WO2015059685A1 - A method of producing biodegradable composite - Google Patents
A method of producing biodegradable composite Download PDFInfo
- Publication number
- WO2015059685A1 WO2015059685A1 PCT/ID2014/000008 ID2014000008W WO2015059685A1 WO 2015059685 A1 WO2015059685 A1 WO 2015059685A1 ID 2014000008 W ID2014000008 W ID 2014000008W WO 2015059685 A1 WO2015059685 A1 WO 2015059685A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- producing
- biodegradable composite
- starch
- mixture
- ground
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 65
- 239000002131 composite material Substances 0.000 title claims abstract description 44
- 239000000203 mixture Substances 0.000 claims abstract description 37
- 229920002472 Starch Polymers 0.000 claims abstract description 30
- 235000019698 starch Nutrition 0.000 claims abstract description 30
- 239000008107 starch Substances 0.000 claims abstract description 30
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 22
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 22
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 239000008188 pellet Substances 0.000 claims abstract description 15
- 239000011148 porous material Substances 0.000 claims abstract description 15
- 239000000654 additive Substances 0.000 claims abstract description 14
- 238000004898 kneading Methods 0.000 claims abstract description 13
- 239000010419 fine particle Substances 0.000 claims abstract description 9
- 238000000227 grinding Methods 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 230000000087 stabilizing effect Effects 0.000 claims abstract 3
- 239000002245 particle Substances 0.000 claims description 12
- 240000003183 Manihot esculenta Species 0.000 claims description 5
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 claims description 5
- 229920001971 elastomer Polymers 0.000 claims description 5
- 239000000806 elastomer Substances 0.000 claims description 5
- 229920002261 Corn starch Polymers 0.000 claims description 4
- 229920000881 Modified starch Polymers 0.000 claims description 4
- 239000004368 Modified starch Substances 0.000 claims description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- 150000001408 amides Chemical class 0.000 claims description 4
- 239000002981 blocking agent Substances 0.000 claims description 4
- 239000004202 carbamide Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000008120 corn starch Substances 0.000 claims description 4
- 238000007710 freezing Methods 0.000 claims description 4
- 235000019426 modified starch Nutrition 0.000 claims description 4
- 239000003607 modifier Substances 0.000 claims description 4
- 239000004014 plasticizer Substances 0.000 claims description 4
- 229920002554 vinyl polymer Polymers 0.000 claims 1
- 238000000518 rheometry Methods 0.000 abstract description 7
- 229920003023 plastic Polymers 0.000 description 12
- 239000004033 plastic Substances 0.000 description 12
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 9
- 238000001125 extrusion Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 229920000704 biodegradable plastic Polymers 0.000 description 5
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical group NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 235000011187 glycerol Nutrition 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002952 polymeric resin Substances 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 238000006065 biodegradation reaction Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229920000747 poly(lactic acid) Polymers 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- JAGCDHVEZBRMTL-BTJKTKAUSA-N CCCCOC(=O)C=C.O=C\1OCCOC(=O)\C=C/1 Chemical group CCCCOC(=O)C=C.O=C\1OCCOC(=O)\C=C/1 JAGCDHVEZBRMTL-BTJKTKAUSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 244000097202 Rathbunia alamosensis Species 0.000 description 2
- 235000009776 Rathbunia alamosensis Nutrition 0.000 description 2
- 229920002988 biodegradable polymer Polymers 0.000 description 2
- 239000004621 biodegradable polymer Substances 0.000 description 2
- 229920001222 biopolymer Polymers 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 229910021538 borax Inorganic materials 0.000 description 2
- 239000002361 compost Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- -1 poly(lactic acid) Polymers 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000004328 sodium tetraborate Substances 0.000 description 2
- 235000010339 sodium tetraborate Nutrition 0.000 description 2
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 229920006167 biodegradable resin Polymers 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000088 plastic resin Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 235000010356 sorbitol Nutrition 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/002—Methods
- B29B7/007—Methods for continuous mixing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/72—Measuring, controlling or regulating
- B29B7/726—Measuring properties of mixture, e.g. temperature or density
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/02—Homopolymers or copolymers of unsaturated alcohols
- C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/16—Auxiliary treatment of granules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2003/00—Use of starch or derivatives as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2029/00—Use of polyvinylalcohols, polyvinylethers, polyvinylaldehydes, polyvinylketones or polyvinylketals or derivatives thereof as moulding material
- B29K2029/04—PVOH, i.e. polyvinyl alcohol
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0088—Blends of polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0059—Degradable
- B29K2995/006—Bio-degradable, e.g. bioabsorbable, bioresorbable or bioerodible
-
- 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
- C08J2329/00—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 at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2329/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2329/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- 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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
Definitions
- This invention relates toa method of producing biodegradable composite under controlled rheology and processing conditionfrom natural or modified starch, with addition of polyvinyl alcohol, polyhydric alcohol, and other additives.
