CN106396841A - Method for preparing degradable controlled release fertilizer - Google Patents
Method for preparing degradable controlled release fertilizer Download PDFInfo
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- CN106396841A CN106396841A CN201610720746.9A CN201610720746A CN106396841A CN 106396841 A CN106396841 A CN 106396841A CN 201610720746 A CN201610720746 A CN 201610720746A CN 106396841 A CN106396841 A CN 106396841A
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- release fertilizer
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
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- Organic Chemistry (AREA)
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Abstract
The invention relates to a method for preparing a degradable controlled release fertilizer, the method comprises preparation of dry fertilizer granules, and the method is as follows: mixing, by weight, starch, hydroxylation modified lecithin, seaweed functional masterbatch and peanut oil to obtain a mixed liquid for standby use; spraying evenly the mixed liquid on the surface of the dry fertilizer granules by an air pressure spraying manner, and mixing and stirring the fertilizer granules and castor oil to obtain the degradable controlled release fertilizer. Coating matters used in the degradable controlled release fertilizer all can be biodegradable, and compared with use of various synthetic polymer adhesives as wrapping adhesive films in the prior art, the coating matters can make up for defects that synthetic polymers are non-biodegradable, and pollute soil and environment. The method has the advantages of being simple in process, convenient in operation, short in process cycle, low in energy consumption, non-waste, and is in line with the concept of green and environmental protection of atomic economy, and beneficial to the popularization and application of industrialization.
Description
Technical field
The invention belongs to technical field of fertilizer, more particularly, to a kind of reliable and stable, low cost, total nutrient is high, material therefor
Biodegradable, do not change the preparation method of the degradable controlled release fertilizer of soil environment.
Background technology
Chemical fertilizer occupies very important status in agricultural production.China is as a large agricultural country, right in agricultural production
The demand of chemical fertilizer is very high, and chemical fertilizer has become as maximum material investment in agricultural production according to statistics, accounts for whole productivitys and props up
50% about going out.The fertilizer production of China and usage amount are the first in the world, and wherein yield accounts for the 20% of world Fertilizer yield,
Usage amount has accounted for the 28% of world Fertilizer consumption.
However, the property due to chemical fertilizer and the requirement to soil environment, soil physical properties is then led to constantly to deteriorate,
So not only affect the raising of crops, and environment be also result in huge pollution.
Therefore, improve chemical fertilizer utilization ratio, reduce fertilising excessive, it is to avoid environmental pollution has become as Developing Sustainable Agriculture and compels
Be essential problem to be solved.Slow release fertilizer is also known as release and release control fertilizer（control release fertilizers）Just arise at the historic moment.
Slow release chemical fertilizer has following advantage：1）Reduce nutrient loss, improve chemical fertilizer utilization ratio.2）Make to cause plant in soil not
Can be reduced with biological fixation effect using the chemistry of form.3）The nitrogen unit decreasing denitrification and nitrogen nitrification and causing
Element loss.
However, existing slow release chemical fertilizer there are the following problems：1）Integument film forming matter mostly is synthesising macromolecule copolymer, is difficult
Biodegradable.2）Directly add chemical adhesive parcel, sustained release cycle is short or sustained release using pure starch or various plant straw powder
Speed is difficult to control to.3）Coating matter used expensive such as silane, titanate esters or Aluminate etc. coupling agent, high cost is unfavorable for
Large-scale promotion application.
Content of the invention
It is an object of the invention to, overcome the deficiencies in the prior art, a kind of reliable and stable, low cost be provided, total nutrient is high,
Material therefor is biodegradable, does not change the preparation method of the degradable controlled release fertilizer of soil environment.
To achieve these goals, the present invention employs the following technical solutions：
A kind of preparation method of degradable controlled release fertilizer, is dried chemical fertilizer granule including preparation, comprises the following steps：
1）By weight, by the starch of 100-120 part, 120-150 part hydroxylating modified lecithin, 50-60 part marine alga function
Master batch and 200 portions of peanut oil 120-150 DEG C, frequency be 85MHz ultrasonic vibration 60-75min, obtain mixing liquid, standby；
2）By step 1）The mixing liquid of preparation is being dried chemical fertilizer particle surface, spraying pressure using air-blast atomizing mode even application
Power is 0.55-0.65MPa, and temperature is cooled to 40-50 DEG C by the chemical fertilizer granule after being coated with；
3）By step 2）Chemical fertilizer granule after the coating obtaining and castor oil mix and blend, obtain degradable controlled release fertilizer.
