CN111154147A - Environment-friendly degradable buffer packaging material and preparation method thereof - Google Patents

Environment-friendly degradable buffer packaging material and preparation method thereof Download PDF

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CN111154147A
CN111154147A CN202010043934.9A CN202010043934A CN111154147A CN 111154147 A CN111154147 A CN 111154147A CN 202010043934 A CN202010043934 A CN 202010043934A CN 111154147 A CN111154147 A CN 111154147A
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foaming agent
packaging material
mixture
environment
stirring
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张金水
张平
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    • C08J2203/22—Expandable microspheres, e.g. Expancel®
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    • C08J2303/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
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Abstract

The invention relates to the technical field of environment-friendly packaging materials, in particular to an environment-friendly degradable buffer packaging material and a preparation method thereof. An environment-friendly degradable buffering packaging material comprises the following raw materials in parts by weight: 1-6 parts of composite foaming agent, 40-70 parts of plant fiber powder, 50-80 parts of edible starch, 30-50 parts of wheat flour, 40-70 parts of vegetable oil, 0.5-5 parts of emulsifier and 150-250 parts of deionized water A. The degradable buffer packaging material has no pollution in the production and use processes, is extremely easy to degrade, is green and environment-friendly, has adjustable elasticity and good buffer performance, can effectively protect products in the package, is simple and efficient in the adopted preparation method, convenient to operate and control, high in quality of the produced products, beneficial to industrial production, free of three wastes in the production process, and green and environment-friendly.

Description

Environment-friendly degradable buffer packaging material and preparation method thereof
Technical Field
The invention relates to the technical field of environment-friendly packaging materials, in particular to an environment-friendly degradable buffer packaging material and a preparation method thereof.
Background
The main function of the foam plastic is to fix the product in the carton, so that the product is prevented from shaking in the transportation process, and the foam plastic has good elasticity, so that a certain buffering effect can be achieved, and the product is prevented from being damaged and destroyed due to collision. In the production process, the density and the elasticity of the foam plastic can be regulated and controlled by controlling the process parameters such as the material distributing time and the like, so that the foam plastic is suitable for products with different weights, and has strong adaptability, and therefore, the foam plastic is widely applied to product packaging. However, the foam plastic as a disposable material has extremely poor degradability, is extremely difficult to degrade when being discarded in the environment, and brings great burden to the environment; while the incineration treatment can generate toxic gas, which causes great pollution to the environment, which is called as white pollution. Therefore, a substitute product of the foam plastic is to be developed, which not only has good buffering performance and controllability, but also is green and environment-friendly.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the environment-friendly degradable buffer packaging material which is pollution-free in the production and use processes, extremely easy to degrade, green and environment-friendly, has adjustable elasticity and good buffer performance and can effectively protect products inside the package.
The invention also aims to provide a preparation method of the environment-friendly degradable buffer packaging material, which is simple and efficient, convenient to operate and control, high in quality of produced products, beneficial to industrial production, free of three wastes in the production process and environment-friendly.
The purpose of the invention is realized by the following technical scheme: an environment-friendly degradable buffering packaging material comprises the following raw materials in parts by weight:
Figure BDA0002368703980000011
Figure BDA0002368703980000021
the particle size of the plant fiber powder is 160-200 meshes.
The degradable buffer packaging material prepared by the invention has no pollution in the production and use processes, is extremely easy to degrade, is green and environment-friendly, has adjustable elasticity and good buffer performance, and can effectively protect products in the package. The adopted plant fiber powder plays a role in toughening and reinforcing, is beneficial to the decomposition of the material in water, and has good degradability; the edible starch has a bonding effect, the wheat flour has a pasting effect, and the vegetable oil has an elasticity increasing effect; the emulsifier is beneficial to better emulsifying and dispersing the starch, the composite foaming agent plays a foaming role, and pores can be formed in the material, so that the material has elasticity; by the formula, the obtained degradable buffer packaging material has good and adjustable elasticity, can play a good buffer effect, is extremely easy to degrade, and is green and environment-friendly.
Preferably, the composite foaming agent comprises the following raw materials in parts by weight:
Figure BDA0002368703980000022
the first component foaming agent is a mixture consisting of an AC foaming agent, a sodium bicarbonate foaming agent and an AD foaming agent according to the weight ratio of 0.4-0.8:0.6-1.0: 0.8-1.2; the second component foaming agent is supercritical CO2And/or N2(ii) a The third component foaming agent is a microsphere foaming agent produced by Beijing Sengtai and science and technology Limited liability company or a Korean DongDongJIN microsphere foaming agent.
