CN112280108A - Starch-based degradable safe and environment-friendly packaging box and preparation method thereof - Google Patents
Starch-based degradable safe and environment-friendly packaging box and preparation method thereof Download PDFInfo
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- CN112280108A CN112280108A CN202011338753.5A CN202011338753A CN112280108A CN 112280108 A CN112280108 A CN 112280108A CN 202011338753 A CN202011338753 A CN 202011338753A CN 112280108 A CN112280108 A CN 112280108A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
- C08L3/02—Starch; Degradation products thereof, e.g. dextrin
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Wrappers (AREA)
- Biological Depolymerization Polymers (AREA)
Abstract
The invention discloses a starch-based degradable safe and environment-friendly packaging box and a preparation method thereof, and relates to the technical field of plastic products. The method comprises the following steps: 40-55 parts of starch-based material, 20-30 parts of polypropylene, 2-6 parts of polyolefin elastomer, 5-11 parts of glycerol, 25-35 parts of filler and 0.5-1.5 parts of antioxidant. The preparation method comprises the following steps: 1) putting a starch-based material, polypropylene, a polyolefin elastomer, glycerol, a filler and an antioxidant into a 105 ℃ high-speed stirrer according to the weight part ratio of claim 1, stirring for a certain time, and then putting the mixture into a cold stirrer to cool to 60 ℃ to obtain a premix; 2) putting the premix in the step 1) into a parallel double-screw extruder, carrying out melt blending, extruding material strips, cooling by an air bed, and then pelletizing; 3) cooling the granules in the step 2) by an air bed, and putting the granules into a granulation auxiliary machine for granulation to obtain uniform granules with uniform granules; 4) and (3) putting the uniform granules obtained in the step 3) into an injection molding machine, and obtaining the packaging box after injection molding. The packaging box prepared by the invention is safe, environment-friendly and degradable.
Description
Technical Field
The invention relates to the technical field of plastic products, in particular to a starch-based degradable safe and environment-friendly packaging box and a preparation method thereof.
Background
The plastic packaging material has rich raw material sources, low cost and excellent performance, is widely applied to food packaging, and gradually replaces the traditional packaging materials such as glass, metal, paper and the like. The plastic has the characteristics of light weight, convenient use, good barrier property, heat resistance, corrosion resistance and the like, but the plastic packaging material has the defects of difficult degradation and toxic gas generation caused by burning. Moreover, the plastic packaging material belongs to the variety with the shortest service cycle among plastic products, generally 1 month to 3 months, and the longest one year, and is discarded after that, thereby causing serious white pollution.
Therefore, research work on degradable plastic food packaging bags is widely carried out at home and abroad, and most of the research and development are on biodegradable plastic products. Biodegradable plastics are plastics which are degraded under natural conditions by the life activities of soil microorganisms and can be classified into two major types, namely chemically synthesized polymer-based plastics and natural polymer-based plastics. From the viewpoint of degradation mechanism, biodegradable plastics can be divided into incompletely biodegradable plastics and completely biodegradable plastics. The completely biodegradable plastic can be finally decomposed into inorganic substances such as water, carbon dioxide and the like, but the plastic has the problems of difficult processing, poor water resistance, higher processing cost and the like, and is difficult to industrially popularize and apply at present.
The starch-based plastic belongs to one of natural polymer-based and incomplete biodegradable plastics, and the starch-based filling type plastic is usually prepared by adding starch and other additives into general-purpose plastics (PE, PP and the like). From the perspective of saving petrochemical resources, starch is a renewable biomass resource, and a corresponding starch-based plastic product is a genuine low-carbon product, so that the petrochemical resources can be saved to a great extent. The starch can be completely degraded in natural environment, the degradation of the starch-based plastic mainly depends on the decomposition of starch components, and the plastic base material cannot be degraded; however, starch breakdown leaves small holes in the plastic substrate or pieces that render the entire plastic recalcitrant. The fragmented materials have no degradation performance, are difficult to recover, still cause pollution to the soil environment and cannot thoroughly solve the problem of white pollution.
The starch-based degradable material contains plant fiber and plant starch, belongs to thermoplastic plastics, can be recycled, is degradable and easy to machine and form, reaches the standard of food-grade packing materials, does not contain heavy metal and plasticizer, and is an ideal environment-friendly packing box material.
Disclosure of Invention
The invention aims to solve the technical problems and provides a starch-based degradable safe and environment-friendly anti-theft snack box and a preparation method thereof, wherein the starch-based degradable safe and environment-friendly anti-theft snack box is degradable and cannot influence the environment.
The invention is realized by the following technical scheme:
a starch-based degradable safe and environment-friendly packaging box is composed of the following raw materials in parts by weight: 40-55 parts of starch-based material, 20-30 parts of polypropylene, 2-6 parts of polyolefin elastomer, 5-11 parts of glycerol, 25-35 parts of filler and 0.5-1.5 parts of antioxidant.
Further, the composition comprises the following raw materials in parts by weight: 50 parts of starch-based material, 25 parts of polypropylene, 4 parts of polyolefin elastomer, 7 parts of glycerol, 30 parts of filler and 1 part of antioxidant.
