CN113234301B - Preparation method of isotropic PEEK blown film - Google Patents
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- CN113234301B CN113234301B CN202110410200.4A CN202110410200A CN113234301B CN 113234301 B CN113234301 B CN 113234301B CN 202110410200 A CN202110410200 A CN 202110410200A CN 113234301 B CN113234301 B CN 113234301B
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- 239000004696 Poly ether ether ketone Substances 0.000 title claims abstract description 74
- 229920002530 polyetherether ketone Polymers 0.000 title claims abstract description 74
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 title claims abstract 18
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 43
- 238000000071 blow moulding Methods 0.000 claims abstract description 39
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 28
- 239000000155 melt Substances 0.000 claims abstract description 21
- 238000007664 blowing Methods 0.000 claims abstract description 19
- 239000011787 zinc oxide Substances 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 238000003825 pressing Methods 0.000 claims abstract description 15
- 238000005096 rolling process Methods 0.000 claims abstract description 15
- 239000000314 lubricant Substances 0.000 claims abstract description 8
- 239000012528 membrane Substances 0.000 claims abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000002667 nucleating agent Substances 0.000 claims description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 5
- 235000013539 calcium stearate Nutrition 0.000 claims description 5
- 239000008116 calcium stearate Substances 0.000 claims description 5
- 235000012239 silicon dioxide Nutrition 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 claims description 4
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 4
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000292 calcium oxide Substances 0.000 claims description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 2
- 235000019359 magnesium stearate Nutrition 0.000 claims description 2
- 238000006116 polymerization reaction Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 2
- 235000012054 meals Nutrition 0.000 claims 1
- 230000000052 comparative effect Effects 0.000 description 7
- 238000010101 extrusion blow moulding Methods 0.000 description 7
- 241001455273 Tetrapoda Species 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000000843 powder Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000006911 nucleation Effects 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 1
- 239000012761 high-performance material Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920006260 polyaryletherketone Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229920006302 stretch film Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2361/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
- C08J2361/04—Condensation polymers of aldehydes or ketones with phenols only
- C08J2361/16—Condensation polymers of aldehydes or ketones with phenols only of ketones with phenols
-
- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/08—Oxygen-containing compounds
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a preparation method of an isotropic PEEK blown film, which comprises the following steps: the method comprises the steps of uniformly mixing materials including PEEK, tetrapod-shaped zinc oxide whiskers and a lubricant, then putting the materials into a screw extruder to melt to obtain a melt, blowing the melt after being released from a mold under the action of positive pressure hot air after passing through a mold of a blow molding machine, stably blowing an obtained membrane by adopting an air ring in the blowing process, rolling the membrane into a film by a film pressing device connected with the blow molding machine, and finally rolling the film to obtain an isotropic PEEK blown film. According to the invention, the PEEK blow molding can obtain an isotropic PEEK blow molding film with the thickness of less than 0.5mm and the thickness dimension tolerance of +/-0.02 mm, and the obtained PEEK blow molding film has good wear resistance and strength and toughness with equivalent orientation properties.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a preparation method of an isotropic PEEK blown film.
Background
Polyether ether ketone (PEEK) is one of the most representative varieties of polyaryletherketone polymers, and is a material with the best comprehensive performance in thermoplastic resins. The structure of the self-body has benzene ring structure, so that the self-body has excellent mechanical properties and also has excellent high temperature resistance, corrosion resistance, flame retardance, irradiation resistance and the like. Along with the continuous expansion of the requirements for high-performance materials, the global yield of PEEK materials is rapidly expanded, and the PEEK materials can be applied to the fields of automobiles, machining, aerospace, biomedical and electronic appliances.
