Double-thread anti-static polymer replaceable vacuum bottle and preparation method thereof

Abstract

The invention relates to a double-thread anti-static polymer replaceable vacuum bottle and a preparation method thereof, and aims at solving the technical problems that replaceable bottles or inner bottle assemblies of existing similar products are inconvenient to assemble and disassemble, the liquid outlet effect is poor, and the material production process needs to be improved. The replaceable vacuum bottle is characterized in that an annular groove is formed between a first internal thread and a second thread at the bottom of a large ring of the replaceable vacuum bottle, a through hole communicated with a groove in the top of the large ring is formed in one side of the annular groove, and the outer diameter of a cap opening at the bottom of a head cap is sleeved with the inner diameter of a notch of the groove in the top of the large ring; a gap is formed between the inner wall of the inner diameter of the external thread bottle opening of the outer bottle and the outer diameter of the annular groove in the bottom of the large ring, and meanwhile, a bottom groove protruding upwards is formed in the top of the external thread bottle opening of the outer bottle; the outer bottle is a glass bottle or a plastic bottle, convex ribs distributed at equal intervals are arranged on the inner wall of the inner diameter of the external thread bottle opening of the outer bottle or the outer diameter of the annular groove in the bottom of the large ring, and the convex ribs abut against the outer diameter of the annular groove in the bottom of the large ring or the inner wall of the inner diameter of the external thread bottle opening of the outer bottle.

Description

Technical Field

[0001] The invention relates to a vacuum bottle, in particular to a double-thread antistatic polymer replacement vacuum bottle and a preparation method thereof. Background Art

[0002] A vacuum bottle refers to a container that can isolate gas from the outside temperature or isolate external bacteria. The vacuum bottles sold on the market are composed of a cylindrical ellipsoidal container and a piston placed at the bottom. Some vacuum bottles on the market now adopt an inner and outer bottle structure, in which the inner bottle and its replacement assembly have a replacement function, which is convenient for repeated use and for the replacement assembly of different emulsions; such as the application number 202110570378.5 disclosed in the Chinese patent literature, the application publication date 2021.08.31, the invention name "Lightweight anti-static replaceable vacuum bottle and its preparation method"; another example is the application number 202311527255.9 disclosed in the Chinese patent literature, the application publication date 2024.02.26, the invention name "Anti-static polymer vacuum bottle based on elliptical buckle replacement and its preparation method". However, the above-mentioned products and similar products include inner bottles and outer bottles, which mainly realize the replacement of the inner bottle with a pump head by a large ring fixed at the mouth of the inner bottle and the mouth of the outer bottle, or realize the replacement of the inner bottle without a pump head by a large ring and a middle ring fixed at the mouth of the inner bottle and the mouth of the outer bottle and connected as one. Summary of the invention

[0003] In order to overcome the above shortcomings, the purpose of the present invention is to provide a double-threaded anti-static polymer replacement vacuum bottle and its preparation method to the art, so as to solve the technical problems of the existing similar products, such as the inconvenience of replacement or inner bottle assembly and unloading, poor liquid discharge effect, and the need to improve the material production process. The purpose is achieved through the following technical solutions.

[0004] A double-threaded anti-static polymer replacement vacuum bottle, the replacement vacuum bottle comprises an inner bottle assembly, a large piston and a bottom cover, the inner bottle is provided with a large piston, the bottom bottle mouth of the inner bottle is provided with a bottom cover, the inner bottle assembly and the replacement cover form an inner bottle replacement assembly, an outer bottle is provided on the outer side of the inner bottle, the outer bottle is a glass bottle or a plastic bottle, the outer threaded bottle mouth of the outer bottle and the outer threaded bottle mouth of the inner bottle are respectively connected with a first inner thread at the inner wall of the bottom outer side of the large circle and a second inner thread at the inner wall of the bottom inner side, a gasket is provided at the bottle mouth where the inner bottle and the large circle are connected; at the pump core assembly, the valve stem which is buckled and fixed to the top of the center hole in the large circle extends out of the large circle, and at the same time, the valve stem is buckled with the liquid inlet hole of the head cap, the large circle on the outer side of the head cap is provided with a cover mouth which is buckled and fixed to the outer cover of the large circle, the outer cover, the large circle and the outer bottle are connected as a whole and are cylindrical. The key points of its structural design are that an annular groove is provided between the first internal thread and the second thread at the bottom of the large circle, a through hole is provided on one side of the annular groove which communicates with the groove at the top of the large circle, the outer diameter of the cap opening at the bottom of the head cap is inserted into the inner diameter of the groove opening at the top of the large circle; there is a gap between the inner wall of the inner diameter of the external thread bottle opening of the outer bottle and the outer diameter of the annular groove at the bottom of the large circle, and a bottom groove protruding upward is provided at the top of the external thread bottle opening of the outer bottle. In the above structure, the large circle adopts double threads to match the inner and outer bottles, which has stronger fastening and is easy to replace.

