Thermoplastic resin membrane wrapping control-releasing fertilizer using sulfur as base coat

A thermoplastic resin, coated controlled-release fertilizer technology, applied in the form of fertilizer, fertilization device, fertilizer mixture, etc., can solve the problems of unsatisfactory water blocking performance, unsatisfactory nutrient controlled release, unsatisfactory controlled release performance, etc., to achieve improvement The effect of sulfur film properties, nutrient controlled release performance improvement, and extensive application prospects

Active Publication Date: 2011-03-30
KINGENTA ECOLOGICAL ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the diethylene glycol-triethanolamine polyol and the diisooxyacid polymer used in this invention react to form a film. Although the film has a certain toughness, the water blocking performance is not ideal. Moisture can easily permeate the film layer. The sulfur enters the fertilizer through the cracks of the film, causing its nutrients to dissolve rapidly, resulting in unsatisfactory controlled release performance.
[0005] The film layer made of recycled thermoplastic polyethylene has good toughness, wear resistance and compactness, strong barrier ability, and relatively low price. Therefore, research and development of thermoplastic polyethylene coated film control with sulfur as the primer Fertilizer release can not only solve the problems of fragile and damaged sulfur film and unsatisfactory controlled nutrient release, but also effectively control production costs, which is conducive to its popularization and application in agricultural production

Method used

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  • Thermoplastic resin membrane wrapping control-releasing fertilizer using sulfur as base coat
  • Thermoplastic resin membrane wrapping control-releasing fertilizer using sulfur as base coat
  • Thermoplastic resin membrane wrapping control-releasing fertilizer using sulfur as base coat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1 Production of thermoplastic resin-coated controlled-release fertilizer products with sulfur as the base coat for 2 months of controlled-release period

[0024] (1) Preheat 1000kg of urea granules (1.5-5.0mm in diameter) to 75°C in a drum.

[0025] (2) Spray 100kg of liquid sulfur at a temperature of 140°C onto the moving urea particles, the liquid sulfur droplets spread evenly on the surface of the moving urea particles, and quickly solidify into a sulfur film, continuously spraying liquid sulfur, gradually forming a uniform and continuous sulfur film membrane.

[0026] (3) Dissolve 20kg of reclaimed polyethylene resin in 200kg of turpentine at 100°C, and add 10kg of starch to prepare a coating solution, spray the coating solution onto the moving sulfur-coated fertilizer particles in a drum, and heat it in 85°C hot air Driven by the driving force, the solvent sprayed on the surface of the moving sulfur-coated fertilizer is quickly volatilized and taken awa...

Embodiment 2

[0027] Example 2 Production of thermoplastic resin-coated controlled-release fertilizer with controlled-release period of 9 months

[0028] (1) Preheat 1000kg of compound fertilizer (15-15-15) particles (1.5-5.0mm) to 80°C in a drum.

[0029] (2) Spray 140kg of liquid sulfur at a temperature of 150°C onto the moving urea granules. The liquid sulfur mist spreads evenly on the surface of the moving urea granules and quickly solidifies into a sulfur film. Continuously spraying liquid sulfur gradually forms a uniform and continuous sulfur film. membrane.

[0030] (3) 30kg of reclaimed polyethylene resin is dissolved in 450kg of turpentine at 110°C to prepare a coating solution, and in a drum, the coating solution is sprayed onto the moving sulfur-coated fertilizer particles, driven by 95°C of hot air, The solvent sprayed on the surface of the moving sulfur-coated fertilizer is quickly volatilized and taken away, and the polyethylene resin is wrapped on the sulfur-coated fertilize...

Embodiment 3

[0031] Example 3 Production of thermoplastic resin-coated controlled-release fertilizer with a controlled-release period of 10 months

[0032] (1) Preheat 1000kg of ammonium sulfate, diammonium phosphate, and ammonium bicarbonate granular fertilizer to 80°C in a drum.

[0033](2) Spray 140kg of liquid sulfur at a temperature of 145°C on the moving urea particles, the liquid sulfur droplets spread evenly on the surface of the moving urea particles, and quickly solidify into a sulfur film, continuously spraying liquid sulfur, gradually forming a uniform and continuous sulfur film membrane.

[0034] (3) 40kg of reclaimed polyethylene resin is dissolved in 450kg of turpentine at 110°C to prepare a coating solution, and the coating solution is sprayed onto the moving sulfur-coated fertilizer particles in a drum, driven by 90°C of hot air, The solvent sprayed on the surface of the moving sulfur-coated fertilizer is quickly volatilized and taken away, and the polyethylene resin is w...

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Abstract

The invention discloses a thermoplastic resin coating controlled release fertilizer with sulfur as a bond layer, which consists of a granular fertilizer core with particle size to be 1.5mm to 5.5mm and a coating layer, wherein, the inner layer of the coating layer is a sulfur membrane, while the outer layer thereof is a thermoplastic resin membrane. The controlled release period is 1 to 12 months. The manufacture of the coating release fertilizer of the invention has the advantages of unique process and simple operation. Moreover, the controlled release fertilizer has good yield increasing effect and excellent controlled release property.

Description

technical field [0001] The invention relates to a thermoplastic resin-coated controlled-release fertilizer with sulfur as the base coat. Background technique [0002] my country's fertilizer consumption accounts for about 20-30% of the world's total fertilizer consumption, ranking first in the world. The average seasonal utilization rate of chemical fertilizers in developed countries is 50-60%, and the average seasonal utilization rate of chemical fertilizers in my country is only 30-35%. . The loss and waste of a large number of nutrients not only bring huge economic losses to the society, but also cause serious environmental pollution. At present, with the continuous increase in the amount of chemical fertilizers, the modification of fertilizers is even more important under the multiple goals of pursuing both yield and quality of agricultural products and environmental friendliness. Developing slow-release and controlled-release fertilizers to improve fertilizer utilizati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00C05G5/00
Inventor 万连步解玉洪李广涛
Owner KINGENTA ECOLOGICAL ENG GRP
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