CN111171426A - Mulching film weed control master batch and preparation method thereof - Google Patents
Mulching film weed control master batch and preparation method thereof Download PDFInfo
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- CN111171426A CN111171426A CN202010016428.0A CN202010016428A CN111171426A CN 111171426 A CN111171426 A CN 111171426A CN 202010016428 A CN202010016428 A CN 202010016428A CN 111171426 A CN111171426 A CN 111171426A
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
- A01G13/02—Protective coverings for plants; Coverings for the ground; Devices for laying-out or removing coverings
- A01G13/0256—Ground coverings
- A01G13/0268—Mats or sheets, e.g. nets or fabrics
- A01G13/0275—Films
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/34—Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/18—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group —CO—N<, e.g. carboxylic acid amides or imides; Thio analogues thereof
- A01N37/22—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group —CO—N<, e.g. carboxylic acid amides or imides; Thio analogues thereof the nitrogen atom being directly attached to an aromatic ring system, e.g. anilides
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- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/18—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group —CO—N<, e.g. carboxylic acid amides or imides; Thio analogues thereof
- A01N37/26—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group —CO—N<, e.g. carboxylic acid amides or imides; Thio analogues thereof containing the group; Thio analogues thereof
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- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
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- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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Abstract
An agricultural mulching film weed-killing master batch and a preparation method thereof are composed of raw materials such as a weed-killing medicament, polyethylene, EVA, a stabilizer, a plasticizer, a slow release agent, an antioxidant, a light stabilizer and the like; the weed control mulching film prepared from the mulching film weed control master batch enriches the application functions of common mulching films, has the functions of weed control and disinsection besides the functions of warming and water retention, can save a large amount of labor for weed control, can not generate the conditions that weeds compete for water, fertilizer and growth space with crops because the young weeds are killed when budding, and effectively promotes the yield and income increase of the crops. The weed control mulching film prepared from the mulching film weed control master batch has an excellent weed control function, saves a large amount of labor for removing weeds in a farmland, and does not need to spray weed control pesticide on the farmland, so that the natural environment is protected.
Description
Technical Field
The invention relates to the technical field of agricultural mulching films, in particular to a mulching film weed control master batch and a preparation method thereof.
Background
The agricultural mulching film produced by adopting polyethylene raw materials through a blow molding process is used for covering crops, has the effects of preserving heat, retaining water and preventing fertilizer loss, and can promote the yield increase of the crops. However, the mulching of the mulching film is beneficial to the growth of crops, conditions are created for the growth of weeds in the field, the weeds compete for water, fertilizer and growth space with the crops, the weeds under the mulching film are difficult to remove, the weed control pesticide is sprayed before the mulching, time and labor are wasted, the ecological environment is damaged, and the weeds are not grown yet, so that the effect is very little.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a mulching film weed-killing master batch and a preparation method thereof.
In order to achieve the purpose, the invention is realized by the following technical scheme:
an agricultural mulching film weed control master batch comprises the following raw materials in parts by weight: 15-30 parts of a weed control agent, 50-60 parts of polyethylene, 10-15 parts of EVA (ethylene vinyl acetate), 2-5 parts of a stabilizer, 0.1-0.3 part of a plasticizer, 10-25 parts of a slow release agent, 0.5-1 part of an antioxidant, 1-3 parts of a light stabilizer, 0.5-1.5 parts of a colorant and 2-3 parts of a dispersing agent;
wherein the stabilizer is 8901 emulsifier;
the plasticizer is epoxy resin;
the slow release agent is talcum powder and/or nano calcium carbonate;
the antioxidant is antioxidant B215 and/or antioxidant B225;
the light stabilizer is one or two of light stabilizer 622, light stabilizer 944 or light stabilizer 783;
the dispersing agent is polyethylene wax.
Preferably, the feed consists of the following raw materials in parts by weight: 20-25 parts of a weed control medicament, 52-58 parts of polyethylene, 12-15 parts of EVA (ethylene vinyl acetate), 3-4 parts of a stabilizer, 0.1-0.2 part of a plasticizer, 15-20 parts of a slow release agent, 0.6-0.8 part of an antioxidant, 1.5-2.5 parts of a light stabilizer, 0.8-1.2 parts of a colorant and 2.4-2.8 parts of a dispersant.
Preferably, the herbicide is one, two or three of s-metolachlor, acetochlor or pretilachlor.
