CN106003943A - Three-layer co-extrusion biodegradable mulch film and preparation method thereof - Google Patents

Three-layer co-extrusion biodegradable mulch film and preparation method thereof Download PDF

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Publication number
CN106003943A
CN106003943A CN201610333760.3A CN201610333760A CN106003943A CN 106003943 A CN106003943 A CN 106003943A CN 201610333760 A CN201610333760 A CN 201610333760A CN 106003943 A CN106003943 A CN 106003943A
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layer
layered material
biodegradable mulch
modifying agent
agent
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CN106003943B (en
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李积迁
陈永弟
杨宏
陈晓江
李建平
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SHENZHEN HONGCAI NEW MATERIAL TECHNOLOGY Co Ltd
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SHENZHEN HONGCAI NEW MATERIAL TECHNOLOGY Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/716—Degradable
    • B32B2307/7163—Biodegradable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7244—Oxygen barrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7246—Water vapor barrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2410/00—Agriculture-related articles
    • 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
    • C08J2369/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
    • 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
    • C08J2403/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
    • C08J2403/02—Starch; Degradation products thereof, e.g. dextrin
    • 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
    • C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2433/24—Homopolymers or copolymers of amides or imides
    • C08J2433/26—Homopolymers or copolymers of acrylamide or methacrylamide
    • 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
    • C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; 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
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/06—Biodegradable
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/14—Gas barrier composition
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/16—Applications used for films
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Organic Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Environmental Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Toxicology (AREA)
  • General Health & Medical Sciences (AREA)
  • Laminated Bodies (AREA)
  • Biological Depolymerization Polymers (AREA)

Abstract

The invention provides a three-layer co-extrusion biodegradable mulch film and a preparation method thereof. According to the preparation method of the three-layer co-extrusion biodegradable mulch film, an inner-layer material, a middle-layer material and an outer-layer material are processed into thin membranes by a three-layer co-extrusion membrane blowing technology, and through a material compounding modification technology and a three-layer co-extrusion technology, the biodegradable mulch film has excellent barrier property and good longitudinal/transverse mechanical property.

Description

The preparation method of three-layer co-extruded Biodegradable mulch and three-layer co-extruded Biodegradable mulch
Technical field
The present invention relates to agricultural film field, particularly relate to the preparation of a kind of three-layer co-extruded Biodegradable mulch Method and three-layer co-extruded Biodegradable mulch.
Background technology
Plastics agricultural mulching has soil moisture conservation and heating effect to soil, brings volume increase good harvest for agricultural therewith, It is described as, in China, the third time revolution that agriculturally collects after chemical fertilizer and seed.China is that annual use is gathered The country that ethylene mulch film is most, is used primarily in the crops such as Nicotiana tabacum L., Cotton Gossypii, Semen Maydis, vegetable, polyethylene Mulch film, while bringing enormous benefits to agricultural, brings serious " white pollution " to ecological environment, According to incompletely statistics, Some Regions, Xinjiang polyethylene ground film residual quantity reaches 10-25kg, and is persistently increasing Adding, polyethylene ground film degradation time is up to more than 200 year, and annual a large amount of residual films are stayed in earth's surface and soil, Can not be degraded by microorganisms, not absorbed by crops, be less useful for cleaning and reclaim, causing farming The thing underproduction and Soil structure are hardened, and endanger ecological environment.
In presently disclosed patent, mainly introducing photosensitizer in polyethylene, it is in the effect of ultraviolet Under, fragment is become through after a while, mainly polyethylene molecule chain interruption, but can not be degradable, Accumulate over a long period and remain in soil, cause crop production reduction and " white pollution ".
Whole life cycle design material be after plastic film mulch under field conditions (factors) in 60-180 days complete biodegradable be Water, carbon dioxide and small-molecule substance etc., will not pollute soil, and degraded afterproduct can conduct Crop fertilizer, it is easy to plant growth, belongs to low-carbon (LC), environment-friendly materials.The Biodegradable mulch in the whole world at present Reach tens kinds, mainly had: the equal polyester of biodegradation, such as hydroxy fatty acid (salt) polymer (PHAs), polylactic acid (PLA), polycaprolactone (PCL)；Biodegradable Copolyester, such as polybutadiene Acid butanediol ester (PBS), poly-(succinic acid-butanediol ester tetramethylene adipate altogether) (PBSA)； Or there is the natural product of polysaccharide structures, such as thermoplastic starch (TPS), cellulose acetate etc..But Biodegradation material exists that various poor mechanical property, water conservation, soil moisture conservation be bad and degradation time is uncontrollable etc. Problem.
