CN111909467A - Plastic tray material and preparation method thereof - Google Patents
Plastic tray material and preparation method thereof Download PDFInfo
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- CN111909467A CN111909467A CN202010682076.2A CN202010682076A CN111909467A CN 111909467 A CN111909467 A CN 111909467A CN 202010682076 A CN202010682076 A CN 202010682076A CN 111909467 A CN111909467 A CN 111909467A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/06—Polystyrene
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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
- C08K2201/00—Specific properties of additives
- C08K2201/001—Conductive additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/04—Antistatic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Abstract
The application relates to a plastic tray material and a preparation method thereof, relating to the technical field of plastic products, wherein the plastic tray material comprises the following components in percentage by mass: 50-59.94% of conductive fiber modified PS resin, 25-29.9% of PS resin, 15-20% of carbon black and 0.06-0.10% of antioxidant; the preparation method of the plastic tray material specifically comprises the following steps: s1, crushing carbon black, grinding the carbon black into powder, and drying the carbon black powder after grinding; s2, premixing carbon black powder and an antioxidant; s3, stirring and mixing the conductive fiber modified PS resin, the impact-resistant PS resin and the premix; s4, feeding the mixed material in the S3 into a screw extruder for blending and extruding; and S5, cooling, granulating and screening the extruded material to obtain a plastic pallet material, and then packaging and warehousing the plastic pallet material. This application has the effect that improves plastics tray antistatic properties and is relatively weak.
Description
Technical Field
The application relates to the technical field of plastic products, in particular to a plastic tray material and a preparation method thereof.
Background
Electronic products such as semiconductor chips and electronic components are generally integrated with a plurality of fine circuit elements, and are generally packaged in plastic trays during storage or transportation. At present, plastic trays, including PE trays and ABS trays, are mainly used as packaging trays for electronic products in the industry. The packaging tray needs to have good mechanical property and high temperature resistance, namely, the tray does not deform at high temperature or under external force, and the packaging tray also needs to have good corrosion resistance if the tray is required to have higher cleanliness. Since electronic products such as semiconductor chips or electronic components are very sensitive to static electricity, the requirement for the antistatic performance of the plastic tray is high during the packaging process. The antistatic performance of a large number of plastic trays on the market is weak, so that static electricity collected on the plastic trays may break down electronic products to damage the electronic products.
Disclosure of Invention
In order to overcome the defect that the antistatic performance of a plastic tray is weak, the application provides a plastic tray material and a preparation method thereof.
In a first aspect, the present application provides a plastic pallet material, which adopts the following technical scheme:
a plastic tray material comprises the following components in percentage by mass: 50-59.94% of PS resin I, 25-29.9% of PS resin II, 15-20% of carbon black and 0.06-0.10% of antioxidant; the first PS resin is a conductive fiber modified PS resin.
By adopting the technical scheme, the PS resin has certain antistatic performance, stores a certain amount of static electricity through the static electricity collecting effect, eliminates the static electricity through the conductive effect of the PS resin and the carbon black, and is cooperated with each other, so that the problem that a large amount of static electricity stored on the plastic tray punctures electronic elements is avoided, and the defect of poor antistatic performance of the plastic tray is overcome;
the PS resin is modified by the conductive fibers to improve the conductivity of the PS resin, so that the electrostatic collection amount on the PS resin is reduced, the static elimination efficiency is accelerated, and the antistatic performance of the plastic tray is further improved.
Preferably, the plastic tray material comprises the following components in percentage by mass: 54.28 percent of PS resin I, 27.14 percent of PS resin II, 18.5 percent of carbon black and 0.08 percent of antioxidant.
