CN104292626A - Modified PP automobile wheel casing and preparation method thereof - Google Patents
Modified PP automobile wheel casing and preparation method thereof Download PDFInfo
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- CN104292626A CN104292626A CN201410501284.2A CN201410501284A CN104292626A CN 104292626 A CN104292626 A CN 104292626A CN 201410501284 A CN201410501284 A CN 201410501284A CN 104292626 A CN104292626 A CN 104292626A
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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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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Abstract
The invention discloses a modified PP automobile wheel casing and a preparation method thereof. The preparation method of the modified PP automobile wheel casing comprises the following steps: weighing PP, SBS, EPDM, LLDPE, LDPE, PET, a crosslinking agent, sodium benzoate, triallyl isocyanurate, PA6, a plasticizer, SEP, diatomite, EPP and calcium carbonate according to a ratio in parts by weight, mixing, then extruding and pelletizing, and plastifying, so that the modified PP automobile wheel casing is obtained; the modified PP automobile wheel casing product has the properties that tensile strength is 35-55MPa, shore hardness is 94-98, elongation at break is 600-800%, notch impact strength is 600-800kJ/m, a heat distortion temperature is 140-150 DEG C, elastic modulus is 850-900MPa, and bending strength is 55-65MPa.
Description
Technical field
The application belongs to wheel cover of automobile preparation technology field, particularly relates to a kind of modified PP automobile wheel cover and preparation method thereof.
Background technology
Plastic decorative cover outside the hub for vehicle wheel that wheel cover of automobile refers to.Aluminium alloy wheel hub does not need to add hubcap, is all generally that the car of steel wheel hub is in order to use hubcap attractive in appearance.Hubcap is all generally plastics.The chemical stability that PP extrusion board has light weight, thickness is even, smooth surface is smooth, good heat resistance, physical strength are high, excellent and electrical insulating property, the feature such as nontoxic.PP plate is widely used in the fields such as pressure vessels for the chemical industry, machinery, electronics, electrical equipment, food product pack, medicine, decoration and water treatment.PP plate applied temps can reach 100 degree.Automotive industry (the main PP using containing metallic additive: mud guard, vent-pipe, fan etc.), apparatus (dish washing machine door liner, drying machine vent-pipe, washing machine frame and cover, refrigerator door spacer etc.), daily necessities (lawn and gardening equipment are as grass mower and water-jet etc.).Crystallization material, water absorbability is little, melt body easily occurs and breaks, and long-term contact with thermometal is easily decomposed.Good fluidity, but the scope of contraction and shrinkage value are greatly, and shrinkage cavity, indenture, distortion easily occur.Speed of cooling is fast, and gating system and cooling system should slowly dispel the heat, and attentional manipulation mold temperature. easy orientation during material temperature cryogenic high pressure, when die temperature is lower than 50 degree, plastic is rough, and easily generation welding is bad, and current mark, more than 90 degree easily buckling deformation occur.Plastics wall thickness evenly, must avoid starved, wedge angle, in case stress concentration.Polypropylene by filling, strengthening, blended, copolymerization, be cross-linked modification.As added the fillers such as calcium carbonate, talcum powder, inorganic mineral, rigidity, hardness, thermotolerance and dimensional stability can be improved; Add glass fibre, fibrous magnesium silicate, mica, glass microballon etc. and can improve tensile strength, and creep resistance, low-temperature impact resistance can be improved; Add elastomerics and rubber etc. and can improve impact property, the transparency etc.Polypropylene adopts Ziegler-Natta catalyst make propylene catalyzed polymerization and obtain, and it is the crystallization shape isotactic polymer that building block arranges very regular.Polypropylene English Polypropylene by name, is called for short below PP(or is called for short PP), be commonly called as polypropylene (PP).Polypropylene can be divided into isotatic polypropylene and random by its degree of crystallinity, and isotatic polypropylene is the thermoplastic resin of highly crystalline, and degree of crystallinity is up to more than 95%, and molecular weight is between 8 ~ 150,000, and the polypropylene below introduced is mainly isotatic polypropylene.And Atactic Polypropelene is at room temperature a kind of amorphous, micro-adhesive White waxy thing, molecular weight low (3000 ~ 10000), structure irregularity lacks force of cohesion, applies less.