Summary of the invention
It is an object of the invention to, it is provided that the preparation method of a kind of three-layer co-extruded Biodegradable mulch, pass through Composite modified and the three-layer co-extruded technology of material, makes Biodegradable mulch have the barrier property of excellence with good Vertical/horizontal mechanical property.
The present invention also aims to, it is provided that a kind of three-layer co-extruded Biodegradable mulch, there is the resistance of excellence Separating performance and good vertical/horizontal mechanical property.
For achieving the above object, present invention firstly provides the preparation side of a kind of three-layer co-extruded Biodegradable mulch Method, is processed into thin film by interior layered material, middle material and outer layered material by three-layer co-extruded film-blowing process, described interior Layered material, middle material and outer layered material are correspondingly formed the internal layer of three-layer co-extruded Biodegradable mulch, centre respectively Layer and outer layer；
Described interior layered material includes following raw material components and quality proportioning: PBAT resin 40-60 part, non-grain form sediment Powder 20-30 part, non-grain starch modifying agent 6-10 part, herbicide 1-3 part, age resister 1-3 part；
Described middle material includes following raw material components and quality proportioning: PPC resin 60-80 part, modifying agent 10-20 part, water-retaining agent 1-4 part, cross-linking agent 0.3-1 part, binding agent 0.5-2 part；
Described outer layered material includes following raw material components and quality proportioning: PBAT resin 35-60 part, PLA Resin 10-25 part, chain extender 0.5-1 part, plasticizer are that 3-8 part, age resister 1-3 part, melt are strong Degree modifying agent 0.5-2 part.
In described interior layered material, described non-grain starch is: cross in the tapioca of 100 mesh sieves, sweet potato starch One；
Described non-grain starch modifying agent is: one or both in polyacrylonitrile, phosphate ester, Methanamide Mixture.
In described interior layered material, described herbicide is: in AKH7088 ester, fomesafen, cinidon-ethyl One or both mixture；
Described age resister is: four [β-(3,5-di-tert-butyl-hydroxy phenyl) propanoic acid] tetramethylolmethane The mixing of one or more in ester, thio-2 acid double lauryl, ESCALOL 567 Thing.
In described middle material, described modifying agent is: in ethanedioic acid, butyl ester of epoxy fatty acid, calcium stearate The mixture of two kinds；
Described water-retaining agent is: the one in polyacrylamide, SANWET；
Described cross-linking agent is: cumyl peroxide, 2,5-dimethyl-2,5 di-tert-butyl peroxide are own One in alkane, isocyanates；
Described binding agent is: ethylene acrylic acid co polymer, ethylene methyl acrylate methacrylic acid contract One in water glyceride.
In described outer layered material, described chain extender is: polyoxypropylene diamine, dimethoxy benzidine In one；
Described plasticizer is: one in PEG400, tributyl citrate, epoxy soybean oil or The mixture of two kinds；
Described age resister is: four [β-(3,5-di-tert-butyl-hydroxy phenyl) propanoic acid] tetramethylolmethane The mixing of one or more in ester, thio-2 acid double lauryl, ESCALOL 567 Thing；
Described melt strength modifying agent is: in poly-terephthalate p-phenylenediamine, methyl methacrylate Kind.
In described three-layer co-extruded film-blowing process, used the draw ratio of three-layer co-extruded inflation film manufacturing machine be 28-32:1, Blow-up ratio is 1.5-3:1.
The present invention also provides for a kind of three-layer co-extruded Biodegradable mulch, including intermediate layer and lay respectively at The internal layer of interbed both sides and outer layer, described internal layer, intermediate layer and outer layer are respectively by interior layered material, middle level Material and outer layered material are correspondingly formed respectively；
Described interior layered material includes following raw material components and quality proportioning: PBAT resin 40-60 part, non-grain form sediment Powder 20-30 part, non-grain starch modifying agent 6-10 part, herbicide 1-3 part, age resister 1-3 part；
Described middle material includes following raw material components and quality proportioning: PPC resin 60-80 part, modifying agent 10-20 part, water-retaining agent 1-4 part, cross-linking agent 0.3-1 part, binding agent 0.5-2 part；
Described outer layered material includes following raw material components and quality proportioning: PBAT resin 35-60 part, PLA Resin 10-25 part, chain extender 0.5-1 part, plasticizer are that 3-8 part, age resister 1-3 part, melt are strong Degree modifying agent 0.5-2 part.
