CN108070158A - A kind of PP composite material of low post-shrinkage ratio and preparation method thereof - Google Patents
A kind of PP composite material of low post-shrinkage ratio and preparation method thereof Download PDFInfo
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- CN108070158A CN108070158A CN201611028561.8A CN201611028561A CN108070158A CN 108070158 A CN108070158 A CN 108070158A CN 201611028561 A CN201611028561 A CN 201611028561A CN 108070158 A CN108070158 A CN 108070158A
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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
- C08L23/14—Copolymers of propene
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- 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
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- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92514—Pressure
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- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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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- 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
- C08L2205/24—Crystallisation aids
Abstract
The present invention discloses a kind of PP composite material of low post-shrinkage ratio and preparation method thereof, is prepared by polypropylene, polypropylene wax, glass microballoon, superfine talcum powder, toughener, nucleating agent, lubricant, coupling agent and antioxidant through substep mixing, extrusion.Polypropylene wax influences the crystal property of PP so as to reduce PP composite material shrinking percentages；And glass microballoon is passed through into master, side spout while feeding manner and the compounding use with superfine talcum powder, calcium carbonate powder is evenly affixed to glass microballoon and PP surfaces, form specific cage structure, greatly enhance the mechanical property between composition, the PP composite materials of excellent combination property are finally obtained, shrinking percentage substantially reduces.
Description
Technical field
The present invention relates to field of high polymer material modification more particularly to a kind of polypropylene composite materials materials of low post-shrinkage ratio
Material and preparation method thereof.
Background technology
Polypropylene (PP) is easily processed into type and its with density is low, resistant to chemical etching and itself is excellent due to cheap
It the advantages that different physical and mechanical property, is widely used general, becomes one of general plastic with fastest developing speed.But poly- third
Alkene is after formed product, and due to the change of the conditions such as temperature, pressure, molecule can rearrange, different so as to cause polypropylene
The contraction of degree, i.e. after-contraction.Bumper can be prepared by polypropylene.It is for bumper, it is necessary to higher
Dimensional stability, i.e., small in the contraction that is molded material after 24~48h and material also should after the aftertreatment technologies such as being sprayed, being coated
Keep smaller after-contraction.Therefore, polypropylene is badly in need of reducing polyacrylic post-shrinkage ratio by modified, can further improve
Performance widens application field.
The content of the invention
It is an object of the invention to provide a kind of PP composite materials of low post-shrinkage ratio and preparation method thereof, make poly- third
Alkene has better mechanical property, preferable low post-shrinkage ratio.
The purpose of the present invention is what is be achieved through the following technical solutions：
A kind of PP composite material of low post-shrinkage ratio, is made by weight of following components：
Further, the polypropylene is at least two copolymer polypropylene compounding uses；The polypropylene wax 220 DEG C/
Melt index under the conditions of 10kg is not less than 20g/10min.
Further, the toughener is ethylene-octene copolymer, methyl methacrylate-butadiene-styrene ternary
Copolymer and styrene-ethylene-butadiene-styrene copolymer three's compounding use.
Further, moisture weight content≤0.1% of the glass microballoon, oil absorption≤25g/100g.
Further, the feeding manner of the glass microballoon is carried out at the same time by main feeding and side feeding, and main feeding is fed
The mass ratio of amount and side feeding inlet amount is 3:2.
Further, the grain size of the superfine talcum powder is 3000~4000 mesh；The nucleating agent is nucleated for metal carboxylate
Agent.
Further, the lubricant compounds to be formed for zinc stearate, ethylene bis stearic acid amide and white oil 36# three,
The coupling agent is gamma-aminopropyl-triethoxy-silane KH550, and the antioxidant is four [β-(3,5- di-t-butyl -4- hydroxyls
Phenyl) propionic acid] pentaerythritol ester and three [2,4- di-tert-butyl-phenyls] phosphite ester compounding uses.
