CN108690333A - A kind of biodegradable mulch of high-barrier and preparation method thereof - Google Patents
A kind of biodegradable mulch of high-barrier and preparation method thereof Download PDFInfo
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- CN108690333A CN108690333A CN201810311830.4A CN201810311830A CN108690333A CN 108690333 A CN108690333 A CN 108690333A CN 201810311830 A CN201810311830 A CN 201810311830A CN 108690333 A CN108690333 A CN 108690333A
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- C—CHEMISTRY; METALLURGY
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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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- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
- B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/416—Reflective
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
- B32B2307/7265—Non-permeable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2410/00—Agriculture-related articles
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- C08K3/22—Oxides; Hydroxides of metals
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Abstract
The invention discloses a kind of biodegradable mulches of high-barrier, including following weight percent:Fatty poly-ester carbonate 10-40%, PBAT 50-70%, inorganic filler 1-5%, light stabilizer 0.1-2%, lubricant 0.1-2%, heat stabilizer 0.1-2%, using fatty poly-ester carbonate modified PBAT mulch, obtain the ground membrane product with good barrier, meet the growth demand of most of crop, while biological degradability is good;And be mulch made of raw material relative to fatty poly-ester carbonate, there is higher fusing point and intensity, and reduce difficulty of processing, production cost is relatively low, and has good biodegradability, has good application prospect.
Description
Technical field
The present invention relates to a kind of mulch of fully biodegradable, the biodegradable mulch of specially a kind of high-barrier and its
Preparation method.
Background technology
China's film-mulching cultivation technique is to be introduced from Japan for 1978, through experiment and demonstration, is widely applied rapidly in China,
Nineteen eighty-three agricultural mulching area coverage reaches 943.7 ten thousand mu, as the technology application range is from initial vegetables, peanut, cotton
Covering, develops to 10 multiple fields such as industrial crops such as sugar material, tobacco, grain, and up to the present, China's agricultural film covering soil exists
It 400000000 mu or more, has reached 2,700,000 tons or so within 2010, accounts for No. 1 in the world.But with the extensive application of mulch, residual film is got over
Among being accumulated in soil more, results in soil moisture, nutrient and migrate downwards hindered, soil porosity, permeability
It reduces, be unfavorable for soil air cycle and exchange, influence the formation of soil normal configuration, ultimately cause farmland quality decline, again
So that moisture penetration amount is reduced because mulch residual quantity increases since residual film hinders the infiltration of soil capillarity water pipe and Natural Water, causes
Soil moisture content declines, and is reduced so as to cause the cultivable area of China's soil.In addition, residual film is disorderly floatd with the wind, environment is not only polluted,
The livestocks such as cattle and sheep can also cause intestinal obstruction after eating, the biodegradable mulch for preventing " white pollution " is the certainty of mulch development
Trend.
To meet biodegradable requirement, the material for being primarily useful for making biodegradable mulch at present on the market has
PBAT and fatty poly-ester carbonate etc., but mulch is fabricated separately by raw material of PBAT, the barrier property of ground membrane product is too poor, such as
PE mulch water vapor transmittances are 70g/m2.d, and PBAT mulches water vapor transmittance is 2500g/m2.d under the conditions of condition of equivalent thickness), no
The growth demand of most of crops can be met;And mulch is made using fatty poly-ester carbonate as raw material, due to aliphatic poly carbon
The distinctive carbonic ether structure of acid esters has higher weatherability and barrier property (makrolon water vapor transmittance 200g/m2.d), but
It is individual fatty poly-ester carbonate there are fusing points low, intensity difference, the shortcomings of being difficult to, therefore there is presently no such mulches
Product invests market.
Invention content
First goal of the invention of the present invention is to provide a kind of biodegradable mulch of high-barrier, which adds in PBAT
Enter a certain amount of fatty poly-ester carbonate, be modified with fatty poly-ester carbonate so that such mulch is compared to no aliphatic
The PBAT mulches of makrolon, there is preferable barrier property, compared to the aliphatic polycarbonate mulch film without PBAT raw materials, have compared with
High fusing point and intensity, and difficulty of processing is reduced, to reduce cost;By adjusting PBAT and aliphatic poly carbon in mulching film raw material
The ratio of acid esters can make the advantage and disadvantage of mulch synthesis PBAT and fatty poly-ester carbonate, to meet most of crops
Growth demand;And the mulch biological degradability is good, is of great importance to solving China's agriculture " white pollution ".
In order to achieve the above-mentioned object of the invention, present invention employs following technical schemes:A kind of high-barrier is biodegradablely
Film, the biodegradable mulching film raw material by being made following weight percentage components:Fatty poly-ester carbonate 20-40%,
PBAT 50-70%, inorganic filler 1-5%, light stabilizer 0.1-2%, lubricant 0.1-2%, heat stabilizer 0.1-2%.
Preferably, the fatty poly-ester carbonate be selected from poly- butylene carbonate, poly- pentylene carbonate, polyhexamethylene carbonate,
One kind or combinations thereof in poly (propylene carbonate), poly- (carbonic acid-terephthalic acid (TPA)) fourth diester;The fatty poly-ester carbonate molecule
Amount is 40000-150000.
Preferably, the one kind or combinations thereof of the inorganic filler in titanium dioxide, talcum powder, barium sulfate;It is described inorganic
Packing material size is more than 2000 mesh.
Further preferably, the fatty poly-ester carbonate is poly- butylene carbonate;The inorganic filler is talcum powder.
Preferably, the one kind or combinations thereof of the light stabilizer in hindered amine light stabilizer, ultra-violet absorber;
The one kind or combinations thereof of the lubricant in erucyl amide, oleamide, stearic acid, calcium stearate;The heat stabilizer
One kind or combinations thereof in Hinered phenols heat stabilizer, phosphite ester type thermal stabilizing agent.