In described interior layered material, described non-grain starch is: the one in tapioca, sweet potato starch, mistake 100 mesh sieves；
Described non-grain starch modifying agent is: one or both in polyacrylonitrile, phosphate ester, Methanamide Mixture；
Described herbicide is: one or both in AKH7088 ester, fomesafen, cinidon-ethyl Mixture；
Described age resister is: four [β-(3,5-di-tert-butyl-hydroxy phenyl) propanoic acid] tetramethylolmethane The mixing of one or more in ester, thio-2 acid double lauryl, ESCALOL 567 Thing.
In described middle material, described modifying agent is: in ethanedioic acid, butyl ester of epoxy fatty acid, calcium stearate The mixture of two kinds；
Described water-retaining agent is: the one in polyacrylamide, SANWET；
Described cross-linking agent is: cumyl peroxide, 2,5-dimethyl-2,5 di-tert-butyl peroxide are own One in alkane, isocyanates；
Described binding agent is: ethylene acrylic acid co polymer, ethylene methyl acrylate methacrylic acid contract One in water glyceride.
In described outer layered material, described chain extender is: polyoxypropylene diamine, dimethoxy benzidine In one；
Described plasticizer is: one in PEG400, tributyl citrate, epoxy soybean oil or The mixture of two kinds；
Described age resister is: four [β-(3,5-di-tert-butyl-hydroxy phenyl) propanoic acid] tetramethylolmethane The mixing of one or more in ester, thio-2 acid double lauryl, ESCALOL 567 Thing；
Described melt strength modifying agent is: in poly-terephthalate p-phenylenediamine, methyl methacrylate Kind.
Beneficial effects of the present invention: the preparation method of the three-layer co-extruded Biodegradable mulch of the present invention, by interior Layered material, middle material and outer layered material are processed into thin film by three-layer co-extruded film-blowing process, change by material is compounding Property and three-layer co-extruded technology so that Biodegradable mulch have excellence blocking oxygen, water vapo(u)r transmission Energy and good vertical/horizontal mechanical property.The three-layer co-extruded Biodegradable mulch of the present invention, has excellence Barrier property and good vertical/horizontal mechanical property.
Accompanying drawing explanation
In order to be able to be further understood that inventive feature and technology contents, refer to below in connection with this Bright detailed description and accompanying drawing, but accompanying drawing only provides reference and explanation use, is not used for adding the present invention To limit.
In accompanying drawing,
Fig. 1 is the schematic diagram of the preparation method of the three-layer co-extruded Biodegradable mulch of the present invention.
Detailed description of the invention
By further illustrating the technological means and effect thereof that the present invention taked, below in conjunction with the present invention's Preferred embodiment and accompanying drawing thereof are described in detail.
Referring to Fig. 1, the preparation method of the three-layer co-extruded Biodegradable mulch that the present invention provides, by internal layer Material, middle material and outer layered material are processed into thin film, described interior layered material, middle level by three-layer co-extruded film-blowing process Material and outer layered material are correspondingly formed the internal layer of three-layer co-extruded Biodegradable mulch, intermediate layer and outer layer respectively；
Described interior layered material includes following raw material components and quality proportioning: PBAT resin 40-60 part, non-grain form sediment Powder 20-30 part, non-grain starch modifying agent 6-10 part, herbicide 1-3 part, age resister 1-3 part；
Described middle material includes following raw material components and quality proportioning: PPC resin 60-80 part, modifying agent 10-20 part, water-retaining agent 1-4 part, cross-linking agent 0.3-1 part, binding agent 0.5-2 part；
Described outer layered material includes following raw material components and quality proportioning: PBAT resin 35-60 part, PLA Resin 10-25 part, chain extender 0.5-1 part, plasticizer are that 3-8 part, age resister 1-3 part, melt are strong Degree modifying agent 0.5-2 part.