In order to improve the application range of PEEK, sectional materials, parts of products and the like of the plate bar can be processed through injection molding or extrusion. And PEEK film is widely accepted in the working condition environment with extremely high insulation performance in the electronic semiconductor industry and the electrical machinery industry. Current methods of preparing PEEK films are typically cast and stretch films. The PEEK cast film is obtained by adopting a T-type die extrusion casting method, and a non-stretching non-oriented film obtained by melt casting quenching has poor strength; the PEEK stretched film adopts biaxial stretching to obtain an oriented film, although the strength is good, the toughness is poor, the thickness of the biaxial stretching film is thicker (0.5 mm-5 mm), the dimensional tolerance of the thickness is +/-0.03 mm, and the PEEK stretched film also needs to be subjected to edge cutting, so that materials are wasted. It is a challenge to obtain PEEK films with a thinner thickness, higher accuracy and better overall properties to expand their application area.
Disclosure of Invention
In order to solve the technical problems of thicker film thickness, low precision and poor comprehensive performance of the conventional film, the preparation method of the isotropic PEEK blown film is provided. According to the invention, the PEEK blow molding can obtain an isotropic PEEK blow molding film with the thickness of less than 0.5mm and the thickness dimension tolerance of +/-0.02 mm, and the obtained PEEK blow molding film has good wear resistance and strength and toughness with equivalent orientation properties. The isotropic PEEK blown film has good comprehensive performance.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
a method for preparing an isotropic PEEK blown film, comprising the following steps:
the method comprises the steps of uniformly mixing materials including PEEK, tetrapod-shaped zinc oxide whiskers and a lubricant, then putting the materials into a screw extruder to melt to obtain a melt, blowing the melt after being released from a mold under the action of positive pressure hot air after passing through a mold of a blow molding machine, stably blowing an obtained membrane by adopting an air ring in the blowing process, rolling the membrane into a film by a film pressing device connected with the blow molding machine, and finally rolling the film to obtain an isotropic PEEK blown film.
Further, the mass ratio of PEEK to tetrapod-like zinc oxide whisker to lubricant in the melt is (97-99.8): 0.1-1.
Still further, the PEEK is a coarse powder that has not been pelletized after polymerization. The coarse powder has uneven size and uneven shape.
Still further, the melt also includes an inorganic nucleating agent; the dosage of the inorganic nucleating agent accounts for 0.1-1% of the material.
Still further, the inorganic nucleating agent is one or more of calcium oxide, titanium dioxide and silicon dioxide.
Further, the lubricant is one or more of zinc stearate, magnesium stearate and calcium stearate.
Further, the mixing speed of the materials is 1000 rpm-2000 rpm, the mixing time is 3 min-20 min, and the materials are required to be cooled in real time in the mixing process.
Further, the barrel of the screw extruder comprises a zone 1, a zone 2, a zone 3 and a flange zone connected with the blow molding machine, and the temperatures of the zones are as follows: zone 1 200-350 ℃, zone 2 350-390 ℃, zone 3 350-390 ℃ and flange zone 350-390 ℃; the screw rotation speed of the screw extruder is 5 rpm-40 rpm.
Still further, the blow molding machine comprises a mold connected with the flange area, wherein the interior of the mold is communicated with the positive pressure hot air, and the periphery of the mold is also connected with the air ring; the temperature of the die is 350-390 ℃; the pressure of the positive pressure hot air is 0.2 MPa-0.8 MPa, and the temperature is 200-300 ℃; the pressure of the air ring is 0.2 MPa-0.8 MPa, and the temperature is 200-300 ℃.
