CN113752585A - Direct-spraying PP (propene Polymer) process for reducing glue layer of plastic box - Google Patents
Direct-spraying PP (propene Polymer) process for reducing glue layer of plastic box Download PDFInfo
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- CN113752585A CN113752585A CN202110971418.7A CN202110971418A CN113752585A CN 113752585 A CN113752585 A CN 113752585A CN 202110971418 A CN202110971418 A CN 202110971418A CN 113752585 A CN113752585 A CN 113752585A
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- direct
- composite material
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- plastic box
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Classifications
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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
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
Abstract
The invention discloses a direct-pouring PP (polypropylene) process for reducing a glue layer of a plastic box, belonging to the technical field of direct-pouring PP and comprising the following steps of: preparing raw materials; the invention can effectively ensure the quality and the environmental protection of products by arranging the melt layering step in the process and controlling the multilayer coextrusion by the layered flow-dividing device to realize the multilayer or single-layer direct-spraying composite material, abandons the traditional process of forming a composite material layer by glue, and simultaneously, the invention is provided with the material corona treatment and the roller passing process in the process, can effectively improve the surface tension and the adsorption force of the direct-spraying composite material for the corona treatment of the composite material, improves the quality of the direct-spraying composite material, and simultaneously improves the ductility and the quality of a produced plastic box.
Description
Technical Field
The invention belongs to the technical field of direct-spraying PP (polypropylene), and particularly relates to a direct-spraying PP process for reducing a glue layer of a plastic box.
Background
PP is an industrial material, and is a polymer obtained by addition polymerization of propylene. The PP material is a white waxy material, has transparent and light appearance, is widely applied to the fields of fiber products such as clothes, blankets and the like, medical instruments and the like, and is also used for packaging food and medicines, and the importance of the PP material is obviously that a direct-spraying PP process is sometimes required to be utilized in the production.
Chinese patent (CN202110381331.4) discloses a PP (polypropylene) laminated paper container capable of being used for microwave and a processing technology thereof, the PP laminated layer designed by the technology utilizes the characteristic that the melting point of the PP laminated layer is higher than the temperature required by food heating, so that the possibility that the laminated layer of the paper container is melted and damaged in the microwave heating process is reduced, namely, better isolation and strength can be still kept in the microwave heating process; the container wall and the adhesion between the container wall and the container bottom are all adhered through the PP film coating layer, so that the adhesion performance can be still kept under the high-temperature condition of microwave heating, and the paper container can still keep stable structure under the microwave heating environment; carry out the structure through PP enhancement layer to container wall and container end bonding position and strengthen, in order to overcome the shortcoming of the easy seepage of paper container wall and container end bonding position, make the whole good isolated performance that has of paper container, but this technology is not provided with the layering step, thereby can't form and drench combined material directly, thereby when carrying out production, need utilize the glue layer to remove to form the material composite bed, the feature of environmental protection is not good, product quality can't be ensured simultaneously, and simultaneously, be not provided with the corona process in the technology, can't improve and drench combined material's surface tension and adsorption affinity directly, improve and drench combined material quality directly, the box quality is not good to the moulding that leads to producing, need carry out certain improvement.
Disclosure of Invention
The invention aims to: the direct-spraying PP process for reducing the glue layer of the plastic box is provided for solving the problems that the traditional PP processing process is not provided with a layering step, so that a direct-spraying composite material cannot be formed, a glue layer is required to be utilized to form a material composite layer during production, the environmental protection performance is poor, the product quality cannot be guaranteed, meanwhile, a corona process is not arranged in the process, the surface tension and the adsorption force of the direct-spraying composite material cannot be improved, the quality of the direct-spraying composite material is improved, and the quality of the produced plastic box is poor.