Preferably, the preparation method of the conductive fiber modified PS resin comprises the following steps: 1) weighing 10 parts of PS resin and 3 parts of conductive fiber according to parts by weight; 2) soaking and softening the conductive fibers, and then performing wet slitting to prepare short conductive fibers with the length of 3 mm; 3) dispersing the short-cut conductive fibers into the molten PS resin, feeding the blend into a screw extruder, and stirring and pressing the blend by a screw rod to uniformly blend the two; 4) and extruding, cooling, granulating and screening the blend to obtain the conductive fiber modified PS resin.
By adopting the technical scheme, in the process of preparing the conductive fiber modified PS resin, the conductive fiber is softened and then subjected to short-cut treatment so as to improve the dispersion uniformity of the conductive fiber in the molten PS resin and avoid the conductive fiber from agglomerating in the blending process, thereby ensuring the antistatic property of the conductive fiber modified PS resin.
Preferably, the conductive fibers are formed by interweaving polyester yarns and polyphenylene sulfide yarns in a ratio of 1: 1.
By adopting the technical scheme, the polyester yarn mainly has good toughness, chemical stability and flame retardance, the polyphenylene sulfide mainly has good high temperature resistance, thermal stability and electrical conductivity, the conductive fiber prepared by interweaving and compounding the polyester yarn and the polyphenylene sulfide has not only good electrical conductivity but also certain high temperature resistance stability, the conductive fiber modified PS resin has the advantages of being beneficial to ensuring the electrical conductivity of the conductive fiber modified PS resin, and the defects of poor heat resistance and brittleness of the PS resin are overcome, so that the various physical and chemical properties of the plastic tray are improved.
Preferably, the second PS resin is an impact-resistant PS resin, and the preparation method of the impact-resistant PS resin is: 1) weighing 15 parts of PS resin, 2.5 parts of conductive mica powder, 2.5 parts of copper-nickel alloy powder and 0.05 part of barium stearate according to the parts by weight; 2) firstly, premixing conductive mica powder and copper-nickel alloy powder; 3) adding the uniformly mixed powder in the step 2) into molten PS resin, simultaneously adding barium stearate, and uniformly stirring to obtain a blend; 4) and extruding, cooling, granulating and screening the mixture to obtain the impact-resistant PS resin.
By adopting the technical scheme, the mica powder has good toughness, elasticity and adhesiveness, the copper-nickel alloy has good impact resistance and structural strength, and the mica powder and the copper-nickel alloy powder are added into the molten PS resin together, so that the bonding strength and the impact resistance of a blending system are improved;
the mica powder is conductive mica powder, and the flaky structure of the conductive mica powder is favorable for forming a conductive network in a resin system, so that the conductivity of the anti-impact PS resin is improved to a certain extent, and the copper-nickel alloy is a metal alloy material, and the metal has certain conductivity, so that the prepared anti-impact PS resin not only has good mechanical property, but also can be matched with the conductive fiber modified PS resin and carbon black to further improve the antistatic property of the plastic tray.
Preferably, the antioxidant consists of antioxidant 1010 and antioxidant 168.
By adopting the technical scheme, the antioxidant 1010 is small in volatility, good in extraction resistance, high in thermal stability, long in lasting effect, free of coloring, pollution and toxicity, has a good synergistic effect with the antioxidant 168, and is beneficial to improving the antioxidant effect of the plastic tray and prolonging the antioxidant time of the plastic tray when being used in a composite manner.
Preferably, the mass ratio of the antioxidant 1010 to the antioxidant 168 is 1: 1.
By adopting the technical scheme, when the mass ratio of the antioxidant 1010 to the antioxidant 168 is 1:1, the optimal synergistic effect is achieved, the oxidation resistance of the plastic tray is improved most remarkably, and the effective oxidation resistance time of the plastic tray is longest.
