CN115304753B - Copolyester cosmetic packaging material, preparation method and extruder - Google Patents
Copolyester cosmetic packaging material, preparation method and extruder Download PDFInfo
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- CN115304753B CN115304753B CN202211233148.0A CN202211233148A CN115304753B CN 115304753 B CN115304753 B CN 115304753B CN 202211233148 A CN202211233148 A CN 202211233148A CN 115304753 B CN115304753 B CN 115304753B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
- C08G63/181—Acids containing aromatic rings
- C08G63/183—Terephthalic acids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/252—Drive or actuation means; Transmission means; Screw supporting means
- B29C48/2526—Direct drives or gear boxes
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/285—Feeding the extrusion material to the extruder
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
- B29C48/405—Intermeshing co-rotating screws
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
- C08G63/82—Preparation processes characterised by the catalyst used
- C08G63/85—Germanium, tin, lead, arsenic, antimony, bismuth, titanium, zirconium, hafnium, vanadium, niobium, tantalum, or compounds thereof
- C08G63/86—Germanium, antimony, or compounds thereof
- C08G63/866—Antimony or compounds thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention relates to the technical field of cosmetic packaging materials, and discloses a preparation method of a high-transparency chemical-corrosion-resistant copolyester cosmetic packaging material. The invention uses terephthalic acid, neopentyl glycol, ethylene glycol and nano SiO 2 Ethylene glycol antimony and triphenyl phosphate are taken as raw materials to obtain the nano SiO 2 Modified PETG polyester. Then the nano SiO is put into 2 Mixing and stirring modified PETG polyester, nano ZnO, PET resin, ABS resin, sorbitan stearate and the like; and melting, blending and extruding the mixed materials, and granulating to obtain the high-transparency chemical corrosion-resistant copolyester cosmetic packaging material. Nano SiO2 2 The addition of the modified PETG polyester can enhance the compatibility of ABS and PET, and can improve the transparency and performance of the composite material. Thereby obtaining the copolyester-based high-transparency chemical-corrosion-resistant cosmeticAnd (7) packaging the materials.
Description
Technical Field
The invention relates to the field of cosmetic packaging materials, in particular to a copolyester cosmetic packaging material, a preparation method and an extruder for preparing the copolyester cosmetic packaging material.
Background
Cosmetics have various varieties and different functions, but the cosmetic packaging materials suitable for the cosmetics have various disadvantages. For example, cosmetic packaging materials such as glass and plastic have problems such as environmental unfriendliness of plastic and poor impact resistance of glass bottles. And the resin materials represented by ABS and PETG have the advantages of high transparency, flexibility, corrosion resistance, processability and low cost, so that various cosmetic packaging materials prepared from the resin are popularized.
The prior art studies on the preparation of cosmetic packaging materials using resins are as follows:
chinese patent No. 103481437B discloses a method for forming a copolyester container. Adding a PCTG copolyester raw material into an injection molding machine for melting, then injecting the melted PCTG copolyester into a die cavity of a die, cooling and molding to obtain the copolyester container. However, the molded container prepared from pure copolyester is suitable for cosmetic packaging materials, and has poorer corrosion resistance, appearance transparency and the like compared with composite resin materials.
For another example, chinese application CN112694658A discloses a method for preparing polyethylene film. The linear low-density polyethylene and the long-chain polyethylene are mixed, melted, extruded and granulated to obtain the film material with high transparency and high mechanical property, and the film material is suitable for cosmetic packaging materials. However, the polyethylene film has poor corrosion resistance, is easy to yellow and has short service life.
Disclosure of Invention
In order to solve the above problems, the present invention provides a method for preparing a cosmetic packaging material having high transparency and chemical resistance using a copolyester resin, comprising the steps of:
step (1), preparing nano SiO2 modified PETG polyester: mixing and pulping terephthalic acid, neopentyl glycol, ethylene glycol, nano SiO2, ethylene glycol antimony and triphenyl phosphate to obtain slurry; heating the slurry to perform chemical combination chain link reaction to obtain a mixed liquid material; carrying out vacuum polymerization reaction on the mixed liquid material under reduced pressure to obtain a melt; discharging the melt, cooling under water, and granulating to obtain nano SiO2 modified PETG polyester;
step (2), mixing and stirring the nano SiO2 modified PETG polyester, nano ZnO, PET resin, ABS resin, sorbitan stearate, pentaerythritol tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], phenyl tri (2, 4-di-tert-butyl) phosphite and OP wax in a stirrer to obtain a mixed material;
wherein, the sorbitan stearate is also called as sorbitan monostearate, and the molecular formula is C24H46O6;
and (3) melting and blending the mixed materials through an extruder, and extruding and granulating to obtain the high-transparency chemical-corrosion-resistant copolyester cosmetic packaging material.
Preferably, in the step (1), the mixing mass ratio of terephthalic acid, neopentyl glycol, ethylene glycol, nano SiO2, ethylene glycol antimony and triphenyl phosphate is (10000-12000): (2500-3000): (3000-4000): (20-40): (10-20): (5-15).
Preferably, in the step (1), the mixing and beating time of the terephthalic acid, the neopentyl glycol, the ethylene glycol, the nano SiO2, the ethylene glycol antimony and the triphenyl phosphate is 30-60min.
Preferably, in the step (1), the temperature of the combination chain reaction is 200-255 ℃, and the reaction time is 3-4h.
Preferably, in the step (1), the temperature of the vacuum polymerization reaction is 280-300 ℃, the vacuum degree is 0.09-0.1MPa, and the reaction time is 200-230min.
Preferably, in the step (2), the nano-SiO 2 modified PETG polyester, the nano-ZnO, the PET resin, the ABS resin, the sorbitan stearate, the pentaerythritol tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], the phenyl tris (2, 4-di-tert-butyl) phosphite and the OP wax are mixed according to a mass ratio of (20-35): (5-10): (90-91): 12:2:2:2:1, mixing and stirring.