In the technical program, with existing use amylan compared with powder timber residue manufacture slow-release fertilizer casing,
The present invention can make up because powder timber residue composition granule and space excessive to chemical fertilizer wrap up uneven, slow-release time is short and not easily-controllable
The deficiency of system.The step 2 of the present invention）Being coated on chemical fertilizer granule surface is the first clad, step 3）The clad of preparation is the
Two clads, the second clad like switching layer, by the moisture dissolution with hydrogen bond association in hydrophily group and extraneous soil,
The passage of outwards slow release is provided for chemical fertilizer, reaches the speed controlling chemical fertilizer release, thus obtaining controllable sustained release rate
Slow release chemical fertilizer.The method is applicable to the preparation of various water-soluble slow-releasing chemical fertilizer, and used by the first clad and the second clad
Material is completely biodegradable material, pollution-free to soil, does not change soil environment.
Preferably, step 2）Middle mixing liquid is 1.35-1.5 with the mass ratio that chemical fertilizer granule is dried:1.
Preferably, step 3）Chemical fertilizer granule after middle coating is 1 with the mass ratio of castor oil:3-4.2.
Preferably, step 3）Middle mixing speed is 2500-3000r/min, and temperature is 90-95 DEG C, and mixing time is 25-
35min.
Preferably, the particle diameter that chemical fertilizer granule is dried is 2-4.5mm.
Preferably, step 1）Described in the preparation method of hydroxylating modified lecithin be：Lecithin with concentration is
The lactic acid solution of 50-60wt% mixes rear heating stirring, and wherein said lecithin is 100 with the mass ratio of lactic acid solution:
(4-6), heating-up temperature is 70-80 DEG C, heat time 40-60min；It is gradually added into quality to reactant liquor during heating stirring
Concentration for described lecithin 20-25% is the hydrogen peroxide solution of 30wt%；Drip hydrogen-oxygen to reactant liquor after heating stirring terminates
Change sodium solution to neutral, hydroxylating modified lecithin after being finally vacuum dried, is obtained.
Preferably, in step 2）After end, by the dolomite dust of the chemical fertilizer granule after cooling and its quality 0.2-0.5%
Mix and blend 15min.
Preferably, step 1）In starch used be cornstarch, potato starch, wheaten starch, green starch or lotus root form sediment
Powder.
Preferably, step 1）The preparation method of middle marine alga functional agglomerate is as follows：Take bamboo powder and add to its 8-12 times of matter
The concentration of amount is in the sodium hydroxide solution of 8-12wt%, and after being uniformly dispersed, to 110-130 DEG C, 6- is discongested in insulation to heating under reduced pressure
8h；It is filtrated to get bamboo powder after discongesting, then concentration bamboo powder added to its 8-12 times of quality is in the ethanol solution of 70-80wt%,
It is incubated 3-5h after being heated to 80-90 DEG C, filtered again, insoluble matter is added water and pulls an oar, pulling an oar to slurry beating degree is
14-16 ° of SR, then carries out defibrination, defibrination to slurry beating degree be 18-22 ° of SR, wash after making beating and vacuum distillation after
To cellulose；Cellulose is added to the ionic liquid of its 18-22 times of quality, obtains cellulose solution；To cellulose solution
The middle seaweed extracted liquor adding its volume 0.4-0.6 times, is uniformly mixing to obtain mixed solution, then add in mixed solution etc.
The concentration of volume is the calcium chloride solution of 2-4wt%, after crosslinked 1-2h at 40-50 DEG C, in a low temperature of -18 DEG C to -22 DEG C of transfer
Frost 1-2 days, then takes out frost thing, is thawed with flowing water, prepared cellulose-calcium alginate hydrogel, then is entered with absolute ethyl alcohol
Row solvent is replaced, after eventually passing vacuum drying and grinding, prepared marine alga functional agglomerate.