Second goal of the invention of the present invention is to provide a kind of preparation method of the biodegradable mulch of high-barrier, for reality
Existing foregoing invention purpose, present invention employs following technical schemes:A kind of preparation method of the biodegradable mulch of high-barrier, packet
Include following steps:Raw material passes through melt blending, granulation and blown film successively, obtains Biodegradable mulch product;
A, the biodegradable mulching film raw material is put into double screw extruder, melt blending after mixing;
B, biodegradable modified ground film special material is made in extruding pelletization after air-cooled pelletizing;
C. biodegradable modified ground film special material obtained is put into single screw rod inflation film manufacturing machine, Biodegradable mulch is made in blown film
Product.
Preferably, the Biodegradable mulch products thickness is between 0.005-0.030mm, width 40-300cm it
Between.
Preferably, the melt blending temperature is 140-180 DEG C.
Preferably, the blown film temperature is 150-180 DEG C.
The third goal of the invention of the present invention is to provide a kind of biodegradable mulch of high light transmission of heat and moisture preserving, using the ground
Film can effectively prevent ground water evaporation and condense into steam in ground film inner layer, influences the translucency of mulch.On realizing
Goal of the invention is stated, the present invention adopts the following technical scheme that:A kind of biodegradable mulch of high light transmission of heat and moisture preserving, it is described can biology
Degradative plastic film includes transparent mulch main layer and antifog internal layer, and transparent mulch main layer by being made following weight percentage components:Fat
Fat adoption carbonic ester 20-40%, PBAT50-70%, aerosil 4-7%, light stabilizer 0.1-2%, lubricant 0.1-
2%, heat stabilizer 0.1-2%.
Aerosil is as filler, and not only superficial attractive forces are strong, and surface energy is big, and chemical purity is high, dispersion performance is good,
So that transparent mulch main layer surface has fluffy and porosity, it is convenient for the attachment of hydrophily anti-fog coating so that hydrophilic
Property anti-fog coating directly cover painting just there is good effect, reduce manufacturing cost, and aerosil is also to transparent mulch
Main layer has strengthening action.
Preferably, the antifog internal layer is the hydrophily anti-fog coating obtained following preparation method:
A, polymethylacrylic acid and water are mixedly configured into a concentration of 25% polymethyl aqueous acid;
B, polyethylene glycol and water are mixedly configured into a concentration of 60% Aqueous Solutions of Polyethylene Glycol;
C, the mixing of the aqueous solution of step a and step b is according to volume ratio 1:2-30 is mixed, stirring to obtain mixed liquor;
D, pH value is controlled within the scope of 1-4 with pH adjusting agent, after stirring fully, ultrasound or discontinuous degassing;
E, above-mentioned mixed liquor is coated in the medial surface of transparent mulch main layer, form the high light penetrating copolymer in antifog internal layer
Layer, i.e. hydrophily anti-fog coating;
F, heat treatment obtains:The temperature range of heat treatment is 80 DEG C, and the time of the heat treatment is 1-2 hours.
Preferably, the preparation of the transparent mulch main layer includes the following steps:Raw material successively pass through melt blending, be granulated and
Blown film obtains biodegradable transparent mulch main layer product;
A, the transparent mulch main layer raw material is put into double screw extruder, melt blending after mixing;
B, transparent mulch main layer PP Pipe Compound is made in extruding pelletization after air-cooled pelletizing;
C. transparent mulch main layer PP Pipe Compound obtained is put into single screw rod inflation film manufacturing machine, transparent mulch main layer is made in blown film.
The 4th goal of the invention of the present invention is to provide a kind of weed removal mulch film that moisturizing is biodegradable, which is
Reflective layer can effectively reduce the translucency of mulch, to effectively inhibit the growth of weeds in mulch.In order to realize the invention
Purpose, the present invention adopt the following technical scheme that:A kind of weed removal mulch film that moisturizing is biodegradable, the biodegradable mulch packet
Transparent mulch main layer and reflective outer layer are included, transparent mulch main layer by being made following weight percentage components:Aliphatic poly carbonic acid
Ester 20-40%, PBAT 50-70%, precipitated calcium carbonate 4-7%, light stabilizer 0.1-2%, lubricant 0.1-2%, heat stabilizer
0.1-2%;
The reflective outer layer by being made following weight percentage components:Reflective glass beads 4-10%, PBAT50-
70%, PLA20-40%, light stabilizer 1-3%, antioxidant 0.5-2%, erucyl amide 0.5-2%.
Preferably, the reflective glass beads granularity is 1000-1500 mesh.
The 5th goal of the invention of the present invention is to provide a kind of preparation side for the weed removal mulch film that above-mentioned moisturizing is biodegradable
Method, in order to realize that the goal of the invention, the present invention adopt the following technical scheme that:A kind of system for the weed removal mulch film that moisturizing is biodegradable
Preparation Method includes the following steps:Raw material successively pass through melt blending, granulation and blown film, obtain moisturizing it is biodegradable remove meadow
Membrane product;
A, after mixing transparent mulch main layer raw material according to the ratio, the transparent mulch main layer is put into double spiral shells after mixing
Bar extruder, melt blending;
After reflective outer layer raw material is mixed according to the ratio, the reflective outer layer raw material is put into twin-screw extrusion after mixing
Machine, melt blending;
B, above-mentioned transparent mulch main layer and reflective outer layer raw material are distinguished into extruding pelletization, transparent mulch is made after air-cooled pelletizing
Main layer PP Pipe Compound and reflective outer layer PP Pipe Compound;
C. transparent mulch main layer PP Pipe Compound obtained and the double-deck inflation film manufacturing machine of reflective outer layer PP Pipe Compound input are carried out compound, crowded
Go out, the biodegradable weed removal mulch film of the moisturizing is made in Blown Film.
