Manufacturing method of moistureproof fertilizer sustained release packaging structure

Abstract

The invention provides a manufacturing method of a moistureproof fertilizer sustained release packaging structure. The method comprises the following steps: A, integrally molding a plate body by use of resin, wherein the thickness of the plate body is 5-8mm; B, setting multiple cutting lines on the plate body, wherein the cutting lines are transverse lines and longitudinal lines; the transverse lines are vertical to the longitudinal lines, and the plate body is divided into a plurality of square regions by the two adjacent transverse lines and the longitudinal lines; C, forming grooves in the square regions and embedding fertilizer bags into the grooves, wherein the fertilizer bags are wedged and fixed in the grooves and shells of the fertilizer bags are sulphur coated urea products; D, wrapping the exteriors of the fertilizer bags with plastic films, and performing ultrasonic welding on the plastic films and the plate body; E, welding the lower edge of the periphery of a moistureproof cover by use of a plastic packaging machine, so that a seal space is formed between the plate body and the moistureproof cover; F, welding two to three support columns at the peripheries of the grooves by virtue of ultrasonic, wherein the fertilizer bags are spherical and the heights of the support columns are greater than the radius of the fertilizer bag. The manufacturing method is simple; the manufactured product is simple in structure, convenient in use, long in sustained release time and good in fertilizer efficiency; the shells are not easy to break in a transportation process.

Description

[0001] technical field : [0002] The invention relates to the technical field of organic fertilizers, in particular to a method for manufacturing a moisture-proof fertilizer slow-release packaging structure. [0003] Background technique : [0004] Slow-release fertilizers are also known as slow-release fertilizers or controlled-release fertilizers. The nutrient-containing compounds in the fertilizer are released slowly in the soil or the nutrient release rate can be controlled to a certain extent for the continuous absorption and utilization of crops. Slow-acting fertilizers are divided into three categories: (1) insoluble compounds in water, such as magnesium ammonium phosphate, etc.; (2) coated or coated fertilizers, such as sulfur-coated urea, etc.; (3) carrier slow-release fertilizers, namely fertilizers Fertilizers in which nutrients are physically or chemically bound to natural or synthetic substances. [0005] At present, the main slow-release fertilizers are ...

AI Technical Summary

Problems solved by technology

[0009] The key to resin-coated urea is the uniformity and controllability of the coating and the stability of the coating. Some coated urea coatings are very brittle and even in It is easy to fall off during transportation and affect the effect of the coating. The uneven thickness of the coating and the different release rate are also factors that affect the application effect of coated urea.

At present, there is still a problem with coated urea. Some coating processes are more complicated, and the price of coating materials is relatively high. After coating, the cost increases too high.

Affect the application range of fertilizers. Some coating materials are not easy to degrade in the soil. Long-term continuous use will also cause pollution to the soil environment and damage the physical properties of the soil.

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