The composite foaming agent is prepared by the following method:
s1, adding the first component foaming agent and the third component foaming agent into deionized water B according to parts by weight, mixing and stirring, adding paraffin and cerium dioxide, heating to 60-80 ℃, and stirring at 400r/min for 40-60min to obtain a mixture A for later use;
s2, adding the second group of foaming agents into the mixture A obtained in the step S2, uniformly stirring, finally adding the polymethyl silicon phosphate, and stirring at the speed of 300-600r/min for 15-30min to obtain the composite foaming agent.
The composite foaming agent adopted in the invention has good thermal stability, can reduce the decomposition temperature during foaming, is beneficial to full plastication under the low-temperature condition, can be stably and quickly decomposed to form foam holes in the calendering process, has stable foam hole structure, and obviously improves the collapse condition; the AC foaming agent adopted in the method can enable the prepared packaging material to obtain a uniform and fine cellular structure, and the product has comfortable hand feeling and good rebound resilience. In the process of preparing the composite foaming agent, the stirring speed in the step S2 needs to be controlled to be 300-600r/min, if the speed is too high, the foam homogenizing effect of the polymethyl silicon phosphate is relatively reduced, and if the stirring speed is too low, the mutual dissolving effect between the mixture a and the second group of foam distributing agent and the polymethyl silicon phosphate is poor, so that the composite foaming efficiency of the prepared composite foaming agent is affected, the stability of the cell structure is affected, and the elasticity and the buffer performance of the finally prepared packaging material are not facilitated.
Preferably, each part of the emulsifier is at least one of dihydroxypropyl octadecanoate, polyglycerol polyricinoleate and span-80; more preferably, the emulsifier is a mixture of dihydroxypropyl octadecanoate, polyglycerol polyricinoleate and span-80 according to the weight ratio of 0.8-1.2:0.6-1.0: 0.4-0.8. Each part of the aqueous adhesive is at least one of polyurethane aqueous adhesive, acrylic aqueous adhesive and polyvinyl alcohol aqueous adhesive; more preferably, the aqueous adhesive is a mixture of polyurethane aqueous adhesive, acrylic aqueous adhesive and polyvinyl alcohol aqueous adhesive according to the weight ratio of 0.6-1.0:0.8-1.2: 0.4-0.8.
The dihydroxypropyl octadecanoic acid ester in the emulsifier has hydrophilic and lipophilic groups, has multiple functions of wetting, emulsifying, foaming and the like, and the span-80 is easily dissolved in hot oil and an organic solvent, is a high-grade lipophilic emulsifier, and can be used for synergistically promoting the emulsifier to play a good emulsifying role in the process of preparing the packaging material with the dihydroxypropyl octadecanoic acid ester and the polyglycerol polyricinoleate. The polyurethane aqueous adhesive adopted by the aqueous adhesive has the advantages of adjustable hardness, low temperature resistance, good flexibility, high bonding strength and the like; the polyvinyl alcohol aqueous adhesive is produced by Shanghai West chemical engineering science and technology limited, mainly reacts with hydrophilic groups (amino groups, carboxyl groups and hydroxyl groups) of aqueous resin, and the original linear structure of the aqueous resin is modified to form a high-strength net-shaped structure, so that the performances of the polyvinyl alcohol aqueous adhesive such as bonding strength, high temperature resistance, corrosion resistance, water resistance, adhesive force, surface hardness, hand feeling and the like can be obviously improved.
The invention also provides a preparation method of the environment-friendly degradable buffer packaging material, which comprises the following steps:
1) mixing and stirring plant fiber powder, a water-based adhesive and plant oil uniformly according to parts by weight, putting the mixture into a drying device, heating the mixture to the temperature of 100 ℃ and 160 ℃, baking the mixture for 20-60min, and cooling the mixture to obtain a mixture A for later use;
2) mixing and stirring edible starch and wheat flour uniformly, adding an emulsifier and a composite foaming agent, and continuously stirring uniformly to obtain a mixture B for later use;
3) uniformly mixing and stirring the mixture A obtained in the step 1) and the mixture B obtained in the step 2), adding deionized water A into the mixture, stirring the mixture uniformly, pouring the mixture into a mold, placing the mold into an oven, heating the mold to 110-; the packaging material has sponge-like pores therein, and has a specific gravity of 0.2-0.32g/cm3。
The degradable buffer packaging material prepared by the method has good and adjustable elasticity, can play a good buffer effect, is extremely easy to degrade, and is green and environment-friendly. In the preparation process, the heating temperature in the step 1) needs to be strictly controlled to be 100-160 ℃, if the temperature is too high, the plant fiber powder can be carbonized, and if the temperature is too low, the mixing of the plant fiber powder, the water-based adhesive and the plant oil is not facilitated; in the step 3), the foaming and shaping time needs to be strictly controlled for 0.5-3h, if the time is too long, the aging and thermal aging phenomena of the prepared degradable buffer packaging material under the irradiation of ultraviolet light can be remarkably accelerated, and if the time is too short, the pores formed by insufficient foaming can be not uniform, so that the elasticity and the buffer effect of the finally prepared degradable buffer packaging material are not facilitated; the spongy air holes are formed in the packaging material, so that the resilience performance of the packaging material can be obviously improved, the weight of the packaging material is reduced, and the packaging material is more favorable for transportation and packaging.
