How to choose cast acrylic board for outdoor signage? Vietnam Durable Standard
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How to choose cast acrylic board for outdoor signage? Vietnam Durable Standard
In the Vietnamese market, outdoor billboards and shop signs are facing a continuous "test" - hot sunlight, high-intensity ultraviolet radiation, frequent monsoon rains, and year-round high humidity environments, which place extremely high demands on the comprehensive weather resistance of acrylic sheets. Many bosses spend a lot of money making signs that start to turn yellow, fade, and have white edges in less than a year, which not only affects the brand image but also incurs additional expenses for frequent replacement.
So, in Vietnam's tropical monsoon climate, what kind of acrylic board should be chosen for outdoor signage? What standard does' durable 'mean? This article will start with the selection principles of outdoor signage, helping you make the right choice that can withstand the test of time.
Before answering this question, it is necessary to first clarify a conclusion: outdoor signage must prioritize the use of cast acrylic panels over extruded panels.
For ordinary indoor or short-term outdoor signage, extruded boards are sufficient, but for Vietnam's year-round high temperature, high humidity, and strong ultraviolet environment, cast boards are the truly reliable choice. The core difference between the two lies in the fact that extruded boards are made by continuously extruding granular raw materials melted at high temperatures, with lower molecular weight and slightly weaker mechanical properties. Most of them do not have UV protection function, and their outdoor service life is not comparable to that of cast boards. The color will gradually fade and they are easily brittle until they break. The casting plate is polymerized by directly injecting liquid MMA monomer into a glass mold, with high molecular weight, excellent rigidity, strength, and excellent chemical resistance. And the casting board undergoes structural polymerization during the processing and is added with ultraviolet absorbers, which have extremely high strength and UV protection function. Its outdoor service life can last for more than 5 years or even 10 years, and the color remains bright and new during use.
In addition to the production process, another key difference is the purity of the raw materials. When selecting materials, it is necessary to use boards produced from brand new materials, otherwise the weather resistance cannot be guaranteed. Pure new material acrylic has excellent UV resistance, with no yellowing, fading or cracking for 10 years outdoors, and a light transmittance of over 92%; The UV resistance of the board containing recycled materials is extremely poor, and it will turn yellow and fade within six months at most. It is easy to crack under sunlight.
For outdoor signage, it is recommended to choose UV resistant cast acrylic sheets. This type of board is added with ultraviolet absorbers during the aggregation stage and can effectively block more than 99% of ultraviolet rays when used outdoors in tropical areas with strong sunlight. Compared with ordinary acrylic boards, the effect is several times higher, greatly extending the service life of outdoor facilities and reducing maintenance costs. Some excellent cast acrylic sheets have demonstrated good resistance to yellowing and durability in outdoor applications.
This is one of the most concerning issues for buyers. The service life of cast acrylic sheets for outdoor signage mainly depends on three factors: raw material grade, UV resistant formula, and installation and maintenance quality.
New material+UV formula casting board: The service life can reach 5 to 10 years. By adding anti UV agents, the weather resistance can be improved, and the outdoor service life can reach 5 to 8 years. Some high-quality cast boards can be used outdoors for more than 5 years or even 10 years, and their color remains as bright as new during use. The casting board of Binchao New Material has a service life of more than 10 years in outdoor signage, billboards and other applications, far exceeding many other plastic materials.
Ordinary acrylic material casting board: The service life is generally about 3 years. As a comparison, the outdoor weather resistance life of UV resistant acrylic (8-10 years) is much better than that of ordinary PVC (2-3 years).
Cast boards containing recycled materials or without UV resistance: In areas with strong UV radiation such as Vietnam, significant yellowing and fading may occur within six months and are not recommended for outdoor use.
In fact, high-quality acrylic sheets have the best outdoor weather resistance among all plastic materials. Under normal outdoor use conditions, acrylic board signs designed and processed reasonably will not experience a decrease in mechanical strength or significant changes in appearance after a 10-year service life.
Based on the characteristics of the Vietnamese market and industry evaluation, the following types of cast acrylic sheets are worth paying attention to:
1. Local OEM/ODM casting board supplier in Vietnam
There are already many local manufacturers in the Vietnamese market using 100% Japanese pure MMA raw materials to produce cast acrylic sheets. The products focus on weather resistance and UV resistance, suitable for outdoor applications such as signs, display cabinets, skylights, etc., and support size customization. This type of localized product has certain advantages in terms of price and delivery time.
2. Meichen ® Highly transparent acrylic board
Meichen uses pure casting technology to provide reliable substrates for display props, signage, and building lighting. Provide two levels of "imported raw materials" and "cost-effective domestic materials" to accurately match high-end projects and cost control needs. Its products have strong weather resistance, can withstand ultraviolet rays and temperature changes, and can maintain performance and appearance for long-term outdoor applications.
3. Mitsubishi Liyang series casting board
Mitsubishi Shin Kong Nippon Paint has good weather resistance and can maintain bright colors or high transparency even after long-term use. Its density is about half that of glass and it is easy to install and use.
4. Binchao New Material Casting Board, Shunde District, Foshan City
Binchao casting board exhibits excellent weather resistance and UV resistance. It has a higher molecular weight and more stable molecular chains, which can effectively resist ultraviolet radiation in sunlight. Long term outdoor use, such as outdoor signs, billboards, building skylights, etc., is not prone to yellowing, brittleness, or loss of luster, and has a service life of over 10 years. The impact strength of Binchao cast board is about 20% -30% higher than that of extruded board. It is more resistant to impact and less prone to bending at the same thickness, and the finished product is more sturdy and durable.
Even with the right material selection, outdoor use may still encounter the following common problems:
Yellowing and fading: This is the most common aging manifestation of outdoor acrylic. When ultraviolet light is irradiated on the surface of acrylic for a long time, oxygen in the air participates in causing the main chain to break and the molecular weight to decrease, and producing a large number of color generating groups such as carbonyl groups, resulting in yellowing of the board. The solution is to choose a brand new material casting board with sufficient UV absorbers added to fundamentally improve its resistance to yellowing.
High temperature deformation: Acrylic sheets are very sensitive to temperature changes. When the temperature is above 96 ° C, it will cause thermal deformation. Under the scorching summer sun in Vietnam, the surface temperature of dark colored acrylic can reach 60-70 ° C. Although it is still within a safe range, it is recommended to choose a thickness of 5mm or more and reserve expansion joints for large-scale applications.
Humidity effect: The ester groups in acrylic materials will undergo hydrolysis reactions when exposed to water, leading to the breakage of the main chain and significant changes in performance. During the rainy season in Vietnam, the humidity is extremely high. It is recommended to seal all cutting edges during installation to prevent moisture from seeping in from the edges.
Surface brittleness: Direct sunlight and lack of maintenance can cause the surface of the board to appear "whitening" or "powdering", resulting in a loss of luster and a grayish white appearance. Long term exposure to sunlight and lack of maintenance can easily occur.
Response measures: Select new materials for UV resistant casting boards; Choose light colored boards to reduce heat absorption; Seal the edges with neutral sealant to prevent moisture erosion; Regular cleaning and maintenance; Choose sufficient thickness for large-scale applications.
| product type | pet、ps、acrylic、acrylic mirror、pvc sheet,acrylic sheet |
| thickness | 0.35-300mm |
| Styles | 1220*2440,1220*1830,500*900,50*60,960*1950,700*900/Customization of various specifications and sizes |
| delivery time | 5-8day |
| manufacture | Yifang |
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