CN113773622A - Transparent non-dropping full-biodegradable mulching film and preparation method thereof - Google Patents
Transparent non-dropping full-biodegradable mulching film and preparation method thereof Download PDFInfo
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- CN113773622A CN113773622A CN202111098351.7A CN202111098351A CN113773622A CN 113773622 A CN113773622 A CN 113773622A CN 202111098351 A CN202111098351 A CN 202111098351A CN 113773622 A CN113773622 A CN 113773622A
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- 238000002360 preparation method Methods 0.000 title abstract description 22
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 83
- 239000002362 mulch Substances 0.000 claims abstract description 38
- 229920001896 polybutyrate Polymers 0.000 claims abstract description 15
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 14
- 239000004626 polylactic acid Substances 0.000 claims abstract description 14
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 12
- 239000012760 heat stabilizer Substances 0.000 claims abstract description 12
- 239000003381 stabilizer Substances 0.000 claims abstract description 12
- 239000002216 antistatic agent Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000000945 filler Substances 0.000 claims abstract description 9
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 8
- 239000006082 mold release agent Substances 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims description 38
- 239000008187 granular material Substances 0.000 claims description 20
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 11
- 238000005303 weighing Methods 0.000 claims description 11
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 claims description 6
- 239000002202 Polyethylene glycol Substances 0.000 claims description 4
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims description 4
- 239000012188 paraffin wax Substances 0.000 claims description 4
- 229920001223 polyethylene glycol Polymers 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- 235000021355 Stearic acid Nutrition 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- CEGOLXSVJUTHNZ-UHFFFAOYSA-K aluminium tristearate Chemical compound [Al+3].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CEGOLXSVJUTHNZ-UHFFFAOYSA-K 0.000 claims description 3
- 229940063655 aluminum stearate Drugs 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 3
- 239000008116 calcium stearate Substances 0.000 claims description 3
- 235000013539 calcium stearate Nutrition 0.000 claims description 3
- 235000019359 magnesium stearate Nutrition 0.000 claims description 3
- 229940057948 magnesium stearate Drugs 0.000 claims description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 3
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 claims description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- 229940114930 potassium stearate Drugs 0.000 claims description 3
- ANBFRLKBEIFNQU-UHFFFAOYSA-M potassium;octadecanoate Chemical compound [K+].CCCCCCCCCCCCCCCCCC([O-])=O ANBFRLKBEIFNQU-UHFFFAOYSA-M 0.000 claims description 3
- 239000008117 stearic acid Substances 0.000 claims description 3
- 229960004274 stearic acid Drugs 0.000 claims description 3
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 35
- 238000006065 biodegradation reaction Methods 0.000 abstract description 20
- 230000015556 catabolic process Effects 0.000 abstract description 18
- 238000006731 degradation reaction Methods 0.000 abstract description 18
- 239000002689 soil Substances 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 10
- 230000035784 germination Effects 0.000 abstract description 5
- 239000002985 plastic film Substances 0.000 abstract description 5
- 229920006255 plastic film Polymers 0.000 abstract description 3
- 229920000704 biodegradable plastic Polymers 0.000 abstract description 2
- 239000012466 permeate Substances 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 description 18
- 238000001125 extrusion Methods 0.000 description 16
- 239000012768 molten material Substances 0.000 description 12
- 238000010096 film blowing Methods 0.000 description 10
- 238000005469 granulation Methods 0.000 description 9
- 230000003179 granulation Effects 0.000 description 9
- 238000009864 tensile test Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 239000000306 component Substances 0.000 description 6
- -1 fatty acid ester Chemical class 0.000 description 5
- 235000011187 glycerol Nutrition 0.000 description 4
- GXGAKHNRMVGRPK-UHFFFAOYSA-N dimagnesium;dioxido-bis[[oxido(oxo)silyl]oxy]silane Chemical group [Mg+2].[Mg+2].[O-][Si](=O)O[Si]([O-])([O-])O[Si]([O-])=O GXGAKHNRMVGRPK-UHFFFAOYSA-N 0.000 description 3
- 239000000391 magnesium silicate Substances 0.000 description 3
- 229940099273 magnesium trisilicate Drugs 0.000 description 3
- 229910000386 magnesium trisilicate Inorganic materials 0.000 description 3
- 235000019793 magnesium trisilicate Nutrition 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 241000700605 Viruses Species 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 1
- WSQZNZLOZXSBHA-UHFFFAOYSA-N 3,8-dioxabicyclo[8.2.2]tetradeca-1(12),10,13-triene-2,9-dione Chemical compound O=C1OCCCCOC(=O)C2=CC=C1C=C2 WSQZNZLOZXSBHA-UHFFFAOYSA-N 0.000 description 1
- 241000186361 Actinobacteria <class> Species 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 241000204031 Mycoplasma Species 0.000 description 1
- 241000235342 Saccharomycetes Species 0.000 description 1
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 239000007857 degradation product Substances 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010101 extrusion blow moulding Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 229920000223 polyglycerol Polymers 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/101—Esters; Ether-esters of monocarboxylic acids
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Biological Depolymerization Polymers (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a transparent non-drop full-biodegradable mulch film and a preparation method thereof, wherein the transparent non-drop full-biodegradable mulch film prepared by the method comprises the following steps: 70-85% of PBAT, 4-10% of polylactic acid, 1-3% of stabilizer, 3-7% of heat stabilizer, 0.5-1.5% of antistatic agent, 0.3-0.7% of antioxidant, 0.3-0.7% of mold release agent, 1.5-2% of dripping agent, 1-2% of antifogging agent and 3-7% of filler; this transparent no-drip full biodegradable plastic film has better mechanical properties, long service life, and the suitability is high, can not produce even white drop of water when the difference in temperature is great round the clock, and fog dispersal time is long, and fog dispersal rate is high, and light transmissivity is good for infrared and far infrared ray in the sunshine permeate through the plastic film and impel soil to heat, promote crops early germination, prevent that the seed from rotting, and satisfy the national full biodegradation standard, and degradation efficiency is high, and degradation effect is good, can not cause white pollution.
