63results about How to "Fully degradable" patented technology

The invention relates to an edible starch-based food packaging film and a preparation method thereof. The edible starch-based packaging film with high mechanical strength, barrier property, ageing resistance and heat sealability is prepared from a main film-forming raw material stabilized crosslinking compound modified starch, and auxiliary materials such as food grade plasticizers, lubricants, reinforcers, stabilizers and the like through high speed stirring and mixing, twin-screw extrusion granulation and single-screw extrusion blow molding. The preparation method has the characteristics of low energy consumption, high production efficiency and suitability for continuous industrialized production. The film has the advantages of edibility, full-degradable property, wide application for inner packaging of foods and no environmental pollution caused by non-degradable food packages.

The invention provides an anti-side leakage sanitary napkin, which includes a surface non-woven fabric and a bottom impermeable membrane disposed from the inside out. The surface non-woven fabric has a three-piece structure, the intermediate piece of surface non-woven fabric and the two-wing surface non-woven fabrics are sticked together, and the space between the intermediate piece of surface non-woven fabric and the bottom impermeable membrane is filled with a toilet paper coated wood pulp cellulose absorption core. The surface of the sanitary napkin provided by the invention is composed of 100% polylactic acid fiber or PLA / PBHV fiber hot blast nonwoven fabric. The polylactic acid fiber retains the original characteristics and does not cause any damage. As polylactic acid is formed by polymerization of lactic acid molecules as monomers and spinning, polylactic acid molecules with short molecular chains possibly exist on the fiber surface, so that the pH value of a polylactic acid non-woven fabric surface shows weak acidity and is consistent with that of human body skin. Also an odor removal function is provided. The lateral two pieces of non-woven fabrics have greater gram weight and thickness than the intermediate piece, and side leakage cannot be caused.

The invention provides a degradable rare earth magnesium alloy medical biomaterial which is prepared by taking magnesium as a base alloy and adding a rare earth, zinc and zirconium according to a certain proportion relationship; the degradable rare earth magnesium alloy comprises the chemical composition by the mass percentage: 0.5-2.0 wt.% of Y, 0.1-0.5 wt.% of Dy, 0.8-1.2 wt.% of Zn, 0.35-0.55 wt.% of Zr, and the balance Mg and inevitable impurities. At the same time, the invention provides a preparation method of the degradable rare earth magnesium alloy medical biomaterial. The degradable rare earth magnesium alloy medical biomaterial has the following advantages: 1, the degradable rare earth magnesium alloy medical biomaterial has good mechanical properties and processing performance, and can meet the need of medical implant materials; 2, the degradable rare earth magnesium alloy medical biomaterial has good corrosion resistance, not only can be completely degraded, but also can ensure an appropriate corrosion speed; and 3, toxicity of alloying elements has strict limitation. The degradable rare earth magnesium alloy medical biomaterial is mainly used in medical metal materials.

The invention relates to the technical field of agricultural membrane product production methods, in particular to a method for producing a biodegradable membrane preventing from damaging a soil structure. The biodegradable membrane is prepared from starch, polyving akohol, a plasticizer, a lubricating agent and biodegradable polyester serving as raw materials. The method comprises the following steps of: mixing the raw materials according to a ratio; granulating by using a twin-screw extruder; and finally, blowing to form the membrane by using a film blowing machine. The method has the advantages of simple production process, less procedures and high efficiency; and packing materials prepared by the product of the invention are completely degraded into carbon dioxide and water in three months to one year when discarded in nature, and the degradation speed is high, so the biodegradable membrane is an ideal material for replacing the conventional common plastic film and treating white pollution.

The invention discloses a full-degradation cushion packaging material which is prepared from, by weight, 50 parts to 60 parts of starch, 20 parts to 30 parts of plant fibers, 5 parts to 10 parts of packing, 10 parts of 15 parts of starch plasticizer A, 5 parts to 10 parts of starch plasticizer B, 1 part to 5 parts of adhesive, 0.1 part to 1 part of release agent, 0.1 part to 1 part of foaming agent, and 100 parts to 120 parts of water, wherein the plant fibers are straw fibers or bagasse fibers, the packing is talcum powder, the starch plasticizer A is glycerinum or formamide, the starch plasticizer B is urea or ethanediol, the adhesive is polyvinyl alcohol, and the release agent is stearic acid. The invention further discloses a preparing method of the cushion packaging material which is a foaming hot-press forming method. The full-degradation cushion packaging material prepared with the method has the advantages that the raw materials are reproducible, the production process is free of pollution, and production cost is low.

