CN114379052A - Preparation of glass fiber modified amino molding compound by dry one-step method - Google Patents
Preparation of glass fiber modified amino molding compound by dry one-step method Download PDFInfo
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- CN114379052A CN114379052A CN202111585660.7A CN202111585660A CN114379052A CN 114379052 A CN114379052 A CN 114379052A CN 202111585660 A CN202111585660 A CN 202111585660A CN 114379052 A CN114379052 A CN 114379052A
- Authority
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- Prior art keywords
- screw
- glass fiber
- molding compound
- preparing
- coupling agent
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- 239000003365 glass fiber Substances 0.000 title claims abstract description 40
- 238000000465 moulding Methods 0.000 title claims abstract description 40
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 title claims abstract description 35
- 150000001875 compounds Chemical class 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 37
- 238000002156 mixing Methods 0.000 claims abstract description 27
- 239000007822 coupling agent Substances 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 15
- 229920003180 amino resin Polymers 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 239000007864 aqueous solution Substances 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
- 239000002270 dispersing agent Substances 0.000 claims abstract description 8
- 239000011256 inorganic filler Substances 0.000 claims abstract description 8
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 8
- 239000000314 lubricant Substances 0.000 claims abstract description 8
- 239000000049 pigment Substances 0.000 claims abstract description 8
- 238000005507 spraying Methods 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 4
- 229920002678 cellulose Polymers 0.000 claims abstract description 4
- 239000001913 cellulose Substances 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- -1 melamine modified urea-formaldehyde resin Chemical class 0.000 claims description 10
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 9
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000004743 Polypropylene Substances 0.000 claims description 8
- 229920001155 polypropylene Polymers 0.000 claims description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 6
- NXQMCAOPTPLPRL-UHFFFAOYSA-N 2-(2-benzoyloxyethoxy)ethyl benzoate Chemical compound C=1C=CC=CC=1C(=O)OCCOCCOC(=O)C1=CC=CC=C1 NXQMCAOPTPLPRL-UHFFFAOYSA-N 0.000 claims description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 4
- 235000021355 Stearic acid Nutrition 0.000 claims description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 4
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims description 4
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 4
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 4
- 229920002545 silicone oil Polymers 0.000 claims description 4
- 239000008117 stearic acid Substances 0.000 claims description 4
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 4
- 229920000877 Melamine resin Polymers 0.000 claims description 3
- 229920000604 Polyethylene Glycol 200 Polymers 0.000 claims description 3
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical group OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- 229920002523 polyethylene Glycol 1000 Polymers 0.000 claims description 3
- 229940113116 polyethylene glycol 1000 Drugs 0.000 claims description 3
- 229940113115 polyethylene glycol 200 Drugs 0.000 claims description 3
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 3
- QMMJWQMCMRUYTG-UHFFFAOYSA-N 1,2,4,5-tetrachloro-3-(trifluoromethyl)benzene Chemical compound FC(F)(F)C1=C(Cl)C(Cl)=CC(Cl)=C1Cl QMMJWQMCMRUYTG-UHFFFAOYSA-N 0.000 claims description 2
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- 239000000440 bentonite Substances 0.000 claims description 2
- 229910000278 bentonite Inorganic materials 0.000 claims description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 2
- 239000008116 calcium stearate Substances 0.000 claims description 2
- 235000013539 calcium stearate Nutrition 0.000 claims description 2
- 239000006229 carbon black Substances 0.000 claims description 2
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 2
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 2
- 239000000347 magnesium hydroxide Substances 0.000 claims description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 2
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 2
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 claims description 2
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims description 2
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 claims description 2
- 229920003216 poly(methylphenylsiloxane) Polymers 0.000 claims description 2