Specifically, the concrete technical scheme of described three-layer co-extruded film-blowing process is as follows:
After interior layered material, middle material and outer layered material being measured according to recipe requirements, it is separately added into three-layer co-extruded blowing In the hopper of film machine, open the three-layer co-extruded inflation film manufacturing machine having pressed predetermined temperature heating, interior layered material, middle level Material and outer layered material, by melted under certain heating-up temperature, shearing, are made thin at triple extrusion die head mouth Film, then by inflation, cool down, shape, prepare three-layer co-extruded Biodegradable mulch, finally by receipts Winding apparatus rolling, it is preferred that described three-layer co-extruded inflation film manufacturing machine draw ratio is 28-32:1, blow-up ratio is 1.5- 3:1。
Specifically, described non-grain starch is: the one in tapioca, sweet potato starch, and starch mesh number is 100 mesh, the most described non-grain starch was the starch of 100 mesh sieves.
Specifically, described non-grain starch modifying agent is: the one in polyacrylonitrile, phosphate ester, Methanamide Or the mixture of two kinds.
Specifically, described herbicide is: the one in AKH7088 ester, fomesafen, cinidon-ethyl Or the mixture of two kinds.
Specifically, described age resister is: four [β-(3,5-di-tert-butyl-hydroxy phenyl) propanoic acid] seasons One or more in Doutrate, thio-2 acid double lauryl, ESCALOL 567 Mixture.
Specifically, described modifying agent is: two kinds in ethanedioic acid, butyl ester of epoxy fatty acid, calcium stearate Mixture.
Specifically, described water-retaining agent is: the one in polyacrylamide, SANWET.
Specifically, described cross-linking agent is: cumyl peroxide, 2,5-dimethyl-2,5 di-t-butyl mistakes One in oxidation hexane, isocyanates.
Specifically, described binding agent is: ethylene acrylic acid co polymer, ethylene methyl acrylate methyl One in glycidyl acrylate.
Specifically, described chain extender is: in polyoxypropylene diamine, dimethoxy benzidine Kind.
Specifically, described plasticizer is: in PEG400, tributyl citrate, epoxy soybean oil One or both mixture.
Specifically, described melt strength modifying agent is: poly-terephthalate p-phenylenediamine, methyl methacrylate One in ester.
The preparation method of the three-layer co-extruded Biodegradable mulch of the present invention, by interior layered material, middle material and outer layer Material is processed into thin film by three-layer co-extruded film-blowing process, by the composite modified and three-layer co-extruded technology of material, Biodegradable mulch is made to have blocking oxygen, water vapo(u)r transmission energy and the good vertical/horizontal power of excellence Learn performance.
The present invention also provides for a kind of three-layer co-extruded Biodegradable mulch, including intermediate layer and lay respectively at Between the internal layer of tunic both sides and outer layer, described internal layer, intermediate layer and outer layer are respectively by interior layered material, middle level Material and outer layered material are correspondingly formed respectively；
Specifically, described non-grain starch is: the one in tapioca, sweet potato starch, and starch mesh number is 100 mesh, the most described non-grain starch was the starch of 100 mesh sieves.
Specifically, described non-grain starch modifying agent is: the one in polyacrylonitrile, phosphate ester, Methanamide Or the mixture of two kinds.
Specifically, described herbicide is: the one in AKH7088 ester, fomesafen, cinidon-ethyl Or the mixture of two kinds.
Specifically, described age resister is: four [β-(3,5-di-tert-butyl-hydroxy phenyl) propanoic acid] seasons One or more in Doutrate, thio-2 acid double lauryl, ESCALOL 567 Mixture.
Specifically, described modifying agent is: two kinds in ethanedioic acid, butyl ester of epoxy fatty acid, calcium stearate Mixture.
Specifically, described water-retaining agent is: the one in polyacrylamide, SANWET.
Specifically, described cross-linking agent is: cumyl peroxide, 2,5-dimethyl-2,5 di-t-butyl mistakes One in oxidation hexane, isocyanates.
Specifically, described binding agent is: ethylene acrylic acid co polymer, ethylene methyl acrylate methyl One in glycidyl acrylate.
Specifically, described chain extender is: in polyoxypropylene diamine, dimethoxy benzidine Kind.