The invention has the beneficial effects as follows：Manufacture slow-release fertilizer casing phase with existing use amylan with powder timber residue
Can make up because of powder timber residue composition granule than, the present invention and space is excessive chemical fertilizer is wrapped up uneven, slow-release time is short and not
Manageable deficiency.The step 2 of the present invention）Being coated on chemical fertilizer granule surface is the first clad, step 3）The clad of preparation
For the second clad, the second clad like switching layer, by the moisture in hydrophily group and extraneous soil with hydrogen bond association
Dissolution, provides the passage of outwards slow release, reaches the speed controlling chemical fertilizer release for chemical fertilizer, thus obtaining controllable sustained release speed
The slow release chemical fertilizer of rate.The method is applicable to the preparation of various water-soluble slow-releasing chemical fertilizer, and the first clad and the second clad
Material therefor is completely biodegradable material, pollution-free to soil, does not change soil environment.Coating used all can be given birth to
Thing is degraded, with existing do parcel glued membrane using various synthesis macromolecular adhesive compared with, can make up synthesis macromolecule can not be biological
Degraded, the deficiency to soil and environmental pollution.The process is simple of the present invention, easy to operate, technological cycle is short, and energy consumption is low,
And do not produce discarded object, meet the theory of atom economy environmental protection, beneficial to industrial application.
Specific embodiment
Technical scheme in the embodiment of the present invention will be carried out with clear, complete description below it is clear that described enforcement
Example is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is common
All other embodiment that technical staff is obtained under the premise of not making creative work, broadly falls into the model of present invention protection
Enclose.
Embodiment 1
A kind of preparation method of degradable controlled release fertilizer, is dried chemical fertilizer granule including preparation, and the particle diameter that chemical fertilizer granule is dried is 2-
4.5mm, comprises the following steps：
1）By weight, by 100 parts of wheaten starch, 120 parts of hydroxylating modified lecithin, 50 parts of marine alga functional agglomerates with
200 portions of corn oil 120 DEG C, frequency be 85MHz ultrasonic vibration 60min, obtain mixing liquid, standby；Hydroxylating modification lecithin
The preparation method of fat is：The lactic acid solution that lecithin is 60wt% with concentration mixes rear heating stirring, wherein said lecithin
Fat is 100 with the mass ratio of lactic acid solution:6, heating-up temperature is 80 DEG C, heat time 60min；During heating stirring to
Reactant liquor is gradually added into the hydrogen peroxide solution that the concentration that quality is described lecithin 25% is 30wt%；After heating stirring terminates to
Reactant liquor dropping sodium hydroxide solution, to neutral, is obtained hydroxylating modified lecithin after being finally vacuum dried；
The preparation method of marine alga functional agglomerate is as follows：Take bamboo powder and add the NaOH being 8wt% to the concentration of its 8 times of quality
In solution, after being uniformly dispersed, to 110 DEG C, 6h is discongested in insulation to heating under reduced pressure；It is filtrated to get bamboo powder after discongesting, then bamboo powder is added
Concentration to its 8 times of quality is in the ethanol solution of 70wt%, is incubated 3h, is filtered again, to insoluble matter after being heated to 80 DEG C
Add water and pulled an oar, pulling an oar to slurry beating degree is 14 ° of SR, then carries out defibrination, and defibrination to slurry beating degree is 18 ° of SR, beats
Wash after slurry and vacuum distillation after obtain cellulose；Cellulose is added to the ionic liquid of its 18 times of quality, obtains
Cellulose solution；Add the seaweed extracted liquor of 0.4 times of its volume in cellulose solution, be uniformly mixing to obtain mixed solution, so
Add, in backward mixed solution, the calcium chloride solution that isopyknic concentration is 2wt%, after crosslinked 1h at 40 DEG C, -18 DEG C of transfer
Freeze 1 day under low temperature, then take out frost thing, thawed with flowing water, prepared cellulose-calcium alginate hydrogel, then use anhydrous second
Alcohol carries out solvent displacement, after eventually passing vacuum drying and grinding, prepared marine alga functional agglomerate.