Wheel cover majority refer to some low side vehicles for steel wheel, but outside can put the ornamental article of an aluminium matter or other materials, its shape has a bit as aluminium wheels.Wheel cover is cast member, concentric with wheel, is contained in lateral wheel, plays the effect of decoration and anti-muddy water.Polypropylene English name: Polypropylene, is called for short: PP, is commonly called as: polypropylene (PP).Polypropylene is the representative of poly-alpha olefins, a kind of thermoplastic resin obtained by propylene polymerization, and monomer whose is propylene CH2=CH-CH3.According to the difference of initiator and polymerization technique, polypropylene can be divided into isotatic polypropylene and Atactic Polypropelene and syndiotactic polypropylene three kinds of configurations.Isotatic polypropylene easily forms crystal form, and degree of crystallinity is up to more than 95%, and molecular weight, between 8-15 ten thousand, gives him good heat resistanceheat resistant and good solubility-resistence; Atactic Polypropelene is at room temperature a kind of amorphous, micro-adhesive White waxy thing, and molecular weight is low, and at 3000-10000, structure irregularity lacks force of cohesion, applies less.Polypropylene English name: Polypropylene, is called for short: PP, is commonly called as: polypropylene (PP).Polypropylene is the representative of poly-alpha olefins, a kind of thermoplastic resin obtained by propylene polymerization, and monomer whose is propylene CH2=CH-CH3.According to the difference of initiator and polymerization technique, polypropylene can be divided into isotatic polypropylene and Atactic Polypropelene and syndiotactic polypropylene three kinds of configurations.Isotatic polypropylene easily forms crystal form, and degree of crystallinity is up to more than 95%, and molecular weight, between 8-15 ten thousand, gives him good heat resistanceheat resistant and good solubility-resistence; Atactic Polypropelene is at room temperature a kind of amorphous, micro-adhesive White waxy thing, and molecular weight is low, and at 3000-10000, structure irregularity lacks force of cohesion, applies less.PP polypropylene chemical and physical property PP are a kind of semi-crystalline material.It is harder and have higher fusing point than PE.Because the PP temperature of homopolymer type is highly brittle higher than during more than 0C, therefore the PP material of much business adds the Random copolymer RCP of 1 ~ 4% ethene or the pincers segmentation multipolymer of more height ratio ethylene content.The PP material of copolymer type has lower hot torsion temperature (100C), low transparency, low-luster, low rigidity, but has stronger resistance to impact shock.The intensity of PP increases along with the increase of ethylene content.The vicat softening temperature of PP is 150C.Because degree of crystallinity is higher, surface rigidity and the anti-scratch characteristic of this material are fine.There is not environmental stress cracking problem in PP.Usually, adopt add glass fibre, the method for metal additive or thermoplastic rubber carries out modification to PP.The turnover rate MFR scope of PP is 1 ~ 40.The PP material impact property of low MFR is better but ductility/strength is lower.For the material of identical MFR, wanting of the strength ratio homopolymer type of copolymer type is high.Due to crystallization, the shrinking percentage of PP is quite high, is generally 1.8 ~ 2.5%.And the direction homogeneity of shrinking percentage is more far better than materials such as PE-HD.The glass additive adding 30% can make shrinking percentage drop to 0.7%.The PP material of homopolymer type and copolymer type all has excellent resistance to water soak, antiacid caustic corrosion, resist dissolution.But it does not have resistibility to aromatic hydrocarbon (as benzene) solvent, chlorinated hydrocarbon (tetracol phenixin) solvent etc.
