CN117962382A - Production method of plastic woven bag with high toughness - Google Patents
Production method of plastic woven bag with high toughness Download PDFInfo
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- CN117962382A CN117962382A CN202410113117.4A CN202410113117A CN117962382A CN 117962382 A CN117962382 A CN 117962382A CN 202410113117 A CN202410113117 A CN 202410113117A CN 117962382 A CN117962382 A CN 117962382A
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- 239000002994 raw material Substances 0.000 claims abstract description 42
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- 239000002657 fibrous material Substances 0.000 claims abstract description 31
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of plastic woven bags, and discloses a production method of a plastic woven bag with high toughness, wherein the woven bag comprises the following production steps: step one, raw material preparation; step two, putting the materials into an extruder, heating and melting the materials to enable the materials to be molten, and adding fiber materials into the materials; step three, fully mixing the molten raw material and the fiber material by using stirring equipment, and extruding the molten plastic into a continuous plastic film by the extrusion action of an extruder; heating and embossing high-density polyethylene fiber lines on a roller or a roller of the extruder in the process of extruding and forming the plastic film by the extruder, and fusing the high-density polyethylene fiber lines into the plastic film; step five, cooling the extruded plastic film, feeding the cooled plastic film into a stretching machine, and spraying elastomer coating on the plastic film in the stretching process; step six, the stretched plastic film is woven into a plastic woven fabric through a braiding machine, and the woven plastic film is formed through a sewing machine or a heat sealing machine.
Description
Technical Field
The invention relates to the technical field of plastic woven bags, in particular to a production method of a plastic woven bag with high toughness.
Background
The plastic woven bag is made up by using polypropylene (PP) and Polyethylene (PE) resin as main raw materials, adding a small quantity of auxiliary material, uniformly mixing them, melting them by means of extruder, extruding plastic film, cutting it into filaments, stretching them at a temp. lower than melting temperature of resin, making it into high-strength low-elongation flat filaments by means of molecular orientation and heat-setting, then making it pass through such processes of winding, weaving, cutting and sewing so as to obtain the invented plastic woven bag. The plastic woven bags are divided into TA type, A type, B type and C type according to the loading mass range, wherein the TA type is the allowable loading mass of 10-20 kg, the A type is the allowable loading mass of 21-30 kg, the B type is the allowable loading mass of 31-50 kg, and the C type is the allowable loading mass of 51-60 kg. The plastic woven bag has the advantages of being smooth, high in tensile strength, convenient to package, corrosion-resistant, free of water absorption and mildew, convenient to assemble, disassemble, stack, carry and store and the like, is suitable for packaging powdery and flexible products such as chemical raw materials, fertilizers, cements, foods, novel building materials and the like, is the most widely used packaging product in the current market, and can be seen in the periodical period with respect to introduction of the plastic woven bag: tan Yunfang several ways to improve the tensile load index of plastic woven bags.science and technology and enterprise.2014 (07).
Through searching a plastic woven bag with strong toughness and the prior art publication number of CN 111218049A, the plastic woven bag comprises a woven layer, an inner core layer and an elastic bag; the inner side of the braiding layer is fixedly attached to the outer surfaces of the two sides of the inner core layer; the middle part of the inner core layer is uniformly and fixedly provided with an elastic bag, and the middle part of the inner core layer is provided with an extrusion cavity; the wall thickness of the two ends of the elastic bag is thinner than that of the upper side and the lower side, and the elastic bag is arranged in the extrusion cavity; the invention is mainly used for modifying the production process by taking polypropylene as a base material, scientifically compounding the modified carbon nano tube which can obviously improve the relative tensile load, impact strength, toughness and elastic modulus of the plastic woven bag, can obviously improve the impact resistance of the plastic woven bag, is easy to biodegrade, reduces the production cost, can greatly improve the polyethylene/winter rye peptide compound of the low temperature resistance of the plastic woven bag, and can effectively improve the lubricity and toughness of the plastic woven bag.
Although the above technical solution realizes toughness enhancement by adding polypropylene and improving the production process, the polypropylene is still affected by oxidation, and the polypropylene itself is used as a raw material of a plastic woven bag, and is not inventive.