The present invention the 6th goal of the invention be to provide a kind of weed removal mulch film that moisturizing is biodegradable, which is equipped with
Reflective outer layer can effectively reduce the light transmittance of mulch, and simultaneously film inner layer is equipped with the weeding internal layer containing herbicide, Ke Yizeng
Add the herbicidal effect of mulch.In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical scheme that:A kind of moisturizing can biology drop
The weed removal mulch film of solution, the biodegradable mulch include transparent mulch main layer, reflective outer layer and weeding internal layer, transparent mulch master
Layer by being made following weight percentage components:Fatty poly-ester carbonate 20-40%, PBAT 50-70%, aerosil
4-7%, light stabilizer 0.1-2%, lubricant 0.1-2%, heat stabilizer 0.1-2%;
The reflective outer layer by being made following weight percentage components:Reflective glass beads 4-10%, PBAT50-
70%, PLA20-40%, light stabilizer 1-3%, antioxidant 0.5-2%, erucyl amide 0.5-2%;
The weeding internal layer is made of nano-silicon dioxide hollow sphere gel coat and herbicide.
Preferably, the hollow silica ball gel coat is to obtain following preparation method:
A, prepared by the sol solutions of hollow silica ball nano-particle:2-9 parts of polyacrylic acid are dissolved in 45 parts of ammonium hydroxide,
Ultrasonic disperse;It is added dropwise to 900 parts of absolute ethyl alcohol, is uniformly mixed;50 parts of tetraethoxysilane is added dropwise into mixed liquor,
It is uniformly mixed, obtains the sol solutions of hollow silica ball nano-particle.
B, the sol solutions containing the hollow silica ball nano-particle are sprayed on transparent mulch main layer.
Preferably, the one kind or its group of the herbicide in Acetochlor, alachlor, butachlor or isopropyl methoxalamine
It closes.
The 7th goal of the invention of the present invention is to provide a kind of preparation method for the weed removal mulch film that moisturizing is biodegradable, is
Realize that the goal of the invention, the present invention provide the following technical solutions:A kind of preparation side for the weed removal mulch film that moisturizing is biodegradable
Method includes the following steps:Raw material passes through melt blending, granulation, blown film and spraying successively, obtains the biodegradable weeding of moisturizing
Ground membrane product;
A, after mixing transparent mulch main layer raw material according to the ratio, the transparent mulch main layer is put into double spiral shells after mixing
Bar extruder, melt blending;
After reflective outer layer raw material is mixed according to the ratio, the reflective outer layer raw material is put into twin-screw extrusion after mixing
Machine, melt blending;
B, above-mentioned transparent mulch main layer and reflective outer layer raw material are distinguished into extruding pelletization, transparent mulch is made after air-cooled pelletizing
Main layer PP Pipe Compound and reflective outer layer PP Pipe Compound;
C. transparent mulch main layer PP Pipe Compound obtained and the double-deck inflation film manufacturing machine of reflective outer layer PP Pipe Compound input are carried out compound, crowded
Go out, Blown Film;
D. the sol solutions containing hollow silica ball nano-particle are sprayed on transparent mulch main layer, obtain nanometer two
Silica hollow ball gel coat, herbicide even application is adsorbed in nano-silicon dioxide hollow sphere gel coat, is obtained
Biodegradable mulch with weeding function.
Compared with prior art, the high-barrier for using a kind of fatty adoption carbonic ester of above-mentioned technical proposal can biology
Degradative plastic film has the advantages that:
One, the biodegradable mulch of a kind of high-barrier using the present invention has good biological degradability;
Two, the biodegradable mulch of high-barrier using the present invention has relative to using PBAT as mulch made of raw material
Good barrier property meets the growth demand of most of crop;
Three, the biodegradable mulch of high-barrier using the present invention is made of raw material relative to fatty poly-ester carbonate
Mulch has higher fusing point and intensity, and reduces difficulty of processing, and production cost is relatively low;
Four, the biodegradable mulch of the high light transmission of heat and moisture preserving using the present invention, internal layer are antifog internal layer, can be effective
It prevents ground water evaporation from condensing into steam in ground film inner layer, influences the translucency of mulch, can be applied to the industrial crops of plantation
It does not germinate also or when also in Seedling Stage, for being its heat and moisture preserving, and provides sufficient illumination.
Five, the biodegradable weed removal mulch film of moisturizing using the present invention, the mulch are equipped with reflective outer layer, can effectively drop
The light transmittance of low land film, when the industrial crops for being mainly used for planting have broken through mulch, covering with ground sheeting is near crop root
Ground can effectively inhibit the weeds near industrial crops root system to grow up because light transmittance is low.
Six, the biodegradable weed removal mulch film of moisturizing using the present invention, ground film inner layer are equipped with the weeding containing herbicide
Internal layer can further increase the herbicidal effect of mulch on the basis of reflective layer inhibits weed growth by reducing light transmittance.
Specific implementation mode
The present invention is described further with reference to embodiment.It is worth noting that, although following four embodiment is equal
For different mulch products, but it is further improved on the basis of fatty poly-ester carbonate modified PBAT.
Embodiment one is to embodiment three:
A kind of biodegradable mulch of high-barrier, is made as following weight percent of the following raw material:
Above-mentioned fatty poly-ester carbonate is selected from poly- butylene carbonate, poly- pentylene carbonate, polyhexamethylene carbonate, polymerized thylene carbonate
One kind or combinations thereof in propyl ester, poly- (carbonic acid-terephthalic acid (TPA)) fourth diester, and fatty poly-ester carbonate molecular weight is 40000-
150000.Embodiment one to embodiment three selects poly- butylene carbonate.
