CN114015145B - Production process of biodegradable garbage bag - Google Patents
Production process of biodegradable garbage bag Download PDFInfo
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- CN114015145B CN114015145B CN202111541050.7A CN202111541050A CN114015145B CN 114015145 B CN114015145 B CN 114015145B CN 202111541050 A CN202111541050 A CN 202111541050A CN 114015145 B CN114015145 B CN 114015145B
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
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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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—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
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
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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
- C08J2403/02—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
- 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
- C08J2423/08—Copolymers of ethene
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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
- C08K5/05—Alcohols; Metal alcoholates
- C08K5/053—Polyhydroxylic alcohols
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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
- C08K5/06—Ethers; Acetals; Ketals; Ortho-esters
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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
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
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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
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic 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 provides a production process of a biodegradable garbage bag, which comprises the following steps: s1, starting an air cylinder, wherein the air cylinder enables a closing cover to be located at a position for closing a dry material weighing container; s2, putting starch into a filter cylinder of a ball mill, starting the ball mill to enable the fineness of the starch to reach 180 meshes, and enabling the starch to enter the output end of the ball mill, wherein a first weighing device at a dry material weighing container weighs the total weight of the dry material weighing container and the starch in real time to obtain the mass m of the starch in the dry material weighing container; s3, judging whether M is equal to a specified value M or not, and if so, performing a step S4; if not, continuing to execute the step S2; s4, the closing cover and the guide hopper are lifted by the air cylinder, the dry material weighing container is opened by the closing cover, and the output end of the ball mill is closed by the guide hopper extruding opening and closing equipment. The biodegradable garbage bag and the production process thereof solve the problem that the garbage bag and garbage can not be degraded together in the prior art.
Description
Technical Field
The invention relates to a film, in particular to a production process of a biodegradable garbage bag.
Background
Garbage classification (english name is garpage classification) generally refers to a series of activities that store, sort, put, and sort Garbage according to a certain rule or standard, and then convert the Garbage into public resources. The classification aims to improve the resource value and the economic value of the garbage and strive for making the best use of the garbage.
The garbage belongs to the private goods of the public in the classified storage stage, becomes regional quasi-public resources of a community or a community where the public is located after being put in a classified mode by the public, and becomes public resources without exclusivity after being carried to a garbage concentration point or a transfer station in a classified mode. From the viewpoint of methods for classifying domestic garbage in various cities at home and abroad, the domestic garbage is classified according to the components and the production amount of the garbage and by combining the resource utilization and the treatment mode of local garbage.
The classified collection of the garbage can reduce the garbage treatment amount and treatment equipment, reduce the treatment cost, reduce the consumption of land resources and have social, economic, ecological and other benefits.
And 6, month and 25 in 2019, entering a household garbage classification system.
Garbage classification is a trend in the development of contemporary society and is also a duty that people must perform. However, in the garbage classification process, a plurality of garbage bags are needed to contain garbage so as to facilitate storage and garbage transfer in a home, but the existing garbage bags cannot be degraded, so that the difficulty in treating the classified garbage is increased, and the goal of degrading the garbage bags and the garbage together cannot be achieved.
Disclosure of Invention
The invention provides a production process of a biodegradable garbage bag, which solves the problem that the garbage bag and garbage cannot be degraded together in the prior art.
In order to realize the purpose, the invention adopts the following technical scheme:
the invention firstly provides a biodegradable garbage bag which comprises the following components in parts by mass:
solid matter: 30 parts of starch, 42 parts of polyethylene, 10 parts of ethylene-ethyl acrylate copolymer, 5 parts of sorbitol, 0.3 part of stearic acid, 0.5 part of calcium stearate and 1.5 parts of monoglyceride;
liquid substance: 10 parts of glycerol, 7 parts of diethylene glycol and 4 parts of water.
