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Fertilizer coated with resin, and its prodn. method

A technology of resin coating and fertilizer, applied in the direction of fertilizer form, fertilizer mixture, fertilization device, etc., can solve the problem of non-recycling and achieve the effect of reducing pollution

Active Publication Date: 2006-09-13
汉枫缓释肥料(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because they contain degradable starch, these coated fertilizers can be broken into fragments or fine particles after being applied to the soil, and these fragments or fine particles are still non-degradable and cannot be recycled

Method used

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  • Fertilizer coated with resin, and its prodn. method
  • Fertilizer coated with resin, and its prodn. method

Examples

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Embodiment Construction

[0024] In this example, the JFB-100 boiling spray coating tower of Jiangsu Keyu Drying Equipment Co., Ltd. is used to dissolve aliphatic polyester and polylactic acid polymer in dichloromethane and ethanol with a mixing ratio of 1:1. In the mixed solvent, powdery fillers are added at the same time to prepare the coating solution. When the proportion of the powdery filler increases, the dissolution rate of the fertilizer components increases, the degradation time of the coating will also be shortened, and the mechanical strength of the coated fertilizer will decrease. , so the addition ratio of powdery filler cannot exceed 60%, its particle size is controlled at less than or equal to 1 / 4 of the film thickness, and it is uniformly dispersed in the coating liquid. Measure 3 kilograms of coating solution, wherein the content of degradable resin film material is 12%; weigh 5 kilograms of granular fertilizers with a particle size of 2 to 4 mm, and the granular fertilizers can be urea...

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Abstract

A biodegradable resin layer coated granular fertilizer is composed of a fertilizer particle and a coated layer of biodegradable resin which contains aliphatic polyester and polylactic polymer. Its preparing process includes such steps as preparing coating liquid by dissolving said aliphatic polyester and polylactic polymer in solvent and adding powdered filler, sieving the granular fertilizer, regulating the fluidizing pressure to make the fertilizer particles in ebullition state, coating and baking.

Description

technical field [0001] The invention relates to a coated fertilizer and a preparation method thereof, in particular to a biodegradable resin coated fertilizer and a manufacturing method thereof. Background technique [0002] Among the current controlled-release fertilizer products, mainly the thermosetting resin-coated fertilizer of SCOTTS Company in the United States, the famous brand is OSMOCOTE®, and the thermoplastic resin-coated fertilizer of Nippon Suso Corporation, the famous brand is MEISTER® as typical representatives. Both use polymer resin materials to evenly coat the surface of granular fertilizers, and adjust the release rate of fertilizer nutrients through the pore size and number of membranes, and are not affected by other environmental conditions such as acidity, alkalinity, moisture, and microorganisms except for temperature. . It is precisely because the nutrient release of this kind of fertilizer is affected by the tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G5/00
Inventor 吕云峰
Owner 汉枫缓释肥料(江苏)有限公司