The invention relates to pure polylactic acid tows and a cigarette filter trip of the pure polylactic acid tows. The pure polylactic acid tows are made of a spinning raw material formed by blending L-polylactic acid and D-polylactic acid (dextrorotation polylactic acid), wherein the L-polylactic acid accounts for 90-98% of the total weight, and the D-polylactic acid accounts for 2-8% of the total weight. The pure polylactic acid tows are spun by a conventional two-step process cigarette polypropylene staple melt spinning technology. The pure polylactic acid tows can be used for producing the cigarette filter trips with different hardness and have the advantages of being capable of effectively inhibiting molds and harmful bacteria in tobacco shreds and on the surfaces of cigarette holders, having compete biodegradability within three months and obvious mechanical affinity on carbonyl compounds in smoke gas and being capable of effectively intercepting harmful matters such as formaldehyde, acrolein and crotonaldehyde in smoke gas; and the interception efficiency of the pure polylactic acid tows is improved by more than 20% in comparison with the interception efficiency of a cellulose acetate filter trip.

The invention discloses a disposable total degradation dining tool and a preparation method thereof, which is characterized in that starch and plant fiber are used as main components; excipient with special uses is used as a product performance synthesis agent; heat melt water solution production technology is used for once synthesis; raw materials are characterized by non decomposing for a long time, precipitating and casual adjusting of water ratio between 35 percent to 60 percent. The product will not affect environment after being abandoned and can rapidly decompose under natural conditions and is a pure natural material or product without producing of harmful matter. The disposable total degradation dining tool and the preparation method thereof has the advantages of practical product, simple and reliable technical procedures, extensive and sufficient sources of raw materials and excipient, low price and large scaled industrialized production.

The invention provides a black sanitary towel. The black sanitary towel comprises a sanitary towel body, and the sanitary towel body comprises a surface non-woven fabric layer, an absorption core anda bottom impermeable membrane from top to bottom in sequence; the surface non-woven fabric layer comprises a middle sheet, retaining walls and side wings; the middle sheet is arranged in the middle ofthe surface non-woven fabric layer and used for cooperating with the bottom impermeable membrane and completely wrapping the absorption core; the side wings are arranged at the two sides of the surface non-woven fabric layer and used for fixing the sanitary towel body; the retaining walls are arranged at the two sides of the middle sheet and used for preventing an absorbed material which is absorbed by the middle sheet or the middle core from leaking from the sides; the side wings are fixedly connected with the middle sheet through partial retaining walls; the surface non-woven layer and thebottom impermeable membrane are both black. The black sanitary towel can meet the basic requirement of sanitary towels and have the advantages of bacterial inhibition, odor removal, moisture absorption and ventilation, soft and comfortable performance and complete degradation.

The invention relates to a completely degradable bone repairing material and a preparation method thereof, and belongs to the field of biomaterials. The repairing material takes degradable aliphatic polyester with biocompatibility and a natural degradable polymer as main raw materials, a black phosphorus nanometer multi-sheet layer capable of being completely biodegradable and accelerating bone formation is added, and an electrostatic spinning, solution pouring or 3D printing method is adopted to prepare the bone repairing material. The bone repairing material disclosed by the invention exhibits excellent complete degradability, bone defect repairing can be accelerated, a secondary operation is not required, and a problem that the bone repairing material is insufficient and incomplete in degradation in a body can be solved.

The invention discloses a woven fully-degradable magnesium alloy airway stent and a preparation method thereof. The magnesium alloy airway stent is integrally formed by weaving a magnesium alloy wire with the diameter of 0.1-0.5 mm; meshes in the surface of the magnesium alloy airway stent are quadrilateral; the area of a single mesh is 2-10 mm<2>; one-wire, two-wire or more-wire magnesium alloy wire with the diameter of 0.1-0.5 mm is woven. The fully-degradable magnesium alloy airway stent provided by the invention can improve the supporting force and the biocompatibility of the airway stent, achieve full degradation of the airway stent and overcome defects of the conventional stent. Therefore, the woven fully-degradable magnesium alloy airway stent is expected to be widely applied to an airway.

