CN115612256A - Antistatic micro-foamed polyester and preparation method and application thereof - Google Patents

Antistatic micro-foamed polyester and preparation method and application thereof Download PDF

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Publication number
CN115612256A
CN115612256A CN202110808814.8A CN202110808814A CN115612256A CN 115612256 A CN115612256 A CN 115612256A CN 202110808814 A CN202110808814 A CN 202110808814A CN 115612256 A CN115612256 A CN 115612256A
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polyester
antistatic
micro
screw extruder
weight
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高俊
胡广君
方明
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Changzhou China Resources High Performance Composite Material Co ltd
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Changzhou China Resources High Performance Composite Material Co ltd
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    • 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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
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    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/32—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed at least two layers being foamed and next to each other
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    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
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    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/02—Open containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/40—Closed containers
    • B32B2439/62—Boxes, cartons, cases
    • C—CHEMISTRY; METALLURGY
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    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/06—CO2, N2 or noble gases
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/08—Supercritical fluid
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    • C08J2205/00—Foams characterised by their properties
    • C08J2205/04—Foams characterised by their properties characterised by the foam pores
    • C08J2205/044—Micropores, i.e. average diameter being between 0,1 micrometer and 0,1 millimeter
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    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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Abstract

The invention discloses antistatic micro-foaming polyester and a preparation method and application thereof, wherein the antistatic micro-foaming polyester comprises the following components in parts by weight: thermoplastic polyester, inorganic nucleating agent, antistatic agent and supercritical fluid. The antistatic micro-foamed polyester has the characteristics of low density, good toughness and excellent antistatic performance, so that a packaging box or a tray with light weight, antistatic performance and low cost can be prepared.

Description

Antistatic micro-foaming polyester and preparation method and application thereof
Technical Field
The invention belongs to the field of thermoplastic materials, and particularly relates to antistatic micro-foamed polyester and a preparation method and application thereof.
Background
Thermoplastic polyesters such as polyethylene terephthalate (PET), PETG, PC, polylactic acid, etc., an important use of which is to prepare sheets by extrusion casting, and then to form various packaging boxes and trays by plastic suction molding of the sheets, for packaging of electronic products such as LCDs, computer connectors, network cards, mice, mobile phone screens, mobile phone/smart watch touch modules, hard disk components, circuit board trays, etc.
However, thermoplastic polyester sheets have a much higher density than polyolefin sheets, e.g., PET sheets having a density of 1.34g/cm 3 PETG sheet density of 1.27g/cm 3 PLA sheet density 1.25g/cm 3 PC sheet density 1.2g/cm 3 Comparison with PS sheet (1.05 g/cm) 3 ) And PP sheet (0.96 g/cm) 3 ) The weight of the packaging box or the electronic tray is larger than that of PP and PS, the cost is relatively increased, the cost performance is reduced, and the application range is limited.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, an object of the present invention is to propose an antistatic microcellular polyester, a method for preparing the same, and applications thereof, which has the characteristics of low density, good toughness, and excellent antistatic performance, thereby making it possible to prepare a lightweight, antistatic, and low-cost packaging box or tray.
In one aspect of the invention, an antistatic micro-foamed polyester is provided. According to an embodiment of the invention, the antistatic micro-foamed polyester comprises: thermoplastic polyester, inorganic nucleating agent, antistatic agent and supercritical fluid. Therefore, the antistatic microcellular polyester has the characteristics of low density, good toughness and excellent antistatic performance, so that a packaging box or a tray which is light in weight, antistatic and low in cost can be prepared.
In addition, the antistatic micro-foamed polyester according to the above embodiment of the present invention may also have the following additional technical features:
in some embodiments of the present invention, the mass ratio of the thermoplastic polyester, the inorganic nucleating agent, the antistatic agent and the supercritical fluid is (64 to 95): (5-25): (0.1-10): (0.01-0.1). Thus, the antistatic microcellular foamed polyester with the characteristics of low density, good toughness and excellent antistatic performance can be prepared.
In some embodiments of the invention, the thermoplastic polyester comprises at least one of PET, PETG, PC, and PLA.
In some embodiments of the invention, the inorganic nucleating agent comprises at least one of talc, silica, montmorillonite, calcium carbonate and mica powder.
In some embodiments of the present invention, the antistatic agent comprises at least one of sodium dodecylbenzenesulfonate, octadecyl phosphate, sorbitol ester, carbon black, carbon nanotubes, graphene, and metal filler. Thus, a microcellular polyester excellent in antistatic properties can be produced.
In some embodiments of the invention, the supercritical fluid comprises at least one of carbon dioxide, nitrogen, alkanes, and fluorides. Thus, a microcellular foamed polyester sheet having excellent antistatic properties can be prepared.
In yet another aspect of the invention, a method of making an antistatic microcellular polyester is provided. According to an embodiment of the invention, the method comprises: feeding the thermoplastic polyester, the inorganic nucleating agent, the antistatic agent and the supercritical fluid into a double-screw extruder for extrusion molding. Thus, microcellular polyesters having characteristics of low density, good toughness, and excellent antistatic properties can be prepared, and thus, a packaging box or tray having light weight, antistatic properties, and low cost can be prepared.
