CN113789038B - Natural degradable plastic bag and production process thereof - Google Patents
Natural degradable plastic bag and production process thereof Download PDFInfo
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- CN113789038B CN113789038B CN202111126687.XA CN202111126687A CN113789038B CN 113789038 B CN113789038 B CN 113789038B CN 202111126687 A CN202111126687 A CN 202111126687A CN 113789038 B CN113789038 B CN 113789038B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2403/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2403/04—Starch derivatives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2491/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
- C08J2491/06—Waxes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2497/00—Characterised by the use of lignin-containing materials
- C08J2497/02—Lignocellulosic material, e.g. wood, straw or bagasse
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- 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
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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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
- C08K5/134—Phenols containing ester groups
- C08K5/1345—Carboxylic esters of phenolcarboxylic acids
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Abstract
The invention relates to the technical field of plastic bag production, in particular to a naturally degradable plastic bag and a production process thereof; the material is prepared from the following raw materials in parts by weight: 75-95 parts of polylactic acid, 48-65 parts of polybutylene succinate, 7-10 parts of polyethylene, 3.0-4.5 parts of functional agent, 2.8-3.6 parts of regulator, 20-30 parts of reinforcing fiber, 4.0-4.8 parts of modified decomposition accelerator, 5-8 parts of filler and 3.8-4.5 parts of lubricant; the plastic bag prepared by the invention has good luster and touch feeling, good mechanical property and improved quality. Furthermore, the waste can be naturally degraded, so that the environment is not polluted, and the generation of white garbage is reduced; in addition, the residues generated after the plastic bag is decomposed can also remove heavy metals in the soil, thereby playing the role of restoring the soil and composting.
Description
Technical Field
The invention relates to the technical field of plastic bag production, in particular to a natural degradable plastic bag and a production process thereof.
Background
Plastic bags are made of thin and flammable plastic films, are used for containing other articles, are commonly found in supermarkets, traditional markets, department stores, warehouses, garbage yards and the like, and are indispensable articles in daily life of people.
Plastic bags are widely used because of the advantages of low cost, light weight, large capacity, convenient storage and the like, but are forbidden to be produced and used by some countries because of the defects of extremely long degradation period, difficult treatment, easy white pollution and environmental pollution.
Based on the technical problems, the technical problems to be solved by the technicians in the field are to provide the natural degradable plastic bag and the production process thereof.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a naturally degradable plastic bag, which has the advantages that: the soil-based composite material can be degraded naturally, the generation of white garbage is reduced, and residues generated after the white garbage is decomposed can also remove heavy metals in soil, so that the effects of repairing the soil and composting are achieved.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a natural degradable plastic bag is prepared from the following raw materials in parts by weight: 75-95 parts of polylactic acid, 48-65 parts of polybutylene succinate, 7-10 parts of polyethylene, 3.0-4.5 parts of functional agent, 2.8-3.6 parts of regulator, 20-30 parts of reinforcing fiber, 4.0-4.8 parts of modified decomposition accelerator, 5-8 parts of filler and 3.8-4.5 parts of lubricant.
By adopting the technical scheme: the invention takes polylactic acid as the main raw material, so that the prepared plastic bag has good luster and touch feeling and also has good biodegradability. Wherein, the polybutylene succinate is also easy to be decomposed and metabolized by various microorganisms in nature or enzymes in animals and plants, and finally decomposed into carbon dioxide and water, thus being a typical completely biodegradable polymer material.
In conclusion, the plastic bag prepared by the invention can be naturally degraded to the greatest extent, and the generation of white garbage is reduced.
The invention is further provided with: the functional agent is selected from any one of A-6641 or Esuno 5004K.
By adopting the technical scheme: the use of the functional agent not only can effectively improve the interfacial strength among polylactic acid, polybutylene succinate and polyethylene, but also can effectively improve the interfacial binding force among the filler, the modified decomposition accelerator and the reinforcing fiber, and among the polylactic acid, the polybutylene succinate and the polyethylene, so that the filler, the reinforcing fiber and other substances can be uniformly dispersed in a melt phase formed by the polylactic acid, the polybutylene succinate and the polyethylene, thereby achieving the purpose of improving the performance of the plastic bag.
The invention is further provided with: the regulator is any one of antioxidant 1010 or antioxidant 264.
By adopting the technical scheme: the use of the regulator can play a role in slowly oxidizing the plastic bag, and the regulator is matched with microorganisms in soil to effectively degrade the plastic bag, so that the generation of white garbage is reduced.