The invention relates to the field of disposable tableware, and aims to provide fully-degradable disposable vegetable fiber tableware which is capable of realizing full degradation. The fully-degradable disposable vegetable fiber tableware is prepared by mixing and pressing the following components in parts by weight: 65-80 parts of vegetable fibers, 6-8 parts of polyvinyl alcohol, 0.5-1.0 part of edible pigment, 1-2 parts of polyethylene wax, 1-2 parts of glycerol, 1-2 parts of sodium bicarbonate, 1-2 parts of edible gelatine, 1-2 parts of terpene resin and 1-2.5 parts of shellac.

The invention relates to a starch-based edible film and a preparation method thereof. The starch-based edible film is a starch-based edible packaging film with favorable flexibility, barrier property, ageing-resistance property and heat sealing property, which is prepared by adopting the preparation method comprising the following steps of: adding a food-grade plasticizer, a lubricating agent, a reinforcing agent, a stabilizing agent and other accessories by taking stably-degraded composite modified starch as a main film-forming raw material, stirring and mixing at high speed, carrying out double-screw extrusion granulation and then carrying out single-screw extrusion casting to obtain the finished product. The invention has the characteristics of low energy consumption and high production efficiency and is suitable for industrial continuous production. The prepared film in the invention has edibility and full degradability, can be widely applied to inner packaging of foods, and avoids non-degradable food packages from polluting the environment.

The invention discloses a GSH / ROS double-sensitive polymer capable of being completely degraded, and a preparation method and an application thereof. Natural cystine ester containing a disulfide bondand oxalyl chloride, which are used as raw materials, are ued to synthesize a novel carrier material polymer Cys-0E with an oxalate-like bond and the disulfide bond, and the polymer material can be successfully assembled to form a targeted delivery nano-system for efficiently loading various hydrophilic and hydrophobic drugs. Drug-loaded nano-particles constructed by a nano-precipitation technology have remarkable GSH / ROS dual responsiveness, and have the advantages of small particle size, high drug loading capacity, good in-vivo stability and specific tumor targeting; and complete degradationof the carrier and rapid and large-scale release of the entrapped drug are realized under the action of a tumor redox environment, so efficient inhibition of tumors in vitro and vivo is achieved. TheGSH / ROS double-sensitive polymer has the advantags of simplicity in synthesis, convenience in application, greenness, environmental friendliness, and promising application in the field of biologicaldrugs.

The invention discloses a biological full-degradable plastic film, which is mainly prepared from the following raw materials by weight: 48-72 parts of cassava starch, 35-45 parts of glycerin, 35-45 parts of polyvinyl alcohol, and 4-6 parts of hydrophilic nano-silica, wherein the cassava starch and hydrophilic nano-silica are in a weight ratio of 12:1. The preparation method of the biological full-degradable plastic film includes: conducting high-speed mixing, banburying and film casting on the raw materials, then subjecting the obtained plastic film to ultraviolet radiation treatment, and then performing drying. The biological full-degradable plastic film provided by the invention has the advantages of excellent mechanical properties, fast degradation speed, simple formula, and low production cost, etc.

The invention discloses a disposable infusion device. The infusion device includes an infusion catheter, a dropping hopper, an anti-bubble liquid dropping device, a dropper body, a liquid inlet hole,a dropper body fixing base, a dropper body connecting catheter, a vent hole, an air inlet plug, a liquid inlet pipe, a liquid inlet needle, an air pressure balancing needle, a balancing pipe and a heavy ion microporous film; the integral anti-bubble liquid dropping device is composed of the dropper body above, the dropper body fixing base in the middle, the dropper body connecting catheter below and the heavy ion microporous film fixed into the dropper body connecting catheter; by additionally arranging the heavy ion microporous film, after infusion is finished, partial medicinal liquid can remain on the heavy iron microporous film, blood reflux caused by complete dropping of the medicinal liquid is avoided, and liquid stopping is achieved at the same time; the infusion catheter and the dropping hopper adopt modified polyvinyl chloride as a raw material, not only is the physical mechanical performance of a traditional polyvinyl chloride material preserved, but also complete degradationis achieved, pollution is not caused to the environment, and environmental protection is facilitated. Moreover, since DEHP and other toxic additives are not added during preparation, important indicators such as heavy metal content and cytotoxicity are all superior to those of congeneric polyvinyl chloride products, and the infusion device is much safer to use.