Wheel cover has been decoration function, attractive in appearance.In fact also play the left and right of protection steel ring.It can reduce high temperature and unexpected rainwater cooling can to the damage of paint.Be exactly dust in addition, so as not to always wanting carwash.PP is a kind of semi-crystalline material.It is harder and have higher fusing point than PE.Because the PP temperature of PP goods homopolymer type is highly brittle higher than when more than 0 DEG C, therefore the PP material of much business adds the Random copolymer RCP of 1 ~ 4% ethene or the blocked multipolymer of more height ratio ethylene content.The PP material of copolymer type has lower hot torsion temperature (100 DEG C), low transparency, low-luster, low rigidity, but has stronger resistance to impact shock.The intensity of PP increases along with the increase of ethylene content.The vicat softening temperature of PP is 150 DEG C.Because degree of crystallinity is higher, surface rigidity and the anti-scratch characteristic of this material are fine.There is not environmental stress cracking problem in PP.Usually, adopt add glass fibre, the method for metal additive or thermoplastic rubber carries out modification to PP.The turnover rate MFR scope of PP is 1 ~ 40.The PP material impact property of low MFR is better but ductility/strength is lower.For the material of identical MFR, wanting of the strength ratio homopolymer type of copolymer type is high.Due to crystallization, the shrinking percentage of PP is quite high, is generally 1.8 ~ 2.5%.And the direction homogeneity of shrinking percentage is more far better than materials such as PE-HD.The glass additive adding 30% can make shrinking percentage drop to 0.7%.The PP material of homopolymer type and copolymer type all has excellent resistance to water soak, antiacid caustic corrosion, resist dissolution.But it does not have resistibility to aromatic hydrocarbon (as benzene) solvent, chlorinated hydrocarbon (tetracol phenixin) solvent etc.PP does not resemble PE yet at high temperature still has oxidation-resistance.Polypropylene (PP) is one lighter in common plastics, its excellent electrical property, can be used as wet-heat resisting high-frequency insulation materials application.PP belongs to crystalline polymer, during melt condensation because of specific volume change greatly, degree of molecular orientation is high and present shrinking percentage (1.0%-1.5%) greatly.In the molten state, the effect reducing its viscosity with heating up is little for PP.Therefore in molding process, should to improve injection pressure and shearing rate, to improve the Forming Quality of goods.
Chinese patent CN 103434227A discloses a kind of lightweight, high tenacity, high sound-absorbing wheel cover of automobile backplate thermoplastic composite and preparation technology thereof, by comprising superimposed successively non-woven fabrics from bottom to top, toughened film, inorganic modified thermoplastic composite, toughened film, non-woven fabrics, described inorganic modified thermoplastic composite is based on thermoplastic resin fibre and fortifying fibre, and the reinforcing filler containing powdery, good rigidity can be provided, toughened film provides excellent impelling strength, the combination of fleut and fiber then can provide outstanding sound absorption qualities, ensure that the comfortableness that automobile is taken.In addition, program resulting product is adopted, simple process, can continuous seepage, toughness controllable, and cost is lower than PP+EPDM system, can be used as young mobile wheel house matrix material to promote, but tensile strength is low and extension at break rate variance; Chinese patent CN103146154A discloses a kind of PET composite material, preparation method and application thereof, adopts 60 ~ 70 parts of PET, 0.1 ~ 0.5 portion of nucleator, 0.5 ~ 1.5 part of lubricant, 0.2 ~ 0.5 part of oxidation inhibitor, 2 ~ 5 parts of compatilizers and 30 ~ 40 parts of glass fibre.The preparation method of PET composite material of the present invention is as follows: by 60 ~ 70 parts of PET, 0.1 ~ 0.5 portion of nucleator, 0.5 ~ 1.5 part of lubricant, 0.2 ~ 0.5 part of oxidation inhibitor and 2 ~ 5 parts of compatilizers, join in homogenizer, mixing 5 ~ 10min obtains uniform pre-composition; The pre-composition obtained is joined in the hopper of forcing machine, adds 30 ~ 40 parts of glass fibre at side spout, carry out extruding pelletization, obtain PET composite material, be then directly injection molded into wheel cover of automobile.Compared with the metallic substance used with present wheel cover of automobile or plastics, relative low price, the forming method of the matrix material that the present invention obtains are relatively simple, the goods adopting matrix material of the present invention to prepare do not need to adopt process just can carry out spraying paint and process or paint baking, but notched Izod impact strength and shore hardness low.And universal along with humanity concept, and the formation of novel harmonious society, designs that a kind of notched Izod impact strength is high, tensile strength is high, elongation at break is high and modified PP automobile wheel cover that shore hardness is high and preparation method thereof is very important.