Preferably, in the step (2), the mixing and stirring conditions are as follows: the stirring speed is 400-500rpm, and the stirring time is 10-15min.
Preferably, in the step (3), the temperature of the melt blending is 230 to 250 ℃.
Preferably, the high-transparency chemical-corrosion-resistant copolyester cosmetic packaging material prepared by the method is used.
The invention also provides an extruder which can be used for carrying out melt blending, extrusion and granulation on the mixed materials in the method.
The extruder comprises an extruding mechanism, a working bin is arranged in the extruding mechanism, a feeding bin is fixedly mounted at one end of the top surface of the working bin, a double-screw extruding and feeding unit is mounted in the working bin, a motor in transmission connection with the double-screw extruding and feeding unit is mounted at one end of the working bin, a discharging template is fixedly mounted at the other end of the working bin, and an electric heating ring is mounted on the inner wall of the working bin; the feeding bin is provided with a feeding adjusting mechanism for adjusting feeding amount, and a feeding mechanism for assisting feeding to the working bin is arranged in the feeding bin; the feeding adjusting mechanism comprises a feeding pipe arranged above the feeding bin, a discharging port is formed in the bottom end of the feeding pipe, a lifting driving unit and an adjusting plug are arranged below the discharging port, and the adjusting plug is arranged at the lower end of the inside of the discharging port in a lifting mode through the lifting driving unit; the feeding mechanism comprises a rotating shaft, the rotating shaft is vertically arranged in the feeding bin, the bottom end of the rotating shaft is rotatably arranged on a bottom plate of the working bin, the bottom end of the rotating shaft is in transmission connection with the double-screw extrusion feeding unit through a transmission unit, and a spiral feeding blade is fixedly arranged on the rotating shaft; in the process that the motor drives the double-screw extrusion feeding unit to rotate, the double-screw extrusion feeding unit drives the rotating shaft and the spiral feeding blade to rotate through the transmission unit, and auxiliary feeding is performed through the rotary extrusion of the spiral feeding blade.
Preferably, the twin-screw extrusion feeding unit comprises a main rod and a driven rod, the main rod and the driven rod are both rotatably installed inside the working bin, and spiral feeding blades are both fixedly installed on the main rod and the driven rod; the one end of mobile jib with motor drive is connected, just fixed mounting has the driving gear on the mobile jib, fixed mounting have on the driven lever with driven gear that driving gear meshing transmission is connected.
Preferably, a connecting sleeve is fixedly mounted at the lower end part of the feeding pipe, a plurality of brackets which are distributed at equal angles are fixedly mounted on the outer ring of the connecting sleeve, and the bottom ends of the brackets are all connected and mounted on the feeding bin.
Preferably, the lifting drive unit comprises a rotating sleeve, the rotating sleeve is movably sleeved at the upper end of the rotating shaft, a plurality of sliding blocks are fixedly connected to the inner ring of the rotating sleeve, a plurality of sliding chutes which are in one-to-one corresponding sliding connection with the sliding blocks are arranged on the rotating shaft, a plurality of propeller blades are fixedly mounted on the outer ring of the rotating sleeve, a plurality of connecting rods are fixedly mounted on the top surface of the rotating sleeve, and the top ends of the connecting rods are connected to the bottom surface of the adjusting plug.
Preferably, the top end of the rotating shaft is fixedly provided with a top plate through a bolt, and the outer ring of the top plate is in sealing abutting joint with the opening of the sliding groove.
Preferably, the transmission unit comprises a transmission shaft, a driving bevel gear and a driven bevel gear, the transmission shaft is rotatably mounted on a bottom plate of the working bin, the driving bevel gear is fixedly mounted on the main rod, the driven bevel gear is fixedly mounted on the transmission shaft, and the driving bevel gear is in meshing transmission connection with the driven bevel gear; the transmission shaft is fixedly provided with a driving wheel, the rotating shaft is fixedly provided with a driven wheel, and the driving wheel is in transmission connection with the driven wheel through a transmission belt.
Preferably, a material guide plate obliquely arranged below the feeding bin is fixedly installed inside the working bin, the lower end of the rotating shaft penetrates and extends to the position below the material guide plate, and the transmission unit is installed below the material guide plate.
Preferably, the discharge hole and the adjusting plug are both in a circular truncated cone-shaped structure.