Description
Technical Field
The invention relates to the technical field of degradable materials, in particular to a transparent non-dropping full-biodegradable mulching film and a preparation method thereof.
Background
The transparent agricultural mulching film is usually used in winter or at a low temperature, can be permeated by infrared light and far infrared light in the daytime, enables the temperature of the land to rise, has a heat preservation effect on the land at night, and can cause harm such as slow germination, root rot and the like of crops if heat preservation measures are not taken for the crops; when the temperature of the land is raised to 0.5 ℃ due to mulching, crops can sprout 10-15 days in advance, and the germination rate of the crops can reach 95%.
The current ordinary full biodegradable plastic film can produce the drop of water in the one side of plastic film towards the soil owing to the difference in temperature round the clock, and the drop of water can produce reflection and scattering to sunshine the next day for infrared, far infrared's light transmissivity is low, and the soil heats the effect poorly, is unfavorable for the heat preservation of plastic film.
Disclosure of Invention
The invention aims to provide a transparent non-dropping full-biodegradable mulching film and a preparation method thereof, and aims to solve the problem that water drops are generated in the conventional mulching film.
In order to achieve the purpose, the invention adopts the following technical scheme:
a transparent non-dropping full-biodegradable mulching film is provided with one layer or a plurality of layers which are arranged in sequence, and at least one layer comprises the following components in percentage by weight:
70-85% of PBAT, 4-10% of polylactic acid, 1-3% of stabilizer, 3-7% of heat stabilizer, 0.5-1.5% of antistatic agent, 0.3-0.7% of antioxidant, 0.3-0.7% of mold release agent, 1.5-2% of dripping agent, 1-2% of antifogging agent and 3-7% of filler.
Preferably, the thickness of the transparent non-drip fully biodegradable mulching film is 0.01-0.015 mm, the tensile strength is more than or equal to 15mPa, the longitudinal elongation at break is more than or equal to 350%, and the transverse elongation at break is more than or equal to 400%.
Preferably, the inner layer, the middle layer and the outer layer are provided, and the inner layer and the middle layer respectively comprise the following components in percentage by weight:
70-85% of PBAT, 4-10% of polylactic acid, 1-3% of stabilizer, 3-7% of heat stabilizer, 0.5-1.5% of antistatic agent, 0.3-0.7% of antioxidant, 0.3-0.7% of mold release agent, 1.5-2% of dripping agent, 1-2% of antifogging agent and 3-7% of filler;
the outer layer comprises the following components in percentage by weight:
72 to 85 percent of PBAT, 4 to 10 percent of polylactic acid, 1 to 3 percent of stabilizer, 3 to 7 percent of heat stabilizer, 0.5 to 1.5 percent of antistatic agent, 0.3 to 0.7 percent of antioxidant, 0.3 to 0.7 percent of release agent and 3 to 7 percent of filler.
Preferably, the stabilizing agent comprises a mixture of one or more of stearic acid, magnesium stearate, aluminum stearate and potassium stearate which are mixed uniformly in any proportion.
Preferably, the heat stabilizer is a mixture of one or more of calcium stearate and zinc stearate which are uniformly mixed in any proportion.
Preferably, the antistatic agent is a mixture of one or more of sulfate, phosphate and polyethylene glycol which are uniformly mixed in any proportion.
Preferably, the release agent is a mixture of one or more of oleamide, paraffin and glycerol which are mixed uniformly in any proportion.
The method for preparing the transparent non-drop full-biodegradable mulching film is characterized by comprising the following steps of,
s1: weighing the raw materials according to the weight percentage, uniformly mixing the raw materials, and extruding the mixture into granules by a double-screw extruder;
s2: and (S1) blowing the granules to obtain the transparent non-dripping full-biodegradable mulching film.
Preferably, the film blowing temperature in step S2 is 150 to 170 ℃.
Preferably, the granules are formed into a film by a screw extruder, and the number of screws is corresponding to the number of the layers of the transparent non-dropping full-biodegradable mulching film.
Compared with the prior art, the invention has the beneficial effects that:
according to the technical scheme, the transparent non-drop full-biodegradable mulching film prepared by the method does not generate continuous water drops when the temperature difference between day and night is large, the light transmittance is good, the fog dissipation time is long, the germination rate of crops is high, the national full-biodegradation standard is met, the degradation efficiency is high, the degradation effect is good, and white pollution is avoided.
Detailed Description
The present invention will be described in greater detail below, it being understood that the following description of the present invention is illustrative only and is not limiting. The various embodiments may be combined with each other to form other embodiments not shown in the following description.
