CN106957504B - A kind of preparation method of fry starch of konjak coated fertilizer - Google Patents
A kind of preparation method of fry starch of konjak coated fertilizer Download PDFInfo
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- CN106957504B CN106957504B CN201710226337.8A CN201710226337A CN106957504B CN 106957504 B CN106957504 B CN 106957504B CN 201710226337 A CN201710226337 A CN 201710226337A CN 106957504 B CN106957504 B CN 106957504B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/02—Homopolymers or copolymers of unsaturated alcohols
- C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2329/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2329/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2329/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2499/00—Characterised by the use of natural macromolecular compounds or of derivatives thereof not provided for in groups C08J2401/00 - C08J2407/00 or C08J2489/00 - C08J2497/00
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
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- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
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Abstract
The invention belongs to fertilizer preparation technical fields.A kind of preparation method of fry starch of konjak coated fertilizer, it is characterized in that including the following steps: 1) according to fry starch of konjak: polyvinyl alcohol: water: proportion=3 of glycerol~12g:15g:300g:9g chooses raw material；2) polyvinyl alcohol, water, the glycerol chosen pour into kneader；3) fry starch of konjak is added, and obtains mixture；4) mixture that the Screw Extrusion step 3) of kneader obtains, polyethylene pallet are held, and curtain coating allows the evenly laid out pallet of solution immediately；5) pallet by step 4) equipped with mixture 50~80 DEG C forced air drying 2~3 hours, the mixture in pallet forms film；6) film is taken off to get the film arrived with a thickness of 0.12~0.2 millimeter；7) film is cut, and coat fertilizer material bag is made in edge sealing；8) carry out fertilizer it is filling after, seal to get needs fry starch of konjak coated fertilizer.This method can solve the problems, such as that fry starch of konjak deep process technology lacks, and provide batch production technology for the production of fry starch of konjak coated fertilizer.
Description
Technical field
The invention belongs to fertilizer preparation technical fields, and in particular to a kind of preparation method of fry starch of konjak coated fertilizer.
Background technique
Slow release fertilizer can adjust the rate of release of fertilizer nutrient according to crop growth demand, to improve fertilizer
Utilization rate reduces the destruction of fertilizer loss, environmental pollution and aquatic ecosystem.China's fertilizer consumption is more than 5.1 hundred million tons every
Year, but the utilization rate of fertilizer only 35%.Utilization rate of fertilizer is low to not only result in the wasting of resources, at the same can bring soil, Ecology,
The air even irreversible problem of food chain too many levels.The low important factor in order of utilization rate of fertilizer is the shortage of water resource,
China's dry cropland accounts for the 56.8% of total area under cultivation, about 7.39 hundred million hm2It needs to pour, therefore, the exploitation of moisture-retention sustained release fertilizer
With using being that fertilizer is promoted to subtract the important technology approach applied, basic contribution will be made to national " two subtract " strategic objective is completed.
For this purpose, subtracting for fertilizer applies research with slow release fertilizer in industries and related fieldss such as China's agricultural, Production of manure industry
It is concerned, experience development in more than 40 years, the slow release fertilizer that China develops has obtained plentiful and substantial progress, and slow release fertilizer improves
The utilization rate of fertilizer, while the degradation rate of membrane material brings new environment puzzlement.
Fry starch of konjak is the leftover bits and pieces in konjaku process, accounts for about the 60% of fine powder yield.It is limited to that smell is pungent, mouth
Induct the features such as puckery, nutrition composition content is low, additional processing cost is high, fry starch of konjak is few in food and industrial circle application, often
It is inexpensively handled as feed and compost.China is the maximum plantation state of konjaku and fine powder producing country in the world, as konjaku is processed
The fast-developing of industry grows, and fry starch of konjak amount to be processed increases severely, and compost has resulted in serious pollution to ecological environment, suitable
Deep process technology exploitation is extremely urgent.Fry starch of konjak includes starch, Glucomannan and crude fibre etc., is valuable macromolecule money
Source, it is the natural polymer for preparing membrane material and water-absorbent material that wherein starch, Glucomannan, which have film forming and water imbibition simultaneously,
Sub- material；Glucomannan especially therein plays the role of inhibiting starch retrogradation, is film-made being blended using polyvinyl alcohol as main component
In technique, preferable the comixing compatibility for improving starch and polyvinyl alcohol of the participation of Glucomannan, the slow release of film, mechanicalness
It can be more uniform and stable.