In a third aspect of the present invention, an antistatic micro-foamed polyester sheet is presented. According to an embodiment of the present invention, the antistatic micro-foamed polyester sheet comprises:
a first polyester layer;
a second polyester layer comprising the above antistatic micro-foamed polyester or the antistatic micro-foamed polyester obtained by the above method, and the first polyester layer being formed on an upper surface of the second polyester layer;
a third polyester layer formed on a lower surface of the second polyester layer.
According to the antistatic micro-foaming polyester sheet provided by the embodiment of the invention, the second polyester layer is prepared by adopting the micro-foaming polyester with the characteristics of low density, good toughness and excellent antistatic performance, and then the first polyester layer and the third polyester layer which comprise polyester are respectively formed on the upper surface and the lower surface of the second polyester layer, so that the obtained antistatic micro-foaming polyester sheet has low density, antistatic performance and good mechanical performance, and in addition, the bonding performance of the second polyester layer in the antistatic micro-foaming polyester sheet with the first polyester layer and the third polyester layer is excellent.
In addition, the antistatic micro-foamed polyester sheet according to the above embodiment of the present invention may also have the following additional technical features:
in some embodiments of the invention, the antistatic micro-foamed polyester sheet has a thickness of 0.15 to 1.5mm.
In some embodiments of the invention, the thickness ratio of the first, second and third polyester layers is (5-10): (80-90): (5-10).
In a fourth aspect of the invention, the invention proposes a process for preparing the antistatic micro-foamed polyester sheet described above. According to an embodiment of the invention, the method comprises: feeding thermoplastic polyester, an inorganic nucleating agent, an antistatic agent and a supercritical fluid into a double-screw extruder, simultaneously feeding the polyester into a single-screw extruder, and then co-extruding to obtain the antistatic micro-foamed polyester sheet.
According to the method for preparing the antistatic micro-foaming polyester sheet, the micro-foaming polyester sheet with low density, antistatic property and good mechanical property can be prepared, and the bonding property of the second polyester layer and the first polyester layer and the third polyester layer in the antistatic micro-foaming polyester sheet is excellent.
In a fifth aspect of the invention, a package or tray is provided. According to an embodiment of the present invention, the packing box or the tray is made of the antistatic micro-foamed polyester sheet or the antistatic micro-foamed polyester sheet obtained by the method. From this, this packing carton or tray have lightweight, antistatic and with low costs characteristic to can satisfy the packing demand of LCD, computer connector, network card, mouse, cell-phone screen, cell-phone/intelligent wrist-watch touch module, electronic product such as hard disk part, circuit board tray.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of an antistatic micro-foamed polyester sheet according to one embodiment of the present invention;
fig. 2 is an SEM image of an antistatic micro-foamed polyester according to one embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In one aspect of the invention, an antistatic micro-foamed polyester is provided. According to an embodiment of the invention, the antistatic micro-foamed polyester comprises: thermoplastic polyester, inorganic nucleating agent, antistatic agent and supercritical fluid. The inventor finds that by mixing thermoplastic polyester, inorganic nucleating agent, antistatic agent and supercritical fluid, wherein the inorganic nucleating agent can be dispersed into micron-sized particles to trigger the supercritical fluid to form bubble nuclei, the antistatic agent can provide antistatic property and also play a role in nucleation; the supercritical fluid can reduce the interfacial tension of the thermoplastic polyester, so that the inorganic nucleating agent and the antistatic agent are more easily dispersed in the thermoplastic polyester to form a uniform dispersion system, the uniformly dispersed inorganic nucleating agent can enable the supersaturated supercritical fluid in the extrusion system to form more bubble nuclei when the melt pressure is reduced, and thus microcells with the size of about 200 mu m are formed, and the uniformly dispersed antistatic agent is more easily formed into a continuous conductive path, so that the prepared sheet has an excellent antistatic effect. And the supercritical fluid can be used as a foaming agent, and the low-density antistatic micro-foaming polyester with uniform cells can be prepared without an additional foaming agent. Therefore, the antistatic micro-foaming polyester with the composition has the characteristics of low density (the density is 50-85% of the original material), good toughness and excellent antistatic performance, so that a packaging box or a tray with light weight, static resistance and low cost can be prepared.
Further, the mass ratio of the thermoplastic polyester, the inorganic nucleating agent, the antistatic agent and the supercritical fluid in the antistatic micro-foamed polyester is (64-95): (5-25): (0.1-10): (0.01-0.1). The inventor finds that when the content of the thermoplastic polyester is too high, the density of the prepared sheet is too high, the weight reduction effect is not obvious, and when the content of the thermoplastic polyester is too low, the strength of the sheet is too low, and the sheet has no use value; when the content of the inorganic nucleating agent is too high, the strength of the sheet is poor and cannot be accepted by customers due to too much inorganic substances, and when the content of the inorganic nucleating agent is too low, nucleation points are too few, cells are enlarged, the strength of the sheet is poor, and the sheet is easy to break after being stretched; when the content of the antistatic agent is too high, the cost is too high, and when the content of the antistatic agent is too low, the antistatic effect of the sheet becomes insignificant; when the content of the supercritical fluid is too high, the density of the sheet is too low, and the strength becomes poor, and when the content of the supercritical fluid is too low, the density of the sheet is too high, and the weight reduction effect is not obvious. Therefore, the antistatic micro-foamed polyester with the composition has the characteristics of low density (the density is 50-85 percent of the original material), good toughness and excellent antistatic performance.