[0005] The top of the center hole in the large circle at the buckling point of the pump core assembly protrudes upward to form a stepped boss, and a stepped groove is provided in the bottom cap opening of the head cap corresponding to the stepped boss. A raised positioning rib is provided on one side of the inner wall of the stepped groove of the head cap, and the positioning rib of the head cap is aligned with the positioning groove on one side of the stepped boss of the large circle and pressed to limit the misalignment.

[0006] The bottom of the pump body of the pump core assembly is provided with an elastic sleeve, the outer diameter of one end of the inner plug is buckled and fixed to the inner diameter of the pump port of the pump body, and the outer diameter protrusion of the connection is buckled and fixed to the buckle groove at the top of the center hole in the large circle, the outer diameter of the pump body below the buckle is sealed against the inner wall of the center hole in the large circle, the small piston in the pump body is fixed to the orifice at one end of the valve stem in the pump body through a valve needle, the valve needle is buckled with the buckle rib in the upper part of the orifice of this end of the valve stem and a channel is left, the inner outer opening of the top of the small piston is against the inner diameter of the orifice of this end of the valve stem, the inner sleeve opening of the bottom of the small piston is against the end ring groove of the valve needle, the other end of the valve stem extends out of the pump body and the inner plug and is provided with a spring on the outer diameter, one end of the spring is against the upper spring groove below the outer diameter of the orifice at the other end of the valve stem, the other end of the spring is against the bottom limiting groove in the upper spring cavity on the top of the inner plug, the spring is encapsulated in the lower spring cavity of the inner plug and the upper spring cavity of the valve stem, and the piston leaf of the small piston outer diameter is sealed against the inner wall of the pump body. The above is a specific structural embodiment of a pump core assembly.

[0007] The distance between the valve needle in the pump body of the pump core assembly and the inner wall of the small piston center hole of the small piston is smaller than the channel distance between the valve needle and the fastening ribs of the valve stem, and the channel distance between the valve needle and the fastening ribs of the valve stem is 0.5mm.

[0008] The conical groove on the top of the large piston at the bottom of the pump body of the pump core assembly corresponds to the protrusion at the bottom of the upper pump body that is higher than the top of the inner bottle.

[0009] The inner wall of the inner diameter of the outer threaded bottle mouth of the outer bottle or the outer diameter of the annular groove at the bottom of the large circle is provided with equidistantly distributed convex ribs, and the convex ribs abut against the outer diameter of the annular groove at the bottom of the large circle or the inner wall of the inner diameter of the outer threaded bottle mouth of the outer bottle. Thus, the gap between the inner wall of the inner diameter of the outer threaded bottle mouth of the outer bottle and the outer diameter of the annular groove at the bottom of the large circle is more stable, and the outer bottle is not easy to swing, especially when the outer bottle is a plastic bottle.

[0010] The head cap is an antistatic polymer head cap, and the antistatic polymer material components and weight ratio of the antistatic polymer head cap are: polyethylene, filler, antistatic agent, plasticizer, nucleating agent and coupling agent. The filler is graphene powder, the antistatic agent is fatty alcohol polyoxyethylene ether, the plasticizer is acetyl citrate trioctyl ester, the nucleating agent is ethylene propylene rubber, the coupling agent is titanate coupling agent, the polyethylene accounts for 83-90 parts, the graphene powder accounts for 17-10 parts, and the fatty alcohol polyoxyethylene ether accounts for 2-7 parts. The trioctyl acetyl citrate accounts for 1-6 parts, the EPDM rubber accounts for 4-9 parts, and the titanate coupling agent accounts for 1-2 parts; the above materials are added to a homogenizer at 8000-12000 rpm for homogenization for 3-15 minutes, heated to 40-60°C for reaction for 1-3 hours, and after the reaction is completed, centrifuged and added to a high-speed mixer with a rotation speed of 800-1000 rpm. After mixing evenly, the temperature is controlled to increase to 160-180°C, put into a low-speed mixer for mixing and cooling, and then added to a twin-screw extruder for extrusion and granulation.