A kind of preparation method of the PP composite material of post-shrinkage ratio, comprises the following steps：
(1) 15~45 parts of glass microballoons are weighed in high-speed mixer A, are subsequently added into 0.2-0.4 parts of mix lubricants 20
Obtain mixture A within~30 minutes；Take out mixture A gross masses 2/5 is spare；Then 10~35 parts of superfine talcum powders are added at a high speed
Continue mixing in mixer A and obtain mixture B in 20~30 minutes；
(2) 100 parts of polypropylene, 15~30 parts of polypropylene waxes, 25~45 parts of toughener are weighed in high-speed mixer B, are connect
It and adds in 0.25~0.5 portion of nucleating agent, 0.2~0.3 part of coupling agent mixes 20~30 minutes to obtain mixture C；
(3) the mixture B in step (1) is added in high-speed mixer B, adds 0.15~0.4 part of antioxidant
Mixing 20~30 minutes；Be eventually adding 0.2-0.4 parts of lubricants continue mixing 20~30 minutes mixture D；
(4) mixture D is added in double screw extruder, at the same the 2/5 mixture A additions taken out in step (1) is double
The side spout of screw extruder is granulated through wire drawing, cools down, filling and wrap to obtain PP composite material.
Further, 200~300 revs/min of the rotating speed of the high-speed mixer A, 50~70 DEG C of temperature；High-speed mixer
200~300 revs/min of the rotating speed of B, 50~70 DEG C of temperature；The temperature of double screw extruder is followed successively by 170 from feeding section to head
DEG C, 195 DEG C, 215 DEG C, 220 DEG C, 220 DEG C, 225 DEG C, 225 DEG C, 215 DEG C, 215 DEG C, 210 DEG C, screw diameter be 75 ㎜, screw rod
Draw ratio is 44.
Further, the lubricant added in step (1) is zinc stearate and ethylene bis stearic acid amide mixture, step
(3) lubricant added in is white oil 36#.
The present invention has the following technical effect that：
1. the present invention by add in glass microballoon master, side feeding simultaneously feed and it is multiple with superfine talcum powder, polypropylene wax
With use, the PP composite materials of excellent combination property are obtained, while the shrinking percentage of PP composite materials is greatly reduced.
2. present invention defines glass microballoon moisture≤0.1%, oil absorptions≤25g/100g.This extraordinary glass is micro-
The addition of pearl cause composite material processing when, melting mixing is uniform, be not in head block, tie rod broken strip the problems such as, system
Standby obtained composite material shrinking percentage and other mechanical properties are optimal.
3. the present invention is by adding in nucleating agent PP composite materials good stability of the dimension and spray after 24~48h is molded
Smaller after-contraction is kept after painting.
4. the present invention influences the crystal property of PP so as to reduce PP composite materials by adding in suitable toughener in PP
Shrinking percentage.
5. present invention process is simple, is easily produced in enormous quantities.
Specific embodiment
With reference to some embodiments, the invention will be further described with comparative example.Following embodiment is the present invention
Typical case, protection scope of the present invention are not limited thereto.
Melt index is performed according to ASTM D1238-10, is tested under the conditions of 230 DEG C/2.16kg；Tensile property according to
ASTM D638-10 are performed, test speed 50mm/min；Chalpy impact performance is performed according to ASTM D256-10；Density is pressed
It is performed according to ASTM D792-13；Material shrinking percentage according to ASTM D955-08 execution, (i.e. surveyed afterwards for 24 hours by Injection moulded part cooling
Examination).Spraying after-contraction performs according to ASTM D955-08 and (carries out spraying post processing, spraying post processing afterwards for 24 hours in injection cooling
It is tested afterwards for 24 hours.Note：Spraying conditions are 85 DEG C, 40min).All of above test environment is：23 DEG C, 50%RH.
The main raw material(s) used in embodiment and comparative example is as follows：
Embodiment 1
The first step：15 parts of glass microballoons are weighed in high-speed mixer A, be subsequently added into 0.08 part of lubricant stearic acid zinc and
0.12 part of lubricant ethylene bis stearic acid amide mixes 20 minutes to obtain mixture A, and takes out the 2/5 spare of mixture A total weights；
Mixture B is mixed 20 minutes to obtain in high-speed mixer A followed by 10 part of 8000 mesh superfine talcum powder is weighed.High mixer A's turns
200 revs/min of speed, temperature 50 C.