Preferably, the dispersant is a low molecular weight polyethylene wax.
Preferably, the polyethylene is a linear polyethylene.
Preferably, the colorant is a red, green or white pigment.
Preferably, the light stabilizer is light stabilizer 622.
Preferably, the slow release agent is nano calcium carbonate.
The invention also comprises a preparation method of the agricultural mulching film weed-killing master batch, which comprises the following steps: adding 15-30 parts by weight of a herbicide and 50-60 parts by weight of polyethylene into a high-speed mixer, uniformly mixing, adding 10-15 parts by weight of EVA, 2-5 parts by weight of a stabilizer, 0.1-0.3 part by weight of a plasticizer, 10-25 parts by weight of a slow release agent, 0.5-1 part by weight of an antioxidant, 1-3 parts by weight of a light stabilizer, 0.5-1.5 parts by weight of a colorant and 2-3 parts by weight of a dispersant, continuously stirring and uniformly mixing to obtain a mixture, and extruding and granulating the mixture in a parallel double-screw granulator to obtain an agricultural mulching film weed control master batch;
wherein the stabilizer is 8901 emulsifier;
the plasticizer is epoxy resin;
the slow release agent is talcum powder and/or nano calcium carbonate;
the antioxidant is antioxidant B215 and/or antioxidant B225;
the light stabilizer is one or two of light stabilizer 622, light stabilizer 944 or light stabilizer 783;
the dispersing agent is polyethylene wax.
The preferable preparation method is that the temperature of the feeding section of the parallel double-screw granulator is 140-155 ℃, the temperature of the machine body section is 150-170 ℃, and the temperature of the discharging section of the machine head is 155-165 ℃.
Compared with the prior art, the invention has the following advantages:
the agricultural mulching film weed control master batch is 2-3 mm columnar particles, the appearance of the agricultural mulching film weed control master batch is similar to that of a polyethylene raw material, and the master batch and the polyethylene raw material are directly used in an agricultural mulching film production process according to the proportion of 10-15: 100, and obtaining the agricultural mulching film with the weed control function by utilizing a general blow molding process; the mulching film for weeding farmland has the functions of water retention, heat preservation and fertilizer loss prevention of common mulching films, also has excellent weeding function and insecticidal effect, and the weeding rate is more than 95%;
the weed control principle of the agricultural mulching film weed control master batch is that by utilizing the incompatibility among polyethylene molecules, weed control agents and other auxiliary agents, the weed control agent molecules contained on the surface of the mulching film are dissolved under the condition that water drops are attached to the film surface, and then the water drops are dissolved into the film surface and then drop down or directly infiltrate the ground surface to form a weed control treatment layer with a certain weed control agent concentration, and then the weed control agent is absorbed by sheaths, stems, leaves and roots of weeds and enters the bodies of the weeds through conduction, so that plant cells are changed in physiology or form, and the growth is inhibited or even die. Particularly, the talcum powder and/or the nano calcium carbonate are/is used as the slow release agent, the slow release agent can adsorb the herbicide in the inner gap of the slow release agent, the herbicide is prevented from losing in the storage and transportation processes, but in the using process of the mulching film, the herbicide can be slowly separated out under the action of light and heat, water drops formed by surface water evaporation on the surface of the mulching film flow to the ground, the slow release weeding effect is achieved, and the weeding effect can be achieved in the whole growth stage of crops.
The weed control mulching film prepared from the mulching film weed control master batch enriches the application functions of common mulching films, has the functions of temperature rise and water retention, and also has the function of weed control, can save a large amount of labor for weed control, and can effectively promote the yield increase of crops because the young weeds are killed when budding, so that the conditions of water competition, fertilizer competition and growth space competition between the weeds and the crops can be avoided. The weed control mulching film prepared from the mulching film weed control master batch has an excellent weed control function, saves a large amount of labor for removing weeds in a farmland, and does not need to spray weed control pesticide on the farmland, so that the natural environment is protected.
