CN113604023A - High-strength hard plastic scraper for printer and processing technology thereof - Google Patents

High-strength hard plastic scraper for printer and processing technology thereof Download PDF

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CN113604023A
CN113604023A CN202110972095.3A CN202110972095A CN113604023A CN 113604023 A CN113604023 A CN 113604023A CN 202110972095 A CN202110972095 A CN 202110972095A CN 113604023 A CN113604023 A CN 113604023A
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fiber
parts
graphene
pbo
scraper
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CN113604023B (en
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文雪亮
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Zhongshan Huixin Printing Consumables Co ltd
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Zhongshan Huixin Printing Consumables 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
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/06—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
    • C08J5/08—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials glass fibres
    • 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
    • C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/10—Reinforcing macromolecular compounds with loose or coherent fibrous material characterised by the additives used in the polymer mixture
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/0005—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium
    • G03G21/0011—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium using a blade; Details of cleaning blades, e.g. blade shape, layer forming
    • G03G21/0017—Details relating to the internal structure or chemical composition of the blades
    • 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
    • C08J2369/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
    • 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
    • C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2467/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • 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
    • C08J2479/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2461/00 - C08J2477/00
    • C08J2479/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
    • 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
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • 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
    • 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
    • C08K7/14—Glass
    • 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
    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances
    • C08K9/06—Ingredients treated with organic substances with silicon-containing compounds

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Abstract

The invention provides a high-strength hard plastic scraper for a printer and a processing technology thereof, wherein the scraper for the printer is made of modified fiber reinforced PC plastic, and the prepared scraper comprises the following components in parts by weight: 60-80 parts of PC resin, 10-30 parts of modified reinforced fiber, 10-15 parts of hard filler, 5-10 parts of potassium titanate whisker, 1-5 parts of compatilizer, 0.1-1 part of antioxidant, 3-8 parts of toughener, 0.1-1 part of ester exchange inhibitor, 1-5 parts of fiber-removing agent, 2-4 parts of impact modifier, 0.1-1 part of lubricant and 1000 parts of auxiliary additive 300, PBO fiber is used for grafting graphene, so that the smooth surface structure of PBO contains other groups, and the wettability of the PBO fiber and resin substances is greatly enhanced; the potassium titanate whisker, the modified reinforced fiber and the PC resin have synergistic effect, so that the mechanical property and the hardness of the composite material can be greatly improved, and compared with a metal scraper, the plastic scraper has the excellent characteristics of light weight, rust resistance, impact resistance, easiness in processing, low manufacturing cost and the like.

Description

High-strength hard plastic scraper for printer and processing technology thereof
Technical Field
The invention relates to the field of plastic scrapers, in particular to a high-strength hard plastic scraper for a printer and a processing technology thereof.
Background
The scraper for the printer is also called a cleaning scraper, and the printer scraper is divided into a blade and a support, in the printing or copying process of the printer or the copier, carbon powder forms an image on a toner cartridge and is then transferred onto copy paper, and a part of the carbon powder is left on the toner cartridge in the process. The quality of a blade is important, and directly determines the copying quality and the service life of the toner cartridge.
Nowadays, cleaning scrapers on the market are divided into two types, namely plastic scrapers and metal scrapers, and compared with metal scrapers, the plastic scrapers have the excellent characteristics of light weight, rust resistance, impact resistance, easiness in processing, low manufacturing cost and the like, but the plastic scrapers have poorer mechanical properties, hardness and wear resistance than the metal scrapers.
In view of this, there is a need for a high strength rigid plastic doctor blade for printers.
Disclosure of Invention
The invention aims to provide a high-strength hard plastic scraper and a processing technology thereof, and aims to solve the problems in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a high strength rigid plastic scraper for printer which characterized in that, scraper for printer adopts modified fiber reinforced PC plastics, and the preparation scraper needs following component according to part by weight: 60-80 parts of PC resin, 10-30 parts of modified reinforced fiber, 10-15 parts of hard filler, 5-10 parts of potassium titanate whisker, 1-5 parts of compatilizer, 0.1-1 part of antioxidant, 3-8 parts of toughener, 0.1-1 part of ester exchange inhibitor, 1-5 parts of fiber removing agent, 2-4 parts of impact modifier, 0.1-1 part of lubricant and 1000 parts of auxiliary additive.