Second step：Weigh 60 parts of polypropylene BX3900,40 parts of polypropylene EP5077,15 parts of polypropylene waxes, 15 parts of toughener
POE 8150,7 parts of toughener EM-500A, 3 parts of toughener SEBS G1652 in high-speed mixer B, be subsequently added into 0.25 part into
Core agent HPN-20E, 0.2 part of coupling agent KH550 mix 20 minutes to obtain mixture C.200 revs/min of the rotating speed of high mixer B, temperature
50℃。
3rd step：Mixture B is added in high-speed mixer B, adds 0.06 part of antioxidant 1010,0.09 part of antioxygen
Agent 168 mixes 20 minutes；It is eventually adding 0.2 part of white oil 36# and mixes 20 minutes to obtain mixture D.200 revs/min of the rotating speed of high mixer B
Clock, temperature 50 C.
4th step：Mixture D is added in double screw extruder, while the 2/5 mixture A taken out in the first step is always added
Enter the side spout of double screw extruder, be then granulated, cool down through wire drawing, filling bag.The temperature of double screw extruder is from feeding section
170 DEG C, 195 DEG C, 215 DEG C, 220 DEG C, 220 DEG C, 225 DEG C, 225 DEG C, 215 DEG C, 215 DEG C, 210 DEG C are followed successively by head.Screw rod
A diameter of 75 millimeters, screw slenderness ratio 44.
Embodiment 2
The first step：45 parts of glass microballoons are weighed in high-speed mixer A, be subsequently added into 0.21 part of lubricant stearic acid zinc and
0.19 part of lubricant ethylene bis stearic acid amide mixes 30 minutes to obtain mixture A, and takes out the 2/5 spare of mixture A total weights；
Mixture B is mixed 30 minutes to obtain in high-speed mixer A followed by 35 part of 8000 mesh superfine talcum powder is weighed.High mixer A's turns
300 revs/min of speed, temperature 70 C.
Second step：Weigh 58 parts of polypropylene BX3920,42 parts of polypropylene EP5077,30 parts of polypropylene waxes, 30 parts of toughener
POE 8150,10 parts of toughener EM-500A, 5 parts of toughener SEBS G1652 in high-speed mixer B, be subsequently added into 0.5 part into
Core agent HPN-20E, 0.3 part of coupling agent KH550 mix 30 minutes to obtain mixture C.300 revs/min of the rotating speed of high mixer B, temperature
70℃。
3rd step：Mixture B is added in high-speed mixer B, adds 0.22 part of antioxidant 1010,0.18 part of antioxygen
Agent 168 mixes 30 minutes.It is eventually adding 0.4 part of white oil 36# and mixes 30 minutes to obtain mixture D.300 revs/min of the rotating speed of high mixer B
Clock, temperature 70 C.
4th step：Mixture D is added in double screw extruder, while the 2/5 mixture A taken out in the first step is always added
Enter the side spout of double screw extruder, be then granulated, cool down through wire drawing, filling bag.The temperature of double screw extruder is from feeding section
170 DEG C, 195 DEG C, 215 DEG C, 220 DEG C, 220 DEG C, 225 DEG C, 225 DEG C, 215 DEG C, 215 DEG C, 210 DEG C are followed successively by head.Screw rod
A diameter of 75 millimeters, screw slenderness ratio 44.
Embodiment 3
The first step：21 parts of glass microballoons are weighed in high-speed mixer A, be subsequently added into 0.09 part of lubricant stearic acid zinc and
0.17 part of lubricant ethylene bis stearic acid amide mixes 23 minutes to obtain mixture A, and takes out the 2/5 spare of mixture A total weights；
Mixture B is mixed 27 minutes to obtain in high-speed mixer A followed by 12 part of 8000 mesh superfine talcum powder is weighed.High mixer A's turns
234 revs/min of speed, 57 DEG C of temperature.