In order to achieve the purpose, the invention adopts the following technical scheme: a direct-spraying PP process for reducing a glue layer of a plastic box comprises the following steps:
s1, preparing raw materials;
s2, taking out the PE, placing the PE in a stirring and melting device, increasing the temperature to melt the PE, adding quantitative antioxidant and antibacterial agent into the solution in the molten state, and stirring at a constant speed;
s3, stopping stirring after a period of time, standing for a period of time, and carrying out heat preservation and layering;
s4, placing the PP material in a direct spraying device, increasing the temperature to melt the PP, adding quantitative antioxidant and antibacterial agent into the molten solution, and stirring at a constant speed;
s5, stopping stirring after a period of time, standing for a period of time again, and carrying out heat preservation and layering;
s6, placing the melt in the heat-insulating S3 into an extruder, keeping the temperature in the extruder, guiding the melt out onto a cast sheet through a plurality of extrusion ports in a layered and shunting manner at a certain speed, and forming the cooling liquid;
s7, after cooling and forming, opening a direct pouring device to carry out layered direct pouring on the molten PP, and uniformly paving the PP solution which is directly poured on the forming body in the S6;
s8, cooling and forming the PP waiting for direct spraying;
s9, after forming, taking down the direct-spraying composite material, carrying out corona treatment, and after corona, placing the direct-spraying composite material on a roll shaft at a certain temperature for roll processing;
s10, taking down the corona-treated direct-spraying composite material, and carrying out size scribing and slitting treatment on the direct-spraying composite material according to requirements;
s11, placing the cut direct-spraying composite material on a polishing device, keeping a certain rotating speed, and performing surface polishing treatment on the direct-spraying composite material;
and S12, after treatment, rolling and storing the direct-spraying composite material.
As a further description of the above technical solution:
in the S1, the raw materials comprise PE, PP, soybean oil, an antioxidant, an antibacterial agent and a dispersing agent.
As a further description of the above technical solution:
in the S2, the PE is taken out and placed in a vibration melting device, the temperature is raised to 130-150 ℃ to melt the PE, meanwhile, quantitative antioxidant and antibacterial agent are added into the solution in the molten state, and stirring is carried out at the speed of 200-300 r/min.
As a further description of the above technical solution:
and in the step S3, stopping stirring after 10-15min, standing for 20-30min, and carrying out heat preservation and layering.
As a further description of the above technical solution:
in the S4, the PP material is placed in a direct spraying device, the temperature is raised to 200-220 ℃ to melt the PP, and meanwhile, quantitative antioxidant and antibacterial agent are added into the molten solution, and stirring is carried out at the speed of 200-300 r/min.
As a further description of the above technical solution:
and in the step S5, after 20-25min, stopping stirring, standing for 30-45min again, and carrying out heat preservation and layering.
As a further description of the above technical solution:
in the S6, the melt in the heat-preserving S3 is placed in an extruder, the temperature in the extruder is kept to be 100-120 ℃, the melt is led out to a cast sheet by layered flow distribution at the speed of 0.5-0.8m/min, and the cooling liquid is formed.
As a further description of the above technical solution:
in S7, after cooling and molding, the direct pouring device is turned on to layer the molten PP through the splitter and directly pour the molten PP, so that the directly poured PP solution is uniformly spread on the molded article in S6.
As a further description of the above technical solution:
and S9, after molding, taking down the direct-spraying composite material, carrying out corona treatment, and after corona, placing the direct-spraying composite material on a roller shaft at 25-35 ℃ for roll processing.