- 229940057838 polyethylene glycol 4000 Drugs 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 claims description 2
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 2
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 2
- 229940048086 sodium pyrophosphate Drugs 0.000 claims description 2
- 235000019818 tetrasodium diphosphate Nutrition 0.000 claims description 2
- UKRDPEFKFJNXQM-UHFFFAOYSA-N vinylsilane Chemical compound [SiH3]C=C UKRDPEFKFJNXQM-UHFFFAOYSA-N 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims 2
- 239000002023 wood Substances 0.000 claims 2
- ZJOLCKGSXLIVAA-UHFFFAOYSA-N ethene;octadecanamide Chemical compound C=C.CCCCCCCCCCCCCCCCCC(N)=O.CCCCCCCCCCCCCCCCCC(N)=O ZJOLCKGSXLIVAA-UHFFFAOYSA-N 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000004898 kneading Methods 0.000 description 14
- 239000006185 dispersion Substances 0.000 description 7
- 239000004033 plastic Substances 0.000 description 7
- 229920003023 plastic Polymers 0.000 description 7
- 238000010008 shearing Methods 0.000 description 7
- 239000000047 product Substances 0.000 description 6
- 229920001187 thermosetting polymer Polymers 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 238000007872 degassing Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920001289 polyvinyl ether Polymers 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/287—Raw material pre-treatment while feeding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/397—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using a single screw
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- 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
- C08J2361/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
- C08J2361/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention discloses a dry one-step method for preparing a glass fiber modified amino molding compound, which comprises the following steps: preparing a dispersant, a lubricant and a coupling agent I into an aqueous solution A according to a proportion; putting amino resin powder, inorganic filler, wood pulp cellulose, a release agent and pigment into a horizontal paddle stirrer according to a certain proportion, stirring, uniformly spraying the aqueous solution A into the horizontal paddle stirrer by using a spraying machine, and adding the treated short chopped glass fibers; conveying the mixed materials to a hopper of a metering screw by using a screw conveyer; starting a reciprocating single-screw mixing extruder, and starting an oil pump, a main machine screw, a lateral feeder screw and a metering screw in sequence; after the materials are extruded from the reciprocating single-screw mixing extruder and agglomerated, the conveying and granulating equipment is started. The method can prepare the amino molding compound with excellent performance, can reduce the preparation procedures of amino molding, greatly improves the production efficiency of the molding compound, and reduces energy consumption and labor force.
Description
Technical Field
The invention belongs to the technical field of plastic manufacturing, and particularly relates to a dry one-step method for preparing a glass fiber modified amino molding compound.
Background
The amino molding plastic is a thermosetting plastic compounded by resin formed by copolycondensation of formaldehyde, urea, melamine and the like and various auxiliaries, and has the advantages of easiness in molding, low molding shrinkage, high dimensional precision, good processability and the like. The product has excellent heat resistance, flame retardance and good mechanical strength. The material can be widely applied to articles closely related to daily life, such as: door handle, toilet lid, bathroom rack, computer keyboard, mouse, fax telephone, ATM cash dispenser, children's supplies, toys, chess and so on. The product has excellent electrical insulation, resistance characteristic and insulation function, can strongly resist arc light, electric leakage, combustion and other adverse effects related to the application of electric appliances, and can be used for manufacturing shells of electric appliances, elevator buttons, electric appliance parts, brackets of coils, electric appliance switches and the like.
The fiber used by the amino molding compound is mainly alpha-cellulose, and the product has higher hardness and brittleness, but the strength, heat resistance and dimensional stability of the product cannot meet the requirements of the manufacture in the fields of high-performance electric fittings and the like. The traditional production process of the amino molding plastic has many working procedures, such as resin synthesis, kneading, drying, crushing, ball milling, screening and the like, and the injection molding material is required to be granulated and the like, so that the production efficiency is low.