Second step：Weigh 43 parts of polypropylene K7760H, 57 parts of polypropylene EP5077,19 parts of polypropylene waxes, 19 parts of toughener
POE 8150,7 parts of toughener EM-500A, 5 parts of toughener SEBS G1652 in high-speed mixer B, be subsequently added into 0.29 part into
Core agent HPN-20E, 0.24 part of coupling agent KH550 mix 24 minutes to obtain mixture C.209 revs/min of the rotating speed of high mixer B, temperature
59℃。
3rd step：Mixture B is added in high-speed mixer B, adds 0.16 part of antioxidant 1010,0.19 part of antioxygen
Agent 168 mixes 22 minutes.It is eventually adding 0.26 part of white oil 36# and mixes 21 minutes to obtain mixture D.262 turns of the rotating speed of high mixer B/
Minute, 62 DEG C of temperature.
4th step：Mixture D is added in double screw extruder, while the 2/5 mixture A taken out in the first step is always added
Enter the side spout of double screw extruder, be then granulated, cool down through wire drawing, filling bag.The temperature of double screw extruder is from feeding section
170 DEG C, 195 DEG C, 215 DEG C, 220 DEG C, 220 DEG C, 225 DEG C, 225 DEG C, 215 DEG C, 215 DEG C, 210 DEG C are followed successively by head.Screw rod
A diameter of 75 millimeters, screw slenderness ratio 44.
Embodiment 4
The first step：29 parts of glass microballoons are weighed in high-speed mixer A, be subsequently added into 0.08 part of lubricant stearic acid zinc and
0.12 part of lubricant ethylene bis stearic acid amide mixes 27 minutes to obtain mixture A, and takes out the 2/5 spare of mixture A total weights；
Mixture B is mixed 22 minutes to obtain in high-speed mixer A followed by 18 part of 8000 mesh superfine talcum powder is weighed.High mixer A's turns
260 revs/min of speed, 53 DEG C of temperature.
Second step：Weigh 40 parts of polypropylene BX3900,60 parts of polypropylene EP5077,22 parts of polypropylene waxes, 14 parts of toughener
POE 8150,12 parts of toughener EM-500A, 7 parts of toughener SEBS G1652 are subsequently added into 0.37 part in high-speed mixer B
Nucleating agent HPN-20E, 0.28 part of coupling agent KH550 mix 28 minutes to obtain mixture C.287 revs/min of the rotating speed of high mixer B, temperature
59 DEG C of degree.
3rd step：Mixture B is added in high-speed mixer B, adds 0.08 part of antioxidant 1010,0.09 part of antioxygen
Agent 168 mixes 29 minutes.It is eventually adding 0.2 part of white oil 36# and mixes 20 minutes to obtain mixture D.220 revs/min of the rotating speed of high mixer B
Clock, 66 DEG C of temperature.
4th step：Mixture D is added in double screw extruder, while the 2/5 mixture A taken out in the first step is always added
Enter the side spout of double screw extruder, be then granulated, cool down through wire drawing, filling bag.The temperature of double screw extruder is from feeding section
170 DEG C, 195 DEG C, 215 DEG C, 220 DEG C, 220 DEG C, 225 DEG C, 225 DEG C, 215 DEG C, 215 DEG C, 210 DEG C are followed successively by head.Screw rod
A diameter of 75 millimeters, screw slenderness ratio 44.
Embodiment 5
The first step：32 parts of glass microballoons are weighed in high-speed mixer A, be subsequently added into 0.09 part of lubricant stearic acid zinc and
0.17 part of lubricant ethylene bis stearic acid amide mixes 21 minutes to obtain mixture A, and takes out the 2/5 spare of mixture A total weights；
Mixture B is mixed 29 minutes to obtain in high-speed mixer A followed by 21 part of 8000 mesh superfine talcum powder is weighed.High mixer A's turns
252 revs/min of speed, 67 DEG C of temperature.