The invention is further provided with: and the composite reinforcing fiber is Richcel fiber.
By adopting the technical scheme: the use of the Lisai fiber can obviously improve the elastic modulus of the prepared plastic bag, so that the plastic bag has excellent mechanical properties. In addition, the Richcel fiber belongs to natural plant fibers, and wastes of the Richcel fiber can be naturally degraded, so that the pollution to the environment is avoided.
The invention is further provided with: the preparation method of the modified decomposition accelerator comprises the following steps:
a. accurately weighing dry micronized starch with the water mass fraction of less than 1% and Biofiler (TM) 108C with the water mass fraction of 25-40%, and placing the weighed starch in a mixing container;
b. accurately weighing distearoyl oxygen isopropyl aluminate with the mass of 2-4% of that of starch, adding ethyl acetate into distearoyl oxygen isopropyl aluminate according to the standard of 10-15mL/g, simultaneously adding the BiofillerTM108C weighed in the step a, and uniformly mixing and stirring to obtain a mixture formed by the three;
c. c, dripping the mixture obtained in the step b into the dry micronized starch in a mixing container at room temperature, premixing the mixture for 3-5min at the speed of 120-200r/min while dripping, and then transferring the obtained mixture into a kneader for heating and stirring; wherein the heating temperature in the kneader is set to 60-80 ℃, and the stirring time is set to 30-50min; the rotating speed is set to be 30-60rpm; d. c, finally placing the mixture obtained in the step in a reaction kettle, reacting for 100-150min at the temperature of 100-120 ℃, and cooling the mixture in the reaction kettle to room temperature after the reaction is finished, wherein the finished product of the modified decomposition accelerator is obtained in the reaction kettle.
By adopting the technical scheme: according to the invention, the surface of the dry refined starch is modified by distearoyl oxygen isopropyl aluminate, and the modified surface of the dry refined starch forms rich hydrophobic groups, so that the hydrophilic groups are changed into hydrophobicity, namely, the phenomenon that the starch is dissolved when a plastic bag is contacted with water, and finally, biofillerTM108C is exposed is avoided, and the normal use of the plastic bag is ensured.
Furthermore, it was mixed with BiofilerTM 108C and finally made into a modified decomposition accelerator. When the plastic bag is contacted with the soil, the starch itself is consumed (which itself can be used as an energy source for the microorganism) by the action of the microorganism in the soil, and then the biofiler (tm) 108C in the modified decomposition accelerator is exposed, which accelerates not only the rate of biodegradation of the plastic bag but also the rate of photo-oxidative degradation thereof. The plastic bag can be rapidly and completely degraded, and the environment is not polluted. In addition, the BiofilerTM 108C is environment-friendly, and does not cause secondary pollution to the environment. In addition, the residues generated after the plastic bag is decomposed can also remove heavy metals in the soil, thereby playing the role of restoring the soil and composting.
The invention is further provided with: the filler is calcium carbonate or barium carbonate, and the fineness of the filler is 700-800 meshes.
By adopting the technical scheme: the filler can not only effectively improve the tensile strength of the plastic bag prepared by the invention. In addition, the material and the functional agent are matched for use, so that the compatibilization effect on other raw materials can be achieved, the materials are uniformly dispersed in a melt phase formed by polylactic acid, polybutylene succinate and polyethylene, and the quality of the plastic bag is ensured.
The invention is further provided with: the lubricant is selected from any one of stearyl stearate or paraffin.
By adopting the technical scheme: the use of the lubricant can effectively reduce the friction force among materials, so that the materials can be uniformly fused and dispersed in a molten phase formed by polylactic acid, polybutylene succinate and polyethylene, and the quality of the prepared plastic bag is ensured.
Another object of the present invention is to provide a process for producing a naturally degradable plastic bag, comprising the steps of:
s1, accurately weighing the raw materials according to the weight parts, shearing a single reinforced fiber into plant fibers with proper length by adopting a fiber shearing machine, and respectively storing the raw materials for later use;
s2, uniformly mixing all raw materials except polylactic acid, poly (butylene succinate), polyethylene and sheared plant fibers in a high-speed mixer, then adding the plant fibers, the polylactic acid, the poly (butylene succinate) and the polyethylene into the mixture respectively, mixing at a high speed, and then carrying out melt extrusion and granulation on the materials by a double-screw extruder;
s3, transferring the granules obtained in the step S2 into a film blowing machine, preheating the film blowing machine to 180-210 ℃, and then performing film blowing treatment at a starting temperature of 110-135 ℃ to obtain film paper with a certain thickness;
s4, cooling the film paper obtained in the step S3 to room temperature under natural conditions, sealing the bottom of the film paper by using a plastic bag sealing machine, and flattening the whole film paper for later use after sealing is finished;
s5, cutting the periphery of the plastic bag flattened in the S4 by using a cutting machine to enable the edge of the plastic bag to be flat, and obtaining a degradable plastic bag finished product; and then detecting the prepared plastic bag, and removing defective products with unqualified quality.