Compared with the prior art, the high-transparency chemical corrosion resistant copolyester cosmetic packaging material prepared by the invention has the beneficial effects that:
1. the cosmetic packaging material is prepared by compounding three types of resins, wherein the three types of resins are ABS resin, PET resin and PETG polyester respectively. The ABS resin has better mechanical property, strong dimensional stability and high surface glossiness; the PET resin has excellent physical and chemical properties and has mechanical properties of toughness, hardness and rigidity balance; PETG polyester is used as a non-crystalline high polymer, and has the characteristics of high transparency, environmental protection and chemical corrosion resistance; these three types of resins are commonly used as cosmetic packaging materials; wherein, the PETG polyester is modified to optimize the performance;
2. terephthalic acid monomer, ethylene glycol monomer and nano-silica are taken as raw materials, ethylene glycol antimony is taken as a catalyst, triphenyl phosphate is taken as a stabilizer, and the monomer polycondensation is carried out to obtain the nano-SiO 2 modified PETG polyester. As a high molecular material, the material integrates the characteristics of organic and inorganic materials, and can improve the hardness, heat resistance and corrosion resistance of PETG polyester;
3. the addition of the nano SiO2 modified PETG polyester can enhance the compatibility of ABS and PET, and improve the transparency and flexibility of the composite material;
4. when preparing the mixed material of nano SiO2 modified PETG polyester, ABS resin and PET resin, related auxiliary agents are added. The nano ZnO particles have stable wide bandgap performance, so that the light aging resistance of the composite resin can be improved; the permeability-increasing agent sorbitan stearate and the OP wax have synergistic effect to enhance the transparency of the resin composite material. The sorbitan stearate can thin the crystal size of the composite resin, so that most of the wavelength of visible light passes through a resin composite material system; the OP wax can reduce friction in the processing process of the material, thereby taking away gas generated in the processing process and removing impurities; the two auxiliary agents act synergistically, so that the transparency of the composite material is improved. The pentaerythrityl tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and the tris (2, 4-di-tert-butyl) phenyl phosphite are compounded to be used as an antioxidant, so that the antioxidant performance of the material in the processing process can be effectively inhibited, the yellowing speed of the material is reduced, and the service life of the cosmetic packaging material is further prolonged; so that the prepared cosmetic packaging material has the characteristics of chemical corrosion resistance and high transparency;
5. according to the extruder, the feeding bin of the extruder is connected with the stirrer through the feeding pipe for feeding, the discharging adjusting plug and the lifting driving unit which are positioned at the outlet end of the feeding pipe are arranged in the feeding bin, the lifting driving unit can correspondingly lift and adjust the opening and closing degree of the adjusting plug and the orifice of the feeding pipe according to the amount of residual materials in the feeding bin, so that the discharging speed of the feeding pipe is adjusted, the situation that the feeding pipe is too fast to discharge, the blockage in the feeding bin due to too much accumulated materials is avoided, and the normal feeding work of the feeding bin is guaranteed;
6. according to the invention, the extruder is provided with the vertically arranged spiral feeding mechanism in the feeding bin, the spiral feeding mechanism can extrude and convey the mixture conveyed into the feeding bin by the stirrer into the working bin, the efficiency and the strength of feeding the mixture into the working bin by the feeding bin can be improved by forcibly extruding and feeding the mixture by the spiral feeding mechanism, and the mixture is prevented from being gradually condensed and blocking the feeding bin in the conveying process;
7. according to the invention, the spiral feeding mechanism of the extruder is in transmission connection with the spiral conveying rod in the extruder through the transmission unit, when the motor drives the inner spiral conveying rod to rotate to extrude and granulate, the spiral conveying rod synchronously drives the spiral feeding mechanism to rotate through the transmission unit, so that the spiral feeding mechanism is more convenient to open and close, meanwhile, the feeding efficiency of the spiral feeding mechanism is correlated with the feeding efficiency of the spiral conveying rod through the transmission unit, the consistency of the feeding efficiency and the feeding efficiency is convenient to keep, and the machine is prevented from being blocked by excessive feeding.
Drawings
FIG. 1 is a flow chart of a process for preparing a high transparent chemical corrosion resistant copolyester cosmetic packaging material according to the present invention;
FIG. 2 is a bar graph of mechanical property test data of a high transparent chemical corrosion resistant copolyester cosmetic packaging material prepared in an example of the present invention and a comparative example;
FIG. 3 is a schematic perspective view of an extruder according to the present invention;
FIG. 4 is a schematic perspective sectional view of an extruder according to the present invention;
FIG. 5 is an enlarged view of a portion of the extruder shown in FIG. 4A according to the present invention;
FIG. 6 is a second schematic view of the cross-sectional structure of the extruder of the present invention;
FIG. 7 is an enlarged view of a portion of the extruder shown in FIG. 6B;
FIG. 8 is a third schematic view of a three-dimensional cutting structure of the extruder of the present invention;
FIG. 9 is an enlarged view of a portion of the extruder at C in FIG. 8 according to the present invention;
FIG. 10 is a fourth schematic view of the three-dimensional cutting structure of the extruder of the present invention;
FIG. 11 is a schematic perspective view of a double screw extrusion feeding unit and a feeding mechanism of the extruder of the present invention.
In the figure:
1. an extrusion mechanism; 11. a working bin; 12. a feeding bin; 13. a motor; 14. discharging the template; 15. a twin-screw extrusion feeding unit; 151. a main rod; 152. a helical feeding blade; 153. a driven lever; 154. a driving gear; 155. a driven gear; 16. an electric heating coil;
2. a feed adjustment mechanism; 21. a support; 22. connecting sleeves; 23. a feed pipe; 24. a discharge port; 25. a lifting drive unit; 26. an adjusting plug; 251. a rotating sleeve; 252. a slider; 253. a chute; 254. a propeller blade; 255. a connecting rod; 256. a top plate;
3. a feeding mechanism; 31. a rotating shaft; 32. a screw feeding blade; 33. a material guide plate; 34. a transmission unit; 341. a drive shaft; 342. a transmission belt; 343. a drive bevel gear; 344. a driven bevel gear; 345. a driving wheel; 346. a driven wheel.