Summary of the invention
The purpose of the present invention is to provide a kind of preparation method of fry starch of konjak coated fertilizer, this method can solve konjaku and fly
Powder deep process technology lack problem, for fry starch of konjak coated fertilizer production batch production technology is provided, film uniformity is good, toughness with
Intensity is big.
To achieve the above object, the technical solution used in the present invention is: a kind of preparation side of fry starch of konjak coated fertilizer
Method, it is characterized in that including the following steps:
1) according to fry starch of konjak: polyvinyl alcohol: water: proportion=3 of glycerol~12g:15g:300g:9g chooses raw material；
2) polyvinyl alcohol, water, the glycerol of step 1) selection pour into kneader, and set temperature is 95 DEG C, mixing speed 60r/
Min opens heating, stirring, and the time is 3 hours, obtains mixture A；
3) fry starch of konjak that step 1) is chosen is added in the mixture A of step 2), continues stirring 0.5 hour, is mixed
Object B；
4) the mixture B that the Screw Extrusion step 3) of kneader obtains, polyethylene pallet are held, and curtain coating makes solution equal immediately
Even tiling pallet；
5) pallet by step 4) equipped with mixture 50~80 DEG C forced air drying 2~3 hours, mixture shape in pallet
Film forming；
6) by step 5) pallet and film at room temperature cool down after take off film to get to a thickness of 0.12~0.2 millimeter film (or
Fly powder and polyvinyl alcohol blending film)；
7) coat fertilizer material bag is made using sealing machine edge sealing in the size for being cut to need to the film that step 6) obtains；
8) to the coating bag after step 7) preparation carry out fertilizer (or addition water-retaining agent etc.) it is filling after, then use sealing machine
Seal the fry starch of konjak coated fertilizer to get needs.
In step 1), according to fry starch of konjak: polyvinyl alcohol: water: proportion=3 of glycerol~9g:15g:300g:9g chooses former
Material.
In step 1), the degree of polymerization of the polyvinyl alcohol of selection is 1750 or more, and the degree of polymerization is too small, and the film water prepared is molten
Property is too strong, does not have the effect of sustained release.
In step 1), the mass ratio of fry starch of konjak and polyvinyl alcohol is between 0.2~0.8, at the beginning of the slow release fertilizer of preparation
Phase dissolution rate range 1.64%~2.57%.Winged powder additive amount is bigger, then the speed of membrane degradation is faster, is sustained stronger.
In step 4), solution curtain coating thickness is suitable with 900-1300 grams/m in pallet, available with a thickness of 0.12
~0.2 millimeter of film；
In step 7), it can need to cut according to fertilising technique with filling 1 kilogram of fertilizer every about square metre area film
For inner wrapping bag with fertilizer.
In step 7), such as mix water-retaining agent, then the filling amount of water-retaining agent be sack volume 1% within (i.e. fertilizer: water conservation
The volume ratio of agent is 100:1).
Step 7) film is cut to strip or piece type, and 2 sides, the 3rd side open-ended are sealed after doubling.
In step 7), the fertilizer is one of urea, ammonium hydrogen carbonate etc..
This method be particularly suitable for urea, ammonium hydrogen carbonate etc. are light-exposed, the slow release fertilizer for the volatile fertilizer that is heated preparation.This hair
Brown is presented in bright product, has interception, and the slow release fertilizer for being especially suitable for photolysis type prepares (such as ammonium hydrogen carbonate).