The invention has the beneficial effects that: the degradable buffer packaging material is pollution-free in the production and use processes, is extremely easy to degrade, is green and environment-friendly, and meanwhile, the elasticity and the buffering performance of the sponge pores in the degradable buffer packaging material can be obviously improved through the sponge pores in the degradable buffer packaging material, so that the product in the package can be effectively protected; the composite foaming agent adopted by the method is good in thermal stability, can reduce the decomposition temperature during foaming, is beneficial to sufficient plastication under the low-temperature condition, can be stably and quickly decomposed to form foam holes in the calendering process, is stable in structure, is remarkably improved in collapse condition, and can remarkably improve the elasticity and the buffering performance of the finally prepared degradable buffering packaging material.
The preparation method of the environment-friendly degradable buffer packaging material is simple and efficient, convenient to operate and control, high in quality of produced products, beneficial to industrial production, free of three wastes in the production process, and green and environment-friendly.
Drawings
Fig. 1-3 show the degradable buffering packaging material prepared by the invention.
Detailed Description
For the understanding of those skilled in the art, the present invention will be further described with reference to the following examples and accompanying fig. 1-3, which are not intended to limit the present invention.
Example 1
An environment-friendly degradable buffering packaging material comprises the following raw materials in parts by weight:
Figure BDA0002368703980000051
Figure BDA0002368703980000061
the particle size of the plant fiber powder is 160 meshes.
The composite foaming agent comprises the following raw materials in parts by weight:
Figure BDA0002368703980000062
the first component foaming agent is a mixture consisting of an AC foaming agent, a sodium bicarbonate foaming agent and an AD foaming agent according to the weight ratio of 0.4:0.6: 0.8; the second component foaming agent is supercritical CO2(ii) a The third component foaming agent is a microsphere foaming agent produced by Beijing Sengtai and science and technology Limited liability company.
The composite foaming agent is prepared by the following method:
s1, adding the first component foaming agent and the third component foaming agent into deionized water B according to parts by weight, mixing and stirring, adding paraffin and cerium dioxide, heating to 60 ℃, and stirring at 200r/min for 40min to obtain a mixture A for later use;
s2, adding the second group of foaming agents into the mixture A obtained in the step S2, uniformly stirring, finally adding the polymethyl silicon phosphate, and stirring at the speed of 300r/min for 15min to obtain the composite foaming agent.
Each part of the emulsifier is a mixture of dihydroxypropyl octadecanoate, polyglycerol polyricinoleate and span-80 according to the weight ratio of 0.8:0.6: 0.4.
A preparation method of an environment-friendly degradable buffer packaging material comprises the following steps:
1) mixing and stirring plant fiber powder and plant oil uniformly according to parts by weight, putting the mixture into a drying device, heating the mixture to 100 ℃, baking the mixture for 20min, and cooling the mixture to obtain a mixture A for later use;
2) mixing and stirring edible starch and wheat flour uniformly, adding an emulsifier and a composite foaming agent, and continuously stirring uniformly to obtain a mixture B for later use;
3) mixing and stirring the mixture A obtained in the step 1) and the mixture B obtained in the step 2) uniformly, adding deionized water A, stirring uniformly, pouring into a mold, placing the mold into an oven, heating to 110 ℃, foaming and shaping for 0.5h, and demolding to obtain the packaging material; the packaging material has sponge-like pores therein and specific gravity of 0.2g/cm3。
Example 2
An environment-friendly degradable buffering packaging material comprises the following raw materials in parts by weight:
Figure BDA0002368703980000071
the particle size of the plant fiber powder is 170 meshes.
The composite foaming agent comprises the following raw materials in parts by weight:
Figure BDA0002368703980000072
Figure BDA0002368703980000081
the first component foaming agent is a mixture consisting of an AC foaming agent, a sodium bicarbonate foaming agent and an AD foaming agent according to the weight ratio of 0.5:0.7: 0.9; the second group of foaming agents is supercritical N2(ii) a The third component is a Korean dong jin foamerDONGJIN microsphere foaming agent.
