CN108395630A - A kind of automobile-used micro-foaming polypropylene composite material and preparation method thereof - Google Patents
A kind of automobile-used micro-foaming polypropylene composite material and preparation method thereof Download PDFInfo
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- CN108395630A CN108395630A CN201810358429.6A CN201810358429A CN108395630A CN 108395630 A CN108395630 A CN 108395630A CN 201810358429 A CN201810358429 A CN 201810358429A CN 108395630 A CN108395630 A CN 108395630A
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Abstract
The invention discloses a kind of automobile-used micro-foaming polypropylene composite materials and preparation method thereof, which has following raw materials according to be prepared by weight percentage：Polypropylene 60~80%；Toughener 4~20%；Talcum powder 5~20%；Foaming master batch 0.5~2.5%；Antioxidant 0.2~0.8%；Light stabilizer 0.1~0.5%；Other additives 0.5~2%；Wherein, polypropylene includes the first copolymer polypropylene and the second copolymer polypropylene, and the first copolymer polypropylene is the copolymer polypropylene of high fluidity, and the second copolymer polypropylene is the copolymer polypropylene of high-impact.Low in raw material price of the present invention, the processing performance and mechanical property of composite material are improved, with abscess dense uniform, good fluidity, good toughness, high-impact, the features such as dimensional stability is high, it can be used for producing constructional foaming product, be highly suitable to be applied for automotive light weight technology, while its preparation process is simpler, it is easily operated, production efficiency also higher.
Description
Technical field
The present invention relates to polymeric material fields, and in particular to a kind of automobile-used micro-foaming polypropylene composite material and its preparation
Method.
Background technology
Current era, with being increasingly enhanced for people's environmental consciousness, the material for developing low-carbon environment-friendly has become mainstream,
And automotive material develops towards comfortable, safe and light-weighted direction and also becomes a kind of inexorable trend.
PP composite material is due to excellent mechanical property and high cost performance, being widely used in automobile zero
Component.It is molded polypropylene material and is rigidly better than polyethylene (PE) expanded material, and there is higher heat distortion temperature, highest makes
130 DEG C, significantly larger than 80 DEG C of polyethylene (PE) expanded material are can reach with temperature, it is often more important that, easy recycling,
Degradable, product is free of to human body and the harmful substance of environment, can keep higher while realizing significantly loss of weight
Mechanical performance, therefore accelerating ability and the security performance of automobile can be improved etc., it has also become one of important materials of automotive light weight technology.
General grade polypropylene poor fluidity, intensity is low, and quick mold filling is difficult in injection molding process, is not suitable for fretting map
Shooting Technique；And the specific surface areas such as conventional fillers such as talcum powder, calcium carbonate and mica are small, bad dispersibility, it is difficult to which heterogeneous nucleation is led
Cause material abscess big and cave in serious, the mechanical performance and product of severe exacerbation micro foaming composite material are apparent, limit its
The application in the fields such as automobile.
Invention content
To overcome deficiencies of the prior art, a kind of processing performance of present invention offer and mechanical property to be carried
High automobile-used micro-foaming polypropylene composite material and preparation method thereof.The invention is realized by the following technical scheme：It is a kind of automobile-used
Micro-foaming polypropylene composite material has following raw materials according to be prepared by weight percentage：
The polypropylene includes the first copolymer polypropylene and the second copolymer polypropylene, and first copolymer polypropylene is high flows
The copolymer polypropylene of dynamic property, second copolymer polypropylene are the copolymer polypropylene of high-impact.
Preferably, first copolymer polypropylene is under 230 DEG C, the test condition of 2.16kg, melt flow rate (MFR) 60
~250g/10min, second copolymer polypropylene is under conditions of pendulum energy 2.75J, v-notch depth are 2mm, cantilever
Beam notch impact strength is more than 40KJ/m2。
Preferably, second copolymer polypropylene, required rubber content is more than 15wt%, in 230 DEG C, the test of 2.16kg
Under the conditions of, melt flow rate (MFR) is 0.5~30g/10min.
Preferably, the weight ratio of first copolymer polypropylene and second copolymer polypropylene is 1:0.15~0.46.