The embodiment of the invention provides a transparent non-drip fully biodegradable mulching film, which is formed by sequentially arranging an inner layer, a middle layer and an outer layer, wherein the thickness of the transparent non-drip fully biodegradable mulching film is 0.01-0.015 mm, the tensile strength is more than or equal to 15mPa, the longitudinal breaking elongation is more than or equal to 350%, the transverse breaking elongation is more than or equal to 400%, and the transparent non-drip fully biodegradable mulching film comprises the following components: PBAT, polylactic acid, a stabilizer, a heat stabilizer, an antistatic agent, an antioxidant, a mold release agent, a dripping agent, an antifogging agent and a filler; wherein, in order to save the cost on the premise of ensuring the effect, the dripping agent and the antifogging agent are only added into the inner layer and the middle layer.
Wherein PBAT is the main component of the transparent non-drip full-biodegradable mulching film, mainly comprises a copolymer of poly-adipic acid and butylene terephthalate, and the mass fraction is controlled to be 72-85%.
The mass fraction of the polylactic acid is controlled to be 4-10%, the polylactic acid has good compatibility and biodegradability, can be completely degraded by microorganisms after being used, finally generates carbon dioxide and water, and avoids polluting the environment.
The stabilizer mainly comprises one or more of stearic acid, magnesium stearate, aluminum stearate and potassium stearate which are mixed uniformly in any proportion, the mass fraction is controlled to be 1-3%, and the stabilizer can slow down the reaction, keep chemical balance, reduce the surface tension, prevent the effects of light, thermal decomposition or oxidative decomposition and the like in the film blowing production.
The heat stabilizer comprises one or more of calcium stearate and zinc stearate, the mass percentage is controlled to be 3% -7%, and substances with catalytic action on non-chain fracture can be eliminated due to the heat stabilizer, so that the ageing resistance is further improved.
The antistatic agent comprises one or more of sulfate, phosphate and polyethylene glycol which are mixed uniformly in any proportion, the mass fraction is controlled to be 0.5-1.5%, the static accumulation purpose can be reduced, and the transparent non-drip full-biodegradable mulching film is prevented from rolling up under the action of the static accumulation purpose in the use process to influence the use effect.
The release agent is a mixture of one or more of oleamide, paraffin and glycerol which are uniformly mixed in any proportion, the mass percentage is controlled to be 0.3-0.7%, and the transparent non-drip full-biodegradable mulching film is prevented from being bonded with a machine during forming.
The filler is magnesium trisilicate, the mass percent is controlled to be 3% -7%, the magnesium trisilicate has a decoloring effect, and the visibility of the transparent non-dripping full-biodegradable mulching film can be improved by adding a certain amount of magnesium trisilicate.
The antifogging agent and the dripping agent are core components of the transparent non-drip fully biodegradable mulching film, wherein the dripping agent can destroy the interfacial tension between water drops and the inner layer of the transparent non-drip fully biodegradable mulching film and prevent the water drops from being formed on the surface of the inner layer, the dripping agent can be usually polyglycerol fatty acid ester or glycerin monostearate and the like, the mass percentage is controlled to be 1.5-2%, because the thickness of the transparent non-drip fully biodegradable mulching film is 0.01-0.015 mm, the content of the dripping agent is not more than 2%, otherwise, the degradation rate of the transparent non-drip fully biodegradable mulching film can be influenced; the mass percentage of the antifogging agent is controlled to be 1-2 per mill, and the cooperation of the antifogging agent and the dripping agent can effectively improve the interfacial tension between the transparent non-dripping full-biodegradable mulching film and water drops and prevent the water drops from being formed on the inner surface of the transparent non-dripping full-biodegradable mulching film.
The degradation performance of the transparent non-drop full-biodegradable mulching film meets the national standard of full biodegradation, after the transparent non-drop full-biodegradable mulching film is used, the transparent non-drop full-biodegradable mulching film can be degraded in a soil piling mode, and is degraded by using bacteria, mould, saccharomycetes, mycoplasma, viruses, actinomycetes, algae, viruses and other microorganisms in soil, so that the transparent non-drop full-biodegradable mulching film has a high degradation rate, a good degradation effect, recyclable degradation products, energy conservation, greenness and environmental protection.
The invention also provides a preparation method of the transparent non-dripping full-biodegradable mulching film, which comprises the following steps:
s1: weighing the raw materials corresponding to the inner layer, the middle layer and the outer layer according to the weight percentage, and putting the raw materials into a double-screw extruder for granulation;
s2: and (4) respectively putting the granules obtained in the step (S1) into raw material ports corresponding to a three-screw extruder, firstly, changing the granules into molten state at the temperature of 150-170 ℃, and carrying out three-layer co-extrusion film blowing on the molten raw materials to obtain the transparent non-dripping full-biodegradable mulching film.
The thickness of the transparent non-drop full-biodegradable mulching film obtained by the method is 0.01-0.015 mm, the tensile strength is more than or equal to 15mPa, the longitudinal breaking elongation is more than or equal to 350%, and the transverse breaking elongation is more than or equal to 400%.
The transparent non-drip fully biodegradable mulch film provided by the present application will be further illustrated with reference to the following examples.
Example one
The content of the transparent non-drip fully biodegradable mulch film in this example is shown in table 1:
(the content of the antifogging agent is too low, the total content of the transparent non-drop full-biodegradable mulching film is not counted)
TABLE 1
The transparent non-dripping full-biodegradable mulching film in the embodiment is prepared by the following preparation method, and comprises the following steps:
s1: weighing corresponding raw materials according to the weight percentage, and respectively putting the raw materials into a double-screw extruder for extrusion and granulation;
s2: and (4) respectively putting the granules obtained in the step (S1) into corresponding raw material ports of a single-screw extruder, firstly, changing the granules into molten materials at the temperature of 150 ℃, and carrying out co-extrusion film blowing on the molten materials to obtain the transparent non-dropping full-biodegradable mulching film.