Second step：Weigh 31 parts of polypropylene BX3920,69 parts of polypropylene EP5077,23 parts of polypropylene waxes, 15 parts of toughener
POE 8150,7 parts of toughener EM-500A, 4 parts of toughener SEBS G1652 in high-speed mixer B, be subsequently added into 0.33 part into
Core agent HPN-20E, 0.23 part of coupling agent KH550 mix 27 minutes to obtain mixture C.290 revs/min of the rotating speed of high mixer B, temperature
70℃。
3rd step：Mixture B is added in high-speed mixer B, adds 0.07 part of antioxidant 1010,0.09 part of antioxygen
Agent 168 mixes 27 minutes.It is eventually adding 0.26 part of white oil 36# and mixes 25 minutes to obtain mixture D.250 turns of the rotating speed of high mixer B/
Minute, temperature 60 C.
4th step：Mixture D is added in double screw extruder, while the 2/5 mixture A taken out in the first step is always added
Enter the side spout of double screw extruder, be then granulated, cool down through wire drawing, filling bag.The temperature of double screw extruder is from feeding section
170 DEG C, 195 DEG C, 215 DEG C, 220 DEG C, 220 DEG C, 225 DEG C, 225 DEG C, 215 DEG C, 215 DEG C, 210 DEG C are followed successively by head.Screw rod
A diameter of 75 millimeters, screw slenderness ratio 44.
Embodiment 6
The first step：38 parts of glass microballoons are weighed in high-speed mixer A, be subsequently added into 0.07 part of lubricant stearic acid zinc and
0.14 part of lubricant ethylene bis stearic acid amide mixes 29 minutes to obtain mixture A, and takes out the 2/5 spare of mixture A total weights；
Mixture B is mixed 25 minutes to obtain in high-speed mixer A followed by 29 part of 8000 mesh superfine talcum powder is weighed.High mixer A's turns
240 revs/min of speed, 58 DEG C of temperature.
Second step：Weigh 50 parts of polypropylene K7760H, 50 parts of polypropylene EP5077,25 parts of polypropylene waxes, 21 parts of toughener
POE 8150,9 parts of toughener EM-500A, 6 parts of toughener SEBS G1652 in high-speed mixer B, be subsequently added into 0.39 part into
Core agent HPN-20E, 0.24 part of coupling agent KH550 mix 29 minutes to obtain mixture C.290 revs/min of the rotating speed of high mixer B, temperature
67℃。
3rd step：Mixture B is added in high-speed mixer B, adds 0.06 part of antioxidant 1010,0.09 part of antioxygen
Agent 168 mixes 20 minutes.It is eventually adding 0.21 part of white oil 36# and mixes 22 minutes to obtain mixture D.260 turns of the rotating speed of high mixer B/
Minute, temperature 70 C.
4th step：Mixture D is added in double screw extruder, while the 2/5 mixture A taken out in the first step is always added
Enter the side spout of double screw extruder, be then granulated, cool down through wire drawing, filling bag.The temperature of double screw extruder is from feeding section
170 DEG C, 195 DEG C, 215 DEG C, 220 DEG C, 220 DEG C, 225 DEG C, 225 DEG C, 215 DEG C, 215 DEG C, 210 DEG C are followed successively by head.Screw rod
A diameter of 75 millimeters, screw slenderness ratio 44.
Embodiment 7
The first step：43 parts of glass microballoons are weighed in high-speed mixer A, be subsequently added into 0.08 part of lubricant stearic acid zinc and
0.18 part of lubricant ethylene bis stearic acid amide mixes 30 minutes to obtain mixture A, and takes out the 2/5 spare of mixture A total weights；
Mixture B is mixed 23 minutes to obtain in high-speed mixer A followed by 34 part of 8000 mesh superfine talcum powder is weighed.High mixer A's turns
208 revs/min of speed, 64 DEG C of temperature.
Second step：Weigh 72 parts of polypropylene BX3920,28 parts of polypropylene EP5077,29 parts of polypropylene waxes, 23 parts of toughener
POE 8150,12 parts of toughener EM-500A, 8 parts of toughener SEBS G1652 are subsequently added into 0.46 part in high-speed mixer B
Nucleating agent HPN-20E, 0.27 part of coupling agent KH550 mix 28.4 minutes to obtain mixture C.200 revs/min of the rotating speed of high mixer B,
56.3 DEG C of temperature.
3rd step：Mixture B is added in high-speed mixer B, adds 0.06 part of antioxidant 1010,0.09 part of antioxygen
Agent 168 mixes 20 minutes.It is eventually adding 0.26 part of white oil 36# and mixes 26.7 minutes to obtain mixture D.The rotating speed 289 of high mixer B
Rev/min, 52 DEG C of temperature.
