Here is a brief introduction to the raw materials of the insect control net in the shed. There are many kinds of materials for making insect screen in the shed, including stainless steel, copper, polyethylene, nylon, glass fiber and composition materials, among which the durability and strength of insect screen made of stainless steel and copper are the best, but the price is expensive.
Nylon material has low cost, but poor durability and high ventilation resistance. Therefore, greenhouse use is less. Glass fiber, polyethylene and their composition are the most important data types of insect proof net used in greenhouse.
The standard mesh number of insect net the standard of insect net is generally indicated by "mesh number" and "width". "Mesh" refers to the number of warp or weft yarns within one inch square (length 25.4mm, width 25.4mm). Different data standards are different. The primary standards of polyethylene insect net are 20, 24, 30, 40, 50, 60, etc.; the width is divided into 1m, 1.2m, 1.5m, 2m, 3M, etc. There are 10 "mesh" standards in the standard of glass fiber insect screen, 40 × 40 indicates that the mesh is 40 mesh. In addition, the diameter of the net wire is also an important parameter of the insect net. The scale is 0.14mm ~ 0.18mm, which affects the size of the ventilation resistance.
The color of insect screen is more. At present, there are mainly three types of greenhouse production: one is silver gray live aluminum foil insect screen, which has better aphid avoidance effect and can reduce the temperature in the greenhouse; the other is white insect screen, which has good light transmittance and is suitable for cultivating most light loving vegetables in the greenhouse; the third is black insect screen, which has outstanding sunshade and cooling effect.