Special membrane with high resistance to pesticide for watermelons

Abstract

The invention discloses a special membrane with high resistance to a pesticide for watermelons, and belongs to the field of agricultural greenhouse membrane. A long-lived parent material is added intothe formula of an outer layer, a pesticide-resistant parent material is added into a middle layer and an inner layer, the formulas of the outer layer, middle layer and inner layer are different, theformulas of the outer layer, middle layer and inner layer are separately mixed uniformly, a double-screw extruder with a double-head threaded screw is used for preparing parent particles, three layersof membranes are extruded through a co-extrusion die head to form the special membrane with the high resistance to the pesticide for the watermelons. Compared with an ordinary watermelon membrane, the special membrane with the high resistance to the pesticide for the watermelons cannot break after more pesticides are sprayed, the ordinary watermelon membrane resists less than 1500 ppm of S ions and less than 100 ppm of Cl ions in the pesticide, while the special membrane with the high resistance to the pesticide for the watermelons can resist up to 3000 ppm of S ions and up to 150 ppm of Cl ions in the pesticide by adding the anti-pesticide parent material. The special membrane can meet the requirements of not breaking a greenhouse while a large amount of pesticides are sprayed in the growth process of the watermelons.

Description

technical field [0001] The invention relates to a high-pesticide-resistant watermelon film and a preparation process thereof, in particular to the preparation of a high-pesticide-resistance watermelon film using high-grade olefin raw materials and other auxiliary agents as raw materials, and belongs to the field of agricultural shed films. Background technique [0002] Agricultural plastic shed film, its light transmittance, heat preservation, tensile and aging resistance are better than ordinary agricultural film. It is of great significance to the growth of greenhouse crops, increasing production and increasing income. At present, there are four main types of greenhouse films: the first is polyvinyl chloride (PVC) film; the second is polyethylene (PE) film; the third is ethylene-vinyl acetate copolymer film; the fourth is polyvinyl chloride (PVC) film. The first is a light-adjustable agricultural film. These types of shed films have similarities and differences in proper...

AI Technical Summary

Problems solved by technology

Taking watermelon as an example, a large number of fungicides, insecticides, acaricides, herbicides and other pesticides are used in watermelon planting. The S and Cl ions contained in these pesticides are the main factors leading to the premature aging of the shed film. After spraying pesticides, the shed film will soon appear aging phenomenon, which will easily cause the entire shed to rupture when encountering wind and rain, resulting in a reduction in watermelon production or a delay in the market, causing huge losses to users

At present, most of the films widely used in watermelon economic crops are dripping anti-aging films made of low-density polyethylene and linear low-density polyethylene materials. Although some progress has been made in anti-aging, dripping and manufacturing processes, they are still There are the following disadvantages: due to the poor pesticide resistance and low strength of ordinary polyethylene dripping anti-aging film, the performance of light transmission and heat preservation is average, it is difficult to meet the needs of the growth environment of melon crops, and the dripping duration and service life of the film are short. waste of oil resources

However, its resistance to pesticide erosion is still unsatisfactory, and in practical applications, it is found that there is a phenomenon that the duration of fogging and dripping is not synchronized with the life of the shed film, which affects the use effect

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