The quality is uneven on the market and many users often cannot distinguish the quality of the products when buying. In response to this problem, the editor will teach you how to distinguish the quality of the greenhouse film, mainly from the four aspects of seeing, dragging, poking, and burning, as follows:
One, look
First of all, let's look at the light transmittance of this greenhouse film. The more transparent it is, the better the quality of the greenhouse film is, and vice versa. Secondly, looking at the uniformity of the color of the film, the domestic greenhouse film is mainly blow molding due to the lag in production process, and the blow molding process is affected by the temperature, the thickness is different, the performance is uneven color, the thick place is dark, The thin areas are light in color. In windy weather, the greenhouse film can easily tear from a thin area.
 

Second, drag
In this method, we mainly check the tensile strength of the greenhouse film. The method is as follows: First, pull one side of the greenhouse film horizontally and then pull vertically, and then do the destructive test. Pay attention to not being able to apply force on a large area. Be sure to pull a corner, the harder it is, the harder it is to break, which proves the tensile strength The better the tensile strength; if it breaks with a light pull, the quality is relatively poor. The large tensile strength indicates the wind resistance of the greenhouse film, and the stronger the durability.

 
Three, poke
Use a finger to poke a small hole in the middle of the greenhouse film, and then tear the four edges along the hole to increase the area of the hole. If you apply a little force, the hole will expand in a large area, indicating that the quality is not very good, and the use will not last long. If you encounter windy weather after the shed, it will often grow from the small mechanical wound with the wind, so it will rot and cannot continue to use.
 

Four, burn
When any chemical substance meets fire, it will produce a certain chemical reaction. What we use is to burn with fire and smell the smell. If it is very smelly after being ignited, accompanied by a pungent smell, and a lot of black smoke is emitted, a lot of black raw materials are dripped. The material of this shed film is PVC. If it is marked as PE or EVA, it may be in production. Some recycled materials are added, and the quality is not very good.