CN111592713A - Bio-oxidative degradation mulching film and preparation method thereof - Google Patents
Bio-oxidative degradation mulching film and preparation method thereof Download PDFInfo
- Publication number
- CN111592713A CN111592713A CN202010595104.7A CN202010595104A CN111592713A CN 111592713 A CN111592713 A CN 111592713A CN 202010595104 A CN202010595104 A CN 202010595104A CN 111592713 A CN111592713 A CN 111592713A
- Authority
- CN
- China
- Prior art keywords
- parts
- density polyethylene
- low
- linear low
- mulching film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
-
- 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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
-
- 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
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
-
- 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
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/08—Copolymers of ethene
-
- 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
- C08J2467/02—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
- 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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
-
- 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
-
- 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
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/39—Thiocarbamic acids; Derivatives thereof, e.g. dithiocarbamates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/28—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture specially adapted for farming
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- General Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Biological Depolymerization Polymers (AREA)
- Protection Of Plants (AREA)
Abstract
The invention relates to the technical field of production and application of agricultural degradable mulching films, in particular to a biological oxidation degradable mulching film and a preparation method thereof, wherein the biological oxidation degradable mulching film comprises the following components in parts by weight: 2426H of low-density polyethylene 5-10 parts, 7042 of linear low-density polyethylene 35-45 parts, 7042N of linear low-density polyethylene 35-45 parts and 15-20 parts of oxidative biodegradation master batch. The invention has novel design, and the 2426H low-density polyethylene, the 7042 linear low-density polyethylene and the 7042N linear low-density polyethylene are matched with the oxidative biodegradation master batch for use, so that the performances of the master batch are mutually complemented, the stability and the efficiency of producing the film bubble of the biological oxidative degradation mulching film can be improved, the indexes of strength and elongation at break are improved, the light transmittance is improved, and the product quality is ensured.
Description
Technical Field
The invention relates to the technical field of production and application of agricultural degradable mulching films, in particular to a biological oxidative degradable mulching film and a preparation method thereof.
Background
The biological oxidation degradation mulching film is a biological oxidation composite degradation mulching film which is prepared by organically compounding polylactic acid (PLA), poly (terephthalic acid) -butylene adipate (PBAT) and the like with Polyethylene (PE) by utilizing different mechanisms in a mode of decomposing by soil microorganisms and a ground light radiation decomposition mode mainly comprising a photosensitive assistant, a light induction assistant, a light promotion assistant and the like. The method is characterized in that: it is made up by using biological and oxidation material and polyethylene through a scientific compounding process, and after the crops are harvested, the crops can be degraded into carbon dioxide, water and humus which are harmless to soil and crops.
The existing degradable film has poor stability, the produced degradable film has low strength and elongation at break, and the light transmission effect is poor.
Disclosure of Invention
The invention aims to provide a biological oxidative degradation mulching film and a preparation method thereof, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the biological oxidation degradation mulching film comprises the following components in parts by weight: 2426H of low-density polyethylene 5-10 parts, 7042 of linear low-density polyethylene 35-45 parts, 7042N of linear low-density polyethylene 35-45 parts and 15-20 parts of oxidative biodegradation master batch.
As a further scheme of the invention: the biological oxidative degradation mulching film comprises the following components in parts by weight: 2426-8 parts of low-density polyethylene (LDPE) such as polyethylene 2426H, 37-42 parts of linear low-density polyethylene 7042N and 16-19 parts of oxidative biodegradation master batch.
As a still further scheme of the invention: the biological oxidative degradation mulching film comprises the following components in parts by weight: 2426H of low-density polyethylene 7 parts, 7042 of linear low-density polyethylene 40 parts, 7042N of linear low-density polyethylene 40 parts and 18 parts of oxidative biodegradation master batch.
As a still further scheme of the invention: the oxidative biodegradable master batch comprises the following components in parts by weight: 20-30 parts of polylactic acid, 40-50 parts of polybutylene terephthalate-adipate, 2-3 parts of a photosensitive assistant, 2-3 parts of a light induction assistant, 2-3 parts of a light promotion assistant, 2-3 parts of a dispersing agent, 1-1.5 parts of a thermal antioxidant, 3-5 parts of a titanate coupling agent, 10-20 parts of 1F7B low-density polyethylene and 15-20 parts of 7042 linear low-density polyethylene.
As a still further scheme of the invention: the oxidative biodegradable master batch comprises the following components in parts by weight: 22-27 parts of polylactic acid, 40-50 parts of polybutylene terephthalate-adipate, 2.4-2.7 parts of a photosensitive assistant, 2.4-2.7 parts of a light induction assistant, 2.4-2.7 parts of a light promotion assistant, 2.4-2.7 parts of a dispersing agent, 1.1-1.3 parts of a thermal antioxidant, 3.5-4.5 parts of a titanate coupling agent, 13-18 parts of 1F7B low-density polyethylene and 16-19 parts of 7042 linear low-density polyethylene.