The composite foaming agent is prepared by the following method:
s1, adding the first component foaming agent and the third component foaming agent into deionized water B according to parts by weight, mixing and stirring, adding paraffin and cerium dioxide, heating to 65 ℃, and stirring at 250r/min for 45min to obtain a mixture A for later use;
s2, adding the second group of foaming agents into the mixture A obtained in the step S2, uniformly stirring, finally adding the polymethyl silicon phosphate, and stirring at the speed of 375r/min for 18min to obtain the composite foaming agent.
Each part of the emulsifier is a mixture of dihydroxypropyl octadecanoate, polyglycerol polyricinoleate and span-80 according to the weight ratio of 0.9:0.7: 0.5.
Each part of the aqueous adhesive is a mixture consisting of YF-2351-enriched polyurethane aqueous adhesive, ByK024 acrylic acid aqueous adhesive and polyvinyl alcohol PVA2699 aqueous adhesive according to the weight ratio of 0.7:0.9: 0.5; the polyvinyl alcohol aqueous adhesive is produced by Shanghai West chemical engineering science and technology limited.
A preparation method of an environment-friendly degradable buffer packaging material comprises the following steps:
1) mixing and stirring plant fiber powder, a water-based adhesive and plant oil uniformly according to parts by weight, putting the mixture into a drying device, heating the mixture to 115 ℃, baking the mixture for 30min, and cooling the mixture to obtain a mixture A for later use;
2) mixing and stirring edible starch and wheat flour uniformly, adding an emulsifier and a composite foaming agent, and continuously stirring uniformly to obtain a mixture B for later use;
3) mixing and stirring the mixture A obtained in the step 1) and the mixture B obtained in the step 2) uniformly, adding deionized water A, stirring uniformly, pouring into a mold, placing the mold into an oven, heating to 127 ℃, foaming and shaping for 1.15h, and demolding to obtain the packaging material; the packaging material has sponge-like pores therein, and has a specific gravity of 0.203g/cm3。
Example 3
An environment-friendly degradable buffering packaging material comprises the following raw materials in parts by weight:
Figure BDA0002368703980000091
the particle size of the plant fiber powder is 180 meshes.
The composite foaming agent comprises the following raw materials in parts by weight:
Figure BDA0002368703980000092
the first component foaming agent is a mixture of an AC foaming agent, a sodium bicarbonate foaming agent and an AD foaming agent according to the weight ratio of 0.6:0.8: 1.0; the second component foaming agent is supercritical CO2And N2A mixture according to the volume ratio of 0.6: 0.8; the third component foaming agent is a korean dongdin DONGJIN microsphere foaming agent.
The composite foaming agent is prepared by the following method:
s1, adding the first component foaming agent and the third component foaming agent into deionized water B according to parts by weight, mixing and stirring, adding paraffin and cerium dioxide, heating to 70 ℃, and stirring for 50min at the speed of 300r/min to obtain a mixture A for later use;
s2, adding the second group of foaming agents into the mixture A obtained in the step S2, uniformly stirring, finally adding the polymethyl silicon phosphate, and stirring at the speed of 450r/min for 22min to obtain the composite foaming agent.
Each part of the emulsifier is a mixture consisting of dihydroxypropyl octadecanoate, polyglycerol polyricinoleate and span-80 according to the weight ratio of 1.0:0.8: 0.6.
Each part of the aqueous adhesive is a mixture consisting of YF-2351-enriched polyurethane aqueous adhesive, ByK024 acrylic acid aqueous adhesive and polyvinyl alcohol PVA2699 aqueous adhesive according to the weight ratio of 0.8:1.0: 0.6; the polyvinyl alcohol aqueous adhesive is produced by Shanghai West chemical engineering science and technology limited.
A preparation method of an environment-friendly degradable buffer packaging material comprises the following steps:
1) mixing and stirring plant fiber powder, a water-based adhesive and plant oil uniformly according to parts by weight, putting the mixture into a drying device, heating the mixture to 130 ℃, baking the mixture for 40min, and cooling the mixture to obtain a mixture A for later use;
2) mixing and stirring edible starch and wheat flour uniformly, adding an emulsifier and a composite foaming agent, and continuously stirring uniformly to obtain a mixture B for later use;
3) mixing and stirring the mixture A obtained in the step 1) and the mixture B obtained in the step 2) uniformly, adding deionized water A, stirring uniformly, pouring into a mold, placing the mold into an oven, heating to 145 ℃, foaming and shaping for 1.75h, and demolding to obtain the packaging material; the packaging material has sponge-like pores therein, and has a specific gravity of 0.206g/cm3。
Example 4
An environment-friendly degradable buffering packaging material comprises the following raw materials in parts by weight:
Figure BDA0002368703980000111
the particle size of the plant fiber powder is 190 meshes.