Detailed Description
The invention aims to provide a mulching film weeding master batch and a preparation method thereof, and the mulching film weeding master batch is realized by the following technical scheme:
an agricultural mulching film weed control master batch comprises the following raw materials in parts by weight: 15-30 parts of a weed control agent, 50-60 parts of polyethylene, 10-15 parts of EVA (ethylene vinyl acetate), 2-5 parts of a stabilizer, 0.1-0.3 part of a plasticizer, 10-25 parts of a slow release agent, 0.5-1 part of an antioxidant, 1-3 parts of a light stabilizer, 0.5-1.5 parts of a colorant and 2-3 parts of a dispersing agent;
wherein the stabilizer is 8901 emulsifier;
the plasticizer is epoxy resin;
the slow release agent is talcum powder and/or nano calcium carbonate;
the antioxidant is antioxidant B215 and/or antioxidant B225;
the light stabilizer is one or two of light stabilizer 622, light stabilizer 944 or light stabilizer 783;
the dispersing agent is polyethylene wax.
The invention can select any herbicide on the market, such as gesson, trifluralin, prometryn, simazine, a fruit herbicide, glyphosate, aclofen, paraquat, glyphosate, prometryn, butachlor, atrazine, 2,4-D butyl ester, metolachlor, prometryn, pendimethalin, paraquat, quizalofop-p-ethyl, imazethapyr, fomesafen, clomazone, metolachlor, acetochlor, pretilachlor and the like.
Preferably, the feed consists of the following raw materials in parts by weight: 20-25 parts of a weed control medicament, 52-58 parts of polyethylene, 12-15 parts of EVA (ethylene vinyl acetate), 3-4 parts of a stabilizer, 0.1-0.2 part of a plasticizer, 15-20 parts of a slow release agent, 0.6-0.8 part of an antioxidant, 1.5-2.5 parts of a light stabilizer, 0.8-1.2 parts of a colorant and 2.4-2.8 parts of a dispersant.
Preferably, the herbicide is one, two or three of s-metolachlor, acetochlor or pretilachlor.
Preferably, the molecular weight of the polyethylene wax is in the range of 500-2000, the low molecular weight polyethylene wax has more excellent dispersing effect, and can be better fused with other auxiliary agents. The polyethylene wax serving as the dispersing agent can ensure that the slow release agent and the weed killer are uniformly distributed in a system of the agricultural mulching film, and the weed killing effect of the agricultural mulching film is exerted to the maximum extent.
Preferably, the polyethylene is linear polyethylene, and the preferred linear polyethylene has no long side chain on the main chain of the macromolecule and only has short side chain, so that the polyethylene can be better fused with other auxiliary agents.
Preferably, the colorant is a red, green or white pigment. The pigment can be selected from golden bright red, permanent red, phthalocyanine green, rutile type titanium dioxide and the like.
Preferably, the light stabilizer is light stabilizer 622.
Preferably, the slow release agent is nano calcium carbonate.
The invention also comprises a preparation method of the agricultural mulching film weed-killing master batch, which comprises the following steps: adding 15-30 parts by weight of a herbicide and 50-60 parts by weight of polyethylene into a high-speed mixer, uniformly mixing, adding 10-15 parts by weight of EVA, 2-5 parts by weight of a stabilizer, 0.1-0.3 part by weight of a plasticizer, 10-25 parts by weight of a slow release agent, 0.5-1 part by weight of an antioxidant, 1-3 parts by weight of a light stabilizer, 0.5-1.5 parts by weight of a colorant and 2-3 parts by weight of a dispersant, continuously stirring and uniformly mixing to obtain a mixture, and extruding and granulating the mixture in a parallel double-screw granulator to obtain an agricultural mulching film weed control master batch;
wherein the stabilizer is 8901 emulsifier;
the plasticizer is epoxy resin;
the slow release agent is talcum powder and/or nano calcium carbonate;
the antioxidant is antioxidant B215 and/or antioxidant B225;
the light stabilizer is one or two of light stabilizer 622, light stabilizer 944 or light stabilizer 783;
the dispersing agent is polyethylene wax.
The preferable preparation method is that the temperature of the feeding section of the parallel double-screw granulator is 140-155 ℃, the temperature of the machine body section is 150-170 ℃, and the temperature of the discharging section of the machine head is 155-165 ℃.
