Many buyers in Southeast Asia have encountered PC sheet yellowing after 1–2 years of use. The transparency decreases, the appearance becomes old, and the structural strength drops. This article analyzes the real causes and solutions.
Main causes of yellowing:
•No UV protective layer
Low-cost sheets use recycled materials and have no co-extruded UV coating. UV rays destroy the molecular structure, causing rapid yellowing and brittleness.
•Use of recycled raw materials
Recycled PC materials contain impurities and unstable components, which age quickly under sunlight.
•Incorrect installation direction
Installing the UV-coated side inward makes the sheet directly exposed to sunlight, accelerating aging.
•Exposure to chemical corrosion
Contact with acidic, alkaline, or oily substances will damage the surface layer and cause discoloration.
How to avoid yellowing:
•Choose UV co-extruded sheets
Ensure the sheet has a UV protective layer of more than 50μm, with a 10-year warranty.
•Use 100% virgin raw materials
Virgin materials have stable performance and strong anti-aging ability.
•Confirm installation direction
Strictly install according to the “UV OUT” mark.
•Avoid chemical contact
Do not use strong corrosive cleaning agents during daily cleaning.
How Jietai solves yellowing:
All our PC sheets use 100% virgin Bayer raw materials, with 50μm double-sided UV coating, and provide a 10-year anti-yellowing warranty. After years of application in Southeast Asia, the product remains transparent and durable.