Preferably, the modified reinforcing fiber comprises the following components in percentage: 60% -80% of glass fiber, 10% -20% of PBO fiber and 10% -20% of graphene.
Preferably, the auxiliary agent comprises a coupling agent, potassium chlorate, concentrated sulfuric acid, hydrogen peroxide, methanesulfonic acid, polyphosphoric acid and a phosphoric acid solution, the coupling agent is selected from any one or a combination of more than two of 3-aminopropyltriethoxysilane, gamma-aminoethylaminopropyltrimethoxysilane and gamma-aminopropyltriethoxysilane, and the selected amino-containing silane coupling agent can modify the glass fiber to contain amino so as to facilitate the subsequent reaction.
Preferably, the glass fiber is soda-lime-silica glass fiber, and the length of the glass fiber is 0.2-0.6 mm.
The potassium titanate whisker is potassium hexatitanate whisker with the length of 1-100 mu m, has small geometric size, can be filled in macromolecular pores such as glass fiber and PBO fiber in the process of melt blending, and improves the creep resistance, heat resistance and dimensional stability of the composite material.
Preferably, the compatilizer comprises any one or a combination of more than two of ultrahigh molecular weight polyethylene-maleic anhydride, polystyrene-maleic anhydride and ethylene-propylene-glyceryl methacrylate.
The hard filler is selected from one or the combination of more than two of ZrSiO4, Al2O3 and wollastonite, and the proper addition of the hard filler can reduce the using amount of resin and fiber, save cost, enhance the hardness of the product and have little loss on the mechanical property of the composite material.
The antioxidant includes any one or a combination of two or more of 1,3, 5-tris (3, 5-di-tert-butyl, 4-hydroxybenzyl) s-triazine, 2,4,6- (1H,3H,5H) trione, pentaerythritol distearyl diphosphite, tris (2, 4-di-tert-butylphenyl) phosphite, n-octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, tris (2, 4-di-tert-butyl) phosphite, and octadecyl hindered phenol (3, 5-di-butyl-4-hydroxy-phenyl propionate).
The toughening agent is any one or the combination of more than two of nano calcium carbonate, nano barium sulfate and nano montmorillonite.
The ester exchange inhibitor is anhydrous sodium dihydrogen phosphate which can inhibit the ester exchange reaction of PC material and can also assist the fiber removing agent.
The impact modifier is selected from one or more of ACR (acrylate polymer), EVA (ethylene-vinyl acetate copolymer), POE (ethylene-octene copolymer elastomer), ABS (acrylonitrile-butadiene-styrene copolymer) and EPDM (ethylene propylene diene monomer rubber).
The floating fiber removing agent is any one or the combination of more than two of polybutylene terephthalate and polyethylene terephthalate, and can enhance the solvent resistance of the PC material and remove floating fibers on the surface of the product at the same time, so that the surface of the product is smooth.
The lubricant is selected from one or the combination of more than two of ethylene bis-oleamide, N-ethylene bis-stearamide, stearic acid monoglyceride, pentaerythritol stearate and fatty acid salt.
A processing technology of a high-strength hard plastic scraper for a printer is characterized by comprising the following steps:
s1: accurately weighing PC resin, hard filler, compatilizer, antioxidant, toughening agent, ester exchange inhibitor, floating fiber removing agent, impact modifier and lubricant according to a formula, and then adding the materials into a high-speed mixer for mixing;
s2: accurately weighing potassium hexatitanate whiskers, modifying by using a coupling agent to prepare modified reinforced fibers, and adding the modified reinforced fibers and the potassium titanate whiskers modified by the coupling agent into a high-speed mixer;
s3: and carrying out melt blending on the mixture, cooling, granulating and drying after extrusion, and carrying out injection molding on the obtained granules to obtain the product.