The thickness of the transparent non-drip fully biodegradable mulching film obtained in the embodiment is 0.01mm, and the tensile strength of the transparent non-drip fully biodegradable mulching film is 15mPa, the longitudinal elongation at break is 350%, and the transverse elongation at break is 400% according to a tensile test; the transparent non-dropping full-biodegradable mulching film has excellent mechanical property and good ductility, and can adapt to the covering of different crops.
The transparent non-drop full-biodegradable mulching film obtained by the embodiment is used for a full-biodegradation experiment, the transparent non-drop full-biodegradable mulching film with the area of one square meter is put into 1kg of soil, can be degraded for 90% in about 90-120 days, can be completely degraded for about 150 days without residue, meets the national full-biodegradation standard, is high in degradation rate, does not produce white pollution, and has extremely high popularization and application performance.
In a farmland with the day-night temperature difference of 5-10 ℃ in winter, a comparison experiment is carried out by adopting the transparent non-drip fully biodegradable mulching film and a common biodegradable mulching film, the covering time, the covering place and the types of crops are the same, the preparation method of the common biodegradable mulching film is the same as that of the first embodiment, and the difference is that no dripping agent and no antifogging agent are added, after the transparent non-drip fully biodegradable mulching film and the common biodegradable mulching film which are not added with the dripping agent and the antifogging agent are covered for the same time, the quantity of water drops of the transparent non-drip fully biodegradable mulching film and the common biodegradable mulching film which are not added with the dripping agent and the antifogging agent are observed for the same area at the same time and the same area, so that a large number of densely distributed connected water drops are generated on the common fully biodegradable mulching film, and no obvious water drops are generated on the transparent non-drip fully biodegradable mulching film.
Example two
The content of the transparent non-drip fully biodegradable mulch film in this example is shown in table 2:
(the content of the antifogging agent is too low, the total content of the transparent non-drop full-biodegradable mulching film is not counted)
TABLE 2
The transparent non-dripping full-biodegradable mulching film in the embodiment is prepared by the following preparation method, and comprises the following steps:
s1: weighing corresponding raw materials according to the weight percentage, and respectively putting the raw materials into a double-screw extruder for extrusion and granulation;
s2: and (4) respectively putting the granules obtained in the step (S1) into corresponding raw material ports of a double-screw extruder, firstly, changing the granules into molten materials at the temperature of 150 ℃, and carrying out co-extrusion film blowing on the molten materials to obtain the transparent non-dropping full-biodegradable mulching film.
The thickness of the transparent non-drip fully biodegradable mulching film obtained in the embodiment is 0.01mm, and the tensile strength of the transparent non-drip fully biodegradable mulching film is 15mPa, the longitudinal elongation at break is 350%, and the transverse elongation at break is 400% according to a tensile test; the transparent non-dropping full-biodegradable mulching film has excellent mechanical property and good ductility, and can adapt to the covering of different crops.
The transparent non-drop full-biodegradable mulching film obtained by the embodiment is used for a full-biodegradation experiment, the transparent non-drop full-biodegradable mulching film with the area of one square meter is put into 1kg of soil, can be degraded for 90% in about 90-120 days, can be completely degraded for about 150 days without residue, meets the national full-biodegradation standard, is high in degradation rate, does not produce white pollution, and has extremely high popularization and application performance.
In the farmland with the day and night temperature difference of 5-10 ℃ in winter, the transparent non-drip fully biodegradable mulching film and the common biodegradable mulching film are used for comparison experiments, the covering time, the covering place and the types of crops are the same, the preparation method of the common mulching film is the same as the embodiment, and the difference is that no dripping agent and no antifogging agent are added, after the common mulching film is covered for the same time, the quantity of water drops of the transparent non-drip fully biodegradable mulching film and the common biodegradable mulching film which is not added with the dripping agent and the antifogging agent and has the same area are observed in the same time and the same area, so that a large number of densely distributed connected water drops are generated on the common fully biodegradable mulching film, and no obvious water drops are generated on the transparent non-drip fully biodegradable mulching film.
EXAMPLE III
The content of the transparent non-drip fully biodegradable mulch film in this example is shown in table 3:
(the content of the antifogging agent is too low, the total content of the transparent non-drop full-biodegradable mulching film is not counted)
TABLE 3
The transparent non-dripping full-biodegradable mulching film in the embodiment is prepared by the following preparation method, and comprises the following steps:
s1: respectively weighing the raw materials corresponding to the inner layer, the middle layer and the outer layer according to the weight percentage, and respectively putting the raw materials into a double-screw extruder for extrusion and granulation;
s2: and (4) respectively putting the granules obtained in the step (S1) into raw material ports corresponding to a three-screw extruder, firstly, changing the granules into molten materials at the temperature of 150 ℃, and carrying out three-layer co-extrusion film blowing on the molten materials to obtain the transparent non-dropping full-biodegradable mulching film.
The thickness of the transparent non-drip fully biodegradable mulching film obtained in the embodiment is 0.01mm, and the tensile strength of the transparent non-drip fully biodegradable mulching film is 15mPa, the longitudinal elongation at break is 350%, and the transverse elongation at break is 400% according to a tensile test; the transparent non-dropping full-biodegradable mulching film has excellent mechanical property and good ductility, and can adapt to the covering of different crops.