- plastics do not biodegrade regardless of environmental conditions, while some do so but in a time-consuming way by exposing to air, water and light. Due to high concerns on environmental issues these days, someplastics have been engineered to become biodegradable, and waysto accelerate biodegradation of the plastics are also being studied in the polymer industries.
- Biodegradable plastics can be broken down by microorganism into water, carbon dioxide and some other organic matter that can be utilized by living organism.
- the biodegradable plastics are mainly produced from plants which make the plastic biodegradable, thus replacing the conventional petroleum-based plastics.
- composition comprises poly(lactic acid) (PLA) polymer and components of natural origin, includingstarch and protein material.
- PLA poly(lactic acid)
- the composition provides improved mechanical properties obtainable by providing PLA, starch and protein material according to the ratio, mixing to afford a homogeneous mixture, subjecting the mixture to extrusion compounding, drying and conditioning the extruded polymeric product.
- a biodegradable plastic resin made from corn starch, tapioca, stearic acid, talc, glycerol, sorbitol, ethylene acrylic acid copolymer and completely biodegradable materials, which replaces the consumption of oil resources.
- the raw materials are mixed proportionally, and extruded by a modified twin screw extruder to produce a pellet.
- Film article made of the plastic resins has quick decomposition rate.
- Plastic extrusion is a high volume manufacturing process in which raw plastic material is melted and formed into a continuous profile. Control parameters during extrusion process therefore are vital to produce quality plastic resins with better mechanical and degradation behaviour. Moisture content in the plastic resins would affect the biodegradation rate too. According to Sina Ebnesajjad in Handbook of Biopolymers and Biodegradable Plastics: Properties, Processing and Applications, biodegradation proceeded faster in the compost prepared with a moisture content of 65% than in the compost prepared with a moisture content of 45 and 55%. Therefore, a method to produce a controlled rheology and processing condition is needed in the art.
- the present invention relates to a method of producing a biodegradable composite, characterised by the steps of: grinding starch into fine particles; grinding polyvinyl alcohol into fine particles; blending the ground starch in the range of 0-60% by total weight and ground polyvinyl alcohol in the range of 30-80% by total weight, with addition of additives to form a mixture; stabilizingthe mixture for a time period; subjecting the mixture to acontinuous kneadingprocess under various pressure and temperature to form non-porous material;extruding and cutting the non-porous material into pellet form; and stabilizingthe pellet for a time period to produce a biodegradable composite having controlled moisture content and rheology for further processing.
- Fig. 1 is a flow chart of a method of producing a biodegradable composite in accordance to the present invention.
- the present invention relates to a method of producing biodegradable composite with controlled rheology fromstarchsuch as tapioca starch, corn starch, natural starch or modified starch.
- the method of producing a biodegradable composite characterised by the steps of:
- ground starch in a range of 0-60% by total weight and ground polyvinyl alcohol in a range of 30-80% by total weight, with addition of additives to form a mixture;
- the starch is tapioca starch, corn starch, natural starch, or modified starch. In a preferred embodiment of the method of producing a biodegradable composite, the starch is ground to particle size of 25 - 40 microns.
- the polyvinyl alcohol is ground to particle size of 75 - 150 micrcons.
- the additives comprise of water, urea, anti-blocking agent, organic plasticizer, anti-freezing agent, buffer, amide compatibiliser, acrylic modifier, elastomer, and proprietary additives.
- the ground starch and ground polyvinyl alcohol are blended with addition of additives at temperature of 60-80°C.
- the ground starch and ground polyvinyl alcohol are blended with addition of additives for 30 - 60 minutes.
- the blended mixture is cooled to a temperature of 40-50°C before being stabilized.
- the mixture is stabilized in atmospheric condition to let the additives befuily absorbed in the mixturefor a time period of 24-48 hours.