The invention discloses a composite crosslinking amylomaize based fully degradable material and a preparation method thereof, relating to a cornstarch based fully degradable material and a preparation method thereof and solving the problem that the traditional amylomaize based degradable material and a starch degradable material modified physically or chemically have poor mechanical property. The product is prepared from composite crosslinking amylomaize, polycaprolactone, calcium carbonate, solid paraffin, stearic acid and glycerol, wherein the composite crosslinking amylomaize is prepared form amylomaize, epichlorohydrin and sodium hexametaphosphate. The preparation method comprises the steps of adding the epichlorohydrin into the alkaline amylomaize and stirring; adding the sodium hexametaphosphate into the alkaline amylomaize and stirring, washing and filtering to obtain the composite crosslinking amylomaize; and finally mixing and calendaring the composite crosslinking amylomaize together with the calcium carbonate, the solid paraffin, the stearic acid and the glycerol. The composite crosslinking amylomaize based fully degradable material has the tensile strength of 28-40MPa and can be used as food wrappage and agricultural mulching films.

The invention relates to the technical field of a production method of a degradable material, in particular to a preparation method of a polylactic acid degradable material. The method comprises the following steps: firstly, preparing the following raw materials in percentage by weight: 50-95% of polylactic acid, 4-45% of polyhydric polyester and 1-5% of talcum powder; adding the polylactic acid,the polyhydric polyester and the talcum powder to a high-speed mixer, and uniformly stirring; and finally, placing the uniformly-mixed materials in a pelletizer, mixing, melting, extruding, cooling, and pelleting to obtain the degradable material. The production method of the invention has the advantage of simple process, adopts a one-step method to mix the various materials, and uses a double screw extruder to pelletize the materials to obtain the prepared material. The film made of the degradable material prepared by the invention has the advantages of good film formation and various excellent performance indices.

The invention relates to a polylactic acid (PLA)-based fully degradable material special for an anti-glare board and a preparation method for the PLA-based fully degradable material, and belongs to the technical field of the modification of polymer materials. The invention is characterized in that the material is prepared from the following raw materials in percentage by mass: 60 to 68 percent of polylactic acid, 20 to 30 percent of toughened and reinforced modifier, 0.25 to 0.35 percent of tetra[3-(3',5'-ditert-butyl-4'-hydroxylphenyl)propionic acid]pentaerythritol ester, 0.2 to 0.3 percent of 2-hydroxy-4-(octyloxy)benzophenone, 2.0 to 2.6 percent of stearic acid, 0.1 to 0.2 percent of phthalocyanine green and 5 to 11 percent of acetyl-tri-n-butyl citrate. The special material has full degradation performance and does not pollute the environment. Three basic elements, namely 'blowing resistance, impact resistance and unchanged color' which are used for the making of anti-glare boards can be met, so the material is a preferred high-quality material for the making of third-generation anti-glare boards.

The invention relates to the technical field of producing methods of degradable materials, in particular to a preparation method of a biological resin material for a blown film. The preparation method comprises the following steps of: adding modified starch, poly(butylene succinate), talcum powder, urea and ethylene-acrylicacid copolymer into a high-speed mixer, stirring for 2 minutes, slowly adding glycerol, sorbitol and glyceride and pressing a button of low-speed rotation and high-speed operation to enable the materials to be sufficiently stirred evenly in the mixer; placing the evenly mixed material into a pelletizer for mixing, and then melting, extruding, cooling and dicing to obtain a biodegradable resin granular material for manufacturing a water retention membrane. The production process has simple process, less working procedures and high efficiency. A film manufactured by adopting the biological resin material can be completely decomposed into carbon dioxide and water within three mouths to one year after being abandoned in the nature and has high decomposing speed, thereby the biological resin material is an ideal material for replacing the traditional non-degradable water retention membrane and managing the white pollution of farmlands.

The invention belongs to the technical field of building materials, particularly discloses an alkali lignin and polylactic acid resin composite environmentally-friendly plate, and further discloses apreparation method of the alkali lignin and polylactic acid resin composite environmentally-friendly plate. The alkali lignin and polylactic acid resin composite environmentally-friendly plate is formed by hot-pressing and co-extruding a first outer surface layer, a buffer layer, an inner layer and a second outer surface layer which are sequentially stacked, and the first outer surface layer, thebuffer layer, the inner layer and the second outer surface layer are respectively prepared from alkali lignin and polylactic resin particles, powder particles and polylactic resin particles in different proportions. The alkali lignin and the polylactic acid are combined and developed to obtain the novel degradable plate, so that the high-valued utilization of the alkali lignin can be realized, theuse requirements of buildings and home decoration industries can be met, the use amount of wood in building materials can be reduced, and low-carbon, environmentally-friendly and green economy is realized.

