CN102532672A - High impact rotational-molding splash guard for automobiles - Google Patents
High impact rotational-molding splash guard for automobiles Download PDFInfo
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- CN102532672A CN102532672A CN2010106046566A CN201010604656A CN102532672A CN 102532672 A CN102532672 A CN 102532672A CN 2010106046566 A CN2010106046566 A CN 2010106046566A CN 201010604656 A CN201010604656 A CN 201010604656A CN 102532672 A CN102532672 A CN 102532672A
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- density polyethylene
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Abstract
A high impact rotational-molding splash guard for automobiles belongs to the field of chemical engineering and relates to materials of automobile splash guards. The high impact rotational-molding splash guard for the automobiles aims at solving the problem of durability of the automobile splash guards during long-period use by changing materials of the splash guard. According to part by weight, materials required by urea box master batch preparation include linear low-density polyethylene, high-density polyethylene, ethylene vinyl acetate copolymer (EVA), calcium stearate, antioxygen1010, antioxygen168, ultraviolet absorber and antistatic agent which adopts hydroxyethyl alkyl amine. According to part by weight, materials required by urea box preparation include master batches and linear low-density polyethylene. The high impact rotational-molding splash guard can adapt to high temperature and low temperature working environments, works at temperatures of -40-80 DEG C for a long period, is advanced in formula and strong in popularization capability, and solves the problem of poor environmental stress resistance of the materials. The materials of the high impact rotational-molding splash guard meet technological requirements of rotational-molding processing, and the automobile splash guard manufactured by the materials is prolonged by 30% in service life and is suitable for use environments of high temperature and severe cold areas. In addition, the manufacture method of the high impact rotational-molding splash guard is simple and easy to operate and convenient for massive production.
Description
Technical field
The invention belongs to chemical field, relate to the material of fender.
Background technology
What the fender material adopted at present is linear low density polyethylene, and this kind material can not adapt to the conditional request of the moulding and the use of splash pan.The resisting environmental stress and cracking that polythene material exists and the problem of poor impact resistance, this is ubiquitous problem; The anti-long-term aging property of unmodified single linear low density polyethylene is poor, and it is poorer in life-time service, to understand the ability that jaundice occurs even atomizing phenomenon, particularly UV resistant occur; Particularly in the running car, the muddy water environment of contact is abominable, and acid-alkali medium wherein is serious to the splash pan corrosive; The fusing point of linear polyethylene is low, to the characteristics requirement of the moulding of its rotational moulding, also is difficulty very to its modification, is difficult to be controlled at the fusing point of different materials the same with poly fusing point, otherwise just can not solve the problem of its difficult forming.
Summary of the invention
The automobile of endurance issues of life-time service that the objective of the invention is to have solved fender through the material that changes splash pan is with high-impact rotational moulding splash pan.
The weight part that the present invention makes urea box masterbatch material requested consists of:
Linear low density polyethylene 30 high density polyethylene(HDPE)s 20
EVA 50 calcium stearates 1～2 antioxidant 1010 1～3
Oxidation inhibitor 168 3～5 UV light absorbers------UV-531 2～3 static inhibitor-----hydroxyethyl alkylamine 2-6;
The weight part of making the urea box material requested consists of:
Masterbatch 8～10 linear low density polyethylenes 90～92.
