Views: 0 Author: Site Editor Publish Time: 2026-06-09 Origin: Site
In plastic injection molding, anti-UV additives are materials added into resin to help the product resist damage from sunlight.
When plastic is used outdoors for a long time, sunlight—especially ultraviolet (UV) rays—slowly breaks down the material. The surface may start to fade, become brittle, or even crack over time.
To slow down this process, manufacturers mix special UV protection additives into the plastic before molding. This allows the protection to become part of the material itself, not just a coating on the surface.
Many people think plastic is stable, but in real outdoor conditions, UV exposure is one of the biggest reasons for product aging.
Without UV protection, you may notice:
Plastic color becomes dull or faded
Surface starts to turn chalky
Parts become weak and easy to break
Outdoor furniture loses appearance quickly
This is especially important for products like outdoor chairs, garden furniture, and scooter parts, which stay under sunlight for years.
UV absorbers work by capturing UV energy and converting it into heat. This helps reduce the direct damage caused by sunlight.
They are commonly used in general outdoor plastic products where basic protection is needed.
HALS is considered one of the most effective UV protection additives.
Instead of just absorbing UV light, it helps stop the aging reaction inside the plastic. This makes the material last longer, especially in harsh outdoor environments.
Because of this, HALS is often used in higher-end outdoor furniture and industrial plastic parts.
Some color materials can also help improve UV resistance. For example, carbon black is known for its strong ability to block UV rays.
However, its effect depends on product design and color requirements.
During the injection molding process, UV additives are mixed evenly with plastic raw materials.
After heating and molding, the final product already contains UV protection inside the structure. This means the protection will not easily wear off like surface coatings.
In real outdoor use, this is much more stable and reliable.
UV-resistant plastic materials are commonly used in products such as:
Outdoor office chairs and seating systems
Garden and patio furniture
Beach chairs and leisure products
Electric scooter plastic parts
Outdoor storage and containers
These products need long service life under sunlight, so UV protection is essential.
Using anti-UV additives in plastic products can bring several practical benefits:
Longer outdoor lifespan
Better color stability over time
Reduced cracking and surface damage
Improved product reliability
Lower replacement and maintenance cost
In many cases, it directly affects how customers judge product quality.
We are HUAJI MOULD, a professional injection mold manufacturer focusing on office chair molds and plastic furniture molds.
In our daily projects, many customers request outdoor plastic parts that must perform well under sunlight. For these cases, we do not only provide mold manufacturing, but also support material and structure suggestions.
Our experience covers:
Outdoor chair mold design
Garden furniture mold solutions
Plastic parts for scooters and household products
Surface texture and cooling optimization for better durability
We help customers improve product stability in real outdoor conditions, not just in design drawings. Our goal is to make molds that produce parts with longer life, better appearance, and fewer defects in mass production.