The weeding mulching film prepared from the mulching film weeding master batch is widely applicable to crops such as cotton, peanuts, corn, garlic, potatoes, sugarcane, sunflower, hot pepper, beans, rape, tobacco, castor-oil plant, green Chinese onion, strawberry, onion, eggplant, sweet potato, tomato, lettuce, radish and the like, and is excellent in weeding effect after being applied in a large area, so that high reliability of agricultural workers is achieved. The weeding mulching film prepared from the mulching film weeding master batch has a killing rate of over 90 percent on annual arborescent weeds and part of small-particle seeds, has special effects on annual arborescent weeds such as crab grass, green bristlegrass, goosegrass, moleplant seed, alopecurus, wild oat, bluegrass, stiff grass, teff and the like, and also has certain control effects on the annual arborescent weeds such as chenopodiaceae, amaranthaceae, polygonaceae, dayflower, starwort, dodder and the like.
The invention is further described with reference to specific examples.
Example 1
An agricultural mulching film weed control master batch is composed of the following raw materials: 15kg of metolachlor, 50kg of polyethylene, 10kg of EVA (ethylene vinyl acetate) 10kg, 2kg of stabilizer, 0.1kg of plasticizer, 10kg of slow release agent, 0.5kg of antioxidant, 1kg of light stabilizer, 0.5kg of colorant and 2kg of dispersant;
wherein the stabilizer is 8901 emulsifier;
the plasticizer is epoxy resin;
the slow release agent is talcum powder;
the antioxidant is antioxidant B215;
the light stabilizer is light stabilizer 622;
the dispersing agent is polyethylene wax.
Example 2
An agricultural mulching film weed control master batch is composed of the following raw materials: 30kg of acetochlor, 60kg of polyethylene, 15kg of EVA, 5kg of stabilizer, 0.3kg of plasticizer, 25kg of slow release agent, 1kg of antioxidant, 3kg of light stabilizer, 0.5-1.5 kg of colorant and 3kg of dispersant;
wherein the stabilizer is 8901 emulsifier;
the plasticizer is epoxy resin;
the slow release agent is talcum powder and/or nano calcium carbonate;
the antioxidant is antioxidant B225;
the light stabilizer is light stabilizer 944;
the dispersing agent is polyethylene wax.
Example 3
An agricultural mulching film weed control master batch is composed of the following raw materials: 20kg of pretilachlor, 52kg of polyethylene, 12kg of EVA, 3kg of stabilizer, 0.1kg of plasticizer, 15kg of slow release agent, 0.6kg of antioxidant, 1.5kg of light stabilizer, 0.8kg of colorant and 2.4kg of dispersant;
wherein the stabilizer is 8901 emulsifier;
the plasticizer is epoxy resin;
the slow release agent is talcum powder and nano calcium carbonate according to the weight ratio of 7: 8 by mass ratio;
antioxidants antioxidant B215 and antioxidant B225 the following ratio 1: 1 by mass ratio;
the light stabilizer is 783;
the dispersing agent is polyethylene wax.
Example 4
An agricultural mulching film weed control master batch is composed of the following raw materials: 10kg of metolachlor, 15kg of acetochlor, 58kg of polyethylene, 15kg of EVA, 4kg of stabilizer, 0.2kg of plasticizer, 20kg of slow release agent, 0.8kg of antioxidant, 2.5kg of light stabilizer, 1.2kg of titanium pigment and 2.8kg of dispersant;
wherein the stabilizer is 8901 emulsifier;
the plasticizer is epoxy resin;
the slow release agent is talcum powder and nano calcium carbonate according to the weight ratio of 1: 1 by mass ratio;
antioxidants antioxidant B215 and antioxidant B225 the following ratio 1: 3, mixing the components in a mass ratio;
light stabilizers light stabilizer 622 and light stabilizer 944 light stabilizers 2: 3, mixing the components in a mass ratio;
the dispersing agent is polyethylene wax.
Example 5
An agricultural mulching film weed control master batch is composed of the following raw materials: 11kg of acetochlor, 11kg of pretilachlor, 55kg of linear polyethylene, 14kg of EVA, 3.4kg of stabilizer, 0.15kg of plasticizer, 18kg of slow release agent, 0.7kg of antioxidant, 2kg of light stabilizer, 1.0kg of phthalocyanine green and 2.5kg of dispersant;
wherein the stabilizer is 8901 emulsifier;
the plasticizer is epoxy resin;
the slow release agent is nano calcium carbonate;
the antioxidant is antioxidant B215;
the light stabilizer is light stabilizer 622;
the dispersant is low molecular weight polyethylene wax.