Disclosure of Invention
(One) solving the technical problems
Aiming at the defects of the prior art, the invention provides a production method of a plastic woven bag with strong toughness, which has the advantages of strong toughness, quicker recovery when being stretched, difficult fracture of the plastic woven bag and the like, and solves the problems of the prior art.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: the production method of the plastic woven bag with high toughness comprises the following production steps:
Step one, raw material preparation: preparing raw materials respectively in proportion, wherein the raw materials comprise polyamide, polyamidoalcohol, polypropylene and polyethylene;
Step two, putting the materials into an extruder, heating and melting the materials to enable the materials to be molten, and adding fiber materials into the materials;
step three, fully mixing the molten raw material and the fiber material by using stirring equipment, and extruding the molten plastic into a continuous plastic film by the extrusion action of an extruder;
heating and embossing high-density polyethylene fiber lines on a roller or a roller of the extruder in the process of extruding and forming the plastic film by the extruder, and fusing the high-density polyethylene fiber lines into the plastic film;
Step five, cooling the extruded plastic film, feeding the cooled plastic film into a stretching machine, and spraying elastomer coating on the plastic film in the stretching process;
step six, the stretched plastic film is woven into a plastic woven fabric through a braiding machine, and the woven plastic film is formed through a sewing machine or a heat sealing machine.
Preferably, in the first step, the weight ratio of the raw materials is as follows: 20% -40% of polyvinyl amide, 30% -50% of polyamide alcohol, 3% -7% of polypropylene and 10% -15% of polyethylene, wherein the purity of the polyvinyl amide is more than or equal to 99%, the purity of the polyamide alcohol is more than or equal to 99%, and the purity of the polypropylene and the purity of the polyethylene are more than or equal to 99%.
Preferably, the raw materials in the first step further comprise an antioxidant for preventing the plastics from losing mechanical properties due to oxidation during processing and use; the heat stabilizer is used for improving the stability of the plastic in a high-temperature environment; the antistatic agent is used for reducing the generation of static electricity on the surface of the plastic, so that dust absorption and appearance influence are avoided; the ultraviolet inhibitor is used for resisting corrosion of ultraviolet rays and prolonging the service life; the color master batch is used for dyeing; the functional filler is used for improving the mechanical property and the processing property of the plastic.
Preferably, the total amount of the antioxidant, the heat stabilizer, the antistatic agent, the ultraviolet inhibitor, the color master batch and the functional filler is 3%.
Preferably, the melting the raw material in the second step further includes the following steps:
S1.1, adding raw materials such as pre-prepared polyamide, polyamide alcohol, polypropylene, polyethylene and the like into a feeding port of an extruder according to a formula proportion;
S1.2, starting a heating system of the extruder to set the temperature to 120 ℃ so as to gradually heat and melt the raw materials;
s1.3, when the raw materials begin to melt, adding pretreated fiber materials into an extruder;
S1.4, using stirring or a nozzle, ensuring that the fiber material is uniformly dispersed in the molten plastic.
Preferably, the fibrous material comprises polyamide fibers, polyacrylamide fibers, polyethylene fibers, carbon nanofibers, and natural fibers, including wood fibers, flax fibers, and hemp fibers.
Preferably, the third step further comprises the following detailed steps:
S2.1, introducing the molten plastic and the pretreated fiber material in the extruder in the second step into a feed of a stirring device;
s2.2, starting stirring equipment, enabling a stirrer to rotate and a scraper to move, and fully mixing the molten plastic and the fiber material;
S2.3, uniformly dispersing the fiber material in the molten plastic through stirring motion, so as to ensure that the fiber and the plastic are fully contacted and bonded;
S2.4, opening a discharge port of the stirring device, introducing the mixture into a feed port connected to an extruder, and extruding molten plastic from an extrusion head of the extruder through extrusion;
s2.5, arranging a cooling fan, a cooler or cooling water at the outlet of the extruder to cool the extruded plastic film rapidly and solidify.
Preferably, the fourth step further comprises the following detailed steps:
S3.1, arranging an introducing device on a roller or a roller of the extruder so as to ensure that the high-density polyethylene fiber line can smoothly enter the extruder;
S3.2, ensuring that the introduction speed of the fiber line is lower than 5cm/S and the position is in the central line;
s3.3, extruding the plastic film from an extrusion head of the extruder, and passing through a roller or a roller of the extruder;
S3.4, contacting the high-density polyethylene fiber line with the plastic film through a heated roller or a roller, and applying pressure so as to enable the fiber line to be fused into the plastic film;
s3.5, arranging cooling equipment at the outlet of the extruder, and rapidly cooling and solidifying the extruded plastic film.
Preferably, the pressure value in S3.4 is 10/Pa per square centimeter.
Preferably, the cooling device in S3.5 includes, for example, a cooling fan, a cooler, or a cooling water tank.
