What are the UV degradation rates for different types of plastic landscape tables?

Plastic landscape tables are popular for outdoor use due to their durability and low maintenance, but their longevity depends significantly on UV degradation rates. Different plastic types exhibit varying resistance to sunlight exposure, which breaks down polymer chains over time.

1. Polyethylene (PE) Tables:

- Degradation Rate: 0.5-1.2% per year under constant UV exposure

- Characteristics: Affordable but prone to surface cracking and color fading after 2-3 years without UV stabilizers.

2. Polypropylene (PP) Tables:

- Degradation Rate: 0.3-0.8% per year

- Characteristics: Better UV resistance than PE, often blended with additives to extend lifespan to 5+ years.

3. High-Density Polyethylene (HDPE) Tables:

- Degradation Rate: 0.2-0.6% per year

- Characteristics: Superior UV stability, commonly used in premium outdoor furniture; lasts 7-10 years with proper treatment.

4. Polyvinyl Chloride (PVC) Tables:

- Degradation Rate: 1-1.5% per year

- Characteristics: Vulnerable to UV-induced brittleness unless coated with protective layers.

5. Acrylic (PMMA) Tables:

- Degradation Rate: 0.1-0.4% per year

- Characteristics: Excellent UV resistance but higher cost; maintains clarity and color for over a decade.

Factors Influencing Degradation:

- UV Stabilizers: Additives like carbon black or hindered amine light stabilizers (HALS) can reduce degradation by up to 70%.

- Climate: Tables in tropical or high-altitude regions degrade faster due to intense UV radiation.

- Maintenance: Regular cleaning and protective coatings slow degradation.

For long-term durability, opt for HDPE or acrylic tables with UV inhibitors, and consider shaded placements to minimize direct sunlight exposure.