[0011] 15-25 parts of degradable calcium carbonate masterbatch, 2-5 parts of polylactic acid, 1-3 parts of lubricant, and an appropriate amount of sulfuric acid solution with a concentration of 8-10% are added into the homogenizer, and the lubricant is one or more of magnesium stearate, zinc stearate, and calcium stearate.

[0012] The invention has reasonable structural design, is easy to use and carry, has good sealing and stability, has good preparation material performance, and has a feasible production method; it is suitable for use as a double-threaded antistatic polymer replacement vacuum bottle, and is a structural improvement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention, in which the dotted line represents the state after the head cap is pressed.

[0014] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of the head cap, pump core assembly, and large circle explosion state.

[0015] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure in the explosion state, in which the outer cover is omitted.

[0016] Figure 4 It is a schematic diagram of the explosion structure of the inner bottle replacement assembly of the present invention.

[0017] Figure 5 yes Figure 1 Schematic diagram of the structure of the inner bottle replacement assembly in use state, in which the original reusable components are cut away.

[0018] Figure 6 yes Figure 5 Schematic diagram of the outer bottle loading state structure.

[0019] Serial numbers and names of the accompanying drawings: 1. Outer cover, 2. Head cap, 201. Positioning ribs, 3. Pump core assembly, 4. Gasket, 5. Large circle, 501. First internal thread, 502. Second internal thread, 503. Through hole, 504. Gap, 505. Bottom groove, 6. Glass bottle, 601. Convex ribs, 7. Inner bottle, 8. Large piston, 9. Bottom cover, 10. Replacement cover. Implementation

[0020] Now, the structure of the present invention is further described in conjunction with the accompanying drawings. Figure 1-Figure 6 As shown, the inner bottle 7, large piston 8 and bottom cover 9 of the replacement vacuum bottle constitute an inner bottle assembly, the inner bottle is provided with a large piston, the bottom bottle mouth of the inner bottle is provided with a bottom cover, the inner bottle assembly and the replacement cover 10 constitute an inner bottle replacement assembly, the outer side of the inner bottle is provided with an outer bottle, the outer bottle is a glass bottle 6 or a plastic bottle, the external threaded bottle mouth of the outer bottle and the external threaded bottle mouth of the inner bottle are respectively connected with the first internal thread 501 at the inner wall of the bottom outer side of the large circle 5 and the second internal thread 502 at the inner wall of the bottom inner side, and a gasket 4 is provided at the bottle mouth where the inner bottle and the large circle are connected; the valve stem of the pump core assembly 3, which is fastened and fixed to the top of the center hole in the large circle, extends out of the large circle, and the valve stem is fastened with the liquid inlet hole of the head cap 2, and the large circle on the outside of the head cap is provided with a cover mouth that is fastened and fixed to the outer cover 1 of the large circle, and the outer cover, the large circle and the outer bottle are connected as a whole and are cylindrical. An annular groove is provided between the first internal thread and the second internal thread at the bottom of the large circle, and a through hole 503 communicating with the groove at the top of the large circle is provided on one side of the annular groove, and the outer diameter of the cap opening at the bottom of the head cap is inserted into the inner diameter of the groove opening at the top of the large circle; a gap 504 is provided between the inner wall of the inner diameter at the external thread opening of the outer bottle and the outer diameter at the annular groove at the bottom of the large circle, and a bottom groove 505 protruding upward is provided at the top of the external thread opening of the outer bottle. At the same time, the inner wall of the inner diameter at the external thread opening of the outer bottle or the outer diameter at the annular groove at the bottom of the large circle 5 is provided with equidistantly distributed convex ribs 601, and the convex ribs are against the outer diameter at the annular groove at the bottom of the large circle, or the inner wall of the inner diameter at the external thread opening of the outer bottle.