Meanwhile, the thermoplastic polyester in the antistatic micro-foamed polyester composition includes but is not limited to at least one of PET, PETG, PC and PLA; the inorganic nucleating agent comprises at least one of talcum powder, silicon dioxide, montmorillonite, calcium carbonate and mica powder; the antistatic agent includes at least one of sodium dodecylbenzenesulfonate, octadecyl phosphate, sorbitol ester, carbon black, carbon nanotube, graphene and metal filler, especially carbon black, carbon nanotube, graphene and metal filler, which provides conductivity while also performing a nucleating function, for example, the metal filler is silver.
Further, the supercritical fluid includes but is not limited to at least one of carbon dioxide, nitrogen, alkane and fluoride, for example, the alkane may be n-pentane, cyclopentane, etc., the fluoride may be freon, etc., the supercritical fluid added in the present application is used as a surfactant and simultaneously as a foaming agent, and a low-density antistatic micro-foamed polyester with uniform cells can be prepared without an additional foaming agent. The preferred supercritical fluid is a fluoride, which has stronger molecular polarity, larger acting force with the thermoplastic polyester and better effect of reducing interfacial tension compared with other supercritical fluids (carbon dioxide, nitrogen and alkane).
Preferably, the inorganic nucleating agent is montmorillonite, the antistatic agent is sodium dodecyl benzene sulfonate, and the supercritical fluid can reduce the interfacial tension between the inorganic nucleating agent and the antistatic agent, so that the sodium dodecyl benzene sulfonate is easier to insert between the sheets of the montmorillonite, and the bonding force between the sheets is weakened, therefore, the sheets of the montmorillonite are easier to open under the shearing action of the twin-screw, a nanoscale sheet dispersion state is formed, the nucleating efficiency is greatly increased, and the density reduction effect of the sheets is particularly obvious.
In a further aspect of the invention, the invention proposes a process for preparing the antistatic microcellular polyester described above. According to an embodiment of the present invention, a thermoplastic polyester, an inorganic nucleating agent, an antistatic agent and a supercritical fluid are supplied to a twin-screw extruder for extrusion molding. Thus, by supplying the thermoplastic polyester, the inorganic nucleating agent, the antistatic agent and the supercritical fluid to a twin-screw extruder for extrusion molding, a microcellular foamed polyester having characteristics of low density, good toughness and excellent antistatic performance can be prepared, and thus a packaging box or tray having light weight, antistatic property and low cost can be prepared.
It should be noted that the features and advantages described above for the antistatic micro-foamed polyester are also applicable to the antistatic micro-foamed polyester, and those skilled in the art can adjust the conditions of the extrusion molding process of the twin-screw extruder according to actual needs, and will not be described herein again.
In a third aspect of the invention, an antistatic micro-foamed polyester sheet is provided. According to an embodiment of the present invention, referring to fig. 1, the antistatic micro-foamed polyester sheet includes a first polyester layer 100, a second polyester layer 200, and a third polyester layer 300, wherein the second polyester layer 200 includes the above-described antistatic micro-foamed polyester or the antistatic micro-foamed polyester obtained using the above-described method, and the first polyester layer 100 is formed on the upper surface of the second polyester layer 200, the third polyester layer 300 is formed on the lower surface of the second polyester layer 200, and the first polyester layer 100 and the third polyester layer 300 each independently include a polyester.
The inventors found that by preparing a second polyester layer using the above microcellular polyester having characteristics of low density, good toughness, and excellent antistatic properties, and then forming a first polyester layer and a third polyester layer including polyester on the upper and lower surfaces of the second polyester layer, respectively, the resulting antistatic microcellular polyester sheet has low density, antistatic properties, and good mechanical properties, and in addition, the second polyester layer is excellent in bonding properties with the first polyester layer and the third polyester layer in the antistatic microcellular polyester sheet.
Furthermore, the thickness of the antistatic micro-foamed polyester sheet is 0.15-1.5mm. And the thickness ratio of the first polyester layer, the second polyester layer and the third polyester layer is (5-10): (80-90): (5 to 10), the inventors found that when the thicknesses of the first polyester layer and the third polyester layer are too high, the density of the sheet is too high and the weight reduction effect is not significant because the first polyester layer and the third polyester layer are not foamed, and when the thicknesses of the first polyester layer and the third polyester layer are too low, bubbles generated in the second polyester layer in the middle cannot be wrapped, so that the bubbles run out and break, the effect of reducing the density of the sheet is poor, the weight reduction is not significant, and the surface appearance of the sheet is poor; when the thickness of the second polyester layer is too high, the density of the sheet material is too low due to too large proportion of the foaming layer, and the strength begins to deteriorate, and when the thickness of the second polyester layer is too low, the density of the sheet material is too high due to too small proportion of the foaming layer, and the weight reduction effect is not obvious. Therefore, the sheet material formed by the thickness can reduce the density of the sheet material and ensure that the sheet material has good mechanical strength.