Preferably, the modified reinforcing fiber is prepared by the following steps:
s1: weighing graphene, adding the graphene into a mixed system of potassium chlorate, concentrated sulfuric acid and hydrogen peroxide, stirring for 10-30min at 0 ℃, and reacting to obtain carboxylated graphene, wherein the oxygen content of the prepared carboxylated graphene is 30-50%;
s2: weighing PBO fibers, adding carboxylated graphene into a polyphosphoric acid solution, ultrasonically vibrating for 10-20min, adding PBO fibers into a methanesulfonic acid solution, ultrasonically vibrating for 1-4h, mixing the two ultrasonically vibrated solutions, stirring at 160 ℃ for 20-40min, and reacting to generate carboxylated graphene grafted PBO fibers;
s3: weighing soda-lime-silica glass fiber, carrying out wet ball milling on the soda-lime-silica glass fiber, drying the obtained soda-lime-silica glass fiber powder at the temperature of 100 ℃ and 130 ℃ for 4-6h, adding the glass fiber powder into deionized water after drying, and then adding a coupling agent for carrying out ultrasound treatment for 10-20min to obtain an aminated glass powder solution;
s4: carrying out wet ball milling on PBO fiber grafted by carboxylated graphene, drying, carrying out ultrasonic dispersion, preparing PBO fiber dispersion liquid grafted by the carboxylated graphene, mixing the PBO fiber dispersion liquid grafted by the carboxylated graphene and a glass powder solution, adding the mixture into a mixed system of polyphosphoric acid and phosphoric acid, stirring for 20-40min at the temperature of 130-150 ℃, standing for 20min, filtering and drying at the temperature of 120 ℃ under vacuum, wherein the PBO grafted by the graphene is easy to carry out condensation reaction with the glass fiber containing amino under the heating condition of polyphosphoric acid due to the carboxyl group contained on the surface of the PBO grafted by the graphene so as to obtain the modified reinforced fiber.
The mixing time of the high-speed mixer is 3-8 min.
The extrusion temperature is 230-290 ℃, and the rotation speed is 300-600 r/min.
The injection temperature is 240-320 ℃, and the injection pressure is 100-150 MPa.
The mass ratio of the potassium chlorate to the graphene is 6-10, and the mass of the hydrogen peroxide is 5-10% of that of the graphene.
The mass ratio of the polyphosphoric acid to the graphene is 60-80, and the mass ratio of the methanesulfonic acid to the PBO fiber is 40-80.
The invention has the beneficial effects that:
1. according to the invention, the modified reinforcing fiber, the potassium titanate whisker and the hard filler are added into the PC resin, so that the plastic scraper with high toughness, high strength, high heat resistance, high friction resistance and high hardness is obtained.
2. The addition of the floating fiber removing agent greatly improves the solvent resistance of the PC material, removes floating fibers on the surface of a product, improves the smoothness of the material, and adds the hard filler, thereby reducing the cost and increasing the hardness of the product.
3. Compared with a metal scraper, the plastic scraper has the excellent characteristics of light weight, rust resistance, impact resistance, easiness in processing, low manufacturing cost and the like.
4. The PBO fiber is used for grafting the graphene, so that other groups are contained on the smooth surface structure of the PBO, the wettability of the PBO with resin substances is greatly enhanced, and the tensile strength of the PBO fiber is enhanced to a certain extent by the graphene.
5. The oxygen content of the carboxylated graphene accounts for 30-50%, the surface of the PBO fiber grafted by the graphene contains a plurality of carboxyl groups, and the modified reinforced fiber is added into a mixed system of polyphosphoric acid and phosphoric acid under a heating condition and can easily react with the glass fiber containing amino to obtain the modified reinforced fiber.
6. The potassium hexatitanate whisker has small geometric size, can be filled in macromolecular pores such as glass fiber and PBO fiber in the process of melt blending, and improves the creep resistance, heat resistance and dimensional stability of the composite material.
Detailed description of the preferred embodiments
The technical solutions of the present invention are described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For ease of understanding, the following examples are given by way of illustration only:
example 1:
the embodiment provides a high strength rigid plastic scraper for printer, modified glass fiber reinforced PC plastic is adopted to scraper for printer, preparation the scraper needs following component according to part by weight: 60 parts of PC resin, 10 parts of modified reinforced fiber, 410 parts of ZrSiO, 1 part of polystyrene-maleic anhydride, 0.1 part of pentaerythritol distearyl diphosphite, 3 parts of nano calcium carbonate, 0.1 part of anhydrous sodium dihydrogen phosphate, 1 part of polybutylene terephthalate, 2 parts of EPDM, 0.1 part of ethylene bis-oleamide, 5 parts of potassium hexatitanate whisker and 300 parts of auxiliary additive.