Summary of the invention
the technical problem solved:
The application, for above-mentioned technical problem, provides a kind of modified PP automobile wheel cover and preparation method thereof, solves the technical problems such as existing modified PP automobile wheel cover notched Izod impact strength, tensile strength, elongation at break and shore hardness are low.
technical scheme:
A kind of modified PP automobile wheel cover, the raw materials by weight portion proportioning of described modified PP automobile wheel cover is as follows: PP100 part; SBS10-30 part; EPDM10-30 part; LLDPE25-45 part; LDPE5-25 part; PET20-40 part; Linking agent 0.5-2.5 part; Sodium Benzoate 0.2-0.8 part; Cyanacrylate 0.1-2 part; PA6 is 10-20 part; Softening agent 1-20 part; SEP is 1-25 part; Diatomite 15-35 part; EPP25-45 part; Calcium carbonate is 30-50 part.
As a preferred technical solution of the present invention: the raw materials by weight portion proportioning of described modified PP automobile wheel cover is as follows: PP100 part; SBS15-25 part; EPDM15-25 part; LLDPE30-40 part; LDPE10-20 part; PET25-35 part; Linking agent 1-2 part; Sodium Benzoate 0.4-0.6 part; Cyanacrylate 0.5-1.5 part; PA6 is 13-17 part; Softening agent 5-15 part; SEP is 10-20 part; Diatomite 20-30 part; EPP30-40 part; Calcium carbonate is 35-45 part.
As a preferred technical solution of the present invention: the raw materials by weight portion proportioning of described modified PP automobile wheel cover is as follows: PP100 part; SBS20 part; EPDM20 part; LLDPE35 part; LDPE15 part; PET30 part; Linking agent 1.5 parts; Sodium Benzoate 0.5 part; Cyanacrylate 1 part; PA6 is 15 parts; 10 parts, softening agent; SEP is 15 parts; 25 parts, diatomite; EPP35 part; Calcium carbonate is 40 parts.
As a preferred technical solution of the present invention: described linking agent adopts DCP or chlorinatedpolyethylene.
As a preferred technical solution of the present invention: described softening agent adopts DOP or DBP.
As a preferred technical solution of the present invention: the preparation method of described modified PP automobile wheel cover, comprises the steps:
The first step: take PP, SBS, EPDM, LLDPE, LDPE, PET, linking agent, Sodium Benzoate, cyanacrylate, PA6, softening agent, SEP, diatomite, EPP and calcium carbonate according to parts by weight proportioning;
Second step: PA6, PET, SBS, SEP and Sodium Benzoate are dropped in reactor and is heated to 60-70 DEG C, dry 10-12h;
3rd step: then add EPDM, LLDPE, LDPE and EPP, be warming up to 80-90 DEG C, stirs 10-30min;
4th step: the material after stirring is dropped into extruding pelletization in forcing machine, barrel temperature 210 DEG C, 225 DEG C and 240 DEG C, screw speed 11-15r/min;
5th step: add surplus stock, twin-roll plastic mixing mill plastifies, plasticization temperature 170-190 DEG C.
As a preferred technical solution of the present invention: the stirring velocity in described 3rd step is 200-400 rev/min.