As a still further scheme of the invention: the oxidative biodegradable master batch comprises the following components in parts by weight: 25 parts of polylactic acid, 46 parts of polybutylene terephthalate-adipate, 2.5 parts of photosensitive auxiliary agent, 2.5 parts of light induction auxiliary agent, 2.5 parts of light promotion auxiliary agent, 2.5 parts of dispersing agent, 1.2 parts of thermal antioxidant, 4 parts of titanate coupling agent, 15 parts of 1F7B low-density polyethylene and 18 parts of 7042 linear low-density polyethylene.
A preparation method of a biological oxidative degradation mulching film comprises the following steps: weighing 2426H low-density polyethylene, 7042 linear low-density polyethylene, 7042N linear low-density polyethylene and an oxidative biodegradation master batch according to the proportion of ingredients, uniformly mixing, putting into a hopper of a plastic extruder, starting the plastic extruder, carrying out inflation and stretching through a single-screw metering section, a plasticizing section and an extrusion section, then carrying out cooling setting, slitting and rolling, coil discharging, weighing, checking, and finally packaging and warehousing.
As a still further scheme of the invention: the extruder is molded by adopting an SJ65 plastic extrusion film blowing machine, and the working temperature of the SJ65 plastic extruder is 150-180 ℃.
As a still further scheme of the invention: the preparation method of the oxidative biodegradation master batch comprises the following steps: weighing polylactic acid, poly (terephthalic acid) -butanediol adipate, a photosensitive additive, a photoinduced additive, a light-promoting additive, a dispersing agent, a thermal antioxidant, a titanate coupling agent, 1F7B low-density polyethylene and 7042 linear low-density polyethylene, adding the materials into a 500L high-low speed mixing internal mixer, kneading the materials into a dough shape, and then putting the dough shape into a single-screw double-wrist forced feeding granulator to manufacture the biological oxidation degradation master batch.
Compared with the prior art, the invention has the beneficial effects that: the invention has novel design, and the 2426H low-density polyethylene, the 7042 linear low-density polyethylene and the 7042N linear low-density polyethylene are matched with the oxidative biodegradation master batch for use, so that the performances of the master batch are mutually complemented, the stability and the efficiency of producing the film bubble of the biological oxidative degradation mulching film can be improved, the indexes of strength and elongation at break are improved, the light transmittance is improved, and the product quality is ensured.
Drawings
FIG. 1 is a flow chart of preparation of a bio-oxidative degradation mulch film.
FIG. 2 is a flow chart of the preparation of the bio-oxidative degradation master batch in the bio-oxidative degradation mulch film.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, an element of the present invention may be said to be "fixed" or "disposed" to another element, either directly on the other element or with intervening elements present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Example one
In the embodiment of the invention, the biological oxidation degradation mulching film comprises the following components in parts by weight: 2426H of low-density polyethylene 5 parts, 7042 of linear low-density polyethylene 35 parts, 7042N of linear low-density polyethylene 45 parts and 15 parts of oxidative biodegradation master batch.
In the embodiment of the present invention, it should be noted that:
2426H type low-density polyethylene contains slipping agent, the melt flow rate is 2.0g/10min, the fluidity is good, the light transmittance of the product is high, the elongation at break is high, the flexibility is good, but the tensile strength is low;
the 7042 type linear low-density polyethylene contains slipping agent, the melt flow rate is 2g/10min, the light transmittance of the product is higher, the elongation at break is higher, the flexibility is better, and the tensile strength is high;
7042 the low density polyethylene of model N does not contain slipping agent, the melt flow rate is 4.0g/10min, the elongation at break is high, the flexibility is good, but the tensile strength is lower, the stability of the produced oxidative biodegradation mulch film is good, and the winding is tidy.
In the embodiment of the invention, the 2426H low-density polyethylene, the 7042 linear low-density polyethylene and the 7042N linear low-density polyethylene are matched with the oxidative biodegradation master batch for use, so that the performances of the master batch are complemented with each other, the bubble production stability and efficiency of the biological oxidative degradation mulching film can be improved, the indexes of strength and elongation at break are improved, the light transmittance is improved, and the product quality is ensured.
In the embodiment of the invention, the oxidative biodegradation master batch comprises the following components in parts by weight: 20 parts of polylactic acid, 50 parts of poly (terephthalic acid) -butanediol adipate, 2 parts of photosensitive auxiliary agent, 2 parts of light induction auxiliary agent, 2 parts of light promotion auxiliary agent, 2 parts of dispersing agent, 1 part of thermal antioxidant, 3 parts of titanate coupling agent, 10 parts of 1F7B low-density polyethylene and 20 parts of 7042 linear low-density polyethylene.
In the embodiment of the present invention, it is preferable that the photosensitizing assistant is benzoporphyrin derivative monoacid, the photoinducing assistant is quinolinone derivative, the light-promoting assistant is iron dimethyldithiocarbamate, and the dispersing agent is polyethylene wax, but the present invention is not limited thereto when selecting.