As a further description of the above technical solution:
in the step S11, the cut directly-sprayed composite material is placed on a polishing device, the rotation speed of 1200-1600r/min is maintained, and the surface of the directly-sprayed composite material is polished.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
in the invention, a melt layering step is arranged in the process, the melt is extruded at a specific temperature, particles are completely plasticized during extrusion, the multilayer or single-layer direct-spraying composite material is realized by a splitter under the layered and split flow control, multilayer coextrusion is realized, the traditional process of forming a composite material layer by glue is abandoned, the environmental protection of production can be effectively realized, the quality and the environmental protection of products can be effectively ensured, simultaneously, a material corona treatment and a roller passing process are arranged in the process, the surface tension and the adsorption force of the direct-spraying composite material can be effectively improved by the corona treatment of the composite material, the quality of the direct-spraying composite material is improved, the ductility and the quality of a produced plastic box are improved, the roller passing temperature is strictly controlled in the arranged roller passing treatment process, and the effect of the direct-spraying composite material after corona treatment can be effectively maintained, the surface tension of the composite material is kept, so that the service life of the direct-spraying composite material is prolonged, and the application effect of the process is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The invention provides a technical scheme that: a direct-spraying PP process for reducing a glue layer of a plastic box comprises the following steps:
s1, preparing raw materials, wherein the raw materials comprise PE, PP, soybean oil, an antioxidant, an antibacterial agent and a dispersing agent;
s2, taking out the PE, placing the PE in a vibrating and melting device, raising the temperature to 130 ℃ to melt the PE, simultaneously adding quantitative antioxidant and antibacterial agent into the molten solution, and stirring at the speed of 200 r/min;
s3, after 10min, stopping stirring, standing for 20-30min, and carrying out heat preservation and layering;
s4, placing the PP material in a direct pouring device, raising the temperature to 200 ℃ to melt the PP, adding quantitative antioxidant and antibacterial agent into the molten solution, and stirring at a speed of 200 r/min;
s5, after 20min, stopping stirring, standing for 30min again, and carrying out heat preservation and layering;
s6, placing the melt in the heat-insulating S3 in an extruder, keeping the temperature in the extruder to 100 ℃, conducting layered flow distribution at the speed of 0.5m/min to guide the melt out onto a cast sheet, and forming the cooling liquid;
s7, after cooling and forming, opening a direct pouring device, and enabling the molten PP to be subjected to layered direct pouring through a flow divider, so that the PP solution subjected to direct pouring is uniformly laid on the forming body in the S6;
s8, cooling and forming the PP waiting for direct spraying;
s9, after forming, taking down the direct-spraying composite material, carrying out corona treatment, and after corona, placing the direct-spraying composite material on a roller shaft at 25-35 ℃ for roller treatment;
s10, taking down the corona-treated direct-spraying composite material, and carrying out size scribing and slitting treatment on the direct-spraying composite material according to requirements;
s11, placing the cut direct-spraying composite material on a polishing device, keeping the rotating speed of 1200r/min, and performing surface polishing treatment on the direct-spraying composite material;
and S12, after treatment, rolling and storing the direct-spraying composite material.
In the embodiment, a melt layering step is arranged in the process, the melt is extruded at a specific temperature, particles are completely plasticized during extrusion, the particles are melted and extruded through a plurality of single screws, multilayer coextrusion is controlled through layering and distribution, multilayer or single-layer direct spraying of the composite material is realized through a distributor, the traditional process of forming the composite material layer through a glue layer is abandoned, the production environment-friendly property can be effectively realized, and meanwhile, the quality and the environment-friendly property of the product can be effectively guaranteed.
Example 2
The invention provides a technical scheme that: a direct-spraying PP process for reducing a glue layer of a plastic box comprises the following steps:
s1, preparing raw materials, wherein the raw materials comprise PE, PP, soybean oil, an antioxidant, an antibacterial agent and a dispersing agent;
s2, taking out the PE, placing the PE in a vibrating and melting device, raising the temperature to 140 ℃ to melt the PE, simultaneously adding quantitative antioxidant and antibacterial agent into the molten solution, and stirring at the speed of 250 r/min;
s3, after 12min, stopping stirring, standing for 25min, and carrying out heat preservation and layering;
s4, placing the PP material in a direct pouring device, raising the temperature to 210 ℃ to melt the PP, adding quantitative antioxidant and antibacterial agent into the molten solution, and stirring at the speed of 250 r/min;
s5, after 22min, stopping stirring, standing for 35min again, and carrying out heat preservation and layering;
s6, placing the melt in the heat-insulating S3 into an extruder, keeping the temperature in the extruder to 110 ℃, conducting layered flow distribution at the speed of 0.7m/min to guide the melt out onto a cast sheet, and forming the cooling liquid;
s7, after cooling and forming, opening a direct pouring device, and enabling the molten PP to be subjected to layered direct pouring through a flow divider, so that the PP solution subjected to direct pouring is uniformly laid on the forming body in the S6;
s8, cooling and forming the PP waiting for direct spraying;
s9, after forming, taking down the direct-spraying composite material, carrying out corona treatment, and after corona, placing the direct-spraying composite material on a roller shaft at 30 ℃ for roller treatment;
s10, taking down the corona-treated direct-spraying composite material, and carrying out size scribing and slitting treatment on the direct-spraying composite material according to requirements;
s11, placing the cut direct-spraying composite material on a polishing device, keeping the rotating speed of 1400r/min, and performing surface polishing treatment on the direct-spraying composite material;
and S12, after treatment, rolling and storing the direct-spraying composite material.
