CN111019226A

CN111019226A - Biodegradable garbage bag and production process thereof

Info

Publication number: CN111019226A
Application number: CN201911393272.1A
Authority: CN
Inventors: 周久寿; 李骏
Original assignee: Chongqing Lianfa Plastic Technology Co Ltd
Current assignee: Chongqing Lianfa Plastic Technology Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-04-17
Also published as: CN114015145A; CN114015145B

Abstract

The invention provides a biodegradable garbage bag and a production process thereof, wherein the production process of the biodegradable garbage bag 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 the dry material weighing container; s2, putting starch into a filter cylinder of a ball mill, starting the ball mill to enable the starch to enter the output end of the ball mill after the fineness of the starch reaches 180 meshes, and weighing the total weight of a dry material weighing container and the starch in real time by a first weighing device at the dry material weighing container to obtain the mass m of the starch in the dry material weighing container; s3, judging whether M is equal to the appointed value M, if yes, executing 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 squeezing 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

Biodegradable garbage bag and production process thereof

Technical Field

The invention relates to a film, in particular to a biodegradable garbage bag and a production process thereof.

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, 25 and 2019, the classification system of the domestic garbage enters the method.

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 biodegradable garbage bag and a production process thereof, and solves the problem that the garbage bag and garbage cannot be degraded together in the prior art.

In order to achieve 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 substance: 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 located at a position for closing the dry material weighing container through the air cylinder, and opening and closing the output end of the ball mill through 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 starch to enter the output end of the ball mill after the fineness of the starch reaches 180 meshes, and weighing the total weight of a dry material weighing container and the starch in real time by a first weighing device at the dry material weighing container to obtain the mass m of the starch in the dry material weighing container;

s3, judging whether M is equal to the appointed value M, if yes, executing 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 the dry material weighing container, and keeping the mass ratio: polyethylene: ethylene-ethyl acrylate copolymer: sorbitol: stearic acid: calcium stearate: monoglyceride 420: 100: 50: 3: 5: 15;

s6, putting the liquid material 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, and uniformly mixing to complete pre-gelatinization to obtain a pre-gelatinization 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 the reactant at 160-170 ℃, extruding and granulating, and blow-molding 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, otherwise, obtaining no mixture and operating 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 material into the middle of a conveying cylinder through a first conveying pipe, contacting and mixing the rotating liquid material and the solid material by a screw to obtain a mixture, and conveying the mixture into the reactor by 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 support 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:

solid substance: 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 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 ball mill comprises a workbench 11, an outer cylinder 12, a cylinder cover 13, a filter cylinder 14, a ball 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 with the output end of the motor 17, the motor 17 is installed on the outer cylinder 12 to drive the rotation of, to open and close the output pipe, a plurality of balls 15 are placed in the filter cartridge 14, the filter cartridge 14 is provided with screen holes, and the filter cartridge 14 is 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. 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: 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 arranged 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 passes 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, the wet material weighing container 33 is communicated to the top of the conveying cylinder 37 through a second conveying pipe, the annular heater is sleeved on the outer wall of the reaction tank 31, and the air pump is communicated with 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 delivery pipe with the dry matter weighing container 32 through a closing cover for opening and closing the dry matter weighing container 32.

s1, starting an air cylinder, enabling a closing cover to be located at a position for closing the dry material weighing container 32, and opening and closing the output end of the ball mill by the 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 to enable the starch to enter the output end of the ball mill after the fineness of the starch reaches 180 meshes, and weighing the total weight of the dry material weighing container 32 and the starch in real time by the first weighing device at the dry material weighing container 32 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 the designated value M (namely the amount of starch to be reached), if so, executing a step S4; if not, continuing to execute the step S2;

s4, the cylinder lifts the closing cover and the guide hopper, the closing cover opens the dry material weighing container 32, and the guide hopper extrudes the opening and closing equipment to close the output end of the ball mill; 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 energy consumption 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, so that 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, 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 ensured;

s5, charging solid substances other than starch into the dry material weighing container 32, and maintaining the mass ratio: polyethylene: ethylene-ethyl acrylate copolymer: sorbitol: stearic acid: calcium stearate: monoglyceride 420: 100: 50: 3: 5: 15;

s6, the liquid material is put into the wet material weighing container 33, and 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, and uniformly mixing to complete pre-gelatinization to obtain a pre-gelatinization mixture;

s8, placing the pre-gelatinized mixture into a screw 35 extruder, and carrying out grafting reaction at 160-190 ℃ to obtain a reactant;

Preferably, step S7 includes the steps of:

s71, judging whether the ratio of the dry material mass in the dry material weighing container 32 to the first solution mass in the solution weighing container is a specified value, if so, performing the step S72, and if not, 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 material into the middle of the conveying cylinder 37 through a first conveying pipe, contacting and mixing the rotating liquid material and the solid material by the screw 35 to obtain a mixture, and conveying the mixture into the reactor by the conveying cylinder 37;

The time interval between the step S73 and the 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 biodegradable refuse bags obtained with the above formulation and process were tested for the percentage of biological decomposition according to GB-T19277-2003-determination of the final aerobic biological decomposition and disintegration capacity of the material under controlled composting conditions-test methods using the method for determining the carbon dioxide released, and also for ordinary refuse 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

1. The biodegradable garbage bag is characterized by comprising the following components in parts by mass:

2. A production process of a biodegradable garbage bag is characterized by comprising the following steps:

3. The process for producing a biodegradable garbage bag according to claim 2, characterized in that step S7 comprises the steps of:

4. The process for producing biodegradable garbage bags according to claim 3, characterized in that the time interval between step S73 and step S74 is 18 seconds to 22 seconds.