In the embodiment of the invention, the prepared product has the preferable width of 4000-10000mm and the thickness of 0.06-0.15 mm. The main application field is as follows: the product is mainly used for the covering cultivation of overwintering solar greenhouses, spring arched sheds and the like of overwintering tomatoes, eggplants, hot peppers, cucumbers, watermelons, grapes and Chinese chives and various flowers, vegetables and fruits in northern areas. The product should not have the defects of air bubbles, impurities, stripes, perforations, folds and the like which influence the use, the film package is neat, the protection is effective, and the adhesion and the scratch are prevented; the product prepared by the invention is preferably used for the product with the width of 300-2000mm and the thickness of 0.006-0.01 mm. The degradation period is designed to be 50-300 days according to the use requirements of different crops, the use mode and the method are the same as the common mulching film or full film mulching cultivation, and the physical and mechanical performance indexes, the heat preservation, the soil moisture conservation and other functions of the fertilizer can meet the full film mulching requirements in the use process of the crop cultivation, growth and development.
In the embodiment of the invention, aiming at 'white pollution', the problems that the common mulching film is not degraded after aging for 300 years and causes 'white pollution' to soil and environment are solved according to the fertility traits of crops; the comprehensive functions of the biological oxidation composite degradable mulching film are controllable, so that the biological oxidation composite degradable mulching film is degraded into a composite functional degradable mulching film of carbon dioxide, water and humus which are harmless to crops and soil in 50-300 days. After the crops are harvested, the crops can be degraded to have no trace and no formed object exists, so that the aim of protecting the ecological environment is fulfilled; the mulching film is mainly applied to the mulching cultivation of various crops such as corn, potato, cotton, vegetable crops and the like, and has the same effects on improving the quality of the crops, preserving heat, preserving soil moisture, improving the soil property, maintaining and preventing the loss of soil nutrients, inhibiting the growth of weeds, reducing plant diseases and insect pests, improving the functional utilization rate of the crops and the like while reducing the accumulation of residues on the surface layer of the soil; can also be popularized in the field of disposable garbage bags and packaging plastics.
Example two
In the embodiment of the invention, the biological oxidation degradation mulching film comprises the following components in parts by weight: 2426 parts of low-density polyethylene (LDPE), 7042 parts of linear low-density polyethylene (LLDPE), and 16 parts of oxidative biodegradation master batch.
In the embodiment of the present invention, it should be noted that:
2426H type low-density polyethylene contains slipping agent, the melt flow rate is 2.0g/10min, the fluidity is good, the light transmittance of the product is high, the elongation at break is high, the flexibility is good, but the tensile strength is low;
the 7042 type linear low-density polyethylene contains slipping agent, the melt flow rate is 2g/10min, the light transmittance of the product is higher, the elongation at break is higher, the flexibility is better, and the tensile strength is high;
7042 the low density polyethylene of model N does not contain slipping agent, the melt flow rate is 4.0g/10min, the elongation at break is high, the flexibility is good, but the tensile strength is lower, the stability of the produced oxidative biodegradation mulch film is good, and the winding is tidy.
In the embodiment of the invention, the 2426H low-density polyethylene, the 7042 linear low-density polyethylene and the 7042N linear low-density polyethylene are matched with the oxidative biodegradation master batch for use, so that the performances of the master batch are complemented with each other, the bubble production stability and efficiency of the biological oxidative degradation mulching film can be improved, the indexes of strength and elongation at break are improved, the light transmittance is improved, and the product quality is ensured.
In the embodiment of the invention, the oxidative biodegradation master batch comprises the following components in parts by weight: 22 parts of polylactic acid, 48 parts of polybutylene terephthalate-adipate, 2.4 parts of a photosensitive assistant, 2.4 parts of a light induction assistant, 2.4 parts of a light promotion assistant, 2.4 parts of a dispersing agent, 1.1 parts of a thermal antioxidant, 3.5 parts of a titanate coupling agent, 13 parts of 1F7B low-density polyethylene and 19 parts of 7042 linear low-density polyethylene.
In the embodiment of the present invention, it is preferable that the photosensitizing assistant is benzoporphyrin derivative monoacid, the photoinducing assistant is quinolinone derivative, the light-promoting assistant is iron dimethyldithiocarbamate, and the dispersing agent is polyethylene wax, but the present invention is not limited thereto when selecting.
In the embodiment of the invention, the prepared product has the preferable width of 4000-10000mm and the thickness of 0.06-0.15 mm. The main application field is as follows: the product is mainly used for the covering cultivation of overwintering solar greenhouses, spring arched sheds and the like of overwintering tomatoes, eggplants, hot peppers, cucumbers, watermelons, grapes and Chinese chives and various flowers, vegetables and fruits in northern areas. The product should not have the defects of air bubbles, impurities, stripes, perforations, folds and the like which influence the use, the film package is neat, the protection is effective, and the adhesion and the scratch are prevented; the product prepared by the invention is preferably used for the product with the width of 300-2000mm and the thickness of 0.006-0.01 mm. The degradation period is designed to be 50-300 days according to the use requirements of different crops, the use mode and the method are the same as the common mulching film or full film mulching cultivation, and the physical and mechanical performance indexes, the heat preservation, the soil moisture conservation and other functions of the fertilizer can meet the full film mulching requirements in the use process of the crop cultivation, growth and development.