According to the preparation method of the anti-deformation acrylic plate with the heat insulation and heat preservation functions, the acrylic plate base layer is prepared in a methyl methacrylate, butyl acrylate and diallyl adipate ternary polymerization mode, the strength of the acrylic plate is greatly improved, and the mechanical property is improved; wheat straw fibers and glass fibers are mixed and woven to prepare a fiber layer, and the fiber layer is used as an anti-deformation layer to enhance the anti-deformation capability of the acrylic plate; nano-silver-loaded nanofiber crystals are prepared from nanocrystalline cellulose, glucose and a silver ammonia solution, the antibacterial property of the acrylic plate is improved, and after graphene oxide quantum dots are added, the fiber entanglement capacity is improved, the internal stress of the acrylic plate is reduced, and the thermal insulation performance of the acrylic plate is improved; the hollow glass beads are uniformly dispersed in the foamed polyurethane to prepare the heat preservation layer, the hollow glass beads and the foamed polyurethane play a synergistic role in improving the heat resistance of the acrylic plate, and the heat insulation and heat preservation performance of the acrylic plate can be greatly improved by optimizing the component proportion.

The invention provides a manufacturing method of an artificial inorganic imitated stone texture decorative plate, the modified cellulose is prepared from the wheat straw and the corn straw, and the mechanical property of the decorative plate is improved through the synergistic effect of the modified cellulose, the coal ash and the white carbon black; foamed glass is prepared by uniformly coating the surfaces of hollow glass beads with a layer of graphite-like phase carbon nitride, and the foamed glass is pressed on the main body mixture to form a thermal insulation layer, so that the high temperature resistance and flame retardance of the decorative plate are improved; by adding and rographolide and radix isatidis, the mildew-proof and antibacterial properties of the decorative plate are improved; the insulating layer is coated with an imitated stone coating. The decorative plate produced by the method realizes reasonable matching of high strength, obdurability, high temperature resistance and water resistance, and has the advantages of lower production cost, higher process applicability, higher operability, controllable product quality and the like.

The invention belongs to the technical field of wastewater treatment, and particularly relates to an energy-saving environmentally-friendly treatment method for sewage in a power generation system. Aiming at the prior art that in the treatment process of landfill leachate, more incineration equipment is required, and combustion heat cannot be effectively utilized, the invention provides the following technical solution: [1] performing primary sedimentation to remove suspended matter; [2] allowing an influent water quantity and influent water quality to be uniform respectively by utilizing a quantity homogenizing tank and a quality homogenizing tank; [3] performing an anaerobic reaction in an anaerobic reaction tank, collecting biogas generated by the anaerobic reaction, introducing the biogas into an incinerator, and performing incineration to generate a high-temperature flue gas; [4] performing nitrification: performing denitrification treatment; [5] performing a membrane biological reaction: performing solid-liquid separation, and performing a biochemical reaction on the sewage; [6] performing nanofiltration: performing nanofiltration to further remove macromolecular organic matter and high-valent charged ions in water to obtain a treated clear liquid; and [7] performing incineration on sludge: collecting the sludge produced in each step, performing uniform preheating and drying, sending the dried sludge to an incinerator, and performing incineration. The method provided by the invention is applicable to treatment of the landfill leachate.

A rotator cuff patch based on fibroin gel comprises a rotator cuff patch body, a fibroin electrostatic spinning membrane serving as a patch base layer, fibroin gel containing Mg < 2 + > ions serving as a load anti-inflammatory drug layer and fibroin gel containing Zn < 2 + > ions serving as a load healing promoting drug layer, and the rotator cuff patch has the full-degradation characteristic, inhibits inflammatory response in the early stage, promotes osteogenesis in the repair period, and has the advantages of being free of side effects, free of side effects and the like. The effect of promoting graft integration is achieved, and the biological safety is higher.

The invention discloses a degradable composite material containing coffee grounds and a preparation method thereof. According to the technical scheme, coffee grounds, a natural adhesive material or an artificially synthesized water-soluble degradable high polymer material and a coagulator are included, during preparation, the raw materials are evenly mixed to form a mixture, and then the mixture is made into a required product shape through mechanical mold pressing or extrusion molding or manual molding, and finally, low-temperature baking curing or natural air-drying curing is carried out on the molded product. According to the scheme, both wet coffee grounds and dry coffee grounds can be utilized, the preparation method is simple and rapid, the fragrance of the coffee grounds can be reserved and utilized, meanwhile, processing and manufacturing are simple, energy is saved, environment friendliness is achieved, and the prepared composite material product is good in strength and can be degraded conveniently and rapidly.