As an inorganic fiber which is most widely used, the glass fiber can greatly improve the strength, heat resistance and dimensional stability of plastic products, and is rarely reported to be used for reinforcing epoxy, polyurethane, phenolic aldehyde, unsaturated polyester and other thermosetting plastics and for reinforcing amino plastics in the field of thermosetting plastics. On the other hand, the conventional process mostly uses a double-screw extrusion mixing roll to disperse the chopped glass fibers to prepare the glass fiber modified plastics, but the conventional double-screw extrusion process is not suitable for the glass fiber modified amino molding compound. When the glass fiber chopped strands are dispersed by a double-screw extruder, a large amount of heat is generated, the temperature of materials is rapidly increased, the amino molding compound is sensitive to heat and can be cured and molded at the temperature of over 120 ℃, when the glass fiber modified amino molding compound is prepared by using the double-screw extruder, the final product loses the processing performance because the friction temperature is too high, and the higher the content of the glass fiber is, the more serious the situation is.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a dry one-step method for preparing the glass fiber modified amino molding compound, which can be used for preparing the amino molding compound with excellent performance, simultaneously reducing the preparation procedures of amino molding, greatly improving the production efficiency of the molding compound and reducing the energy consumption and labor force.
In order to achieve the purpose, the invention adopts the following technical scheme that the method comprises the following steps:
(1) firstly, preparing a dispersant, a lubricant and a coupling agent I into an aqueous solution A for later use according to a proportion;
(2) starting a horizontal paddle stirrer, controlling the rotating speed at 80-120r/min, putting amino resin powder, inorganic filler, wood pulp cellulose, a release agent and pigment into the horizontal paddle stirrer in sequence according to the proportion, stirring for 10-20min, uniformly spraying the aqueous solution A prepared in the step (1) into the horizontal paddle stirrer by using a spraying machine, and continuously mixing and mixing the materials at the rotating speed of 80-120r/min for 10-20 min;
(3) adjusting the rotating speed of the horizontal paddle stirrer to 20-30r/min, adding the glass fiber short shreds treated by the coupling agent II, and slowly stirring and mixing for more than 20min to uniformly disperse the glass fiber short shreds in the material;
(4) starting the screw conveyor, adjusting the rotating speed of the screw conveyor to 15-20r/min, adjusting the rotating speed of the horizontal paddle stirrer to 10-20r/min, then opening a blanking valve of the horizontal paddle stirrer, and conveying the mixed materials to a hopper of a metering screw by using the screw conveyor;
(5) when the material in the metering screw hopper reaches 2/3, starting the reciprocating single-screw mixing extruder, and starting the oil pump, the main machine screw, the lateral feeder screw and the metering screw in sequence;
(6) slowly adjusting the rotating speeds of a main machine screw and a metering screw by 150r/min and 15r/min, and starting conveying and granulating equipment such as a tablet press, a belt conveyor, an air cooler, a crushing granulator and a vibrating screen after the materials are extruded and agglomerated from a reciprocating single-screw mixing extruder;
(7) starting a cooling water circulating pump, cooling the first zone by normal temperature water, wherein the temperature of the cooling water is lower than 35 ℃, cooling the second zone and the third zone by frozen water, and the temperature of the water is lower than 10 ℃; the water pressure is not lower than 0.8MPa, and the water quantity is intelligently controlled through an electromagnetic valve;
(8) observing the material temperature of three zones of the screw of the host, wherein the material temperature of the first zone is controlled to be 60-70 ℃, the material temperature of the second zone is controlled to be 80-90 ℃, and the material temperature of the third zone is controlled to be 105-; when the material temperature in the three areas is stable, the rotating speed of the main machine screw and the metering screw is slowly adjusted to 300r/min and 30r/min, the output is 500kg/h, and the production is carried out according to the process.
In the invention, further, before starting the main machine screw, the main machine screw needs to be preheated for at least 1h in advance, and the temperature of three zones is set as follows: the first zone is 50-60 deg.C, the second zone is 70-80 deg.C, and the third zone is 90-100 deg.C.
In the present invention, the amino resin powder is urea-formaldehyde resin powder, melamine-modified urea-formaldehyde resin, or the like.