In the embodiment of the invention, aiming at 'white pollution', the problems that the common mulching film is not degraded after aging for 300 years and causes 'white pollution' to soil and environment are solved according to the fertility traits of crops; the comprehensive functions of the biological oxidation composite degradable mulching film are controllable, so that the biological oxidation composite degradable mulching film is degraded into a composite functional degradable mulching film of carbon dioxide, water and humus which are harmless to crops and soil in 50-300 days. After the crops are harvested, the crops can be degraded to have no trace and no formed object exists, so that the aim of protecting the ecological environment is fulfilled; the mulching film is mainly applied to the mulching cultivation of various crops such as corn, potato, cotton, vegetable crops and the like, and has the same effects on improving the quality of the crops, preserving heat, preserving soil moisture, improving the soil property, maintaining and preventing the loss of soil nutrients, inhibiting the growth of weeds, reducing plant diseases and insect pests, improving the functional utilization rate of the crops and the like while reducing the accumulation of residues on the surface layer of the soil; can also be popularized in the field of disposable garbage bags and packaging plastics.
EXAMPLE III
In the embodiment of the invention, the biological oxidation degradation mulching film comprises the following components in parts by weight: 2426H of low-density polyethylene 7 parts, 7042 of linear low-density polyethylene 40 parts, 7042N of linear low-density polyethylene 40 parts and 18 parts of oxidative biodegradation master batch.
In the embodiment of the present invention, it should be noted that:
2426H type low-density polyethylene contains slipping agent, the melt flow rate is 2.0g/10min, the fluidity is good, the light transmittance of the product is high, the elongation at break is high, the flexibility is good, but the tensile strength is low;
the 7042 type linear low-density polyethylene contains slipping agent, the melt flow rate is 2g/10min, the light transmittance of the product is higher, the elongation at break is higher, the flexibility is better, and the tensile strength is high;
7042 the low density polyethylene of model N does not contain slipping agent, the melt flow rate is 4.0g/10min, the elongation at break is high, the flexibility is good, but the tensile strength is lower, the stability of the produced oxidative biodegradation mulch film is good, and the winding is tidy.
In the embodiment of the invention, the 2426H low-density polyethylene, the 7042 linear low-density polyethylene and the 7042N linear low-density polyethylene are matched with the oxidative biodegradation master batch for use, so that the performances of the master batch are complemented with each other, the bubble production stability and efficiency of the biological oxidative degradation mulching film can be improved, the indexes of strength and elongation at break are improved, the light transmittance is improved, and the product quality is ensured.
In the embodiment of the invention, the oxidative biodegradation master batch comprises the following components in parts by weight: 25 parts of polylactic acid, 46 parts of polybutylene terephthalate-adipate, 2.5 parts of photosensitive auxiliary agent, 2.5 parts of light induction auxiliary agent, 2.5 parts of light promotion auxiliary agent, 2.5 parts of dispersing agent, 1.2 parts of thermal antioxidant, 4 parts of titanate coupling agent, 15 parts of 1F7B low-density polyethylene and 18 parts of 7042 linear low-density polyethylene.
In the embodiment of the present invention, it is preferable that the photosensitizing assistant is benzoporphyrin derivative monoacid, the photoinducing assistant is quinolinone derivative, the light-promoting assistant is iron dimethyldithiocarbamate, and the dispersing agent is polyethylene wax, but the present invention is not limited thereto when selecting.
In the embodiment of the invention, the prepared product has the preferable width of 4000-10000mm and the thickness of 0.06-0.15 mm. The main application field is as follows: the product is mainly used for the covering cultivation of overwintering solar greenhouses, spring arched sheds and the like of overwintering tomatoes, eggplants, hot peppers, cucumbers, watermelons, grapes and Chinese chives and various flowers, vegetables and fruits in northern areas. The product should not have the defects of air bubbles, impurities, stripes, perforations, folds and the like which influence the use, the film package is neat, the protection is effective, and the adhesion and the scratch are prevented; the product prepared by the invention is preferably used for the product with the width of 300-2000mm and the thickness of 0.006-0.01 mm. The degradation period is designed to be 50-300 days according to the use requirements of different crops, the use mode and the method are the same as the common mulching film or full film mulching cultivation, and the physical and mechanical performance indexes, the heat preservation, the soil moisture conservation and other functions of the fertilizer can meet the full film mulching requirements in the use process of the crop cultivation, growth and development.