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. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention. Example 1
A preparation method of a high-transparency chemical corrosion-resistant copolyester cosmetic packaging material comprises the following steps:
1. preparation of nano SiO2 modified PETG polyester
(1) Terephthalic acid, neopentyl glycol, ethylene glycol, nano SiO2, ethylene glycol antimony and triphenyl phosphate according to the mass ratio of 10000:2500:4000:20:20:15 mixing and pulping to obtain pulp; heating the slurry to perform chemical combination chain link reaction to obtain a mixed liquid material; wherein the mixing and pulping time is 30min, the temperature of the combination chain link reaction is 200 ℃, and the combination chain link reaction time is 3h;
(2) Carrying out vacuum polymerization reaction on the mixed liquid material under reduced pressure to obtain a melt; wherein the temperature of the reduced pressure vacuum polymerization reaction is 280 ℃, the vacuum degree is 0.09MPa, and the reaction time is 200min;
(3) Discharging the melt, cooling under water, and granulating to obtain nano SiO2 modified PETG polyester;
2. nano SiO2 modified PETG polyester, nano ZnO, PET resin, ABS resin, sorbitan stearate, tetra [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, tri (2, 4-di-tert-butyl) phenyl phosphite and OP wax are mixed according to the mass ratio of 20:5:90.1:12:2:2:2:1, mixing and stirring in a stirrer for 10min to obtain a mixed material; wherein the rotating speed of the stirrer is 400rpm;
3. and (3) carrying out melt blending and extrusion granulation on the mixed materials at 230 ℃ through an extruder to obtain the high-transparency chemical-corrosion-resistant copolyester cosmetic packaging material. Example 2
A preparation method of a high-transparency chemical-corrosion-resistant copolyester cosmetic packaging material comprises the following steps:
1. preparation of nano SiO2 modified PETG polyester
(1) Terephthalic acid, neopentyl glycol, ethylene glycol, nano SiO2, ethylene glycol antimony and triphenyl phosphate according to a mass ratio of 10500:2600:3800:25:18:12 mixing and pulping to obtain pulp; heating the slurry to perform a chemical combination chain link reaction; wherein the mixing and pulping time is 33min, the temperature of the combination chain reaction is 210 ℃, and the reaction time is 3.2h;
(2) Carrying out reduced pressure vacuum polymerization reaction on the mixed material to obtain a melt; wherein the temperature of the polymerization reaction is 285 ℃, the vacuum degree is 0.09MPa, and the reaction time is 210min;
(3) Discharging the melt, cooling under water, and granulating to obtain nano SiO2 modified PETG polyester;
2. nano SiO2 modified PETG polyester, nano ZnO, PET resin, ABS resin, sorbitan stearate, tetra [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, tri (2, 4-di-tert-butyl) phenyl phosphite and OP wax are mixed according to the mass ratio of 25:6:90.2:12:2:2:2:1, mixing and stirring in a stirrer for 14min to obtain a mixed material; wherein the rotating speed of the stirrer is 480rpm;
3. and (3) carrying out melt blending and extrusion granulation on the mixed material at 245 ℃ through an extruder to obtain the high-transparency chemical-corrosion-resistant copolyester cosmetic packaging material. Example 3
A preparation method of a high-transparency chemical-corrosion-resistant copolyester cosmetic packaging material comprises the following steps:
1. preparation of nano SiO2 modified PETG polyester
(1) Terephthalic acid, neopentyl glycol, ethylene glycol, nano SiO2, ethylene glycol antimony and triphenyl phosphate according to the mass ratio of 10800:2700:3600:30:16:10 mixing and pulping to obtain slurry; heating the slurry to perform a chemical combination chain link reaction; wherein the mixing and pulping time is 40min, the temperature of the combination chain reaction is 220 ℃, and the reaction time is 3.4h;
(2) Carrying out reduced pressure vacuum polymerization reaction on the mixed material to obtain a melt; wherein the temperature of the polymerization reaction is 290 ℃, the vacuum degree is 0.09MPa, and the reaction time is 215min;
(3) Discharging the melt, cooling under water, and granulating to obtain nano SiO2 modified PETG polyester;
2. nano SiO2 modified PETG polyester, nano ZnO, PET resin, ABS resin, sorbitan stearate, tetra [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, tri (2, 4-di-tert-butyl) phenyl phosphite and OP wax are mixed according to the mass ratio of 28:7:90.3:12:2:2:2:1, mixing and stirring in a stirrer for 13min to obtain a mixed material; wherein the rotating speed of the stirrer is 470rpm;
3. and (3) carrying out melt blending and extrusion granulation on the mixed materials at 240 ℃ through an extruder to obtain the high-transparency chemical-corrosion-resistant copolyester cosmetic packaging material. Example 4
A preparation method of a high-transparency chemical-corrosion-resistant copolyester cosmetic packaging material comprises the following steps:
1. preparation of nano SiO2 modified PETG polyester
(1) Terephthalic acid, neopentyl glycol, ethylene glycol, nano SiO2, ethylene glycol antimony and triphenyl phosphate according to a mass ratio of 11000:2600:3400:35:14:8, mixing and pulping to obtain pulp; heating the slurry to perform a chemical combination chain link reaction; wherein the mixing and pulping time is 50min, the temperature of the combination chain reaction is 250 ℃, and the reaction time is 3.8h;
(2) Carrying out reduced pressure vacuum polymerization reaction on the mixed material to obtain a melt; wherein the temperature of the polymerization reaction is 295 ℃, the vacuum degree is 0.1MPa, and the reaction time is 220min;
(3) Discharging the melt, cooling under water, and granulating to obtain nano SiO2 modified PETG polyester;
2. nano SiO2 modified PETG polyester, nano ZnO, PET resin, ABS resin, sorbitan stearate, tetra [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, tri (2, 4-di-tert-butyl) phenyl phosphite and OP wax are mixed according to the mass ratio of 32:8:90.4:12:2:2:2:1, mixing and stirring in a stirrer for 14min to obtain a mixed material; wherein the rotating speed of the stirrer is 490rpm;
3. and (3) carrying out melt blending and extrusion granulation on the mixed material at 245 ℃ through an extruder to obtain the high-transparency chemical corrosion-resistant copolyester cosmetic packaging material. Example 5
A preparation method of a high-transparency chemical corrosion-resistant copolyester cosmetic packaging material comprises the following steps:
1. preparation of nano SiO2 modified PETG polyester
(1) Terephthalic acid, neopentyl glycol, ethylene glycol, nano SiO2, ethylene glycol antimony and triphenyl phosphate according to the mass ratio of 10000:2500:3000:40:10:5, mixing and pulping to obtain pulp; heating the slurry to perform a chemical combination chain link reaction; wherein the mixing and pulping time is 60min, the temperature of the chemical combination chain reaction is 255 ℃, and the reaction time is 4h;
(2) Carrying out reduced pressure vacuum polymerization reaction on the mixed material to obtain a melt; wherein the temperature of the polymerization reaction is 295 ℃, the vacuum degree is 0.1MPa, and the reaction time is 230min;
(3) Discharging the melt, cooling under water, and granulating to obtain nano SiO2 modified PETG polyester;
2. nano SiO2 modified PETG polyester, nano ZnO, PET resin, ABS resin, sorbitan stearate, tetra [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, tri (2, 4-di-tert-butyl) phenyl phosphite and OP wax are mixed according to the mass ratio of 35:10:91:12:2:2:2:1, mixing and stirring in a stirrer for 15min to obtain a mixed material; wherein the rotating speed of the stirrer is 500rpm;
3. and (3) carrying out melt blending and extrusion granulation on the mixed materials at 250 ℃ through an extruder to obtain the high-transparency chemical-corrosion-resistant copolyester cosmetic packaging material.