As a preferred technical solution of the present invention: in described 4th step, forcing machine is single screw extrusion machine.
beneficial effect:
A kind of modified PP automobile wheel cover of the present invention and preparation method thereof adopts above technical scheme compared with prior art, has following technique effect: 1, product tensile strength 35-55MPa, shore hardness 94-98; 2, elongation at break 600-800%, notched Izod impact strength 600-800kJ/m; 3, heat-drawn wire 140-150 DEG C, Young's modulus 850-900MPa; 4, flexural strength 55-65MPa, the widespread production not division of history into periods can replace current material.
Embodiment
embodiment 1:
PP100 part is taken according to parts by weight proportioning; SBS10 part; EPDM10 part; LLDPE25 part; LDPE5 part; PET20 part; Chlorinatedpolyethylene 0.5 part; Sodium Benzoate 0.2 part; Cyanacrylate 0.1 part; PA6 is 10 parts; DBP1 part; SEP is 1 part; 15 parts, diatomite; EPP25 part; Calcium carbonate is 30 parts.
PA6, PET, SBS, SEP and Sodium Benzoate are dropped in reactor and be heated to 60 DEG C, dry 10h, then adds EPDM, LLDPE, LDPE and EPP, is warming up to 80 DEG C, and stir 10min, stirring velocity is 200 revs/min.
Material after stirring is dropped into extruding pelletization in single screw extrusion machine, barrel temperature 210 DEG C, 225 DEG C and 240 DEG C, screw speed 11r/min, adds surplus stock, and twin-roll plastic mixing mill plastifies, plasticization temperature 170 DEG C.
Product tensile strength 35MPa, shore hardness 94; Elongation at break 600%, notched Izod impact strength 600kJ/m; Heat-drawn wire 140 DEG C, Young's modulus 850MPa, flexural strength 55MPa.
embodiment 2:
PP100 part is taken according to parts by weight proportioning; SBS30 part; EPDM30 part; LLDPE45 part; LDPE25 part; PET40 part; Chlorinatedpolyethylene 2.5 parts; Sodium Benzoate 0.8 part; Cyanacrylate 2 parts; PA6 is 20 parts; DBP20 part; SEP is 25 parts; 35 parts, diatomite; EPP45 part; Calcium carbonate is 50 parts.
PA6, PET, SBS, SEP and Sodium Benzoate are dropped in reactor and be heated to 70 DEG C, dry 12h, then adds EPDM, LLDPE, LDPE and EPP, is warming up to 90 DEG C, and stir 30min, stirring velocity is 400 revs/min.
Material after stirring is dropped into extruding pelletization in single screw extrusion machine, barrel temperature 210 DEG C, 225 DEG C and 240 DEG C, screw speed 15r/min, adds surplus stock, and twin-roll plastic mixing mill plastifies, plasticization temperature 190 DEG C.
Product tensile strength 40MPa, shore hardness 95; Elongation at break 650%, notched Izod impact strength 650kJ/m; Heat-drawn wire 144 DEG C, Young's modulus 860MPa, flexural strength 58MPa.
embodiment 3:
PP100 part is taken according to parts by weight proportioning; SBS15 part; EPDM15 part; LLDPE30 part; LDPE10 part; PET25 part; DCP1 part; Sodium Benzoate 0.4 part; Cyanacrylate 0.5 part; PA6 is 13 parts; DBP5 part; SEP is 10 parts; 20 parts, diatomite; EPP30 part; Calcium carbonate is 35 parts.
PA6, PET, SBS, SEP and Sodium Benzoate are dropped in reactor and be heated to 60 DEG C, dry 10h, then adds EPDM, LLDPE, LDPE and EPP, is warming up to 80 DEG C, and stir 15min, stirring velocity is 250 revs/min.
Material after stirring is dropped into extruding pelletization in single screw extrusion machine, barrel temperature 210 DEG C, 225 DEG C and 240 DEG C, screw speed 12r/min, adds surplus stock, and twin-roll plastic mixing mill plastifies, plasticization temperature 175 DEG C.
