CN102924807A - Special thin-wall polypropylene composite for bumpers and preparation method thereof - Google Patents
Special thin-wall polypropylene composite for bumpers and preparation method thereof Download PDFInfo
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- CN102924807A CN102924807A CN2012104617270A CN201210461727A CN102924807A CN 102924807 A CN102924807 A CN 102924807A CN 2012104617270 A CN2012104617270 A CN 2012104617270A CN 201210461727 A CN201210461727 A CN 201210461727A CN 102924807 A CN102924807 A CN 102924807A
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Abstract
The invention discloses a special thin-wall polypropylene composite for bumpers and a preparation method thereof. The special thin-wall polypropylene composite for bumpers is characterized by comprising the following raw materials by weight percentages: 44-78 percent of polypropylene, 0-2 percent of heat stabilizer, 0-2 percent of processing agent, 0-2 percent of special nucleating agent for polypropylene, 5-15 percent of flexibilizer, 0-10 percent of compatilizer, 15-20 percent of ultrafine talcum powder and 2-5 percent of chopped flat glass fiber. The preparation method comprises the following steps that after the raw materials are mixed, the mixture is added into a double-screw extruder with the length-diameter ratio of (30-60):1 to be molten and dispersed, and meanwhile, the chopped flat glass fiber is fed from a side feeding mouth to be extruded and pelletized. The composite has the advantages of high liquidity, high stiffness, high heat resistance, high size stability and high impact resistance and meets the thin wall requirement of the bumpers.
Description
Technical field
The present invention relates to polypropylene dedicated matrix material of a kind of thin-walled property bumper and preparation method thereof, belong to technical field of polymer materials.
Background technology
Bumper is the security device that absorbs the foreign impacts power that relaxes, protection vehicle body front and rear part.The bumper major part all adopts the plastics manufacturing at present, and wherein polypropylene composite material is to make the first-selection of collision bumper.
Along with the development bumper of automotive industry has also moved towards on the road of innovation as a kind of important security device.The car front/rear collision bumper of today also will be pursued harmony and unification with the car body moulding, the lightweight of pursuit itself except keeping original defencive function.The light-weighted main direction of collision bumper is thin-walled property trend at present, reduces the usage quantity of material, thereby reaches the purpose of vehicle body loss of weight, saves oil consumption.
At present the wall thickness of main flow collision bumper is generally 3mm, and the wall thickness of thin-walled property collision bumper is generally 2.5mm, and is lower even reach 2mm.The difficult problem that the collision bumper thin-walled property faces is, mechanical property after must Guarantee Insurance thick stick thin-walled property especially rigidity is not suffered a loss, traditional collision bumper generally adopts talc to increase rigidity with polypropylene composite material, simultaneously for guaranteeing its toughness, add a large amount of thermoplastic elastomers, and talcum powder is commonly used reinforcing filler after the collision bumper thin-walled property as collision bumper, and rigidity descends rapidly, therefore develops the polypropylene dedicated matrix material of thin-walled property collision bumper imperative.
The present invention adopts polypropylene, thermoplastic elastomer, superfine talcum powder, chopped flat glass fiber (flatfiber), thermo-stabilizer, illumination stablizer, the special-purpose nucleator blend of polypropylene to prepare a kind of polypropylene dedicated matrix material of thin-walled property bumper of super-high fluidity, this matrix material is owing to adopting flat glass fiber (flat fiber) to substitute the part superfine talcum powder, not only significantly improved polypropylene composite material rigidity and thermotolerance, made thin-walled property collision bumper afterwards that enough rigidity be arranged.Simultaneously because the cross section of flat glass fiber presents flats, fabric integer presents similar talcous sheet structure, therefore flowability is higher than common rounded section glass fibre far away, the product surface is not floating fine, and the distribution in product inside trends towards isotropy in the injection moulding process, therefore also can not produce the buckling deformation phenomenon that general glass fiber reinforced materials occurs.
Summary of the invention
The purpose of this invention is to provide polypropylene dedicated matrix material of a kind of thin-walled property bumper and preparation method thereof, the defective that exists to overcome prior art satisfies the needs that the bumper thin-walled property develops.