Example 6
An agricultural mulching film weed control master batch is composed of the following raw materials: 10kg of refined metolachlor, 10kg of acetochlor, 3kg of pretilachlor, 56kg of linear polyethylene, 13kg of EVA, 3.5kg of stabilizer, 0.18kg of plasticizer, 18kg of slow-release agent, 0.65kg of antioxidant, 2.2kg of light stabilizer, 0.9kg of aurora and 2.6kg of dispersant;
wherein the stabilizer is 8901 emulsifier;
the plasticizer is epoxy resin;
the slow release agent is talcum powder and nano calcium carbonate according to the mass ratio of 1: 1, mixing to obtain;
the antioxidant is antioxidant B225;
the light stabilizer is light stabilizer 622 and light stabilizer 783 which are mixed according to the mass ratio of 1: 1, mixing to obtain;
the dispersant is low molecular weight polyethylene wax.
Example 7
The preparation method of the agricultural mulching film weeding master batch of the embodiment 1 comprises the following steps:
firstly adding 15kg of metolachlor and 50kg of polyethylene into a high-speed mixer for uniform mixing, then adding 10kg of EVA, 2kg of stabilizer, 0.1kg of plasticizer, 10kg of slow-release agent, 0.5kg of antioxidant, 1kg of light stabilizer, 0.5kg of colorant and 2kg of dispersant into the high-speed mixer for continuous stirring and uniform mixing to obtain a mixture, and extruding and granulating the mixture in a parallel double-screw granulator to obtain an agricultural mulching film weed control master batch;
wherein the stabilizer is 8901 emulsifier; the plasticizer is epoxy resin; the slow release agent is talcum powder; the antioxidant is antioxidant B215; the light stabilizer is light stabilizer 622; the dispersing agent is polyethylene wax;
the temperature of the feeding section of the parallel double-screw granulator is 140 ℃, the temperature of the machine body section is 150 ℃, and the temperature of the discharging section of the machine head is 155 ℃.
Example 8
The preparation method of the agroforestry weed-killing masterbatch of embodiment 2 comprises the following steps:
firstly, adding 30kg of acetochlor and 60kg of polyethylene into a high-speed mixer, uniformly mixing, then adding 15kg of EVA15kg, 5kg of stabilizing agent, 0.3kg of plasticizer, 25kg of slow release agent, 1kg of antioxidant, 3kg of light stabilizer, 0.5-1.5 kg of colorant and 3kg of dispersing agent, continuously stirring and uniformly mixing to obtain a mixture, and extruding and granulating the mixture in a parallel double-screw granulator to obtain the mulching film weed control master batch;
wherein the stabilizer is 8901 emulsifier; the plasticizer is epoxy resin; the slow release agent is talcum powder and/or nano calcium carbonate; the antioxidant is antioxidant B225; the light stabilizer is light stabilizer 944; the dispersing agent is polyethylene wax;
the temperature of the feeding section of the parallel double-screw granulator is 155 ℃, the temperature of the machine body section is 160 ℃, and the temperature of the discharging section of the machine head is 165 ℃.
Example 9
The preparation method of the agroforestry weed-killing masterbatch of embodiment 3 comprises the following steps:
firstly, adding 20kg of pretilachlor and 52kg of polyethylene into a high-speed mixer, uniformly mixing, then adding 12kg of EVA12kg, 3kg of stabilizer, 0.1kg of plasticizer, 15kg of slow-release agent, 0.6kg of antioxidant, 1.5kg of light stabilizer, 0.8kg of colorant and 2.4kg of dispersant into the high-speed mixer, continuously stirring and uniformly mixing to obtain a mixture, and extruding and granulating the mixture in a parallel double-screw granulator to obtain an agricultural mulching film weed control master batch;
wherein the stabilizer is 8901 emulsifier; the plasticizer is epoxy resin; the slow release agent is talcum powder and nano calcium carbonate according to the weight ratio of 7: 8 by mass ratio; antioxidants antioxidant B215 and antioxidant B225 the following ratio 1: 1 by mass ratio; the light stabilizer is 783; the dispersing agent is polyethylene wax;
wherein the temperature of the feeding section of the parallel double-screw granulator is 145 ℃, the temperature of the machine body section is 155 ℃, and the temperature of the discharging section of the machine head is 160 ℃.