By adopting the technical scheme: the raw materials adopted in the invention are mostly degradable, and the prepared plastic bag has good degradability. The waste can be naturally degraded, so that the pollution to the environment is avoided, the generation of white garbage is reduced, and the environment is protected. In addition, the plastic bag prepared by the invention has excellent mechanical property and better touch feeling, and improves the quality of the plastic bag.
In summary, the invention has the following advantages:
1. the plastic bag prepared by the invention can be naturally degraded, so that the generation of white garbage is reduced;
2. the residues generated after the plastic bag prepared by the invention is decomposed can remove heavy metals in soil, and the effects of restoring the soil and composting are achieved.
Detailed Description
In order to further remove the objects, technical solutions and advantages of the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be removed and fully described below in connection with the embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
Example 1:
a natural degradable plastic bag is prepared from the following raw materials in parts by weight: 75 parts of polylactic acid, 48 parts of polybutylene succinate, 7 parts of polyethylene, 3.0 parts of a functional agent, 2.8 parts of a regulator, 20 parts of reinforcing fibers, 4.0 parts of a modified decomposition accelerator, 5 parts of a filler and 3.8 parts of a lubricant.
The functional agent is A-6641.
The regulator is antioxidant 1010.
The composite reinforcing fiber is Richcel fiber.
The preparation method of the modified decomposition accelerator comprises the following steps:
a. accurately weighing the dry micronized starch with the quantitative water mass fraction of less than 0.6% and the Biofiler (TM) 108C with the mass of 25% of the dry micronized starch, and placing the weighed starch in a mixing container;
b. accurately weighing distearoyl oxygen isopropyl aluminate with the mass of 2% of that of starch, adding ethyl acetate into distearoyl oxygen isopropyl aluminate according to the standard of 10mL/g, simultaneously adding the Biofiler (TM) 108C weighed in the step a, and uniformly mixing and stirring to obtain a mixture formed by the three;
c. c, dripping the mixture obtained in the step b into the dry micronized starch in a mixing container at room temperature, premixing the mixture for 3min at the speed of 120r/min while dripping, and then transferring the obtained mixture into a kneader for heating and stirring;
wherein the heating temperature in the kneader is set to 60-80 ℃, and the stirring time is set to 30min; the rotational speed was set at 30rpm; d. c, finally placing the mixture obtained in the step in a reaction kettle, reacting for 100min at the temperature of 100 ℃, and cooling the mixture in the reaction kettle to room temperature after the reaction is finished, wherein the finished product of the modified decomposition accelerator is obtained in the reaction kettle.
The filler is calcium carbonate, and the fineness of the filler is 700 meshes.
The lubricant is stearyl stearate.
A production process of a naturally degradable plastic bag comprises the following steps:
s1, accurately weighing the raw materials according to the weight parts, shearing a single reinforced fiber into plant fibers with proper length by adopting a fiber shearing machine, and respectively storing the raw materials for later use;
s2, uniformly mixing all raw materials except polylactic acid, poly (butylene succinate), polyethylene and sheared plant fibers in a high-speed mixer, then adding the plant fibers, the polylactic acid, the poly (butylene succinate) and the polyethylene into the mixture respectively, mixing at a high speed, and then carrying out melt extrusion and granulation on the materials by a double-screw extruder;
s3, transferring the granules obtained in the step S2 into a film blowing machine, preheating the film blowing machine to 180 ℃, and then performing film blowing treatment under the condition that the starting temperature is 110 ℃ to obtain film paper with a certain thickness;
s4, cooling the film paper obtained in the step S3 to room temperature under natural conditions, sealing the bottom of the film paper by using a plastic bag sealing machine, and flattening the whole film paper for later use after sealing is finished;
s5, cutting the periphery of the plastic bag flattened in the S4 by using a cutting machine to enable the edge of the plastic bag to be flat, and obtaining a degradable plastic bag finished product; and then detecting the prepared plastic bag, and removing defective products with unqualified quality.