In the invention, further, the inorganic filler is one or more of calcined kaolin, bentonite, calcium carbonate, mica powder, silicon micropowder, aluminum hydroxide, magnesium hydroxide, barium sulfate, montmorillonite powder and calcium sulfate.
In the invention, further, the lignocellulose is alpha-lignocellulose, and one or two of broadleaf alpha-lignocellulose and needle leaf alpha-lignocellulose are selected; the lignocellulose is preferably one of coniferous alpha-lignocellulose.
In the invention, further, the dispersant is one or more of sodium hexametaphosphate, sodium pyrophosphate, polyethylene glycol-200, polypropylene glycol-600, alkylphenol polyvinyl ether, butyl stearate and stearic acid amide.
In the invention, further, the lubricant is one or more of polyethylene glycol-1000, polyethylene glycol 4000, polypropylene glycol-1000, polypropylene glycol-4000, polypropylene glycol-330N, stearic acid complex ester, oleamide and erucamide, PE wax and diethylene glycol dibenzoate.
In the invention, further, the release agent is one or more of zinc stearate, stearic acid, ethylene bis-stearamide hard, calcium stearate, dimethyl silicone oil, methyl phenyl silicone oil and emulsified silicone oil.
In the invention, further, the coupling agent I is one or more of a silane coupling agent, a zirconium coupling agent, and a titanate coupling agent, preferably a silane coupling agent, and further preferably one or more of an epoxy silane coupling agent, a vinyl silane coupling agent, and an aminosilane coupling agent.
In the invention, further, the pigment is one or more of titanium dioxide, iron oxide red, iron oxide yellow, carbon black and chrome green.
Because the amino molding compound is thermosetting plastic, the amino resin components are subjected to crosslinking reaction by heating, and the amino molding compound is cured and molded. Screw parts such as material conveying blocks, dispersing kneading blocks and pins are extruded and rubbed with raw materials such as amino resin, glass fiber and the like during the rotation of the screw, a large amount of heat is generated, the heat plasticizes the amino resin, the amino resin and the glass fiber are uniformly dispersed, and meanwhile, cross-linking reaction is carried out between resin components, so that the molecular weight is increased. When the molecular weight is too large, the molding compound loses fluidity and becomes a waste material. The friction heat of the kneading blocks, the pins and the raw materials is the largest, so the number and the combination and arrangement mode of the kneading blocks of the screw machine are particularly important.
The invention adopts a kneading block combination mode of melting pre-dispersion and kneading mixing dispersion, namely the kneading blocks adopt a two-section type. The first section is a melting pre-dispersion area, is positioned in a second area of the host screw and adopts the spaced arrangement of two kneading blocks, namely a conveying block is arranged between the two kneading blocks; and the second kneading and mixing dispersing area is located in the third area of the screw and has three continuous kneading blocks. The first-stage melting pre-dispersion area and the second-stage kneading and mixing dispersion area are separated by five conveying blocks.
The reciprocating single-screw mixing extruder has the characteristics of uniform shearing, high dispersion, high filling, melt stretching and the like, integrates the advantages of single-screw and double-screw extruders, has a unique working principle, and can realize mixing, plasticizing, dispersing, shearing, stretching, degassing and granulating on one machine by adding a whole set of thread combined elements and matched equipment, so that the interface area of melt flowing in the machine is far larger than that of general shear flow. Moreover, since the screw thread of the kneading elements is interrupted, the pressure on the polymer is very low and no significant temperature rise occurs (twin-screw extruders shear the polymer in thin layers at high shear and high radial pressure, which inevitably causes a large temperature rise in the melt, affecting the principle of low-temperature extrusion of the material). Meanwhile, the reciprocating single-screw mixing extruder has gentle shearing, small damage to glass fiber and is suitable for high filling, especially for manufacturing thermosetting plastic products. The invention creatively adopts a reciprocating single-screw extruder and adopts a one-step dry process to mix, disperse and granulate amino resin, glass fiber and the like to prepare the high-performance glass fiber amino molding compound. By using the scheme, the amino molding compound with excellent performance can be prepared, the preparation procedures of the amino molding compound can be reduced, the production efficiency of the molding compound is greatly improved, and the energy consumption and the labor force are reduced.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail according to embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The raw materials of the glass fiber modified amino molding plastic are as follows: amino resin powder, glass fiber chopped strands treated by a coupling agent II, inorganic filler, lignocellulose, a dispersing agent, a lubricant, a release agent, a coupling agent I and pigment.