[0021] The top of the center hole in the large circle at the buckling point of the above-mentioned pump core assembly protrudes upward to form a stepped boss, and a stepped groove is provided in the bottom cap opening of the head cap corresponding to the stepped boss. A raised positioning rib 201 is provided on one side of the inner wall of the stepped groove of the head cap, and the positioning rib of the head cap is aligned with the positioning groove on one side of the stepped boss of the large circle and pressed to limit the misalignment. The bottom of the pump body of the pump core assembly is provided with an elastic sleeve, the outer diameter of one end of the inner plug is buckled and fixed to the inner diameter of the pump port of the pump body, and the outer diameter protrusion of the connection is buckled and fixed to the buckle groove at the top of the center hole in the large circle, the outer diameter of the pump body below the buckle is sealed against the inner wall of the center hole in the large circle, the small piston in the pump body is fixed to the orifice at one end of the valve stem in the pump body through a valve needle, the valve needle is buckled with the buckle rib in the upper part of the orifice at this end of the valve stem and a channel is left, the inner outer opening on the top of the small piston is against the inner diameter of the orifice at this end of the valve stem, the inner sleeve opening on the bottom of the small piston is against the end ring groove of the valve needle, the other end of the valve stem extends out of the pump body and the inner plug and is provided with a spring on the outer diameter, one end of the spring is against the upper spring groove below the outer diameter of the orifice at the other end of the valve stem, the other end of the spring is against the bottom limiting groove in the upper spring cavity on the top of the inner plug, the spring is encapsulated in the lower spring cavity of the inner plug and the upper spring cavity of the valve stem, and the piston leaf of the small piston outer diameter is sealed against the inner wall of the pump body. The distance between the valve needle and the inner wall of the center hole of the small piston of the small piston in the pump body of the pump core assembly is smaller than the channel distance between the valve needle and the buckling ribs of the valve stem, and the channel distance between the buckling ribs of the valve needle and the valve stem is 0.5mm. The conical groove on the top of the large piston at the bottom of the pump body of the pump core assembly corresponds to the protrusion of the bottom of the upper pump body that is higher than the top of the inner bottle.

[0022] The assembly method of the replacement vacuum bottle is as follows: 1) Formal installation, the nozzle assembly is pressed into place by the pump core assembly from the top of the large circle, the buckle position of the pump core assembly fits in place with the buckle position of the large circle, and the sealing surface of the buckle position of the pump core assembly and the sealing rib of the large circle are in interference sealing fit; the gasket is installed from the bottom of the large circle pump core and pressed into place, the gasket and the outer diameter of the pump body of the pump core assembly are in interference fit, and the gasket is attached to the corresponding bottom of the large circle; the buckle position of the head cap and the buckle position of the valve stem of the pump core assembly are buckled into a sealing fit; the buckle position of the outer cover and the outer diameter of the large circle are in place, and the assembly of the nozzle assembly is completed. The inner bottle assembly is to install the piston from the bottom of the inner bottle, the sealing rib of the piston and the inner wall of the inner bottle are in interference sealing fit, and then the bottom cover is installed from the bottom of the inner bottle, and the buckle position of the bottom cover and the buckle position of the inner bottle are in place, and the assembly of the inner bottle assembly is completed. Finished product assembly: Screw the second internal thread of the large circle of the nozzle assembly into the external thread of the bottle mouth of the inner bottle assembly until it bottoms, and the gasket and the bottle mouth of the inner bottle are in interference fit. After the nozzle assembly and the inner bottle assembly are assembled, screw the first internal thread of the large circle into the external thread of the bottle mouth of the outer bottle until it bottoms, and the genuine assembly is completed. 2) Replacement: Screw the replacement cap into the second internal thread of the large circle of the inner bottle assembly until it bottoms, and the replacement cap and the bottle mouth of the inner bottle are in interference fit, and finally screw it into the original outer bottle until the first internal thread of the large circle, and the assembly of the replacement is completed.