The one kind or combinations thereof of above-mentioned inorganic filler in titanium dioxide, talcum powder, barium sulfate, and inorganic filler grain size is big
Preferred inorganic filler is talcum powder in 2000 mesh, embodiment one to embodiment three.
The one kind or combinations thereof of above-mentioned light stabilizer in hindered amine light stabilizer, ultra-violet absorber;Above-mentioned purple
Ultraviolet absorbers are current most widely used a kind of light stabilizers, can be divided into salicylic acid esters, benzophenone, benzene by its structure
And triazole type, group-substituted acrylonitrile, triazines etc..
The one kind or combinations thereof of above-mentioned lubricant in erucyl amide, oleamide, stearic acid, calcium stearate;
The one kind or combinations thereof of above-mentioned heat stabilizer in Hinered phenols heat stabilizer, phosphite ester type thermal stabilizing agent.
The preparation method of the biodegradable mulch of the high-barrier includes the following steps:Raw material passes through melt blending, makes successively
Grain and blown film, obtain Biodegradable mulch product;
A, the biodegradable mulching film raw material is put into double screw extruder after mixing, melt blending, melting is altogether
Mixed temperature is 140-180 DEG C;
B, biodegradable modified ground film special material is made in extruding pelletization after air-cooled pelletizing;
C. biodegradable modified ground film special material obtained is put into single screw rod inflation film manufacturing machine, Biodegradable mulch is made in blown film
Product, blown film temperature are 150-180 DEG C.
After obtaining finished product, the index of correlation of ground obtained by the above method membrane product is detected:
Obtain 180 days compost degradation rate >=90% of above-mentioned Biodegradable mulch product, it is seen that the ground membrane product has good
Biological degradability.
The above method is obtained into Biodegradable mulch product as embodiment, using PE mulches under the conditions of condition of equivalent thickness as than
Compared with example one, PBAT mulches detect its moisture-vapor transmission as comparative example two under the conditions of condition of equivalent thickness.Wherein one water of comparative example steams
Vapor permeability is 74g/m2.d, and two moisture-vapor transmission of comparative example is 2566g/m2.d, mulch in embodiment one to embodiment three
Product moisture-vapor transmission is stablized between comparative example one and comparative example two in 500g/m2.d or so.
It is above-mentioned statistics indicate that, a kind of Biodegradable mulch moisture-vapor transmission of high-barrier in embodiment one to three is notable
Less than PBAT mulches under the conditions of condition of equivalent thickness, while moisture-vapor transmission is significantly greater than PE mulches, and moisture-vapor transmission is suitble to
The growth demand of most of industrial crops so that suitable damp condition is in industrial crops cultivating process.
Example IV is to embodiment 15:
Example IV to embodiment 15 respectively compared with embodiment one, only high-barrier Biodegradable mulch raw material and
Its percentage is variant, and preparation method and relevant auxiliary materials and the selection of auxiliary agent are consistent, obtain example IV to embodiment ten
High-barrier in five ground membrane product.
By testing the moisture-vapor transmission of the ground membrane product in above-mentioned 12 embodiments, it can be found that example IV is extremely
The Biodegradable mulch product moisture-vapor transmission of high-barrier in 15 is substantially less than PBAT mulches under the conditions of condition of equivalent thickness, together
When moisture-vapor transmission be significantly greater than PE mulches, moisture-vapor transmission is suitble to the growth demand of most of industrial crops so that
Suitable damp condition is in industrial crops cultivating process.
Embodiment 16 is to embodiment 18:
A kind of biodegradable mulch of high light transmission of heat and moisture preserving, including transparent mulch main layer and antifog internal layer;
Wherein transparent mulch main layer by being made following weight percentage components:
Embodiment 16 to embodiment 18 differs only in ratio of the fumed silica in entire formula, gas phase
The accounting of method silica mainly influences the composite effect of hydrophily anti-fog coating and transparent mulch main layer.
The preparation of transparent mulch main layer includes the following steps:Raw material passes through melt blending, granulation and blown film successively, is given birth to
The transparent mulch main layer product of object degradation;
A, the transparent mulch main layer raw material is put into double screw extruder, melt blending after mixing;
B, transparent mulch main layer PP Pipe Compound is made in extruding pelletization after air-cooled pelletizing;
C. transparent mulch main layer PP Pipe Compound obtained is put into single screw rod inflation film manufacturing machine, transparent mulch main layer is made in blown film.Its
In antifog internal layer be the hydrophily anti-fog coating obtained following preparation method:
A, polymethylacrylic acid and water are mixedly configured into a concentration of 25% polymethyl aqueous acid;
B, polyethylene glycol and water are mixedly configured into a concentration of 60% Aqueous Solutions of Polyethylene Glycol;
C, the mixing of the aqueous solution of step a and step b is according to volume ratio 1:2-30 is mixed, stirring to obtain mixed liquor;
D, pH value is controlled within the scope of 1-4 with pH adjusting agent, after stirring fully, ultrasound or discontinuous degassing;
E, above-mentioned mixed liquor is coated in the medial surface of transparent mulch main layer, form the high light penetrating copolymer in antifog internal layer
Layer, i.e. hydrophily anti-fog coating;
F, heat treatment obtains:The temperature range of heat treatment is 80 DEG C, and the time of the heat treatment is 1-2 hours.