Example 2:
a natural degradable plastic bag is prepared from the following raw materials in parts by weight: 85 parts of polylactic acid, 55 parts of polybutylene succinate, 8 parts of polyethylene, 3.5 parts of a functional agent, 3.2 parts of a regulator, 25 parts of reinforcing fibers, 4.5 parts of a modified decomposition accelerator, 6 parts of a filler and 4.2 parts of a lubricant.
EsunBio5004K is used as the functional agent.
The regulator is antioxidant 264.
The composite reinforcing fiber is Richcel fiber.
The preparation method of the modified decomposition accelerator comprises the following steps:
a. accurately weighing the dry micronized starch with the quantitative water mass fraction of less than 0.8% and the Biofiler (TM) 108C with the mass of 30% of the dry micronized starch, and placing the weighed starch in a mixing container;
b. accurately weighing distearoyl oxygen isopropyl aluminate with the mass of 3% of starch, adding ethyl acetate into distearoyl oxygen isopropyl aluminate according to the standard of 12mL/g, simultaneously adding the Biofiler (TM) 108C weighed in the step a, and uniformly mixing and stirring to obtain a mixture formed by the three;
c. c, dripping the mixture obtained in the step b into the dry micronized starch in a mixing container at room temperature, premixing the mixture for 4min at the speed of 160r/min while dripping, and then transferring the obtained mixture into a kneader for heating and stirring;
wherein the heating temperature in the kneader is set to 70 ℃, and the stirring time is set to 40min; the rotational speed was set to 48rpm;
d. c, finally placing the mixture obtained in the step in a reaction kettle, reacting for 120min at the temperature of 110 ℃, and cooling the mixture in the reaction kettle to room temperature after the reaction is finished, wherein the finished product of the modified decomposition accelerator is obtained in the reaction kettle.
The filler is barium carbonate, and the fineness of the filler is 750 meshes.
The lubricant is paraffin.
A production process of a naturally degradable plastic bag comprises the following steps:
s1, accurately weighing the raw materials according to the weight parts, shearing a single reinforced fiber into plant fibers with proper length by adopting a fiber shearing machine, and respectively storing the raw materials for later use;
s2, uniformly mixing all raw materials except polylactic acid, poly (butylene succinate), polyethylene and sheared plant fibers in a high-speed mixer, then adding the plant fibers, the polylactic acid, the poly (butylene succinate) and the polyethylene into the mixture respectively, mixing at a high speed, and then carrying out melt extrusion and granulation on the materials by a double-screw extruder;
s3, transferring the granules obtained in the step S2 into a film blowing machine, preheating the film blowing machine to 200 ℃, and then performing film blowing treatment under the condition that the starting temperature is 120 ℃ to obtain film paper with a certain thickness;
s4, cooling the film paper obtained in the step S3 to room temperature under natural conditions, sealing the bottom of the film paper by using a plastic bag sealing machine, and flattening the whole film paper for later use after sealing is finished;
s5, cutting the periphery of the plastic bag flattened in the S4 by using a cutting machine to enable the edge of the plastic bag to be flat, and obtaining a degradable plastic bag finished product; and then detecting the prepared plastic bag, and removing defective products with unqualified quality.
Example 3:
a natural degradable plastic bag is prepared from the following raw materials in parts by weight: 95 parts of polylactic acid, 65 parts of polybutylene succinate, 10 parts of polyethylene, 4.5 parts of functional agent, 3.6 parts of regulator, 30 parts of reinforcing fiber, 4.8 parts of modified decomposition accelerator, 8 parts of filler and 4.5 parts of lubricant.
The functional agent is A-6641.
The regulator is antioxidant 1010.
The composite reinforcing fiber is Richcel fiber.
The preparation method of the modified decomposition accelerator comprises the following steps:
a. accurately weighing dry micronized starch with the water mass fraction of less than 1% and Biofiler (TM) 108C with the water mass fraction of 40%, and placing the weighed starch in a mixing container;
b. accurately weighing distearoyl oxygen isopropyl aluminate with the mass of 4% of starch, adding ethyl acetate into distearoyl oxygen isopropyl aluminate according to the standard of 15mL/g, simultaneously adding the Biofiler (TM) 108C weighed in the step a, and uniformly mixing and stirring to obtain a mixture formed by the three;
c. c, dripping the mixture obtained in the step b into the dry micronized starch in a mixing container at room temperature, premixing the mixture at the speed of 200r/min for 5min while dripping, and then transferring the obtained mixture into a kneader for heating and stirring;
wherein the heating temperature in the kneader is set to 80 ℃, and the stirring time is set to 50min; the rotational speed was set to 60rpm;
d. c, finally placing the mixture obtained in the step in a reaction kettle, reacting for 150min at the temperature of 120 ℃, and cooling the mixture in the reaction kettle to room temperature after the reaction is finished, wherein the finished product of the modified decomposition accelerator is obtained in the reaction kettle.