HS of the present invention, anti-long-term aging, adapt to high temperature and low temperature environment, the preparation method is simple.HS has used base-material to be linear low density polyethylene, high density polyethylene(HDPE) and EVA, and particularly three kinds of material complementations have improved its intensity.Anti-long-term aging property based on the shortcoming of original base-material to long-term aging property difference, has added oxidation inhibitor therein, makes the long-term aging property of its anti-environment and illumination property good, and this material was at 1000 hours, and no abnormality seen changes under 80 ℃ of conditions.Adapt to high cryogenic Working environment, the long term operation temperature is at-40～80 ℃.Prescription is advanced, and generalization is strong, has solved the problem of the environmental stress resistance difference of material.Material of the present invention satisfies the requirement of rotational moulding complete processing, and prolong 30% the work-ing life that is made into fender, be applicable to high temperature and severe cold area environment for use, and preparation method of the present invention is simple, is easy to produce in batches.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
The weight part that the present invention makes urea box masterbatch material requested consists of:
Linear low density polyethylene 30 high density polyethylene(HDPE)s 20
EVA 50 calcium stearates 1～2 antioxidant 1010 1～3
Oxidation inhibitor 168 3～5 UV light absorbers-------UV-531 2～3
Static inhibitor-----hydroxyethyl alkylamine 2-6;
The weight part of making the urea box material requested consists of:
Masterbatch 8～10 linear low density polyethylenes 90～92.Masterbatch and linear low density polyethylene have been avoided all granulations again in twin screw extruder of all material by this mixed, cause the unnecessary degraded of material.
The present invention carries out weighing by proportioning respectively to linear low density polyethylene, high density polyethylene(HDPE), EVA, calcium stearate, antioxidant 1010, oxidation inhibitor 168, UV light absorber and static inhibitor etc.; After weighing is intact; Putting into mixer to linear low density polyethylene, high density polyethylene(HDPE), EVA, calcium stearate, antioxidant 1010, oxidation inhibitor 168, UV light absorber and static inhibitor carries out mixing in 15～20 minutes; Static inhibitor adopts the hydroxyethyl alkylamine, and UV light absorber adopts UV-531; After having mixed, mixed material through twin screw extruder extrude, granulation processes masterbatch; Before the splash pan moulding, masterbatch in proportion with linear low density polyethylene after mixer mixes, it is subsequent use to grind to form 30～40 purpose powder through shredder.
The performance of the masterbatch of developing: melting index 30g/10min, density 0.919g/cm
3, HD hardness 46, cantilever beam impact strength 0.35kJ/m, tensile strength 13MPa, elongation at break 1300%.
Process of the test: masterbatch is beaten each five groups of GB test battens through injection moulding machine; Measure melting index through the testing installation melt index apparatus; Utilize drainage to measure density; Shore durometer is measured HD hardness, utilizes pendulum hammer to measure shock strength, utilizes universal testing machine to measure tensile strength and elongation at break.
Can add the performance of goods in addition: utilize ageing oven to measure 90 ℃ in urea box goods (perhaps material), do not see images such as surface discolouration in 200 hours; Utilize environmental cabinet test low-temperature impact resistance-40 ℃, 5 hours, 500g steel ball, 1m impact did not see fragmentation.
Embodiment 1
The weight part that the present invention makes urea box masterbatch material requested consists of:
Linear low density polyethylene 30 high density polyethylene(HDPE)s 20
EVA 50 calcium stearates 1 antioxidant 1010 1
Oxidation inhibitor 168 3 UV light absorbers-------UV-531 2
Static inhibitor-----hydroxyethyl alkylamine 2;
The weight part of making the urea box material requested consists of:
Masterbatch 8 linear low density polyethylenes 92.Masterbatch and linear low density polyethylene have been avoided all granulations again in twin screw extruder of all material by this mixed, cause the unnecessary degraded of material.
The present invention carries out weighing by proportioning respectively to linear low density polyethylene, high density polyethylene(HDPE), EVA, calcium stearate, antioxidant 1010, oxidation inhibitor 168, UV light absorber and static inhibitor etc.; After weighing is intact; Putting into mixer to linear low density polyethylene, high density polyethylene(HDPE), EVA, calcium stearate, antioxidant 1010, oxidation inhibitor 168, UV light absorber and static inhibitor carries out mixing in 15～20 minutes; Static inhibitor adopts the hydroxyethyl alkylamine, and UV light absorber adopts UV-531; After having mixed, mixed material through twin screw extruder extrude, granulation processes masterbatch; Before the splash pan moulding, masterbatch in proportion with linear low density polyethylene after mixer mixes, it is subsequent use to grind to form 30～40 purpose powder through shredder.