In order to achieve the above object, the invention provides the polypropylene dedicated matrix material of a kind of thin-walled property bumper, it is characterized in that, made by following raw material by weight percentage:
Polypropylene 44-78%;
Thermo-stabilizer 0-2%;
Processing aid 0-2%;
Sorbitol Nucleator 0-2%;
Toughner 5-15%;
Compatilizer 0-10%;
Superfine talcum powder 1 5-20%;
Chopped flat glass fiber 2-5%.
Preferably, described polypropylene is homopolymerization, Co-polypropylene or both mixtures, and its melt flow rate (MFR) is 50-1000g/10min.
Preferably, described thermo-stabilizer is phenols, phosphorous acid ester type thermal stabilizing agent or both mixtures.
Preferably, described processing aid is stearic acid complex ester class processing aid.
Preferably, described toughner is the styrene-butadiene-styrene of ethylene-octene copolymer, hydrogenation and any one or two or more mixtures in the ethylene-propylene diene copolymer.
Preferably, described compatilizer is the polar monomer graft polymkeric substance.
More preferably, described polar monomer graft polymkeric substance is maleic anhydride inoculated polypropylene, maleic anhydride grafted ethene-α-ethylene-octene copolymer or the mixture of the two.
Preferably, described chopped flat glass fiber (flat fiber) is the special-purpose alkali-free short glass fiber of polypropylene, and its glass cross section is flats, and the cross section flakiness ratio is 2-10: 1.
The present invention also provides above-mentioned thin-walled property bumper polypropylene dedicated composite manufacture method, it is characterized in that, concrete steps are: after polypropylene, thermo-stabilizer, processing aid, Sorbitol Nucleator, toughner, superfine talcum powder and compatilizer are mixed, the adding length-to-diameter ratio is 30-60: melting disperses in 1 the twin screw extruder, simultaneously chopped flat glass fiber is added the twin screw extruder extruding pelletization from the side spout by the weight-loss metering scale.
Preferably, the length-to-diameter ratio of described twin screw extruder is 40: 1, and each section temperature of this twin screw extruder when extruding pelletization is all 190-240 ℃.
The present invention adopts chopped flat glass fiber (flat fiber) Substitute For Partial superfine talcum powder, has increased rigidity of material, satisfies the demand of bumper thin-walled property, and flat glass can not cause product surface floating fiber and buckling deformation simultaneously.
In addition, the effect of the thermo-stabilizer among the present invention is to suppress the degraded that polypropylene produces in the course of processing; The effect of processing aid is the good dispersion that promotes between each composition of blend; The effect of Sorbitol Nucleator is the crystallization rate that improves in the material injection moulding process, shortening injection molding cycle; The effect of toughner is to increase the toughness of material under low-temperature condition, prevents product embrittlement under extreme low temperature; The effect of compatilizer is the interface compatibility that increases between polypropylene and the chopped flat glass fiber.
The present invention adopts flat glass fiber Substitute For Partial talcum powder, has greatly improved rigidity and the thermotolerance of bumper material, and the collision bumper thin-walled property is more easily realized.In addition, the used flat glass fiber of the present invention is different from the traditional glass fiber, because the cross section is flats, has the characteristics of high workability and isotropy, has overcome the easy warpage of traditional glass fiber and floating fine serious shortcoming.
Embodiment
For the present invention is become apparent, hereby with preferred embodiment, be described in detail below.
