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Yellowing Resistance Aging Tester
Yellowing Resistance Aging Tester
Car headlights often turn yellow over time due to various factors. This document explains the reasons behind this yellowing and provides guidance on selecting appropriate headlights.
Most car lampshades are made from polycarbonate (PC) or polymethyl methacrylate (PMMA) plastics, which age over time. Factors accelerating this process include high temperatures, ultraviolet rays, ozone, exposure to chemicals, and improper cleaning products.
To prevent yellowing, avoid sun exposure, regularly clean the headlights with a soft cloth and alkaline water, and apply a polishing agent followed by waxing.
ABS engineering plastic, a PC/ABS alloy, is recommended for lampshades due to its excellent heat and weather resistance, dimensional stability, and impact resistance.
Manufacturers can use the HD-E704 Yellowing Resistance Aging Tester to assess yellowing resistance. This equipment performs aging and yellowing resistance tests, simulating long-term exposure to atmospheric conditions.
The tester is designed for ergonomic use, featuring simple operation, automatic calibration, and data storage. It meets international standards and offers various measurement modes.
Choosing headlights made from engineering plastic alloys is recommended to prevent yellowing, which can reduce visibility and pose safety risks.
Catalog excerpts
In the era of running, have your headlights kept up? Everyone knows that car headlights will turn yellow after being used for a period of time. Today, I will tell you why the headlights turn yellow and how to choose the headlights? At present, most automobile lampshades are injection molded of polycarbonate (PC) or polymethyl methacrylate (PMMA) plastics. Plastic products will gradually age during use. High temperature, ultraviolet rays and ozone will accelerate the aging process. In addition, frequent trips to areas where chemical substances are leaked, or industrial areas where pigment and dye production companies are intensive, or even using the wrong car cleaning and maintenance products, may cause the lampshade to turn yellow.
Open the catalog to page 1
The main reason for the yellowing of the surface of the car headlights is the sun exposure, so avoiding the sun exposure is the most direct way to avoid the headlights turning yellow. Wipe the surface of the headlight regularly with a soft cloth to avoid long-term adhesion of dirt. Use alkaline water to clean the headlights. You can use soapy water. After cleaning, wipe it with a polishing agent, and then wax it for care. ABS engineering plastic is the best material for producing lampshades. ABS engineering plastic is PC/ABS (engineering plastic alloy). The Chinese name in the chemical industry...
Open the catalog to page 2
dimensional stability and impact resistance, as well as the excellent processing fluidity of ABS resin. For manufacturers of car headlights, how to detect whether the headlights have good yellowing resistance, then use a test box for testing yellowing resistance. Here is a test equipment for yellowing resistance. . HD-E704 Yellowing Resistance Aging Tester can do two kinds of tests: aging and yellowing resistance. Aging: This machine can promote the deterioration of vulcanized
Open the catalog to page 3
rubber to calculate the rate of change of tensile force and elongation before and after heating. It is generally considered that testing at 70°C for one day is theoretically equivalent to 6 months of exposure to the atmosphere. Yellow resistance: This machine simulates the atmospheric environment and is exposed to ultraviolet rays from the sun. The appearance change is generally considered to be tested at 50 ℃ for 9 hours, which is theoretically equivalent to 6 months of exposure to the atmosphere.
Open the catalog to page 4
1. Ergonomics and simple operation are the main focus of the design. The volume design of the gloss meter is reasonable, and the button operation, screen display and simple navigation menu make gloss measurement easy. One-key operation, automatic calibration at startup, automatic measurement, and storage of test data. 2. The all-metal shell is durable and comfortable, and the instrument meets various international and domestic standards with good quality. 3. Free choice of multiple functional modes, such as: automatic measurement, manual measurement, sampling measurement, statistical measurement,...
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