In a second aspect, the application provides a preparation method of a plastic tray material, which adopts the following technical scheme:
a preparation method of a plastic tray material specifically comprises the following steps:
s1, carbon black pretreatment: crushing the carbon black, grinding the carbon black into powder, and drying the carbon black powder after grinding;
s2, premixing: premixing carbon black powder and an antioxidant to prepare a premix;
s3, adding the conductive fiber modified PS resin, the impact-resistant PS resin and the premix into a stirring cylinder for mixing for 10min, wherein the initial stirring speed is 400rpm, and the stirring speed is gradually increased at a speed of 200r/min to prepare a mixed material;
s4, feeding the mixed material in the step S3 into a screw extruder for blending and extruding, wherein the rotating speed of a screw is 1600 +/-10 rpm, and preparing an extruded material;
and S5, cooling, granulating and screening the extruded material to obtain a plastic pallet material, and then packaging and warehousing the plastic pallet material.
By adopting the technical scheme, in order to facilitate transportation, storage and dust prevention, the purchased carbon black material is generally granular, crushing and grinding are carried out before the carbon black material is put into use, the powdery carbon black has better dispersion performance compared with the granular carbon black, and the more uniform the carbon black is dispersed in a system, the more favorable the carbon black is for the full exertion of the conductivity; when the tray material is prepared, the carbon black and the antioxidant are uniformly mixed, and then the premix is blended with the conductive fiber modified PS resin and the impact-resistant PS resin to reduce agglomeration, so that the blending uniformity of all components of a system is improved, and the antistatic property of the plastic tray is ensured;
when the conductive fiber modified PS resin, the impact-resistant PS resin and the premix are blended, a stirring method from low speed to high speed is adopted, so that the dispersion performance of the carbon black in the premix is improved, and the carbon black, the conductive fiber modified PS resin and the impact-resistant PS resin have good blending uniformity, so that the carbon black is ensured to fully exert the conductivity.
Preferably, the temperature of each zone of the screw extruder in S4 is set as follows: zone 1: 170 +/-10 ℃; zone 2: 170 +/-10 ℃; zone 3: 200 plus or minus 10 ℃; zone 4: 200 plus or minus 10 ℃; zone 5: 200 plus or minus 10 ℃; zone 6: 200 plus or minus 10 ℃; zone 7: 200 plus or minus 10 ℃; zone 8: 210 +/-10 ℃; zone 9: 220 +/-10 ℃; zone 10: 220 +/-10 ℃; head temperature: 220 +/-10 ℃.
By adopting the technical scheme, the temperature of each area of the screw extruder is controlled within a proper range so as to control the production efficiency and ensure the product quality.
In summary, the present application includes at least one of the following beneficial technical effects:
the PS resin stores a certain amount of static electricity through the static electricity collecting effect, then eliminates the static electricity through the self and the conductive effect of the carbon black, and the static electricity and the carbon black are cooperatively matched, so that the problem that a large amount of static electricity stored on the plastic tray breaks down electronic elements is avoided, and the defect that the antistatic performance of the plastic tray is poor is overcome;
2. the PS resin is modified by using the conductive fibers so as to improve the conductivity of the PS resin, thereby reducing the electrostatic collection amount on the PS resin, accelerating the static elimination efficiency and further improving the antistatic property of the plastic tray;
3. the conductive fiber prepared by interweaving and compounding the polyester yarn and the polyphenylene sulfide yarn has good conductivity and certain high-temperature resistance stability, is beneficial to ensuring the conductivity of the conductive fiber modified PS resin, and also has the advantages of improving the defects of poor heat resistance and brittleness of the PS resin, thereby improving various physical and chemical properties of the plastic tray;
4. the anti-impact PS resin prepared by modifying the conductive mica powder and the copper-nickel alloy powder not only has good mechanical property, but also can be matched with the conductive fiber modified PS resin and carbon black so as to further improve the antistatic property of the plastic tray.
Detailed Description
In the present application, the PS resin I is purchased from Enlishi benzene collar;
PS resin II was purchased from hong Kong petrochemical;
the antioxidant 1010 and the antioxidant 168 are purchased from wind-light chemical company Limited in Yingkou city;
carbon black is available from ORION (orkinon) and is type IBAKXPB 366.