[0023] The above-mentioned head cap is an antistatic polymer head cap. The antistatic polymer material components and weight ratio of the antistatic polymer head cap are: polyethylene, filler, antistatic agent, plasticizer, nucleating agent and coupling agent. The filler is graphene powder, the antistatic agent is fatty alcohol polyoxyethylene ether, the plasticizer is acetyl trioctyl citrate, the nucleating agent is ethylene propylene rubber, and the coupling agent is titanate coupling agent. In Example 1, the polyethylene accounts for 83 parts, the graphene powder accounts for 17 parts, the fatty alcohol polyoxyethylene ether accounts for 2 parts, the acetyl trioctyl citrate accounts for 1 part, the EPDM rubber accounts for 4 parts, and the titanate coupling agent accounts for 1 part; in Example 2, the polyethylene accounts for 87 parts, the graphene powder accounts for 15 parts, the fatty alcohol polyoxyethylene ether accounts for 5 parts, the acetyl trioctyl citrate accounts for 5 parts, the EPDM rubber accounts for 5 parts, and the titanate coupling agent accounts for 1.5 parts; in Example 3, the polyethylene accounts for 90 parts, the graphene powder accounts for 10 parts, the fatty alcohol polyoxyethylene ether accounts for 7 parts, the acetyl trioctyl citrate accounts for 6 parts, the EPDM rubber accounts for 9 parts, and the titanate coupling agent accounts for 2 parts. The above materials are added to a homogenizer and homogenized at 8000-12000 rpm for 3-15 minutes, heated to 40-60°C for reaction for 1-3 hours, and after the reaction is completed, centrifuged and added to a high-speed mixer with a rotation speed of 800-1000 rpm. After mixing evenly, the temperature is increased to 160-180°C, and the mixture is placed in a low-speed mixer for mixing and cooling, and then added to a twin-screw extruder for extrusion and granulation. 15-25 parts of degradable calcium carbonate masterbatch, 2-5 parts of polylactic acid, 1-3 parts of lubricant, and an appropriate amount of sulfuric acid solution with a concentration of 8-10% are added to the above homogenizer, and the lubricant is one or more of magnesium stearate, zinc stearate, and calcium stearate.

[0024] In summary, after the contents in the inner bottle of the replacement vacuum bottle are used up, the large circle is rotated to separate the large circle from the outer bottle, and then a new inner bottle assembly is screwed in to replace it. After the replacement is completed, the outer bottle is installed to complete the replacement of the product. The replacement vacuum bottle and its replacement are used in daily chemical packaging and skin care products. In order to promote global environmental awareness, reduce the output of plastic products and protect the environment, this environmentally friendly replacement cosmetic packaging container is a replacement design, and the inner bottle assembly that loads the contents is a replacement part; when the contents are used up, only the new inner bottle assembly needs to be replaced. After the replacement, the product function can still be realized and can be used normally, which minimizes the overall product discard rate after use, which is in line with today's green environmental awareness.

Claims

1. A double-threaded anti-static polymer replacement vacuum bottle, the replacement vacuum bottle comprises an inner bottle (7), a large piston (8) and a bottom cover (9) forming an inner bottle assembly, the inner bottle is provided with a large piston, the bottom bottle mouth of the inner bottle is provided with a bottom cover, the inner bottle assembly and the replacement cover (10) form an inner bottle replacement assembly, the outer side of the inner bottle is provided with an outer bottle, the outer bottle is a glass bottle (6) or a plastic bottle, the outer threaded bottle mouth of the outer bottle and the outer threaded bottle mouth of the inner bottle are respectively connected with a first inner thread (501) at the inner wall of the bottom outer side of the large circle and a second inner thread (502) at the inner wall of the bottom inner side of the large circle; the valve stem of the pump core assembly (3) which is buckled and fixed to the top of the center hole in the large circle extends out of the large circle, and at the same time, the valve stem is buckled with the liquid inlet hole of the head cap (2), the large circle outside the head cap is provided with a cover mouth which is buckled and fixed to the outer cover (1) of the large circle, the outer cover, the large circle and the outer bottle are connected as a whole and are cylindrical; it is characterized in that An annular groove is provided between the first internal thread (501) and the second thread (502) at the bottom of the large circle (5); a through hole (503) communicating with the groove at the top of the large circle is provided on one side of the annular groove; the outer diameter of the cap opening at the bottom of the head cap (2) is inserted into the inner diameter of the groove at the top of the large circle; a gap (504) is provided between the inner wall of the inner diameter at the external thread opening of the outer bottle and the outer diameter of the annular groove at the bottom of the large circle; at the same time, a bottom groove (505) protruding upward is provided at the top of the external thread opening of the outer bottle.