The inorganic filler is mica powder, the lignocellulose is needle-leaved alpha-lignocellulose, the dispersant is polyethylene glycol-200, the lubricant is polyethylene glycol-1000, the release agent is zinc stearate, the coupling agent I is an epoxy silane coupling agent, and the pigment is titanium dioxide.
The glass fiber short shreds have monofilament diameter of 5-15um and length of 3-6 mm; the selected short glass fiber shreds are treated by a coupling agent II, and the coupling agent II is an aminosilane coupling agent.
(1) Firstly, a dispersant, a lubricant and a coupling agent I are prepared into an aqueous solution A for later use according to a proportion.
(2) Starting the horizontal paddle stirrer, controlling the rotating speed at 80-120r/min, putting the amino resin powder, the inorganic filler, the wood pulp cellulose, the release agent and the pigment into the horizontal paddle stirrer in sequence according to the proportion, stirring for 10-20min, uniformly spraying the aqueous solution A prepared in the step (1) into the horizontal paddle stirrer by using a spraying machine, and continuously mixing and mixing the materials at the rotating speed of 80-120r/min for 10-20 min.
(3) Adjusting the rotating speed of the horizontal paddle stirrer to 20-30r/min, adding the glass fiber short shreds, and slowly stirring and mixing for more than 20min to uniformly disperse the glass fiber short shreds in the material.
(4) Starting the screw conveyor, adjusting the rotating speed of the screw conveyor to 15-20r/min, adjusting the rotating speed of the horizontal paddle stirrer to 10-20r/min, then opening a blanking valve of the horizontal paddle stirrer, and conveying the mixed materials to a hopper of a metering screw by using the screw conveyor.
(5) When the material in the metering screw hopper reaches 2/3, the reciprocating single screw mixing extruder is started, and the oil pump, the main machine screw, the lateral feeder screw and the metering screw are started in sequence. Before starting the host screw, the host screw needs to be preheated for at least 1h in advance, and the temperature of three zones is set as follows: the first zone is 50-60 deg.C, the second zone is 70-80 deg.C, and the third zone is 90-100 deg.C.
(6) Slowly adjusting the rotating speeds of the main machine screw and the metering screw by 150r/min and 15r/min, and starting conveying and granulating equipment such as a tablet press, a belt conveyor, an air cooler, a crushing granulator, a vibrating screen and the like after the materials are extruded and agglomerated from the reciprocating single-screw mixing extruder.
(7) Starting a cooling water circulating pump, cooling the first zone by normal temperature water, wherein the temperature of the cooling water is lower than 35 ℃, cooling the second zone and the third zone by frozen water, and the temperature of the water is lower than 10 ℃; the water pressure is not lower than 0.8MPa, and the water quantity is intelligently controlled by an electromagnetic valve.
(8) Observing the material temperature of three zones of the screw of the host, wherein the material temperature of the first zone is controlled to be 60-70 ℃, the material temperature of the second zone is controlled to be 80-90 ℃, and the material temperature of the third zone is controlled to be 105-; when the material temperature in the three areas is stable, the rotating speed of the main machine screw and the metering screw is slowly adjusted to 300r/min and 30r/min, the output is 500kg/h, and the production is carried out according to the process.
