CN102532646A - High-strength durable type rotational-molded automobile urea box - Google Patents
High-strength durable type rotational-molded automobile urea box Download PDFInfo
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- CN102532646A CN102532646A CN2010106046481A CN201010604648A CN102532646A CN 102532646 A CN102532646 A CN 102532646A CN 2010106046481 A CN2010106046481 A CN 2010106046481A CN 201010604648 A CN201010604648 A CN 201010604648A CN 102532646 A CN102532646 A CN 102532646A
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Abstract
The invention relates to a high-strength durable type rotational-molded automobile urea box, belongs to the field of chemical industry, and relates to a material for an automobile urea box. The invention aims at solving the durability problem of the high-strength durable type rotational-molded automobile urea box by changing the urea box material. The urea box master batch is prepared from the following materials in parts by weight: linear low-density polyethylene, high-density polyethylene, POE (Polyoxyethylene), calcium stearate, antioxidant 1010, antioxidant 168, and ethoxyl alkylamine serving as an antistatic agent. The urea box is prepared from the following materials in parts by weight: the master batch and linear low-density polyethylene. According to the invention, the rotational-molded urea box material is advanced in formula and strong in popularization property, and solves the problem that the urea box material has poor environmental stress resistance; the urea box material satisfies the rotational molding processing process requirements; the service life of the manufactured automobile urea box is prolonged by 30%, and the manufactured automobile urea box is applicable to use environments in high-temperature and cold areas; and the preparation method is simple and feasible, and easy for mass production.
Description
Technical field
The invention belongs to chemical field, relate to a kind of material of automobile urea box.
Background technology
What automobile rotational moulding urea box 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 urea box.The problem of the resisting environmental stress and cracking that polythene material exists, this is ubiquitous problem; Under 80 ℃ environment, for producing distortion and collapsing, if having under the condition of pressure, situation can be worse for a long time for single poly use temperature; The anti-long-term aging property of unmodified single linear low density polyethylene is poor, and it is poorer that the time is grown the ability that jaundice can occur even atomizing phenomenon, particularly UV resistant occur; 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 objective of the invention is through change the urea box material, thus the high-strength durable type rotational moulding automobile urea box of solution endurance issues.
The weight part that the present invention makes urea box masterbatch material requested consists of:
Linear low density polyethylene 20 high density polyethylene(HDPE)s 30
POE 50 calcium stearates 1～2 antioxidant 1010 2～3
Oxidation inhibitor 168 4～6 static inhibitor--------hydroxyethyl alkylamine 3-8;
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.Used base-material to be linear low density polyethylene, high density polyethylene(HDPE) and POE, 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 ℃.The prescription of rotational moulding urea box material of the present invention is advanced, and generalization is strong, has solved the problem of the environmental stress resistance difference of urea box material.Urea box material of the present invention satisfies the requirement of rotational moulding complete processing, and prolong 30% the work-ing life that is made into the automobile urea box, be applicable to high temperature and severe cold area environment for use, and the preparation method is simple, is easy to produce in batches.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Embodiment
The weight part that the present invention makes urea box masterbatch material requested consists of:
Linear low density polyethylene (LLDPE) 20 high density polyethylene(HDPE)s (HDPE) 30
POE 50 calcium stearates 1～2 antioxidant 1010 2～3
Oxidation inhibitor 168 4～6 static inhibitor---------hydroxyethyl alkylamine 3-8;
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.
Linear low density polyethylene, high density polyethylene(HDPE), POE, calcium stearate, antioxidant 1010, oxidation inhibitor 168, negative ion powder and static inhibitor are carried out weighing by proportioning respectively, and static inhibitor adopts the hydroxyethyl alkylamine; After weighing is intact, puts into mixer to linear low density polyethylene, high density polyethylene(HDPE), POE, calcium stearate, antioxidant 1010, oxidation inhibitor 168, negative ion powder and static inhibitor and carry out mixing in 15～20 minutes; After having mixed, mixed material through twin screw extruder extrude, granulation processes masterbatch; Before the rotational moulding urea box, 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 1
Linear low density polyethylene (LLDPE) 20 high density polyethylene(HDPE)s (HDPE) 30
POE 50 calcium stearates 1 antioxidant 1010 2
Oxidation inhibitor 168 4 static inhibitor---------hydroxyethyl alkylamine 3;
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.