The biodegradable mulch of the high light transmission of heat and moisture preserving by above-mentioned heat treatment, carries out Characteristics Detection as follows:
Using the biodegradable mulch of the high light transmission of the heat and moisture preserving in embodiment 16 to 18 as embodiment, using common PE mulch as
Comparative example takes four glasss 40 DEG C of warm water, and the mulch of embodiment and comparative example is taken to one piece appropriate and same size, covering respectively
On cup, after five minutes, observe embodiment 16 to 18 and comparative example mulch inner surface condensation vapor situation, obtain as
Draw a conclusion:
Mulch condensation vapor amount in embodiment 16 to 18 is noticeably greater than the mulch in comparative example, embodiment 16 to
The notable higher of ground membrane permeability in 18.And hydrophily anti-fog coating and transparent mulch master in embodiment 16 to embodiment 18
The composite effect of layer is preferable, does not occur lamination.
Using above-mentioned simulated experiment it is found that the mulch in embodiment can be very good to solve mulch inner surface condensation vapor shadow
The case where sound permeability problem, the industrial crops that can be widely applied to plantation do not germinate also or are in Seedling Stage, that is, make
When object does not break through mulch also, meet the sunlight needed for plant growth.
Embodiment 19 is to embodiment 21:
Difference lies in walked in the preparation method of antifog internal layer with embodiment 16 to embodiment 21 for embodiment 19
The aqueous solution mixed volume ratio of rapid a and step b is different, remaining is consistent.
Antifog internal layer is the hydrophily anti-fog coating obtained following preparation method:
A, polymethylacrylic acid and water are mixedly configured into a concentration of 25% polymethyl aqueous acid;
B, polyethylene glycol and water are mixedly configured into a concentration of 60% Aqueous Solutions of Polyethylene Glycol;
C, the mixing of the aqueous solution of step a and step b is according to volume ratio 1:2-30 is mixed, stirring to obtain mixed liquor;
D, pH value is controlled within the scope of 1-4 with pH adjusting agent, after stirring fully, ultrasound or discontinuous degassing;
E, above-mentioned mixed liquor is coated in the medial surface of transparent mulch main layer, form the high light penetrating copolymer in antifog internal layer
Layer, i.e. hydrophily anti-fog coating;
F, heat treatment obtains:The temperature range of heat treatment is 80 DEG C, and the time of the heat treatment is 1-2 hours.
The mixing of the aqueous solution of step a and step b is according to volume ratio 1 wherein in embodiment 19:2 mixing, stirring to obtain are mixed
Close liquid;The mixing of the aqueous solution of step a and step b is according to volume ratio 1 in embodiment 20:15 mixing, stirring to obtain mixed liquor;It is real
The aqueous solution of step a and step b in example 21 is applied to mix according to volume ratio 1:30 mixing, stirring to obtain mixed liquor.
The biodegradable mulch of the high light transmission of heat and moisture preserving, carries out as follows in embodiment 19 to embodiment 21
Characteristics Detection:It, will be general using the biodegradable mulch of the high light transmission of the heat and moisture preserving in embodiment 19 to 21 as embodiment
Logical PE mulches take four glasss 40 DEG C of warm water as comparative example, and it is appropriate and identical big respectively to take the mulch of embodiment and comparative example
Small one piece, is covered on cup, after five minutes, observes the steam of embodiment 19 to 21 and comparative example mulch inner surface
Situation is condensed, is obtained as drawn a conclusion:
Mulch condensation vapor amount in embodiment 19 to 21 is noticeably greater than the mulch in comparative example, embodiment 19
To the notable higher of ground membrane permeability in 21.
Using above-mentioned simulated experiment it is found that the mulch in embodiment 19 to 21 can be very good to solve table in mulch
Face condensation vapor influences permeability problem, and the industrial crops that can be widely applied to plantation do not germinate also or the feelings in Seedling Stage
Condition, that is, when crop does not break through mulch also, meet the sunlight needed for plant growth.Embodiment 22 is to embodiment 20
Four:
Difference lies in the preparation method of antifog internal layer with embodiment 16 to embodiment 24 for embodiment 22
The final controlling values of pH are different, remaining is consistent.
Antifog internal layer is the hydrophily anti-fog coating obtained following preparation method:
A, polymethylacrylic acid and water are mixedly configured into a concentration of 25% polymethyl aqueous acid;
B, polyethylene glycol and water are mixedly configured into a concentration of 60% Aqueous Solutions of Polyethylene Glycol;
C, the mixing of the aqueous solution of step a and step b is according to volume ratio 1:2-30 is mixed, stirring to obtain mixed liquor;
D, pH value is controlled within the scope of 1-4 with pH adjusting agent, after stirring fully, ultrasound or discontinuous degassing;
E, above-mentioned mixed liquor is coated in the medial surface of transparent mulch main layer, form the high light penetrating copolymer in antifog internal layer
Layer, i.e. hydrophily anti-fog coating;
F, heat treatment obtains:The temperature range of heat treatment is 80 DEG C, and the time of the heat treatment is 1-2 hours.
The final controlling values of pH are 1 wherein in embodiment 22;The final controlling values of pH are 2.5 in embodiment 23;It is real
It is 4 to apply the final controlling values of pH in example 24.
The biodegradable mulch of the high light transmission of heat and moisture preserving in embodiment 22 to embodiment 24, as follows into
Row Characteristics Detection:Using the biodegradable mulch of the high light transmission of the heat and moisture preserving in embodiment 22 to embodiment 24 as real
Example is applied, using common PE mulch as comparative example, four glasss 40 DEG C of warm water is taken, respectively takes the mulch of embodiment and comparative example suitably
And one piece of same size, it is covered on cup, after five minutes, observation embodiment 22 to embodiment 24 and comparative example
The condensation vapor situation of mulch inner surface, obtains as drawn a conclusion:
Mulch condensation vapor amount in embodiment 22 to embodiment 24 is noticeably greater than the mulch in comparative example, real
Apply the notable higher of ground membrane permeability in example 22 to embodiment 24.