The preparation principle is as follows: the amino molding compound is thermosetting plastic, and the amino resin can be subjected to cross-linking reaction by heating, and is cured and molded. Thus, amino molding compounds are relatively temperature sensitive. The reciprocating single-screw mixing extruder has the characteristics of uniform shearing, high dispersion, high filling, melt stretching and the like. The advantages of single-screw and double-screw extruders and unique working principle are combined, and a whole set of thread combination elements and matched equipment are added, so that the mixing, plasticizing, dispersing, shearing, stretching, degassing and granulating can be realized on one machine, and the interface area of melt flowing in the machine is far larger than that of general shearing flow. Moreover, since the screw thread of the kneading elements is interrupted, the pressure acting on the polymer is small and no significant temperature rise occurs (whereas single-screw and twin-screw extruders shear thin layers of polymer under high shear and high radial pressure, which inevitably causes a large temperature rise in the melt, affecting the principle of low-temperature extrusion of the material). Meanwhile, the compound single-screw mixing extruder has gentle shearing and small damage to glass fibers, and is very suitable for preparing high-performance glass fiber amino molding compounds.
It should be noted that the above describes exemplifying embodiments of the invention. It will be understood by those skilled in the art, however, that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the scope of the invention as defined by the appended claims.
Claims (10)
1. The method for preparing the glass fiber modified amino molding compound by a dry one-step method is characterized by comprising the following steps of:
(1) firstly, preparing a dispersant, a lubricant and a coupling agent I into an aqueous solution A for later use according to a proportion;
(2) starting a horizontal paddle stirrer, controlling the rotating speed at 80-120r/min, putting amino resin powder, inorganic filler, wood pulp cellulose, a release agent and pigment into the horizontal paddle stirrer in sequence according to the proportion, stirring for 10-20min, uniformly spraying the aqueous solution A prepared in the step (1) into the horizontal paddle stirrer by using a spraying machine, and continuously mixing and mixing the materials at the rotating speed of 80-120r/min for 10-20 min;
(3) adjusting the rotating speed of the horizontal paddle stirrer to 20-30r/min, adding the glass fiber short shreds treated by the coupling agent II, and slowly stirring and mixing for more than 20min to uniformly disperse the glass fiber short shreds in the material;
(4) starting the screw conveyor, adjusting the rotating speed of the screw conveyor to 15-20r/min, adjusting the rotating speed of the horizontal paddle stirrer to 10-20r/min, then opening a blanking valve of the horizontal paddle stirrer, and conveying the mixed materials to a hopper of a metering screw by using the screw conveyor;
(5) when the material in the metering screw hopper reaches 2/3, starting the reciprocating single-screw mixing extruder, and starting the oil pump, the main machine screw, the lateral feeder screw and the metering screw in sequence;
(6) slowly adjusting the rotating speeds of a main machine screw and a metering screw by 150r/min and 15r/min, and starting conveying and granulating equipment such as a tablet press, a belt conveyor, an air cooler, a crushing granulator and a vibrating screen after the materials are extruded and agglomerated from a reciprocating single-screw mixing extruder;
(7) starting a cooling water circulating pump, cooling the first zone by normal temperature water, wherein the temperature of the cooling water is lower than 35 ℃, cooling the second zone and the third zone by frozen water, and the temperature of the water is lower than 10 ℃; the water pressure is not lower than 0.8MPa, and the water quantity is intelligently controlled through an electromagnetic valve;
(8) observing the material temperature of three zones of the screw of the host, wherein the material temperature of the first zone is controlled to be 60-70 ℃, the material temperature of the second zone is controlled to be 80-90 ℃, and the material temperature of the third zone is controlled to be 105-; when the material temperature in the three areas is stable, the rotating speed of the main machine screw and the metering screw is slowly adjusted to 300r/min and 30r/min, the output is 500kg/h, and the production is carried out according to the process.
2. The method for preparing the glass fiber modified amino molding compound according to claim 1, wherein: before starting the host screw, the host screw needs to be preheated for at least 1h in advance, and the temperature of three zones is set as follows: the first zone is 50-60 deg.C, the second zone is 70-80 deg.C, and the third zone is 90-100 deg.C.