2）By step 1）The mixing liquid of preparation is being dried chemical fertilizer particle surface using air-blast atomizing mode even application, spray
Painting pressure be 0.55MPa, the chemical fertilizer granule after be coated with, temperature is cooled to 40 DEG C, by cool down after chemical fertilizer granule and its
The dolomite dust mix and blend 15min of quality 0.2%；Mixing liquid is 1.35 with the mass ratio that chemical fertilizer granule is dried:1
3）By step 2）Chemical fertilizer granule after the coating obtaining and castor oil mix and blend, mixing speed is 2500r/min, temperature
For 90 DEG C, mixing time is 25min, obtains degradable controlled release fertilizer；Chemical fertilizer granule after coating with the mass ratio of castor oil is
1:3.
Embodiment 2
A kind of preparation method of degradable controlled release fertilizer, is dried chemical fertilizer granule including preparation, and the particle diameter that chemical fertilizer granule is dried is 2-
4.5mm, comprises the following steps：
1）By weight, by 110 parts of green starch, 135 parts of hydroxylating modified lecithin, 55 parts of marine alga functional agglomerates with
200 portions of corn oil 130 DEG C, frequency be 85MHz ultrasonic vibration 65min, obtain mixing liquid, standby；Hydroxylating modification lecithin
The preparation method of fat is：The lactic acid solution that lecithin is 55wt% with concentration mixes rear heating stirring, wherein said lecithin
Fat is 100 with the mass ratio of lactic acid solution:5, heating-up temperature is 75 DEG C, heat time 50min；To anti-during heating stirring
Concentration that quality is described lecithin 22% is the hydrogen peroxide solution of 30wt% to answer liquid to be gradually added into；To anti-after heating stirring terminates
Answer drop hydro-oxidation sodium solution to neutral, hydroxylating modified lecithin after being finally vacuum dried, is obtained；
The preparation method of marine alga functional agglomerate is as follows：Take bamboo powder and add the hydroxide being 10wt% to the concentration of its 10 times of quality
In sodium solution, after being uniformly dispersed, to 120 DEG C, 7h is discongested in insulation to heating under reduced pressure；It is filtrated to get bamboo powder after discongesting, then bamboo powder is added
The concentration adding to its 11 times of quality is in the ethanol solution of 75wt%, is incubated 4h, is filtered again, to not after being heated to 85 DEG C
Molten thing adds water and is pulled an oar, and pulling an oar to slurry beating degree is 15 ° of SR, then carries out defibrination, and defibrination to slurry beating degree is 20 °
SR, wash after making beating and vacuum distillation after obtain cellulose；Cellulose is added to the ionic liquid of its 19 times of quality,
Obtain cellulose solution；Add the seaweed extracted liquor of 0.5 times of its volume in cellulose solution, be uniformly mixing to obtain mixing molten
Liquid, then adds the calcium chloride solution that isopyknic concentration is 2-4wt% in mixed solution, after crosslinked 1.5h at 45 DEG C, turns
Freeze 2 days in a low temperature of moving -20 DEG C, then take out frost thing, thawed with flowing water, prepared cellulose-calcium alginate hydrogel, then
Carry out solvent displacement with absolute ethyl alcohol, after eventually passing vacuum drying and grinding, prepared marine alga functional agglomerate；
2）By step 1）The mixing liquid of preparation is being dried chemical fertilizer particle surface, spraying pressure using air-blast atomizing mode even application
Power is 0.58MPa, and temperature is cooled to 45 DEG C by the chemical fertilizer granule after being coated with, by the chemical fertilizer granule after cooling and its quality
0.3% dolomite dust mix and blend 15min；Mixing liquid is 1.45 with the mass ratio that chemical fertilizer granule is dried:1
3）By step 2）Chemical fertilizer granule after the coating obtaining and castor oil mix and blend, mixing speed is 2800r/min, temperature
For 93 DEG C, mixing time is 28min, obtains degradable controlled release fertilizer；Chemical fertilizer granule after coating with the mass ratio of castor oil is
1:3.6.