It should be noted that the features and advantages described above for the antistatic micro-foamed polyester and the preparation method thereof are also applicable to the antistatic micro-foamed polyester sheet, and are not described herein again.
In a fourth aspect of the invention, the invention proposes a process for preparing the antistatic micro-foamed polyester sheet described above. According to an embodiment of the invention, the method comprises: feeding thermoplastic polyester, an inorganic nucleating agent, an antistatic agent and a supercritical fluid into a double-screw extruder, simultaneously feeding polyester into a single-screw extruder, and then co-extruding to obtain the antistatic micro-foamed polyester sheet.
The inventors have found that the above-mentioned microcellular foamed polyester sheet having low density, antistatic property and good mechanical properties can be prepared by feeding a thermoplastic polyester, an inorganic nucleating agent, an antistatic agent and a supercritical fluid to a twin-screw extruder while feeding the polyester to a single-screw extruder and then co-extruding, and that the antistatic microcellular foamed polyester sheet obtained by the method is excellent in the bonding property of the second polyester layer to the first polyester layer and the third polyester layer.
It should be noted that the features and advantages described above for the antistatic micro-foamed polyester sheet are also applicable to the method for preparing the antistatic micro-foamed polyester sheet, and are not described herein again.
In a fifth aspect of the invention, a package or tray is provided. According to an embodiment of the present invention, the packing box or the tray is made of the antistatic micro-foamed polyester sheet or the antistatic micro-foamed polyester sheet obtained by the method. From this, this packing carton or tray have lightweight, antistatic and with low costs characteristic to can satisfy LCD, computer connector, network card, mouse, cell-phone screen, cell-phone/intelligent wrist-watch touch module, electronic product's such as hard disk part, circuit board tray packing demand. It should be noted that the features and advantages described above for the antistatic micro-foamed polyester sheet and the preparation method thereof are also applicable to the packaging box or tray, and are not described herein again.
The following embodiments of the present invention are described in detail, and it should be noted that the following embodiments are exemplary only, and are not to be construed as limiting the present invention. In addition, all reagents used in the following examples are commercially available or can be synthesized according to methods herein or known, and are readily available to one skilled in the art for reaction conditions not listed, if not explicitly stated.
Example 1
Weighing 100 parts by weight of PET 8828, putting the PET 8828 into a dehumidifying dryer, drying the PET in the dehumidifying dryer at the dew point of-40 ℃ for 4 hours at the temperature of 160 ℃, adding 85 parts by weight of PET 8828 into a double-screw extruder, and adding 15 parts by weight of PET 8828 into a single-screw extruder; simultaneously adding 5 parts by weight of calcium carbonate and 10 parts by weight of sodium dodecyl benzene sulfonate into a double-screw extruder; adding 0.01 weight part of supercritical CO 2 Injecting into a double-screw extruder, controlling the temperature of the single-screw extruder to be 265-280 ℃, the temperature of the double-screw extruder to be 270-285 ℃, the temperature of a three-layer melt distributor to be 270 ℃, the temperature of a die lip to be 265 ℃, the temperature of a three-cooling roller to be 26 ℃/28 ℃/28 ℃, and preparing the antistatic agent with the thickness of 0.2mmAn electrically micro-foamed PET sheet (thickness ratio of the first, second and third polyester layers was 10. The results of the performance tests are shown in Table 1.
Example 2
Weighing 100 parts by weight of PET 8828, putting the PET 8828 into a dehumidifying dryer, drying the PET in the dehumidifying dryer at the dew point of-40 ℃ for 4 hours at the temperature of 160 ℃, and then adding 85 parts by weight of PET 8828 into a double-screw extruder and 15 parts by weight of PET 8828 into a single-screw extruder; simultaneously adding 10 parts by weight of mica powder and 5 parts by weight of carbon black into a double-screw extruder; adding 0.03 weight part of supercritical N 2 And (2) injecting the mixture into a double-screw extruder, controlling the temperature of the single-screw extruder to be 265-280 ℃, the temperature of the double-screw extruder to be 270-285 ℃, the temperature of a three-layer melt distributor to be 270 ℃, the temperature of a die lip to be 265 ℃ and the temperature of a three cooling roll to be 26 ℃/28 ℃/28 ℃, and preparing the antistatic micro-foaming PET sheet with the thickness of 0.7mm (the thickness ratio of the first polyester layer to the second polyester layer to the third polyester layer is 7.5. The results of the performance tests are shown in Table 1.
Example 3
Weighing 100 parts by weight of PET 8828, putting the PET 8828 into a dehumidifying dryer, drying at the dew point of-40 ℃ for 4 hours at 160 ℃, adding 83 parts by weight of PET 8828 into a double-screw extruder, and adding 17 parts by weight of PET 8828 into a single-screw extruder; simultaneously adding SiO into a double-screw extruder 2 15 parts by weight, 2 parts by weight of carbon nanotubes; injecting 0.05 part by weight of supercritical cyclopentane into a double-screw extruder, controlling the temperature of the single-screw extruder to be 265-280 ℃, the temperature of the double-screw extruder to be 270-285 ℃, the temperature of a three-layer melt distributor to be 270 ℃, the temperature of a die lip to be 265 ℃, the temperature of a three cooling roll to be 26 ℃/28 ℃/28 ℃, and preparing the antistatic micro-foaming PET sheet with the thickness of 1.0mm (the thickness ratio of a first polyester layer to a second polyester layer to a third polyester layer is 5. The results of the performance tests are shown in table 1.