The transparent non-drop full-biodegradable mulching film obtained by the embodiment is used for a full-biodegradation experiment, the transparent non-drop full-biodegradable mulching film with the area of one square meter is put into 1kg of soil, can be degraded for 90% in about 90-120 days, can be completely degraded for about 150 days without residue, meets the national full-biodegradation standard, is high in degradation rate, does not produce white pollution, and has extremely high popularization and application performance.
The transparent non-drip fully biodegradable mulch film and the common biodegradable mulch film are adopted to carry out a comparison experiment in a farmland with the day and night temperature difference of 5-10 ℃ in winter, the covering time, the place and the types of crops are the same, the preparation method of the common biodegradable mulch film is the same as the three phases of the embodiment, and the difference is that no dripping agent and no antifogging agent are added, after the transparent non-drip fully biodegradable mulch film and the common biodegradable mulch film are covered for the same time, the number of water drops of the transparent non-drip fully biodegradable mulch film and the common biodegradable mulch film without the dripping agent and the antifogging agent in the same area are observed in the same time and the same area, and therefore, a large number of densely distributed connected water drops are generated on the common fully biodegradable mulch film, and no obvious water drops are generated on the transparent non-drip fully biodegradable mulch film.
Example four
The content of the transparent non-drip fully biodegradable mulch film in this example is as follows 4:
(the content of the antifogging agent is too low, the total content of the transparent non-drop full-biodegradable mulching film is not counted)
TABLE 4
| PBAT | Polylactic acid | Aluminium stearate | Calcium stearate | Magnesium trisilicate | Quaternary ammonium salts | Antioxidant agent | Paraffin wax | Drip agent | Fog eliminating agent | |
| Inner layer | 75％ | 7.1％ | 1％ | 7％ | 7％ | 0.5％ | 0.3％ | 0.5％ | 1.6％ | 1.2‰ |
| Middle layer | 75％ | 7.1％ | 1％ | 7％ | 7％ | 0.5％ | 0.3％ | 0.5％ | 1.6％ | 1.2‰ |
| Outer layer | 75％ | 8.8％ | 1％ | 7％ | 7％ | 0.5％ | 0.3％ | 0.5％ | - | - |
The transparent non-dripping full-biodegradable mulching film in the embodiment is prepared by the following preparation method, and comprises the following steps:
s1: respectively weighing the raw materials corresponding to the inner layer, the middle layer and the outer layer according to the weight percentage, and respectively putting the raw materials into a double-screw extruder for extrusion and granulation;
s2: and (4) respectively putting the mixed raw materials obtained in the step (S1) into raw material ports corresponding to a three-screw extruder, firstly enabling the granules to be molten at the temperature of 155 ℃, and carrying out three-layer co-extrusion blow molding on the molten raw materials to form a film so as to obtain the transparent non-dripping full-biodegradable mulching film.
The thickness of the transparent non-drip fully biodegradable mulching film obtained in the embodiment is 0.011mm, and the tensile strength of the transparent non-drip fully biodegradable mulching film is 20mPa, the longitudinal elongation at break is 360%, and the transverse elongation at break is 410% according to a tensile test; the transparent non-dropping full-biodegradable mulching film has excellent mechanical property and good ductility, and can adapt to the covering of different crops.
The transparent non-drop full-biodegradable mulching film obtained by the embodiment is used for a full-biodegradation experiment, the transparent non-drop full-biodegradable mulching film with the area of one square meter is put into 1kg of soil, can be degraded for 90% in about 90-120 days, can be completely degraded for about 150 days without residue, meets the national full-biodegradation standard, is high in degradation rate, does not produce white pollution, and has extremely high popularization and application performance.
In a farmland with the day and night temperature difference of 5-10 ℃ in winter, a comparison experiment is carried out by adopting the transparent non-drip fully biodegradable mulching film and a common biodegradable mulching film, the covering time, the covering place and the types of crops are the same, the preparation method of the common biodegradable mulching film is the same as the fourth embodiment, and the difference is that no dripping agent and no antifogging agent are added, after the transparent non-drip fully biodegradable mulching film and the common biodegradable mulching film which are not added with the dripping agent and the antifogging agent are covered for the same time, the water drop quantity of the transparent non-drip fully biodegradable mulching film and the common biodegradable mulching film which are not added with the dripping agent and the antifogging agent in the same area are observed in the same time and the same area, so that a large number of densely distributed connected water drops are generated on the common fully biodegradable mulching film, and no obvious water drops are generated on the transparent non-drip fully biodegradable mulching film.
