot fully retain the property of the medicine, and meanwhile, the antibacterial property of the medicine packaging bags is not good enough and is easily polluted, so that a traditional Chinese medicine particle packaging bag with good sealing and oxygen resistance is urgently needed to be found.
Disclosure of Invention
The invention aims to provide a traditional Chinese medicine granule packaging bag and a preparation method thereof.
The technical problems to be solved by the invention are as follows:
in the prior art, the sealing and oxygen-blocking performance of the medicine packaging bag is not strong, so that the medicine is easily influenced by moisture and oxygen in the air, the medicine property of the medicine cannot be fully reserved, and meanwhile, the medicine packaging bag has poor antibacterial property and is easy to pollute.
The purpose of the invention can be realized by the following technical scheme:
a traditional Chinese medicine granule packaging bag comprises the following raw materials, by weight, 90-100 parts of low-density polyethylene, 7-15 parts of linear low-density polyethylene, 5-10 parts of propylene glycol, 1-4 parts of nano titanium dioxide, 3-5 parts of citric acid, 0.1-0.4 part of antioxidant, 1-2 parts of potassium sorbate, 20-30 parts of toughening master batch and 3-5 parts of antibacterial agent;
the traditional Chinese medicine granule packaging bag is prepared by the following steps:
firstly, adding low-density polyethylene, linear low-density polyethylene, propylene glycol and toughening master batch into a reaction kettle, controlling the temperature in the reaction kettle to be 190-;
secondly, extruding and granulating the mixture A by using a double-screw extruder to obtain a packaging bag particle raw material, wherein the extrusion temperature is divided into 4 zones, the temperature of the first zone is 110-;
and thirdly, performing film blowing molding on the particle raw materials of the packaging bag prepared in the second step by adopting a single-screw extruder to obtain the packaging bag for the traditional Chinese medicine particles, wherein the feeding temperature during film blowing is 70-75 ℃, the compression plasticizing temperature is 95-115 ℃, and the blow-up ratio is 1: 3, the traction speed is 4-4.2m/min, the length-diameter ratio is 1: 50.
as a further scheme of the invention, the antioxidant is an antioxidant 1010 and an antioxidant 168, wherein the weight ratio of the antioxidant 1010 to the antioxidant 168 is 1:1 is obtained by compounding.
As a further scheme of the invention, the preparation method of the toughening master batch comprises the following steps:
step S11, adding the broadleaf wood dissolving pulp and ferrous sulfate heptahydrate into a beaker, stirring for 5-10min under the condition of the rotation speed of 100-Filtering, and repeatedly washing a filter cake with deionized water until a washing liquid is neutral to obtain oxidized fiber nanofibrils; refining high-concentration Fe in the process2+Loaded on the fiber cell wall to form' Fe2+The fiber composite catalytic system introduces hydrogen peroxide into the system under the condition of high-concentration reaction, limits the oxidation reaction to the inside of a single fiber to the maximum extent, avoids the ineffective decomposition of the hydrogen peroxide outside the fiber, improves the digestion effect, partially oxidizes the hydroxyl of the fiber nano-fibril into aldehyde group or carboxyl, increases the electrostatic repulsion between fibrils, and is beneficial to the dispersion of the fibrils in a polymer;
step S12, adding the oxidized fiber nanofibrils obtained in the step S11 into deionized water, dispersing for 10-15min at an ultrasonic frequency of 60-80kHz to obtain oxidized fiber nanofibrils suspension, and refrigerating the oxidized fiber nanofibrils suspension at 5-8 ℃ for later use;
step S13, adding PVA particles into deionized water, heating in a water bath at 95-100 ℃, reacting for 2-4h at a rotation speed of 200-;
and S14, adding the oxidized fiber nanofibril suspension, glycerol and deionized water into the PVA solution obtained in the step S13, stirring for 3-5min under the condition that the rotating speed is 150-300r/min, then adding a sulfuric acid solution with the volume fraction of 20% to adjust the pH value of the system to be 5, magnetically stirring for 1-3h at the temperature of 60-65 ℃, then ultrasonically degassing for 20-40min to obtain a mixed solution, and extruding and granulating the mixed solution by using a double-screw extruder to obtain the toughening master batch.
As a further scheme of the invention, the mass ratio of the broadleaf wood dissolving pulp, the ferrous sulfate heptahydrate and the hydrogen peroxide in the step S11 is 200-250: 0.03-0.05: 0.08-0.1; the ratio of the amount of the oxidized fiber nanofibrils to the amount of the ionized water in step S12 is 1 g: 1-3 mL; the dosage ratio of the PVA particles to the deionized water in the step S13 is 1 g: 2-4mL, and the volume ratio of the PVA solution, the oxidized fiber nanofibril suspension, the glycerol and the deionized water in the step S14 is 1:1:0.05-0.1: 1-2.