The beneficial effects of the present invention are: the 1, present invention uses fry starch of konjak and polyvinyl alcohol blending, thermoplastic sealing preparation packet
Film bag with fertilizer, be blended with Starch-Polyvinyl Alcohol, compared with the prior art of coating machine coating: 1) group partition inter-capacitive is high, sustained release effect
Fruit is more preferable；2) coating rate height, coating quantity can be precisely controlled；3) without dry link after coating, fertilizer is without heat loss；4) by coating
Binder granulation, non-environmental-pollution are not needed between fertilizer components；5) water-retaining agent can be freely combined；6) adjusting of film thickness is controllable
Membrane material mechanical strength, does not influence slow release effect.
2, the foundation of the fry starch of konjak coated fertilizer production technology, make full use of in fry starch of konjak by-product Glucomannan and
This two big excellent macromolecule component of starch, and and polyvinyl alcohol blending.Membrane component ratio, curtain coating, drying, film are cut, heat
The techniques such as plastic packaging mouth, fertilizer is filling and parameter are described in detail.Especially fly powder dosage, curtain coating amount and area, film seals
Range restriction has been carried out with canning means, the filling limitation of water-retaining agent, membrane area and filling amount.Coat fertilizer material bag can be made as needed
It is standby at various shapes (strip, bulk, sheet), product provides field crop, afforestation, checks winds and fixes drifting sand, family potted plant etc.
Fertilizer base applies, imposes and the application of water-retaining agent.This blended liquid equally can pass through spiral shell using after being blended with fertilizer, water-retaining agent
Bar extruding is prepared into rodlike slow release fertilizer.
3, film uniformity is good, and toughness and intensity are big.
4, this method can solve the problems, such as that fry starch of konjak deep process technology lacks, and provide factory for fry starch of konjak coated fertilizer
Change production technology.Film is blended in fry starch of konjak, polyvinyl alcohol, glycerol by the present invention, carries out thermoplastic sealing to film and coat fertilizer is made
Material bag, can be to avoid granulation of fertilizer process and granulation adhesive residue problem, and avoids fertilizer in coating process and coating
Thermal decomposition loss in drying process afterwards.Fry starch of konjak and polyvinyl alcohol ratio can be with control accurate films to the slow release speed of fertilizer
And degradation speed, and degradability is more preferable.The exploitation of this product has broad application prospects in slow release fertilizer field.
Detailed description of the invention
Fig. 1 is flow chart of the invention.
Fig. 2 is several membrane material degradation figures of the invention.
Fig. 3 is fry starch of konjak and polyvinyl alcohol blending membrane material degradation figure of the invention.
Fig. 4 is the degradation of fry starch of konjak and polyvinyl alcohol blending film and starch and polyvinyl alcohol blending film of the invention
Figure.
Fig. 5 is the coating bag figure of fry starch of konjak and polyvinyl alcohol blending preparation of the invention.
Fig. 6 is coated fertilizer figure of the invention.
Fig. 7 is the scanning electron microscope (SEM) photograph after fry starch of konjak and polyvinyl alcohol blending membrane degradation of the invention.
Fig. 8 is the scanning electron microscope (SEM) photograph after starch and polyvinyl alcohol blending membrane degradation.
Fig. 9 is the scanning electron microscope (SEM) photograph after polyvinyl alcohol membrane degradation of the invention.
Specific embodiment
For a better understanding of the present invention, below with reference to the embodiment content that the present invention is furture elucidated, but it is of the invention
Content is not limited solely to the following examples.
Embodiment 1: winged powder is with polyvinyl alcohol blending film, starch compared with the mechanical performance of polyvinyl alcohol blending film
As shown in Figure 1, a kind of preparation method of konjaku coated fertilizer, includes the following steps:
1) 3 parts of fry starch of konjak are taken, respectively 3 grams, 6 grams, 9 grams.5 parts of polyvinyl alcohol, 15 grams every part.5 parts of water, every part 300
Milliliter (i.e. 300g).5 parts of glycerol, 9 grams every part.1 part of starch, quality is 6 grams.Need sample such as the following table 1 to be prepared.