Embodiment 1
The first step: with 75 kilograms of polypropylene PP BX3900 (available from China Petrochemical Industry), 0.2 kilogram phenols thermo-stabilizer Irganox1010 (four [β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester), 0.3 kilogram phosphorous acid ester type thermal stabilizing agent Irganox168 (three [2,4-di-tert-butyl-phenyl] phosphorous acid ester), 0.3 kilogram processing aid EBS, 0.2 kilogram Sorbitol Nucleator TMP-5 (available from Shanxi-Prov Inst of Chemical Industry), 5 kilograms of ethylene-octene copolymer POE LC670 (available from Korea S LG chemistry), 2 kilograms of maleic anhydride grafted ethene-α-ethylene-octene copolymers (moulding safe polymer Science and Technology Ltd. available from Nanjing), 15 kilogram of 3000 order superfine talcum powder adopts high mixer fully to mix;
Second step: the mixture that the first step is obtained is transported to length-to-diameter ratio melting in 60: 1 the twin screw extruder take 98 kg/hours speed to be disperseed, (flakiness ratio is 2: 1 with 2 kilograms of chopped alkali-free flat glass fibers simultaneously, length is 3mm) add from the speed of side spout with 2 kg/hours by the weight-loss metering scale, extruding pelletization, each of forcing machine section temperature is made as 190 ℃, obtains the polypropylene dedicated matrix material of thin-walled property bumper.After tested, its performance is as follows:
Table 1
| Performance | Unit | Testing standard | Test result |
| Density | g/cm 3 | ISO1183-93 | 0.97 |
| Melt flow rate (MFR) | g/10min | ISO1133-93 | 32 |
| Tensile strength | MPa | ISO527/2-93 | 22 |
| Modulus in flexure | MPa | ISO178-93 | 2580 |
| 23 ℃ of notched Izod impact strength | KJ/m 2 | ISO180-93 | 42 |
| -30 ℃ of notched Izod impact strength | KJ/m 2 | ISO180-93 | 11.2 |
| Heat-drawn wire (0.45Mpa) | ℃ | ISO75-93 | 122 |
Embodiment 2
The first step: adopt high mixer fully to mix 64 kilograms of polypropylene PP EP640T, 0.5 kilogram of phenols thermo-stabilizer Irganox1010,0.5 kilogram of phosphorous acid ester type thermal stabilizing agent Irganox168,0.5 kilogram of processing aid EB-FF, 0.5 kilogram of Sorbitol Nucleator TM-3,5 kilograms of POE POE8130,4 kilograms of maleic anhydride inoculated polypropylene Bondyram1001CN PP, 20 kilogram of 5000 order superfine talcum powder;
Second step: the mixture that the first step is obtained is transported to length-to-diameter ratio melting in 30: 1 the twin screw extruder take 95 kg/hours speed to be disperseed, (flakiness ratio is 6: 1 with 5 kilograms of chopped alkali-free flat glass fibers simultaneously, length is 3mm) add from the speed of side spout with 5 kg/hours by the weight-loss metering scale, extruding pelletization, each of forcing machine section temperature is made as 220 ℃, obtains the polypropylene dedicated matrix material of thin-walled property bumper.After tested, its performance is as follows:
Table 2
| Performance | Unit | Testing standard | Test result |
| Density | g/cm 3 | ISO1183-93 | 1.01 |
| Melt flow rate (MFR) | g/10min | ISO1133-93 | 38 |
| Tensile strength | MPa | ISO527/2-93 | 26 |
| Modulus in flexure | MPa | ISO178-93 | 2850 |
| 23 ℃ of notched Izod impact strength | KJ/m 2 | ISO180-93 | 45 |
| -30 ℃ of notched Izod impact strength | KJ/m 2 | ISO180-93 | 13.5 |
| Heat-drawn wire (0.45Mpa) | ℃ | ISO75-93 | 126 |
Embodiment 3
The first step: adopt high mixer fully to mix the styrene-butadiene-styrene SEBS3159 of 44 kilograms of polypropylene PP BX3920,1 kilogram of phenols thermo-stabilizer agent Irganox1010,1 kilogram of phosphorous acid ester type thermal stabilizing agent Ultranox627A, 2 kilograms of processing aid Zinic stearass, 2 kilograms of Sorbitol Nucleator Millad3988,15 kilograms of hydrogenations, 10 kilograms of maleic anhydride inoculated polypropylene Bondyram1001,20 kilogram of 3000 order talcum powder;
