The Application of Natural Dye on Tinted Vehicle Films – A Review

摘要

Abstract The study present the utilization of natural dye from onion skin on tinted film. Tinted film for the car and helmet visor is produced from Polyethylene Terephthalate (PET) as the main material. However, tinted films that do not meet the Visible Light Transmission (VLT) values authorized for automobiles are being used by some people. Tinted films are also often manufactured using synthetic dyes, which have negative environmental impacts. Thus, the objective of this study was to prepare the tinted film for car and helmet visors that can comply with safety standards (MS1). Tinted film produced must comply with the percentage of VLT allowed which is 30, 50 and 70. Synthetic dyes, which are frequently used in the plastic manufacturing sector, will be substituted with natural colours in this study. PET is excellent for manufacturing plastic films because it has a number of benefits, including the ability to act as an amorphouse and semi-crystalline material. Natural dye extracted from onion skin is a good dye because there are Auxochrome groups. By choosing natural dyes over other options, we are helping to protect the environment and reducing human reliance on toxic chemicals.