Product tensile strength 45MPa, shore hardness 96; Elongation at break 700%, notched Izod impact strength 700kJ/m; Heat-drawn wire 145 DEG C, Young's modulus 880MPa, flexural strength 60MPa.
embodiment 4:
PP100 part is taken according to parts by weight proportioning; SBS25 part; EPDM25 part; LLDPE40 part; LDPE20 part; PET35 part; DCP2 part; Sodium Benzoate 0.6 part; Cyanacrylate 1.5 parts; PA6 is 17 parts; DOP15 part; SEP is 20 parts; 30 parts, diatomite; EPP40 part; Calcium carbonate is 45 parts.
PA6, PET, SBS, SEP and Sodium Benzoate are dropped in reactor and be heated to 66 DEG C, dry 12h, then adds EPDM, LLDPE, LDPE and EPP, is warming up to 88 DEG C, and stir 25min, stirring velocity is 350 revs/min.
Material after stirring is dropped into extruding pelletization in single screw extrusion machine, barrel temperature 210 DEG C, 225 DEG C and 240 DEG C, screw speed 14r/min, adds surplus stock, and twin-roll plastic mixing mill plastifies, plasticization temperature 185 DEG C.
Product tensile strength 50MPa, shore hardness 97; Elongation at break 750%, notched Izod impact strength 750kJ/m; Heat-drawn wire 146 DEG C, Young's modulus 890MPa, flexural strength 63MPa.
embodiment 5:
PP100 part is taken according to parts by weight proportioning; SBS20 part; EPDM20 part; LLDPE35 part; LDPE15 part; PET30 part; DCP1.5 part; Sodium Benzoate 0.5 part; Cyanacrylate 1 part; PA6 is 15 parts; DOP10 part; SEP is 15 parts; 25 parts, diatomite; EPP35 part; Calcium carbonate is 40 parts.
PA6, PET, SBS, SEP and Sodium Benzoate are dropped in reactor and be heated to 65 DEG C, dry 11h, then adds EPDM, LLDPE, LDPE and EPP, is warming up to 85 DEG C, and stir 20min, stirring velocity is 300 revs/min.
Material after stirring is dropped into extruding pelletization in single screw extrusion machine, barrel temperature 210 DEG C, 225 DEG C and 240 DEG C, screw speed 13r/min, adds surplus stock, and twin-roll plastic mixing mill plastifies, plasticization temperature 180 DEG C.
Product tensile strength 55MPa, shore hardness 98; Elongation at break 800%, notched Izod impact strength 800kJ/m; Heat-drawn wire 150 DEG C, Young's modulus 900MPa, flexural strength 65MPa.
Composition all components in above embodiment all can business be bought.
Above-described embodiment is just for setting forth content of the present invention, instead of restriction, and any change therefore in the implication suitable with claims of the present invention and scope, all should think to be included in the scope of claims.
Claims (8)
1. a modified PP automobile wheel cover, is characterized in that the raw materials by weight portion proportioning of described modified PP automobile wheel cover is as follows: PP100 part; SBS10-30 part; EPDM10-30 part; LLDPE25-45 part; LDPE5-25 part; PET20-40 part; Linking agent 0.5-2.5 part; Sodium Benzoate 0.2-0.8 part; Cyanacrylate 0.1-2 part; PA6 is 10-20 part; Softening agent 1-20 part; SEP is 1-25 part; Diatomite 15-35 part; EPP25-45 part; Calcium carbonate is 30-50 part.
2. a kind of modified PP automobile wheel cover according to claim 1, is characterized in that described modified PP automobile wheel cover raw materials by weight portion proportioning is as follows: PP100 part; SBS15-25 part; EPDM15-25 part; LLDPE30-40 part; LDPE10-20 part; PET25-35 part; Linking agent 1-2 part; Sodium Benzoate 0.4-0.6 part; Cyanacrylate 0.5-1.5 part; PA6 is 13-17 part; Softening agent 5-15 part; SEP is 10-20 part; Diatomite 20-30 part; EPP30-40 part; Calcium carbonate is 35-45 part.