Specifically, described plasticizer is: in PEG400, tributyl citrate, epoxy soybean oil One or both mixture.
Specifically, described melt strength modifying agent is: poly-terephthalate p-phenylenediamine, methyl methacrylate Ester.
In sum, the preparation method of the three-layer co-extruded Biodegradable mulch of the present invention, by interior layered material, in Layered material and outer layered material are processed into thin film by three-layer co-extruded film-blowing process, composite modified by material and three layers Co-extrusion technology so that Biodegradable mulch has the blocking oxygen of excellence, water vapo(u)r transmission energy and good Vertical/horizontal mechanical property.The three-layer co-extruded Biodegradable mulch of the present invention, has the barrier property of excellence With good vertical/horizontal mechanical property.
The above, for the person of ordinary skill of the art, can be according to the technical side of the present invention Other various corresponding changes and deformation are made in case and technology design, and all these change and deformation are all answered Belong to the protection domain of appended claims of the present invention.

Claims (10)

1. the preparation method of a three-layer co-extruded Biodegradable mulch, it is characterised in that by interior layered material, in Layered material and outer layered material are processed into thin film by three-layer co-extruded film-blowing process, described interior layered material, middle material and outer Layered material is correspondingly formed the internal layer of three-layer co-extruded Biodegradable mulch, intermediate layer and outer layer respectively；
Described interior layered material includes following raw material components and quality proportioning: PBAT resin 40-60 part, non-grain form sediment Powder 20-30 part, non-grain starch modifying agent 6-10 part, herbicide 1-3 part, age resister 1-3 part；
Described middle material includes following raw material components and quality proportioning: PPC resin 60-80 part, modifying agent 10-20 part, water-retaining agent 1-4 part, cross-linking agent 0.3-1 part, binding agent 0.5-2 part；
Described outer layered material includes following raw material components and quality proportioning: PBAT resin 35-60 part, PLA Resin 10-25 part, chain extender 0.5-1 part, plasticizer are that 3-8 part, age resister 1-3 part, melt are strong Degree modifying agent 0.5-2 part.
The preparation method of three-layer co-extruded Biodegradable mulch the most as claimed in claim 1, its feature exists In, in described interior layered material, described non-grain starch is: cross in the tapioca of 100 mesh sieves, sweet potato starch One；
Described non-grain starch modifying agent is: one or both in polyacrylonitrile, phosphate ester, Methanamide Mixture.
The preparation method of three-layer co-extruded Biodegradable mulch the most as claimed in claim 1, its feature exists In, in described interior layered material, described herbicide is: in AKH7088 ester, fomesafen, cinidon-ethyl One or both mixture；
Described age resister is: four [β-(3,5-di-tert-butyl-hydroxy phenyl) propanoic acid] tetramethylolmethane The mixing of one or more in ester, thio-2 acid double lauryl, ESCALOL 567 Thing.
The preparation method of three-layer co-extruded Biodegradable mulch the most as claimed in claim 1, its feature exists In, in described middle material, described modifying agent is: in ethanedioic acid, butyl ester of epoxy fatty acid, calcium stearate The mixture of two kinds；
Described water-retaining agent is: the one in polyacrylamide, SANWET；
Described cross-linking agent is: cumyl peroxide, 2,5-dimethyl-2,5 di-tert-butyl peroxide are own One in alkane, isocyanates；
Described binding agent is: ethylene acrylic acid co polymer, ethylene methyl acrylate methacrylic acid contract One in water glyceride.
The preparation method of three-layer co-extruded Biodegradable mulch the most as claimed in claim 1, its feature exists In, in described outer layered material, described chain extender is: polyoxypropylene diamine, dimethoxy benzidine In one；
Described plasticizer is: one in PEG400, tributyl citrate, epoxy soybean oil or The mixture of two kinds；
Described age resister is: four [β-(3,5-di-tert-butyl-hydroxy phenyl) propanoic acid] tetramethylolmethane The mixing of one or more in ester, thio-2 acid double lauryl, ESCALOL 567 Thing；
Described melt strength modifying agent is: in poly-terephthalate p-phenylenediamine, methyl methacrylate Kind.
The preparation method of three-layer co-extruded Biodegradable mulch the most as claimed in claim 1, its feature exists In, in three-layer co-extruded film-blowing process, the draw ratio being used three-layer co-extruded inflation film manufacturing machine is 28-32:1, inflation Ratio is 1.5-3:1.