The beneficial technical effects are as follows:
according to the invention, PEEK and tetrapod-like zinc oxide whiskers are mixed and then are fused and blow-molded into a film, and because the tetrapod-like zinc oxide whiskers have a special microstructure and have whiskers in four directions, the tetrapod-like zinc oxide whiskers can be uniformly existing in PEEK in a fusing stage, and the nucleation speed of a PEEK film can be accelerated after blow-molding orientation, so that PEEK has the characteristic of isotropy, the crystallization speed of the PEEK film in all directions is uniform, the overall shrinkage is uniform, and the dimension uniformity of the PEEK film is good. The obtained blown film has equivalent strength and toughness in the transverse and longitudinal directions; the lubricant can be used for mixing PEEK coarse powder with different sizes and shapes with the nucleating agent more uniformly, so that the nucleation speed of the melt of the material in the blow molding process is basically kept consistent. According to the invention, the PEEK blow molding can obtain an isotropic PEEK blow molding film with the thickness of less than 0.5mm and the thickness dimension tolerance of +/-0.02 mm, and the obtained PEEK blow molding film has good wear resistance and strength and toughness with equivalent orientation properties. The isotropic PEEK blown film has good comprehensive performance.
Drawings
FIG. 1 is a schematic view of the apparatus of an extrusion-blow molding machine.
Wherein, 1: barrel of screw extruder, 1-1: zone 1, 1-2: zone 2, 1-3: zone 3, 1-4: flange area, 2: wind ring, 3: die, 4: positive pressure hot air, 5: film pressing device, 6: and a winding device.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The numerical values set forth in these examples do not limit the scope of the present invention unless specifically stated otherwise. Techniques, methods known to those of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values.
Example 1
A method for preparing an isotropic PEEK blown film, comprising the following steps:
99.6kg of PEEK, 0.1kg of titanium dioxide, 0.2kg of tetrapod-like whisker zinc oxide (T-ZnOw) and 0.1kg of zinc stearate are added into a high-speed mixer in a high-speed physical mixing mode, and are mixed for 10min under the conditions of 1200rpm and water cooling;
the materials which are uniformly mixed are put into an extrusion-blow molding machine for melting, blow molding and film pressing and winding to form a film, the equipment structure diagram of the specific extrusion-blow molding machine is shown in figure 1, as can be seen from figure 1, the machine barrel of a screw extruder 1 comprises a 1 region 1-1, a 2 region 1-2, a 3 region 1-3 and a flange region 1-4 connected with the blow molding machine, the blow molding machine comprises an air ring 2, a mold 3, a film pressing device 5 and a winding device 6, the flange region 1-4 of the screw extruder 1 is connected with the mold 3 of the blow molding machine, the interior of the mold 3 is communicated with positive pressure hot air 4, and the periphery of the mold 3 is also connected with the air ring 2;
the specific process is as follows: the materials which are uniformly mixed are put into a screw extruder 1 to be melted to obtain a melt, the melt is blown up under the action of positive pressure hot air 4 after passing through a die 3 of a blow molding machine, a film obtained by stable blowing up is obtained by adopting a wind ring 2 in the blowing up process, then the film is rolled into a film through a film pressing device 5 connected with the blow molding machine, and finally the film is rolled up through a rolling device 6 to obtain the isotropic PEEK blown film.
The specific process parameters are shown in Table 1.
Table 1 process parameters for the PEEK blown film of example 1
Example 2
A method for preparing an isotropic PEEK blown film, comprising the following steps:
99.7kg of PEEK, 0.1kg of silicon dioxide, 0.1kg of tetrapod-like whisker zinc oxide (T-ZnOw) and 0.1kg of zinc stearate are added into a high-speed mixer in a high-speed physical mixing mode, and are mixed for 10min under the conditions of 1800rpm and water cooling;
the materials which are evenly mixed are put into an extrusion-blow molding machine shown in figure 1 for melting, blow molding and film pressing and rolling into films, and the specific process is as follows: the materials which are uniformly mixed are put into a screw extruder 1 to be melted to obtain a melt, the melt is blown up under the action of positive pressure hot air 4 after passing through a die 3 of a blow molding machine, a film obtained by stable blowing up is obtained by adopting a wind ring 2 in the blowing up process, then the film is rolled into a film through a film pressing device 5 connected with the blow molding machine, and finally the film is rolled up through a rolling device 6 to obtain the isotropic PEEK blown film.