1 each sample component proportion of table and performance
2) 1 part of polyvinyl alcohol, 1 part of water and 1 part of glycerol (i.e. serial number 1 in the table 1) three that step 1) is chosen are poured into burning
Cup, the water bath condition of beaker are 95 DEG C of temperature, heating time 180min；
3) after step 2), the 1st part of fry starch of konjak (i.e. serial number 1 in table 1) is poured into beaker, stirring, heating, after
It is 30 minutes continuous；
4) mixture for obtaining step 3) pours into 15cm*15cm pallet (polyethylene pallet), 20 grams of every disk, about 16 disks.
Tiling is shaken up to try to get to the heart of a matter；
5) the tiled pallet of step 4) is put into convection oven dry, and temperature is 55 DEG C, drying time about 3 hours；
The same step 1) -5 of preparation method of No. 2-5 (i.e. serial number 2-5) sample), formula is sampled according to table 1.
6) it takes the dried film of step 5) (flying powder and polyvinyl alcohol blending film) off, and is cut into 3*3cm, each sample
10 are cut altogether, Water absorption and puncture force to be determined；
7) coat fertilizer material bag is made using sealing machine edge sealing in the size for being cut to need to the film that step 6) obtains；
5 films that step 6) is cut are taken, it is 1 hour dry in 55 DEG C of baking ovens, it weighs monolithic quality and is denoted as M0.By 5
Film is immersed in distilled water, is taken out after 24 hours, and it is water stain to wipe dry surface, then is weighed monolithic quality and be denoted as M1.Water absorption=(M1-
M0)/M0.Take Water absorption of 5 average values as the formulation samples.
8) to the coating bag after step 7) preparation carry out fertilizer (or addition water-retaining agent etc.) it is filling after, then use sealing machine
Seal the fry starch of konjak coated fertilizer to get needs.
The film for taking step 7) to absorb water 24 hours, wipes dry water stains, using the puncture force of TPA (Texture instrument) measurement film.In texture
TPA mode, P/2N probe are selected on instrument.Test parameter is as follows: correction height 5mm, speed 1.5mm/s, test speed before testing
10mm/s, speed 1.5mm/s after test.It is averaged.Testing peak maximum is puncture force, characterizes the intensity of membrane sample.Take 5
Puncture force of the average value of secondary measurement as the formulation samples.
Seen from table 1, when fry starch of konjak additive amount proportion is 0.2-0.6:1, the Water absorption range of film is 0.52-
0.65g/g, the puncture force range of film are 0.054-0.066N, and when starch additive amount proportion is 0.4:1, the Water absorption of film,
Puncture force is respectively 0.57g/g and 0.05N.Compared with starch, the winged powder of same ratio is added, and the Water absorption of film is slightly higher, but
Puncture force is higher.This illustrates that the film uniformity for flying powder addition is good, and toughness and intensity are big.
Embodiment 2: fly powder-polyvinyl alcohol blending compared with the membrane degradation performance of starch blending
By film is prepared according to the formula in table 1, method is the same as step 1)-step 5) in example 1.It is cut into 8.5*5.5cm, each
Formula cuts 12, is embedded in yellow soil natural degradation 12 months.Soil depth is 10cm.It periodically takes out every month respectively with quadrat sampling
It product 1, is gone mouldy, breakage is taken pictures and scanning electron microscope Microstructure observation.2nd month result of taking pictures see Fig. 2, Fig. 3,
The scanning result of Fig. 4 and sample segment such as Fig. 7, Fig. 8, Fig. 9.Fig. 2, Fig. 3, Fig. 4 fly powder and polyvinyl alcohol blending membrane degradation performance
It is apparently higher than starch and polyvinyl alcohol blending film, polyvinyl alcohol film.Fig. 7, Fig. 8, Fig. 9 illustrate that flying powder and polyvinyl alcohol blending film goes out
Gap after now degrading, and the variation of other two film is little.