The invention also provides a production process of the biodegradable garbage bag, which comprises the following steps:
s1, starting an air cylinder, enabling a closing cover to be in a position for closing a dry material weighing container, and opening an output end of a ball mill by opening and closing equipment under the elastic force of an elastic piece;
s2, putting starch into a filter cylinder of a ball mill, starting the ball mill to enable the fineness of the starch to reach 180 meshes, and enabling the starch to enter the output end of the ball mill, wherein a first weighing device at a dry material weighing container weighs the total weight of the dry material weighing container and the starch in real time to obtain the mass m of the starch in the dry material weighing container;
s3, judging whether M is equal to a specified value M, and if M is equal to the specified value M, performing a step S4; if not, continuing to execute the step S2;
s4, the closing cover and the guide hopper are lifted by the air cylinder, the dry material weighing container is opened by the closing cover, and the output end of the ball mill is closed by the guide hopper extruding opening and closing equipment;
s5, adding solid substances except starch into a dry material weighing container, and keeping the mass ratio: polyethylene: ethylene-ethyl acrylate copolymer: sorbitol: stearic acid: calcium stearate: monoglyceride portion =420:100:50:3:5:15;
s6, adding a liquid substance into the wet material weighing container, and keeping the mass ratio: 10 parts of glycerol, 7 parts of diethylene glycol and 4 parts of water;
s7, putting the solid substances and the liquid substances in the dry material weighing container and the wet material weighing container into a high-speed mixer, uniformly mixing, and performing pre-gelatinization to obtain a pre-gelatinized mixture;
s8, placing the pre-gelatinized mixture into a screw extruder, and carrying out grafting reaction at 160-190 ℃ to obtain a reactant;
s9, filtering, extruding, granulating and blow-molding reactants at the temperature of 160-170 ℃ to obtain the biodegradable garbage bag.
Preferably, step S7 includes the steps of:
s71, judging whether the ratio of the mass of the dry materials in the dry material weighing container to the mass of the first solution in the solution weighing container is a specified value, if so, performing a step S72, and if not, obtaining no mixture and performing operation again;
s72, starting a rotary driving device on the reactor, and driving the screw rod in the conveying cylinder to rotate by the rotary driving device;
s73, opening a second valve at the bottom of the solution weighing container, and putting the liquid substance into the top of the conveying cylinder through a second conveying pipe;
s74, opening a first valve at the bottom of the dry material weighing container, putting the solid matter into the middle of a conveying cylinder through a first conveying pipe, enabling the rotating liquid matter to be in contact with the solid matter through a screw and mixing the solid matter to obtain a mixture, and conveying the mixture into the reactor through the conveying cylinder;
and S75, pre-gelatinizing the mixture in a reactor to obtain a pre-gelatinized mixture.
Preferably, the time interval between the execution of step S73 and the execution of step S74 is 18 seconds to 22 seconds.
Compared with the prior art, the invention has the following beneficial effects:
through designing this disposal bag, the disposal bag can bear certain rubbish, and tensile dynamics is enough, also can be with rubbish degradation process together, greatly reduced rubbish post processing's the degree of difficulty, reduced wasting of refuse treatment, also reduced the national cost under the condition for the environment decompression, also made things convenient for people to carry out waste classification, do not need the hand to bump rubbish.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a cross-sectional view of a mixing system used in the present invention.
Reference numerals: the device comprises a workbench 11, an outer cylinder 12, a cylinder cover 13, a filter cylinder 14, a ball 15, a supporting ring 16, a motor 17, an opening and closing sheet 21, a mounting seat 22, a spring 23, a reaction tank 31, a dry material weighing container 32, a wet material weighing container 33, a rotary driving device 34, a screw 35, a stirring frame 36 and a conveying cylinder 37.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the functions of the invention clearer and easier to understand, the invention is further explained by combining the drawings and the detailed implementation mode:
the invention firstly provides a biodegradable garbage bag which comprises the following components in parts by mass:
solid matter: 300g of starch, 420g of polyethylene, 100g of ethylene-ethyl acrylate copolymer, 50g of sorbitol, 3g of stearic acid, 5g of calcium stearate and 15g of monoglyceride;
liquid substance: 100g of glycerol, 70g of diethylene glycol and 40g of water.
When the biodegradable garbage bag is produced by using the production process, a mixing system is needed.
As shown in fig. 1, the mixing system includes: ball mill, switching equipment, closing cap, high-speed mixer, direction fill and cylinder.