Compared with the prior art, the invention provides a production method of a plastic woven bag with strong toughness, which has the following beneficial effects:
1. According to the invention, the proportion of polyamide and polyethylene amide which are high in the raw materials of the woven bag is high, the polyamide and the polyethylene amide are high molecular compounds, have extremely strong molecular bond structures, can provide the toughness required by the woven bag, and according to the second step, fiber materials are added into the molten raw materials, and the addition of the fiber materials can enhance the toughness of the plastic woven bag, so that the polyamide fiber, the polyacrylamide fiber, the polyethylene fiber, the carbon nanofiber and the natural fiber (such as wood fiber, flax fiber and hemp fiber) can increase the strength and toughness of the plastic, the plastic woven bag can bear certain stretching and impact force, and the beneficial effect of strong toughness of the plastic woven bag is achieved.
2. According to the invention, in the production method of the plastic woven bag, the elastomer coating added in the fifth step has the effect of enabling the bag to recover faster after being stretched. The coating can provide elasticity and resilience, so that the bag can recover to the original shape more quickly when being stretched, thereby enhancing the durability and the service life of the plastic woven bag and achieving the beneficial effect of recovering more quickly when being stretched.
3. In the fifth step, the elastic coating is sprayed on the plastic film in the stretching process of the plastic film. The addition of the elastomer coating can increase the elasticity of the plastic woven bag, improve the stretch resistance of the plastic woven bag and achieve the beneficial effect that the plastic woven bag is not easy to break.
Drawings
FIG. 1 is a schematic flow chart of the present invention;
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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 be within the scope of the invention.
Referring to fig. 1, a method for producing a tough plastic woven bag, the woven bag comprises the following steps:
Step one, raw material preparation: preparing raw materials respectively in proportion, wherein the raw materials comprise polyamide, polyamidoalcohol, polypropylene and polyethylene;
Step two, putting the materials into an extruder, heating and melting the materials to enable the materials to be molten, and adding fiber materials into the materials;
step three, fully mixing the molten raw material and the fiber material by using stirring equipment, and extruding the molten plastic into a continuous plastic film by the extrusion action of an extruder;
heating and embossing high-density polyethylene fiber lines on a roller or a roller of the extruder in the process of extruding and forming the plastic film by the extruder, and fusing the high-density polyethylene fiber lines into the plastic film;
Step five, cooling the extruded plastic film, feeding the cooled plastic film into a stretching machine, and spraying elastomer coating on the plastic film in the stretching process;
step six, the stretched plastic film is woven into a plastic woven fabric through a braiding machine, and the woven plastic film is formed through a sewing machine or a heat sealing machine.
Specifically, the weight ratio of the raw materials in the first step is as follows: 20% -40% of polyvinyl amide, 30% -50% of polyamide alcohol, 3% -7% of polypropylene and 10% -15% of polyethylene, wherein the purity of the polyvinyl amide is more than or equal to 99%, the purity of the polyamide alcohol is more than or equal to 99%, and the purity of the polypropylene and the purity of the polyethylene are more than or equal to 99%.
Through the technical scheme, the polyethylene amide and the polyamide alcohol are used as one of main components of the plastic woven bag, have higher molecular weight and strength, and can increase the mechanical properties of the bag. By controlling the proportion and purity of the raw materials, the plastic woven bag can be ensured to have enough strength and toughness, and the requirements in practical application are met.
Specifically, the raw materials in the first step also comprise an antioxidant for preventing the plastics from losing mechanical properties due to oxidation in the processing and using processes; the heat stabilizer is used for improving the stability of the plastic in a high-temperature environment; the antistatic agent is used for reducing the generation of static electricity on the surface of the plastic, so that dust absorption and appearance influence are avoided; the ultraviolet inhibitor is used for resisting corrosion of ultraviolet rays and prolonging the service life; the color master batch is used for dyeing; the functional filler is used for improving the mechanical property and the processing property of the plastic.
Through the technical scheme, the anti-oxidant, the heat stabilizer and the ultraviolet inhibitor can improve the weather resistance and the stability of the plastic woven bag in the processing and using processes, the service life of the bag is prolonged, the appearance of the plastic woven bag can be improved by adding the anti-static agent and the color master batch, and the influence of static electricity generation on the plastic surface is reduced.
Specifically, the total amount of the antioxidant, the heat stabilizer, the antistatic agent, the ultraviolet inhibitor, the color master batch and the functional filler is 3 percent.