As a further aspect of the present invention, the method for preparing the antibacterial agent comprises the steps of:
step S21, adding 0.1mol/L silver nitrate solution into a brown volumetric flask for later use, adding anhydrous glucose into deionized water, and stirring for 10-20min under the condition of the rotation speed of 100 and 200r/min to obtain a glucose solution for later use;
step S22, adding soluble starch into a beaker, adding deionized water, stirring for 3-5min in advance by using a glass rod, then stirring for 20-30min by magnetic force to obtain a transparent starch solution, dropwise adding 0.1mol/L silver nitrate solution and 0.1mol/L glucose solution into the starch solution in sequence in step S21, stirring for 5-10min under the condition of the rotation speed of 300-80 ℃ and the ultrasonic power of 250-300W, and then reacting for 3-4h to obtain the antibacterial agent.
As a further scheme of the invention, the dosage ratio of the anhydrous glucose to the deionized water in the step S21 is 2 g: 4-5 mL; in the step S22, the dosage ratio of the soluble starch, the deionized water, the silver nitrate solution of 0.1mol/L and the glucose solution is 1-3 g: 5-10 mL: 1mL of: 4 mL.
As a further scheme of the invention, the preparation method of the traditional Chinese medicine granule packaging bag specifically comprises the following steps:
firstly, adding low-density polyethylene, linear low-density polyethylene, propylene glycol and toughening master batch into a reaction kettle, controlling the temperature in the reaction kettle to be 190-;
secondly, extruding and granulating the mixture A by using a double-screw extruder to obtain a packaging bag particle raw material, wherein the extrusion temperature is divided into 4 zones, the temperature of the first zone is 110-;
and thirdly, performing film blowing molding on the particle raw materials of the packaging bag prepared in the second step by adopting a single-screw extruder to obtain the packaging bag for the traditional Chinese medicine particles, wherein the feeding temperature during film blowing is 70-75 ℃, the compression plasticizing temperature is 95-115 ℃, and the blow-up ratio is 1: 3, the traction speed is 4-4.2m/min, the length-diameter ratio is 1: 50.
the invention has the beneficial effects that:
1. the traditional Chinese medicine particle packaging bag is prepared by taking low-density polyethylene and linear low-density polyethylene as main materials and adding other fillers and auxiliaries, and has good antibacterial property, strong mechanical property, high barrier property, environmental friendliness and no pollution, wherein the toughening master batch is formed by compounding fiber nano-fibrils and PVA materials, a large amount of-OH, -COOH and C-O-C exposed on the surface of the oxidized fiber nano-fibrils can form intermolecular hydrogen bond association with-OH of PVA, the intermolecular hydrogen bond proportion in the composite material is greatly increased, the compatibility of the oxidized fiber nano-fibrils and PVA is increased, aldehyde groups in the oxidized fiber nano-fibrils and hydroxyl groups of PVA are subjected to polycondensation crosslinking reaction, and the oxidized fiber nano-fibrils can be interwoven and wound with each other in a polymer matrix to form a unique three-dimensional network structure due to the larger length-diameter ratio in the oxidized fiber nano-fibrils, the composite material can better realize the transfer and diffusion of external load, improve the mechanical property of the composite material, and improve the wear resistance and scratch resistance of the packaging bag and simultaneously improve the thermal stability of the packaging bag by adding the toughening master batch.
2. The invention utilizes the characteristics of light weight, high flexibility, low temperature resistance and good impact resistance of low-density polyethylene and the characteristics of high strength, good toughness, high rigidity, heat resistance and good cold resistance of linear low-density polyethylene, adds nano titanium dioxide, citric acid, an antioxidant, potassium sorbate and an antibacterial agent to enhance the antibacterial, antioxidant and anticorrosive properties of a packaging bag, adopts a liquid phase reduction method, takes starch as a protective agent, adopts glucose with low price and mild reduction capability as a reducing agent, reduces silver nitrate under the ultrasonic oscillation condition, successfully prepares a nano silver sol antibacterial agent which is used as the packaging bag of traditional Chinese medicine particles, can prevent the traditional Chinese medicine particles from being affected with moisture or being oxidized, and provides a sterile and dry storage environment for the traditional Chinese medicine particles.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. 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.