Comparative example 1
A preparation method of a high-transparency chemical-corrosion-resistant copolyester cosmetic packaging material comprises the following steps:
1. PETG polyester, nano ZnO, PET resin, ABS resin, sorbitan stearate, pentaerythritol tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], tris (2, 4-di-tert-butyl) phenyl phosphite and OP wax are mixed according to the mass ratio of 20:5:90.1:12:2:2:2:1, mixing and stirring in a stirrer for 10min to obtain a mixed material; wherein the rotating speed of the stirrer is 400rpm;
2. and (3) carrying out melt blending and extrusion granulation on the mixed materials at 230 ℃ through an extruder to obtain the high-transparency chemical-corrosion-resistant copolyester cosmetic packaging material.
Comparative example 2
A preparation method of a high-transparency chemical-corrosion-resistant copolyester cosmetic packaging material comprises the following steps:
1. nano ZnO, PET resin, ABS resin, sorbitan stearate, pentaerythritol tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], tris (2, 4-di-tert-butyl) phenyl phosphite and OP wax are mixed according to the mass ratio of 20:5:90.1:12:2:2:2:1, mixing and stirring in a stirrer for 10min to obtain a mixed material; wherein the rotating speed of the stirrer is 400rpm;
2. and (3) carrying out melt blending and extrusion granulation on the mixed materials at 230 ℃ through an extruder to obtain the high-transparency chemical-corrosion-resistant copolyester cosmetic packaging material.
The particle size of the nano SiO2 in all the examples and the comparative examples is 100-200nm and is from Jiangsu Tianxing new materials Co., ltd; the ABS resin is from Shanghai Germany positive plastic technology, inc., the characteristic grade is high impact transparent grade, and the mark is TR-557; neopentyl glycol is from Shandong Youso chemical science and technology Limited, CAS No. 126-30-7, cat No. I94135115; the terephthalic acid is from Jiangsu Chuangteng New Material science and technology Limited, the brand is CTKJCHEM, and the product number is 100-21-0; the ethylene glycol is from Jinan Zhonghui chemical industry Co., ltd, and has a product number of 2021-04; the CAS number of triphenyl phosphate is 115-86-6, and the commodity number is TPP; the ethylene glycol antimony is from Jiangsu neomycin New materials Co., ltd, and has a product number of 29736-75-2; the PET resin is from Shanghai derived plasticizing company Limited, with a product number of 573453543453 and a brand number of FR945; the nano ZnO is from Nanjing Baoke new material Co., ltd, the model is 30nm, and the brand is Baoke new material; the sorbitan stearate is from Henan Zhengxing food additive company Limited, with a product number of 1 and a model number of 60; OP waxes are available as WARADUR-OP from Gnyujin New materials, inc., guangzhou.
After the extrusion of the above examples and comparative examples is completed, the pelletized high-transparency chemical corrosion resistant copolyester cosmetic packaging material is respectively dried in a forced air oven at 100 ℃ for 5 hours to obtain dry particles; and then, carrying out injection molding on the dried particles on an injection molding machine to prepare a sample, and keeping the mold temperature at 100 ℃ in the sample preparation process. And (4) carrying out related performance tests on the prepared samples.
1. Mechanical Property test
1. Tensile strength: the test is carried out according to ISO527 test Standard for tensile Properties of plastics;
specimen type is type I, specimen size (mm): 150 (Length) × (20. + -. 0.2) (end width) × (4. + -. 0.2) (thickness), and a drawing speed of 50mm/min;
2. flexural strength and flexural modulus: the test is carried out according to ISO178 measurement of the bending property of the plastic;
specimen type is specimen size (mm): (80. + -.2) (length) × (10. + -. 0.2) (end width) × (4. + -. 0.2) (thickness), bending speed 20mm/min;
3. melt index: according to ISO1133, the measurement of the melt volume flow rate of thermoplastic plastic after the mass flow is carried out, the high-transparency chemical corrosion resistant copolyester cosmetic packaging material is granular, and is dried for 3 hours at 110 ℃ for testing;
4. light transmittance and haze: the test is carried out according to GB2410-80 transparent plastic light transmittance and haze test method.
The test results are shown in table 1:
TABLE 1
As can be seen from the test results of Table 1, the copolyester cosmetic packaging materials prepared in examples 4 to 5 all had better properties in a series of tests including tensile strength, flexural strength, melt index and light transmittance than those of examples 1 to 2 and comparative example 2. Wherein the light transmittance of example 5 was 99% and the haze was 3.0, and the prepared cosmetic packaging material had high transparency. In contrast, in comparative example 2, because PETG polyester is not added, the blending system of ABS and PET can generate larger diffuse reflection, the haze value is higher, and the light transmittance is reduced.
2. Chemical resistance test
The detection is carried out according to GB/T3857-2017 'test method for chemical medium resistance of glass fiber reinforced thermosetting plastics'. The test results are shown in table 2:
TABLE 2
As can be seen from the test results of Table 2, the copolyester cosmetic packaging materials prepared in examples 4 to 5 have better chemical resistance than the copolyester cosmetic packaging materials prepared in comparative examples 1 to 2. After the prepared cosmetic packaging material is chemically corroded, a series of mechanical properties such as bending strength, bending elastic modulus, barkel hardness and the like are not obviously reduced. However, since the PETG polyester in comparative example 1 is not modified with nano-SiO 2, the chemical resistance is lowered. Example 6
This example provides an extruder which can satisfy the melt blending, extrusion granulation of the mixed materials when preparing the high transparent chemical corrosion resistant copolyester cosmetic packaging material in examples 1-5 and comparative examples 1-2.