Embodiment 2
The weight part that the present invention makes urea box masterbatch material requested consists of:
Linear low density polyethylene 30 high density polyethylene(HDPE)s 20
EVA 50 calcium stearates 1 antioxidant 1010 1
Oxidation inhibitor 168 3 UV light absorbers-------UV-531 2
Static inhibitor-----hydroxyethyl alkylamine 2;
The weight part of making the urea box material requested consists of:
Masterbatch 9 linear low density polyethylenes 91.Masterbatch and linear low density polyethylene have been avoided all granulations again in twin screw extruder of all material by this mixed, cause the unnecessary degraded of material.
Working method is identical with embodiment 1.
Embodiment 3
The weight part that the present invention makes urea box masterbatch material requested consists of:
Linear low density polyethylene 30 high density polyethylene(HDPE)s 20
EVA 50 calcium stearates 1 antioxidant 1010 1
Oxidation inhibitor 168 3 UV light absorbers-------UV-531 2
Static inhibitor-----hydroxyethyl alkylamine 2;
The weight part of making the urea box material requested consists of:
Masterbatch 10 linear low density polyethylenes 90.Masterbatch and linear low density polyethylene have been avoided all granulations again in twin screw extruder of all material by this mixed, cause the unnecessary degraded of material.
Working method is identical with embodiment 1.
Embodiment 4
The weight part that the present invention makes urea box masterbatch material requested consists of:
Linear low density polyethylene 30 high density polyethylene(HDPE)s 20
EVA 50 calcium stearates 1.5 antioxidant 1010s 2
Oxidation inhibitor 168 4 UV light absorbers-------UV-531 2.5
Static inhibitor-----hydroxyethyl alkylamine 4;
The weight part of making the urea box material requested consists of:
Masterbatch 8 linear low density polyethylenes 92.Masterbatch and linear low density polyethylene have been avoided all granulations again in twin screw extruder of all material by this mixed, cause the unnecessary degraded of material.
Working method is identical with embodiment 1.
Embodiment 5
The weight part that the present invention makes urea box masterbatch material requested consists of:
Linear low density polyethylene 30 high density polyethylene(HDPE)s 20
EVA 50 calcium stearates 1.5 antioxidant 1010s 2
Oxidation inhibitor 168 4 UV light absorbers-------UV-531 2.5
Static inhibitor-----hydroxyethyl alkylamine 4;
The weight part of making the urea box material requested consists of:
Masterbatch 9 linear low density polyethylenes 91.Masterbatch and linear low density polyethylene have been avoided all granulations again in twin screw extruder of all material by this mixed, cause the unnecessary degraded of material.
Working method is identical with embodiment 1.
Embodiment 6
The weight part that the present invention makes urea box masterbatch material requested consists of:
Linear low density polyethylene 30 high density polyethylene(HDPE)s 20
EVA 50 calcium stearates 1.5 antioxidant 1010s 2
Oxidation inhibitor 168 4 UV light absorbers-------UV-531 2.5
Static inhibitor-----hydroxyethyl alkylamine 4;
The weight part of making the urea box material requested consists of:
Masterbatch 10 linear low density polyethylenes 90.Masterbatch and linear low density polyethylene have been avoided all granulations again in twin screw extruder of all material by this mixed, cause the unnecessary degraded of material.
Working method is identical with embodiment 1.
Embodiment 7
The weight part that the present invention makes urea box masterbatch material requested consists of:
Linear low density polyethylene 30 high density polyethylene(HDPE)s 20
EVA 50 calcium stearates 2 antioxidant 1010s 3
Oxidation inhibitor 168 5 UV light absorbers-------UV-531 3
Static inhibitor-----hydroxyethyl alkylamine 6;
The weight part of making the urea box material requested consists of:
Masterbatch 8 linear low density polyethylenes 92.Masterbatch and linear low density polyethylene have been avoided all granulations again in twin screw extruder of all material by this mixed, cause the unnecessary degraded of material.
