What is the difference between PO membrane and ordinary membrane? Let's give you a brief introduction:
Ordinary film generally refers to polyethylene PE film, the current use of polyethylene PE film in the country is the largest, before this, most shed farmers mainly use polyethylene PVC film, because PVC film is cheap, and the thermal insulation is not bad, but PVC film is not environmentally friendly, in the strong sunlight is easy to release harmful gases, will pollute the environment, so later the country began to vigorously promote the use of polyethylene PE film, because polyethylene is a non-toxic and harmless material. At present, there are many manufacturers of polyethylene PE film, so the ordinary film that the people think should refer to polyethylene PE film.
Polyethylene PE film can be divided into three types from the function, one is a longevity film with drops, also called aging resistant film, because the longevity film can not prevent droplets, so it is generally used in dry climate areas. The other is non-drip film, also called longevity drip film, is based on the longevity film, the inner side of the membrane is added dripping agent, so that it has the function of anti-dripping, so this longevity drip film has positive and negative sides, the outside is anti-aging, the inside is anti-dripping, can not be reversed. There is also a PE anti-fog film, which is based on the longevity drip film, adding anti-fog agent, which has a certain anti-fogging ability. PE anti-fog film also has front and back sides, which cannot be reversed.
PO membrane is a new type of agricultural greenhouse film, PO membrane compared with ordinary membrane, the difference is:
1) The transparency of PO film is generally higher than that of ordinary film, and the transparency of general PO film is above 90%, while the transparency of ordinary film is about 80%~85%.
2) Even if no additional thermal insulation agent is added, the thermal insulation performance of PO film is better than that of ordinary film.
3) PO film droplet performance is excellent, droplet validity period can be synchronized with the life of the membrane, while ordinary film, either no drip function, or drip validity period is very short, generally only 3-4 months.
4) PO film can eliminate fog for life, while ordinary film does not have anti-fog type, even if it is ordinary PE anti-fog film, its anti-fog performance is limited.
5) The droplet antimist performance of PO film does not depend on the addition of droplets and antifogging agent, but by coating liquid, through a special process, the coating liquid is coated on the inner surface of PO film, and then formed by drying. Therefore, the PO film also has positive and negative sides, the outside is anti-aging, the inner surface is a coating layer, and the drip is anti-fog.
6) The tensile strength of PO film, which is often said to be tensile force, is higher than that of ordinary film.
7) PO film because the production process is more complex than ordinary film, the cost increases, so the price is more expensive than ordinary film, but because PO film has strong aging resistance, even if the price is a little more expensive, but can be used continuously for many years, on average, the cost of one year is cheaper. The general service life of ordinary membranes is one year.