Preferably, the toughener includes the first ethylene-octene copolymer and the second ethylene-octene copolymer, the increasing
Tough dose under 190 DEG C, the test condition of 2.16kg, melt flow rate (MFR) is 3~40g/10min.
Preferably, the talcum powder is crystallite of the surface by silanes, aluminate or titante coupling agent processing
Talcum powder.
Preferably, the talcum powder grain size be 1~3 μm, purity ＞ 99% and be free of carbonate components.
Preferably, first ethylene-octene copolymer is under 190 DEG C, the test condition of 2.16kg, melt flow rate (MFR)
For 10~30g/10min, second ethylene-octene copolymer has more excellent elongation at break.
Preferably, the foaming master batch is thermal equilibrium type foaming agent.
The present invention also provides a kind of preparation methods of any of the above-described automobile-used micro-foaming polypropylene composite material, including
Following steps：
A. according to the weight percentage of raw materials by polypropylene, toughener, talcum powder, antioxidant, light stabilizer and other additions
Agent is placed in dry-mixed 3~5min in mixing machine；
B. semi-finished product obtained by step a are placed in melting mixing in double screw extruder, extruding pelletization, wherein the extruder
Temperature of each section is followed successively by：175~180 DEG C of first segment, remaining each section is 180~200 DEG C；
C. by after semi-finished product cooling obtained by step b, foaming master batch according to the weight percentage of raw materials is added, foamed is made
Material；
Using twice-die-opening technique, foamed material described in step c is added to progress fretting map injection molding in injection molding machine, injection molding
Temperature is 185~205 DEG C, is discharged to get finished product.
Low in raw material price of the present invention, the processing performance and mechanical property of composite material are improved, conducive to quickly filling
Mould also has the features such as abscess dense uniform, good fluidity, good toughness, high-impact, dimensional stability is high, can be used for producing knot
Structure Foamed article is highly suitable to be applied for automotive light weight technology, while its preparation process is simpler, easily operated, production efficiency
Higher.
Specific implementation mode
The present invention is further described With reference to embodiment：
In preparing raw material needed for automobile-used micro-foaming polypropylene composite material：
Polypropylene weight percentage is 60~80%, and preferably by high crystalline, the first copolymerization of high melt flow rate (MFR)
Polypropylene (is such as provided by Co., Ltd of SK Chemical, trade names areThe copolymer polypropylene of BX3920) and high-impact
Second copolymer polypropylene (is such as provided by Taiwan plastics industry Co., Ltd, the copolymerization that trade names are YUNGSOX 5200XT gathers
Propylene) it compounds, which can improve the processing performance and shock resistance mechanical property of material simultaneously.When it is implemented, as one kind
Preferred embodiment, for the first copolymer polypropylene under 230 DEG C, the test condition of 2.16kg, melt flow rate (MFR) is 60~250g/
10min, under conditions of pendulum energy 2.75J, v-notch depth are 2mm, notch impact strength is more than the second copolymer polypropylene
40KJ/m2.Second copolymer polypropylene is further preferably under 230 DEG C, the test condition of 2.16kg, melt flow rate (MFR) 0.5
~30g/10min, the second copolymer polypropylene rubber content are more than 15wt%.
Toughener weight percent is 4~20%, including the first ethylene-octene copolymer and the copolymerization of the second ethylene-octene
Object, for toughener under 190 DEG C, the test condition of 2.16kg, melt flow rate (MFR) is 3~40g/10min.First ethylene-octene
The copolymer further preferably mobility that has had, specifically, under 190 DEG C, the test condition of 2.16kg, melt flows are fast
Rate is 10~30g/10min, is such as provided by DOW Chemical Co., Ltd, trade names ENGAGETM8407 polyolefin elastic
Body, the second ethylene-octene copolymer further preferably have more excellent elongation at break, are such as provided by LG Chemical Co., Ltd.s, quotient
Brand number is LuceneTMThe polyolefin elastomer of LC175.On the one hand the compounding of two kinds of ethylene-octene copolymers can reduce toughening
Influence of the agent to material flowability, while may make micro foaming composite material that there is good impact resistance again.