Working method is identical with embodiment 1.
Embodiment 8
The weight part that the present invention makes urea box masterbatch material requested consists of:
Linear low density polyethylene 30 high density polyethylene(HDPE)s 20
EVA 50 calcium stearates 2 antioxidant 1010s 3
Oxidation inhibitor 168 5 UV light absorbers-------UV-531 3
Static inhibitor-----hydroxyethyl alkylamine 6;
The weight part of making the urea box material requested consists of:
Masterbatch 9 linear low density polyethylenes 91.Masterbatch and linear low density polyethylene have been avoided all granulations again in twin screw extruder of all material by this mixed, cause the unnecessary degraded of material.
Working method is identical with embodiment 1.
Embodiment 9
The weight part that the present invention makes urea box masterbatch material requested consists of:
Linear low density polyethylene 30 high density polyethylene(HDPE)s 20
EVA 50 calcium stearates 2 antioxidant 1010s 3
Oxidation inhibitor 168 5 UV light absorbers-------UV-531 3
Static inhibitor-----hydroxyethyl alkylamine 6;
The weight part of making the urea box material requested consists of:
Masterbatch 10 linear low density polyethylenes 90.Masterbatch and linear low density polyethylene have been avoided all granulations again in twin screw extruder of all material by this mixed, cause the unnecessary degraded of material.
Working method is identical with embodiment 1.
The process of the test of splash pan material
Masterbatch test-results: see table 1
Table 1
| Sequence number | Project | Technical requirements | TP |
| 1 | Density (g/ ㎝ 3） | 0.91～0.93 | 1.1 |
| 2 | Tensile strength (MPa) | 15～17 | 1.2 |
| 3 | Elongation at break (%) | 900～100 | 1.2 |
| 4 | Modulus in flexure (MPa) | 500～560 | 1.3 |
| 5 | Simple beam notched Izod impact strength (kJ/m 2） | 13～15 | 1.4 |
| 6 | Vicat softening temperature (℃) | Do not survey | 1.5 |
| 7 | Shao Er D hardness | 45～50 | 1.6 |
Masterbatch: pure LLDPE sees table 2 by the mixed material property of 1:9
Table 2
| Sequence number | Project | Technical requirements | TP |
| 1 | Density (g/ ㎝ 3） | 0.91～0.92 | 1.1 |
| 2 | Tensile strength (MPa) | 14～16 | 1.2 |
| 3 | Elongation at break (%) | 600～660 | 1.2 |
| 4 | Modulus in flexure (MPa) | 500～520 | 1.3 |
| 5 | Simple beam notched Izod impact strength (kJ/m 2） | 16～18 | 1.4 |
| 6 | Vicat softening temperature (℃) | 68～70 | 1.5 |
| 7 | Shao Er D hardness | 50～55 | 1.6 |
Table 3 is seen in development test
Table 3
| Sequence number | Project | Technical requirements | TP |
| 1 | Heat-resistant aging | Unusual phenomenoies such as no be full of cracks, distortion, variable color, cracking | 2.1 |
| 2 | Cold-resistant hot alternation property | There are not unusual phenomenoies such as distortion, variable color, cracking | 2.2 |
| 3 | Low-temperature impact resistance | Do not break, unusual phenomenon such as cracking | 2.3 |
| 4 | Weathering resistance | Gray scale 4-5 level does not have unusual phenomenoies such as distortion, variable color, cracking | 2.4 |
| 5 | Resistant to chemical media property | Unusual phenomenoies such as no dissolving, expansion, variable color, crackle | 2.5 |
TP:
The testing of materials (
Table
1
With table 2)
1.1 density
Regulation by GB/T 1033.1-2008 makes an experiment.
1.2 tensile strength and elongation at break
Regulation by GB/T 1040.2-2006 makes an experiment, and adopts I type sample, and trial speed is 50 mm/min ± 5 mm/min.