Example 1
A traditional Chinese medicine particle packaging bag comprises the following raw materials, by weight, 90 parts of low-density polyethylene, 7 parts of linear low-density polyethylene, 5 parts of propylene glycol, 1 part of nano titanium dioxide, 3 parts of citric acid, 0.1 part of antioxidant, 1 part of potassium sorbate, 20 parts of toughening master batch and 3 parts of antibacterial agent;
the traditional Chinese medicine granule packaging bag is prepared by the following steps:
firstly, adding low-density polyethylene, linear low-density polyethylene, propylene glycol and toughening master batch into a reaction kettle, controlling the temperature in the reaction kettle to be 160 ℃, stirring for 30min at the rotating speed of 300r/min, then adding nano titanium dioxide, citric acid, an antioxidant, potassium sorbate and an antibacterial agent, and stirring for 3h under the condition of unchanged temperature and rotating speed to obtain a mixture A;
secondly, extruding and granulating the mixture A by using a double-screw extruder to obtain a packaging bag particle raw material, wherein the extrusion temperature is divided into 4 zones, the temperature of the first zone is 100 ℃, the temperature of the second zone is 145 ℃, the temperature of the third zone is 156 ℃, and the temperature of the fourth zone is 170 ℃;
and thirdly, performing film blowing molding on the particle raw materials of the packaging bag prepared in the second step by adopting a single-screw extruder to obtain the packaging bag for the traditional Chinese medicine particles, wherein the feeding temperature during film blowing is 70 ℃, the compression plasticizing temperature is 95 ℃, and the blow-up ratio is 1: 3, the traction speed is 4m/min, the length-diameter ratio is 1: 50.
the antioxidant is an antioxidant 1010 and an antioxidant 168, and the weight ratio is 1:1 is obtained by compounding.
The preparation method of the toughening master batch comprises the following steps:
step S11, adding broadleaf wood dissolving pulp and ferrous sulfate heptahydrate into a beaker, stirring for 5min under the condition of the rotating speed of 100r/min, then transferring into a pulping machine, adjusting the gap of the grinding disc to be 0.5mm, circularly pulping for 3 times, then transferring into the beaker, adding hydrogen peroxide, heating and reacting for 40min under the condition of a water bath at 45 ℃, then filtering, and repeatedly washing a filter cake with deionized water until a washing solution is neutral to obtain oxidized fiber nanofibrils;
step S12, adding the oxidized fiber nanofibrils obtained in the step S11 into deionized water, dispersing for 105min at an ultrasonic frequency of 60kHz to obtain oxidized fiber nanofibrils suspension, and refrigerating the oxidized fiber nanofibrils suspension at 5-8 ℃ for later use;
step S13, adding PVA particles into deionized water, reacting for 2 hours at a rotating speed of 200r/min under a water bath condition of 95 ℃, and then cooling to room temperature to obtain a PVA solution;
and S14, adding the oxidized fiber nanofibril suspension, glycerol and deionized water into the PVA solution obtained in the step S13, stirring for 3min at the rotating speed of 150r/min, then adding a sulfuric acid solution with the volume fraction of 20% to adjust the pH value of the system to be 5, magnetically stirring for 1h at the temperature of 60 ℃, then ultrasonically degassing for 20min to obtain a mixed solution, and extruding and granulating the mixed solution by using a double-screw extruder to obtain the toughening master batch.
The mass ratio of the broadleaf wood dissolving pulp, the ferrous sulfate heptahydrate and the hydrogen peroxide in the step S11 is 200: 0.03: 0.08; the ratio of the amount of the oxidized fiber nanofibrils to the amount of the ionized water in step S12 is 1 g: 1 mL; the dosage ratio of the PVA particles to the deionized water in the step S13 is 1 g: 2mL, the volume ratio of the PVA solution, the oxidized fiber nanofibril suspension, glycerol and deionized water in step S14 was 1:1:0.05: 1.
The preparation method of the antibacterial agent comprises the following steps:
step S21, adding 0.1mol/L silver nitrate solution into a brown volumetric flask for later use, adding anhydrous glucose into deionized water, and stirring for 10min under the condition of the rotating speed of 100r/min to obtain a glucose solution for later use;
and S22, adding soluble starch into a beaker, adding deionized water, stirring for 3min in advance by using a glass rod, then stirring for 20min by magnetic force to obtain a transparent starch solution, dropwise adding 0.1mol/L silver nitrate solution and 0.1mol/L glucose solution into the starch solution in sequence in the step S21, stirring for 5min at the rotation speed of 300r/min, and then reacting for 3h at the temperature of 70 ℃ and the ultrasonic power of 250W to obtain the antibacterial agent.