Talcum powder weight percent is 5~20%, and preferably surface is by silanes, aluminate or titanate ester coupling
The micro-talcum powder of agent processing.Using the traditional lamella talcum powder of micro-talcum powder substitution as foaming nucleation agent and reinforcing filler,
With unique small lamellar structure, large specific surface area, modified talcum powder can both reduce surface polarity to improve and poly- third
The compatibility of alkene is conducive to the nucleation density and expansion ratio that improve expanded material, reduces cell diameter, while can keep
Enhancing effect.The further preferred talcum powder grain size of talcum powder is 1~3 μm, purity ＞ 99% and is free of carbonate components, with into one
Step increases talcum powder specific surface area, improves dispersion performance, more conducively heterogeneous nucleation.
Foaming master batch weight percent is 0.5~2.5%, as an example, the preferably modified double benzene sulfonyls of 4,4 oxos
Hydrazine (OBSH) the thermal equilibrium type foaming agent EE-30C made with the mixture of azodicarbonamide (AC), specifically, 4,4 oxos are double
The mixture of benzene sulfonyl hydrazide and azodicarbonamide, is modified by stearate, using EVA, LDPE base material master batch, concentration 20%
~40%, the obtained thermal balance combined foaming agent of 180~220 DEG C of decomposition temperature.Thermal equilibrium type foaming agent foam effect is more preferable.
Antioxidant weight percent is 0.2~0.8%, preferably includes primary antioxidant and auxiliary anti-oxidant, and primary antioxidant can be with
Select the combination of Hinered phenols antioxidant such as 1076, one or more of 1010；Auxiliary anti-oxidant can select phosphite or
One or more of esters antioxidant such as 168, P-EPQ mixtures.
Light stabilizer weight percent is 0.1~0.5%, preferably in hindered amines, benzophenone, benzotriazole
One or more combination, such as the composition of one or both of STA-137 and UV-P.
Other weight of additive percentages are 0.5~2%, can be one kind or several in dispersant, lubricant and toner
The composition of kind.
The composite material prepared by above-mentioned raw materials, expansion ratio are 1.5~4, and foaming aperture is 50~80 μm, and abscess is fine and close
Uniformly, no even hole and collapse phenomenon.
The present invention is further described with reference to specific embodiment：
In embodiment and comparative example composite-material formula：
Polypropylene includes the copolymer polypropylene 1 provided by Co., Ltd of SK Chemical, and trade names areBX3920；
The copolymer polypropylene 2 provided by Taiwan plastics industry Co., Ltd, trade names are YUNGSOX 5200XT；It is limited by SK Chemical
The copolymer polypropylene 3 that company provides, trade names areBX3800。
Toughener includes two kinds, a kind of by the offer of LG Chemical Co., Ltd.s, trade names LuceneTMThe polyene of LC175
Olefin elastomer, it is a kind of by the offer of DOW Chemical Co., Ltd, trade names ENGAGETM8407 polyolefin elastomer.
Superfine microcrystal talcum powder is provided by jade of the He family Chemical Co., Ltd., trade names HTP05L, mesh number 11000
Mesh；Conventional talcum powder is provided by Liaoning CNT Group Ltd., trade names KC-6300, and mesh number is 2800 mesh；It is ultra-fine to change
Property blanc fixe by south China Xin Yang Science and Technology Ltd.s provide, trade names AB-03N, mesh number be 3000 mesh.
Foaming master batch is that modified 4,4 oxobenzenesulfonyl hydrazide (OBSH) and the mixture of azodicarbonamide (AC) are made
Thermal equilibrium type foaming agent EE-30C, OBSH foaming agent is provided by Japanese Yonghe County's chemical conversion industry Co., Ltd., trade names EE-
25A；AC foaming agents are provided by Shun Tai rubber and plastics Science and Technology Ltd., trade mark SA1000.
Primary antioxidant be BASF AG production 1010, trade names be Irganox 1010, chemical name be four [β-(3,
5- di-tert-butyl-hydroxy phenyls) propionic acid] pentaerythritol ester；Auxiliary anti-oxidant is what Zibo Xiang Dong Chemical Co., Ltd.s provided
168, trade names A0168, chemical name are three [2.4- di-tert-butyl-phenyls] phosphite esters.