From Figure 2 it can be seen that the membrane sample (serial number 1-3 in table 1) of 0.2-0.6:1 ratio has certain water imbibition, with soil knot
Close close, presentation yellow.The sample of 3 ratios sees mildew and damaged hole.Mildew and hole area increase with ratio and
Increase and more.And membrane sample (serial number 4-5 in table 1) water imbibition of 0:1, ST:1 ratio is poor, does not combine soil, color presents transparent
Color and white.Do not see mildew caused by any degradation and breakage, illustrates not degrading also for 2 months.Fly powder addition
Film slightly have certain water imbibition, be more advantageous to biodegrade, degradation starts from 1st month, has holes at 2nd month.
It takes 3,4 to close on breakage part film fragment and No. 5 samples is scanned Electronic Speculum observation, such as Fig. 7-9 as it can be seen that No. 3
Intensive and deep hole is presented in (0.6:1 formula), and No. 4 are presented sparse and plain hole.And No. 5 (ST:1 formula) only occur
Part protrusion, film is without hole.This result also illustrates that winged powder addition degradability is better than what starch added, and pure polyethylene film degradability
Difference.
Embodiment 3: fly powder-polyvinyl alcohol blending compared with starch blending coated fertilizer sustained release performance
By preparing film, step 1)-step 5) of the method with example 1 according to the formula in table 1.Film is opened, every film is diagonally cut
At 2.It is diagonal again to fold, 1 side is sealed with sealing machine, pours into 5 grams of urea, is sealed, coat fertilizer material bag and coated fertilizer such as Fig. 5-6.
The coated fertilizer prepared is put into the beaker equipped with 100 milliliters of distilled water, and beaker is placed in 25 DEG C of thermostatic water-baths, packet
Fertilizer slow release in film discharges in the distilled water into beaker, and acquisition time is 28 days.Respectively release the 24th hour, 4 days, 8 days,
10 milliliters of buffer solutions are taken from beaker within 12 days, 16 days, 20 days, 24 days and 28 days, and supplement in 10 milliliters of distilled water immediately, with
Maintain total volume constant.Soluble ammonium state nitrogen content in buffer solutions, and the content converted as the sustained release phase are measured, evaluation difference is matched
The effect of square slow-release nitrogen fertilizer.
Soluble ammonium state nitrogen content result such as table 2.No. 1-3 soluble ammonium nitrogen sustained release amount difference being formulated in 24 hours is not
Greatly, but 28 days sustained release amount significant differences.75% sustained release amount of national standard is far not achieved in 4 and 5 formulas.And fly the 1- of powder addition
No. 3 30% or more formula sustained release amounts, effect are got well than pure polyvinyl alcohol and Starch-Polyvinyl Alcohol are blended.
The sustained release situation (soluble ammonium state nitrogen content) of the urea of 2 different formulations coat fertilizer material bag of table
Embodiment 4: a kind of preparation method of konjaku coated fertilizer includes the following steps:
1) according to fry starch of konjak: polyvinyl alcohol: water: the proportion of glycerol=12g:15g:300g:9g chooses raw material；
2) polyvinyl alcohol, water, the glycerol of step 1) selection pour into kneader, and set temperature is 95 DEG C, mixing speed 60r/
Min opens heating, stirring, and the time is 3 hours, obtains mixture A；
3) fry starch of konjak that step 1) is chosen is added in the mixture A of step 2), continues stirring 0.5 hour, is mixed
Object B；
4) the mixture B that the Screw Extrusion step 3) of kneader obtains, polyethylene pallet are held, and curtain coating makes solution equal immediately
Even tiling pallet；
5) pallet by step 4) equipped with mixture 80 DEG C forced air drying 2 hours, the mixture in pallet forms film；
6) film is taken off after cooling down step 5) pallet and film at room temperature to get the film arrived with a thickness of 0.12~0.2 millimeter；
7) coat fertilizer material bag is made using sealing machine edge sealing in the size for being cut to need to the film that step 6) obtains；
8) to the coating bag after step 7) preparation carry out fertilizer (or addition water-retaining agent etc.) it is filling after, then use sealing machine
Seal the fry starch of konjak coated fertilizer to get needs.The Water absorption of film is 0.66g/g, and the puncture force range of film is 0.052N,
The bound of each raw material cited by the present invention and each raw material of the present invention, section value and technological parameter
Bound, the section value of (such as temperature, time) can realize the present invention, embodiment numerous to list herein.