In step S21, the ratio of the amount of the anhydrous glucose to the amount of the deionized water is 2 g: 4 mL; in the step S22, the dosage ratio of the soluble starch, the deionized water, the 0.1mol/L silver nitrate solution and the glucose solution is 1 g: 5mL of: 1mL of: 4 mL.
Example 2
A traditional Chinese medicine particle packaging bag comprises the following raw materials, by weight, 95 parts of low-density polyethylene, 10 parts of linear low-density polyethylene, 8 parts of propylene glycol, 3 parts of nano titanium dioxide, 4 parts of citric acid, 0.3 part of antioxidant, 1.5 parts of potassium sorbate, 25 parts of toughening master batch and 4 parts of antibacterial agent;
the traditional Chinese medicine granule packaging bag is prepared by the following steps:
firstly, adding low-density polyethylene, linear low-density polyethylene, propylene glycol and toughening master batch into a reaction kettle, controlling the temperature in the reaction kettle to be 175 ℃, stirring for 40min at the rotating speed of 400r/min, then adding nano titanium dioxide, citric acid, an antioxidant, potassium sorbate and an antibacterial agent, and stirring for 4h under the condition of unchanged temperature and rotating speed to obtain a mixture A;
secondly, extruding and granulating the mixture A by using a double-screw extruder to obtain a packaging bag particle raw material, wherein the extrusion temperature is divided into 4 zones, the temperature of the first zone is 105 ℃, the temperature of the second zone is 148 ℃, the temperature of the third zone is 158 ℃, and the temperature of the fourth zone is 175 ℃;
and thirdly, performing film blowing molding on the packaging bag particle raw material prepared in the second step by adopting a single-screw extruder to obtain the traditional Chinese medicine particle packaging bag, wherein the feeding temperature during film blowing is 73 ℃, the compression plasticizing temperature is 105 ℃, and the blow-up ratio is 1: 3, the traction speed is 4.1m/min, the length-diameter ratio is 1: 50.
the antioxidant is an antioxidant 1010 and an antioxidant 168, and the weight ratio is 1:1 is obtained by compounding.
The preparation method of the toughening master batch comprises the following steps:
step S11, adding broadleaf wood dissolving pulp and ferrous sulfate heptahydrate into a beaker, stirring for 8min under the condition of a rotating speed of 150r/min, then transferring into a pulping machine, adjusting the gap of the grinding disc to be 0.5mm, circularly pulping for 4 times, then transferring into the beaker, adding hydrogen peroxide, heating and reacting for 50min under the condition of a water bath at 48 ℃, then filtering, and repeatedly washing a filter cake with deionized water until a washing solution is neutral to obtain oxidized fiber nanofibrils;
step S12, adding the oxidized fiber nanofibrils obtained in the step S11 into deionized water, dispersing for 13min at an ultrasonic frequency of 70kHz to obtain oxidized fiber nanofibrils suspension, and refrigerating the oxidized fiber nanofibrils suspension at 7 ℃ for later use;
step S13, adding PVA particles into deionized water, reacting for 3 hours at a rotating speed of 250r/min under a water bath condition of 98 ℃, and then cooling to room temperature to obtain a PVA solution;
and S14, adding the oxidized fiber nanofibril suspension, glycerol and deionized water into the PVA solution obtained in the step S13, stirring for 4min at the rotating speed of 200r/min, then adding a sulfuric acid solution with the volume fraction of 20% to adjust the pH value of the system to be 5, magnetically stirring for 2h at 63 ℃, then ultrasonically degassing for 30min to obtain a mixed solution, and extruding and granulating the mixed solution by using a double-screw extruder to obtain the toughening master batch.
The mass ratio of the hardwood dissolving pulp, the ferrous sulfate heptahydrate and the hydrogen peroxide in the step S11 is 230: 0.04: 0.09; the ratio of the amount of the oxidized fiber nanofibrils to the amount of the ionized water in step S12 is 1 g: 2 mL; the dosage ratio of the PVA particles to the deionized water in the step S13 is 1 g: 3mL, the volume ratio of the PVA solution, the oxidized fiber nanofibril suspension, the glycerol and the deionized water in step S14 is 1:1:0.08: 1.5.