4th step：Mixture D is added in double screw extruder, while the 2/5 mixture A taken out in the first step is always added
Enter the side spout of double screw extruder, be then granulated, cool down through wire drawing, filling bag.The temperature of double screw extruder is from feeding section
170 DEG C, 195 DEG C, 215 DEG C, 220 DEG C, 220 DEG C, 225 DEG C, 225 DEG C, 215 DEG C, 215 DEG C, 210 DEG C are followed successively by head.Screw rod
A diameter of 75 millimeters, screw slenderness ratio 44.
Composite material and the performance of virgin pp prepared by above-described embodiment 1-7 is shown in Table 1-1.
Table 1-1
Can be seen that the tensile strength of PP composite material that the present invention prepares from above example and table 1-1 is
Twice or so of comparative example polypropylene BX3920, Izod notched impact are more than four times of comparative example, and the present invention prepares poly-
The mechanical property of acrylic composite has obtained large increase.The material shrinking percentage for the PP composite material that the present invention prepares
It is greatly reduced with spraying post-shrinkage ratio, material shrinking percentage and spraying post-shrinkage ratio are optimal.The present invention is micro- by adding in glass
Pearl master, side feeding are fed simultaneously and with superfine talcum powder, polypropylene wax compounding use, the PP for obtaining excellent combination property is compound
Material, while the shrinking percentage of PP composite materials is greatly reduced.Glass microballoon moisture≤0.1% that the present invention uses, oil suction
Amount≤25g/100g, the addition of this extraordinary glass microballoon causes composite material, and in processing, melting mixing is uniform, is not in
The problems such as head blocks, tie rod broken strip, the composite material shrinking percentage and other mechanical properties that are prepared are optimal.Meanwhile
The present invention kept by adding in nucleating agent PP composite materials after good stability of the dimension and spraying is molded after 24~48h compared with
Small after-contraction；The addition of appropriate toughener affects the crystal property of PP, so as to reduce PP composite material shrinking percentages.So
The PP composite material excellent combination property that the present invention prepares can be used in high-end automobile using as bumper.
It is understood that the above description of the embodiments is intended to facilitate those skilled in the art and using this hair
It is bright.Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein
General Principle is applied in other embodiment without having to go through creative labor.Therefore, the invention is not restricted to implementations here
Example, those skilled in the art's announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be
Within protection scope of the present invention.
Claims (10)
1. a kind of PP composite material of low post-shrinkage ratio, it is characterised in that：It is made by weight of following components：
100 parts of polypropylene,
15 ~ 30 parts of polypropylene wax,
15 ~ 45 parts of glass microballoon,
10 ~ 35 parts of superfine talcum powder,
25 ~ 45 parts of toughener,
0.25 ~ 0.5 part of nucleating agent,
0.4 ~ 0.8 part of lubricant,
0.2 ~ 0.3 part of coupling agent,
0.15 ~ 0.4 part of antioxidant.
2. a kind of PP composite material of low post-shrinkage ratio according to claim 1, it is characterised in that：The polypropylene
For at least two copolymer polypropylene compounding use；Melt index of the polypropylene wax under the conditions of 220 DEG C/10kg is not less than
20g/10min。
3. a kind of PP composite material of low post-shrinkage ratio according to claim 1, it is characterised in that：The toughener
For ethylene-octene copolymer, methyl methacrylate-butadiene-styrene terpolymer and styrene ethylene butadiene-
Styrol copolymer three's compounding use.
4. a kind of PP composite material of low post-shrinkage ratio according to claim 1, it is characterised in that：The glass is micro-
Moisture weight content≤0.1% of pearl, oil absorption≤25g/100g.