Claims (5)
1. a kind of preparation method of fry starch of konjak coated fertilizer, it is characterized in that including the following steps:
1) according to fry starch of konjak: polyvinyl alcohol: water: proportion=3 of glycerol~9g:15g:300g:9g chooses raw material；
2) polyvinyl alcohol, water, the glycerol of step 1) selection pour into kneader, and set temperature is 95 DEG C, mixing speed 60r/min,
Heating, stirring are opened, the time is 3 hours, obtains mixture A；
3) fry starch of konjak that step 1) is chosen is added in the mixture A of step 2), continues stirring 0.5 hour, obtains mixture B；
4) the mixture B that the Screw Extrusion step 3) of kneader obtains, polyethylene pallet are held, and curtain coating allows solution uniformly to put down immediately
Spread pallet；Solution curtain coating thickness is suitable with 900-1300 grams/m in pallet；
5) pallet by step 4) equipped with mixture 50~80 DEG C forced air drying 2~3 hours, the mixture in pallet is formed
Film；
6) film is taken off after cooling down step 5) pallet and film at room temperature to get the film arrived with a thickness of 0.12~0.2 millimeter；
7) coat fertilizer material bag is made using sealing machine edge sealing in the size for being cut to need to the film that step 6) obtains；
8) to step 7) preparation after coating bag carry out fertilizer it is filling after, then using sealing machine seal to get needs konjaku
Fly powder coated fertilizer.
2. a kind of preparation method of fry starch of konjak coated fertilizer according to claim 1, it is characterized in that: in step 1), choosing
The degree of polymerization of the polyvinyl alcohol taken is 1750 or more.
3. a kind of preparation method of fry starch of konjak coated fertilizer according to claim 1, it is characterized in that: in step 7), often
Square metre filling 1 kilogram of the fertilizer of area film needs to be cut to inner wrapping bag with fertilizer according to fertilising technique.
4. a kind of preparation method of fry starch of konjak coated fertilizer according to claim 1, it is characterized in that: in step 7), packet
Film bag adds water-retaining agent, and the filling amount of water-retaining agent is within the 1% of sack volume.
5. a kind of preparation method of fry starch of konjak coated fertilizer according to claim 1, it is characterized in that: in step 7), institute
Stating fertilizer is one of urea, ammonium hydrogen carbonate.
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| CN201710226337.8A CN106957504B (en) | 2017-04-08 | 2017-04-08 | A kind of preparation method of fry starch of konjak coated fertilizer |
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| CN201710226337.8A CN106957504B (en) | 2017-04-08 | 2017-04-08 | A kind of preparation method of fry starch of konjak coated fertilizer |
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| CN106396874A (en) * | 2016-08-29 | 2017-02-15 | 贵阳开磷化肥有限公司 | Preparation method of slow release fertilizer used for corn plantation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8927617B2 (en) * | 2008-06-30 | 2015-01-06 | Kimberly-Clark Worldwide, Inc. | Fragranced water-sensitive film |
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2017
- 2017-04-08 CN CN201710226337.8A patent/CN106957504B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1528717A (en) * | 2003-10-16 | 2004-09-15 | 华东理工大学 | A coating agent for slow-release fertilizer |
| CN1587235A (en) * | 2004-08-09 | 2005-03-02 | 沈阳农业大学 | Film coated control releasing lawn special fertilizer and its producing method |
| KR20090032621A (en) * | 2007-09-28 | 2009-04-01 | 리트머스화학 주식회사 | Biodegradable Films with Phosphoric Acid / Hypropylpropyl Crosslinked Starch |
| CN106396874A (en) * | 2016-08-29 | 2017-02-15 | 贵阳开磷化肥有限公司 | Preparation method of slow release fertilizer used for corn plantation |
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