Light stabilizer is the production of rising star Chemical Co., Ltd.5585 and BASF AG production UV-P, commodity board
Number be Tinuvin P.
Related data are obtained according to following test method：
1. melt flow rate (MFR) (MFR) is measured according to ISO1133, for polypropene composition, test temperature is 230 DEG C,
Load is 2.16KG.
2. tensile property is tested by GB/T 1040.1-2006, test speed corresponds to 50mm/min；
3. bending property is tested by GB/T 9341-2008, test speed corresponds to 5mm/min；
4. overhanging beam notch impact strength is tested by GB/T 1843-2008, pendulum energy 2.75J, v-notch is deep
Degree is 2mm.
5. heat distortion temperature is tested by GB/T 1634-2004,0.45MPa is loaded.
Embodiment 1
It weighs by weight ratio：
80wt% polypropylene includes mainly copolymer polypropylene 1 and copolymer polypropylene 2, mass ratio 2.48:1；
The mass ratio of 13wt% toughener, two kinds of toughener is 0.71:1；
5wt% micro-talcum powder；
0.2wt% primary antioxidants 1010,0.2wt% auxiliary anti-oxidants 168；
0.3wt% light stabilizers 5585；
0.8wt% dispersants；And
0.5wt% black race is put into blending 3~5min, rotating speed 800rpm in high-speed mixer, then together by said mixture
It is added to melting mixing in double screw extruder, extruding pelletization, extruder temperature of each section is followed successively by：175~180 DEG C of first segment,
Remaining each section is 180~200 DEG C；The residence time of entire extrusion is 1~2min, pressure 18MPa.
0.5wt%EE-30C foaming agent master batches are added in pellet after the cooling period, foamed material is made, using twice-die-opening
The foamed material of acquisition is added in injection molding machine progress fretting map injection molding by technique, and injection temperature is 185 DEG C, discharging to get at
Product.
Embodiment 2
It weighs by weight ratio：
75wt% polypropylene includes mainly copolymer polypropylene 1 and copolymer polypropylene 2, mass ratio 2.75:1；
The mass ratio of 15wt% toughener, two kinds of toughener is 0.55:1；
8wt% micro-talcum powder；
0.1wt% primary antioxidants 1010,0.1wt% auxiliary anti-oxidants 168；
0.2wt% light stabilizers 5585；
0.6wt% dispersants；And
1wt% black race is put into blending 3~5min, rotating speed 800rpm in high-speed mixer, then said mixture is added together
Enter into double screw extruder melting mixing, extruding pelletization, extruder temperature of each section is followed successively by：175~180 DEG C of first segment,
Remaining each section is 180~200 DEG C；The residence time of entire extrusion is 1~2min, pressure 20MPa.
1wt%EE-30C foaming agent master batches are added in pellet after the cooling period, foamed material is made, using twice-die-opening work
The foamed material of acquisition is added to progress fretting map injection molding in injection molding machine by skill, and injection temperature is 190 DEG C, is discharged to get finished product.
Embodiment 3
It weighs by weight ratio：
69wt% polypropylene includes mainly copolymer polypropylene 1 and copolymer polypropylene 2, mass ratio 3.31:1；
The mass ratio of 17wt% toughener, two kinds of toughener is 0.7:1；
12wt% micro-talcum powder；
0.1wt% primary antioxidants 1010,0.1wt% auxiliary anti-oxidants 168；
0.2wt% light stabilizers 5585；
0.8wt% dispersants；And
0.8wt% black race is put into blending 3~5min, rotating speed 800rpm in high-speed mixer, then together by said mixture
It is added to melting mixing in double screw extruder, extruding pelletization, extruder temperature of each section is followed successively by：175~180 DEG C of first segment,
Remaining each section is 180~200 DEG C；The residence time of entire extrusion is 1~2min, pressure 22MPa.
1.5wt%EE-30C foaming agent master batches are added in pellet after the cooling period, foamed material is made, using twice-die-opening
The foamed material of acquisition is added in injection molding machine progress fretting map injection molding by technique, and injection temperature is 195 DEG C, discharging to get at
Product.