Embodiment 3
A kind of preparation method of degradable controlled release fertilizer, is dried chemical fertilizer granule including preparation, and the particle diameter that chemical fertilizer granule is dried is 2-
4.5mm, comprises the following steps：
1）By weight, by 100 parts of Rhizoma Nelumbinis starch, 150 parts of hydroxylating modified lecithin, 60 parts of marine alga functional agglomerates and 200
Portion corn oil 150 DEG C, frequency be 85MHz ultrasonic vibration 75min, obtain mixing liquid, standby；Hydroxylating modified lecithin
Preparation method is：The lactic acid solution that lecithin and concentration are 50wt% mixes rear heating stirring, wherein said lecithin with
The mass ratio of lactic acid solution is 100:4, heating-up temperature is 70 DEG C, heat time 40min；To reactant liquor during heating stirring
It is gradually added into the hydrogen peroxide solution that the concentration that quality is described lecithin 20% is 30wt%；To reactant liquor after heating stirring terminates
Dropping sodium hydroxide solution, to neutral, is obtained hydroxylating modified lecithin after being finally vacuum dried；
The preparation method of marine alga functional agglomerate is as follows：Take bamboo powder and add the hydroxide being 12wt% to the concentration of its 12 times of quality
In sodium solution, after being uniformly dispersed, to 130 DEG C, 8h is discongested in insulation to heating under reduced pressure；It is filtrated to get bamboo powder after discongesting, then bamboo powder is added
The concentration adding to its 12 times of quality is in the ethanol solution of 80wt%, is incubated 5h, is filtered again, to not after being heated to 90 DEG C
Molten thing adds water and is pulled an oar, and pulling an oar to slurry beating degree is 16 ° of SR, then carries out defibrination, and defibrination to slurry beating degree is 22 °
SR, wash after making beating and vacuum distillation after obtain cellulose；Cellulose is added to the ionic liquid of its 22 times of quality,
Obtain cellulose solution；Add the seaweed extracted liquor of 0.6 times of its volume in cellulose solution, be uniformly mixing to obtain mixing molten
Liquid, then adds the calcium chloride solution that isopyknic concentration is 4wt% in mixed solution, after crosslinked 2h at 50 DEG C, transfer-
Freeze 2 days in a low temperature of 22 DEG C, then take out frost thing, thawed with flowing water, prepared cellulose-calcium alginate hydrogel, then use
Absolute ethyl alcohol carries out solvent displacement, after eventually passing vacuum drying and grinding, prepared marine alga functional agglomerate；
2）By step 1）The mixing liquid of preparation is being dried chemical fertilizer particle surface, spraying pressure using air-blast atomizing mode even application
Power is 0.65MPa, and temperature is cooled to 50 DEG C by the chemical fertilizer granule after being coated with, by the chemical fertilizer granule after cooling and its quality
0.5% dolomite dust mix and blend 15min；Mixing liquid is 1.5 with the mass ratio that chemical fertilizer granule is dried:1
3）By step 2）Chemical fertilizer granule after the coating obtaining and castor oil mix and blend, mixing speed is 3000r/min, temperature
For 95 DEG C, mixing time is 35min, obtains degradable controlled release fertilizer；Chemical fertilizer granule after coating with the mass ratio of castor oil is
1: 4.2.
It should be appreciated that to those skilled in the art, can be improved according to the above description or be become
Change, and all these modifications and variations all should belong to the protection domain of claims of the present invention.
Claims (9)
1. a kind of preparation method of degradable controlled release fertilizer, is dried chemical fertilizer granule including preparation it is characterised in that including following walking
Suddenly：
1）By weight, by the starch of 100-120 part, 120-150 part hydroxylating modified lecithin, 50-60 part marine alga function
Master batch and 200 portions of peanut oil 120-150 DEG C, frequency be 85MHz ultrasonic vibration 60-75min, obtain mixing liquid, standby；
2）By step 1）The mixing liquid of preparation is being dried chemical fertilizer particle surface, spraying pressure using air-blast atomizing mode even application
Power is 0.55-0.65MPa, and temperature is cooled to 40-50 DEG C by the chemical fertilizer granule after being coated with；
3）By step 2）Chemical fertilizer granule after the coating obtaining and castor oil mix and blend, obtain degradable controlled release fertilizer.
2. a kind of preparation method of degradable controlled release fertilizer according to claim 1 is it is characterised in that step 2）Middle mixing
Liquid is 1.35-1.5 with the mass ratio that chemical fertilizer granule is dried:1.
3. a kind of preparation method of degradable controlled release fertilizer according to claim 1 is it is characterised in that step 3）Middle coating
Chemical fertilizer granule afterwards is 1 with the mass ratio of castor oil:3-4.2.