7. a three-layer co-extruded Biodegradable mulch, it is characterised in that include intermediate layer and lay respectively at The internal layer of both sides, intermediate layer and outer layer, described internal layer, intermediate layer and outer layer are respectively by interior layered material, middle level Material and outer layered material are correspondingly formed respectively；
Described interior layered material includes following raw material components and quality proportioning: PBAT resin 40-60 part, non-grain form sediment Powder 20-30 part, non-grain starch modifying agent 6-10 part, herbicide 1-3 part, age resister 1-3 part；
Described middle material includes following raw material components and quality proportioning: PPC resin 60-80 part, modifying agent 10-20 part, water-retaining agent 1-4 part, cross-linking agent 0.3-1 part, binding agent 0.5-2 part；
Described outer layered material includes following raw material components and quality proportioning: PBAT resin 35-60 part, PLA Resin 10-25 part, chain extender 0.5-1 part, plasticizer are that 3-8 part, age resister 1-3 part, melt are strong Degree modifying agent 0.5-2 part.
Three-layer co-extruded Biodegradable mulch the most as claimed in claim 7, it is characterised in that described internal layer In material, described non-grain starch is: the one in tapioca, sweet potato starch, crosses 100 mesh sieves；
Described non-grain starch modifying agent is: one or both in polyacrylonitrile, phosphate ester, Methanamide Mixture；
Described herbicide is: one or both in AKH7088 ester, fomesafen, cinidon-ethyl Mixture；
Described age resister is: four [β-(3,5-di-tert-butyl-hydroxy phenyl) propanoic acid] tetramethylolmethane The mixing of one or more in ester, thio-2 acid double lauryl, ESCALOL 567 Thing.
Three-layer co-extruded Biodegradable mulch the most as claimed in claim 7, it is characterised in that described middle level In material, described modifying agent is: the mixing of two kinds in ethanedioic acid, butyl ester of epoxy fatty acid, calcium stearate Thing；
Described water-retaining agent is: the one in polyacrylamide, SANWET；
Described cross-linking agent is: cumyl peroxide, 2,5-dimethyl-2,5 di-tert-butyl peroxide are own One in alkane, isocyanates；
Described binding agent is: ethylene acrylic acid co polymer, ethylene methyl acrylate methacrylic acid contract One in water glyceride.
Three-layer co-extruded Biodegradable mulch the most as claimed in claim 7, it is characterised in that outside described In layered material, described chain extender is: the one in polyoxypropylene diamine, dimethoxy benzidine；
Described plasticizer is: one in PEG400, tributyl citrate, epoxy soybean oil or The mixture of two kinds；
Described age resister is: four [β-(3,5-di-tert-butyl-hydroxy phenyl) propanoic acid] tetramethylolmethane The mixing of one or more in ester, thio-2 acid double lauryl, ESCALOL 567 Thing；
Described melt strength modifying agent is: in poly-terephthalate p-phenylenediamine, methyl methacrylate Kind.
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CN107148876A (en) * 2017-04-25 2017-09-12 安徽恒鑫环保新材料有限公司 It is a kind of can be with water conservation and the three-layer co-extruded biodegradable ground cover film of moisturizing
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CN109397809A (en) * 2018-10-29 2019-03-01 昆山金盟塑料薄膜有限公司 A kind of degradable composite membrane and preparation method thereof
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CN109485986A (en) * 2018-11-16 2019-03-19 山东隆昌塑业有限公司 A kind of dust-proof mulch that can be cleared up automatically
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CN109937774A (en) * 2019-03-21 2019-06-28 甘肃福雨塑业有限责任公司 Black three layers of composite mulching film of high photosynthetic efficiency environment-friendlyweather-proof weather-proof silvery white and preparation method thereof
CN109937772A (en) * 2019-03-21 2019-06-28 甘肃福雨塑业有限责任公司 Silver-colored three layers of composite mulching film of high photosynthetic efficiency environment-friendlyweather-proof weather-proof silvery white and preparation method thereof
CN110178609B (en) * 2019-05-24 2021-06-01 兰州鑫银环橡塑制品有限公司 Full-biodegradable mulching film in dry farming agricultural area and preparation method and application thereof
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