Linear low density polyethylene, high density polyethylene(HDPE), POE, calcium stearate, antioxidant 1010, oxidation inhibitor 168, negative ion powder and static inhibitor are carried out weighing by proportioning respectively, and static inhibitor adopts the hydroxyethyl alkylamine; After weighing is intact, puts into mixer to linear low density polyethylene, high density polyethylene(HDPE), POE, calcium stearate, antioxidant 1010, oxidation inhibitor 168, negative ion powder and static inhibitor and carry out mixing in 15～20 minutes; After having mixed, mixed material through twin screw extruder extrude, granulation processes masterbatch; Before the rotational moulding urea box, 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
Linear low density polyethylene (LLDPE) 20 high density polyethylene(HDPE)s (HDPE) 30
POE 50 calcium stearates 1 antioxidant 1010 2
Oxidation inhibitor 168 4 static inhibitor---------hydroxyethyl alkylamine 3;
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.
The preparation method is identical with embodiment 1.
Embodiment 3
Linear low density polyethylene (LLDPE) 20 high density polyethylene(HDPE)s (HDPE) 30
POE 50 calcium stearates 1 antioxidant 1010 2
Oxidation inhibitor 168 4 static inhibitor---------hydroxyethyl alkylamine 3;
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 preparation method is identical with embodiment 1.
Embodiment 4
Linear low density polyethylene (LLDPE) 20 high density polyethylene(HDPE)s (HDPE) 30
POE 50 calcium stearates 2 antioxidant 1010s 3
Oxidation inhibitor 168 6 static inhibitor---------hydroxyethyl alkylamine 8;
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.
The preparation method is identical with embodiment 1.
Embodiment 5
Linear low density polyethylene (LLDPE) 20 high density polyethylene(HDPE)s (HDPE) 30
POE 50 calcium stearates 2 antioxidant 1010s 3
Oxidation inhibitor 168 6 static inhibitor---------hydroxyethyl alkylamine 8;
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.
The preparation method is identical with embodiment 1.
Embodiment 6
Linear low density polyethylene (LLDPE) 20 high density polyethylene(HDPE)s (HDPE) 30
POE 50 calcium stearates 2 antioxidant 1010s 3
Oxidation inhibitor 168 6 static inhibitor---------hydroxyethyl alkylamine 8;
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 preparation 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 (LLDPE) 20 high density polyethylene(HDPE)s (HDPE) 30
POE 50 calcium stearates 1.5 antioxidant 1010s 2.5
Oxidation inhibitor 168 5 static inhibitor---------hydroxyethyl alkylamine 5.5;
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 preparation 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 (LLDPE) 20 high density polyethylene(HDPE)s (HDPE) 30
POE 50 calcium stearates 1.5 antioxidant 1010s 2.5
Oxidation inhibitor 168 5 static inhibitor---------hydroxyethyl alkylamine 5.5;
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.
The preparation 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 (LLDPE) 20 high density polyethylene(HDPE)s (HDPE) 30
POE 50 calcium stearates 1.5 antioxidant 1010s 2.5
Oxidation inhibitor 168 5 static inhibitor---------hydroxyethyl alkylamine 5.5;
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.
The preparation method is identical with embodiment 1.
The performance of the masterbatch of developing: melting index 32g/10min, density 0.920g/cm
3, HD hardness 45, cantilever beam impact strength 0.40kJ/m, tensile strength 15MPa, elongation at break 1450%.
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.