In the embodiment, the material corona treatment process is arranged, so that the surface tension and the adsorption force of the direct-spraying composite material can be effectively improved by the corona treatment of the composite material, the quality of the direct-spraying composite material is improved, and the ductility and the quality of the produced plastic box are improved.
Example 3
The invention provides a technical scheme that: a direct-spraying PP process for reducing a glue layer of a plastic box comprises the following steps:
s1, preparing raw materials, wherein the raw materials comprise PE, PP, soybean oil, an antioxidant, an antibacterial agent and a dispersing agent;
s2, taking out the PE, placing the PE in a vibrating and melting device, raising the temperature to 150 ℃ to melt the PE, simultaneously adding quantitative antioxidant and antibacterial agent into the molten solution, and stirring at the speed of 300 r/min;
s3, after 15min, stopping stirring, standing for 30min, and carrying out heat preservation and layering;
s4, placing the PP material in a direct pouring device, raising the temperature to 220 ℃ to melt the PP, adding quantitative antioxidant and antibacterial agent into the molten solution, and stirring at the speed of 300 r/min;
s5, after 25min, stopping stirring, standing for 45min again, and carrying out heat preservation and layering;
s6, placing the melt in the heat-insulating S3 into an extruder, keeping the temperature in the extruder to 120 ℃, conducting layered flow distribution at the speed of 0.8m/min to guide the melt out onto a cast sheet, and forming the cooling liquid;
s7, after cooling and forming, opening a direct pouring device, and enabling the molten PP to be subjected to layered direct pouring through a flow divider, so that the PP solution subjected to direct pouring is uniformly laid on the forming body in the S6;
s8, cooling and forming the PP waiting for direct spraying;
s9, after forming, taking down the direct-spraying composite material, carrying out corona treatment, and after corona, placing the direct-spraying composite material on a roller shaft at 35 ℃ for roller treatment;
s10, taking down the corona-treated direct-spraying composite material, and carrying out size scribing and slitting treatment on the direct-spraying composite material according to requirements;
s11, placing the cut direct-spraying composite material on a polishing device, keeping the rotating speed at 1600r/min, and performing surface polishing treatment on the direct-spraying composite material;
and S12, after treatment, rolling and storing the direct-spraying composite material.
In the embodiment, the roller passing process is arranged, the temperature of the roller passing is strictly controlled in the arranged roller passing treatment process, the effect of the directly-sprayed composite material after corona is effectively kept, and the surface tension of the directly-sprayed composite material is kept, so that the service life of the directly-sprayed composite material is prolonged, and the application effect of the process is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A direct-spraying PP process for reducing a glue layer of a plastic box comprises the following steps:
s1, preparing raw materials;
s2, taking out the PE, placing the PE in a stirring and melting device, increasing the temperature to melt the PE, adding quantitative antioxidant and antibacterial agent into the solution in the molten state, and stirring at a constant speed;
s3, stopping stirring after a period of time, standing for a period of time, and carrying out heat preservation and layering;
s4, placing the PP material in a direct spraying device, increasing the temperature to melt the PP, adding quantitative antioxidant and antibacterial agent into the molten solution, and stirring at a constant speed;
s5, stopping stirring after a period of time, standing for a period of time again, and carrying out heat preservation and layering;
s6, placing the melt in the heat-insulating S3 into an extruder, keeping the temperature in the extruder, guiding the melt out onto a cast sheet through a plurality of extrusion ports in a layered and shunting manner at a certain speed, and forming the cooling liquid;
s7, after cooling and forming, opening a direct pouring device to carry out layered direct pouring on the molten PP, and uniformly paving the PP solution which is directly poured on the forming body in the S6;
s8, cooling and forming the PP waiting for direct spraying;
s9, after forming, taking down the direct-spraying composite material, carrying out corona treatment, and after corona, placing the direct-spraying composite material on a roll shaft at a certain temperature for roll processing;
s10, taking down the corona-treated direct-spraying composite material, and carrying out size scribing and slitting treatment on the direct-spraying composite material according to requirements;
s11, placing the cut direct-spraying composite material on a polishing device, keeping a certain rotating speed, and performing surface polishing treatment on the direct-spraying composite material;
and S12, after treatment, rolling and storing the direct-spraying composite material.