The composite foaming agent comprises the following raw materials in parts by weight:
Figure BDA0002368703980000112
the first component foaming agent is a mixture consisting of an AC foaming agent, a sodium bicarbonate foaming agent and an AD foaming agent according to the weight ratio of 0.7:0.9: 1.1; the second component foaming agent is supercritical CO2(ii) a The third component foaming agent is a microsphere foaming agent produced by Beijing Sengtai and science and technology Limited liability company.
The composite foaming agent is prepared by the following method:
s1, adding the first component foaming agent and the third component foaming agent into deionized water B according to parts by weight, mixing and stirring, adding paraffin and cerium dioxide, heating to 75 ℃, and stirring at 350r/min for 55min to obtain a mixture A for later use;
s2, adding the second group of foaming agents into the mixture A obtained in the step S2, uniformly stirring, finally adding the polymethyl silicon phosphate, and stirring at the speed of 525r/min for 24min to obtain the composite foaming agent.
Each part of the emulsifier is a mixture consisting of dihydroxypropyl octadecanoate, polyglycerol polyricinoleate and span-80 according to the weight ratio of 1.1:0.9: 0.7.
Each part of the aqueous adhesive is a mixture consisting of YF-2351-enriched polyurethane aqueous adhesive, ByK024 acrylic acid aqueous adhesive and polyvinyl alcohol PVA2699 aqueous adhesive according to the weight ratio of 0.9:1.1: 0.7; the polyvinyl alcohol aqueous adhesive is produced by Shanghai West chemical engineering science and technology limited.
A preparation method of an environment-friendly degradable buffer packaging material comprises the following steps:
1) mixing and stirring plant fiber powder, a water-based adhesive and plant oil uniformly according to parts by weight, putting the mixture into a drying device, heating the mixture to 145 ℃, baking the mixture for 50min, and cooling the mixture to obtain a mixture A for later use;
2) mixing and stirring edible starch and wheat flour uniformly, adding an emulsifier and a composite foaming agent, and continuously stirring uniformly to obtain a mixture B for later use;
3) mixing and stirring the mixture A obtained in the step 1) and the mixture B obtained in the step 2) uniformly, adding deionized water A, stirring uniformly, pouring into a mold, placing the mold into an oven, heating to 163 ℃ for foaming and shaping for 2.35 hours, and demolding to obtain the packaging material; the packaging material has sponge-like pores therein, and has a specific gravity of 0.209g/cm3。
Example 5
An environment-friendly degradable buffering packaging material comprises the following raw materials in parts by weight:
Figure BDA0002368703980000121
Figure BDA0002368703980000131
the particle size of the plant fiber powder is 200 meshes.
The composite foaming agent comprises the following raw materials in parts by weight:
Figure BDA0002368703980000132
the first component foaming agent is a mixture consisting of an AC foaming agent, a sodium bicarbonate foaming agent and an AD foaming agent according to the weight ratio of 0.8:1.0: 1.2; the second group of foaming agents is supercritical N2(ii) a The third component foaming agent is a korean dongdin DONGJIN microsphere foaming agent.
The composite foaming agent is prepared by the following method:
s1, adding the first component foaming agent and the third component foaming agent into deionized water B according to parts by weight, mixing and stirring, adding paraffin and cerium dioxide, heating to 80 ℃, and stirring at 400r/min for 60min to obtain a mixture A for later use;
s2, adding the second group of foaming agents into the mixture A obtained in the step S2, uniformly stirring, finally adding the polymethyl silicon phosphate, and stirring at the speed of 600r/min for 30min to obtain the composite foaming agent.
Each part of the emulsifier is a mixture consisting of dihydroxypropyl octadecanoate, polyglycerol polyricinoleate and span-80 according to the weight ratio of 1.2:1.0: 0.8.
Each part of the aqueous adhesive is a mixture consisting of YF-2351-enriched polyurethane aqueous adhesive, ByK024 acrylic acid aqueous adhesive and polyvinyl alcohol PVA2699 aqueous adhesive according to the weight ratio of 1.0:1.2: 0.8; the polyvinyl alcohol aqueous adhesive is produced by Shanghai West chemical engineering science and technology limited.
A preparation method of an environment-friendly degradable buffer packaging material comprises the following steps:
1) mixing and stirring plant fiber powder, a water-based adhesive and plant oil uniformly according to parts by weight, putting the mixture into a drying device, heating the mixture to 160 ℃, baking the mixture for 60min, and cooling the mixture to obtain a mixture A for later use;
2) mixing and stirring edible starch and wheat flour uniformly, adding an emulsifier and a composite foaming agent, and continuously stirring uniformly to obtain a mixture B for later use;
3) mixing and stirring the mixture A obtained in the step 1) and the mixture B obtained in the step 2) uniformly, adding deionized water A, stirring uniformly, pouring into a mold, placing the mold into an oven, heating to 180 ℃, foaming and shaping for 3 hours, and demolding to obtain the packaging material; the packaging material has sponge-like pores therein, and has a specific gravity of 0.32g/cm3。
Comparative example 1
An environment-friendly degradable buffering packaging material comprises the following raw materials in parts by weight:
Figure BDA0002368703980000141
the particle size of the plant fiber powder is 160 meshes.