Further, the starch-based material is one or more of tapioca starch, corn starch, potato starch, corn flour and potato flour.
Further, the filler is a biomineral filler and/or a biomass filler.
Furthermore, the ecological mineral filler is one or more of calcium carbonate, talcum powder and desert sand powder; the biomass filler is one or more of shell powder, wood powder, bamboo powder and straw powder.
Further, the antioxidant is tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ].
A preparation method of a starch-based degradable safe and environment-friendly packaging box comprises the following steps:
1) putting a starch-based material, polypropylene, a polyolefin elastomer, glycerol, a filler and an antioxidant in a 105 ℃ high-speed stirrer according to the weight part ratio of claim 1, stirring at 1200r/min, adjusting the stirring speed to 600r/min when the material temperature reaches 120 ℃, stirring for 10 minutes, and then putting the mixture into a cold stirrer to cool to 60 ℃ to obtain a premix;
2) putting the premix in the step 1) into a parallel double-screw extruder, carrying out melt blending, extruding material strips, cooling by an air bed, and then pelletizing to obtain granules;
3) cooling the granules in the step 2) by an air bed, and putting the granules into a granulation auxiliary machine for granulation to obtain uniform granules with uniform granules;
4) and (3) putting the uniform granules obtained in the step 3) into an injection molding machine, and obtaining the packaging box after injection molding.
Further, in the step 1, the filler is crushed to 200-300 meshes.
Further, in the step 2, the length-diameter ratio of the parallel twin-screw extruder is 52: 1, the set temperature is 150 ℃ and 185 ℃.
Further, in the step 4, the temperature of the heating temperature zone of the injection molding machine is set to 185-.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the starch-based degradable safe and environment-friendly packaging box and the preparation method have the advantages of excellent overall performance and low cost. The starch prepared from corn, potato and cassava has wide sources, various varieties and low cost; the filled ecological mineral filler and biomass filler can greatly improve the mutual dispersibility and compatibility of materials in a mixed material system and increase the hardness and strength of the packaging box; the added polyolefin elastomer reduces the brittleness of the product and increases the flexibility of the material of the packaging box.
2. The starch-based degradable safe and environment-friendly packaging box and the preparation method thereof have the advantages that the packaging box is environment-friendly, safe and degradable. The packaging box contains plant fiber and plant starch with high content, belongs to thermoplastic plastics, can be recycled, is degradable and is easy to process and mold, and the material reaches the standard of food-grade packaging materials; the packaging box does not contain heavy metal and plasticizer, and is an ideal environment-friendly packaging box material; the method meets the food-grade packing conditions, and the indexes of the comprehensive educts of n-hexane, ethanol and acetic acid in the key evaporation residues meet the national standard, thereby belonging to safe and environment-friendly materials; the packing box is in moist soil, the microorganism can cause the material to mildew and break, the disintegrating degradation is achieved, the disintegrating substance can not generate any harmful ingredient, the disintegrating degradation can be slowly carried out under the sun exposure, and the environment can not be polluted.
3. The starch-based degradable safe and environment-friendly packaging box and the preparation method can be repeatedly used under daily living conditions, and have the advantages of temperature resistance, cold and hot resistance, leakage prevention, good barrier property, and basically unchanged strength and physical properties.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are only a few specific examples of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by the design concept should fall within the scope of infringing on the protection scope of the present invention.
In one embodiment, the starch-based degradable safe and environment-friendly packaging box is composed of the following raw materials in parts by weight: 50 parts of starch-based material, 25 parts of polypropylene, 4 parts of polyolefin elastomer, 7 parts of glycerol, 30 parts of filler and 1 part of antioxidant.
In another embodiment, the starch-based degradable safe and environment-friendly packaging box is composed of the following raw materials in parts by weight: 40 parts of starch-based material, 20 parts of polypropylene, 2 parts of polyolefin elastomer, 5 parts of glycerol, 25 parts of filler and 0.5 part of antioxidant.
In another embodiment, the starch-based degradable safe and environment-friendly packaging box is composed of the following raw materials in parts by weight: 55 parts of starch-based material, 30 parts of polypropylene, 6 parts of polyolefin elastomer, 11 parts of glycerol, 35 parts of filler and 1.5 parts of antioxidant.
In one embodiment, the starch-based material is one or more of tapioca starch, potato starch, corn flour, and potato flour.
In one embodiment, the filler is a biomineral filler and/or a biomass filler.
In one embodiment, the ecological mineral filler is one or more of calcium carbonate, talc powder and desert sand powder; the biomass filler is one or more of shell powder, wood powder, bamboo powder and straw powder.
In one embodiment, the antioxidant is tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propanoic acid ].
In the above embodiment, a preparation method of the starch-based degradable safe and environment-friendly packaging box is as follows.