Specifically, the melting raw materials in the second step further comprises the following steps:
S1.1, adding raw materials such as pre-prepared polyamide, polyamide alcohol, polypropylene, polyethylene and the like into a feeding port of an extruder according to a formula proportion;
S1.2, starting a heating system of the extruder to set the temperature to 120 ℃ so as to gradually heat and melt the raw materials;
s1.3, when the raw materials begin to melt, adding pretreated fiber materials into an extruder;
S1.4, using stirring or a nozzle, ensuring that the fiber material is uniformly dispersed in the molten plastic.
According to the technical scheme, raw materials such as the polyamide, the polyamide alcohol, the polypropylene and the polyethylene are added into the feeding port of the extruder according to the formula proportion, and the pretreated fiber materials are added in the gradual heating and melting process, so that the uniform mixing of the raw materials can be realized, the full fusion of different components in the raw materials is ensured, the fiber materials are uniformly dispersed in the plastic, the quality and the performance of a final product are improved, and the temperature control of the raw materials is realized by starting the heating system of the extruder and setting the temperature of 120 ℃.
Specifically, the fiber material includes polyamide fiber, polyacrylamide fiber, polyethylene fiber, carbon nanofiber and natural fiber, and the natural fiber includes wood fiber, flax fiber and hemp fiber.
The addition of the fiber material increases mechanical properties such as strength, toughness, wear resistance and the like in the plastic woven bag, and the polyamide fiber, the polyacrylamide fiber and the polyethylene fiber have high strength and high toughness, so that the bearing capacity and durability of the plastic woven bag can be effectively improved, and the polyethylene fiber, the carbon nanofiber and the natural fiber have relatively low density, so that the strength and the rigidity of the plastic are increased under the condition of not increasing the weight.
Specifically, the third step further comprises the following detailed steps:
S2.1, introducing the molten plastic and the pretreated fiber material in the extruder in the second step into a feed of a stirring device;
s2.2, starting stirring equipment, enabling a stirrer to rotate and a scraper to move, and fully mixing the molten plastic and the fiber material;
S2.3, uniformly dispersing the fiber material in the molten plastic through stirring motion, so as to ensure that the fiber and the plastic are fully contacted and bonded;
S2.4, opening a discharge port of the stirring device, introducing the mixture into a feed port connected to an extruder, and extruding molten plastic from an extrusion head of the extruder through extrusion;
s2.5, arranging a cooling fan, a cooler or cooling water at the outlet of the extruder to cool the extruded plastic film rapidly and solidify.
Specifically, the fourth step further comprises the following detailed steps:
S3.1, arranging an introducing device on a roller or a roller of the extruder so as to ensure that the high-density polyethylene fiber line can smoothly enter the extruder;
S3.2, ensuring that the introduction speed of the fiber line is lower than 5cm/S and the position is in the central line;
s3.3, extruding the plastic film from an extrusion head of the extruder, and passing through a roller or a roller of the extruder;
S3.4, contacting the high-density polyethylene fiber line with the plastic film through a heated roller or a roller, and applying pressure so as to enable the fiber line to be fused into the plastic film;
s3.5, arranging cooling equipment at the outlet of the extruder, and rapidly cooling and solidifying the extruded plastic film.
Specifically, the pressure value in S3.4 is 10/Pa per square centimeter.
Specifically, the cooling device in S3.5 includes, for example, a cooling fan, a cooler, or a cooling water tank.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The production method of the plastic woven bag with high toughness is characterized in that the woven bag comprises the following production steps:
Step one, raw material preparation: preparing raw materials respectively in proportion, wherein the raw materials comprise polyamide, polyamidoalcohol, polypropylene and polyethylene;
Step two, putting the materials into an extruder, heating and melting the materials to enable the materials to be molten, and adding fiber materials into the materials;
step three, fully mixing the molten raw material and the fiber material by using stirring equipment, and extruding the molten plastic into a continuous plastic film by the extrusion action of an extruder;
heating and embossing high-density polyethylene fiber lines on a roller or a roller of the extruder in the process of extruding and forming the plastic film by the extruder, and fusing the high-density polyethylene fiber lines into the plastic film;
Step five, cooling the extruded plastic film, feeding the cooled plastic film into a stretching machine, and spraying elastomer coating on the plastic film in the stretching process;
step six, the stretched plastic film is woven into a plastic woven fabric through a braiding machine, and the woven plastic film is formed through a sewing machine or a heat sealing machine.
