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Modified PP automobile wheel casing and preparation method thereof

A modified technology for automobiles, applied in the field of modified PP automobile wheel covers and its preparation, which can solve the problems of low impact strength, tensile strength, elongation at break and Shore hardness

Inactive Publication Date: 2015-01-21
SUZHOU POLYMER NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above technical problems, the present application provides a modified PP automobile wheel cover and its preparation method, which solves the technical problems of the existing modified PP automobile wheel cover such as low notched impact strength, tensile strength, elongation at break and low Shore hardness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 100 parts of PP; 10 parts of SBS; 10 parts of EPDM; 25 parts of LLDPE; 5 parts of LDPE; 20 parts of PET; 0.5 parts of chlorinated polyethylene; 0.2 parts of sodium benzoate; 10 parts of PA6; 1 part of DBP; 1 part of SEP; 15 parts of diatomaceous earth; 25 parts of EPP; 30 parts of calcium carbonate.

[0026] Put PA6, PET, SBS, SEP and sodium benzoate into the reaction kettle and heat to 60°C, dry for 10 hours, then add EPDM, LLDPE, LDPE and EPP, raise the temperature to 80°C, stir for 10 minutes, and the stirring speed is 200 rpm.

[0027] Put the stirred material into a single-screw extruder to extrude and granulate, the barrel temperature is 210°C, 225°C and 240°C, the screw speed is 11r / min, add the remaining raw materials, and plasticize on a double-roller plastic mixer. The temperature is 170°C.

[0028] The tensile strength of the product is 35MPa, the Shore hardness is 94; the elongation at break is 600%, the notched impact strength is 600kJ / m; the heat distorti...

Embodiment 2

[0030] 100 parts of PP; 30 parts of SBS; 30 parts of EPDM; 45 parts of LLDPE; 25 parts of LDPE; 40 parts of PET; 2.5 parts of chlorinated polyethylene; 0.8 parts of sodium benzoate; 20 parts of PA6; 20 parts of DBP; 25 parts of SEP; 35 parts of diatomaceous earth; 45 parts of EPP; 50 parts of calcium carbonate.

[0031] Put PA6, PET, SBS, SEP and sodium benzoate into the reactor and heat to 70°C, dry for 12 hours, then add EPDM, LLDPE, LDPE and EPP, raise the temperature to 90°C, stir for 30min, and the stirring speed is 400 rpm.

[0032] Put the stirred material into a single-screw extruder to extrude and granulate, the barrel temperature is 210°C, 225°C and 240°C, the screw speed is 15r / min, add the remaining raw materials, and plasticize on a twin-roller plastic mixer. The temperature is 190°C.

[0033] The tensile strength of the product is 40MPa, the Shore hardness is 95; the elongation at break is 650%, the notched impact strength is 650kJ / m; the heat distortion tempera...

Embodiment 3

[0035] Weigh 100 parts of PP; 15 parts of SBS; 15 parts of EPDM; 30 parts of LLDPE; 10 parts of LDPE; 25 parts of PET; 1 part of DCP; 0.4 parts of sodium benzoate; ; 5 parts of DBP; 10 parts of SEP; 20 parts of diatomaceous earth; 30 parts of EPP; 35 parts of calcium carbonate.

[0036] Put PA6, PET, SBS, SEP and sodium benzoate into the reactor and heat to 60°C, dry for 10 hours, then add EPDM, LLDPE, LDPE and EPP, raise the temperature to 80°C, stir for 15 minutes, and the stirring speed is 250 rpm.

[0037] Put the stirred material into a single-screw extruder to extrude and granulate, the barrel temperature is 210°C, 225°C and 240°C, the screw speed is 12r / min, add the remaining raw materials, and plasticize on a twin-roller plastic mixer. The temperature is 175°C.

[0038] The tensile strength of the product is 45MPa, the Shore hardness is 96; the elongation at break is 700%, the notched impact strength is 700kJ / m; the heat distortion temperature is 145°C, the elastic mo...

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Abstract

The invention discloses a modified PP automobile wheel casing and a preparation method thereof. The preparation method of the modified PP automobile wheel casing comprises the following steps: weighing PP, SBS, EPDM, LLDPE, LDPE, PET, a crosslinking agent, sodium benzoate, triallyl isocyanurate, PA6, a plasticizer, SEP, diatomite, EPP and calcium carbonate according to a ratio in parts by weight, mixing, then extruding and pelletizing, and plastifying, so that the modified PP automobile wheel casing is obtained; the modified PP automobile wheel casing product has the properties that tensile strength is 35-55MPa, shore hardness is 94-98, elongation at break is 600-800%, notch impact strength is 600-800kJ / m, a heat distortion temperature is 140-150 DEG C, elastic modulus is 850-900MPa, and bending strength is 55-65MPa.

Description

technical field [0001] The application belongs to the field of automobile wheel cover preparation technology, and in particular relates to a modified PP automobile wheel cover and a preparation method thereof. Background technique [0002] A car wheel cover refers to the plastic decorative cover on the outside of the wheel hub. Aluminum alloy wheels do not need to add hubcaps. Generally, cars with steel hubs use hubcaps for aesthetics. Hubcaps are generally plastic. PP extruded sheet has the characteristics of light weight, uniform thickness, smooth surface, good heat resistance, high mechanical strength, excellent chemical stability and electrical insulation, and non-toxic. PP board is widely used in chemical containers, machinery, electronics, electrical appliances, food packaging, medicine, decoration and water treatment and other fields. The practical temperature of PP board can reach 100 degrees. Automobile industry (mainly using PP containing metal additives: fende...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L53/02C08L23/16C08L23/08C08L23/06C08L67/02C08L77/02C08L23/28C08K13/02C08K5/098C08K5/3492C08K3/34C08K3/26C08K5/14B29C47/92B29C48/92
CPCC08L23/12C08L2205/035C08L23/0815C08L67/02C08L53/02C08L23/16C08L23/06C08L77/02C08L23/286C08K13/02C08K5/098C08K5/34924C08K3/346C08K2003/265C08K5/12C08K5/14
Inventor 翟红波杨振枢韦洪屹
Owner SUZHOU POLYMER NEW MATERIALS TECH
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