The modified reinforced fiber comprises the following components in percentage:
60% of glass fiber, 20% of PBO fiber and 20% of graphene.
The processing technology of the high-strength rigid plastic scraper for the printer comprises the following steps:
s1: accurately weighing PC resin, hard filler, compatilizer, antioxidant, toughening agent, ester exchange inhibitor, floating fiber removing agent, impact modifier and lubricant according to a formula, and then adding the materials into a high-speed mixer for mixing;
s2, weighing graphene, adding the graphene into a mixed system of potassium chlorate, concentrated sulfuric acid and hydrogen peroxide, stirring for 10min at 0 ℃, and reacting to obtain carboxylated graphene;
s3: weighing PBO fibers, adding carboxylated graphene into a polyphosphoric acid solution, ultrasonically vibrating for 10min, adding PBO fibers into a methanesulfonic acid solution, ultrasonically vibrating for 1h, mixing the two ultrasonically vibrated solutions, stirring for 20min at 100 ℃, and reacting to generate carboxylated graphene grafted PBO fibers;
s4: weighing soda-lime-silica glass fibers, carrying out wet ball milling on the soda-lime-silica glass fibers, drying the obtained soda-lime-silica glass fiber powder at 100 ℃ for 4 hours, adding the glass fiber powder into deionized water after drying, and then adding a coupling agent for carrying out ultrasound treatment for 10min to obtain an aminated glass powder solution;
s5: carrying out wet ball milling on the PBO fiber grafted by the carboxylated graphene, drying, carrying out ultrasonic dispersion to prepare a PBO fiber dispersion liquid grafted by the carboxylated graphene, mixing the PBO fiber dispersion liquid grafted by the carboxylated graphene and a glass powder solution, adding the mixture into a mixed system of polyphosphoric acid and phosphoric acid, stirring for 20min at 130 ℃, standing for 20min, filtering, and drying at 100 ℃ under vacuum to obtain modified reinforced fiber;
s6: weighing potassium hexatitanate whiskers, and carrying out surface treatment on the potassium hexatitanate whiskers by using 3-aminopropyltriethoxysilane to obtain surface-treated potassium hexatitanate whiskers;
s7: adding the modified reinforced fiber and the potassium hexatitanate whisker with the treated surface into a high-speed mixer, mixing for 5min, conveying to an extruder for melt blending, cooling, granulating and drying after extrusion, and adding the obtained granules into an injection molding machine for injection molding to obtain the product.
The extrusion temperature of the double-screw extruder is 260 ℃, and the screw rotating speed of the double-screw extruder is 300 r/min; the working temperature of the injection molding machine is 260 ℃, and the injection molding pressure is 115 Mpa; the mass ratio of the potassium chlorate to the graphene is 6, and the mass of the hydrogen peroxide is 5% of that of the graphene.
The mass ratio of polyphosphoric acid to graphene is 60, and the mass ratio of methanesulfonic acid to PBO fiber is 40.
Example 2:
the embodiment provides a high strength rigid plastic scraper for printer, modified glass fiber reinforced PC plastic is adopted to scraper for printer, preparation the scraper needs following component according to part by weight: 70 parts of PC resin, 20 parts of modified reinforced fiber, 415 parts of ZrSiO, 3 parts of polystyrene-maleic anhydride, 0.4 part of pentaerythritol distearyl diphosphite, 5 parts of nano calcium carbonate, 0.4 part of anhydrous sodium dihydrogen phosphate, 4 parts of polybutylene terephthalate, 3 parts of EPDM, 0.6 part of ethylene bis-oleamide, 8 parts of potassium hexatitanate whisker and 500 parts of auxiliary additive.
The modified reinforced fiber comprises the following components in percentage:
70% of glass fiber, 15% of PBO fiber and 15% of graphene oxide.