The process of the test of urea box material:
The masterbatch test-results is seen table 1
Table 1
| Sequence number | Project | Unit | Technical requirements | TP |
| 1 | Density | G/cm 3 | 0.920～0.921 | 1.1 |
| 2 | Shao Er D hardness | - | 45～46 | 1.2 |
| 3 | Tensile strength | MPa | 14～15 | 1.3 |
| 4 | Elongation at break | % | 1400～1500 | 1.3 |
| 5 | The simple beam notched Izod impact strength | KJ/m 2 | 14～15 | 1.4 |
| 6 | Modulus in flexure | MPa | 600～610 | 1.5 |
| 7 | Vicat softening temperature | ℃ | Do not survey | 1.6 |
| 8 | Environmental stress cracking | h | Do not survey | 1.7 |
Masterbatch: pure LLDPE sees table 2 by the mixed material property of 1:9
Table 2
| Sequence number | Project | Unit | Technical requirements | TP |
| 1 | Density | G/cm 3 | 0.920～0.921 | 1.1 |
| 2 | Shao Er D hardness | - | 46～48 | 1.2 |
| 3 | Tensile strength | MPa | 17～18 | 1.3 |
| 4 | Elongation at break | % | 800～900 | 1.3 |
| 5 | The simple beam notched Izod impact strength | KJ/m 2 | 14～15 | 1.4 |
| 6 | Modulus in flexure | MPa | 610～620 | 1.5 |
| 7 | Vicat softening temperature | ℃ | 118～122 | 1.6 |
| 8 | Environmental stress cracking | h | 300 (not crackings) | 1.7 |
Table 3 is seen in development test
Table 3
TP:
Method of testing materials (table 1 and table 2)
1.1 density
Make an experiment by GB/T 1033.1-2008 (A method).
1.2 Shao Er D hardness
Make an experiment by GB 2411-2008.
1.3 tensile strength and elongation at break
Make an experiment by GB/T 1040.2-2006,1A type sample, trial speed is 50 mm/min ± 5 mm/min.
1.4 single beam notched Izod impact strength
Regulation by GB/T 1043.1-2008 makes an experiment, and specimen size is 1 type, long 80 mm ± 2 mm, width 4 mm ± 0.2 mm, breach residual thickness 8 mm ± 0.2 mm, and breach is an A type breach.
1.5 modulus in flexure
Regulation by GB/T 9341-2008 makes an experiment, and specimen size is 16 ± 1 times of sample thickness for long 80 mm ± 2 mm, wide 10 mm ± 0.5 mm, thickness 4 mm ± 0.2 mm, test span, and trial speed is 2.0 mm/min ± 0.4 mm/min.
1.6 vicat softening temperature
Regulation by GB/T 1633-2000 makes an experiment, and TP is A
120
1.7 environmental stress cracking
Regulation by GB/T 1842-2008 makes an experiment, test and Selection condition B, and TP is F
50
Development test (table 3)
2.1 thermotolerance
Dress liquid: in the urea box goods, add the water (room temperature) of 2/3 rated capacity, at 90 ℃ ± 2 ℃ envrionment temperature held 1 h, take out the back and observe the cosmetic variation situation, deflection is the percent value of dilation dimension and original size; Be unkitted liquid:, take out the back and observe cosmetic variation at 90 ℃ ± 2 ℃ envrionment temperature held 200 h.
2.2 winter hardiness
The urea box goods are placed 24 h in-40 ℃ ± 2 ℃ refrigerators after, observing outward appearance has no change.Take out sample then, in 10 s, with 500 g steel balls, apart from sample 500 mm height, impact sample surfaces, whether the sample surfaces after being hit with visual method evaluation has crackle and other defective.
2.3 heat-resisting dimensional contraction rate
On goods, get the sample of 60 mm * 60 mm, two groups of parallel lines of 50 mm that draw respectively * 50 mm are parallel to respectively and perpendicular to flow direction, and measure the distance between the line.Afterwards, sample at 90 ℃ ± 2 ℃ condition held 2 h+0.5 h, is taken out and is cooled to room temperature, measure the distance of same position between the line once more, calculate it at flow direction with perpendicular to the maximum contraction rate on the flow direction.
2.4 weathering resistance
Intercepting 60 mm on goods * 60 mm samples, in the xenon lamp weathering age proofing box of packing into, the outside surface one side is towards fluorescent tube; Blackboard temperature is 63 ℃ ± 3 ℃; Relative humidity 50% ± 5%, by GB/T 16422.2-1999 tentative specification requirement irradiation 1200 h, spraying water in the test, (the water spray circulation is water spray 18 min; 102 min do not spray water), relative humidity is meant that humidity does not reach the relative humidity after stablizing when spraying water.After the test, take out sample range estimation cosmetic variation situation, choose progression with the gray scale contrast by the variable color of GB 250-2008 tentative specification regulation.