The filler is calcium carbonate, and the fineness of the filler is 800 meshes.
The lubricant is stearyl stearate.
A production process of a naturally degradable plastic bag comprises the following steps:
s1, accurately weighing the raw materials according to the weight parts, shearing a single reinforced fiber into plant fibers with proper length by adopting a fiber shearing machine, and respectively storing the raw materials for later use;
s2, uniformly mixing all raw materials except polylactic acid, poly (butylene succinate), polyethylene and sheared plant fibers in a high-speed mixer, then adding the plant fibers, the polylactic acid, the poly (butylene succinate) and the polyethylene into the mixture respectively, mixing at a high speed, and then carrying out melt extrusion and granulation on the materials by a double-screw extruder;
s3, transferring the granules obtained in the step S2 into a film blowing machine, preheating the film blowing machine to 210 ℃, and then performing film blowing treatment under the condition that the starting temperature is 135 ℃ to obtain film paper with a certain thickness;
s4, cooling the film paper obtained in the step S3 to room temperature under natural conditions, sealing the bottom of the film paper by using a plastic bag sealing machine, and flattening the whole film paper for later use after sealing is finished;
s5, cutting the periphery of the plastic bag flattened in the S4 by using a cutting machine to enable the edge of the plastic bag to be flat, and obtaining a degradable plastic bag finished product; and then detecting the prepared plastic bag, and removing defective products with unqualified quality.
And (3) performance detection:
comparative example: a degradable plastic bag produced by some degradable plastic bag production company in Shandong;
the degradable plastic bags produced by the invention in examples 1-3 and the degradable plastic bags in comparative examples were tested for their respective properties, and the test data obtained are recorded in the following table:
note 1: the experimental method for detecting the removal of heavy metal ions by the plastic bag comprises the following steps: equivalent amounts of the plastic bags provided in the comparative examples and the plastic bags prepared in examples 1-3 were embedded with Cu 2+ Pb 2+ And measuring the concentration of heavy metal ions in the soil before being buried and the concentration of heavy metal ions in the soil after 60 days, and calculating the reduction rate of the heavy metal ions according to the following formula:
(M represents Cu or Pb)
From the relevant data in the table above, it can be seen that: the degradable plastic bag produced by the invention has good mechanical property, and the waste can be naturally degraded, so that the environment is not polluted, and the generation of white garbage is reduced. In addition, the residues generated after the plastic bag is decomposed can also remove heavy metals in the soil, thereby playing a role in restoring the soil.
In conclusion, the degradable plastic bag produced by the invention has better quality, more functions and more suitability for popularization.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. within the design concept of the present invention should be included in the scope of the present invention.
Claims (7)
1. A naturally degradable plastic bag, which is characterized in that: the material is prepared from the following raw materials in parts by weight: 75-95 parts of polylactic acid, 48-65 parts of polybutylene succinate, 7-10 parts of polyethylene, 3.0-4.5 parts of functional agent, 2.8-3.6 parts of regulator, 20-30 parts of reinforcing fiber, 4.0-4.8 parts of modified decomposition accelerator, 5-8 parts of filler and 3.8-4.5 parts of lubricant;
the preparation method of the modified decomposition accelerator comprises the following steps:
a. accurately weighing dry micronized starch with the water mass fraction of less than 1% and Biofiler (TM) 108C with the water mass fraction of 25-40%, and placing the weighed starch in a mixing container;
b. accurately weighing distearoyl oxygen isopropyl aluminate with the mass of 2-4% of that of starch, adding ethyl acetate into distearoyl oxygen isopropyl aluminate according to the standard of 10-15mL/g, simultaneously adding the BiofillerTM108C weighed in the step a, and uniformly mixing and stirring to obtain a mixture formed by the three;
c. c, dripping the mixture obtained in the step b into the dry micronized starch in a mixing container at room temperature, premixing the mixture for 3-5min at the speed of 120-200r/min while dripping, and then transferring the obtained mixture into a kneader for heating and stirring;
wherein the heating temperature in the kneader is set to 60-80 ℃, and the stirring time is set to 30-50min; the rotating speed is set to be 30-60rpm;
d. c, finally placing the mixture obtained in the step in a reaction kettle, reacting for 100-150min at the temperature of 100-120 ℃, and cooling the mixture in the reaction kettle to room temperature after the reaction is finished, wherein the finished product of the modified decomposition accelerator is obtained in the reaction kettle.