Second step: the mixture that the first step is obtained is transported to length-to-diameter ratio melting in 40: 1 the twin screw extruder take 95 kg/hours speed to be disperseed, (flakiness ratio is 10: 1 with 5 kilograms of chopped alkali-free flat glass fibers simultaneously, length is 3mm) add from the speed of side spout with 5 kg/hours by the weight-loss metering scale, extruding pelletization, each of forcing machine section temperature is made as 240 ℃, obtains the polypropylene dedicated matrix material of thin-walled property bumper.After tested, its performance is as follows:
Table 3
| Performance | Unit | Testing standard | Test result |
| Density | g/cm 3 | ISO1183-93 | 1.05 |
| Melt flow rate (MFR) | g/10min | ISO1133-93 | 47 |
| Tensile strength | MPa | ISO527/2-93 | 29 |
| Modulus in flexure | MPa | ISO178-93 | 3100 |
| 23 ℃ of notched Izod impact strength | KJ/m 2 | ISO180-93 | 49 |
| -30 ℃ of notched Izod impact strength | KJ/m 2 | ISO180-93 | 15.9 |
| Heat-drawn wire (0.45Mpa) | ℃ | ISO75-93 | 130 |
Embodiment 4
The first step: with 68 kilograms of polypropylene PP BX3800,0.2 kilogram phenols thermo-stabilizer Irganox101O, 0.3 kilogram phosphorous acid ester type thermal stabilizing agent Ultranox627A, 0.3 kilogram processing aid Zinic stearas M-80A (available from moulding in the Qingdao), 0.2 kilogram Sorbitol Nucleator TMP-5 (available from Shanxi-Prov Inst of Chemical Industry), 5 kilograms of POE POE LC670, the styrene-butadiene-styrene SEBS3159 of 5 kilograms of hydrogenations, 1 kilogram of maleic anhydride inoculated polypropylene CA-100,1 kilogram of maleic anhydride grafted ethene-α-ethylene-octene copolymer SZ41P, 15 kilogram of 3000 order superfine talcum powder adopts high mixer fully to mix;
Second step: the mixture that the first step is obtained is transported to length-to-diameter ratio in 40: 1 twin screw extruder take 96 kg/hours speed, melting mixing is disperseed, (flakiness ratio is 2: 1 with 4 kilograms of chopped alkali-free flat glass fibers simultaneously, length is 3mm) add from the speed of side spout with 4 kg/hours by the weight-loss metering scale, extruding pelletization, each of forcing machine section temperature is made as 190 ℃, obtains the polypropylene dedicated matrix material of thin-walled property bumper.After tested, its performance is as follows:
Table 4
| Performance | Unit | Testing standard | Test result |
| Density | g/cm 3 | ISO1183-93 | 0.96 |
| Melt flow rate (MFR) | g/10min | ISO1133-93 | 33 |
| Tensile strength | MPa | ISO527/2-93 | 23 |
| Modulus in flexure | MPa | ISO178-93 | 2650 |
| 23 ℃ of notched Izod impact strength | KJ/m 2 | ISO180-93 | 41 |
| -30 ℃ of notched Izod impact strength | KJ/m 2 | ISO180-93 | 11 |
| Heat-drawn wire (0.45Mpa) | ℃ | ISO75-93 | 120 |
Embodiment 5
The first step: with 24 kilograms of polypropylene PP EP640T, 20 kilograms of polypropylene PP BX3920,1 kilogram of phenols thermo-stabilizer Irganox1010,1 kilogram of phosphorous acid ester type thermal stabilizing agent Irganox168,2 kilograms of processing aid EB-FF, 2 kilograms of Sorbitol Nucleator YS-688,10 kilograms of POE POE8130,5 kilograms of terpolymer EP rubber EPDM3072EM, 10 kilograms of maleic anhydride inoculated polypropylene Bondyram1001CN PP, 20 kilogram of 4000 order superfine talcum powder adopts high mixer fully to mix;
Second step: the mixture that the first step is obtained is transported to length-to-diameter ratio in 40: 1 twin screw extruder take 95 kg/hours speed, melting mixing is disperseed, (flakiness ratio is 6: 1 with 5 kilograms of chopped alkali-free flat glass fibers simultaneously, length is 3mm) add from the speed of side spout with 5 kg/hours by the weight-loss metering scale, extruding pelletization, each of forcing machine section temperature is made as 220 ℃, obtains the polypropylene dedicated matrix material of thin-walled property bumper.After tested, its performance is as follows:
Table 5
| Performance | Unit | Testing standard | Test result |
| Density | g/cm 3 | ISO1183-93 | 1.01 |
| Melt flow rate (MFR) | g/10min | ISO1133-93 | 38 |
| Tensile strength | MPa | ISO527/2-93 | 26 |
| Modulus in flexure | MPa | ISO178-93 | 2850 |
| 23 ℃ of notched Izod impact strength | KJ/m 2 | ISO180-93 | 45 |