Referring to fig. 3 and 4, an extruder comprises an extruding mechanism 1, wherein a working bin 11 is arranged in the extruding mechanism 1, a feeding bin 12 is fixedly installed at one end of the top surface of the working bin 11, a twin-screw extruding and feeding unit 15 is installed in the working bin 11, a motor 13 in transmission connection with the twin-screw extruding and feeding unit 15 is installed at one end of the working bin 11, a discharging template 14 is fixedly installed at the other end of the working bin 11, and an electric heating ring 16 is installed on the inner wall of the working bin 11; the feeding bin 12 is provided with a feeding adjusting mechanism 2 for adjusting feeding amount, and the feeding bin 12 is internally provided with a feeding mechanism 3 for assisting feeding to the working bin 11; the feeding adjusting mechanism 2 comprises a feeding pipe 23 arranged above the feeding bin 12, a discharging port 24 is arranged at the bottom end of the feeding pipe 23, a lifting driving unit 25 and an adjusting plug 26 are arranged below the discharging port 24, and the adjusting plug 26 is arranged at the lower end inside the discharging port 24 in a lifting manner through the lifting driving unit 25; the feeding mechanism 3 comprises a rotating shaft 31, the rotating shaft 31 is vertically arranged in the feeding bin 12, the bottom end of the rotating shaft 31 is rotatably arranged on the bottom plate of the working bin 11, the bottom end of the rotating shaft 31 is in transmission connection with the double-screw extrusion feeding unit 15 through a transmission unit 34, and a spiral feeding blade 32 is fixedly arranged on the rotating shaft 31;
the inlet end of the feeding pipe 23 is connected with the discharge end of the stirrer, the feeding pipe 23 is a heat insulation pipeline, heat dissipation and condensation of mixed materials during conveying in the feeding pipe 23 can be prevented, the discharge port 24 and the adjusting plug 26 are of a circular truncated cone structure, the height of the adjusting plug 26 can be adjusted through the lifting driving unit 25, the discharge amount of the discharge port 24 can be adjusted, uniformly distributed discharge holes are formed in the discharge template 14, when the stirrer finishes the stirring reaction of the mixed materials and starts to discharge, the mixed materials are conveyed into the feeding bin 12 through the feeding pipe 23 and fall into the working bin 11 through the feeding bin 12, at the moment, the motor 13 and the electric heating ring 16 are started, the motor 13 drives the extrusion feeding unit 15 to rotate in the working bin 11 to extrude and convey the mixed materials, the electric heating ring 16 heats and insulates the mixed materials in the working bin 11, so that the mixed materials are continuously melted and blended until the mixed materials are shaped through the discharge holes in the discharge template 14 and then are extruded and discharged; the double-screw extrusion feeding unit 15 drives the rotating shaft 31 to rotate through the transmission unit 34 in the rotating feeding process, so as to drive the spiral feeding blade 32 on the rotating shaft 31 to rotate, the mixture in the feeding bin 12 is extruded and conveyed into the working bin 11 below in the rotating process of the spiral feeding blade 32 to feed, the efficiency and the strength of feeding the mixture in the feeding bin 12 into the working bin 11 can be improved, the mixture can be prevented from being condensed and attached to the inner wall of the feeding bin 12 in the conveying process, so that the feeding bin 12 is blocked, the feeding efficiency of the double-screw extrusion feeding unit 15 and the feeding efficiency of the spiral feeding blade 32 are mutually related through the transmission unit 34, the consistency of the feeding efficiency and the feeding efficiency is convenient to keep, and the machine is prevented from being blocked due to excessive feeding; and after the extrusion feeding of working bin 11 and the feed process of feeding storehouse 12 are steady, according to the height of the surplus material volume in feeding storehouse 12, go upward a certain distance through lift drive unit 25 drive adjusting plug 26 along discharge gate 24, and then adjust the opening size and the discharging efficiency of discharge gate 24 for the discharging efficiency of discharge gate 24 keeps the unanimity with the feed efficiency of feeding storehouse 12, prevents that conveying pipe 23 ejection of compact is too fast, leads to gathering too much and blockking up because of the material in the feeding storehouse 12.
Referring to fig. 8, 10 and 11, the twin-screw extrusion feeding unit 15 includes a main rod 151 and a driven rod 153, the main rod 151 and the driven rod 153 are rotatably installed inside the working chamber 11, and spiral feeding blades 152 are fixedly installed on the main rod 151 and the driven rod 153; one end of the main rod 151 is in transmission connection with the motor 13, a driving gear 154 is fixedly mounted on the main rod 151, and a driven gear 155 in meshing transmission connection with the driving gear 154 is fixedly mounted on the driven rod 153; when the motor 13 is turned on, the motor 13 drives the main rod 151 to rotate, and the main rod 151 drives the driven rod 153 to rotate synchronously through the driving gear 154 and the driven gear 155, so that the spiral feeding blades 152 on the main rod 151 and the driven rod 153 rotate synchronously to extrude and convey the mixed materials in the working bin 11.
Referring to fig. 3 and 4, a connecting sleeve 22 is fixedly mounted at the lower end of the feeding pipe 23, a plurality of brackets 21 distributed at equal angles are fixedly mounted on the outer ring of the connecting sleeve 22, the bottom ends of the brackets 21 are all connected and mounted on the feeding bin 12, and the feeding pipe 23 is mounted on the feeding bin 12 through the brackets 21 and the connecting sleeve 22, so that the feeding pipe 23 is conveniently aligned with the feeding bin 12, and the feeding pipe 23 can be supported in an auxiliary manner, so that the feeding pipe 23 is firmly mounted, and feeding is more stable.