The preparation method of the antibacterial agent comprises the following steps:
step S21, adding 0.1mol/L silver nitrate solution into a brown volumetric flask for later use, adding anhydrous glucose into deionized water, and stirring for 15min under the condition of a rotation speed of 150r/min to obtain a glucose solution for later use;
and S22, adding soluble starch into a beaker, adding deionized water, stirring for 4min in advance by using a glass rod, then stirring for 25min by magnetic force to obtain a transparent starch solution, dropwise adding the 0.1mol/L silver nitrate solution and the 0.1mol/L glucose solution into the starch solution in sequence in the step S21, stirring for 8min under the condition of the rotation speed of 300-500r/min, and then reacting for 3.5h under the conditions of the temperature of 75 ℃ and the ultrasonic power of 280W to obtain the antibacterial agent.
In step S21, the ratio of the amount of the anhydrous glucose to the amount of the deionized water is 2 g: 4.5 mL; in the step S22, the dosage ratio of the soluble starch, the deionized water, the 0.1mol/L silver nitrate solution and the glucose solution is 2 g: 8mL of: 1mL of: 4 mL.
Example 3
A traditional Chinese medicine granule packaging bag comprises the following raw materials, by weight, 98 parts of low-density polyethylene, 12 parts of linear low-density polyethylene, 8 parts of propylene glycol, 3 parts of nano titanium dioxide, 4 parts of citric acid, 0.3 part of antioxidant, 1.5 parts of potassium sorbate, 28 parts of toughening master batch and 4 parts of antibacterial agent;
the traditional Chinese medicine granule packaging bag is prepared by the following steps:
firstly, adding low-density polyethylene, linear low-density polyethylene, propylene glycol and toughening master batch into a reaction kettle, controlling the temperature in the reaction kettle to be 175 ℃, stirring for 45min at the rotating speed of 450r/min, then adding nano titanium dioxide, citric acid, an antioxidant, potassium sorbate and an antibacterial agent, and stirring for 3-6h under the condition of unchanged temperature and rotating speed to obtain a mixture A;
secondly, extruding and granulating the mixture A by using a double-screw extruder to obtain a packaging bag particle raw material, wherein the extrusion temperature is divided into 4 zones, the temperature of the first zone is 106 ℃, the temperature of the second zone is 148 ℃, the temperature of the third zone is 157 ℃, and the temperature of the fourth zone is 175 ℃;
and thirdly, performing film blowing molding on the packaging bag particle raw material prepared in the second step by adopting a single-screw extruder to obtain the traditional Chinese medicine particle packaging bag, wherein the feeding temperature during film blowing is 73 ℃, the compression plasticizing temperature is 106 ℃, and the blow-up ratio is 1: 3, the traction speed is 4.1m/min, the length-diameter ratio is 1: 50.
the antioxidant is an antioxidant 1010 and an antioxidant 168, and the weight ratio is 1:1 is obtained by compounding.
The preparation method of the toughening master batch comprises the following steps:
step S11, adding broadleaf wood dissolving pulp and ferrous sulfate heptahydrate into a beaker, stirring for 8min under the condition of a rotating speed of 150r/min, then transferring into a pulping machine, adjusting the gap of the grinding disc to be 0.5mm, circularly pulping for 4 times, then transferring into the beaker, adding hydrogen peroxide, heating and reacting for 53min under the condition of a water bath at 48 ℃, then filtering, and repeatedly washing a filter cake with deionized water until a washing solution is neutral to obtain oxidized fiber nanofibrils;
step S12, adding the oxidized fiber nanofibrils obtained in the step S11 into deionized water, dispersing for 13min at an ultrasonic frequency of 72kHz to obtain oxidized fiber nanofibrils suspension, and refrigerating the oxidized fiber nanofibrils suspension at 5-8 ℃ for later use;
step S13, adding PVA particles into deionized water, reacting for 3 hours at the rotating speed of 260r/min under the condition of water bath at the temperature of 98 ℃, and then cooling to the room temperature to obtain a PVA solution;
and S14, adding the oxidized fiber nanofibril suspension, glycerol and deionized water into the PVA solution obtained in the step S13, stirring for 4min at the rotating speed of 180r/min, then adding a sulfuric acid solution with the volume fraction of 20% to adjust the pH value of the system to be 5, magnetically stirring for 1-3h at 63 ℃, then ultrasonically degassing for 30min to obtain a mixed solution, and extruding and granulating the mixed solution by using a double-screw extruder to obtain the toughening master batch.
The mass ratio of the hardwood dissolving pulp, the ferrous sulfate heptahydrate and the hydrogen peroxide in the step S11 is 220: 0.04: 0.08; the ratio of the amount of the oxidized fiber nanofibrils to the amount of the ionized water in step S12 is 1 g: 3 mL; the dosage ratio of the PVA particles to the deionized water in the step S13 is 1 g: 4mL, the volume ratio of the PVA solution, the oxidized fiber nanofibril suspension, the glycerol and the deionized water in step S14 is 1:1:0.1: 2.