The invention provides a biodegradable rare-earth magnesium alloy medical biomaterial, which is made of magnesium as the base alloy and added with rare earth, zinc and zirconium elements according to a certain ratio. The chemical composition of the degradable rare-earth magnesium alloy is: Y0 .5-2.0wt.%, Dy0.1-0.5wt.%, Zn0.8-1.2wt.%, Zr? 0.35-0.55wt.%, the rest is Mg and unavoidable impurity elements. At the same time, a preparation method of the biodegradable rare earth magnesium alloy medical biomaterial is provided, including the following steps: (1) alloy smelting, (2) alloy extrusion, and (3) alloy heat treatment. The invention has the following advantages: 1. It has good mechanical properties and processing properties, which can meet the needs of medical implant materials; 2. It has good corrosion resistance, which can not only achieve complete degradation, but also ensure an appropriate corrosion rate; 3. , The toxicity of alloying elements is strictly limited. The invention is mainly used in medical metal materials.

A rotator cuff patch based on a cellulose gelatin coating comprises a rotator cuff patch body, a cellulose electrostatic spinning membrane serving as a patch substrate layer, gelatin containing chondroitin sulfate serving as a load anti-inflammatory drug layer and gelatin containing astragalus extract serving as a load healing promoting drug layer, and the rotator cuff patch can inhibit inflammatory reaction in the early stage, promote tissue regeneration in the repair period and promote healing. The effect of promoting graft integration is achieved.

The invention discloses an organic matter photocatalytic degradation device and system. The invention relates to the technical field of organic wastewater treatment. The device comprises a reaction chamber and a water storage chamber, a fluid inlet is formed in the upper part of the reaction chamber, the lower part of the reaction chamber is communicated with the water storage chamber through a fluid channel, a fluid outlet is formed in the lower part of the water storage chamber and is higher than the fluid channel. The system comprises a plurality of layers of the organic matter photocatalytic degradation devices which are sequentially communicated, the reaction chambers are used for mounting a photocatalytic light source and storing photocatalytic particles, organic wastewater and gas are introduced through the fluid inlet, sufficient oxygen can be provided for the photocatalytic particles, and excessive moisture near the photocatalytic light source can be taken away; gas flows intothe reaction chambers in the fluid outlet direction, the organic wastewater in the reaction chambers is promoted to roll and shift the photocatalytic particles and clean the outer wall of the photocatalytic light source, so that organic matters in the organic wastewater are fully adsorbed and degraded, and the photocatalytic degradation efficiency of the organic matters is improved.

The invention discloses a preparation method of a thermoplastic starch material based on non-grain woody plant oil and fat. The preparation method comprises the steps of stirring fatty acid and derivatives thereof, heating and controlling the temperature to 140-160 DEG C; then, dropwise adding micromolecular polyamine according to the proportion that the mole ratio of the carboxy group of the micromolecular polyamine to the carboxy groups of the fatty acid and the derivatives thereof is (1.1-1.4):1; then, adding a catalyst, wherein the catalyst accounts for 0.25-2.5% of the total mass of a reaction system; raising the temperature to 180-220 DEG C, reacting for 1-4h, and removing unreacted micromolecular polyamine through reduced pressure distillation to obtain an aliphatic amide plasticizer; uniformly mixing the prepared aliphatic amide plasticizer, glycerol and starch according to the mass proportion of (10-50):(10-30):70, collecting the material and storing the material in a sealed way at room temperature for 12-36h; finally, processing the material under the condition of 100-160 DEG C by using a kneading method to obtain the thermoplastic starch material.

The invention relates to the technical field of agricultural membrane product production methods, in particular to a method for producing a biodegradable membrane preventing from damaging a soil structure. The biodegradable membrane is prepared from starch, polyving akohol, a plasticizer, a lubricating agent and biodegradable polyester serving as raw materials. The method comprises the following steps of: mixing the raw materials according to a ratio; granulating by using a twin-screw extruder; and finally, blowing to form the membrane by using a film blowing machine. The method has the advantages of simple production process, less procedures and high efficiency; and packing materials prepared by the product of the invention are completely degraded into carbon dioxide and water in three months to one year when discarded in nature, and the degradation speed is high, so the biodegradable membrane is an ideal material for replacing the conventional common plastic film and treating white pollution.