The ball mill comprises: the automatic filter comprises a workbench 11, an outer cylinder 12, a cylinder cover 13, a filter cylinder 14, spheres 15, a support ring 16 and a motor 17, wherein the outer cylinder 12 is installed on the workbench 11, the outer cylinder 12 is positioned above a high-speed mixer, the bottom of the outer cylinder 12 is of a funnel-shaped structure, one end of the outer cylinder 12 and one end of the filter cylinder 14 are both opened and closed through the cylinder cover 13, the filter cylinder 14 is arranged in the outer cylinder 12, two ends of the filter cylinder 14 are fixed to two support rings 16, the support rings 16 are in contact with the inner wall of the outer cylinder 12 to guide the rotation of the filter cylinder 14, the central line around which the filter cylinder 14 rotates is positioned in the horizontal direction, the end part of the filter cylinder 14, which is far away from the cylinder cover 13, the filter cylinder 14 is fixed to the output end of the motor 17, the motor 17 is installed on the outer cylinder 12 to drive the filter cylinder 14 to rotate, a gap is formed between the filter cylinder 14 and the inner wall of the outer cylinder 12, the bottom of the outer cylinder 12 is communicated with an output pipe which is an output pipe of a ball mill, a switching device is installed on the output pipe, the switching device is installed on the output pipe to switch the output pipe, a plurality of the spheres 15 are placed in the filter cylinder 14, meshes are opened and the filter cylinder 14, and the filter cylinder 14 are 180 meshes.
The opening and closing device includes: the opening and closing piece 21 is used for opening and closing the conveying pipe, the opening and closing piece 21 can move in the radial direction of the conveying pipe relative to the conveying pipe, the opening and closing piece 21 is fixed to the installation seat 22, a pulley is installed at the end, deviating from the opening and closing piece 21, of the installation seat 22 and can rotate, the pulley is tangent to the inner wall of the guide bucket, one end of the spring 23 is fixed relative to the installation seat 22, the other end of the spring 23 is fixed relative to the conveying pipe, and the opening and closing piece 21 can be kept to open the conveying pipe under the elastic force of the spring 23. The guide hopper is surrounded outside the conveying pipe, the large end of the guide hopper is positioned above the small end of the guide hopper, the guide hopper is fixed with the output end of the air cylinder, the air cylinder is fixed relative to the workbench 11, the air cylinder is used for lifting the guide hopper, and the bottom end of the guide hopper is fixed with a sealing cover.
The high-speed mixer includes: the device comprises a reaction tank 31, a dry material weighing container 32, a wet material weighing container 33, a rotary driving device 34, a screw 35, a stirring frame 36 and a conveying cylinder 37, wherein a reaction cavity is formed in the reaction tank 31, the dry material weighing container 32 and the wet material weighing container 33 are installed at the top of the reaction tank 31, the reaction tank 31 supports the dry material weighing container 32 through a first weigher, a first valve is installed at the bottom of the dry material weighing container 32, the reaction tank 31 supports the wet material weighing container 33 through a second weigher, a second valve is installed at the bottom of the wet material weighing container 33, the conveying cylinder 37 is fixed on the top wall of the reaction cavity, the rotary driving device 34 is installed on the top surface of the reaction tank 31, the output end of the rotary driving device 34 is connected to the screw 35, the screw 35 penetrates through the conveying cylinder 37, the bottom end of the screw 35 is connected to the stirring frame 36, the conveying cylinder 37 is arranged between the dry material weighing container 32 and the wet material weighing container 33, the bottom of the dry material weighing container 32 is communicated to the middle of the conveying cylinder 37 through the conveying cylinder 37, the wet material weighing container 33 is communicated to the top of the conveying cylinder 37 through the air pump through the second conveying cylinder, an annular heater is sleeved on the outer wall of the reaction tank 31, and an air pump is communicated with the outer wall of the reaction tank 31. A heating tank is arranged beside the reaction tank 31 and used for heating a second solution, the heating tank is communicated with the reaction cavity in the reaction tank 31 through a solution pump, and the heater, the air pump, the heating tank, the solution pump, the first weighing device, the second weighing device, the first valve and the second valve are all connected with the control box.
The guide hopper communicates the duct with the dry matter weighing container 32 through a closing cap for opening and closing the dry matter weighing container 32.