The specific process parameters are shown in Table 2.
Table 2 process parameters for the PEEK blown film of example 2
Example 3
A method for preparing an isotropic PEEK blown film, comprising the following steps:
99.8kg of PEEK, 0.1kg of tetrapod whisker zinc oxide (T-ZnOw) and 0.1kg of calcium stearate are added into a high-speed mixer in a high-speed physical mixing mode, and are mixed for 10min under the conditions of 1800rpm and water cooling;
the materials which are evenly mixed are put into an extrusion-blow molding machine shown in figure 1 for melting, blow molding and film pressing and rolling into films, and the specific process is as follows: the materials which are uniformly mixed are put into a screw extruder 1 to be melted to obtain a melt, the melt is blown up under the action of positive pressure hot air 4 after passing through a die 3 of a blow molding machine, a film obtained by stable blowing up is obtained by adopting a wind ring 2 in the blowing up process, then the film is rolled into a film through a film pressing device 5 connected with the blow molding machine, and finally the film is rolled up through a rolling device 6 to obtain the isotropic PEEK blown film.
The specific process parameters are shown in Table 3.
Table 3 process parameters for the PEEK blown film of example 3
Example 4
A method for preparing an isotropic PEEK blown film, comprising the following steps:
99.2kg of PEEK, 0.3kg of silicon dioxide, 0.3kg of tetrapod-like whisker zinc oxide (T-ZnOw) and 0.2kg of calcium stearate are added into a high-speed mixer in a high-speed physical mixing mode, and are mixed for 10min under the conditions of 1800rpm and water cooling;
the materials which are evenly mixed are put into an extrusion-blow molding machine shown in figure 1 for melting, blow molding and film pressing and rolling into films, and the specific process is as follows: the materials which are uniformly mixed are put into a screw extruder 1 to be melted to obtain a melt, the melt is blown up under the action of positive pressure hot air 4 after passing through a die 3 of a blow molding machine, a film obtained by stable blowing up is obtained by adopting a wind ring 2 in the blowing up process, then the film is rolled into a film through a film pressing device 5 connected with the blow molding machine, and finally the film is rolled up through a rolling device 6 to obtain the isotropic PEEK blown film.
The specific process parameters are shown in Table 4.
Table 4 process parameters for the PEEK blown film of example 4
Example 5
A method for preparing an isotropic PEEK blown film, comprising the following steps:
98.7kg of PEEK, 0.8kg of tetrapod whisker zinc oxide (T-ZnOw) and 0.5kg of calcium stearate are added into a high-speed mixer in a high-speed physical mixing mode, and are mixed for 10min under the conditions of 1200rpm and water cooling;
the materials which are evenly mixed are put into an extrusion-blow molding machine shown in figure 1 for melting, blow molding and film pressing and rolling into films, and the specific process is as follows: the materials which are uniformly mixed are put into a screw extruder 1 to be melted to obtain a melt, the melt is blown up under the action of positive pressure hot air 4 after passing through a die 3 of a blow molding machine, a film obtained by stable blowing up is obtained by adopting a wind ring 2 in the blowing up process, then the film is rolled into a film through a film pressing device 5 connected with the blow molding machine, and finally the film is rolled up through a rolling device 6 to obtain the isotropic PEEK blown film.
The specific process parameters are shown in Table 5.
Table 5 process parameters for the PEEK blown film of example 5
Comparative example 1
The preparation method of the film of this comparative example was the same as in example 3, except that potassium titanate whisker was used instead of tetrapod whisker zinc oxide.
Comparative example 2
The preparation method of the film of this comparative example was the same as in example 3, except that calcium carbonate whisker was used instead of tetrapod whisker zinc oxide.
The blown films of the above examples and comparative examples were subjected to measurement of tensile strength and elongation at break, and specific data are shown in tables 6 and 7.