Example 4
Weighing 100 parts by weight of PET 8828, putting the PET 8828 into a dehumidifying dryer, drying at the dew point of-40 ℃ for 4 hours at 160 ℃, adding 79 parts by weight of PET 8828 into a double-screw extruder, and adding 21 parts by weight of PET 8828 into a single-screw extruder; simultaneously adding 20 parts by weight of montmorillonite and 1 part by weight of graphene into a double-screw extruder; injecting 0.07 part by weight of supercritical cyclopentane into a twin-screw extruder, controlling the temperature of the single-screw extruder to be 265-280 ℃, the temperature of the twin-screw extruder to be 270-285 ℃, the temperature of a three-layer melt distributor to be 270 ℃, the temperature of a die lip to be 265 ℃, and the temperature of a three cooling roll to be 26 ℃/28 ℃/28 ℃, and preparing the antistatic micro-foamed PET sheet with the thickness of 1.4mm (the thickness ratio of a first polyester layer, a second polyester layer and a third polyester layer is 5. The results of the performance tests are shown in Table 1.
Example 5
Weighing 100 parts by weight of PET 8828, putting the PET 8828 into a dehumidifying dryer, drying the PET in the dehumidifying dryer at the dew point of-40 ℃ for 4 hours at the temperature of 160 ℃, adding 74.5 parts by weight of PET 8828 into a double-screw extruder, and adding 25.5 parts by weight of PET 8828 into a single-screw extruder; simultaneously adding 25 parts by weight of talcum powder and 0.5 part by weight of silver powder into a double-screw extruder; injecting 0.1 part by weight of supercritical n-pentane into a double-screw extruder, controlling the temperature of the single-screw extruder to be 265-280 ℃, the temperature of the double-screw extruder to be 270-285 ℃, the temperature of a three-layer melt distributor to be 270 ℃, the temperature of a die lip to be 265 ℃, and the temperature of a three cooling roll to be 26 ℃/28 ℃/28 ℃, and preparing the antistatic micro-foamed PET sheet with the thickness of 0.2mm (the thickness ratio of a first polyester layer to a second polyester layer to a third polyester layer is 5. The results of the performance tests are shown in Table 1.
Example 6
Weighing 100 parts by weight of PET 8828, putting the PET 8828 into a dehumidifying dryer, drying the PET in the dehumidifying dryer at the dew point of-40 ℃ for 4 hours at the temperature of 160 ℃, adding 74.5 parts by weight of PET 8828 into a double-screw extruder, and adding 25.5 parts by weight of PET 8828 into a single-screw extruder; simultaneously adding 25 parts by weight of talcum powder and 0.5 part by weight of silver powder into a double-screw extruder; injecting 0.1 part by weight of supercritical difluoromethane HFC-32 into a double-screw extruder, controlling the temperature of the single-screw extruder to be 265-280 ℃, the temperature of the double-screw extruder to be 270-285 ℃, the temperature of a three-layer melt distributor to be 270 ℃, the temperature of a die lip to be 265 ℃, and the temperature of a three cooling roll to be 26 ℃/28 ℃/28 ℃ to prepare an antistatic micro-foaming PET sheet with the thickness of 0.2mm (the thickness ratio of a first polyester layer to a second polyester layer to a third polyester layer is 5. The results of the performance tests are shown in table 1.
Example 7
Weighing 100 parts by weight of PETG, placing the PETG into a dehumidifying dryer, drying the PETG for 4 hours at the dew point of-40 ℃ and the temperature of 60 ℃, adding 74.5 parts by weight of PETG into a double-screw extruder, and adding 25.5 parts by weight of PETG into a single-screw extruder; simultaneously adding 25 parts by weight of talcum powder and 0.5 part by weight of silver powder into a double-screw extruder; injecting 0.1 part by weight of supercritical n-pentane into a double-screw extruder, controlling the temperature of the single-screw extruder to be 260-265 ℃, the temperature of the double-screw extruder to be 260-265 ℃, the temperature of a three-layer melt distributor to be 260 ℃, the temperature of a die lip to be 255 ℃, the temperature of a three-cooling roller to be 26 ℃/28 ℃/28 ℃, and preparing the antistatic micro-foaming PETG sheet with the thickness of 0.2mm (the thickness ratio of a first polyester layer to a second polyester layer to a third polyester layer is 5. The results of the performance tests are shown in Table 1.
Example 8
Weighing 100 parts by weight of PLA, placing the PLA into a dehumidifying dryer, drying the PLA for 4 hours at the dew point of-40 ℃ at 80 ℃, then adding 74.5 parts by weight of PLA into a double-screw extruder, and adding 25.5 parts by weight of PLA into a single-screw extruder; simultaneously adding 25 parts by weight of talcum powder and 1 part by weight of sorbitol ester into a double-screw extruder; injecting 0.1 part by weight of supercritical n-pentane into a double-screw extruder, controlling the temperature of the single-screw extruder to be 190-200 ℃, the temperature of the double-screw extruder to be 190-200 ℃, the temperature of a three-layer melt distributor to be 190 ℃, the temperature of a die lip to be 185 ℃, the temperature of a three cooling roller to be 20 ℃/22 ℃/22 ℃, and preparing the antistatic micro-foaming PLA sheet with the thickness of 0.2mm (the thickness ratio of a first polyester layer to a second polyester layer to a third polyester layer is 5. The results of the performance tests are shown in table 1.