The preparation method of the antibacterial agent comprises the following steps:
step S21, adding 0.1mol/L silver nitrate solution into a brown volumetric flask for later use, adding anhydrous glucose into deionized water, and stirring for 15min under the condition of the rotating speed of 160r/min to obtain a glucose solution for later use;
and S22, adding soluble starch into a beaker, adding deionized water, stirring for 4min in advance by using a glass rod, then stirring for 25min by magnetic force to obtain a transparent starch solution, dropwise adding the 0.1mol/L silver nitrate solution and the 0.1mol/L glucose solution into the starch solution in sequence in the step S21, stirring for 7min at the rotation speed of 450r/min, and then reacting for 3h at the temperature of 78 ℃ and the ultrasonic power of 260W to obtain the antibacterial agent.
In step S21, the ratio of the amount of the anhydrous glucose to the amount of the deionized water is 2 g: 4 mL; in the step S22, the dosage ratio of the soluble starch, the deionized water, the 0.1mol/L silver nitrate solution and the glucose solution is 1 g: 5mL of: 1mL of: 4 mL.
Example 4
A traditional Chinese medicine particle packaging bag comprises the following raw materials, by weight, 100 parts of low-density polyethylene, 15 parts of linear low-density polyethylene, 10 parts of propylene glycol, 4 parts of nano titanium dioxide, 5 parts of citric acid, 0.4 part of antioxidant, 2 parts of potassium sorbate, 30 parts of toughening master batch and 5 parts of antibacterial agent;
the traditional Chinese medicine granule packaging bag is prepared by the following steps:
firstly, adding low-density polyethylene, linear low-density polyethylene, propylene glycol and toughening master batch into a reaction kettle, controlling the temperature in the reaction kettle to be 190 ℃, stirring for 60min at the rotating speed of 500r/min, then adding nano titanium dioxide, citric acid, an antioxidant, potassium sorbate and an antibacterial agent, and stirring for 6h under the condition of unchanged temperature and rotating speed to obtain a mixture A;
secondly, extruding and granulating the mixture A by using a double-screw extruder to obtain a packaging bag particle raw material, wherein the extrusion temperature is divided into 4 zones, the temperature of the first zone is 110 ℃, the temperature of the second zone is 150 ℃, the temperature of the third zone is 160 ℃, and the temperature of the fourth zone is 180 ℃;
and thirdly, performing film blowing molding on the particle raw materials of the packaging bag prepared in the second step by adopting a single-screw extruder to obtain the packaging bag for the traditional Chinese medicine particles, wherein the feeding temperature during film blowing is 75 ℃, the compression plasticizing temperature is 115 ℃, and the blow-up ratio is 1: 3, the traction speed is 4.2m/min, the length-diameter ratio is 1: 50.
the antioxidant is an antioxidant 1010 and an antioxidant 168, and the weight ratio is 1:1 is obtained by compounding.
The preparation method of the toughening master batch comprises the following steps:
step S11, adding broadleaf wood dissolving pulp and ferrous sulfate heptahydrate into a beaker, stirring for 10min under the condition that the rotating speed is 100 plus 200r/min, then transferring into a pulp grinder, adjusting the gap between grinding discs to be 0.5mm, circularly grinding for 5 times, then transferring into the beaker, adding hydrogen peroxide, heating and reacting for 60min under the condition of 50 ℃ water bath, then filtering, and repeatedly washing a filter cake with deionized water until a washing liquid is neutral to obtain oxidized fiber nanofibrils;
step S12, adding the oxidized fiber nanofibrils obtained in the step S11 into deionized water, dispersing for 15min at an ultrasonic frequency of 80kHz to obtain oxidized fiber nanofibrils suspension, and refrigerating the oxidized fiber nanofibrils suspension at 8 ℃ for later use;
step S13, adding PVA particles into deionized water, reacting for 4 hours at a rotating speed of 300r/min under the condition of water bath at 100 ℃, and then cooling to room temperature to obtain a PVA solution;
and S14, adding the oxidized fiber nanofibril suspension, glycerol and deionized water into the PVA solution obtained in the step S13, stirring for 5min at the rotating speed of 300r/min, then adding a sulfuric acid solution with the volume fraction of 20% to adjust the pH value of the system to 5, magnetically stirring for 1-3h at 65 ℃, then ultrasonically degassing for 40min to obtain a mixed solution, and extruding and granulating the mixed solution by using a double-screw extruder to obtain the toughening master batch.