The composite foaming agent comprises the following raw materials in parts by weight:
Figure BDA0002368703980000142
Figure BDA0002368703980000151
the first component foaming agent is a mixture consisting of an AC foaming agent, a sodium bicarbonate foaming agent and an AD foaming agent according to the weight ratio of 0.4:0.6: 0.8; the second component foaming agent is supercritical CO2(ii) a The third component foaming agent is a microsphere foaming agent produced by Beijing Sengtai and science and technology Limited liability company.
The composite foaming agent is prepared by the following method:
s1, adding the first component foaming agent and the third component foaming agent into deionized water B according to parts by weight, mixing and stirring, adding paraffin and cerium dioxide, heating to 60 ℃, and stirring at 200r/min for 40min to obtain a mixture A for later use;
s2, adding the second group of foaming agents into the mixture A obtained in the step S2, uniformly stirring, finally adding the polymethyl silicon phosphate, and stirring at the speed of 300r/min for 15min to obtain the composite foaming agent.
Each part of the emulsifier is a mixture of dihydroxypropyl octadecanoate, polyglycerol polyricinoleate and span-80 according to the weight ratio of 0.8:0.6: 0.4.
A preparation method of an environment-friendly degradable buffer packaging material comprises the following steps:
1) mixing and stirring plant fiber powder and plant oil uniformly according to parts by weight, putting the mixture into a drying device, heating the mixture to 100 ℃, baking the mixture for 20min, and cooling the mixture to obtain a mixture A for later use;
2) mixing and stirring the edible starch and the corn flour uniformly, adding the emulsifier and the composite foaming agent, and continuously stirring until the mixture is uniform to obtain a mixture B for later use;
3) mixing and stirring the mixture A obtained in the step 1) and the mixture B obtained in the step 2) uniformly, adding deionized water A, stirring uniformly, pouring into a mold, placing the mold into an oven, heating to 110 ℃, foaming and shaping for 0.5h, and demolding to obtain the product
Comparative example 2
An environment-friendly degradable buffering packaging material comprises the following raw materials in parts by weight:
Figure BDA0002368703980000161
the particle size of the plant fiber powder is 180 meshes.
The foaming agent is a mixture consisting of an AC foaming agent, a sodium bicarbonate foaming agent and an AD foaming agent according to the weight ratio of 0.6:0.8: 1.0.
Each part of the emulsifier is a mixture consisting of dihydroxypropyl octadecanoate, polyglycerol polyricinoleate and span-80 according to the weight ratio of 1.0:0.8: 0.6.
Each part of the aqueous adhesive is a mixture consisting of YF-2351-enriched polyurethane aqueous adhesive, ByK024 acrylic acid aqueous adhesive and polyvinyl alcohol PVA2699 aqueous adhesive according to the weight ratio of 0.8:1.0: 0.6; the polyvinyl alcohol aqueous adhesive is produced by Shanghai West chemical engineering science and technology limited.
A preparation method of an environment-friendly degradable buffer packaging material comprises the following steps:
1) mixing and stirring plant fiber powder, a water-based adhesive and plant oil uniformly according to parts by weight, putting the mixture into a drying device, heating the mixture to 130 ℃, baking the mixture for 40min, and cooling the mixture to obtain a mixture A for later use;
2) mixing and stirring edible starch and wheat flour uniformly, adding an emulsifier and a foaming agent, and continuously stirring uniformly to obtain a mixture B for later use;
3) mixing and stirring the mixture A obtained in the step 1) and the mixture B obtained in the step 2) uniformly, adding deionized water A, stirring uniformly, pouring into a mold, placing the mold into an oven, heating to 145 ℃, foaming and shaping for 1.75h, and demolding to obtain the packaging material; the packaging material has sponge-like pores therein, and has a specific gravity of 0.206g/cm3。
Comparative example 3
An environment-friendly degradable buffering packaging material comprises the following raw materials in parts by weight:
Figure BDA0002368703980000171
the particle size of the plant fiber powder is 200 meshes.
The composite foaming agent comprises the following raw materials in parts by weight:
Figure BDA0002368703980000172
the first component foaming agent is a mixture consisting of an AC foaming agent, a sodium bicarbonate foaming agent and an AD foaming agent according to the weight ratio of 0.8:1.0: 1.2; the second group of foaming agents is supercritical N2(ii) a The third component foaming agent is a korean dongdin DONGJIN microsphere foaming agent.