In the embodiment of the invention, aiming at 'white pollution', the problems that the common mulching film is not degraded after aging for 300 years and causes 'white pollution' to soil and environment are solved according to the fertility traits of crops; the comprehensive functions of the biological oxidation composite degradable mulching film are controllable, so that the biological oxidation composite degradable mulching film is degraded into a composite functional degradable mulching film of carbon dioxide, water and humus which are harmless to crops and soil in 50-300 days. After the crops are harvested, the crops can be degraded to have no trace and no formed object exists, so that the aim of protecting the ecological environment is fulfilled; the mulching film is mainly applied to the mulching cultivation of various crops such as corn, potato, cotton, vegetable crops and the like, and has the same effects on improving the quality of the crops, preserving heat, preserving soil moisture, improving the soil property, maintaining and preventing the loss of soil nutrients, inhibiting the growth of weeds, reducing plant diseases and insect pests, improving the functional utilization rate of the crops and the like while reducing the accumulation of residues on the surface layer of the soil; can also be popularized in the field of disposable garbage bags and packaging plastics.
Example four
In the embodiment of the invention, the biological oxidation degradation mulching film comprises the following components in parts by weight: 2426H of low-density polyethylene 8 parts, 7042 of linear low-density polyethylene 42 parts, 7042N of linear low-density polyethylene 37 parts and 19 parts of oxidative biodegradation master batch.
In the embodiment of the present invention, it should be noted that:
2426H type low-density polyethylene contains slipping agent, the melt flow rate is 2.0g/10min, the fluidity is good, the light transmittance of the product is high, the elongation at break is high, the flexibility is good, but the tensile strength is low;
the 7042 type linear low-density polyethylene contains slipping agent, the melt flow rate is 2g/10min, the light transmittance of the product is higher, the elongation at break is higher, the flexibility is better, and the tensile strength is high;
7042 the low density polyethylene of model N does not contain slipping agent, the melt flow rate is 4.0g/10min, the elongation at break is high, the flexibility is good, but the tensile strength is lower, the stability of the produced oxidative biodegradation mulch film is good, and the winding is tidy.
In the embodiment of the invention, the 2426H low-density polyethylene, the 7042 linear low-density polyethylene and the 7042N linear low-density polyethylene are matched with the oxidative biodegradation master batch for use, so that the performances of the master batch are complemented with each other, the bubble production stability and efficiency of the biological oxidative degradation mulching film can be improved, the indexes of strength and elongation at break are improved, the light transmittance is improved, and the product quality is ensured.
In the embodiment of the invention, the oxidative biodegradation master batch comprises the following components in parts by weight: 27 parts of polylactic acid, 43 parts of polybutylene terephthalate-adipate, 2.7 parts of a photosensitive assistant, 2.7 parts of a light induction assistant, 2.7 parts of a light promotion assistant, 2.7 parts of a dispersing agent, 1.3 parts of a thermal antioxidant, 4.5 parts of a titanate coupling agent, 18 parts of 1F7B low-density polyethylene and 16 parts of 7042 linear low-density polyethylene.
In the embodiment of the present invention, it is preferable that the photosensitizing assistant is benzoporphyrin derivative monoacid, the photoinducing assistant is quinolinone derivative, the light-promoting assistant is iron dimethyldithiocarbamate, and the dispersing agent is polyethylene wax, but the present invention is not limited thereto when selecting.
In the embodiment of the invention, the prepared product has the preferable width of 4000-10000mm and the thickness of 0.06-0.15 mm. The main application field is as follows: the product is mainly used for the covering cultivation of overwintering solar greenhouses, spring arched sheds and the like of overwintering tomatoes, eggplants, hot peppers, cucumbers, watermelons, grapes and Chinese chives and various flowers, vegetables and fruits in northern areas. The product should not have the defects of air bubbles, impurities, stripes, perforations, folds and the like which influence the use, the film package is neat, the protection is effective, and the adhesion and the scratch are prevented; the product prepared by the invention is preferably used for the product with the width of 300-2000mm and the thickness of 0.006-0.01 mm. The degradation period is designed to be 50-300 days according to the use requirements of different crops, the use mode and the method are the same as the common mulching film or full film mulching cultivation, and the physical and mechanical performance indexes, the heat preservation, the soil moisture conservation and other functions of the fertilizer can meet the full film mulching requirements in the use process of the crop cultivation, growth and development.
In the embodiment of the invention, aiming at 'white pollution', the problems that the common mulching film is not degraded after aging for 300 years and causes 'white pollution' to soil and environment are solved according to the fertility traits of crops; the comprehensive functions of the biological oxidation composite degradable mulching film are controllable, so that the biological oxidation composite degradable mulching film is degraded into a composite functional degradable mulching film of carbon dioxide, water and humus which are harmless to crops and soil in 50-300 days. After the crops are harvested, the crops can be degraded to have no trace and no formed object exists, so that the aim of protecting the ecological environment is fulfilled; the mulching film is mainly applied to the mulching cultivation of various crops such as corn, potato, cotton, vegetable crops and the like, and has the same effects on improving the quality of the crops, preserving heat, preserving soil moisture, improving the soil property, maintaining and preventing the loss of soil nutrients, inhibiting the growth of weeds, reducing plant diseases and insect pests, improving the functional utilization rate of the crops and the like while reducing the accumulation of residues on the surface layer of the soil; can also be popularized in the field of disposable garbage bags and packaging plastics.