TABLE 6 blown film Properties of examples 1-5
As can be seen from Table 6, PEEk blown films having comparable transverse and machine direction properties, i.e., equivalent to isotropy, were obtained using the process of the present invention. Comparing example 3 with example 5, it is seen that an increase in tetrapod whisker zinc oxide will result in a decrease in the toughness of the blown film. Comparing example 2 with example 3, it can be seen that the addition of other inorganic nucleating agents has a negligible effect on the increase in the properties of each direction.
TABLE 7 blown film Properties of example 3 and comparative examples 1-2
As can be seen from Table 7, the mechanical properties of the PEEK blown film added with the tetrapod whisker zinc oxide are the same in the longitudinal direction and the transverse direction, and the other whiskers in the comparative example or the direct addition of inorganic nucleating agents such as silicon dioxide can lead to a large difference (anisotropy) in the longitudinal direction and the transverse direction of the PEEK blown film.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (7)
1. A method for preparing an isotropic PEEK blown film, which is characterized by comprising the following steps:
uniformly mixing materials including PEEK, tetrapod-like zinc oxide whiskers and a lubricant, putting the materials into a screw extruder for melting to obtain a melt, blowing the melt subjected to demolding under the action of positive pressure hot air after passing through a mold of a blow molding machine, stably blowing an obtained membrane by adopting a wind ring in the blowing process, rolling the membrane into a film by a film pressing device connected with the blow molding machine, and finally rolling the film to obtain an isotropic PEEK blown film;
the mass ratio of PEEK to tetrapod-like zinc oxide whisker to lubricant in the melt is (97-99.8) (0.1-1);
the machine barrel of the screw extruder comprises a zone 1, a zone 2 and a zone 3, and a flange zone connected with the blow molding machine, wherein the temperature of each zone is as follows: zone 1 200-350 ℃, zone 2 350-390 ℃, zone 3 350-390 ℃ and flange zone 350-390 ℃;
the blow molding machine comprises a mold connected with the flange area, wherein the interior of the mold is communicated with the positive pressure hot air, and the periphery of the mold is also connected with the air ring; the temperature of the die is 350-390 ℃; the pressure of the positive pressure hot air is 0.2 MPa-0.8 MPa, and the temperature is 200-300 ℃; the pressure of the air ring is 0.2 MPa-0.8 MPa, and the temperature is 200-300 ℃.
2. The method of producing an isotropic blown PEEK film according to claim 1, wherein PEEK is a meal that is not pelletized after polymerization.
3. The method of producing an isotropic PEEK blown film according to claim 1, wherein the melt further comprises an inorganic nucleating agent; the dosage of the inorganic nucleating agent accounts for 0.1-1% of the material.
4. A method for producing an isotropic PEEK blown film according to claim 3, wherein the inorganic nucleating agent is one or more of calcium oxide, titanium dioxide, and silicon dioxide.
5. The method for preparing an isotropic PEEK blown film according to claim 1, wherein the lubricant is one or more of zinc stearate, magnesium stearate and calcium stearate.
6. The method for preparing an isotropic PEEK blown film according to claim 1, wherein the mixing speed of the materials is 1000 rpm-2000 rpm, the mixing time is 3 min-20 min, and the materials are required to be cooled in real time during the mixing process.
7. The method for producing an isotropic PEEK blown film according to claim 1, wherein the screw speed of the screw extruder is 5rpm to 40rpm.
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Address after: 213100 no.7-16, Yangtze River Delta mold City, Wujin high tech Industrial Development Zone, Changzhou City, Jiangsu Province Patentee after: Jiangsu Junhua Special Polymer Materials Co.,Ltd. Address before: 213100 no.7-16, Yangtze River Delta mold City, Wujin high tech Industrial Development Zone, Changzhou City, Jiangsu Province Patentee before: JIANGSU JUNHUA HIGH PERFORMANCE SPECIALTY ENGINEERING PLASTICS (PEEK) PRODUCTS CO.,LTD. |