The composite foaming agent is prepared by the following method:
s1, adding the first component foaming agent and the third component foaming agent into deionized water B according to parts by weight, mixing and stirring, adding paraffin and cerium dioxide, heating to 80 ℃, and stirring at 400r/min for 60min to obtain a mixture A for later use;
s2, adding the second group of foaming agents into the mixture A obtained in the step S2, uniformly stirring, finally adding the polymethyl silicon phosphate, and stirring at the speed of 600r/min for 30min to obtain the composite foaming agent.
Each part of the emulsifier is dihydroxypropyl octadecanoic acid ester.
Each part of the aqueous adhesive is a mixture consisting of YF-2351-enriched polyurethane aqueous adhesive, ByK024 acrylic acid aqueous adhesive and polyvinyl alcohol PVA2699 aqueous adhesive according to the weight ratio of 1.0:1.2: 0.8; the polyvinyl alcohol aqueous adhesive is produced by Shanghai West chemical engineering science and technology limited.
A preparation method of an environment-friendly degradable buffer packaging material comprises the following steps:
1) mixing and stirring plant fiber powder, a water-based adhesive and plant oil uniformly according to parts by weight, putting the mixture into a drying device, heating the mixture to 160 ℃, baking the mixture for 60min, and cooling the mixture to obtain a mixture A for later use;
2) mixing and stirring edible starch and wheat flour uniformly, adding an emulsifier and a composite foaming agent, and continuously stirring uniformly to obtain a mixture B for later use;
3) mixing and stirring the mixture A obtained in the step 1) and the mixture B obtained in the step 2) uniformly, adding deionized water A, stirring uniformly, pouring into a mold, placing the mold into an oven, heating to 180 ℃, foaming and shaping for 3 hours, and demolding to obtain the packaging material; the packaging material has sponge-like pores therein, and has a specific gravity of 0.32g/cm3。
The samples prepared in examples 1 to 5 and comparative examples 1 to 3 were subjected to the apparent density, rebound resilience, degradation rate and mildew resistance rating performance tests. Wherein the apparent density test is referred to GB/T6343-1995; and (3) testing the resilience performance: loading the sample along the thickness direction at the speed of 12 +/-3 mm/min, keeping the pressure for 3min when the strain is 50%, unloading, measuring the thickness of the sample after the sample is placed for 10s, and calculating the rebound rate; degradation rate: soaking the sample in water, and observing degradation days; the mildew-proof grade test refers to GB/T1741-2007. The results are shown in table 1:
TABLE 1
Item Apparent density (g/cm3) Rebound resilience (%) Degradation Rate (Tian) Mildew resistance rating
Example 1 20.4 89.2 2 First stage
Example 2 20.2 85.0 15 First stage
Example 3 20.1 85.2 15 First stage
Example 4 20.3 855 15 First stage
Example 5 20.2 85.4 15 First stage
Comparative example 1 24.2 80.4 3 First stage
Comparative example 2 36.5 74.8 18 Second stage
Comparative example 3 26.3 77.6 17 Second stage
As can be seen from the above table, the degradable cushioning packaging materials prepared in embodiments 1 to 5 of the present invention have the characteristics of small apparent density, high rebound rate, high degradation rate and high mildew-proof grade, and in addition, have the advantages of long service life and low production cost.
Compared with the example 1, in the comparative example 1, corn flour is used for replacing wheat flour in the raw materials selected in the preparation of the degradable buffering packaging material, various physical property tests are carried out on the degradable buffering packaging material prepared from the raw materials, and analysis shows that the apparent density of the degradable buffering packaging material is relatively increased, and the rebound rate, the degradation rate and the mildew-proof grade are relatively reduced; the invention shows that the degradable buffer packaging material prepared by adding wheat flour into the raw materials of the degradable buffer packaging material has the characteristics of small apparent density, high rebound rate, high degradation rate and high mildew-proof grade, and in addition, the degradable buffer packaging material has the advantages of long service life and low production cost.
Compared with the embodiment 3, in the comparative example 2, the mixed foaming agent consisting of the AC foaming agent, the sodium bicarbonate foaming agent and the AD foaming agent in the weight ratio of 0.6:0.8:1.0 is used for replacing the composite foaming agent in the raw materials selected during the preparation of the degradable buffer packaging material, and various physical property tests are carried out on the degradable buffer packaging material prepared from the raw materials, so that the analysis shows that the apparent density of the degradable buffer packaging material is remarkably increased, and the rebound rate, the degradation rate and the mildew-proof grade are relatively reduced; the invention shows that the composite foaming agent is added into the raw materials of the degradable buffering packaging material, so that the prepared degradable buffering packaging material has the characteristics of small apparent density, high rebound rate, high degradation rate and high mildew-proof grade, and in addition, the degradable buffering packaging material has the advantages of long service life and low production cost.