Example 10
The preparation method of the agroforestry weed-killing masterbatch of embodiment 4 comprises the following steps:
firstly, adding 10kg of fine metolachlor, 15kg of acetochlor and 58kg of polyethylene into a high-speed mixer for uniform mixing, then adding 15kg of EVA, 4kg of stabilizer, 0.2kg of plasticizer, 20kg of slow release agent, 0.8kg of antioxidant, 2.5kg of light stabilizer, 1.2kg of titanium dioxide and 2.8kg of dispersing agent into the mixture, continuously stirring and uniformly mixing to obtain a mixture, and extruding and granulating the mixture in a parallel double-screw granulator to obtain an agricultural mulching film weed control master batch;
wherein the stabilizer is 8901 emulsifier; the plasticizer is epoxy resin; the slow release agent is talcum powder and nano calcium carbonate according to the weight ratio of 1: 1 by mass ratio; antioxidants antioxidant B215 and antioxidant B225 the following ratio 1: 3, mixing the components in a mass ratio; light stabilizers light stabilizer 622 and light stabilizer 944 light stabilizers 2: 3, mixing the components in a mass ratio; the dispersing agent is polyethylene wax;
wherein the temperature of the feeding section of the parallel double-screw granulator is 150 ℃, the temperature of the machine body section is 155 ℃, and the temperature of the discharging section of the machine head is 165 ℃.
Example 11
The preparation method of the agroforestry weed-killing masterbatch of embodiment 5 comprises the following steps:
firstly, adding 11kg of acetochlor, 11kg of pretilachlor and 55kg of linear polyethylene into a high-speed mixer, uniformly mixing, then adding 14kg of EVA, 3.4kg of stabilizer, 0.15kg of plasticizer, 18kg of slow-release agent, 0.7kg of antioxidant, 2kg of light stabilizer, 1.0kg of phthalocyanine green and 2.5kg of dispersant into the mixture, continuously stirring and uniformly mixing to obtain a mixture, and extruding and granulating the mixture in a parallel double-screw granulator to obtain an agricultural mulching film weed control master batch;
wherein the stabilizer is 8901 emulsifier; the plasticizer is epoxy resin; the slow release agent is nano calcium carbonate; the antioxidant is antioxidant B215; the light stabilizer is light stabilizer 622; the dispersing agent is low molecular weight polyethylene wax;
wherein the temperature of the feeding section of the parallel double-screw granulator is 145 ℃, the temperature of the machine body section is 155 ℃, and the temperature of the discharging section of the machine head is 155 ℃.
Example 12
The preparation method of the agroforestry weed-killing masterbatch of embodiment 6 comprises the following steps:
firstly, adding 10kg of fine metolachlor, 10kg of acetochlor, 3kg of pretilachlor and 56kg of linear polyethylene into a high-speed mixer for uniform mixing, then adding 10-15 parts of EVA, 2-5 parts of a stabilizer, 0.1-0.3 part of a plasticizer, 10-25 parts of a slow release agent, 0.5-1 part of an antioxidant, 1-3 parts of a light stabilizer, 0.5-1.5 parts of a colorant and 2-3 parts of a dispersing agent into the mixture, continuously stirring and uniformly mixing to obtain a mixture, and extruding and granulating the mixture in a parallel double-screw granulator to obtain an agricultural mulching film weed control master batch;
wherein the temperature of the feeding section of the parallel double-screw granulator is 150 ℃, the temperature of the machine body section is 155 ℃, and the temperature of the discharging section of the machine head is 160 ℃.
Comparative example 1
An agricultural mulching film weed control master batch is composed of the following raw materials: 10kg of refined metolachlor, 10kg of acetochlor, 3kg of pretilachlor, 56kg of linear polyethylene, 13kg of EVA, 3.5kg of stabilizer, 0.18kg of plasticizer, 0.65kg of antioxidant, 2.2kg of light stabilizer, 0.9kg of permanent red and 2.6kg of dispersant;
wherein the stabilizer is 8901 emulsifier;
the plasticizer is epoxy resin;
the antioxidant is antioxidant B225;
the light stabilizer is light stabilizer 622 and light stabilizer 783 which are mixed according to the mass ratio of 1: 1, mixing to obtain;
the dispersant is low molecular weight polyethylene wax.
Soaking a certain mass of the agroforestry weeding master batches of examples 1-6 and the agroforestry weeding master batches obtained in the comparative example in water at room temperature for 168 hours, taking out the agroforestry weeding master batches and standing the agroforestry weeding master batches at room temperature for drying for 48 hours, weighing and calculating the weight loss of the mulching film, wherein the weight loss is expressed by percentage, then continuously placing the agroforestry weeding master batches in water at room temperature for soaking for 168 hours, taking out the agroforestry weeding master batches and standing the agroforestry weeding master batches at room temperature for drying for 48 hours; the results are shown in Table 1.