- the continuous kneading process comprises the steps of intensive mixing and compressing the mixture to form non-porous material, followed by extruding and cutting into pellet form.
- the continuous kneadingprocess is performed at a temperature in a range of 60°C to 170°C.
- the continuous kneading process is performed under high pressure between 3000 - 15000 kilopascals (kPa) to control moisture content of the mixture.
- the pellet is stabilized for a time period of minimum one dayin atmospheric condition to obtain biodegradable composite in pelletform which eliminatesshrinkage property and possesses goodflow processablity when being processed by blow, injection, and extrusion machinesinto finished product.
- starch is obtained and ground to break the particles into fine particles with particle size of 25 - 40 microns.
- Polyvinyl alcohol is obtained in solid form and ground to break the particles to a particle size of 75 - 150 microns.
- the ground starch and ground polyvinyl alcohol is then blended in a high shear mixer, wherein 0-60% by total weight of ground starch and 30-80% by total weight of ground polyvinyl alcohol are mixed.
- the mixer for blending the particles of ground starch and ground polyvinyl alcohol is not limited to a high shear mixer, but any other blending tools may be used to obtain the desired mixing result.
- Additives including water, urea, anti-blocking agent, organic plasticizer, anti-freezing agent, buffer, amide compatibiliser, acrylic modifier, elastomer, and proprietary additives are added to the ground starch and ground polyvinyl alcohol while blending in the high shear mixer to form a mixture.
- the organic plasticiser is preferablypolyhydric alcoholincluding glycerine,glycol, or esters.
- the anti-blocking agent is preferably silica.
- the anti-freezing agent is preferably but not limited to glycol and glycerine.
- the buffer used in the present invention is preferably borax.
- the amide compatibiliser is preferably formamide.
- the acrylic modifier and elastomer is preferably ethylene maleat butyl acrylate.
- the elastomer is preferably ethylene vinyl acetate (EVA).
- the step of blending the ground starch and ground polyvinyl alcohol with addition of additives is carried out at a temperature range of 60-80°C for 30-60 minutes.
- the blended mixture is then cooled to a temperature of 40-50°C.
- the continuous kneading process comprises the steps of intensive mixing in a continuous kneaderand compressing the mixture under controlled condition.
- the continuous kneading process involves cooking the mixture at a temperature in a range of 60°C to 170°C, under high pressure in the range of 3000-15000 kPa to control moisture content of the mixture during mixing and compressing.
- the continuous kneading process at a high temperature, the water does not evaporate and turn into steam due to the high pressure control in the continuous kneader, therefore the water content in the mixture can be controlled.
- the continuous kneader comprises a specially design screws, wherein during kneading, the screws turn to knead and squeeze the particles to form homogenous non-porous material.
- the non-porous material is fed into an extruder and further cut into pellet form by a pelletizer and stabilizedfor a time period of minimum one day to obtain the biodegradable composite.
- the stabilizedbiodegradable composite is subjected to further processing into finished goods by blowing process, extrusion process, injection process, etc.
- Tapioca starch was ground into particle size of 25 - 40 microns and polyvinyl alcohol was ground into particle size of 75 - 150 micrcons separately.
- the ground starch and polyvinyl alcohol was blended in a mixer at 60-80°C for 30-60 minutes, with addition ofadditives including water, urea, silica, glycol, glycerine, borax, formamide, ethylene maleat butyl acrylate, ethylene vinyl acetate (EVA), and proprietary additives.
- the mixture was cooled to 40-50°Cand left for stabilizationfor 24-48 hours. Then, the mixture was undergone continuous kneading process at 60-170°C under high pressure between 3000-15000 kPato control moisture content of the mixture.
- the continuos kneading process included intensive mixingand compressing the mixture in a continuous kneaderto form non-porous material. Then, the non-porous material was fed into an extruder and furthercut into pellet form in a pelletizer and stabilizedfor one day to obtain the biodegradable composite with 4-15%moisture content.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The present invention relates to a method of producing a biodegradable composite, characterised by the steps of grinding starch into fine particles; grinding polyvinyl alcohol into fine particles; blending the ground starch and ground polyvinyl alcohol with addition of additives to form a mixture; stabilizing the mixture for a time period;subjecting the mixture to a continuous kneading process to form non-porous material;extruding and cutting the non-porous material into pellet form; and stabilizing the pellet for a time period to produce a biodegradable composite having controlled moisture content and rheology.