The embodiment of the application discloses a plastic tray material and a preparation method thereof.
Example 1
The plastic tray material comprises the following components in percentage by mass: 54.28% of conductive fiber modified PS resin, 27.14% of common PS resin, 18.5% of carbon black, 10100.04% of antioxidant and 1680.04% of antioxidant;
the preparation method of the conductive fiber modified PS resin comprises the following steps:
1) weighing 10 parts of PS resin and 3 parts of conductive fiber according to the parts by weight, wherein the conductive fiber is formed by interweaving and compounding polyester yarns and polyphenylene sulfide yarns according to a ratio of 1: 1;
2) soaking and softening the conductive fibers, and then performing wet slitting to prepare short conductive fibers with the length of 3 mm;
3) dispersing the short-cut conductive fibers into the molten PS resin, feeding the blend into a screw extruder, and stirring and pressing the blend by a screw rod to uniformly blend the two;
4) extruding, cooling, granulating and screening the blend to obtain the conductive fiber modified PS resin;
the preparation method of the plastic tray material specifically comprises the following steps:
s1, carbon black pretreatment: crushing the carbon black, grinding the carbon black into powder, and drying the carbon black powder after grinding;
s2, premixing: premixing carbon black powder, an antioxidant 1010 and an antioxidant 168 to prepare a premix;
s3, adding the conductive fiber modified PS resin, the common PS resin and the premix into a stirring cylinder for mixing for 10min, wherein the initial stirring speed is 400rpm, and the stirring speed is gradually increased at a speed of 200r/min to prepare a mixed material;
s4, feeding the mixed material in the step S3 into a screw extruder for blending and extruding, wherein the rotating speed of a screw is 1600rpm, and the temperature of each area of the screw extruder is set as follows: zone 1: 170 ℃; zone 2: 170 ℃; zone 3: 200 ℃; zone 4: 200 ℃; zone 5: 200 ℃; zone 6: 200 ℃; zone 7: 200 ℃; zone 8: at 210 ℃; zone 9: 220 ℃; zone 10: 220 ℃; head temperature: preparing an extrusion material at 220 ℃;
and S5, cooling, granulating and screening the extruded material to obtain a plastic pallet material, and then packaging and warehousing the plastic pallet material.
Example 2
The plastic tray material comprises the following components in percentage by mass: 50% of conductive fiber modified PS resin, 29.9% of common PS resin, 20% of carbon black, 10100.05% of antioxidant and 1680.05% of antioxidant;
the preparation method of the conductive fiber modified PS resin is the same as in example 1;
the preparation method of the plastic tray material specifically comprises the following steps:
s1, carbon black pretreatment: crushing the carbon black, grinding the carbon black into powder, and drying the carbon black powder after grinding;
s2, premixing: premixing carbon black powder, an antioxidant 1010 and an antioxidant 168 to prepare a premix;
s3, adding the conductive fiber modified PS resin, the common PS resin and the premix into a stirring cylinder for mixing for 10min, wherein the initial stirring speed is 400rpm, and the stirring speed is gradually increased at a speed of 200r/min to prepare a mixed material;
s4, feeding the mixed material in the step S3 into a screw extruder for blending and extruding, wherein the rotating speed of a screw is 1590rpm, and the temperature of each area of the screw extruder is set as follows: zone 1: 160 ℃; zone 2: 160 ℃; zone 3: 190 ℃; zone 4: 190 ℃; zone 5: 190 ℃; zone 6: 190 ℃; zone 7: 190 ℃; zone 8: 200 ℃; zone 9: at 210 ℃; zone 10: at 210 ℃; head temperature: preparing an extrusion material at 210 ℃;
and S5, cooling, granulating and screening the extruded material to obtain a plastic pallet material, and then packaging and warehousing the plastic pallet material.