Embodiment 4
It weighs by weight ratio：
65wt% polypropylene includes mainly copolymer polypropylene 1 and copolymer polypropylene 2, mass ratio 3.64:1；
The mass ratio of 18wt% toughener, two kinds of toughener is 0.68:1；
15wt% micro-talcum powder；
0.1wt% primary antioxidants 1010,0.2wt% auxiliary anti-oxidants 168；
0.3wt% light stabilizers 5585；
0.8wt% dispersants；And
0.6wt% black race is put into blending 3~5min, rotating speed 800rpm in high-speed mixer, then together by said mixture
It is added to melting mixing in double screw extruder, extruding pelletization, extruder temperature of each section is followed successively by：175~180 DEG C of first segment,
Remaining each section is 180~200 DEG C；The residence time of entire extrusion is 1~2min, pressure 25MPa.
2wt%EE-30C foaming agent master batches are added in pellet after the cooling period, foamed material is made, using twice-die-opening work
The foamed material of acquisition is added to progress fretting map injection molding in injection molding machine by skill, and injection temperature is 200 DEG C, is discharged to get finished product.
Embodiment 5
It weighs by weight ratio：
61wt% polypropylene includes mainly copolymer polypropylene 1 and copolymer polypropylene 2, mass ratio 3.69:1；
The mass ratio of 19wt% toughener, two kinds of toughener is 0.73:1；
18wt% micro-talcum powder；
0.1wt% primary antioxidants 1010,0.1wt% auxiliary anti-oxidants 168；
0.2wt% light stabilizers 5585；
0.9wt% dispersants；And
0.7wt% black race is put into blending 3~5min, rotating speed 800rpm in high-speed mixer, then together by said mixture
It is added to melting mixing in double screw extruder, extruding pelletization, extruder temperature of each section is followed successively by：175~180 DEG C of first segment,
Remaining each section is 180~200 DEG C；The residence time of entire extrusion is 1~2min, pressure 28MPa.
2.5wt%EE-30C foaming agent master batches are added in pellet after the cooling period, foamed material is made, using twice-die-opening
The foamed material of acquisition is added in injection molding machine progress fretting map injection molding by technique, and injection temperature is 205 DEG C, discharging to get at
Product.
Comparative example 1
It weighs by weight ratio：
61wt% polypropylene includes mainly copolymer polypropylene 3 and copolymer polypropylene 2, mass ratio 3.69:1；
The mass ratio of 19wt% toughener, two kinds of toughener is 0.73:1；
18wt% micro-talcum powder；
0.1wt% primary antioxidants 1010,0.1wt% auxiliary anti-oxidants 168；
0.2wt% light stabilizers 5585；
0.9wt% dispersants；And
0.7wt% black race is put into blending 3~5min, rotating speed 800rpm in high-speed mixer, then together by said mixture
It is added to melting mixing in double screw extruder, extruding pelletization, extruder temperature of each section is followed successively by：175~180 DEG C of first segment,
Remaining each section is 180 DEG C~190 DEG C；The residence time of entire extrusion is 1~2min, pressure 28MPa.
2.5wt%EE-30C foaming agent master batches are added in pellet after the cooling period, foamed material is made, using twice-die-opening
The foamed material of acquisition is added in injection molding machine progress fretting map injection molding by technique, and injection temperature is 205 DEG C, discharging to get at
Product.
Comparative example 2：
It weighs by weight ratio：
61wt% polypropylene includes mainly copolymer polypropylene 1 and copolymer polypropylene 2, mass ratio 3.69:1；
The mass ratio of 19wt% toughener, two kinds of toughener is 0.73:1；
18wt% routine talcum powder；
0.1wt% primary antioxidants 1010,0.1wt% auxiliary anti-oxidants 168；
0.2wt% light stabilizers 5585；
0.9wt% dispersants；And
0.7wt% black race is put into blending 3~5min, rotating speed 800rpm in high-speed mixer, then together by said mixture
It is added to melting mixing in double screw extruder, extruding pelletization, extruder temperature of each section is followed successively by：175~180 DEG C of first segment,
Remaining each section is 180 DEG C~190 DEG C；The residence time of entire extrusion is 1~2min, pressure 28MPa.