The mass ratio of the broadleaf wood dissolving pulp, the ferrous sulfate heptahydrate and the hydrogen peroxide in the step S11 is 250: 0.05: 0.1; the ratio of the amount of the oxidized fiber nanofibrils to the amount of the ionized water in step S12 is 1 g: 3 mL; the dosage ratio of the PVA particles to the deionized water in the step S13 is 1 g: 4mL, the volume ratio of the PVA solution, the oxidized fiber nanofibril suspension, the glycerol and the deionized water in step S14 is 1:1:0.1: 2.
The preparation method of the antibacterial agent comprises the following steps:
step S21, adding 0.1mol/L silver nitrate solution into a brown volumetric flask for later use, adding anhydrous glucose into deionized water, and stirring for 20min under the condition of a rotation speed of 200r/min to obtain a glucose solution for later use;
and S22, adding soluble starch into a beaker, adding deionized water, stirring for 5min in advance by using a glass rod, then stirring for 30min by magnetic force to obtain a transparent starch solution, dropwise adding the 0.1mol/L silver nitrate solution and the 0.1mol/L glucose solution into the starch solution in sequence in the step S21, stirring for 10min at the rotation speed of 500r/min, and then reacting for 4h at the temperature of 80 ℃ and the ultrasonic power of 300W to obtain the antibacterial agent.
In step S21, the ratio of the amount of the anhydrous glucose to the amount of the deionized water is 2 g: 5 mL; in the step S22, the dosage ratio of the soluble starch, the deionized water, the 0.1mol/L silver nitrate solution and the glucose solution is 3 g: 10mL of: 1mL of: 4 mL.
Comparative example 1
Compared with the example 1, the toughening master batch in the example 1 is removed, and the rest of raw materials and the preparation process are unchanged.
Comparative example 2
Compared with the example 2, the antibacterial agent in the example 2 is removed, and the rest raw materials and the preparation process are unchanged.
Comparative example 3
The comparative example is a common traditional Chinese medicine granule packaging bag in the market.
The bags of examples 1 to 4 and comparative examples 1 to 3 were subjected to the following performance tests: testing the shading rate by an LH-122 type shading rate measuring instrument; testing tensile strength and elongation at break by GB/T1040; the heat seal strength is described in QB/T2358-1998 test method for heat seal strength of plastic film packaging bags; the water vapor transmission rate is shown in GB/T1037-1988 cup method for testing the water vapor permeability of plastic films and sheets; oxygen transmission, see astm d3985-1995 test method for oxygen transmission on plastic films and sheets using an electric quantity sensor; antibacterial property, QB/T2591-2003, "antibacterial Plastic antibacterial Performance test methods (Membrane-sticking methods)"; the test results are shown in the following table:
as can be seen from the above table, the results of the refractive index test, the tensile strength and the elongation at break test, the heat sealing strength, the water vapor transmission rate, the oxygen transmission rate and the antibacterial property test of the packaging bag films prepared in examples 1 to 4 are better than those of comparative examples 1 to 3, which shows that the packaging bag of the traditional Chinese medicine granule prepared by the invention has higher barrier property, antibacterial property and excellent mechanical property, and has very high application value in the field of traditional Chinese medicine packaging.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (7)
1. A traditional Chinese medicine particle packaging bag is characterized by comprising the following raw materials, by weight, 90-100 parts of low-density polyethylene, 7-15 parts of linear low-density polyethylene, 5-10 parts of propylene glycol, 1-4 parts of nano titanium dioxide, 3-5 parts of citric acid, 0.1-0.4 part of antioxidant, 1-2 parts of potassium sorbate, 20-30 parts of toughening master batch and 3-5 parts of antibacterial agent;
the traditional Chinese medicine granule packaging bag is prepared by the following steps:
firstly, adding low-density polyethylene, linear low-density polyethylene, propylene glycol and toughening master batch into a reaction kettle, controlling the temperature in the reaction kettle to be 190-;
secondly, extruding and granulating the mixture A by using a double-screw extruder to obtain a packaging bag particle raw material, wherein the extrusion temperature is divided into 4 zones, the temperature of the first zone is 110-;
and thirdly, performing film blowing molding on the particle raw materials of the packaging bag prepared in the second step by adopting a single-screw extruder to obtain the packaging bag for the traditional Chinese medicine particles, wherein the feeding temperature during film blowing is 70-75 ℃, the compression plasticizing temperature is 95-115 ℃, and the blow-up ratio is 1: 3, the traction speed is 4-4.2m/min, the length-diameter ratio is 1: 50.