Referring to fig. 3, 4 and 5, the lifting driving unit 25 includes a rotating sleeve 251, the rotating sleeve 251 is movably sleeved on the upper end of the rotating shaft 31, an inner ring of the rotating sleeve 251 is fixedly connected with a plurality of sliding blocks 252, the rotating shaft 31 is provided with a plurality of sliding grooves 253 in one-to-one corresponding sliding connection with the sliding blocks 252, an outer ring of the rotating sleeve 251 is fixedly provided with a plurality of screw blades 254, a top surface of the rotating sleeve 251 is fixedly provided with a plurality of connecting rods 255, and top ends of the connecting rods 255 are connected to a bottom surface of the adjusting plug 26; when the rotating shaft 31 rotates to drive the spiral feeding blade 32 to feed, the rotating shaft 31 drives the rotating sleeve 251 to synchronously rotate through the limiting action of the sliding block 252 and the sliding groove 253, the rotating sleeve 251 drives the outer spiral blade 254 to rotate when rotating, the spiral blade 254 rotates to generate upward thrust through disturbing air flow, and the thrust generated by the rotation of the spiral blade 254 in the air is smaller than the gravity of the lifting driving unit 25 and the adjusting plug 26, so that the lifting driving unit 25 and the adjusting plug 26 do not move upward under the thrust action, when the feeding speed of the feeding pipe 23 is greater than the feeding speed of the feeding bin 12, so that the mixed material rises to the position of the spiral blade 254 in the feeding bin 12, the spiral blade 254 rotates in the mixed material, and the spiral blade 254 rises upward under the hydraulic thrust of the mixed material during the rotation process of the spiral blade 254, so that the spiral blade 254 rises synchronously with the liquid level of the mixed material, the adjusting plug 26 is driven to rise synchronously through the connecting rod 255, the adjusting plug 26 is gradually inserted into the discharging bin 24, so that the opening of the discharging port 24 is gradually reduced, the discharging efficiency of the discharging port is gradually until the feeding efficiency of the feeding blade 24 is the same as that the feeding efficiency of the feeding bin 12, and the mixed material is no longer kept at the same as the feeding efficiency of the feeding blade, and the mixed material is prevented from rising of the mixed material, and the mixed material is kept at the normal cooling liquid level, and the mixed material.
Referring to fig. 6 and 7, a top plate 256 is fixedly mounted at the top end of the rotating shaft 31 through a bolt, and an outer ring of the top plate 256 is in sealing contact with the opening of the sliding groove 253, so that the top plate 256 can seal the opening of the sliding groove 253 to prevent the sliding block 252 from sliding out of the sliding groove 253.
Referring to fig. 4, 8, 9 and 11, the transmission unit 34 includes a transmission shaft 341, a drive bevel gear 343 and a driven bevel gear 344, the transmission shaft 341 is rotatably mounted on the bottom plate of the working chamber 11, the drive bevel gear 343 is fixedly mounted on the main rod 151, the driven bevel gear 344 is fixedly mounted on the transmission shaft 341, and the drive bevel gear 343 is in meshing transmission with the driven bevel gear 344; a driving wheel 345 is fixedly mounted on the transmission shaft 341, a driven wheel 346 is fixedly mounted on the rotating shaft 31, and the driving wheel 345 and the driven wheel 346 are in transmission connection through a transmission belt 342; when the motor 13 drives the main rod 151 to rotate, the main rod 151 drives the driving bevel gear 343 to rotate, the driving bevel gear 343 engages with and drives the driven bevel gear 344 to rotate, and further drives the transmission shaft 341 to rotate, the transmission shaft 341 drives the driving wheel 345 to rotate, and the driving wheel 345 drives the driven wheel 346 to rotate through the transmission belt 342, so as to drive the rotating shaft 31 to rotate, so that the rotating shaft 31 can be synchronously driven to rotate through the transmission of the transmission unit 34 when the motor 13 drives the main rod 151 to rotate.
Referring to fig. 4 and 9, a material guide plate 33 disposed obliquely below the feeding bin 12 is fixedly installed inside the working bin 11, a lower end of the rotating shaft 31 extends below the material guide plate 33, and the transmission unit 34 is installed below the material guide plate 33; the stock guide 33 can be with the combined material direction of feeding storehouse 12 bottom carry in the working bin 11 to the direction of the combined material of being convenient for is carried, and the stock guide 33 can keep apart the drive unit 34 and the combined material of below, thereby protects drive unit 34, ensures drive unit 34's normal work.