Example 3
The plastic tray material comprises the following components in percentage by mass: 59.94% of conductive fiber modified PS resin, 25% of common PS resin, 15% of carbon black, 10100.03% of antioxidant and 1680.03% of antioxidant;
the preparation method of the conductive fiber modified PS resin is the same as in example 1;
the preparation method of the plastic tray material specifically comprises the following steps:
s1, carbon black pretreatment: crushing the carbon black, grinding the carbon black into powder, and drying the carbon black powder after grinding;
s2, premixing: premixing carbon black powder, an antioxidant 1010 and an antioxidant 168 to prepare a premix;
s3, adding the conductive fiber modified PS resin, the common PS resin and the premix into a stirring cylinder for mixing for 10min, wherein the initial stirring speed is 400rpm, and the stirring speed is gradually increased at a speed of 200r/min to prepare a mixed material;
s4, feeding the mixed material in the step S3 into a screw extruder for blending and extruding, wherein the rotating speed of a screw is 1610rpm, and the temperature of each area of the screw extruder is set as follows: zone 1: 180 ℃; zone 2: 180 ℃; zone 3: at 210 ℃; zone 4: at 210 ℃; zone 5: at 210 ℃; zone 6: at 210 ℃; zone 7: at 210 ℃; zone 8: 220 ℃; zone 9: 230 ℃; zone 10: 230 ℃; head temperature: preparing an extrusion material at 230 ℃;
and S5, cooling, granulating and screening the extruded material to obtain a plastic pallet material, and then packaging and warehousing the plastic pallet material.
Example 4
The present example is different from example 1 in that the conductive fiber is woven from polyester yarn.
Example 5
This example differs from example 1 in that the conductive fibers are woven from polyphenylene sulfide filaments.
Example 6
This embodiment is different from embodiment 1 in that the ordinary PS resin is replaced with an impact-resistant PS resin;
the preparation method of the impact-resistant PS resin comprises the following steps: 1) weighing 15 parts of PS resin, 2.5 parts of conductive mica powder, 2.5 parts of copper-nickel alloy powder and 0.05 part of barium stearate according to the parts by weight; 2) firstly, premixing conductive mica powder and copper-nickel alloy powder; 3) adding the uniformly mixed powder in the step 2) into molten PS resin, simultaneously adding barium stearate, and uniformly stirring to obtain a blend; 4) and extruding, cooling, granulating and screening the mixture to obtain the impact-resistant PS resin.
Example 7
This embodiment is different from embodiment 1 in that the ordinary PS resin is replaced with an impact-resistant PS resin;
the preparation method of the impact-resistant PS resin comprises the following steps: 1) weighing 15 parts of PS resin, 2.5 parts of copper-nickel alloy powder and 0.05 part of barium stearate according to parts by weight; 2) adding copper-nickel alloy powder into molten PS resin, adding barium stearate at the same time, and uniformly stirring to obtain a blend; 4) and extruding, cooling, granulating and screening the mixture to obtain the impact-resistant PS resin.
Example 8
This embodiment is different from embodiment 1 in that the ordinary PS resin is replaced with an impact-resistant PS resin;
the preparation method of the impact-resistant PS resin comprises the following steps: 1) weighing 15 parts of PS resin, 2.5 parts of conductive mica powder and 0.05 part of barium stearate according to the parts by weight; 2) adding conductive mica powder into molten PS resin, adding barium stearate, and stirring to obtain a mixture; 4) and extruding, cooling, granulating and screening the mixture to obtain the impact-resistant PS resin.
Example 9
This example differs from example 1 in that no pretreatment of the carbon black is carried out in the preparation of the plastic pallet.