2. The double-threaded anti-static polymer replacement vacuum bottle according to claim 1, characterized in that The top of the center hole in the large circle (5) at the buckling point of the pump core assembly (3) protrudes upward to form a stepped boss, and a stepped groove is provided in the bottom cap opening of the head cap corresponding to the stepped boss. A raised positioning rib (201) is provided on one side of the inner wall of the stepped groove of the head cap, and the positioning rib of the head cap is aligned with the positioning groove on one side of the stepped boss of the large circle and pressed to limit the misalignment.

3. The double-threaded antistatic polymer replacement vacuum bottle according to claim 1, characterized in that The bottom of the pump body of the pump core assembly (3) is provided with an elastic sleeve, the outer diameter of one end of the inner plug is buckled and fixed to the inner diameter of the pump port of the pump body, and the outer diameter protrusion at the connection is buckled and fixed to the buckle groove at the top of the inner center hole of the large circle (5), the outer diameter of the pump body below the buckle is sealed against the inner wall of the inner center hole of the large circle, the small piston in the pump body is fixed to the orifice of one end of the valve stem in the pump body through the valve needle, the valve needle is buckled with the buckle rib above the orifice of the valve stem and a channel is left, the inner side outward opening of the top of the small piston is against the inner diameter of the orifice of the valve stem, the inner side sleeve opening of the bottom of the small piston is against the end ring groove of the valve needle, the other end of the valve stem extends out of the pump body and the inner plug and is provided with a spring on the outer diameter, one end of the spring is against the upper spring groove below the outer diameter of the orifice of the other end of the valve stem, the other end of the spring is against the bottom limit groove in the upper spring cavity of the top of the inner plug, the spring is encapsulated in the lower spring cavity of the inner plug and the upper spring cavity of the valve stem, and the piston leaf of the small piston outer diameter is sealed against the inner wall of the pump body.

4. The double-threaded antistatic polymer replacement vacuum bottle according to claim 3, characterized in that The distance between the valve needle in the pump body of the pump core assembly (3) and the inner wall of the small piston center hole of the small piston is smaller than the channel distance between the valve needle and the fastening ribs of the valve stem, and the channel distance between the valve needle and the fastening ribs of the valve stem is 0.5 mm.

5. The double-threaded antistatic polymer replacement vacuum bottle according to claim 1, characterized in that The conical groove on the top of the large piston (8) below the pump body of the pump core assembly (3) corresponds to the protrusion at the bottom of the upper pump body that is higher than the top of the inner bottle (7).

6. The double-threaded antistatic polymer replacement vacuum bottle according to claim 1, characterized in that The inner wall of the inner diameter at the external threaded mouth of the outer bottle or the outer diameter of the annular groove at the bottom of the large ring (5) is provided with equidistantly distributed convex ribs (601), and the convex ribs abut against the outer diameter of the annular groove at the bottom of the large ring or the inner wall of the inner diameter at the external threaded mouth of the outer bottle.

7. The method for preparing the double-threaded antistatic polymer replacement vacuum bottle according to claim 1, characterized in that The head cap (2) is an antistatic polymer head cap, and the antistatic polymer material components and weight ratio of the antistatic polymer head cap are: polyethylene, filler, antistatic agent, plasticizer, nucleating agent and coupling agent, the filler is graphene powder, the antistatic agent is fatty alcohol polyoxyethylene ether, the plasticizer is acetyl citrate trioctyl ester, the nucleating agent is ethylene propylene rubber, the coupling agent is titanate coupling agent, the polyethylene accounts for 83-90 parts, the graphene powder accounts for 17-10 parts, the fatty alcohol polyoxyethylene ether accounts for 2-7 The above materials are added to a homogenizer and homogenized at 8000-12000 rpm for 3-15 minutes, heated to 40-60°C for reaction for 1-3 hours, and after the reaction is completed, centrifuged and added to a high-speed mixer at a speed of 800-1000 rpm. After mixing evenly, the temperature is controlled to increase to 160-180°C, the mixture is put into a low-speed mixer for mixing and cooling, and then added to a twin-screw extruder for extrusion and granulation.

8. The method for preparing the double-threaded antistatic polymer replacement vacuum bottle according to claim 7, characterized in that 15-25 parts of degradable calcium carbonate masterbatch, 2-5 parts of polylactic acid, 1-3 parts of lubricant, and an appropriate amount of sulfuric acid solution with a concentration of 8-10% are added into the homogenizer, and the lubricant is one or more of magnesium stearate, zinc stearate, and calcium stearate.

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