In one embodiment, the preparation method comprises the following steps:
1) putting a starch-based material, polypropylene, a polyolefin elastomer, glycerol, a filler and an antioxidant in a 105 ℃ high-speed stirrer according to the weight part ratio of claim 1, stirring at 1200r/min, adjusting the stirring speed to 600r/min when the material temperature reaches 120 ℃, stirring for 10 minutes, and then putting the mixture into a cold stirrer to cool to 60 ℃ to obtain a premix;
2) putting the premix in the step 1) into a parallel double-screw extruder, carrying out melt blending, extruding material strips, cooling by an air bed, and then pelletizing to obtain granules;
3) cooling the granules in the step 2) by an air bed, and putting the granules into a granulation auxiliary machine for granulation to obtain uniform granules with uniform granules;
4) and (3) putting the uniform granules obtained in the step 3) into an injection molding machine, and obtaining the packaging box after injection molding.
In one embodiment, in step 1, the filler is crushed to 200-300 mesh.
In one embodiment, in the step 2, the length-to-diameter ratio of the parallel twin-screw extruder is 52: 1, the set temperature is 150 ℃ and 185 ℃.
In one embodiment, in the step 4, the temperature of the heating temperature zone of the injection molding machine is set to 185-.
The starch content of the packaging box prepared by the invention is more than 40% of that of starch-based plastic, the product can reach food-grade safety, the results of total residue migration, potassium permanganate consumption, evaporation residues, heavy metals, decolorization tests and the like in physicochemical indexes completely meet national standards, and the packaging box has the advantages of excellent overall performance, low cost, environmental protection, safety and degradability.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The starch-based degradable safe and environment-friendly packaging box is characterized by comprising the following raw materials in parts by weight: 40-55 parts of starch-based material, 20-30 parts of polypropylene, 2-6 parts of polyolefin elastomer, 5-11 parts of glycerol, 25-35 parts of filler and 0.5-1.5 parts of antioxidant.
2. The starch-based degradable safe and environment-friendly packaging box according to claim 1, which is composed of the following raw materials in parts by weight: 50 parts of starch-based material, 25 parts of polypropylene, 4 parts of polyolefin elastomer, 7 parts of glycerol, 30 parts of filler and 1 part of antioxidant.
3. The starch-based degradable safe and environment-friendly packaging box as claimed in claim 1 or 2, wherein the starch-based material is one or more of tapioca starch, corn flour and potato flour.
4. A starch-based degradable safe and environment-friendly packaging box according to claim 1 or 2, wherein the filler is a biological mineral filler and/or a biomass filler.
5. The starch-based degradable safe and environment-friendly packaging box according to claim 4, wherein the ecological mineral filler is one or more of calcium carbonate, talcum powder and desert sand powder; the biomass filler is one or more of shell powder, wood powder, bamboo powder and straw powder.
6. The degradable safe and environment-friendly starch-based packaging box as claimed in claim 1 or 2, wherein the antioxidant is tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ].
7. The manufacturing method of the packing box according to claim 1, characterized in that the manufacturing method is as follows:
1) putting a starch-based material, polypropylene, a polyolefin elastomer, glycerol, a filler and an antioxidant in a 105 ℃ high-speed stirrer according to the weight part ratio of claim 1, stirring at 1200r/min, adjusting the stirring speed to 600r/min when the material temperature reaches 120 ℃, stirring for 10 minutes, and then putting the mixture into a cold stirrer to cool to 60 ℃ to obtain a premix;
2) putting the premix in the step 1) into a parallel double-screw extruder, carrying out melt blending, extruding material strips, cooling by an air bed, and then pelletizing to obtain granules;
3) cooling the granules in the step 2) by an air bed, and putting the granules into a granulation auxiliary machine for granulation to obtain uniform granules with uniform granules;
4) and (3) putting the uniform granules obtained in the step 3) into an injection molding machine, and obtaining the packaging box after injection molding.
8. The method for producing a packing box according to claim 7, wherein the filler is pulverized to 200-300 mesh in step 1.
9. The manufacturing method of the packing box according to claim 7, wherein in the step 2, the length-diameter ratio of the parallel twin-screw extruder is 52: 1, the set temperature is 150 ℃ and 185 ℃.
10. The method for preparing the packing box as claimed in claim 7, wherein in the step 4, the temperature of the heating temperature zone of the injection molding machine is set to 185-190 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011338753.5A CN112280108A (en) | 2020-11-25 | 2020-11-25 | Starch-based degradable safe and environment-friendly packaging box and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011338753.5A CN112280108A (en) | 2020-11-25 | 2020-11-25 | Starch-based degradable safe and environment-friendly packaging box and preparation method thereof |
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| CN112280108A true CN112280108A (en) | 2021-01-29 |
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| CN202011338753.5A Withdrawn CN112280108A (en) | 2020-11-25 | 2020-11-25 | Starch-based degradable safe and environment-friendly packaging box and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113603938A (en) * | 2021-07-30 | 2021-11-05 | 宁夏禾易源生物科技有限公司 | Starch-based degradable safe and environment-friendly packaging box and preparation method thereof |
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2020
- 2020-11-25 CN CN202011338753.5A patent/CN112280108A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113603938A (en) * | 2021-07-30 | 2021-11-05 | 宁夏禾易源生物科技有限公司 | Starch-based degradable safe and environment-friendly packaging box and preparation method thereof |
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Application publication date: 20210129 |