The results in table 1 show that the agricultural mulching film weeding master batch has good slow release effect, and the agricultural mulching film weeding master batch has long weeding effect time and can exert the weeding effect in each stage of crops.
Claims (10)
1. An agricultural mulching film weed control master batch is characterized in that: the composite material comprises the following raw materials in parts by weight: 15-30 parts of a weed control agent, 50-60 parts of polyethylene, 10-15 parts of EVA (ethylene vinyl acetate), 2-5 parts of a stabilizer, 0.1-0.3 part of a plasticizer, 10-25 parts of a slow release agent, 0.5-1 part of an antioxidant, 1-3 parts of a light stabilizer, 0.5-1.5 parts of a colorant and 2-3 parts of a dispersing agent;
wherein the stabilizer is 8901 emulsifier;
the plasticizer is epoxy resin;
the slow release agent is talcum powder and/or nano calcium carbonate;
the antioxidant is antioxidant B215 and/or antioxidant B225;
the light stabilizer is one or two of light stabilizer 622, light stabilizer 944 or light stabilizer 783;
the dispersing agent is polyethylene wax.
2. The agricultural mulching film weeding master batch according to claim 1, wherein: the composite material comprises the following raw materials in parts by weight: 20-25 parts of a weed control medicament, 52-58 parts of polyethylene, 12-15 parts of EVA (ethylene-vinyl acetate), 3-4 parts of a stabilizer, 0.1-0.2 part of a plasticizer, 15-20 parts of a slow release agent, 0.6-0.8 part of an antioxidant, 1.5-2.5 parts of a light stabilizer, 0.8-1.2 parts of a coloring agent and 2.4-2.8 parts of a dispersing agent.
3. The agricultural mulching film weeding master batch according to claim 1, wherein: the herbicide is one, two or three of s-metolachlor, acetochlor or pretilachlor.
4. The agricultural mulching film weeding master batch according to claim 1, wherein: the dispersing agent is low molecular weight polyethylene wax.
5. The agricultural mulching film weeding master batch according to claim 1, wherein: the polyethylene is linear polyethylene.
6. The agricultural mulching film weeding master batch according to claim 1, wherein: the colorant is a red, green or white pigment.
7. The agricultural mulching film weeding master batch according to claim 1, wherein: the light stabilizer is light stabilizer 622.
8. The agricultural mulching film weeding master batch according to claim 1, wherein: the slow release agent is nano calcium carbonate.
9. The preparation method of the agricultural mulching film weed-killing master batch of claim 1, which is characterized by comprising the following steps: adding 15-30 parts by weight of a herbicide and 50-60 parts by weight of polyethylene into a high-speed mixer, uniformly mixing, adding 10-15 parts by weight of EVA, 2-5 parts by weight of a stabilizer, 0.1-0.3 part by weight of a plasticizer, 10-25 parts by weight of a slow release agent, 0.5-1 part by weight of an antioxidant, 1-3 parts by weight of a light stabilizer, 0.5-1.5 parts by weight of a colorant and 2-3 parts by weight of a dispersant, continuously stirring and uniformly mixing to obtain a mixture, and extruding and granulating the mixture in a parallel double-screw granulator to obtain an agricultural mulching film weed control master batch;
wherein the stabilizer is 8901 emulsifier;
the plasticizer is epoxy resin;
the slow release agent is talcum powder and/or nano calcium carbonate;
the antioxidant is antioxidant B215 and/or antioxidant B225;
the light stabilizer is one or two of light stabilizer 622, light stabilizer 944 or light stabilizer 783;
the dispersing agent is polyethylene wax.
10. The preparation method of the mulching film weeding master batch according to claim 9, wherein the temperature of the feeding section of the parallel twin-screw granulator is 140-155 ℃, the temperature of the body section of the parallel twin-screw granulator is 150-170 ℃, and the temperature of the discharging section of the machine head of the parallel twin-screw granulator is 155-165 ℃.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111703168A (en) * | 2020-07-06 | 2020-09-25 | 郭树然 | Weeding master batch, weeding mulching film and preparation method thereof |
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