EXAMPLE five
In the embodiment of the invention, the biological oxidation degradation mulching film comprises the following components in parts by weight: 2426H of 10 parts of low-density polyethylene, 7042 of 45 parts of linear low-density polyethylene, 7042N of 35 parts of linear low-density polyethylene and 20 parts of oxidative biodegradation master batch.
In the embodiment of the present invention, it should be noted that:
2426H type low-density polyethylene contains slipping agent, the melt flow rate is 2.0g/10min, the fluidity is good, the light transmittance of the product is high, the elongation at break is high, the flexibility is good, but the tensile strength is low;
the 7042 type linear low-density polyethylene contains slipping agent, the melt flow rate is 2g/10min, the light transmittance of the product is higher, the elongation at break is higher, the flexibility is better, and the tensile strength is high;
7042 the low density polyethylene of model N does not contain slipping agent, the melt flow rate is 4.0g/10min, the elongation at break is high, the flexibility is good, but the tensile strength is lower, the stability of the produced oxidative biodegradation mulch film is good, and the winding is tidy.
In the embodiment of the invention, the 2426H low-density polyethylene, the 7042 linear low-density polyethylene and the 7042N linear low-density polyethylene are matched with the oxidative biodegradation master batch for use, so that the performances of the master batch are complemented with each other, the bubble production stability and efficiency of the biological oxidative degradation mulching film can be improved, the indexes of strength and elongation at break are improved, the light transmittance is improved, and the product quality is ensured.
In the embodiment of the invention, the oxidative biodegradation master batch comprises the following components in parts by weight: 30 parts of polylactic acid, 40 parts of polybutylene terephthalate-adipate, 3 parts of photosensitive auxiliary agent, 3 parts of light induction auxiliary agent, 3 parts of light promotion auxiliary agent, 3 parts of dispersing agent, 1.5 parts of thermal antioxidant, 5 parts of titanate coupling agent, 20 parts of 1F7B low-density polyethylene and 15 parts of 7042 linear low-density polyethylene.
In the embodiment of the present invention, it is preferable that the photosensitizing assistant is benzoporphyrin derivative monoacid, the photoinducing assistant is quinolinone derivative, the light-promoting assistant is iron dimethyldithiocarbamate, and the dispersing agent is polyethylene wax, but the present invention is not limited thereto when selecting.
In the embodiment of the invention, the prepared product has the preferable width of 4000-10000mm and the thickness of 0.06-0.15 mm. The main application field is as follows: the product is mainly used for the covering cultivation of overwintering solar greenhouses, spring arched sheds and the like of overwintering tomatoes, eggplants, hot peppers, cucumbers, watermelons, grapes and Chinese chives and various flowers, vegetables and fruits in northern areas. The product should not have the defects of air bubbles, impurities, stripes, perforations, folds and the like which influence the use, the film package is neat, the protection is effective, and the adhesion and the scratch are prevented; the product prepared by the invention is preferably used for the product with the width of 300-2000mm and the thickness of 0.006-0.01 mm. The degradation period is designed to be 50-300 days according to the use requirements of different crops, the use mode and the method are the same as the common mulching film or full film mulching cultivation, and the physical and mechanical performance indexes, the heat preservation, the soil moisture conservation and other functions of the fertilizer can meet the full film mulching requirements in the use process of the crop cultivation, growth and development.
In the embodiment of the invention, aiming at 'white pollution', the problems that the common mulching film is not degraded after aging for 300 years and causes 'white pollution' to soil and environment are solved according to the fertility traits of crops; the comprehensive functions of the biological oxidation composite degradable mulching film are controllable, so that the biological oxidation composite degradable mulching film is degraded into a composite functional degradable mulching film of carbon dioxide, water and humus which are harmless to crops and soil in 50-300 days. After the crops are harvested, the crops can be degraded to have no trace and no formed object exists, so that the aim of protecting the ecological environment is fulfilled; the mulching film is mainly applied to the mulching cultivation of various crops such as corn, potato, cotton, vegetable crops and the like, and has the same effects on improving the quality of the crops, preserving heat, preserving soil moisture, improving the soil property, maintaining and preventing the loss of soil nutrients, inhibiting the growth of weeds, reducing plant diseases and insect pests, improving the functional utilization rate of the crops and the like while reducing the accumulation of residues on the surface layer of the soil; can also be popularized in the field of disposable garbage bags and packaging plastics.
Referring to fig. 1, an embodiment of the present invention further provides a preparation method of a bio-oxidative degradation mulch film, including the following steps: weighing 2426H low-density polyethylene, 7042 linear low-density polyethylene, 7042N linear low-density polyethylene and an oxidative biodegradation master batch according to the proportion of ingredients, uniformly mixing, putting into a hopper of a plastic extruder, starting the plastic extruder, carrying out inflation and stretching through a single-screw metering section, a plasticizing section and an extrusion section, then carrying out cooling setting, slitting and rolling, coil discharging, weighing, checking, and finally packaging and warehousing.