Compared with the embodiment 5, in the comparative example 3, the dihydroxypropyl octadecanoate is used for replacing the mixed emulsifier consisting of the dihydroxypropyl octadecanoate, the polyglycerol polyricinoleate and the span-80 according to the weight ratio of 1.2:1.0:0.8 in the raw materials selected during the preparation of the degradable buffer packaging material, the degradable buffer packaging material prepared from the raw materials is subjected to various physical property tests, and analysis shows that the apparent density of the degradable buffer packaging material is relatively increased, and the rebound rate, the degradation rate and the mildew-proof grade are relatively reduced; the invention shows that the mixed emulsifier which is composed of dihydroxypropyl octadecanoic acid ester, polyglycerol polyricinoleate and span-80 according to the weight ratio of 1.2:1.0:0.8 is added into the raw materials of the degradable buffer packaging material, so that the prepared degradable buffer packaging material has the characteristics of small apparent density, high rebound rate, high degradation rate and high mildew-proof grade, and in addition, the degradable buffer packaging material has the advantages of long service life and low production cost.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.

Claims (10)

1. An environment-friendly degradable buffering packaging material is characterized in that: the feed comprises the following raw materials in parts by weight:
Figure FDA0002368703970000011
2. the environment-friendly degradable buffering packaging material as claimed in claim 1, wherein: each part of the composite foaming agent comprises the following raw materials in parts by weight:
Figure FDA0002368703970000012
the first component foaming agent is a mixture consisting of an AC foaming agent, a sodium bicarbonate foaming agent and an AD foaming agent according to the weight ratio of 0.4-0.8:0.6-1.0: 0.8-1.2; the second component foaming agent is supercritical CO2And/or N2(ii) a The third component foaming agent is a microsphere foaming agent.
3. The environment-friendly degradable buffering packaging material as claimed in claim 2, wherein: the composite foaming agent is prepared by the following method:
s1, adding the first component foaming agent and the third component foaming agent into deionized water B according to parts by weight, mixing and stirring, adding paraffin and cerium dioxide, heating to 60-80 ℃, and stirring at 400r/min for 40-60min to obtain a mixture A for later use;
s2, adding the second group of foaming agents into the mixture A obtained in the step S2, uniformly stirring, finally adding the polymethyl silicon phosphate, and stirring at the speed of 300-600r/min for 15-30min to obtain the composite foaming agent.
4. The environment-friendly degradable buffering packaging material as claimed in claim 1, wherein: each part of the emulsifier is at least one of dihydroxypropyl stearate, polyglycerol polyricinoleate and span-80.
5. The environment-friendly degradable buffering packaging material as claimed in claim 1, wherein: the particle size of the plant fiber powder is 160-200 meshes.
6. The environment-friendly degradable buffering packaging material as claimed in claim 1, wherein: the adhesive also comprises a water-based adhesive, and the weight part of the water-based adhesive is not more than 80 parts.
7. The environment-friendly degradable buffering packaging material as claimed in claim 6, wherein: each part of the aqueous adhesive is at least one of polyurethane aqueous adhesive, acrylic aqueous adhesive and polyvinyl alcohol aqueous adhesive.
8. The environment-friendly degradable buffering packaging material as claimed in claim 1, wherein: the packaging material has sponge-like pores therein, and has a specific gravity of 0.2-0.32g/cm3。
9. The method for preparing the environment-friendly degradable buffering packaging material according to any one of claims 6 to 8, characterized in that: the method comprises the following steps:
1) mixing and stirring plant fiber powder, a water-based adhesive and plant oil uniformly according to parts by weight, putting the mixture into a drying device, heating and baking the mixture, and cooling the mixture to obtain a mixture A for later use;
2) mixing and stirring edible starch and wheat flour uniformly, adding an emulsifier and a composite foaming agent, and continuously stirring uniformly to obtain a mixture B for later use;
3) uniformly mixing and stirring the mixture A obtained in the step 1) and the mixture B obtained in the step 2), adding deionized water A, stirring uniformly, pouring into a mold, putting the mold into an oven, heating, foaming and shaping, and demolding to obtain the packaging material.
10. The preparation method of the environment-friendly degradable buffering packaging material as claimed in claim 9, wherein the preparation method comprises the following steps: the heating temperature in the step 1) is 100-160 ℃, and the baking time is 20-60 min; and 3) putting the mould into an oven for heating at the temperature of 110-.
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