| -30 ℃ of notched Izod impact strength | KJ/m 2 | ISO180-93 | 13.5 |
| Heat-drawn wire (0.45Mpa) | ℃ | ISO75-93 | 126 |
Embodiment 6
The first step: adopt high mixer fully to mix 51 kilograms of polypropylene PP BX3920,1 kilogram of phenols thermo-stabilizer Irganox1010,1 kilogram of phosphorous acid ester type thermal stabilizing agent Ultranox627A, 2 kilograms of processing aid Zinic stearass, 1 kilogram of Sorbitol Nucleator TM-3,1 kilogram of Sorbitol Nucleator TMP-5,12 kilograms of POE POE8137,10 kilograms of maleic anhydride grafted ethene-α-ethylene-octene copolymer SZ41P, 18 kilogram of 4000 order talcum powder;
Second step: the mixture that the first step is obtained is transported to length-to-diameter ratio in 40: 1 twin screw extruder take 97 kg/hours speed, melting mixing is disperseed, (flakiness ratio is 10: 1 with 3 kilograms of chopped alkali-free flat glass fibers simultaneously, length is 3mm) add from the speed of side spout with 3 kg/hours by the weight-loss metering scale, extruding pelletization, each of forcing machine section temperature is made as 240 ℃, obtains the polypropylene dedicated matrix material of thin-walled property bumper.After tested, its performance is as follows:
Table 6
| Performance | Unit | Testing standard | Test result |
| Density | g/cm 3 | ISO1183-93 | 1.04 |
| Melt flow rate (MFR) | g/10min | ISO1133-93 | 45 |
| Tensile strength | MPa | ISO527/2-93 | 29 |
| Modulus in flexure | MPa | ISO178-93 | 3100 |
| 23 ℃ of notched Izod impact strength | KJ/m 2 | ISO180-93 | 49 |
| -30 ℃ of notched Izod impact strength | KJ/m 2 | ISO180-93 | 15.9 |
| Heat-drawn wire (0.45Mpa) | ℃ | ISO75-93 | 130 |
Material provided by the invention has super-high fluidity, high rigidity, high heat-resisting, high-dimensional stability, HI high impact, satisfies the thin-walled property requirement of bumper.After testing, the melt flow rate (MFR) 〉=30g/10min of the polypropylene composite material of the present invention's preparation, tensile strength 〉=20MPa, modulus in flexure 〉=2500MPa, (23 ℃) notched Izod impact strength 〉=40KJ/m
2, (30 ℃) notched Izod impact strength 〉=10KJ/m
2, heat-drawn wire (0.45Mpa) 〉=120 ℃.
The present invention adopts flat glass fiber Substitute For Partial talcum powder, compared with prior art, rigidity and the thermotolerance of bumper material have been improved greatly, the collision bumper thin-walled property is more easily realized, the used flat glass fiber of simultaneously the present invention is different from the traditional glass fiber, because the cross section is flats, has the characteristics of high workability and isotropy, the easy warpage of traditional glass fiber and floating fine serious shortcoming have been overcome.
Claims (10)
1. the polypropylene dedicated matrix material of thin-walled property bumper is characterized in that, is made by following raw material by weight percentage:
Polypropylene 44-78%;
Thermo-stabilizer 0-2%;
Processing aid 0-2%;
Sorbitol Nucleator 0-2%;
Toughner 5-15%;
Compatilizer 0-10%;
Superfine talcum powder 15-20%;
Chopped flat glass fiber 2-5%.
2. the polypropylene dedicated matrix material of thin-walled property bumper as claimed in claim 1 is characterized in that, described polypropylene is homopolymerization, Co-polypropylene or both mixtures, and its melt flow rate (MFR) is 50-1000g/10min.
3. the polypropylene dedicated matrix material of thin-walled property bumper as claimed in claim 1 is characterized in that, described thermo-stabilizer is phenols, phosphorous acid ester type thermal stabilizing agent or both mixtures.
4. the polypropylene dedicated matrix material of thin-walled property bumper as claimed in claim 1 is characterized in that, described processing aid is stearic acid complex ester class processing aid.
5. the polypropylene dedicated matrix material of thin-walled property bumper as claimed in claim 1, it is characterized in that, described toughner is the styrene-butadiene-styrene of ethylene-octene copolymer, hydrogenation and any one or two or more mixtures in the ethylene-propylene diene copolymer.