Using above-mentioned simulated experiment it is found that the mulch of embodiment 22 to embodiment 24 can be very good to solve ground
Film inner surface condensation vapor influences permeability problem, and the industrial crops that can be widely applied to plantation do not germinate also or in seedling
The case where phase, that is, when crop does not break through mulch also, meet the sunlight needed for plant growth.
Embodiment 25 is to embodiment 29:
A kind of weed removal mulch film that moisturizing is biodegradable, including transparent mulch main layer, reflective outer layer and weeding internal layer;It is transparent
Mulch main layer by being made following weight percentage components:Poly- butylene carbonate 30%, PBAT64%, aerosil
4.5%, light stabilizer 1%, lubricant 0.2%, heat stabilizer 0.3%;
Wherein reflective outer layer embodiment 25 to 29 by being made following weight percentage components:
Weeding internal layer is made of nano-silicon dioxide hollow sphere gel coat and herbicide, and herbicide, which uniformly sprays, to be received
On rice hollow silica ball gel coat, nano-silicon dioxide hollow sphere gel coat has good suction-operated, can be with
Herbicide is attached to well on weeding internal layer.
The preparation method of the biodegradable weed removal mulch film of above-mentioned moisturizing, mainly includes the following steps:Raw material passes through successively
Melt blending, granulation and blown film obtain the biodegradable weed removal mulch film product of moisturizing;
A, after mixing transparent mulch main layer raw material according to the ratio, the transparent mulch main layer is put into double spiral shells after mixing
Bar extruder, melt blending;
After reflective outer layer raw material is mixed according to the ratio, the reflective outer layer raw material is put into twin-screw extrusion after mixing
Machine, melt blending;
B, above-mentioned transparent mulch main layer and reflective outer layer raw material are distinguished into extruding pelletization, transparent mulch is made after air-cooled pelletizing
Main layer PP Pipe Compound and reflective outer layer PP Pipe Compound;
C. transparent mulch main layer PP Pipe Compound obtained and the double-deck inflation film manufacturing machine of reflective outer layer PP Pipe Compound input are carried out compound, crowded
Go out, the biodegradable weed removal mulch film of the moisturizing is made in Blown Film.
Using mulch obtained by the above method as embodiment, using common PE mulch as comparative example, six glasss etc. are taken with beaker
Identical hydrogen peroxide is measured, beaker side wall and top respectively cover the mulch in one layer of embodiment and comparative example, by above-mentioned two
Beaker is placed on irradiated for 24 hours under the illumination of wavelength 320-380nm after, detect decomposing hydrogen dioxide solution amount.Wherein hydrogen peroxide has light-exposed
Decomposable effect, but the reflecting effect of the biodegradable weed removal mulch film of moisturizing in the present embodiment there is no black mulch film that
It is apparent, and decomposition rate of the hydrogen peroxide at wavelength 320-380nm is than comparatively fast, being shone using the wavelength light can be had in the short time
More apparent difference, convenient for intuitively giving expression to the difference of embodiment and comparative example.
By above-mentioned experimentation, the decomposing hydrogen dioxide solution amount in 25 to 29 beaker of embodiment, which is significantly less than, to be compared
Example in decomposing hydrogen dioxide solution amount, thus we conclude that:Mulch in embodiment 25 to 29 has reduction light transmission
The effect of rate.When the industrial crops that the mulch is mainly used for plantation have broken through mulch, covering with ground sheeting is near crop root
Ground can effectively inhibit the weeds near industrial crops root system to grow up, to be conducive to the life of crop because light transmittance is low
It is long.
Embodiment 30 is to embodiment 32:
It is different at embodiment 30 to embodiment 32 and in embodiment 25 only one, that is, embodiment 30
One layer of weeding internal layer is additionally provided in transparent mulch main layer to the mulch in embodiment 32, the weeding internal layer is by nano-silica
SiClx hollow ball gel coat and herbicide composition, can utilize herbicide on the basis of embodiment 25 is protected from light weeding
Carry out further weeding, it is specific as follows:
A kind of weed removal mulch film that moisturizing is biodegradable, including transparent mulch main layer, reflective outer layer and weeding internal layer;
Wherein transparent mulch main layer by being made following weight percentage components:Fatty poly-ester carbonate 30%, PBAT
64%, aerosil 4.5%, light stabilizer 1%, lubricant 0.2%, heat stabilizer 0.3%;
Wherein reflective outer layer by being made following weight percentage components:Reflective glass beads 5%, PBAT60%,
PLA31%, light stabilizer 2%, antioxidant 1%, erucyl amide 1%;
Wherein hollow silica ball gel coat is to obtain following preparation method:
A, prepared by the sol solutions of hollow silica ball nano-particle:2-9 parts of polyacrylic acid are dissolved in 45 parts of ammonium hydroxide,
Ultrasonic disperse;It is added dropwise to 900 parts of absolute ethyl alcohol, is uniformly mixed;50 parts of tetraethoxysilane is added dropwise into mixed liquor,
It is uniformly mixed, obtains the sol solutions of hollow silica ball nano-particle.
B, the sol solutions containing the hollow silica ball nano-particle are sprayed on transparent mulch main layer.
Hollow silica ball gel coat has good dispersibility and adsorptivity can be by herbicide as medium
It is uniformly adsorbed on transparent mulch main layer, so as to inhibit the growth of the weeds in mulch cladding range.
The one kind or combinations thereof of above-mentioned herbicide in Acetochlor, alachlor, butachlor or isopropyl methoxalamine, such
Herbicide property is relatively stable, is not easy to decompose in light, and is suitably applied mulch field.