Example 9
Weighing 100 parts by weight of PC, putting the PC into a dehumidifying dryer, drying the PC for 4 hours at the dew point of-40 ℃ at 120 ℃, and then adding 83 parts by weight of PC into a double-screw extruder and 17 parts by weight of PC into a single-screw extruder; simultaneously adding 15 parts by weight of silicon dioxide and 2 parts by weight of octadecyl phosphate into a double-screw extruder; adding 0.05 weight part of supercritical N 2 Injecting the mixture into a double-screw extruder, controlling the temperature of the single-screw extruder to be 280-300 ℃ and the temperature of the double-screw extruder to be 280-300 ℃,the three-layer melt distributor temperature was 280 ℃, the die lip temperature was 275 ℃, the three chill roll temperature was 26 ℃/28 ℃/28 ℃, an antistatic microfoamed PC sheet was prepared that was 1.0mm thick (the ratio of the thickness of the first, second and third polyester layers was 5. The results of the performance tests are shown in table 1.
Example 10
Weighing 100 parts by weight of PC, putting the PC into a dehumidifying dryer, drying the PC for 4 hours at the dew point of-40 ℃ at 120 ℃, and then adding 83 parts by weight of PC into a double-screw extruder and 17 parts by weight of PC into a single-screw extruder; simultaneously adding 15 parts by weight of mica powder and 2 parts by weight of sorbitol ester into a double-screw extruder; adding 0.05 weight part of supercritical CO 2 And (2) injecting the mixture into a double-screw extruder, controlling the temperature of the single-screw extruder to be 280-300 ℃, the temperature of the double-screw extruder to be 280-300 ℃, the temperature of a three-layer melt distributor to be 280 ℃, the temperature of a die lip to be 275 ℃, and the temperature of a three cooling roller to be 26 ℃/28 ℃/28 ℃, so as to prepare the antistatic micro-foaming PC sheet with the thickness of 1.0mm (the thickness ratio of the first polyester layer to the second polyester layer to the third polyester layer is 5. The results of the performance tests are shown in Table 1.
Example 11
Weighing 100 parts by weight of PLA, placing the PLA into a dehumidifying dryer, drying the PLA for 4 hours at the dew point of-40 ℃ at 80 ℃, then adding 74.5 parts by weight of PLA into a double-screw extruder, and adding 25.5 parts by weight of PLA into a single-screw extruder; simultaneously adding 20 parts by weight of montmorillonite and 0.5 part by weight of silver powder into a double-screw extruder; injecting 0.1 part by weight of supercritical n-pentane into a double-screw extruder, controlling the temperature of the single-screw extruder to be 190-200 ℃, the temperature of the double-screw extruder to be 190-200 ℃, the temperature of a three-layer melt distributor to be 190 ℃, the temperature of a die lip to be 185 ℃, the temperature of a three cooling roller to be 20 ℃/22 ℃/22 ℃, and preparing the antistatic micro-foaming PLA sheet with the thickness of 0.2mm (the thickness ratio of a first polyester layer to a second polyester layer to a third polyester layer is 5. The results of the performance tests are shown in Table 1.
Example 12
Weighing 100 parts by weight of PLA, placing the PLA into a dehumidifying dryer, drying the PLA for 4 hours at the dew point of-40 ℃ at 80 ℃, then adding 74.5 parts by weight of PLA into a double-screw extruder, and adding 25.5 parts by weight of PLA into a single-screw extruder; simultaneously adding 5 parts by weight of montmorillonite and 2 parts by weight of sodium dodecyl benzene sulfonate into a double-screw extruder; injecting 0.1 part by weight of supercritical n-pentane into a double-screw extruder, controlling the temperature of the single-screw extruder to be 190-200 ℃, the temperature of the double-screw extruder to be 190-200 ℃, the temperature of a three-layer melt distributor to be 190 ℃, the temperature of a die lip to be 185 ℃, and the temperature of a three cooling roll to be 20 ℃/22 ℃/22 ℃, and preparing an antistatic micro-foaming PLA sheet with the thickness of 0.2mm (the thickness ratio of a first polyester layer, a second polyester layer and a third polyester layer is 5. The results of the performance tests are shown in table 1.
Example 13
Weighing 100 parts by weight of PET, putting the PET into a dehumidifying dryer, drying the PET at the dew point of-40 ℃ for 4 hours at 160 ℃, adding 74.5 parts by weight of PET into a double-screw extruder, and adding 25.5 parts by weight of PET into a single-screw extruder; simultaneously adding 5 parts by weight of montmorillonite and 2 parts by weight of sodium dodecyl benzene sulfonate into a double-screw extruder; injecting 0.1 part by weight of supercritical carbon dioxide into a double-screw extruder, controlling the temperature of the single-screw extruder to be 265-280 ℃, the temperature of the double-screw extruder to be 270-285 ℃, the temperature of a three-layer melt distributor to be 270 ℃, the temperature of a die lip to be 265 ℃, and the temperature of a three-cooling roll to be 26 ℃/28 ℃/28 ℃, and preparing the antistatic micro-foaming PET sheet with the thickness of 0.2mm (the thickness ratio of a first polyester layer to a second polyester layer to a third polyester layer is 5. The results of the performance tests are shown in Table 1.