The invention also provides a production process of the biodegradable garbage bag, which comprises the following steps:
s1, starting an air cylinder, enabling a closing cover to be located at a position for closing a dry material weighing container 32, and opening and closing an output end of a ball mill by using opening and closing equipment under the elastic force of an elastic piece;
s2, putting starch into the filter cartridge 14 of the ball mill, starting the ball mill, enabling the fineness of the starch to reach 180 meshes, and enabling the starch to enter the output end of the ball mill, wherein a first weighing device at the dry material weighing container 32 weighs the total weight of the dry material weighing container 32 and the starch in real time to obtain the mass m of the starch in the dry material weighing container 32 (the dry material weighing container 32 is a known fixed value);
s3, judging whether M is equal to a specified value M (namely the amount of starch to be reached), and if so, performing a step S4; if not, continuing to execute the step S2;
s4, the closing cover and the guide hopper are lifted by the air cylinder, the dry material weighing container 32 is opened by the closing cover, and the output end of the ball mill is closed by the guide hopper extruding opening and closing equipment; in the step, the closing cover can be opened by starting one air cylinder, and the output end of the ball mill can be closed by the opening and closing equipment by lifting the guide hopper, so that the use of a power source is reduced, the use cost is reduced, the consumption of energy is reduced, and the environment is protected; meanwhile, the consistency of the opening of the dry material weighing container 32 and the closing of the output end of the ball mill is realized, the time waste caused by the execution of the two actions in tandem is avoided, and the operation efficiency is improved; meanwhile, the dry material weighing container 32 can be closed only when the output end of the ball mill is closed, the problem that the dry material weighing container 32 is opened to place other ingredients when the starch output by the output end of the ball mill is not weighed, and the mass of the starch entering the dry material weighing container 32 cannot be calculated is avoided, and the mass of the starch output by the output end of the weighing ball mill entering the dry material weighing container 32 is strictly guaranteed;
s5, putting solid substances except starch into the dry material weighing container 32, and keeping the mass ratio: polyethylene: ethylene-ethyl acrylate copolymer: sorbitol: stearic acid: calcium stearate: monoglyceride portion =420:100:50:3:5:15;
s6, putting the liquid material into the wet material weighing container 33, and keeping the mass ratio: 10 parts of glycerol, 7 parts of diethylene glycol and 4 parts of water;
s7, putting the solid substances and the liquid substances in the dry material weighing container 32 and the wet material weighing container 33 into a high-speed mixer, uniformly mixing, and performing pre-gelatinization to obtain a pre-gelatinized mixture;
s8, placing the pre-gelatinized mixture into a screw 35 extruder, and carrying out grafting reaction at 160-190 ℃ to obtain a reactant;
s9, filtering, extruding, granulating and blow-molding reactants at the temperature of 160-170 ℃ to obtain the biodegradable garbage bag.
Preferably, step S7 includes the steps of:
s71, judging whether the ratio of the mass of the dry materials in the dry material weighing container 32 to the mass of the first solution in the solution weighing container is a specified value, if so, performing a step S72, otherwise, obtaining no mixture and operating again; when the dry material weighing container 32 and the wet material weighing container 33 are placed, the mass ratio of the solid material to the liquid material is required to be ensured to be a designated value, and the judgment is carried out in the control box to ensure that the subsequent steps can be continued after the solid material and the liquid material are placed in proportion, otherwise, the subsequent steps can be continued only after the solid material and the liquid material are respectively transferred from the dry material weighing container 32 and the wet material weighing container 33 and are reweighed and configured;
s72, starting the rotary driving device 34 on the reactor, wherein the rotary driving device 34 drives the screw 35 in the conveying cylinder 37 to rotate;
s73, opening a second valve at the bottom of the solution weighing container, and putting the liquid substance into the top of the conveying cylinder 37 through a second conveying pipe;
s74, opening a first valve at the bottom of the dry material weighing container 32, putting the solid substances into the middle of the conveying cylinder 37 through a first conveying pipe, enabling the rotating liquid substances to be in contact with the solid substances and mixed by the screw 35 to obtain a mixture, and conveying the mixture into the reactor by the conveying cylinder 37;
and S75, pre-gelatinizing the mixture in a reactor to obtain a pre-gelatinized mixture.
The time interval between step S73 and step S74 is 18 seconds to 22 seconds to ensure that the liquid substance wets the delivery cylinder 37 before the solid substance enters the delivery cylinder 37.
The percentage of biodegradation of the biodegradable garbage bags obtained with the above formulation and process was tested according to GB-T19277-2003-determination of the final aerobic biodegradation and disintegration of the material under controlled composting conditions-using a test method which measures the released carbon dioxide, and also for normal garbage bags, the test results were as follows:
| number of days | The biodegradable garbage bag | Common garbage bag |
| 0 | 0 | 0 |
| 30 | 14.52 | 0 |
| 60 | 26.8 | 0 |
| 90 | 48.8 | 0 |
As can be seen from the determination, the biodegradable garbage bag has stronger biodegradable performance compared with the common garbage bag, can be slowly degraded, and is convenient for the garbage bag and wet garbage to be treated together.
