Large-pipe-diameter low-pressure thin-wall drip irrigation tape

Abstract

The invention relates to a large-pipe-diameter low-pressure thin-wall drip irrigation tape which is prepared from 100 phr of PE, 5.4 phr of black color masterbatch 2772, 0.3 to 0.5 phr of multifunctional masterbatches PPA, 0.8 to 1.0 phr of a complex antioxidant, 0.8 to 1.0 phr of an ultraviolet adsorbent UV-327, 0.3 to 0.5 phr of a silane coupling agent KH 151 and 0.06 to 0.1 phr of a thermal initiator DCP. A product is smooth and flat in appearance, high in strength and toughness, outstanding in photo-thermal oxygen degradation property, excellent in sun burn resistance, excellent in environmental stress resistance and low in cost; and when being actually applied to the field of water-saving irrigation, the large-pipe-diameter low-pressure thin-wall drip irrigation tape can save energy and reduce consumption, and is obvious in yield increase, income increase and effect enhancement.

Description

technical field [0001] The invention relates to the field of water-saving irrigation, in particular to a large-diameter low-pressure thin-wall drip irrigation belt. Background technique [0002] my country's agriculture is a large water user, but the utilization coefficient of irrigation water is not high, and the cost of agricultural water is too high, which is 2 to 3 times that of developed countries. Although the income of Chinese farmers has increased greatly in recent years, there is still no purchase of modern agricultural irrigation equipment. ability. This puts forward stricter requirements on the direction and goal of modern agriculture, namely low cost and low energy consumption. The drip irrigation belt is the core component of the micro-irrigation pipe network and the most critical link of precision drip irrigation. [0003] Drip irrigation tape is generally produced from three main materials of low-density polyethylene (LDPE), medium-density polyethylene (MDPE)...

AI Technical Summary

Problems solved by technology

[0003] Drip irrigation tape is generally produced from three main materials of low-density polyethylene (LDPE), medium-density polyethylene (MDPE) and high-density polyethylene (HDPE) and other auxiliary materials. However, there are many problems in the actual use process. It is mainly manifested in the sun burn of the drip irrigation belt, the side cracking of the dripper joint under extreme climate conditions, and environmental stress cracking, etc., especially the drip irrigation belt with a thickness of less than 0.2 mm, especially in Inner Mongolia, Xinjiang, Gansu Hexi Corridor and other places , causing large economic losses to agricultural production

The main reasons are: (1) LDPE, MDPE, and HDPE are all pellets and have different densities. During the mixing process, there are stratification and uneven mixing, resulting in excessive anisotropy of the low-drip irrigation belt and large local defects; ⑵LDPE, MDPE, and HDPE are physical blends. Although they can form partial cross-links, they are physical cross-links and cannot exist stably when induced by external environmental factors, and cannot resist various harsh natural environments; ⑶Although LDPE, MDPE and HDPE are both PE materials, but there are differences in linear structure and nonlinear structure, molecular weight, etc., and the compatibility of each component is not thorough enough, resulting in defects in the drip irrigation belt; (4) LDPE, MDPE, and HDPE are used as the main raw materials The production rate of the formula is generally 120 m / min, while the production rate of the existing thin-walled high-speed production line can reach 200 m / min. If the production rate is increased, the production process will cause frequent pipe breaks, resulting in a large amount of material waste, which can no longer meet the requirements of low-pressure thin-walled production lines. Wall high-speed production line requirements