3. a kind of modified PP automobile wheel cover according to claim 1, is characterized in that the raw materials by weight portion proportioning of described modified PP automobile wheel cover is as follows: PP100 part; SBS20 part; EPDM20 part; LLDPE35 part; LDPE15 part; PET30 part; Linking agent 1.5 parts; Sodium Benzoate 0.5 part; Cyanacrylate 1 part; PA6 is 15 parts; 10 parts, softening agent; SEP is 15 parts; 25 parts, diatomite; EPP35 part; Calcium carbonate is 40 parts.
4. a kind of modified PP automobile wheel cover according to claim 1, is characterized in that: described linking agent adopts DCP or chlorinatedpolyethylene.
5. a kind of modified PP automobile wheel cover according to claim 1, is characterized in that: described softening agent adopts DOP or DBP.
6. a preparation method for modified PP automobile wheel cover described in claim 1, is characterized in that, comprise the steps:
The first step: take PP, SBS, EPDM, LLDPE, LDPE, PET, linking agent, Sodium Benzoate, cyanacrylate, PA6, softening agent, SEP, diatomite, EPP and calcium carbonate according to parts by weight proportioning;
Second step: PA6, PET, SBS, SEP and Sodium Benzoate are dropped in reactor and is heated to 60-70 DEG C, dry 10-12h;
3rd step: then add EPDM, LLDPE, LDPE and EPP, be warming up to 80-90 DEG C, stirs 10-30min;
4th step: the material after stirring is dropped into extruding pelletization in forcing machine, barrel temperature 210 DEG C, 225 DEG C and 240 DEG C, screw speed 11-15r/min;
5th step: add surplus stock, twin-roll plastic mixing mill plastifies, plasticization temperature 170-190 DEG C.
7. the preparation method of modified PP automobile wheel cover according to claim 6, is characterized in that: the stirring velocity in described 3rd step is 200-400 rev/min.
8. the preparation method of modified PP automobile wheel cover according to claim 6, is characterized in that: in described 4th step, forcing machine is single screw extrusion machine.
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| CN105367903A (en) * | 2015-12-09 | 2016-03-02 | 无锡拓能自动化科技有限公司 | Multielement-blended PP used for lithium batteries, and preparation method thereof |
| CN105802009A (en) * | 2016-03-24 | 2016-07-27 | 叶青 | EPP plastic alloy |
| CN106221137A (en) * | 2016-07-25 | 2016-12-14 | 江苏祺胜现代新材料有限公司 | A kind of heat-insulating flame-retardant wheelhouse portions and preparation technology thereof |
| CN110655720A (en) * | 2019-10-22 | 2020-01-07 | 合肥泰宇汽车零部件有限公司 | Process for producing automobile hub protective cover |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104592630A (en) * | 2015-01-07 | 2015-05-06 | 浙江大学 | Polypropylene compound having excellent low-temperature toughness and rigidity-toughness balance and preparation method of polypropylene compound |
| CN105367903A (en) * | 2015-12-09 | 2016-03-02 | 无锡拓能自动化科技有限公司 | Multielement-blended PP used for lithium batteries, and preparation method thereof |
| CN105802009A (en) * | 2016-03-24 | 2016-07-27 | 叶青 | EPP plastic alloy |
| CN106221137A (en) * | 2016-07-25 | 2016-12-14 | 江苏祺胜现代新材料有限公司 | A kind of heat-insulating flame-retardant wheelhouse portions and preparation technology thereof |
| CN110655720A (en) * | 2019-10-22 | 2020-01-07 | 合肥泰宇汽车零部件有限公司 | Process for producing automobile hub protective cover |
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Application publication date: 20150121 |