The biodegradable and ordinary garbage bags were subjected to a tensile test according to GB-T17037,1-1997 with the following results:
| sample (I) | Tensile strength (Mpa) | Elongation at Break (%) |
| Biodegradable refuse bag | 38 | 600～750 |
| Common garbage bag | 60 | ＞900 |
As can be seen from the above table, although the tensile property of the biodegradable garbage bag is not as good as that of a common garbage bag, the biodegradable garbage bag can also meet the requirement of common bearing, and can be lifted after a certain amount of garbage is placed in the biodegradable garbage bag, so that the normal use is ensured.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (3)
1. A production process of a biodegradable garbage bag is characterized by comprising the following steps:
s1, starting an air cylinder, enabling a closing cover to be located at a position for closing a dry material weighing container, and opening and closing an output end of a ball mill by using opening and closing equipment under the elastic force of an elastic piece;
s2, putting starch into a filter cylinder of a ball mill, starting the ball mill to enable the fineness of the starch to reach 180 meshes, and enabling the starch to enter the output end of the ball mill, wherein a first weighing device at a dry material weighing container weighs the total weight of the dry material weighing container and the starch in real time to obtain the mass m of the starch in the dry material weighing container;
s3, judging whether M is equal to a specified value M, and if M is equal to the specified value M, performing a step S4; if not, continuing to execute the step S2;
s4, the closing cover and the guide hopper are lifted by the air cylinder, the dry material weighing container is opened by the closing cover, and the output end of the ball mill is closed by the guide hopper extruding opening and closing equipment;
s5, adding solid substances except starch into a dry material weighing container, and keeping the mass ratio: polyethylene: ethylene-ethyl acrylate copolymer: sorbitol: stearic acid: calcium stearate: monoglyceride portion =420:100:50:3:5:15;
s6, adding a liquid substance into the wet material weighing container, and keeping the mass ratio: 10 parts of glycerol, 7 parts of diethylene glycol and 4 parts of water;
s7, putting the solid substances and the liquid substances in the dry material weighing container and the wet material weighing container into a high-speed mixer, uniformly mixing, and performing pre-gelatinization to obtain a pre-gelatinized mixture;
s8, placing the pre-gelatinized mixture into a screw extruder, and carrying out grafting reaction at 160-190 ℃ to obtain a reactant;
s9, filtering, extruding, granulating and blow-molding reactants at the temperature of 160-170 ℃ to obtain the biodegradable garbage bag.
2. The process for producing a biodegradable garbage bag according to claim 1, characterized in that step S7 comprises the steps of:
s71, judging whether the ratio of the mass of the dry materials in the dry material weighing container to the mass of the first solution in the solution weighing container is a specified value, if so, performing a step S72, and if not, obtaining no mixture and performing operation again;
s72, starting a rotary driving device on the reactor, and driving the screw rod in the conveying cylinder to rotate by the rotary driving device;
s73, opening a second valve at the bottom of the solution weighing container, and putting the liquid substance into the top of the conveying cylinder through a second conveying pipe;
s74, opening a first valve at the bottom of the dry material weighing container, putting the solid matter into the middle of a conveying cylinder through a first conveying pipe, enabling the rotating liquid matter to be in contact with the solid matter through a screw and mixing the solid matter to obtain a mixture, and conveying the mixture into the reactor through the conveying cylinder;
and S75, pre-gelatinizing the mixture in a reactor to obtain a pre-gelatinized mixture.
3. The process according to claim 2, wherein steps S73 and S74 are carried out at a time interval of 18 to 22 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111541050.7A CN114015145B (en) | 2019-12-30 | 2019-12-30 | Production process of biodegradable garbage bag |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111541050.7A CN114015145B (en) | 2019-12-30 | 2019-12-30 | Production process of biodegradable garbage bag |
| CN201911393272.1A CN111019226A (en) | 2019-12-30 | 2019-12-30 | Biodegradable garbage bag and production process thereof |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911393272.1A Division CN111019226A (en) | 2019-12-30 | 2019-12-30 | Biodegradable garbage bag and production process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114015145A CN114015145A (en) | 2022-02-08 |
| CN114015145B true CN114015145B (en) | 2023-01-03 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
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| CN202111541050.7A Active CN114015145B (en) | 2019-12-30 | 2019-12-30 | Production process of biodegradable garbage bag |
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| CN111019226A (en) | 2020-04-17 |
| CN114015145A (en) | 2022-02-08 |
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