Example 14
Weighing 100 parts by weight of PETG, putting the PETG into a dehumidifying dryer, drying the PETG for 4 hours at 60 ℃ at the dew point of-40 ℃, adding 74.5 parts by weight of PETG into a double-screw extruder, and adding 25.5 parts by weight of PETG into a single-screw extruder; simultaneously adding 5 parts by weight of montmorillonite and 2 parts by weight of sodium dodecyl benzene sulfonate into a double-screw extruder; injecting 0.1 part by weight of supercritical carbon dioxide into a double-screw extruder, controlling the temperature of the single-screw extruder to be 260-265 ℃, the temperature of the double-screw extruder to be 260-265 ℃, the temperature of a three-layer melt distributor to be 260 ℃, the temperature of a die lip to be 255 ℃, the temperature of a three-cooling roller to be 26 ℃/28 ℃/28 ℃, and preparing the antistatic micro-foaming PETG sheet with the thickness of 0.2mm (the thickness ratio of a first polyester layer to a second polyester layer to a third polyester layer is 5. The results of the performance tests are shown in Table 1.
Example 15
Weighing 100 parts by weight of PC, putting the PC into a dehumidifying dryer, drying the PC for 4 hours at the dew point of-40 ℃ at 120 ℃, adding 74.5 parts by weight of PC into a double-screw extruder, and adding 25.5 parts by weight of PC into a single-screw extruder; simultaneously adding 5 parts by weight of montmorillonite and 2 parts by weight of sodium dodecyl benzene sulfonate into a double-screw extruder; injecting 0.1 part by weight of supercritical nitrogen into a double-screw extruder, controlling the temperature of the single-screw extruder to be 280-300 ℃, the temperature of the double-screw extruder to be 280-300 ℃, the temperature of a three-layer melt distributor to be 280 ℃, the temperature of a die lip to be 275 ℃, the temperature of a three-cooling roll to be 26 ℃/28 ℃/28 ℃, and preparing the antistatic micro-foaming PC sheet with the thickness of 0.2mm (the thickness ratio of a first polyester layer to a second polyester layer to a third polyester layer is 5. The results of the performance tests are shown in Table 1.
Example 16
Weighing 100 parts by weight of PLA, placing the PLA into a dehumidifying dryer, drying the PLA for 4 hours at the dew point of-40 ℃ at 80 ℃, then adding 74.5 parts by weight of PLA into a double-screw extruder, and adding 25.5 parts by weight of PLA into a single-screw extruder; simultaneously adding 5 parts by weight of montmorillonite and 2 parts by weight of sodium dodecyl benzene sulfonate into the double-screw extruder; injecting 0.1 part by weight of supercritical difluoromethane HFC-32 into a double-screw extruder, controlling the temperature of the single-screw extruder to be 190-200 ℃, the temperature of the double-screw extruder to be 190-200 ℃, the temperature of a three-layer melt distributor to be 190 ℃, the temperature of a die lip to be 185 ℃, and the temperature of a three cooling roll to be 20 ℃/22 ℃/22 ℃, and preparing an antistatic micro-foaming PLA sheet with the thickness of 0.2mm (the thickness ratio of a first polyester layer to a second polyester layer to a third polyester layer is 5. The results of the performance tests are shown in table 1.
Comparative example 1
Weighing 100 parts by weight of PET 8828, putting the PET 8828 into a dehumidifying dryer, drying at the dew point of-40 ℃ for 4 hours at 160 ℃, adding 88 parts by weight of PET 8828 into a double-screw extruder, and adding 12 parts by weight of PET 8828 into a single-screw extruder; and controlling the temperature of a single-screw extruder to be 265-280 ℃, the temperature of a double-screw extruder to be 270-285 ℃, the temperature of a three-layer melt distributor to be 270 ℃, the temperature of a die lip to be 265 ℃ and the temperature of a three cooling roll to be 26 ℃/28 ℃/28 ℃, so as to prepare the antistatic micro-foaming PET sheet with the thickness of 0.7mm (the thickness ratio of a first polyester layer to a second polyester layer to a third polyester layer is 5. The results of the performance tests are shown in table 1.
Comparative example 2 (without supercritical fluid)
Weighing 100 parts by weight of PET 8828, putting the PET 8828 into a dehumidifying dryer, drying at the dew point of-40 ℃ for 4 hours at the temperature of 160 ℃, adding 85 parts by weight of PET 8828 into a double-screw extruder, and adding 12 parts by weight of PET 8828 into a single-screw extruder; simultaneously adding 10 parts by weight of mica powder and 5 parts by weight of carbon black into a double-screw extruder; and controlling the temperature of a single-screw extruder to be 265-280 ℃, the temperature of a double-screw extruder to be 270-285 ℃, the temperature of a three-layer melt distributor to be 270 ℃, the temperature of a die lip to be 265 ℃ and the temperature of a three cooling roll to be 26 ℃/28 ℃/28 ℃, so as to prepare the antistatic micro-foaming PET sheet with the thickness of 0.7mm (the thickness ratio of a first polyester layer to a second polyester layer to a third polyester layer is 5. The results of the performance tests are shown in table 1.