In the embodiment of the invention, the extruder adopts SJ65 plastic extrusion and film blowing machine, and the working temperature of the SJ65 plastic extruder is 150-180 ℃.
In the embodiment of the present invention, referring to fig. 2, the preparation method of the oxidative biodegradable masterbatch comprises the following steps: weighing polylactic acid, poly (terephthalic acid) -butanediol adipate, a photosensitive additive, a photoinduced additive, a light-promoting additive, a dispersing agent, a thermal antioxidant, a titanate coupling agent, 1F7B low-density polyethylene and 7042 linear low-density polyethylene, adding the materials into a 500L high-low speed mixing internal mixer, kneading the materials into a dough shape, and then putting the dough shape into a single-screw double-wrist forced feeding granulator to manufacture the biological oxidation degradation master batch.
In the embodiment of the invention, the high-speed and low-speed mixing internal mixer can discharge materials after the temperature reaches 160 ℃ and the constant temperature is 3 minutes, and the temperature of the single-screw extruder is 180-200 ℃.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The biological oxidation degradation mulching film is characterized by comprising the following components in parts by weight: 2426H of low-density polyethylene 5-10 parts, 7042 of linear low-density polyethylene 35-45 parts, 7042N of linear low-density polyethylene 35-45 parts and 15-20 parts of oxidative biodegradation master batch.
2. The biological oxidation degradation mulching film according to claim 1, wherein the biological oxidation degradation mulching film comprises the following components in parts by weight: 2426-8 parts of low-density polyethylene (LDPE) such as polyethylene 2426H, 37-42 parts of linear low-density polyethylene 7042N and 16-19 parts of oxidative biodegradation master batch.
3. The biological oxidation degradation mulching film according to claim 2, wherein the biological oxidation degradation mulching film comprises the following components in parts by weight: 2426H of low-density polyethylene 7 parts, 7042 of linear low-density polyethylene 40 parts, 7042N of linear low-density polyethylene 40 parts and 18 parts of oxidative biodegradation master batch.
4. The biological oxidation degradation mulching film according to any one of claims 1 to 3, wherein the oxidation and biological degradation master batch comprises the following components in parts by weight: 20-30 parts of polylactic acid, 40-50 parts of polybutylene terephthalate-adipate, 2-3 parts of a photosensitive assistant, 2-3 parts of a light induction assistant, 2-3 parts of a light promotion assistant, 2-3 parts of a dispersing agent, 1-1.5 parts of a thermal antioxidant, 3-5 parts of a titanate coupling agent, 10-20 parts of 1F7B low-density polyethylene and 15-20 parts of 7042 linear low-density polyethylene.
5. The biological oxidation degradation mulching film according to claim 4, wherein the oxidation and biological degradation master batch comprises the following components in parts by weight: 22-27 parts of polylactic acid, 40-50 parts of polybutylene terephthalate-adipate, 2.4-2.7 parts of a photosensitive assistant, 2.4-2.7 parts of a light induction assistant, 2.4-2.7 parts of a light promotion assistant, 2.4-2.7 parts of a dispersing agent, 1.1-1.3 parts of a thermal antioxidant, 3.5-4.5 parts of a titanate coupling agent, 13-18 parts of 1F7B low-density polyethylene and 16-19 parts of 7042 linear low-density polyethylene.
6. The biological oxidation degradation mulching film according to claim 5, wherein the oxidation and biological degradation master batch comprises the following components in parts by weight: 25 parts of polylactic acid, 46 parts of polybutylene terephthalate-adipate, 2.5 parts of photosensitive auxiliary agent, 2.5 parts of light induction auxiliary agent, 2.5 parts of light promotion auxiliary agent, 2.5 parts of dispersing agent, 1.2 parts of thermal antioxidant, 4 parts of titanate coupling agent, 15 parts of 1F7B low-density polyethylene and 18 parts of 7042 linear low-density polyethylene.
7. A method for preparing the biological oxidation degradation mulch film according to any one of the claims 1 to 6, comprising the steps of: weighing 2426H low-density polyethylene, 7042 linear low-density polyethylene, 7042N linear low-density polyethylene and an oxidative biodegradation master batch according to the proportion of ingredients, uniformly mixing, putting into a hopper of a plastic extruder, starting the plastic extruder, carrying out inflation and stretching through a single-screw metering section, a plasticizing section and an extrusion section, then carrying out cooling setting, slitting and rolling, coil discharging, weighing, checking, and finally packaging and warehousing.
8. The method for preparing the bio-oxidative degradation mulch film as claimed in claim 7, wherein the extruder is molded by an SJ65 plastic extrusion and blowing machine, and the working temperature of the SJ65 plastic extruder is 150-180 ℃.