EXAMPLE five
The content of the transparent non-drip fully biodegradable mulch film in this example is as follows:
(the content of the antifogging agent is too low, the total content of the transparent non-drop full-biodegradable mulching film is not counted)
TABLE 5
| PBAT | Polylactic acid | Stearic acid | Calcium stearate | Magnesium trisilicate | Polyethylene glycol | Antioxidant agent | Oleic acid amides | Drip agent | Fog eliminating agent | |
| Inner layer | 82％ | 5％ | 1％ | 5％ | 3.3％ | 1％ | 0.5％ | 0.5％ | 1.7％ | 1.4‰ |
| Middle layer | 82％ | 5％ | 1％ | 5％ | 3.3％ | 1％ | 0.5％ | 0.5％ | 1.7％ | 1.4‰ |
| Outer layer | 82％ | 5％ | 1％ | 5％ | 5％ | 82％ | 0.5％ | 0.5％ | - | - |
The transparent non-dripping full-biodegradable mulching film in the embodiment is prepared by the following preparation method, and comprises the following steps:
s1: respectively weighing the raw materials corresponding to the inner layer, the middle layer and the outer layer according to the weight percentage, and respectively putting the raw materials into a double-screw extruder for extrusion and granulation;
s2: respectively putting the mixed raw materials obtained in the step S1 into raw material ports corresponding to a three-screw extruder, and firstly, enabling the granules to be molten at 162 ℃;
s3: and (4) carrying out three-layer co-extrusion film blowing on the molten raw material obtained in the step S2 to obtain the transparent non-dripping full-biodegradable mulching film.
The thickness of the transparent non-drip fully biodegradable mulching film obtained in the embodiment is 0.013mm, and the tensile strength of the transparent non-drip fully biodegradable mulching film is 25mPa, the longitudinal elongation at break is 370%, and the transverse elongation at break is 420% through tensile testing; the transparent non-dropping full-biodegradable mulching film has excellent mechanical property and good ductility, and can adapt to the covering of different crops.
The transparent non-drop full-biodegradable mulching film obtained by the embodiment is used for a full-biodegradation experiment, the transparent non-drop full-biodegradable mulching film with the area of one square meter is put into 1kg of soil, can be degraded for 90% in about 90-120 days, can be completely degraded for about 150 days without residue, meets the national full-biodegradation standard, is high in degradation rate, does not produce white pollution, and has extremely high popularization and application performance.
In a farmland with the day-night temperature difference of 5-10 ℃ in winter, a comparison experiment is carried out by adopting the transparent non-drip fully biodegradable mulching film and a common biodegradable mulching film, the covering time, the covering place and the types of crops are the same, the preparation method of the common biodegradable mulching film is the same as that of the fifth embodiment, and the difference is that no dripping agent and no antifogging agent are added, after the transparent non-drip fully biodegradable mulching film and the common biodegradable mulching film are covered for the same time, the quantity of water drops of the transparent non-drip fully biodegradable mulching film and the common biodegradable mulching film which are not added with the dripping agent and the antifogging agent are observed in the same area at the same time, so that a large number of densely distributed connected water drops are generated on the common fully biodegradable mulching film, and no obvious water drops are generated on the transparent non-drip fully biodegradable mulching film.
EXAMPLE six
The content of the transparent non-drip fully biodegradable mulch film in this example is as follows:
(the content of the antifogging agent is too low, the total content of the transparent non-drop full-biodegradable mulching film is not counted)
TABLE 6
| PBAT | Polylactic acid | Stearic acid | Calcium stearate | Magnesium trisilicate | Phosphoric acid esters | Antioxidant agent | Glycerol | Drip agent | Fog eliminating agent | |
| Inner layer | 85％ | 4％ | 1％ | 3％ | 3％ | 1％ | 0.7％ | 0.3％ | 2％ | 2‰ |
| Middle layer | 85％ | 4％ | 1％ | 3％ | 3％ | 1％ | 0.7％ | 0.3％ | 2％ | 2‰ |
| Outer layer | 85％ | 4％ | 2.5％ | 3％ | 3％ | 1.5％ | 0.7％ | 0.3％ | - | - |
The transparent non-dripping full-biodegradable mulching film in the embodiment is prepared by the following preparation method, and comprises the following steps:
s1: respectively weighing the raw materials corresponding to the inner layer, the middle layer and the outer layer according to the weight percentage, and respectively putting the raw materials into a double-screw extruder for extrusion and granulation;
s2: and (4) respectively putting the mixed raw materials obtained in the step (S1) into raw material ports corresponding to a three-screw extruder, firstly, changing the granules into molten materials at the temperature of 170 ℃, and carrying out three-layer co-extrusion film blowing on the molten materials to obtain the transparent non-dripping full-biodegradable mulching film.
The thickness of the transparent non-dropping full-biodegradable mulching film obtained in the embodiment is 0.015mm, and the tensile strength of the transparent non-dropping full-biodegradable mulching film is 30mPa, the longitudinal elongation at break of the transparent non-dropping full-biodegradable mulching film is 380% and the transverse elongation at break of the transparent non-dropping full-biodegradable mulching film is 430% according to a tensile test; the transparent non-dropping full-biodegradable mulching film has excellent mechanical property and good ductility, and can adapt to the covering of different crops.
The transparent non-drop full-biodegradable mulching film obtained by the embodiment is used for a full-biodegradation experiment, the transparent non-drop full-biodegradable mulching film with the area of one square meter is put into 1kg of soil, can be degraded for 90% in about 90-120 days, can be completely degraded for about 150 days without residue, meets the national full-biodegradation standard, is high in degradation rate, does not produce white pollution, and has extremely high popularization and application performance.
In a farmland with the day and night temperature difference of 5-10 ℃ in winter, a comparison experiment is carried out by adopting the transparent non-drip fully biodegradable mulching film and a common biodegradable mulching film, the covering time, the covering place and the types of crops are the same, the preparation method of the common biodegradable mulching film is the same as that of the embodiment sixth, and the difference is that no dripping agent and no antifogging agent are added, after the transparent non-drip fully biodegradable mulching film and the common biodegradable mulching film which are not added with the dripping agent and the antifogging agent are covered for the same time, the quantity of water drops of the transparent non-drip fully biodegradable mulching film and the common biodegradable mulching film which are not added with the dripping agent and the antifogging agent are observed in the same area at the same time and the same area, so that a large number of densely distributed connected water drops are generated on the common fully biodegradable mulching film, and no obvious water drops are generated on the transparent non-drip fully biodegradable mulching film.