A kind of preparation method for the weed removal mulch film that moisturizing is biodegradable, includes the following steps:Raw material is successively by melting
Blending, granulation, blown film and spraying, obtain the biodegradable weed removal mulch film product of moisturizing;
A, after mixing transparent mulch main layer raw material according to the ratio, the transparent mulch main layer is put into double spiral shells after mixing
Bar extruder, melt blending;
After reflective outer layer raw material is mixed according to the ratio, the reflective outer layer raw material is put into twin-screw extrusion after mixing
Machine, melt blending;
B, above-mentioned transparent mulch main layer and reflective outer layer raw material are distinguished into extruding pelletization, transparent mulch is made after air-cooled pelletizing
Main layer PP Pipe Compound and reflective outer layer PP Pipe Compound;
C. transparent mulch main layer PP Pipe Compound obtained and the double-deck inflation film manufacturing machine of reflective outer layer PP Pipe Compound input are carried out compound, crowded
Go out, Blown Film;
D. the sol solutions containing hollow silica ball nano-particle are sprayed on transparent mulch main layer, obtain nanometer two
Silica hollow ball gel coat, herbicide even application is adsorbed in nano-silicon dioxide hollow sphere gel coat, is obtained
Biodegradable mulch with weeding function.
It is distinguished at embodiment 30 to embodiment 32 between each other only one, i.e., polyacrylic acid is in silicon dioxide hollow
Accounting in prepared by ball gel coat is different.
Wherein, the silicon dioxide hollow in embodiment 30 in hollow silica ball gel coat preparation method step a
It is prepared by the sol solutions of ball nano-particle:2 parts of polyacrylic acid are dissolved in 45 parts of ammonium hydroxide, ultrasonic disperse;It is added dropwise to 900 parts
Absolute ethyl alcohol, be uniformly mixed;50 parts of tetraethoxysilane is added dropwise into mixed liquor, is uniformly mixed, obtains silica sky
The sol solutions of bulbus cordis nano-particle.
Hollow silica ball in embodiment 31 in hollow silica ball gel coat preparation method step a is received
It is prepared by the sol solutions of rice corpuscles:5 parts of polyacrylic acid are dissolved in 45 parts of ammonium hydroxide, ultrasonic disperse;It is added dropwise to 900 parts of nothing
Water-ethanol is uniformly mixed;50 parts of tetraethoxysilane is added dropwise into mixed liquor, is uniformly mixed, obtains hollow silica ball
The sol solutions of nano-particle.
Hollow silica ball in embodiment 32 in hollow silica ball gel coat preparation method step a is received
It is prepared by the sol solutions of rice corpuscles:9 parts of polyacrylic acid are dissolved in 45 parts of ammonium hydroxide, ultrasonic disperse;It is added dropwise to 900 parts of nothing
Water-ethanol is uniformly mixed;50 parts of tetraethoxysilane is added dropwise into mixed liquor, is uniformly mixed, obtains hollow silica ball
The sol solutions of nano-particle.
Detection method and conclusion in embodiment 30 to embodiment 32 is consistent in embodiment 25.
The above is the preferred embodiment of the present invention, does not depart from this hair for those of ordinary skill in the art
Under the premise of bright principle, several variations and modifications can also be made, these also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of biodegradable mulch of high-barrier, it is characterised in that:The biodegradable mulching film raw material is by following weight hundred
The component of ratio is divided to be made:Fatty poly-ester carbonate 20-40%, PBAT 50-70%, inorganic filler 1-5%, light stabilizer 0.1-
2%, lubricant 0.1-2%, heat stabilizer 0.1-2%.
2. the biodegradable mulch of a kind of high-barrier according to claim 1, it is characterised in that:The aliphatic poly carbonic acid
Ester is selected from poly- butylene carbonate, poly- pentylene carbonate, polyhexamethylene carbonate, poly (propylene carbonate), poly- (carbonic acid-terephthalic acid (TPA))
One kind or combinations thereof in fourth diester;The fatty poly-ester carbonate molecular weight is 40000-150000;The inorganic filler choosing
From one kind or combinations thereof in titanium dioxide, talcum powder, barium sulfate;The inorganic filler grain size is more than 2000 mesh;The aliphatic
Makrolon is poly- butylene carbonate;The inorganic filler is talcum powder.
3. the biodegradable mulch of a kind of high-barrier according to claim 1, it is characterised in that:The light stabilizer is selected from
One kind or combinations thereof in hindered amine light stabilizer, ultra-violet absorber;The lubricant is selected from erucyl amide, oleic acid acyl
One kind or combinations thereof in amine, stearic acid, calcium stearate;The heat stabilizer is selected from Hinered phenols heat stabilizer, phosphite ester
One kind in type thermal stabilizing agent or combinations thereof.
4. a kind of preparation method of the biodegradable mulch of high-barrier, it is characterised in that:Include the following steps:Raw material passes through successively
Melt blending, granulation and blown film obtain Biodegradable mulch product;
A, the biodegradable mulching film raw material is put into double screw extruder, melt blending after mixing;
B, biodegradable modified ground film special material is made in extruding pelletization after air-cooled pelletizing;
C. biodegradable modified ground film special material obtained is put into single screw rod inflation film manufacturing machine, Biodegradable mulch system is made in blown film
Product;
The Biodegradable mulch products thickness is between 0.005-0.030mm, and width is between 40-300cm;
The melt blending temperature is 140-180 DEG C;The blown film temperature is 150-180 DEG C.
5. a kind of biodegradable mulch of high light transmission of heat and moisture preserving, it is characterised in that:The biodegradable mulch includes transparent
Mulch main layer and antifog internal layer, transparent mulch main layer by being made following weight percentage components:Fatty poly-ester carbonate 20-
40%, PBAT 50-70%, fumed silica 4-7%, light stabilizer 0.1-2%, lubricant 0.1-2%, heat stabilizer
0.1-2%.