6. the polypropylene dedicated matrix material of thin-walled property bumper as claimed in claim 1 is characterized in that, described compatilizer is the polar monomer graft polymkeric substance.
7. the polypropylene dedicated matrix material of thin-walled property bumper as claimed in claim 6, it is characterized in that, described polar monomer graft polymkeric substance is maleic anhydride inoculated polypropylene, maleic anhydride grafted ethene-α-ethylene-octene copolymer or the mixture of the two.
8. the polypropylene dedicated matrix material of thin-walled property bumper as claimed in claim 1 is characterized in that, described chopped flat glass fiber is the special-purpose alkali-free short glass fiber of polypropylene, and its glass cross section is flats, and the cross section flakiness ratio is 2-10: 1.
9. the polypropylene dedicated composite manufacture method of thin-walled property bumper claimed in claim 1, it is characterized in that, concrete steps are: after polypropylene, thermo-stabilizer, processing aid, Sorbitol Nucleator, toughner, superfine talcum powder and compatilizer are mixed, the adding length-to-diameter ratio is 30-60: melting disperses in 1 the twin screw extruder, simultaneously chopped flat glass fiber is added the twin screw extruder extruding pelletization from the side spout by the weight-loss metering scale.
10. the polypropylene dedicated composite manufacture method of thin-walled property bumper as claimed in claim 9 is characterized in that, the length-to-diameter ratio of described twin screw extruder is 40: 1, and each section temperature of this twin screw extruder when extruding pelletization is all 190-240 ℃.
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| CN103254504A (en) * | 2013-04-28 | 2013-08-21 | 青岛国恩科技股份有限公司 | Special-purpose weather-resisting anti-shock polypropylene material for automobile bumper and preparation method |
| CN103265755A (en) * | 2013-05-08 | 2013-08-28 | 上海纳米技术及应用国家工程研究中心有限公司 | Multiple composite modified polypropylene plastic and preparation method thereof |
| CN103275393A (en) * | 2013-05-28 | 2013-09-04 | 苏州润佳工程塑料股份有限公司 | Glass fiber composite material applied to thin-walled part and preparation method thereof |
| CN104479216A (en) * | 2014-11-20 | 2015-04-01 | 苏州新区佳合塑胶有限公司 | Automobile diversion plate material |
| CN105348642A (en) * | 2015-11-20 | 2016-02-24 | 南京聚隆科技股份有限公司 | High fluidity, high modulus, high impact strength polypropylene material used for vehicle bumpers, and preparation method thereof |
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| CN103254504A (en) * | 2013-04-28 | 2013-08-21 | 青岛国恩科技股份有限公司 | Special-purpose weather-resisting anti-shock polypropylene material for automobile bumper and preparation method |
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| CN108070159A (en) * | 2016-11-18 | 2018-05-25 | 合肥杰事杰新材料股份有限公司 | It is a kind of for low after-contraction PP composite material of car insurance bar and preparation method thereof |
| CN108047627A (en) * | 2017-12-25 | 2018-05-18 | 会通新材料股份有限公司 | It is a kind of to exempt from spray coating polypropylene composite material and preparation method thereof with scratch resistant, metallic silver texture |
| CN109749243A (en) * | 2018-12-29 | 2019-05-14 | 江苏和伟美科技发展有限公司 | A kind of high glaze, it is resistance to be precipitated, low warpage enhancing halogen-free polypropylene flame redardant and preparation method thereof |
| CN111484679A (en) * | 2019-09-27 | 2020-08-04 | 四川鑫达企业集团有限公司 | High-rigidity, high-toughness and high-fluidity polypropylene composite material and preparation method thereof |
| CN113061303A (en) * | 2020-01-02 | 2021-07-02 | 合肥杰事杰新材料股份有限公司 | Glass fiber reinforced polypropylene material and preparation method thereof |
| CN112409700A (en) * | 2020-11-19 | 2021-02-26 | 江苏金发科技新材料有限公司 | High-performance polypropylene composite material for vehicles and preparation method thereof |
| WO2024066525A1 (en) * | 2022-09-27 | 2024-04-04 | 天津金发新材料有限公司 | Reinforced polypropylene composite material, preparation method therefor, and use thereof |
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Application publication date: 20130213 |