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Process for preparing automobile lamp decoration ring

A preparation process and technology of automobile lamps, applied in the field of automobile lamps, can solve problems such as insufficient strength and wear resistance, low surface gloss, and easy damage, etc., to improve wear resistance and promote compatibility , the effect of high surface finish

Inactive Publication Date: 2015-04-29
DANYANG ZHONGYUAN AUTOMOBILE LIGHT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]As a functional exterior trim, the car lamp bezel has become an important part of the personalized design of the car. According to the use of the car lamp bezel The particularity of the environment, long-term use, light distribution, wall thickness and assembly usually requires that the material must have properties such as high heat resistance (≥160°C), low fog value, high surface gloss, high rigidity and toughness. Therefore, At present, the materials used as decorative rings mainly include: heat-resistant polycarbonate (PC), PBT / PET+MD, and primer-free PBT, etc., and the application number is CN201010582830.1, which discloses a polyester alloy for car lamp decorative rings Composite material and its preparation method, the invention is made of the following raw materials in parts by weight: 48.2-93.7 parts of polybutylene terephthalate; 5-30 parts of polyethylene terephthalate; inorganic filler 1- 20 parts; 0.1-0.6 parts of antioxidant; 0.1-0.6 parts of nucleating agent; Eliminate the step of primer coating and direct aluminum plating, which simplifies the production process; reduces production costs; the surface gloss of the material is high; The strength and wear resistance are insufficient, and it is easy to be damaged during the use of the car, and the replacement is more frequent, which increases the cost. In addition, the surface gloss is not very improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Drying of raw materials: PBT and PET were dried in an electric blast drying oven at 120°C for 4 hours; glycidyl methacrylate grafted ethylene-octene copolymer was dried in an electric blast drying oven at 80°C for 4 hours ;

[0018] (2) Potassium hexatitanate whisker activation treatment: After drying the potassium hexatitanate whisker at 118°C for 2.2 h, then put it into a small high-speed mixer for stirring; mix the potassium titanate coupling agent with isopropanol Put it into a sprayer; after the mixer stops running, spray the potassium titanate coupling agent mixture on the potassium hexatitanate whisker, and the dosage of the potassium titanate coupling agent mixture is 2 / 5 of its original mass each time. The interval between each spraying is controlled at 16 minutes, and the amount of potassium titanate coupling agent added is 2% of the whisker mass. The whiskers treated with potassium titanate coupling agent were stirred at high speed for 2 hours, then drie...

Embodiment 2

[0021] Example 2: The rest are the same as Example 1, except that in the step (1), the drying time of PBT and PET is controlled to be 5h, and the drying time of glycidyl methacrylate grafted ethylene-octene copolymer is controlled. The drying time is 5 hours; in the step (3), control the ratio of PBT, PET, compatibilizer glycidyl methacrylate grafted ethylene-octene copolymer, and activated potassium hexatitanate whisker to 41: 41:8:10; In the step (4), control the injection molding temperature to 275°C.

Embodiment 3

[0022] Example 3: The rest are the same as Example 1, except that in the step (1), the drying time of PBT and PET is controlled to be 6h, and the drying time of glycidyl methacrylate grafted ethylene-octene copolymer is controlled. The drying time is 6 hours; in the step (3), control the ratio of PBT, PET, compatibilizer glycidyl methacrylate grafted ethylene-octene copolymer, and activated potassium hexatitanate whisker to 41: 41:9:9; In the step (4), control the injection molding temperature to 280°C.

[0023] After the above process steps, the sample of the car light trim is taken out to be tested:

[0024] From the above data, it can be seen that the impact strength of the prepared car lamp bezel is 8.0 Above, the tensile strength has reached above 62.0 MPa, and the bending strength is around 83.0 MPa. Therefore, the strength is high, the friction coefficient is above 0.13, the wear resistance is good, and the surface gloss has reached above 99%, so the surface finish...

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Abstract

The invention discloses a process for preparing an automobile lamp decoration ring and relates to the field of rubber. The process comprises the following steps: drying of raw materials, wherein an electrothermal blowing dry box is adopted; the raw materials are dried fully so as to prepare good-quality reaction raw materials for the later preparation of a high-strength and abrasion-resistant PBT / PET alloy; activation treatment of potassium titanate whiskers, wherein a potassium titanate coupling agent and isopropanol are added, so that the potassium titanate whiskers are thin and high in strength, moreover, the activated potassium titanate whiskers are added to effectively reduce the friction factor and the abrasion of the PBT / PET alloy and improve the abrasion resistance; preparation of the high-strength and abrasion-resistant PBT / PET alloy, wherein a compatibilizer, methacrylic acid glycidyl methacrylate graft ethylene-octene copolymer plays a compatibilization role and promotes the improvement of compatibility of alloy components; moreover, the impact toughness of the alloy is improved, and the strength of the alloy is also improved greatly; injection molding process, wherein the prepared lamp decoration ring is high in surface smoothness by controlling the injection temperature well.

Description

technical field [0001] The invention relates to the field of automobile lamps, in particular to a preparation process of an automobile lamp decorative ring. [0002] Background technique [0003] As a functional exterior part, the car lamp trim ring has become an important part of the personalized design of the car. According to the use environment, long-term usability, light distribution, wall thickness and assembly of the car lamp trim ring The particularity of the material usually requires that the material must have properties such as high heat resistance (≥160°C), low fog value, high surface gloss, high rigidity and toughness. Therefore, the materials currently used as decorative rings mainly include: heat-resistant polycarbonate Ester (PC), PBT / PET+MD and primer-free PBT, etc., the application number is CN201010582830.1 discloses a polyester alloy composite material for car lamp trim ring and its preparation method, the invention consists of the following raw material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L51/06C08K9/04C08K7/08B29C45/78
Inventor 周梅生
Owner DANYANG ZHONGYUAN AUTOMOBILE LIGHT