6. a kind of biodegradable mulch of the high light transmission of heat and moisture preserving according to claim 5, it is characterised in that:It is described antifog
Internal layer is the hydrophily anti-fog coating obtained following preparation method:
A, polymethylacrylic acid and water are mixedly configured into a concentration of 25% polymethyl aqueous acid;
B, polyethylene glycol and water are mixedly configured into a concentration of 60% Aqueous Solutions of Polyethylene Glycol;
C, the mixing of the aqueous solution of step a and step b is according to volume ratio 1:2-30 is mixed, stirring to obtain mixed liquor;
D, pH value is controlled within the scope of 1-4 with pH adjusting agent, after stirring fully, ultrasound or discontinuous degassing;
E, above-mentioned mixed liquor is coated in the medial surface of transparent mulch main layer, form the high light penetrating copolymer layer in antifog internal layer,
That is hydrophily anti-fog coating;
F, heat treatment obtains:The temperature range of heat treatment is 80 DEG C, and the time of the heat treatment is 1-2 hours.
7. a kind of weed removal mulch film that moisturizing is biodegradable, it is characterised in that:The biodegradable mulch includes transparent mulch
Main layer and reflective outer layer, transparent mulch main layer by being made following weight percentage components:Fatty poly-ester carbonate 20-40%,
PBAT 50-70%, precipitated calcium carbonate 4-7%, light stabilizer 0.1-2%, lubricant 0.1-2%, heat stabilizer 0.1-2%;
The reflective outer layer by being made following weight percentage components:Reflective glass beads 4-10%, PBAT50-70%,
PLA20-40%, light stabilizer 1-3%, antioxidant 0.5-2%, erucyl amide 0.5-2%;
The reflective glass beads granularity is 1000-1500 mesh.
8. a kind of preparation method of the biodegradable weed removal mulch film of moisturizing described in claim 7, it is characterised in that:Including such as
Lower step:Raw material passes through melt blending, granulation and blown film successively, obtains the biodegradable weed removal mulch film product of moisturizing;
A, after mixing transparent mulch main layer raw material according to the ratio, the transparent mulch main layer is put into twin-screw after mixing and is squeezed
Go out machine, melt blending;
After reflective outer layer raw material is mixed according to the ratio, the reflective outer layer raw material is put into double screw extruder after mixing,
Melt blending;
B, above-mentioned transparent mulch main layer and reflective outer layer raw material are distinguished into extruding pelletization, transparent mulch main layer is made after air-cooled pelletizing
PP Pipe Compound and reflective outer layer PP Pipe Compound;
C. by transparent mulch main layer PP Pipe Compound obtained and the double-deck inflation film manufacturing machine of reflective outer layer PP Pipe Compound input carry out it is compound, squeeze out,
The biodegradable weed removal mulch film of the moisturizing is made in Blown Film.
9. a kind of weed removal mulch film that moisturizing is biodegradable, it is characterised in that:The biodegradable mulch includes transparent mulch
Main layer, reflective outer layer and weeding internal layer, transparent mulch main layer by being made following weight percentage components:Fatty poly-ester carbonate
20-40%, PBAT 50-70%, aerosil 4-7%, light stabilizer 0.1-2%, lubricant 0.1-2%, heat stabilizer
0.1-2%;
The reflective outer layer by being made following weight percentage components:Reflective glass beads 4-10%, PBAT50-70%,
PLA20-40%, light stabilizer 1-3%, antioxidant 0.5-2%, erucyl amide 0.5-2%;
The weeding internal layer is made of nano-silicon dioxide hollow sphere gel coat and herbicide;
The hollow silica ball gel coat is to obtain following preparation method:
A, prepared by the sol solutions of hollow silica ball nano-particle:2-9 parts of polyacrylic acid are dissolved in 45 parts of ammonium hydroxide, ultrasound
Dispersion;It is added dropwise to 900 parts of absolute ethyl alcohol, is uniformly mixed;50 parts of tetraethoxysilane, mixing are added dropwise into mixed liquor
Uniformly, the sol solutions of hollow silica ball nano-particle are obtained.
B, the sol solutions containing the hollow silica ball nano-particle are sprayed on transparent mulch main layer;
The one kind or combinations thereof of the herbicide in Acetochlor, alachlor, butachlor or isopropyl methoxalamine.
10. a kind of preparation method for the weed removal mulch film that moisturizing is biodegradable, it is characterised in that:Include the following steps:Raw material according to
It is secondary to pass through melt blending, granulation, blown film and spraying, obtain the biodegradable weed removal mulch film product of moisturizing;
A, after mixing transparent mulch main layer raw material according to the ratio, the transparent mulch main layer is put into twin-screw after mixing and is squeezed
Go out machine, melt blending;
After reflective outer layer raw material is mixed according to the ratio, the reflective outer layer raw material is put into double screw extruder after mixing,
Melt blending;
B, above-mentioned transparent mulch main layer and reflective outer layer raw material are distinguished into extruding pelletization, transparent mulch main layer is made after air-cooled pelletizing
PP Pipe Compound and reflective outer layer PP Pipe Compound;
C. by transparent mulch main layer PP Pipe Compound obtained and the double-deck inflation film manufacturing machine of reflective outer layer PP Pipe Compound input carry out it is compound, squeeze out,
Blown Film;
D. the sol solutions containing hollow silica ball nano-particle are sprayed on transparent mulch main layer, obtain nanometer titanium dioxide
Silicon hollow ball gel coat, herbicide even application is adsorbed in nano-silicon dioxide hollow sphere gel coat, is had
The Biodegradable mulch of weeding function.
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