The processing technology of the high-strength rigid plastic scraper for the printer comprises the following steps:
s1: accurately weighing PC resin, hard filler, compatilizer, antioxidant, toughening agent, ester exchange inhibitor, floating fiber removing agent, impact modifier and lubricant according to a formula, and then adding the materials into a high-speed mixer for mixing;
s2, weighing graphene, adding the graphene into a mixed system of potassium chlorate, concentrated sulfuric acid and hydrogen peroxide, stirring for 20min at 0 ℃, and reacting to obtain carboxylated graphene;
s3: weighing PBO fibers, adding carboxylated graphene into a polyphosphoric acid solution, ultrasonically vibrating for 20min, adding PBO fibers into a methanesulfonic acid solution, ultrasonically vibrating for 2h, mixing the two ultrasonically vibrated solutions, stirring for 30min at 130 ℃, and reacting to generate carboxylated graphene grafted PBO fibers;
s4: weighing soda-lime-silica glass fibers, carrying out wet ball milling on the soda-lime-silica glass fibers, drying the obtained soda-lime-silica glass fiber powder at 100 ℃ for 4 hours, adding the glass fiber powder into deionized water after drying, and then adding a coupling agent for carrying out ultrasound treatment for 10min to obtain an aminated glass powder solution;
s5: carrying out wet ball milling on the PBO fiber grafted by the carboxylated graphene, drying, carrying out ultrasonic dispersion to prepare a PBO fiber dispersion liquid grafted by the carboxylated graphene, mixing the PBO fiber dispersion liquid grafted by the carboxylated graphene and a glass powder solution, adding the mixture into a mixed system of polyphosphoric acid and phosphoric acid, stirring for 20min at 140 ℃, standing for 20min, filtering, and drying at 100 ℃ under vacuum to obtain modified reinforced fiber;
s6: weighing potassium hexatitanate whiskers, and performing surface treatment on the potassium hexatitanate whiskers by using 3-aminopropyltriethoxysilane at 100 ℃ to obtain surface-treated potassium hexatitanate whiskers;
s7: adding the modified reinforced fiber and the potassium hexatitanate whisker with the treated surface into a high-speed mixer, mixing for 5min, conveying to an extruder for melt blending, cooling, granulating and drying after extrusion, and adding the obtained granules into an injection molding machine for injection molding to obtain the product.
The extrusion temperature of the double-screw extruder is 260 ℃, and the screw rotating speed of the double-screw extruder is 300 r/min; the working temperature of the injection molding machine is 260 ℃, and the injection molding pressure is 115 Mpa; the mass ratio of potassium chlorate to graphene is 8, and the mass of hydrogen peroxide is 10% of that of graphene; the mass ratio of polyphosphoric acid to graphene is 70, and the mass ratio of methanesulfonic acid to PBO fiber is 50.
Example 3:
the embodiment provides a high strength rigid plastic scraper for printer, modified glass fiber reinforced PC plastic is adopted to scraper for printer, preparation the scraper needs following component according to part by weight: 80 parts of PC resin, 30 parts of modified reinforced fiber, 415 parts of ZrSiO, 5 parts of polystyrene-maleic anhydride, 1 part of pentaerythritol distearyl diphosphite, 8 parts of nano calcium carbonate, 1 part of anhydrous sodium dihydrogen phosphate, 5 parts of polybutylene terephthalate, 4 parts of EPDM, 1 part of ethylene bis-oleamide, 10 parts of potassium hexatitanate whisker and 1000 parts of auxiliary additive.
The modified reinforced fiber comprises the following components in percentage:
70% of glass fiber, 15% of PBO fiber and 15% of graphene oxide.
The processing technology of the high-strength rigid plastic scraper for the printer comprises the following steps:
s1: accurately weighing PC resin, hard filler, compatilizer, antioxidant, toughening agent, ester exchange inhibitor, floating fiber removing agent, impact modifier and lubricant according to a formula, and then adding the materials into a high-speed mixer for mixing;
s2, weighing graphene, adding the graphene into a mixed system of potassium chlorate, concentrated sulfuric acid and hydrogen peroxide, stirring for 20min at 0 ℃, and reacting to obtain carboxylated graphene;
s3: adding carboxylated graphene into a polyphosphoric acid solution, carrying out ultrasonic oscillation for 10min, adding PBO fibers into a methanesulfonic acid solution, carrying out ultrasonic oscillation for 2h, mixing the two solutions after ultrasonic oscillation, stirring at 130 ℃ for 20-40min, and reacting to generate carboxylated graphene grafted PBO fibers;
s4: weighing soda-lime-silica glass fibers, carrying out wet ball milling on the soda-lime-silica glass fibers, drying the obtained soda-lime-silica glass fiber powder at 100 ℃ for 4 hours, adding the glass fiber powder into deionized water after drying, and then adding a coupling agent for carrying out ultrasound treatment for 10min to obtain an aminated glass powder solution;
s5: carrying out wet ball milling on the PBO fiber grafted by the carboxylated graphene, drying, carrying out ultrasonic dispersion to prepare a PBO fiber dispersion liquid grafted by the carboxylated graphene, mixing the PBO fiber dispersion liquid grafted by the carboxylated graphene and a glass powder solution, adding the mixture into a mixed system of polyphosphoric acid and phosphoric acid, stirring for 30min at 130 ℃, standing for 20min, filtering, and drying at 100 ℃ under vacuum to obtain modified reinforced fiber;
s6: weighing potassium hexatitanate whiskers, and performing surface treatment on the potassium hexatitanate whiskers by using 3-aminopropyltriethoxysilane at 100 ℃ to obtain surface-treated potassium hexatitanate whiskers;
s7: adding the modified reinforced fiber and the potassium hexatitanate whisker with the treated surface into a high-speed mixer, mixing for 5min, conveying to an extruder for melt blending, cooling, granulating and drying after extrusion, and adding the obtained granules into an injection molding machine for injection molding to obtain the product.