Comparative example 1
The plastic tray material comprises the following components in percentage by mass: 81.42% of common PS resin, 18.5% of carbon black, 10100.04% of antioxidant and 1680.04% of antioxidant;
the preparation method of the plastic tray material specifically comprises the following steps:
s1, premixing: premixing carbon black, an antioxidant 1010 and an antioxidant 168 to prepare a premix;
s3, adding the common PS resin and the premix into a stirring cylinder for mixing for 10min, wherein the initial stirring speed is 400rpm, and the stirring speed is gradually increased at a speed of 200r/min to prepare a mixed material;
s4, feeding the mixed material in the step S3 into a screw extruder for blending and extruding, wherein the rotating speed of a screw is 1600rpm, and the temperature of each area of the screw extruder is set as follows: zone 1: 170 ℃; zone 2: 170 ℃; zone 3: 200 ℃; zone 4: 200 ℃; zone 5: 200 ℃; zone 6: 200 ℃; zone 7: 200 ℃; zone 8: at 210 ℃; zone 9: 220 ℃; zone 10: 220 ℃; head temperature: preparing an extrusion material at 220 ℃;
and S5, cooling, granulating and screening the extruded material to obtain a plastic pallet material, and then packaging and warehousing the plastic pallet material.
Performance test
The plastic pallet prepared by the formulations of examples 1 to 9 and comparative example 1 and the preparation method were sampled, and the antistatic performance test was performed on the samples.
1) Test object
Preparing the sample into a plastic tray according to a conventional preparation method of the plastic tray, wherein the plastic tray is a test object of the detection test;
2) test method
Measuring the surface impedance value of a test object by using a surface impedance detector by adopting an ASTM standard D-257 parallel electrode sensing method;
3) test results
The antistatic performance of the plastic tray is characterized by using the surface impedance value, and the larger the surface impedance value of the plastic tray is, the smaller the antistatic performance of the plastic tray is. The antistatic performance corresponding to the surface resistance value of the plastic tray is shown in table 1 below, and the test results are recorded in table 2 below.
TABLE 1
TABLE 2
As can be seen from the test data in table 1:
1. in the embodiments 1 to 3, the first PS resin is modified by using the conductive fiber, and the finally obtained plastic tray has good conductivity, i.e., good antistatic property; the addition amounts of the components in the formulas of the embodiments 1 to 3 are different, and the detection data show that the proportion of the components in the embodiment 1 is the optimal proportion;
2. the conductive fibers used in examples 4 to 5 are monofilament fibers, and compared with example 1, the conductive fibers prepared from polyester monofilaments or polyphenylene sulfide monofilaments have a better effect of modifying the antistatic property of the first PS resin than the conductive fibers prepared by mixing two filaments;
3. embodiment 6 is the best embodiment of multiple groups of embodiments, and embodiment 6 is to modify the impact resistance of the second PS resin on the basis of modifying the first PS resin by using the conductive fiber, wherein a conductive component is added in the modification process of the second PS resin, and the conductive fiber modified PS resin and the impact resistant PS resin are matched with each other, so that the antistatic property of the manufactured plastic pallet is improved;
4. in examples 7 to 8, impact resistance modification is performed on the second PS resin, but components of the conductive mica powder and the copper-nickel alloy powder are respectively deleted, and it can be known from the detection data that the modification effect on the second PS resin in examples 7 to 8 is inferior to that of the second PS resin in example 6, so that it is concluded that the combination of the conductive mica powder and the copper-nickel alloy powder is more beneficial to improving the antistatic property of the modified second PS resin, and thus the antistatic property of the plastic tray is improved;
5. from the comparison of the test results of example 9 and example 1, it can be seen that: the pretreatment of the carbon black before the carbon black is put into use is beneficial to improving the conductivity of the carbon black, so that the antistatic property of the prepared plastic tray is improved;
6. as can be seen from comparison between comparative example 1 and examples 1-3, the first PS resin and the second PS resin are not modified, and the prepared plastic pallet has certain antistatic performance due to the addition of carbon black, but the antistatic effect is far less than that of the plastic pallet prepared by adopting the formula materials in multiple groups of examples.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. A plastic tray material comprises the following components in percentage by mass: 50-59.94% of PS resin I, 25-29.9% of PS resin II, 15-20% of carbon black and 0.06-0.10% of antioxidant; the first PS resin is a conductive fiber modified PS resin.