2. A naturally degradable plastic bag of claim 1, wherein: the functional agent is selected from any one of A-6641 or Esuno 5004K.
3. A naturally degradable plastic bag of claim 1, wherein: the regulator is any one of antioxidant 1010 or antioxidant 264.
4. A naturally degradable plastic bag of claim 1, wherein: and the reinforcing fiber is Richcel fiber.
5. The naturally degradable plastic bag of claim 1, wherein the filler is calcium carbonate or barium carbonate, and the fineness of the filler is 700-800 meshes.
6. A naturally degradable plastic bag of claim 1, wherein: the lubricant is selected from any one of stearyl stearate or paraffin.
7. The production process of the naturally degradable plastic bag according to any one of claims 1 to 6, which is characterized by comprising the following steps:
s1, accurately weighing the raw materials according to the weight parts, shearing a single reinforced fiber into plant fibers with proper length by adopting a fiber shearing machine, and respectively storing the raw materials for later use;
s2, uniformly mixing all raw materials except polylactic acid, poly (butylene succinate), polyethylene and sheared plant fibers in a high-speed mixer, then adding the plant fibers, the polylactic acid, the poly (butylene succinate) and the polyethylene into the mixture respectively, mixing at a high speed, and then carrying out melt extrusion and granulation on the materials by a double-screw extruder;
s3, transferring the granules obtained in the step S2 into a film blowing machine, preheating the film blowing machine to 180-210 ℃, and then performing film blowing treatment at a starting temperature of 110-135 ℃ to obtain film paper with a certain thickness;
s4, cooling the film paper obtained in the step S3 to room temperature under natural conditions, sealing the bottom of the film paper by using a plastic bag sealing machine, and flattening the whole film paper for later use after sealing is finished;
s5, cutting the periphery of the plastic bag flattened in the S4 by using a cutting machine to enable the edge of the plastic bag to be flat, and obtaining a degradable plastic bag finished product; and then detecting the prepared plastic bag, and removing defective products with unqualified quality.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102558794A (en) * | 2010-12-09 | 2012-07-11 | 比亚迪股份有限公司 | Blending material and preparing method thereof as well as degradable packing material and preparing method thereof |
| CN106009065A (en) * | 2016-05-30 | 2016-10-12 | 蚌埠市维光塑胶制品有限公司 | Plastic bag capable of directly improving activity of soil after being degraded |
| KR20180044715A (en) * | 2016-10-24 | 2018-05-03 | 롯데정밀화학 주식회사 | Biodegradable resin composition and biodegradable articles prepared therefrom |
| CN109206868A (en) * | 2018-08-29 | 2019-01-15 | 桐城市强峰包装有限公司 | A kind of Plastics and preparation method thereof |
| CN111040400A (en) * | 2019-12-27 | 2020-04-21 | 周锐 | Full-biodegradable sheet and preparation method thereof |
| CN113185819A (en) * | 2021-04-25 | 2021-07-30 | 昆山金盟塑料薄膜有限公司 | Green biodegradable plastic film and energy-saving processing technology thereof |
-
2021
- 2021-09-26 CN CN202111126687.XA patent/CN113789038B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102558794A (en) * | 2010-12-09 | 2012-07-11 | 比亚迪股份有限公司 | Blending material and preparing method thereof as well as degradable packing material and preparing method thereof |
| CN106009065A (en) * | 2016-05-30 | 2016-10-12 | 蚌埠市维光塑胶制品有限公司 | Plastic bag capable of directly improving activity of soil after being degraded |
| KR20180044715A (en) * | 2016-10-24 | 2018-05-03 | 롯데정밀화학 주식회사 | Biodegradable resin composition and biodegradable articles prepared therefrom |
| CN109206868A (en) * | 2018-08-29 | 2019-01-15 | 桐城市强峰包装有限公司 | A kind of Plastics and preparation method thereof |
| CN111040400A (en) * | 2019-12-27 | 2020-04-21 | 周锐 | Full-biodegradable sheet and preparation method thereof |
| CN113185819A (en) * | 2021-04-25 | 2021-07-30 | 昆山金盟塑料薄膜有限公司 | Green biodegradable plastic film and energy-saving processing technology thereof |
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