The use mode is as follows:
firstly, a mixed material is conveyed into a feeding bin 12 through a feeding pipe 23 and falls into a working bin 11 through the feeding bin 12, at the moment, a motor 13 and an electric heating ring 16 are started, the motor 13 drives a main rod 151 to rotate, the main rod 151 drives a driven rod 153 to synchronously rotate through a driving gear 154 and a driven gear 155, further, spiral feeding blades 152 on the main rod 151 and the driven rod 153 synchronously rotate, and the mixed material in the working bin 11 is extruded and conveyed until the mixed material is shaped through a discharge hole in a discharge template 14 and then is extruded and discharged;
when the main rod 151 rotates, the main rod 151 drives the driving bevel gear 343 to rotate, the driving bevel gear 343 is meshed with the driving bevel gear 344 to drive the driven bevel gear 344 to rotate, the transmission shaft 341 drives the driving wheel 345 to rotate, the driving wheel 345 drives the driven wheel 346 to rotate through the transmission belt 342, so that the rotating shaft 31 is driven to rotate, the spiral feeding blade 32 on the rotating shaft 31 is driven to rotate when the rotating shaft 31 rotates, the mixture in the feeding bin 12 is extruded and conveyed into the working bin 11 below to be fed in the rotating process of the spiral feeding blade 32, and the efficiency and the strength of feeding the feeding bin 12 into the working bin 11 can be improved;
when the rotating shaft 31 rotates, the rotating sleeve 251 is driven to synchronously rotate through the limiting action of the sliding block 252 and the sliding groove 253, the rotating sleeve 251 drives the outer ring of the screw blade 254 to rotate when rotating, when the feeding speed of the feeding pipe 23 is greater than the feeding speed of the feeding bin 12, and the mixed material rises to the position of the screw blade 254 in the feeding bin 12, the screw blade 254 rotates in the mixed material, and the screw blade 254 moves upwards under the hydraulic thrust action of the mixed material in the rotating process of the screw blade 254, so that the screw blade 254 moves upwards synchronously along with the liquid level of the mixed material, and the adjusting plug 26 is driven to move upwards synchronously through the connecting rod 255, so that the adjusting plug 26 is gradually inserted into the discharging port 24, the opening of the discharging port 24 is gradually reduced, the discharging efficiency is gradually reduced until the discharging efficiency of the discharging port 24 is the same as the feeding efficiency of the feeding bin 12, at this time, the liquid level of the mixed material in the feeding bin 12 does not rise any more, and the screw blade 254 is located in the liquid level of the mixed material, the mixed material is continuously stirred, the liquid level position of the mixed material is prevented from being cooled and condensed, and the mixed material can be continuously and normally conveyed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. The extruder is characterized by comprising an extruding mechanism, wherein a working bin is arranged in the extruding mechanism, a feeding bin is fixedly mounted at one end of the top surface of the working bin, a double-screw extruding and feeding unit is mounted in the working bin, a motor in transmission connection with the double-screw extruding and feeding unit is mounted at one end of the working bin, a discharging template is fixedly mounted at the other end of the working bin, and an electric heating ring is mounted on the inner wall of the working bin; the feeding bin is provided with a feeding adjusting mechanism for adjusting feeding amount, and a feeding mechanism for assisting feeding to the working bin is arranged in the feeding bin;
the feeding adjusting mechanism comprises a feeding pipe arranged above the feeding bin, a discharging port is formed in the bottom end of the feeding pipe, a lifting driving unit and an adjusting plug are arranged below the discharging port, and the adjusting plug is arranged at the lower end of the inside of the discharging port in a lifting mode through the lifting driving unit; the feeding mechanism comprises a rotating shaft, the rotating shaft is vertically arranged in the feeding bin, the bottom end of the rotating shaft is rotatably arranged on a bottom plate of the working bin, the bottom end of the rotating shaft is in transmission connection with the double-screw extrusion feeding unit through a transmission unit, and a spiral feeding blade is fixedly arranged on the rotating shaft; in the process of driving the double-screw extrusion feeding unit to rotate and work by the motor, the double-screw extrusion feeding unit drives the rotating shaft and the spiral feeding blade to rotate through the transmission unit, auxiliary feeding is carried out through the rotary extrusion of the spiral feeding blade, a connecting sleeve is fixedly arranged at the lower end part of the feeding pipe, a plurality of brackets which are distributed at equal angles are fixedly arranged on the outer ring of the connecting sleeve, the bottom ends of the brackets are connected and arranged on the feeding bin, the double-screw extrusion feeding unit comprises a main rod and a driven rod, the main rod and the driven rod are both rotatably arranged in the working bin, and the spiral feeding blade is both fixedly arranged on the main rod and the driven rod; one end of the main rod is in transmission connection with the motor, a driving gear is fixedly mounted on the main rod, and a driven gear in meshing transmission connection with the driving gear is fixedly mounted on the driven rod; the transmission unit comprises a transmission shaft, a driving bevel gear and a driven bevel gear, the transmission shaft is rotatably mounted on a bottom plate of the working bin, the driving bevel gear is fixedly mounted on the main rod, the driven bevel gear is fixedly mounted on the transmission shaft, and the driving bevel gear is in meshing transmission connection with the driven bevel gear; the lifting driving unit comprises a rotating sleeve, the rotating sleeve is movably sleeved at the upper end of the rotating shaft, a plurality of sliders are fixedly connected to the inner ring of the rotating sleeve, a plurality of sliding chutes which are in one-to-one sliding connection with the sliders are arranged in the rotating shaft, a plurality of propeller blades are fixedly mounted on the outer ring of the rotating sleeve, a plurality of connecting rods are fixedly mounted on the top surface of the rotating sleeve, and the top ends of the connecting rods are connected to the bottom surface of the adjusting plug.
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| CN102660004A (en) * | 2012-05-08 | 2012-09-12 | 姚榕楠 | Method for preparing neopentyl glycol (NPG) and SiO2 copolymerization-modified polyethylene terephthalate glycol (PETG) polyester |
| CN202540687U (en) * | 2012-04-16 | 2012-11-21 | 天津奇澳科技发展有限公司 | Special tapered double-screw extruder for wood-plastic composite material |
| CN104910590A (en) * | 2015-05-06 | 2015-09-16 | 浙江久灵塑料制品有限公司 | Cosmetic plastic packaging material and preparation method thereof |
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| TWI316513B (en) * | 2001-07-02 | 2009-11-01 | Ciba Sc Holding Ag | Highly compatible hydroxyphenyltriazine uv-absorbers |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202540687U (en) * | 2012-04-16 | 2012-11-21 | 天津奇澳科技发展有限公司 | Special tapered double-screw extruder for wood-plastic composite material |
| CN102660004A (en) * | 2012-05-08 | 2012-09-12 | 姚榕楠 | Method for preparing neopentyl glycol (NPG) and SiO2 copolymerization-modified polyethylene terephthalate glycol (PETG) polyester |
| CN104910590A (en) * | 2015-05-06 | 2015-09-16 | 浙江久灵塑料制品有限公司 | Cosmetic plastic packaging material and preparation method thereof |
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