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Two things must be taken into account when it comes to hollow pc sheet for greenhouses!
With the advantages of long service life, good thermal insulation performance, strong heat insulation capacity, suitable price and other advantages, the hollow pc sheet has become the first choice for greenhouse cover. one of the materials. However, in the field of facility agriculture, there are many types of hollow core polycarbonate sheet and it is difficult to distinguish between them. hollow sheet, many claim to be used for ten years of hollow sheet in three or four years, or even a year or two on the yellowing or hail and damage.
So how can we practice a pair of selection of the hollow pc sheet "eyes"? It's simple, we just need to look at these two important attributes of hollow pc sheet.
hollow pc sheet flower house
Polymers under UV light will produce molecular chain breaks, which manifests itself in the aging of the material, and the hollow pc sheet is made from polycarbonate. As a polymer material, how can you guarantee that it will not age and break down after a decade of use under sunlight? The reason for this is that a high quality hollow pc sheet has a co-extruded UV protection layer on its surface, due to which it avoids the main The material is damaged by UV rays, thus ensuring that the hollow pc sheet do not deteriorate and destroy within a decade.
hollow pc sheet Corridor
Although the thickness and uniformity of the ultraviolet layer (referred to as UV layer) to be tested by professional equipment, but its presence or absence can be seen by the naked eye to see whether it exists: the end of the hollow pc sheet towards the direction of light, due to the UV raw material is blue, so one side of the co-extruded with the UV layer will appear light blue, while the other side is not blue.
hollow pc sheet Roof
Due to the high relative humidity in the greenhouse (70%~80%) and the high K value of the hollow pc sheet (8㎜ double-layer hollow pc sheet K is commonly used), it is possible to use the K value of the hollow pc sheet in the greenhouse. (value of 3.3), so the inside of the hollow pc sheet is usually prone to condensation, condensation if attached to the inside of the panel in the form of small droplets of mist, the This will result in a significant reduction in light transmission (it will exceed 10%), and if condensation collects as droplets, it may be directly on top of the greenhouse. dripping, so it is important that the hollow pc sheet for greenhouses have an anti-dripping feature to avoid reduced light transmission or dripping of condensation.
External wall of the hollow pc sheet
The performance of different hollow pc sheet anti-fog drip is very different, the method to identify the quality of its good or bad is very simple, just take a cup of hot water on the bottom of the board! If condensate forms mist or droplets on the underside of the sheet, it indicates that the anti-dripping effect is not good. At present, with the advancement of technology, the anti-drip technology has been upgraded to the second generation of anti-drip technology, compared to the generation of technology, the new generation of anti-drip technology has been upgraded to the second generation of anti-drip technology, compared to the generation of technology, the new generation of anti-drip technology has been upgraded to the second generation of anti-drip technology. The fog drop technology has obvious advantages in the uniformity and durability of the anti-fog drop layer.
Colorful hollow pc sheet roof
Hebei Unocal Plastic Manufacturing Co., Ltd. not only adopts the second generation of anti-fogging technology for sheet production, but also can co-extrude custom-made sheets according to customers' needs. The thickness UV coating greatly extends the service life of the hollow pc sheet. At the same time, relying on strong R & D resources, we continue to introduce technologies and products that are more suitable for facility agriculture and better serve the facility agriculture field. .