2. A plastic pallet material as claimed in claim 1, wherein: the plastic tray material comprises the following components in percentage by mass: 54.28 percent of PS resin I, 27.14 percent of PS resin II, 18.5 percent of carbon black and 0.08 percent of antioxidant.
3. A plastic pallet material as claimed in claim 1, wherein: the preparation method of the conductive fiber modified PS resin comprises the following steps: 1) weighing 10 parts of PS resin and 3 parts of conductive fiber according to parts by weight; 2) soaking and softening the conductive fibers, and then performing wet slitting to prepare short conductive fibers with the length of 3 mm; 3) dispersing the short-cut conductive fibers into the molten PS resin, feeding the blend into a screw extruder, and stirring and pressing the blend by a screw rod to uniformly blend the two; 4) and extruding, cooling, granulating and screening the blend to obtain the conductive fiber modified PS resin.
4. A plastic pallet material as claimed in claim 3, wherein: the conductive fiber is formed by interweaving polyester yarns and polyphenylene sulfide yarns according to a ratio of 1: 1.
5. A plastic pallet material as claimed in claim 1, wherein: the second PS resin is an impact-resistant PS resin, and the preparation method of the impact-resistant PS resin comprises the following steps: 1) weighing 15 parts of PS resin, 2.5 parts of conductive mica powder, 2.5 parts of copper-nickel alloy powder and 0.05 part of barium stearate according to the parts by weight; 2) firstly, premixing conductive mica powder and copper-nickel alloy powder; 3) adding the uniformly mixed powder in the step 2) into molten PS resin, simultaneously adding barium stearate, and uniformly stirring to obtain a blend; 4) and extruding, cooling, granulating and screening the mixture to obtain the impact-resistant PS resin.
6. A plastic pallet material as claimed in claim 1, wherein: the antioxidant consists of an antioxidant 1010 and an antioxidant 168.
7. A plastic pallet material as claimed in claim 1, wherein: the mass ratio of the antioxidant 1010 to the antioxidant 168 is 1: 1.
8. The preparation method of the plastic tray material as claimed in any one of claims 1 to 7, comprising the following specific steps:
s1, carbon black pretreatment: crushing the carbon black, grinding the carbon black into powder, and drying the carbon black powder after grinding;
s2, premixing: premixing carbon black powder and an antioxidant to prepare a premix;
s3, adding the conductive fiber modified PS resin, the impact-resistant PS resin and the premix into a stirring cylinder for mixing for 10min, wherein the initial stirring speed is 400rpm, and the stirring speed is gradually increased at a speed of 200r/min to prepare a mixed material;
s4, feeding the mixed material in the step S3 into a screw extruder for blending and extruding, wherein the rotating speed of a screw is 1600 +/-10 rpm, and preparing an extruded material;
and S5, cooling, granulating and screening the extruded material to obtain a plastic pallet material, and then packaging and warehousing the plastic pallet material.
9. The method of making a plastic pallet material of claim 8, wherein: the temperatures of the zones of the screw extruder in S4 were set to: zone 1: 170 +/-10 ℃; zone 2: 170 +/-10 ℃; zone 3: 200 plus or minus 10 ℃; zone 4: 200 plus or minus 10 ℃; zone 5: 200 plus or minus 10 ℃; zone 6: 200 plus or minus 10 ℃; zone 7: 200 plus or minus 10 ℃; zone 8: 210 +/-10 ℃; zone 9: 220 +/-10 ℃; zone 10: 220 +/-10 ℃; head temperature: 220 +/-10 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010682076.2A CN111909467A (en) | 2020-07-15 | 2020-07-15 | Plastic tray material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010682076.2A CN111909467A (en) | 2020-07-15 | 2020-07-15 | Plastic tray material and preparation method thereof |
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