TABLE 1 Properties of antistatic micro-foamed polyester sheets obtained in examples 1 to 11 and comparative examples 1 to 2
Figure BDA0003167405460000101
Figure BDA0003167405460000111
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (12)

1. An antistatic micro-foamed polyester, comprising: thermoplastic polyester, inorganic nucleating agent, antistatic agent and supercritical fluid.
2. The antistatic micro-foamed polyester according to claim 1, wherein the mass ratio of the thermoplastic polyester, the inorganic nucleating agent, the antistatic agent and the supercritical fluid is (64 to 95): (5-25): (0.1-10): (0.01-0.1).
3. The antistatic microfoamed polyester according to claim 1 or 2, characterized in that the thermoplastic polyester comprises at least one of PET, PETG, PC and PLA.
4. The antistatic micro-foamed polyester according to claim 1 or 2, wherein the inorganic nucleating agent comprises at least one of talc, silica, montmorillonite, calcium carbonate and mica powder.
5. The antistatic microfoamed polyester according to claim 1 or 2, characterized in that the antistatic agent comprises at least one of sodium dodecylbenzenesulfonate, octadecyl phosphate, sorbitol ester, carbon black, carbon nanotubes, graphene and metal fillers.
6. The antistatic microfoamed polyester according to claim 1 or 2, characterized in that the supercritical fluid comprises at least one of carbon dioxide, nitrogen, alkanes and fluorides.
7. A process for preparing the antistatic micro-foamed polyester according to any one of claims 1 to 6, characterized in that it comprises: feeding the thermoplastic polyester, the inorganic nucleating agent, the antistatic agent and the supercritical fluid into a double-screw extruder for extrusion molding.
8. An antistatic micro-foamed polyester sheet, comprising:
a first polyester layer;
a second polyester layer comprising the antistatic micro-foamed polyester of any one of claims 1 to 6 or the antistatic micro-foamed polyester obtained by the method of claim 7, and the first polyester layer being formed on an upper surface of the second polyester layer;
a third polyester layer formed on a lower surface of the second polyester layer.
9. The antistatic micro-foamed polyester sheet according to claim 8, wherein the antistatic micro-foamed polyester sheet has a thickness of 0.15 to 1.5mm.
10. The antistatic micro-foamed polyester sheet according to claim 8 or 9, characterized in that the thickness ratio of the first, second and third polyester layers is (5 to 10): (80-90): (5-10).
11. A process for preparing the antistatic micro-foamed polyester sheet according to any one of claims 8 to 10, characterized in that it comprises:
feeding thermoplastic polyester, an inorganic nucleating agent, an antistatic agent and a supercritical fluid into a double-screw extruder, simultaneously feeding polyester into a single-screw extruder, and then co-extruding to obtain the antistatic micro-foamed polyester sheet.
12. A package or tray made from the antistatic micro-foamed polyester sheet according to any one of claims 8 to 10 or obtained by the method of claim 11.
CN202110808814.8A 2021-07-16 2021-07-16 Antistatic micro-foamed polyester and preparation method and application thereof Pending CN115612256A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101565550A (en) * 2009-03-31 2009-10-28 北京中拓机械有限责任公司 Nucleating agent master batches used for foaming of thermoplastic resin
CN107283710A (en) * 2017-07-12 2017-10-24 青岛中诚高分子科技有限公司 A kind of thermoplastic polymer expanded bead and preparation method thereof
CN107857978A (en) * 2017-11-25 2018-03-30 长春中科应化生态材料有限公司 Antistatic biodegradable foam material and preparation method thereof
CN113056372A (en) * 2018-12-05 2021-06-29 金孝植 Multilayer-structure polylactic resin foamed sheet prepared by co-extrusion foaming method, molded article, method for producing same, and apparatus for producing same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101565550A (en) * 2009-03-31 2009-10-28 北京中拓机械有限责任公司 Nucleating agent master batches used for foaming of thermoplastic resin
CN107283710A (en) * 2017-07-12 2017-10-24 青岛中诚高分子科技有限公司 A kind of thermoplastic polymer expanded bead and preparation method thereof
CN107857978A (en) * 2017-11-25 2018-03-30 长春中科应化生态材料有限公司 Antistatic biodegradable foam material and preparation method thereof
CN113056372A (en) * 2018-12-05 2021-06-29 金孝植 Multilayer-structure polylactic resin foamed sheet prepared by co-extrusion foaming method, molded article, method for producing same, and apparatus for producing same

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
F.汉森: "塑料挤出技术", 中国轻工业出版社, pages: 314 - 315 *
李丹等: "用超临界CO2制备抗静电聚酯薄膜", 化工冶金, vol. 20, no. 3, pages 305 - 308 *
肖军: "聚丙烯发泡塑料 性能突显研究开发大有可为", 湖南包装, no. 1, pages 23 - 29 *

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