4. a kind of preparation method of degradable controlled release fertilizer according to claim 1 is it is characterised in that step 3）Middle stirring
Speed is 2500-3000r/min, and temperature is 90-95 DEG C, and mixing time is 25-35min.
5. a kind of preparation method of the degradable controlled release fertilizer according to claim 1 or 2 or 3 is it is characterised in that drying kinetics
The particle diameter of fertile particle is 2-4.5mm.
6. a kind of preparation method of degradable controlled release fertilizer according to claim 1 is it is characterised in that step 1）Described in
The preparation method of hydroxylating modified lecithin be：The lactic acid solution that lecithin is 50-60wt% with concentration adds after mixing
Thermal agitation, wherein said lecithin is 100 with the mass ratio of lactic acid solution:(4-6), heating-up temperature is 70-80 DEG C, the heat time
40-60min；Being gradually added into, to reactant liquor, the concentration that quality is described lecithin 20-25% during heating stirring is 30wt%
Hydrogen peroxide solution；To reactant liquor dropping sodium hydroxide solution to neutral after heating stirring terminates, make after being finally vacuum dried
Obtain hydroxylating modified lecithin.
7. a kind of preparation method of degradable controlled release fertilizer according to claim 1 is it is characterised in that in step 2）Terminate
Afterwards, by the dolomite dust mix and blend 15min of the chemical fertilizer granule after cooling and its quality 0.2-0.5%.
8. a kind of preparation method of degradable controlled release fertilizer according to claim 1 is it is characterised in that step 1）In used
Starch is cornstarch, potato starch, wheaten starch, green starch or Rhizoma Nelumbinis starch.
9. a kind of preparation method of degradable controlled release fertilizer according to claim 1 is it is characterised in that step 1）Middle marine alga
The preparation method of functional agglomerate is as follows：Take bamboo powder and add to its 8-12 times of quality concentration be 8-12wt% NaOH molten
In liquid, after being uniformly dispersed, to 110-130 DEG C, 6-8h is discongested in insulation to heating under reduced pressure；It is filtrated to get bamboo powder after discongesting, then by bamboo powder
Adding to the concentration of its 8-12 times of quality is in the ethanol solution of 70-80wt%, is incubated 3-5h, enters again after being heated to 80-90 DEG C
Row filters, and insoluble matter is added water and pulls an oar, and pulling an oar to slurry beating degree is 14-16 ° of SR, then carries out defibrination, and defibrination is to slurry
Material beating degree be 18-22 ° of SR, wash after making beating and vacuum distillation after obtain cellulose；Cellulose is added to its 18-22
In the ionic liquid of times quality, obtain cellulose solution；The marine alga adding its volume 0.4-0.6 times in cellulose solution is extracted
Liquid, is uniformly mixing to obtain mixed solution, then adds the calcium chloride solution that isopyknic concentration is 2-4wt% in mixed solution,
After crosslinked 1-2h at 40-50 DEG C, freeze 1-2 days in a low temperature of -18 DEG C to -22 DEG C of transfer, then take out frost thing, use flowing water
Thaw, prepared cellulose-calcium alginate hydrogel, then carry out solvent displacement with absolute ethyl alcohol, eventually pass vacuum drying and grind
After mill, prepared marine alga functional agglomerate.
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| CN201610720746.9A CN106396841A (en) | 2016-08-25 | 2016-08-25 | Method for preparing degradable controlled release fertilizer |
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| CN201610720746.9A CN106396841A (en) | 2016-08-25 | 2016-08-25 | Method for preparing degradable controlled release fertilizer |
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ID=58004743
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103539526A (en) * | 2013-09-29 | 2014-01-29 | 济南大学 | Slow-release chemical fertilizer with composite layer and preparation method thereof |
| CN105332158A (en) * | 2015-10-30 | 2016-02-17 | 浙江真爱毯业科技有限公司 | Production method for antistatic Raschel blanket |
-
2016
- 2016-08-25 CN CN201610720746.9A patent/CN106396841A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103539526A (en) * | 2013-09-29 | 2014-01-29 | 济南大学 | Slow-release chemical fertilizer with composite layer and preparation method thereof |
| CN105332158A (en) * | 2015-10-30 | 2016-02-17 | 浙江真爱毯业科技有限公司 | Production method for antistatic Raschel blanket |
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Application publication date: 20170215 |