2.5wt%EE-30C foaming agent master batches are added in pellet after the cooling period, foamed material is made, using twice-die-opening
The foamed material of acquisition is added in injection molding machine progress fretting map injection molding by technique, and injection temperature is 205 DEG C, discharging to get at
Product.
Comparative example 3：
It weighs by weight ratio：
61wt% polypropylene includes mainly copolymer polypropylene 1 and copolymer polypropylene 2, mass ratio 3.69:1；
The mass ratio of 19wt% toughener, two kinds of toughener is 0.73:1；
18wt% micro-talcum powder；
0.1wt% primary antioxidants 1010,0.1wt% auxiliary anti-oxidants 168；
0.2wt% light stabilizers 5585；
0.9wt% dispersants；And
0.7wt% black race is put into blending 3~5min, rotating speed 800rpm in high-speed mixer, then together by said mixture
It is added to melting mixing in double screw extruder, extruding pelletization, extruder temperature of each section is followed successively by：175~180 DEG C of first segment,
Remaining each section is 180 DEG C~190 DEG C；The residence time of entire extrusion is 1~2min, pressure 28MPa.
2.5wt%SA1000 foaming agents are added in pellet after the cooling period, foamed material is made, using twice-die-opening technique
The foamed material of acquisition is added to progress fretting map injection molding in injection molding machine, injection temperature is 205 DEG C, is discharged to get finished product.
Comparative example 4：
It weighs by weight ratio：
61wt% polypropylene includes mainly polypropylene 1 and polypropylene 2, mass ratio 3.69:1；
The mass ratio of 19wt% toughener, two kinds of toughener is 0.73:1；
The superfine modified blanc fixes of 18wt%；
0.1wt% primary antioxidants 1010,0.1wt% auxiliary anti-oxidants 168；
0.2wt% light stabilizers 5585；
0.9wt% dispersants；And
0.7wt% black race is put into blending 3~5min, rotating speed 800rpm in high-speed mixer, then together by said mixture
It is added to melting mixing in double screw extruder, extruding pelletization, extruder temperature of each section is followed successively by：175~180 DEG C of first segment,
Remaining each section is 180 DEG C~190 DEG C；The residence time of entire extrusion is 1~2min, pressure 28MPa.
2.5wt%EE-30C foaming agent master batches are added in pellet after the cooling period, foamed material is made, using twice-die-opening
The foamed material of acquisition is added in injection molding machine progress fretting map injection molding by technique, and injection temperature is 205 DEG C, discharging to get at
Product.
To micro foaming composite material obtained in the above embodiments and comparative example, the result being tested for the property such as table
1 and table 2 shown in.
Table 1：Micro foaming composite material embodiment performance test table
Table 2：Micro foaming composite material comparative example performance test table
Can be seen that by the comparison of embodiment 5 and comparative example 1 selects the copolymer polypropylene of high melt flow rate (MFR) that can show
Write the mobile performance for improving micro-foaming polypropylene composite material.Selection is can be seen that by the comparison of embodiment 5 and comparative example 2
Micro-talcum powder enables to micro-foaming polypropylene composite material foaming aperture more dense uniform.Pass through embodiment 5 and comparison
It is poor that the comparison of example 3 can be seen that AC foaming agent foam effects, and thermal equilibrium type foaming agent foam effect is good.By embodiment 5 with
The comparison of comparative example 4 can be seen that unique lamellar structure that micro-talcum powder has and make it have good enhancing effect.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Illustrative description is carried out to patent of the present invention above, it is clear that the realization of patent of the present invention is not by aforesaid way
Limitation, as long as use patent of the present invention methodology and technical solution carry out various improvement, or it is not improved will this
The design of patent of invention and technical solution directly apply to other occasions, are within the scope of the invention.
Claims (10)
1. a kind of automobile-used micro-foaming polypropylene composite material, which is characterized in that there is following raw materials according to be prepared by weight percentage：
The polypropylene includes the first copolymer polypropylene and the second copolymer polypropylene, and first copolymer polypropylene is high fluidity
Copolymer polypropylene, second copolymer polypropylene be high-impact copolymer polypropylene.