2.5 chemical proofing
Goods are cut into the sample of 80 mm * 20 mm; Then respectively with railway grease, go up photosensitiveness paraffin, protectiveness paraffin, gasoline (petrol-resistance is only done cold test), diesel oil, brake fluid, engine oil, oil liniment, remove cerate, the binding up with gauze of deicing fluid, clean-out system dipping; At room temperature place 1 h; Put into 80 ℃ of thermostat container 3 h again, take out back range estimation cosmetic variation situation.
2.6 stopping property
Goods are installed on the LOT platform, except that leaving place's aeration aperture, other each hole of shutoff; In goods, apply the air positive pressure of 0.1 MPa ± 0.01 MPa then; Under the pressure of 0.1 MPa, pressurize was observed urea box sensor site and filler place leakage situation after 5 minutes.
2.7 anti-negative pressure test
Urea box carries out following two tests in the regulation test conditions is placed down in standard-sized metal frame:
A) under the room temperature urea box is applied 3.0 kPa negative pressure, measure each face dimensional change amount of urea box behind pressurize 20 min;
Behind 50 ℃ of insulation 5 h, under this temperature, urea box is added 3.0 kPa negative pressure, measure each face dimensional change amount of urea box behind pressurize 20 min.
Claims (1)
1. high-strength durable type rotational moulding automobile urea box is characterized in that:
The weight part of making urea box masterbatch material requested consists of:
Linear low density polyethylene 20 high density polyethylene(HDPE)s 30
POE 50 calcium stearates 1～2 antioxidant 1010 2～3
Oxidation inhibitor 168 4～6 static inhibitor-------hydroxyethyl alkylamine 3-8;
The weight part of making the urea box material requested consists of:
Masterbatch 8～10 linear low density polyethylenes 90～92.
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| CN2010106046481A CN102532646A (en) | 2010-12-24 | 2010-12-24 | High-strength durable type rotational-molded automobile urea box |
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| CN2010106046481A CN102532646A (en) | 2010-12-24 | 2010-12-24 | High-strength durable type rotational-molded automobile urea box |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102816366A (en) * | 2012-08-15 | 2012-12-12 | 中国第一汽车股份有限公司 | Special high rigidity and weathering resistance automotive blow molding urea container material |
| CN102816372A (en) * | 2012-08-15 | 2012-12-12 | 中国第一汽车股份有限公司 | Special high impact weathering resistance vehicle rotational moulding plastic tool box material |
| CN108059763A (en) * | 2017-12-20 | 2018-05-22 | 宁波春华汽配有限公司 | A kind of high-fluidity rotational molding polyethylene mixture and preparation method thereof |
| CN108250559A (en) * | 2018-03-05 | 2018-07-06 | 象山杰尔德智能科技有限公司 | A kind of high-performance rotational moulding type urea box and preparation method thereof |
| CN109679180A (en) * | 2018-11-23 | 2019-04-26 | 金旸（厦门）新材料科技有限公司 | A kind of injection molding urea box PP Pipe Compound and preparation method thereof |
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2010
- 2010-12-24 CN CN2010106046481A patent/CN102532646A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102816366A (en) * | 2012-08-15 | 2012-12-12 | 中国第一汽车股份有限公司 | Special high rigidity and weathering resistance automotive blow molding urea container material |
| CN102816372A (en) * | 2012-08-15 | 2012-12-12 | 中国第一汽车股份有限公司 | Special high impact weathering resistance vehicle rotational moulding plastic tool box material |
| CN102816366B (en) * | 2012-08-15 | 2017-04-05 | 中国第一汽车股份有限公司 | A kind of high rigidity weatherability automobile is blow molded urea container proprietary material |
| CN108059763A (en) * | 2017-12-20 | 2018-05-22 | 宁波春华汽配有限公司 | A kind of high-fluidity rotational molding polyethylene mixture and preparation method thereof |
| CN108250559A (en) * | 2018-03-05 | 2018-07-06 | 象山杰尔德智能科技有限公司 | A kind of high-performance rotational moulding type urea box and preparation method thereof |
| CN109679180A (en) * | 2018-11-23 | 2019-04-26 | 金旸（厦门）新材料科技有限公司 | A kind of injection molding urea box PP Pipe Compound and preparation method thereof |
| CN109679180B (en) * | 2018-11-23 | 2021-10-22 | 金旸（厦门）新材料科技有限公司 | Special material for injection molding urea box and preparation method thereof |
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Application publication date: 20120704 |