9. The method for preparing the biological oxidation degradation mulching film according to claim 7, wherein the method for preparing the oxidation biodegradation master batch comprises the following steps: weighing polylactic acid, poly (terephthalic acid) -butanediol adipate, a photosensitive additive, a photoinduced additive, a light-promoting additive, a dispersing agent, a thermal antioxidant, a titanate coupling agent, 1F7B low-density polyethylene and 7042 linear low-density polyethylene, adding the materials into a 500L high-low speed mixing internal mixer, kneading the materials into a dough shape, and then putting the dough shape into a single-screw double-wrist forced feeding granulator to manufacture the biological oxidation degradation master batch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010595104.7A CN111592713A (en) | 2020-06-28 | 2020-06-28 | Bio-oxidative degradation mulching film and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010595104.7A CN111592713A (en) | 2020-06-28 | 2020-06-28 | Bio-oxidative degradation mulching film and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111592713A true CN111592713A (en) | 2020-08-28 |
Family
ID=72191787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010595104.7A Pending CN111592713A (en) | 2020-06-28 | 2020-06-28 | Bio-oxidative degradation mulching film and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111592713A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114619740A (en) * | 2022-03-21 | 2022-06-14 | 山东新天鹤塑胶有限公司 | High-heat-preservation soil moisture-preservation double-layer composite controllable degradable mulching film |
| CN115124779A (en) * | 2022-02-17 | 2022-09-30 | 山东新天鹤塑胶有限公司 | Polyethylene modified novel controllable composite degradable mulching film for peanut planting |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103408827A (en) * | 2013-08-29 | 2013-11-27 | 河北奥柯柏环保科技有限公司 | Degradable environmental-friendly mulching film and preparation method thereof |
-
2020
- 2020-06-28 CN CN202010595104.7A patent/CN111592713A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103408827A (en) * | 2013-08-29 | 2013-11-27 | 河北奥柯柏环保科技有限公司 | Degradable environmental-friendly mulching film and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115124779A (en) * | 2022-02-17 | 2022-09-30 | 山东新天鹤塑胶有限公司 | Polyethylene modified novel controllable composite degradable mulching film for peanut planting |
| CN115124779B (en) * | 2022-02-17 | 2024-02-02 | 山东新天鹤塑胶有限公司 | Polyethylene modified novel controllable composite degradation mulch film for peanut planting |
| CN114619740A (en) * | 2022-03-21 | 2022-06-14 | 山东新天鹤塑胶有限公司 | High-heat-preservation soil moisture-preservation double-layer composite controllable degradable mulching film |
| CN114619740B (en) * | 2022-03-21 | 2024-02-02 | 山东新天鹤塑胶有限公司 | Double-layer composite controllable degradable mulch film with high heat preservation and soil moisture conservation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106003943B (en) | The preparation method of three-layer co-extruded Biodegradable mulch and three-layer co-extruded Biodegradable mulch | |
| CN110283433B (en) | Full-biodegradable mulching film and preparation method and application thereof | |
| CN203666067U (en) | Strip-segmenting agricultural plastic mulching film with different degradation functions | |
| CN111592713A (en) | Bio-oxidative degradation mulching film and preparation method thereof | |
| CN102942770A (en) | Completely-biodegradable agricultural mulching film | |
| CN111742748B (en) | Biodegradable nutrition pot for boron-nitrogen-phosphorus slow-release compound fertilizer and preparation method and application thereof | |
| KR102326756B1 (en) | Biodegradable mulching film using livestock dung and it's manufacturing method | |
| CN105542401B (en) | A kind of PET anti-grass clothes and production method | |
| CN106117622A (en) | A kind of degradable mulch and preparation method | |
| CN104045905A (en) | Ecological environment-friendly light-conversion mulching film | |
| CN112980167A (en) | Degradable agricultural mulching film and preparation method thereof | |
| CN101699973B (en) | Method for producing crystal whisker reinforced polyethylene ground film for tobacco in plateau areas | |
| CN103059527B (en) | Polylactic acid-plant fiber composite degradable material | |
| CN110982231B (en) | Agricultural white full-biological controllable degradable plastic lifting rope and preparation method thereof | |
| CN105272587A (en) | Multifunctional degradable plastic mulching film | |
| CN110862602A (en) | Biodegradable far infrared terahertz agricultural mulching film | |
| KR102308401B1 (en) | Biodegradable release controlling fertilizer, biodegradable mulching film comprising the same and method for manufacturing the same | |
| CN105419261A (en) | Biodegradable material, preparation method and applications thereof | |
| CN103881149A (en) | Environment-friendly plastic mulching film | |
| CN115124779B (en) | Polyethylene modified novel controllable composite degradation mulch film for peanut planting | |
| RU2646623C2 (en) | Biodegradable mulch for agricultural applications | |
| AU2021102212A4 (en) | Full-biodegradable Water-saving Mulching Film for Arid Soil and Preparation Method Thereof | |
| CN215530404U (en) | Novel degradable composite mulching film | |
| CN108948701A (en) | A kind of environmental protection high-ductility agricultural film and preparation method thereof | |
| CN114292424A (en) | Nano-modified high-barrier biodegradable mulching film |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200828 |
|
| WD01 | Invention patent application deemed withdrawn after publication |