2. a kind of automobile-used micro-foaming polypropylene composite material according to claim 1, which is characterized in that first copolymerization
For polypropylene under 230 DEG C, the test condition of 2.16kg, melt flow rate (MFR) is 60~250g/10min, and second copolymerization is poly-
For propylene under conditions of pendulum energy 2.75J, v-notch depth are 2mm, Izod notched impact strength is more than 40KJ/m2。
3. a kind of automobile-used micro-foaming polypropylene composite material according to claim 2, which is characterized in that second copolymerization
Polypropylene, required rubber content are more than 15wt%, under 230 DEG C, the test condition of 2.16kg, melt flow rate (MFR) is 0.5~
30g/10min。
4. a kind of automobile-used micro-foaming polypropylene composite material according to claim 2, which is characterized in that first copolymerization
The weight ratio of polypropylene and second copolymer polypropylene is 1:0.15~0.46.
5. a kind of automobile-used micro-foaming polypropylene composite material according to claim 1, which is characterized in that the toughener packet
The first ethylene-octene copolymer and the second ethylene-octene copolymer are included, the toughener is in 190 DEG C, the test condition of 2.16kg
Under, melt flow rate (MFR) is 3~40g/10min.
6. a kind of automobile-used micro-foaming polypropylene composite material according to claim 1, which is characterized in that the talcum powder is
Micro-talcum powder of the surface by silanes, aluminate or titante coupling agent processing.
7. a kind of automobile-used micro-foaming polypropylene composite material according to claim 6, which is characterized in that the talcum powder
Diameter be 1~3 μm, purity ＞ 99% and be free of carbonate components.
8. a kind of automobile-used micro-foaming polypropylene composite material according to claim 5, which is characterized in that first second
For alkene-octene copolymer under 190 DEG C, the test condition of 2.16kg, melt flow rate (MFR) is 10~30g/10min, described second
Ethylene-octene copolymer has more excellent elongation at break.
9. a kind of automobile-used micro-foaming polypropylene composite material according to claim 1, which is characterized in that the foaming master batch
For thermal equilibrium type foaming agent.
10. a kind of preparation method of the automobile-used micro-foaming polypropylene composite material of 1 to 7 any one of them of the claims,
It is characterized in that, includes the following steps：
A. polypropylene, toughener, talcum powder, antioxidant, light stabilizer and other additives are set according to the weight percentage of raw materials
Dry-mixed 3~5min in mixing machine；
B. semi-finished product obtained by step a are placed in melting mixing in double screw extruder, extruding pelletization, wherein each section of the extruder
Temperature is followed successively by：175~180 DEG C of first segment, remaining each section is 180~200 DEG C；
C. by after semi-finished product cooling obtained by step b, foaming master batch according to the weight percentage of raw materials is added, foamed material is made；
D. twice-die-opening technique is used, foamed material described in step c is added to progress fretting map injection molding in injection molding machine, injection molding temperature
Degree is 185~205 DEG C, is discharged to get finished product.
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| CN111925585A (en) * | 2020-08-28 | 2020-11-13 | 辽宁鑫达滑石集团有限公司 | Talcum powder filled foaming master batch and preparation method thereof |
| CN112080076A (en) * | 2020-09-29 | 2020-12-15 | 重庆长安汽车股份有限公司 | Low-odor and low-VOC (volatile organic compound) microporous foaming modified polypropylene material and preparation method thereof |
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| CN112300490A (en) * | 2020-11-06 | 2021-02-02 | 广东金发科技有限公司 | Micro-foaming polypropylene composite material and preparation method and application thereof |
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| CN114773722A (en) * | 2022-03-18 | 2022-07-22 | 江苏金发科技新材料有限公司 | Polypropylene material and preparation method and application thereof |
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| CN114773722A (en) * | 2022-03-18 | 2022-07-22 | 江苏金发科技新材料有限公司 | Polypropylene material and preparation method and application thereof |
| CN114773722B (en) * | 2022-03-18 | 2023-08-29 | 江苏金发科技新材料有限公司 | Polypropylene material and preparation method and application thereof |
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Application publication date: 20180814 |