2. the packaging bag of claim 1, wherein the toughening masterbatch is prepared by the following steps:
step S11, adding broadleaf wood dissolving pulp and ferrous sulfate heptahydrate into a beaker, stirring for 5-10min under the condition that the rotating speed is 100 plus 200r/min, then transferring into a pulp grinder, adjusting the gap between grinding discs to be 0.5mm, circularly grinding for 3-5 times, then transferring into the beaker, adding hydrogen peroxide, heating and reacting for 40-60min under the condition of water bath at 45-50 ℃, then filtering, and repeatedly washing a filter cake with deionized water until a washing solution is neutral to obtain oxidized fiber nanofibrils;
step S12, adding the oxidized fiber nanofibrils obtained in the step S11 into deionized water, dispersing for 10-15min at an ultrasonic frequency of 60-80kHz to obtain oxidized fiber nanofibrils suspension, and refrigerating the oxidized fiber nanofibrils suspension at 5-8 ℃ for later use;
step S13, adding PVA particles into deionized water, heating in a water bath at 95-100 ℃, reacting for 2-4h at a rotation speed of 200-;
and S14, adding the oxidized fiber nanofibril suspension, glycerol and deionized water into the PVA solution obtained in the step S13, stirring for 3-5min under the condition that the rotating speed is 150-300r/min, then adding a sulfuric acid solution with the volume fraction of 20% to adjust the pH value of the system to be 5, magnetically stirring for 1-3h at the temperature of 60-65 ℃, then ultrasonically degassing for 20-40min to obtain a mixed solution, and extruding and granulating the mixed solution by using a double-screw extruder to obtain the toughening master batch.
3. The packaging bag as claimed in claim 2, wherein the mass ratio of the hardwood dissolving pulp, ferrous sulfate heptahydrate and hydrogen peroxide in step S11 is 200-: 0.03-0.05: 0.08-0.1; the ratio of the amount of the oxidized fiber nanofibrils to the amount of the ionized water in step S12 is 1 g: 1-3 mL; the dosage ratio of the PVA particles to the deionized water in the step S13 is 1 g: 2-4mL, and the volume ratio of the PVA solution, the oxidized fiber nanofibril suspension, the glycerol and the deionized water in the step S14 is 1:1:0.05-0.1: 1-2.
4. The packaging bag of claim 1, wherein the preparation method of the antibacterial agent comprises the following steps:
step S21, adding 0.1mol/L silver nitrate solution into a brown volumetric flask for later use, adding anhydrous glucose into deionized water, and stirring for 10-20min under the condition of the rotation speed of 100 and 200r/min to obtain a glucose solution for later use;
step S22, adding soluble starch into a beaker, adding deionized water, stirring for 3-5min in advance by using a glass rod, then stirring for 20-30min by magnetic force to obtain a transparent starch solution, dropwise adding 0.1mol/L silver nitrate solution and 0.1mol/L glucose solution into the starch solution in sequence in step S21, stirring for 5-10min under the condition of the rotation speed of 300-80 ℃ and the ultrasonic power of 250-300W, and then reacting for 3-4h to obtain the antibacterial agent.
5. The packaging bag of claim 4, wherein the ratio of the anhydrous glucose to the deionized water in step S21 is 2 g: 4-5 mL; in the step S22, the dosage ratio of the soluble starch, the deionized water, the silver nitrate solution of 0.1mol/L and the glucose solution is 1-3 g: 5-10 mL: 1mL of: 4 mL.
6. The packaging bag of claim 1, wherein the antioxidant is antioxidant 1010 and antioxidant 168 in a weight ratio of 1:1 is obtained by compounding.
7. The method for preparing a packaging bag for traditional Chinese medicine granules according to claim 1, which comprises the following steps:
firstly, adding low-density polyethylene, linear low-density polyethylene, propylene glycol and toughening master batch into a reaction kettle, controlling the temperature in the reaction kettle to be 190-;
secondly, extruding and granulating the mixture A by using a double-screw extruder to obtain a packaging bag particle raw material, wherein the extrusion temperature is divided into 4 zones, the temperature of the first zone is 110-;
and thirdly, performing film blowing molding on the particle raw materials of the packaging bag prepared in the second step by adopting a single-screw extruder to obtain the packaging bag for the traditional Chinese medicine particles, wherein the feeding temperature during film blowing is 70-75 ℃, the compression plasticizing temperature is 95-115 ℃, and the blow-up ratio is 1: 3, the traction speed is 4-4.2m/min, the length-diameter ratio is 1: 50.
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