2. The method for producing the plastic woven bag with strong toughness according to claim 1, wherein the method comprises the following steps: the weight ratio of the raw materials in the first step is as follows: 20% -40% of polyvinyl amide, 30% -50% of polyamide alcohol, 3% -7% of polypropylene and 10% -15% of polyethylene, wherein the purity of the polyvinyl amide is more than or equal to 99%, the purity of the polyamide alcohol is more than or equal to 99%, and the purity of the polypropylene and the purity of the polyethylene are more than or equal to 99%.
3. The method for producing the plastic woven bag with strong toughness according to claim 1, wherein the method comprises the following steps: the raw materials in the first step also comprise an antioxidant for preventing the plastics from losing mechanical properties due to oxidation in the processing and using processes; the heat stabilizer is used for improving the stability of the plastic in a high-temperature environment; the antistatic agent is used for reducing the generation of static electricity on the surface of the plastic, so that dust absorption and appearance influence are avoided; the ultraviolet inhibitor is used for resisting corrosion of ultraviolet rays and prolonging the service life; the color master batch is used for dyeing; the functional filler is used for improving the mechanical property and the processing property of the plastic.
4. A method of producing a tough plastic woven bag according to claim 3, characterized by: the total amount of the antioxidant, the heat stabilizer, the antistatic agent, the ultraviolet screening agent, the color master batch and the functional filler is 3 percent.
5. The method for producing the plastic woven bag with strong toughness according to claim 1, wherein the method comprises the following steps: the melting raw materials in the second step further comprises the following steps:
S1.1, adding raw materials such as pre-prepared polyamide, polyamide alcohol, polypropylene, polyethylene and the like into a feeding port of an extruder according to a formula proportion;
S1.2, starting a heating system of the extruder to set the temperature to 120 ℃ so as to gradually heat and melt the raw materials;
s1.3, when the raw materials begin to melt, adding pretreated fiber materials into an extruder;
S1.4, using stirring or a nozzle, ensuring that the fiber material is uniformly dispersed in the molten plastic.
6. The method for producing the plastic woven bag with strong toughness according to claim 5, wherein the method comprises the following steps: the fiber material includes polyamide fibers, polyacrylamide fibers, polyethylene fibers, carbon nanofibers, and natural fibers including wood fibers, flax fibers, and hemp fibers.
7. The method for producing the plastic woven bag with strong toughness according to claim 1, wherein the method comprises the following steps: the third step further comprises the following detailed steps:
S2.1, introducing the molten plastic and the pretreated fiber material in the extruder in the second step into a feed of a stirring device;
s2.2, starting stirring equipment, enabling a stirrer to rotate and a scraper to move, and fully mixing the molten plastic and the fiber material;
S2.3, uniformly dispersing the fiber material in the molten plastic through stirring motion, so as to ensure that the fiber and the plastic are fully contacted and bonded;
S2.4, opening a discharge port of the stirring device, introducing the mixture into a feed port connected to an extruder, and extruding molten plastic from an extrusion head of the extruder through extrusion;
s2.5, arranging a cooling fan, a cooler or cooling water at the outlet of the extruder to cool the extruded plastic film rapidly and solidify.
8. The method for producing the plastic woven bag with strong toughness according to claim 1, wherein the method comprises the following steps: the fourth step further comprises the following detailed steps:
S3.1, arranging an introducing device on a roller or a roller of the extruder so as to ensure that the high-density polyethylene fiber line can smoothly enter the extruder;
S3.2, ensuring that the introduction speed of the fiber line is lower than 5cm/S and the position is in the central line;
s3.3, extruding the plastic film from an extrusion head of the extruder, and passing through a roller or a roller of the extruder;
S3.4, contacting the high-density polyethylene fiber line with the plastic film through a heated roller or a roller, and applying pressure so as to enable the fiber line to be fused into the plastic film;
s3.5, arranging cooling equipment at the outlet of the extruder, and rapidly cooling and solidifying the extruded plastic film.
9. The method for producing the plastic woven bag with strong toughness according to claim 8, wherein the method comprises the following steps: the pressure value in S3.4 is 10/Pa per square centimeter.
10. The method for producing the plastic woven bag with strong toughness according to claim 8, wherein the method comprises the following steps: the S3.5 cooling device comprises, for example, a cooling fan, a cooler or a cooling water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410113117.4A CN117962382A (en) | 2024-01-25 | 2024-01-25 | Production method of plastic woven bag with high toughness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410113117.4A CN117962382A (en) | 2024-01-25 | 2024-01-25 | Production method of plastic woven bag with high toughness |
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