The extrusion temperature of the double-screw extruder is 260 ℃, and the screw rotating speed of the double-screw extruder is 300 r/min; the working temperature of the injection molding machine is 260 ℃, and the injection molding pressure is 115 Mpa; the mass ratio of potassium chlorate to graphene is 8, and the mass of hydrogen peroxide is 10% of that of graphene; the mass ratio of polyphosphoric acid to graphene is 70, and the mass ratio of methanesulfonic acid to PBO fiber is 70.
Example 4
The embodiment provides a high strength rigid plastic scraper for printer, modified glass fiber reinforced PC plastic is adopted to scraper for printer, preparation the scraper needs following component according to part by weight: 70 parts of PC resin, 20 parts of modified reinforced fiber, 415 parts of ZrSiO, 3 parts of polystyrene-maleic anhydride, 0.5 part of pentaerythritol distearyl diphosphite, 5 parts of nano calcium carbonate, 0.4 part of anhydrous sodium dihydrogen phosphate, 4 parts of polybutylene terephthalate, 3 parts of EPDM, 0.6 part of ethylene bis-oleamide, 8 parts of potassium hexatitanate whisker and 500 parts of auxiliary additive.
The modified reinforced fiber comprises the following components in percentage:
80% of glass fiber, 10% of PBO fiber and 10% of graphene oxide.
The processing technology of the high-strength rigid plastic scraper for the printer comprises the following steps:
s1: accurately weighing PC resin, hard filler, compatilizer, antioxidant, toughening agent, ester exchange inhibitor, floating fiber removing agent, impact modifier and lubricant according to a formula, and then adding the materials into a high-speed mixer for mixing;
s2, weighing graphene, adding the graphene into a mixed system of potassium chlorate, concentrated sulfuric acid and hydrogen peroxide, stirring for 10min at 0 ℃, and reacting to obtain carboxylated graphene;
s3: adding carboxylated graphene into a polyphosphoric acid solution, carrying out ultrasonic oscillation for 20min, adding PBO fibers into a methanesulfonic acid solution, carrying out ultrasonic oscillation for 4h, mixing the two solutions after ultrasonic oscillation, stirring for 30min at 160 ℃, and reacting to generate carboxylated graphene grafted PBO fibers;
s4: weighing soda-lime-silica glass fiber, carrying out wet ball milling on the soda-lime-silica glass fiber, drying the obtained soda-lime-silica glass fiber powder at 130 ℃ for 6 hours, adding the glass fiber powder into deionized water after drying, and then adding a coupling agent for ultrasonic treatment for 20min to obtain an aminated glass powder solution;
s5: carrying out wet ball milling on the PBO fiber grafted by the carboxylated graphene, drying, carrying out ultrasonic dispersion to prepare a PBO fiber dispersion liquid grafted by the carboxylated graphene, mixing the PBO fiber dispersion liquid grafted by the carboxylated graphene and a glass powder solution, adding the mixture into a mixed system of polyphosphoric acid and phosphoric acid, stirring for 40min at 150 ℃, standing for 20min, filtering, and drying at 120 ℃ under vacuum to obtain modified reinforced fiber;
s6: weighing potassium hexatitanate whiskers, and performing surface treatment on the potassium hexatitanate whiskers by using 3-aminopropyltriethoxysilane at 100 ℃ to obtain surface-treated potassium hexatitanate whiskers;
s7: adding the modified reinforced fiber and the potassium hexatitanate whisker with the treated surface into a high-speed mixer, mixing for 5min, conveying to an extruder for melt blending, cooling, granulating and drying after extrusion, and adding the obtained granules into an injection molding machine for injection molding to obtain the product.
