As we all know, glass molded grating has many advantages, such as acid and alkali corrosion resistance, aging resistance, long service life, light weight and high strength, flame retardant and non-slip. The appearance of FRP grating can be said to fundamentally solve the problem of corrosion and damage of traditional metal materials, wood plastics and other products. The excellent corrosion resistance of FRP grating makes it easy to use in harsh corrosive applications. So, is there any shortcoming in this excellent product? Can FRP gratings withstand the sun?

Disadvantages of FRP grating

As we all know, everything has its two sides, and the FRP grating is no exception. It has many advantages, and it also has some shortcomings. For example, the more prominent point is that the FRP material has almost no secondary recovery value. It is not recycled like the metal grating.

However, looking at this problem from another angle, it also creates a major advantage of molded grids. Because it has no secondary recovery value, it also indirectly reduces the risk of theft. The use of fiberglass bark, trench cover, manhole cover, etc., can effectively reduce the chance of the product being stolen. It can be said that it has very good Social benefits.

So, back to the beginning of our text, can FRP gratings withstand the sun? The answer is not. The anti-UV performance of the FRP grating is general. When the molded grating is exposed to the sun for a long time, the resin on the surface of the product will be decomposed, revealing the internal glass fiber material, which will affect the overall aesthetics of the product, but It does not affect the strength performance of the grid. We can apply a layer of resin material on the surface of the grid to solve this problem. It can also be strengthened by making a 0.5mm thick resin-rich layer and UV absorber on the surface of the product during processing in the factory. Its UV resistance.

How to distinguish the good or bad of the grid

We can identify the quality of the grille by observing the appearance of the FRP grating and performing some simple tests.

1. Observing the appearance of the grid is the most direct and simple method of identification. If the surface of the grid product is smooth, there are few pores, no cracks, no falling pieces, then the quality of the product is better; on the contrary, if the surface of the product is rough and off Blocks, cracks, and more pores, then the quality of the product is much worse. The quality molded grille appearance has the following characteristics:

a, the quality of the molded grille surface is smooth and translucent, the hand touch is very smooth, and the touch is very good;

b. The good quality grille has no strong pungent smell and a light varnish smell;

c. Observe the number of glass fiber layers of the grid plate, and the number of glass layers of the molded grid of different thicknesses is also different. For example, the 38X38X25mm grid plate is generally a 5-layer glass fiber yarn; the 38X38X38mm specification is generally an 8-layer glass fiber yarn. In addition, glass fiber rovings are also distinguished by type. For example, the best strength is alkali-free glass fiber, followed by medium-alkali glass fiber, and the worst is high-alkali glass fiber. The better the strength of the glass fiber, the better the strength of the grid plate is produced. Of course, the price of the product is relatively high;

d. The grid product is slightly better with some bubbles, which means that the high-quality resin is used. Because the density of the good resin is large, fewer small bubbles are generated.

2, product bearing test is a relatively intuitive method, on-site load-bearing test on the grid plate, to see if the grille is permanently deformed, to observe the load-bearing capacity of the product;

3. Tap the outer wall of the molded grille to see if the sound is crisp. If it is crisp, it means that the resin has more materials and less filler, and the proportion of raw materials is suitable. On the contrary, if the sound of the tapping is rather dull, it means that the resin is used less, the calcium powder is more, and the quality of the grid is relatively poor.

In summary, we can know that the FRP grating plate can not be exposed to the sun for a long time. If the grid plate is used in a strong ultraviolet environment, a layer of UV absorber should be applied at the factory to ensure that the product can be more Long-term use for us.