2. The direct pouring PP process for reducing the glue layer of the plastic box as claimed in claim 1, wherein in S1, the raw materials comprise PE, PP, soybean oil, an antioxidant, an antibacterial agent and a dispersant.
3. The PP direct pouring process for reducing the glue layer of the plastic box as claimed in claim 1, wherein in S2, the PE is taken out and placed in a vibrating and melting device, the temperature is raised to 150 ℃ to melt the PE, and meanwhile, a certain amount of antioxidant and antibacterial agent are added into the solution in the molten state, and the stirring is carried out at a speed of 200-.
4. The direct pouring PP process for reducing the glue layer of the plastic box according to claim 1, wherein in the step S3, after 10-15min, stirring is stopped, standing is carried out for 20-30min, and heat preservation and layering are carried out.
5. The PP direct pouring process for reducing the gel water layer of the plastic box as claimed in claim 1, wherein in the step S4, the PP material is placed in a direct pouring device, the temperature is raised to 220 ℃ for melting the PP, and meanwhile, a certain amount of antioxidant and antibacterial agent are added into the molten solution, and the stirring is performed at a speed of 300r/min and 200-.
6. The direct pouring PP process for reducing the glue layer of the plastic box as claimed in claim 1, wherein in the step S5, after 20-25min, stirring is stopped, and standing is carried out for 30-45min again for thermal insulation and layering.
7. The direct pouring PP process for reducing the glue layer of the plastic box as claimed in claim 1, wherein in the step S6, the melt in the heat-preserved step S3 is placed in an extruder, the temperature in the extruder is maintained at 100 ℃ to 120 ℃, the melt is led out onto the cast sheet by layered flow distribution at the speed of 0.5-0.8m/min, and the liquid is cooled for molding.
8. The direct pouring PP process for reducing the plastic box glue layer as claimed in claim 1, wherein in S7, after cooling and forming, the direct pouring device is turned on to allow the molten PP to pass through the splitter for layering and direct pouring, so that the direct poured PP solution is uniformly spread on the formed body in S6.
9. The direct pouring PP process for reducing the glue layer of the plastic box according to claim 1, wherein in the step S9, after the forming, the direct pouring composite material is taken off and subjected to corona treatment, and after the corona treatment, the direct pouring composite material is placed on a roller shaft at 25-35 ℃ to be subjected to roller treatment.
10. The PP process of claim 1, wherein in step S11, the cut directly-sprayed composite material is placed on a polishing device, and the rotation speed is maintained at 1200-1600r/min, so as to polish the surface of the directly-sprayed composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110971418.7A CN113752585A (en) | 2021-08-23 | 2021-08-23 | Direct-spraying PP (propene Polymer) process for reducing glue layer of plastic box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110971418.7A CN113752585A (en) | 2021-08-23 | 2021-08-23 | Direct-spraying PP (propene Polymer) process for reducing glue layer of plastic box |
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| CN113752585A true CN113752585A (en) | 2021-12-07 |
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| CN202110971418.7A Pending CN113752585A (en) | 2021-08-23 | 2021-08-23 | Direct-spraying PP (propene Polymer) process for reducing glue layer of plastic box |
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