3. The method for preparing the glass fiber modified amino molding compound according to claim 1, wherein: the amino resin powder is urea-formaldehyde resin powder, melamine formaldehyde resin powder or melamine modified urea-formaldehyde resin and the like.
4. The method for preparing the glass fiber modified amino molding compound according to claim 1, wherein: the inorganic filler is one or more of calcined kaolin, bentonite, calcium carbonate, mica powder, silicon micropowder, aluminum hydroxide, magnesium hydroxide, barium sulfate, montmorillonite powder and calcium sulfate.
5. The method for preparing the glass fiber modified amino molding compound according to claim 1, wherein: the lignocellulose is alpha-lignocellulose, and one or two of broad-leaved wood alpha-lignocellulose and coniferous wood alpha-lignocellulose are selected.
6. The method for preparing the glass fiber modified amino molding compound according to claim 1, wherein: the dispersing agent is one or more of sodium hexametaphosphate, sodium pyrophosphate, polyethylene glycol-200, polypropylene glycol-600, alkylphenol polyethenoxy ether, butyl stearate and stearic acid amide.
7. The method for preparing the glass fiber modified amino molding compound according to claim 1, wherein: the lubricant is one or more of polyethylene glycol-1000, polyethylene glycol 4000, polypropylene glycol-1000, polypropylene glycol-4000, polypropylene glycol-330N, stearic acid complex ester, oleamide and erucamide, PE wax and diethylene glycol dibenzoate.
8. The method for preparing the glass fiber modified amino molding compound according to claim 1, wherein: the release agent is one or more of zinc stearate, stearic acid, ethylene bis-stearic acid amide hard, calcium stearate, dimethyl silicone oil, methyl phenyl silicone oil and emulsified silicone oil.
9. The method for preparing the glass fiber modified amino molding compound according to claim 1, wherein: the coupling agent I is one or more of a silane coupling agent, a zirconium coupling agent and a titanate coupling agent, preferably a silane coupling agent, and preferably one or more of an epoxy silane coupling agent, a vinyl silane coupling agent and an aminosilane coupling agent.
10. The method for preparing the glass fiber modified amino molding compound according to claim 1, wherein: the pigment is one or more of titanium dioxide, iron oxide red, iron oxide yellow, carbon black and chrome green.
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| CN116023758A (en) * | 2023-02-15 | 2023-04-28 | 开化瑞达塑胶科技有限公司 | High-performance amino molding compound for structural part and preparation method thereof |
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| CN111499892A (en) * | 2020-06-04 | 2020-08-07 | 开化瑞达塑胶科技有限公司 | Preparation method of glass fiber reinforced high-strength heat-resistant amino molding compound |
| CN111534044A (en) * | 2020-06-04 | 2020-08-14 | 开化瑞达塑胶科技有限公司 | High-strength heat-resistant melamine molding compound and preparation method thereof |
| CN111892796A (en) * | 2020-06-28 | 2020-11-06 | 南京百美科技新材料有限公司 | Novel antibacterial amino molding plastic and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111499892A (en) * | 2020-06-04 | 2020-08-07 | 开化瑞达塑胶科技有限公司 | Preparation method of glass fiber reinforced high-strength heat-resistant amino molding compound |
| CN111534044A (en) * | 2020-06-04 | 2020-08-14 | 开化瑞达塑胶科技有限公司 | High-strength heat-resistant melamine molding compound and preparation method thereof |
| CN111892796A (en) * | 2020-06-28 | 2020-11-06 | 南京百美科技新材料有限公司 | Novel antibacterial amino molding plastic and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116023758A (en) * | 2023-02-15 | 2023-04-28 | 开化瑞达塑胶科技有限公司 | High-performance amino molding compound for structural part and preparation method thereof |
| CN116023758B (en) * | 2023-02-15 | 2023-10-17 | 开化瑞达塑胶科技有限公司 | High-performance amino molding compound for structural part and preparation method thereof |
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