In a first comparative experiment, a transparent non-dripping full-biodegradable mulching film is prepared by the same method as in the first comparative example, wherein the content of PBAT in the inner layer and the middle layer of the first comparative example is 69%, and the content is as follows in the following table 5:
comparative example 1
The content of the transparent non-drip fully biodegradable mulch film in this example is shown in table 7:
(the content of the antifogging agent is too low, the total content of the transparent non-drop full-biodegradable mulching film is not counted)
TABLE 7
The transparent non-dripping full-biodegradable mulching film in the embodiment is prepared by the following preparation method, and comprises the following steps:
s1: respectively weighing the raw materials corresponding to the inner layer, the middle layer and the outer layer according to the weight percentage, and respectively putting the raw materials into a double-screw extruder for extrusion and granulation;
s2: and (4) respectively putting the granules obtained in the step (S1) into raw material ports corresponding to a three-screw extruder, firstly, changing the granules into molten materials at the temperature of 160 ℃, and carrying out three-layer co-extrusion film blowing on the molten materials to obtain the transparent non-dropping full-biodegradable mulching film.
The thickness of the transparent non-dropping full-biodegradable mulching film obtained in the embodiment is 0.008mm, and the tensile strength of the transparent non-dropping full-biodegradable mulching film is 12mPa, the longitudinal elongation at break is 330%, and the transverse elongation at break is 380% according to a tensile test.
The transparent non-drop full-biodegradable mulching film obtained by the embodiment is used for a full-biodegradation experiment, the transparent non-drop full-biodegradable mulching film with the area of one square meter is put into 1kg of soil, can be degraded for 90% in about 90-120 days, can be completely degraded for about 150 days without residue, meets the national full-biodegradation standard, is high in degradation rate, does not produce white pollution, and has extremely high popularization and application performance.
The transparent non-drip fully biodegradable mulch film and the common biodegradable mulch film are adopted to carry out a comparison experiment in a farmland with the day and night temperature difference of 5-10 ℃ in winter, the covering time, the place and the types of crops are the same, the preparation method of the common biodegradable mulch film is the same as the three phases of the embodiment, and the difference is that no dripping agent and no antifogging agent are added, after the transparent non-drip fully biodegradable mulch film and the common biodegradable mulch film are covered for the same time, the number of water drops of the transparent non-drip fully biodegradable mulch film and the common biodegradable mulch film without the dripping agent and the antifogging agent in the same area are observed in the same time and the same area, and therefore, a large number of densely distributed connected water drops are generated on the common fully biodegradable mulch film, and no obvious water drops are generated on the transparent non-drip fully biodegradable mulch film.
A second comparative experiment was conducted, and the transparent non-drip fully biodegradable mulch film was prepared in the same manner as in example six, except that the PBAT content of the second comparative example was 86%, and the content was as follows in table 6:
comparative example No. two
The content of the transparent non-drip fully biodegradable mulch film in this example is as follows:
(the content of the antifogging agent is too low, the total content of the transparent non-drop full-biodegradable mulching film is not counted)
TABLE 8
| PBAT | Polylactic acid | Stearic acid | Calcium stearate | Magnesium trisilicate | Phosphoric acid esters | Antioxidant agent | Glycerol | Drip agent | Fog eliminating agent | |
| Inner layer | 86％ | 4％ | 1％ | 3％ | 3％ | 1％ | 0.5％ | 0.5％ | 1％ | 2‰ |
| Middle layer | 86％ | 4％ | 1％ | 3％ | 3％ | 1％ | 0.5％ | 0.5％ | 1％ | 2‰ |
| Outer layer | 86％ | 4％ | 1％ | 3％ | 4％ | 1％ | 0.5％ | 0.5％ | - | - |
The transparent non-dripping full-biodegradable mulching film in the embodiment is prepared by the following preparation method, and comprises the following steps:
s1: respectively weighing the raw materials corresponding to the inner layer, the middle layer and the outer layer according to the weight percentage, and respectively putting the raw materials into a double-screw extruder for extrusion and granulation;
s2: and (4) respectively putting the mixed raw materials obtained in the step (S1) into raw material ports corresponding to a three-screw extruder, firstly, changing the granules into molten materials at the temperature of 170 ℃, and carrying out three-layer co-extrusion film blowing on the molten materials to obtain the transparent non-dripping full-biodegradable mulching film.
The thickness of the transparent non-drip fully biodegradable mulching film obtained in the embodiment is 0.02mm, and the tensile strength of the transparent non-drip fully biodegradable mulching film is 13mPa, the longitudinal elongation at break is 340%, and the transverse elongation at break is 390% according to a tensile test.
The transparent non-drop full-biodegradable mulching film obtained by the embodiment is used for a full-biodegradation experiment, the transparent non-drop full-biodegradable mulching film with the area of one square meter is put into 1kg of soil, can be degraded for 90% in about 90-120 days, can be completely degraded for about 150 days without residue, meets the national full-biodegradation standard, is high in degradation rate, does not produce white pollution, and has extremely high popularization and application performance.