The extrusion temperature of the double-screw extruder is 260 ℃, and the screw rotating speed of the double-screw extruder is 300 r/min; the working temperature of the injection molding machine is 260 ℃, and the injection molding pressure is 115 Mpa; the mass ratio of potassium chlorate to graphene is 10, and the mass of hydrogen peroxide is 10% of that of graphene; the mass ratio of the polyphosphoric acid to the graphene is 80, and the mass ratio of the methanesulfonic acid to the PBO fibers is 80.
Comparative example 1
Compared with example 2, the comparative example is different in that the modified reinforcing fiber is a common glass fiber.
Comparative example 2
Compared with example 2, the difference of the comparative example is that the modified reinforcing fiber adopts a graphene/glass fiber composite material.
Comparative example 3
The comparative example differs from example 2 in that no fiber-raising agent was used.
Comparative example 4
The comparative example differs from example 2 in that no hard filler is used.
Comparative example 5
The difference from example 2 is that no potassium titanate whiskers were added.
The high-strength hard plastic blade for printers obtained in examples 1 to 4 and comparative examples 1 to 5 were subjected to performance tests including tensile strength, flexural strength, elongation at break, notched impact strength, coefficient of friction, rockwell hardness, and surface fiber count.
Figure BDA0003226122720000131
Figure BDA0003226122720000141
Figure BDA0003226122720000151
Figure BDA0003226122720000161
Note 1: the plastic spatula was evaluated for surface fuzz by visual and hand touch feel.
According to the detection results, the tensile strength, the bending strength, the elongation at break, the notch impact strength and the hardness of the product are obviously improved under the synergistic effect of the modified reinforced fibers, the potassium hexatitanate whiskers and the PC resin, namely the plastic scraper has high strength and high hardness.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the present specification and directly/indirectly applied to other related technical fields within the spirit of the present invention are included in the scope of the present invention.

Claims (8)

1. The utility model provides a high strength rigid plastic scraper for printer which characterized in that: the scraper for the printer is made of modified fiber reinforced PC plastic, and is prepared from the following components in parts by weight: 60-80 parts of PC resin, 10-30 parts of modified reinforced fiber, 10-15 parts of hard filler, 5-10 parts of potassium titanate whisker, 1-5 parts of compatilizer, 0.1-1 part of antioxidant, 3-8 parts of toughener, 0.1-1 part of ester exchange inhibitor, 1-5 parts of fiber removing agent, 2-4 parts of impact modifier, 0.1-1 part of lubricant and 1000 parts of auxiliary additive.
2. The high-strength rigid plastic scraper blade for the printer as claimed in claim 1, wherein the modified reinforcing fiber comprises the following components in percentage: 60% -80% of glass fiber, 10% -20% of PBO fiber and 10% -20% of graphene.
3. A high strength rigid plastic doctor blade for printers as claimed in claim 2, wherein: the auxiliary agent comprises a coupling agent, potassium chlorate, concentrated sulfuric acid, hydrogen peroxide, methanesulfonic acid solution, polyphosphoric acid and phosphoric acid solution, wherein the coupling agent is any one or a combination of more than two of 3-aminopropyl triethoxysilane, gamma-aminoethyl aminopropyl trimethoxysilane and gamma-aminopropyl triethoxysilane.
4. A high strength rigid plastic doctor blade for printers as claimed in claim 3, wherein: the glass fiber is soda-lime-silica glass fiber, and the length of the glass fiber is 0.2-0.6 mm; the potassium titanate whisker is potassium hexatitanate whisker with the length of 1-100 mu m.