1.3 modulus in flexure
Regulation by GB/T 9341-2008 makes an experiment, and specimen size is long 80 mm ± 2 mm, wide 10 mm ± 0.2 mm, and thick 4 mm ± 0.2 mm, the test span is 16 ± 1 times of sample thickness, trial speed is 2.0 mm/min ± 0.2 mm/min.
1.4 simple beam notched Izod impact strength
Regulation by GB/T 1043.1-2008 makes an experiment, and adopts 2 type samples, C type breach.
1.5 vicat softening temperature
Regulation by GB/T 1633-2000 makes an experiment.
1.6 Shao Er hardness
Regulation by GB/T 2411-2008 makes an experiment.
Development test (table 3)
2.1 heat-resistant aging
Test sample is simulated after the real vehicle state installs, be placed on temperature and be 168 h in 80 ℃ ± 2 ℃ the thermostat container, take out back range estimation sample cosmetic variation situation.
2.2 cold-resistant hot alternation property
Test sample is simulated after the real vehicle state installs; Put into high-low temperature test chamber; Carry out the test of four round-robin by following condition :-40 ℃ * 4 h → RT * 1 h → 90 ℃ * 6 h → RT * 1 h is a loop cycle, and take out the test back, range estimation sample cosmetic variation situation.
2.3 low-temperature impact resistance
Test sample is simulated after the real vehicle state installs, put into-40 ℃ ± 2 ℃ cryostat 4 h, after the freezing treatment, take out sample, use 500 g steel balls immediately, apart from sample 800 mm height, impact the central part of splash pan, range estimation sample cosmetic variation situation.
2.4 weathering resistance
Test sample is cut three on the sample of 100 mm * 65 mm * thickness of sample; Put into and be similar to Ci3000 type xenon lamp weathering age case, carry out 1000 h test by the regulation of GB/T 16422.2-1999, blackboard temperature is 63 ℃ ± 3 ℃; Relative humidity 50% ± 5%; Spray water in the test, loop cycle is water spray 5 min 25 min that do not spray water, and relative humidity is meant that humidity when spraying water does not reach the relative humidity after stable.The grey scale that sample is pressed regulation evaluation sample in the GB 250-1995 standard is taken out in the test back, and range estimation sample cosmetic variation situation.
2.5 resistant to chemical media property
On test sample, cut one on the sample of 80mm * 20mm * thickness of sample; Half immerses in the following chemical mediator of stipulating places 0.5 h; Drain after the taking-up, clean the chemical mediator on the sample, range estimation sample cosmetic variation situation with the clean rag that soaked water or gasoline.
Chemical mediator: engine motor oil, vehicle fuel, lubricating oil (fat), motor vehicle clean-out system commonly used and protective material are like 5% soap soln, paint clean-out system, industrial dedust agent, paint sanitas.
Claims (1)
1. an automobile is characterized in that with high-impact rotational moulding splash pan:
The weight part of making urea box masterbatch material requested consists of:
Linear low density polyethylene 30 high density polyethylene(HDPE)s 20
EVA 50 calcium stearates 1～2 antioxidant 1010 1～3
Oxidation inhibitor 168 3～5 UV light absorbers------UV-531 2～3 static inhibitor-----hydroxyethyl alkylamine 2-6;
The weight part of making the urea box material requested consists of:
Masterbatch 8～10 linear low density polyethylenes 90～92.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106046566A CN102532672A (en) | 2010-12-24 | 2010-12-24 | High impact rotational-molding splash guard for automobiles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106046566A CN102532672A (en) | 2010-12-24 | 2010-12-24 | High impact rotational-molding splash guard for automobiles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102532672A true CN102532672A (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106046566A Pending CN102532672A (en) | 2010-12-24 | 2010-12-24 | High impact rotational-molding splash guard for automobiles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102532672A (en) |
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2010
- 2010-12-24 CN CN2010106046566A patent/CN102532672A/en active Pending
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Application publication date: 20120704 |