In a farmland with the day and night temperature difference of 5-10 ℃ in winter, a comparison experiment is carried out by adopting the transparent non-drip fully biodegradable mulching film and a common biodegradable mulching film, the covering time, the covering place and the types of crops are the same, the preparation method of the common biodegradable mulching film is the same as that of the embodiment sixth, and the difference is that no dripping agent and no antifogging agent are added, after the transparent non-drip fully biodegradable mulching film and the common biodegradable mulching film which are not added with the dripping agent and the antifogging agent are covered for the same time, the quantity of water drops of the transparent non-drip fully biodegradable mulching film and the common biodegradable mulching film which are not added with the dripping agent and the antifogging agent are observed in the same area at the same time and the same area, so that a large number of densely distributed connected water drops are generated on the common fully biodegradable mulching film, and no obvious water drops are generated on the transparent non-drip fully biodegradable mulching film.
The performances of the transparent non-drop full-biodegradable mulching film prepared from the components are shown in a table 9:
TABLE 9
By the above embodiment, it can be derived that:
the transparent non-drop full-biodegradable mulching film prepared by the method has the advantages of good mechanical property, long service life, high applicability, no water drop when the temperature difference between day and night is large, good light transmittance, long fog dissipation time, high fog dissipation rate, high germination rate of crops, high degradation efficiency and good degradation effect, and can meet the national full-biodegradation standard without causing white pollution.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. The transparent non-drop full-biodegradable mulching film is characterized by being arranged into one layer or a plurality of layers which are arranged in sequence, wherein at least one layer comprises the following components in percentage by weight:
70-85% of PBAT, 4-10% of polylactic acid, 1-3% of stabilizer, 3-7% of heat stabilizer, 0.5-1.5% of antistatic agent, 0.3-0.7% of antioxidant, 0.3-0.7% of mold release agent, 1.5-2% of dripping agent, 1-2% of antifogging agent and 3-7% of filler.
2. The transparent non-drip fully biodegradable mulch film according to claim 1, wherein the thickness of the transparent non-drip fully biodegradable mulch film is 0.01 mm-0.015 mm, the tensile strength is not less than 15mPa, the longitudinal elongation at break is not less than 350%, and the transverse elongation at break is not less than 400%.
3. The transparent non-drip full biodegradable mulch film according to claim 1, wherein is provided as an inner layer, a middle layer and an outer layer, wherein the inner layer and the middle layer each comprise the following components by weight percent:
70-85% of PBAT, 4-10% of polylactic acid, 1-3% of stabilizer, 3-7% of heat stabilizer, 0.5-1.5% of antistatic agent, 0.3-0.7% of antioxidant, 0.3-0.7% of mold release agent, 1.5-2% of dripping agent, 1-2% of antifogging agent and 3-7% of filler;
the outer layer comprises the following components in percentage by weight:
72 to 85 percent of PBAT, 4 to 10 percent of polylactic acid, 1 to 3 percent of stabilizer, 3 to 7 percent of heat stabilizer, 0.5 to 1.5 percent of antistatic agent, 0.3 to 0.7 percent of antioxidant, 0.3 to 0.7 percent of release agent and 3 to 7 percent of filler.
4. The transparent non-drip fully biodegradable mulch film according to claim 1, wherein said stabilizer comprises a mixture of one or more of stearic acid, magnesium stearate, aluminum stearate, potassium stearate mixed in any proportion.
5. The transparent non-drip fully biodegradable mulch film according to claim 1, wherein the heat stabilizer is a mixture of one or more of calcium stearate and zinc stearate mixed in any proportion.
6. The transparent non-drip full-biodegradable mulch film according to claim 1, wherein the antistatic agent is a mixture of one or more of sulfate, phosphate and polyethylene glycol mixed uniformly in any proportion.
7. The transparent non-drip fully biodegradable mulch film according to claim 1, wherein the release agent is a mixture of one or more of oleamide, paraffin, glycerol mixed in any proportion.
8. A method for preparing the transparent non-drip fully biodegradable mulch film according to any one of claims 1-7 comprising the steps of,
s1: weighing the raw materials according to the weight percentage, uniformly mixing the raw materials, and extruding the mixture into granules by a double-screw extruder;
s2: and (S1) blowing the granules to obtain the transparent non-dripping full-biodegradable mulching film.
9. The method according to claim 8, wherein the blowing temperature in step S2 is 150 ℃ to 170 ℃.
10. The method of claim 8, wherein the granules are formed into a film by a screw extruder, and the number of screws is set to correspond to the number of layers of the transparent non-drip fully biodegradable mulching film.
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| CN110330773A (en) * | 2019-07-19 | 2019-10-15 | 深圳利琒环保材料有限公司 | A kind of controllable full-biodegradable mulch and preparation method thereof |
| CN110724368A (en) * | 2018-07-16 | 2020-01-24 | 浙江磊峰塑料科技有限公司 | Biodegradable fog-dissipation type non-drop agricultural plastic film and preparation method thereof |
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| CN110724368A (en) * | 2018-07-16 | 2020-01-24 | 浙江磊峰塑料科技有限公司 | Biodegradable fog-dissipation type non-drop agricultural plastic film and preparation method thereof |
| CN110330773A (en) * | 2019-07-19 | 2019-10-15 | 深圳利琒环保材料有限公司 | A kind of controllable full-biodegradable mulch and preparation method thereof |
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Application publication date: 20211210 |
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| RJ01 | Rejection of invention patent application after publication |