5. A high strength rigid plastic doctor blade for printers as claimed in claim 1, wherein: the compatilizer comprises any one or the combination of more than two of ultrahigh molecular weight polyethylene-maleic anhydride, polystyrene-maleic anhydride and ethylene-propylene-methacrylic acid glyceride;
the hard filler is selected from ZrSiO4、Al2O3Any one or a combination of more than two of wollastonite;
the antioxidant comprises any one or the combination of more than two of 1,3, 5-tri (3, 5-di-tert-butyl, 4-hydroxybenzyl) s-triazine, 2,4,6- (1H,3H,5H) trione, pentaerythritol distearyl diphosphite, tri (2, 4-di-tert-butylphenyl) phosphite, n-octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, tri (2, 4-di-tert-butyl) phosphite and octadecyl hindered phenol (3, 5-di-butyl-4-hydroxy-phenyl propionate);
the toughening agent is any one or the combination of more than two of nano calcium carbonate, nano barium sulfate and nano montmorillonite;
the ester exchange inhibitor is anhydrous sodium dihydrogen phosphate;
the impact modifier is selected from any one or the combination of more than two of ACR, EVA, POE, ABS and EPDM;
the fiber removing agent is selected from one or the combination of more than two of polybutylene terephthalate and polyethylene terephthalate;
the lubricant is selected from one or the combination of more than two of ethylene bis-oleamide, N-ethylene bis-stearamide, glyceryl monostearate, pentaerythritol stearate and fatty acid salt.
6. A processing technology of a high-strength hard plastic scraper for a printer is characterized by comprising the following steps:
s1: accurately weighing PC resin, hard filler, compatilizer, antioxidant, toughening agent, ester exchange inhibitor, floating fiber removing agent, impact modifier and lubricant according to the weight ratio of the formula, and then adding the mixture into a high-speed mixer for mixing;
s2: accurately weighing potassium hexatitanate whiskers, modifying by using a coupling agent to prepare modified reinforced fibers, and adding the modified reinforced fibers and the potassium hexatitanate whiskers modified by the coupling agent into a high-speed mixer;
s3: and carrying out melt blending on the mixture, cooling, granulating and drying after extrusion, and carrying out injection molding on the obtained granules to obtain the product.
7. The processing technology of the high-strength hard plastic scraper blade for the printer according to claim 6, wherein the modified reinforcing fiber is prepared by the following steps:
s1: weighing graphene, adding the graphene into a mixed system of potassium chlorate, concentrated sulfuric acid and hydrogen peroxide, stirring for 10-30min at 0 ℃, and reacting to obtain carboxylated graphene;
s2: weighing PBO fibers, adding carboxylated graphene into a polyphosphoric acid solution, ultrasonically vibrating for 10-20min, adding PBO fibers into a methanesulfonic acid solution, ultrasonically vibrating for 1-4h, mixing the two ultrasonically vibrated solutions, stirring at 160 ℃ for 20-40min, and reacting to generate carboxylated graphene grafted PBO fibers;
s3: weighing soda-lime-silica glass fiber, carrying out wet ball milling on the soda-lime-silica glass fiber, drying the obtained soda-lime-silica glass fiber powder at the temperature of 100 ℃ and 130 ℃ for 4-6h, adding the glass fiber powder into deionized water after drying, and then adding a coupling agent for carrying out ultrasound treatment for 10-20min to obtain an aminated glass powder solution;
s4: carrying out wet ball milling on the PBO fiber grafted by the carboxylated graphene, drying, carrying out ultrasonic dispersion to prepare PBO fiber dispersion liquid grafted by the carboxylated graphene, mixing the PBO fiber dispersion liquid grafted by the carboxylated graphene and a glass powder solution, adding the mixture into a mixed system of polyphosphoric acid and phosphoric acid, stirring for 20-40min at the temperature of 130-150 ℃, standing for 20min, and drying at the temperature of 100-120 ℃ under filtering vacuum to obtain the modified reinforced fiber.
8. The processing technology of the high-strength hard plastic scraper blade for the printer according to claim 7 is characterized in that:
the mixing time of the high-speed mixer is 3-8 min;
the extrusion temperature is 230-290 ℃, and the rotating speed is 300-600 r/min;
the injection molding temperature is 240-320 ℃, and the injection molding pressure is 100-150 MPa;
the mass ratio of the potassium chlorate to the graphene is 6-10, and the mass of the hydrogen peroxide is 5-10% of that of the graphene;
the mass ratio of the polyphosphoric acid to the graphene is 60-80, and the mass ratio of the methanesulfonic acid to the PBO fiber is 40-80.
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