5. a kind of PP composite material of low post-shrinkage ratio according to claim 1 or 4, it is characterised in that：The glass
The feeding manner of glass microballon is carried out at the same time by main feeding and side feeding, and the mass ratio of main feeding inlet amount and side feeding inlet amount
For 3:2.
6. a kind of PP composite material of low post-shrinkage ratio according to claim 1, it is characterised in that：The ultra-fine cunning
The grain size of mountain flour is 3000 ~ 4000 mesh；The nucleating agent is metal carboxylate nucleating agent.
7. a kind of PP composite material of low post-shrinkage ratio according to claim 1, it is characterised in that：The lubricant
It compounds and to be formed for zinc stearate, ethylene bis stearic acid amide and white oil 36# three；The coupling agent is three ethoxy of γ-aminopropyl
Base silane KH550；The antioxidant for four [β-（3,5- di-tert-butyl-hydroxy phenyls）Propionic acid] pentaerythritol ester and three [2,
4- di-tert-butyl-phenyls] phosphite ester compounding use.
8. a kind of preparation method using the PP composite material of low post-shrinkage ratio as described in claim any one of 1-7,
It is characterized in that comprising the following steps：
（1）15 ~ 45 parts of glass microballoons are weighed in high-speed mixer A, are subsequently added into 0.2-0.4 parts of 20 ~ 30 points of mix lubricants
Clock obtains mixture A；Take out mixture A gross masses 2/5 is spare；Then 10 ~ 35 parts of superfine talcum powders are added in high-speed mixer A
In continue mixing 20 ~ 30 minutes mixture B；
（2）100 parts of polypropylene, 15 ~ 30 parts of polypropylene waxes, 25 ~ 45 parts of toughener are weighed in high-speed mixer B, are subsequently added into
0.25 ~ 0.5 portion of nucleating agent, 0.2 ~ 0.3 part of coupling agent mix 20 ~ 30 minutes to obtain mixture C；
（3）By step（1）In mixture B be added in high-speed mixer B, add 0.15 ~ 0.4 part antioxidant mixing 20
~ 30 minutes；Be eventually adding 0.2-0.4 parts of lubricants continue mixing 20 ~ 30 minutes mixture D；
（4）Mixture D is added in double screw extruder, while by step（1）2/5 mixture A of middle taking-up adds in twin-screw
The side spout of extruder is granulated through wire drawing, cools down, filling and wrap to obtain PP composite material.
9. preparation method according to claim 8, it is characterised in that：200 ~ 300 turns of the rotating speed of the high-speed mixer A/
Minute, 50 ~ 70 DEG C of temperature；200 ~ 300 revs/min of the rotating speed of high-speed mixer B, 50 ~ 70 DEG C of temperature, the temperature of double screw extruder
Degree be followed successively by from feeding section to head 170 DEG C, 195 DEG C, 215 DEG C, 220 DEG C, 220 DEG C, 225 DEG C, 225 DEG C, 215 DEG C, 215 DEG C,
210 DEG C, screw diameter be 75 ㎜, screw slenderness ratio 44.
10. preparation method according to claim 8, step（1）The lubricant of middle addition is double hard for zinc stearate and ethylene
Resin acid amide blend, step（3）The lubricant of middle addition is white oil 36#.
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| CN113045819A (en) * | 2019-12-28 | 2021-06-29 | 合肥杰事杰新材料股份有限公司 | Glass microsphere filled polypropylene composition and preparation method thereof |
| CN114044968A (en) * | 2021-10-26 | 2022-02-15 | 江苏金发科技新材料有限公司 | High-melt-strength polypropylene material resistant to cyclic processing and preparation method and application thereof |
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| CN114044968A (en) * | 2021-10-26 | 2022-02-15 | 江苏金发科技新材料有限公司 | High-melt-strength polypropylene material resistant to cyclic processing and preparation method and application thereof |
| CN114044968B (en) * | 2021-10-26 | 2023-02-17 | 江苏金发科技新材料有限公司 | High-melt-strength polypropylene material resistant to cyclic processing and preparation method and application thereof |
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