english Will the environmental performance of aluminum plate protective film decrease with the use time
2025-07-21
Environmental Performance Degradation of Aluminum Plate Protective Film
The environmental performance of aluminum plate protective film will gradually decrease with the use time. The core reason is the combined effect of material aging and environmental factors, which is specifically reflected in three aspects:
Stability Decay of the Substrate
In the long-term use of protective film substrates (such as PE, PET), affected by ultraviolet rays, temperature changes and oxygen, oxidative degradation will occur, and the molecular chain will break to produce small molecular volatiles.
After 12 months of exposure to the sun, the protective film used outdoors may release trace amounts of formaldehyde or benzene. Products that originally meet the RoHS standard may lose their environmental properties due to excessive degradation products.
In addition, the substrate becomes brittle and easy to break. If the plastic debris produced enters the environment, it will increase the risk of microplastic pollution.
Chemical Stability of the Adhesive Layer
Acrylic pressure-sensitive adhesives are common adhesive layer materials. In high temperature and high humidity environments, the adhesive layer may undergo hydrolysis reactions and release free monomers.
If these monomers exceed the safety threshold (such as the restrictions on acrylates in the EU REACH regulations), the environmental performance will not meet the standards.
At the same time, the adhesive layer becomes unbalanced after aging, and the residual adhesive stains during peeling need to be cleaned with solvents, and the solvents themselves may contain volatile organic compounds (VOCs), further exacerbating environmental risks.
Migration of Additives
Antioxidants, light stabilizers and other additives added in the production of protective films will slowly migrate to the surface and volatilize over time, causing the material to lose stable protection and accelerate the aging of the substrate and adhesive layer.
After the antioxidant is exhausted, the substrate oxidizes faster, and may show obvious yellowing within 3-6 months, while releasing more degradation products, causing the environmental performance to continue to decline.
The environmental performance of aluminum plate protective films will gradually decay with the use time, especially in harsh environments such as outdoor, high temperature and high humidity, the decay rate is faster, so it needs to be replaced in time according to the use cycle to avoid exceeding the environmental performance standard.