Description
A METHOD OF PRODUCING BIODEGRADABLE COMPOSITE
Technical Field of the Invention
This invention relates toa method of producing biodegradable composite under controlled rheology and processing conditionfrom natural or modified starch, with addition of polyvinyl alcohol, polyhydric alcohol, and other additives.
Background of Invention
Conventionally, plastics do not biodegrade regardless of environmental conditions, while some do so but in a time-consuming way by exposing to air, water and light. Due to high concerns on environmental issues these days, someplastics have been engineered to become biodegradable, and waysto accelerate biodegradation of the plastics are also being studied in the polymer industries. Biodegradable plastics can be broken down by microorganism into water, carbon dioxide and some other organic matter that can be utilized by living organism. The biodegradable plastics are mainly produced from plants which make the plastic biodegradable, thus replacing the conventional petroleum-based plastics. Disclosed in prior art US 2007/0 29467 A1 is a bio-based biodegradable polymer, which composition comprises poly(lactic acid) (PLA) polymer and components of natural origin, includingstarch and protein material. The composition provides improved mechanical properties obtainable by providing PLA, starch and protein material according to the ratio, mixing to afford a homogeneous mixture, subjecting the mixture to extrusion compounding, drying and conditioning the extruded polymeric product.
Also disclosed in WO 2007/134492 A1 a biodegradable plastic resin made from corn starch, tapioca, stearic acid, talc, glycerol, sorbitol, ethylene acrylic acid copolymer and completely biodegradable materials, which replaces the consumption of oil resources. The raw materials are mixed proportionally, and
extruded by a modified twin screw extruder to produce a pellet. Film article made of the plastic resins has quick decomposition rate.
Besides of using bio-composition for making plastic resins degrade at a higher rate, the method of producing the plastic resins is also playing an important role for higher decomposition rate whilst maintaining the quality of the plastic resins. There area variety of producing methods invented by researchers in the polymer industries. Disclosed in the earlier cited arts, US 2007/0129467 A1 and WO 2007/134492 A1 , wherein the process of producing the biodegradable polymer comprises mixing and extruding the raw materials to obtain the final product.
Plastic extrusion is a high volume manufacturing process in which raw plastic material is melted and formed into a continuous profile. Control parameters during extrusion process therefore are vital to produce quality plastic resins with better mechanical and degradation behaviour. Moisture content in the plastic resins would affect the biodegradation rate too. According to Sina Ebnesajjad in Handbook of Biopolymers and Biodegradable Plastics: Properties, Processing and Applications, biodegradation proceeded faster in the compost prepared with a moisture content of 65% than in the compost prepared with a moisture content of 45 and 55%. Therefore, a method to produce a controlled rheology and processing condition is needed in the art.
Disclosed in Patent Application with International Publication No. WO 2013/022851 A2 is methods and systems for controlling the moisture content of biodegradable and bioresorbable polymer resin during extrusion. During the extrusion, drying gas is passed through the polymer resin to remove moisture from the polymer resin, then, the moisture content of the polymer resin is maintained in a selected range. The method is specifically designed for making medical devices that are adapted to be implanted in a bodily lumen. Also, drying gas is used for controlling the moisture content. A simple yet cost effective method is thus needed as an alternative method to produce a biodegradable resin for replacing the existing method.
Accordingly, it can be seen in the prior arts that there exists a need to provide a method of producing biodegradable resinswith higher degradable rate yet maintain themechanical properties of the resin. - References
• Sina Ebnesajjad, Biodegradability Testing of Compostable Polymer Materials, Handbook of Biopolymers and Biodegradable Plastics: Properties, Processing and Applications,2012. Summary of Invention
It is the objective of the present invention to provide a method of producing a biodegradable composite.
It is also the objective of the present invention to provide a method of producing & biodegradable composite under controlled rheology of the composite, thus enabling further processability ofthe pellets into finished productsby blowing, injection, and extrusion process.
Accordingly, these objectives may be achieved by following the method of the present invention. The present invention relates to a method of producing a biodegradable composite, characterised by the steps of: grinding starch into fine particles; grinding polyvinyl alcohol into fine particles; blending the ground starch in the range of 0-60% by total weight and ground polyvinyl alcohol in the range of 30-80% by total weight, with addition of additives to form a mixture; stabilizingthe mixture for a time period; subjecting the mixture to acontinuous kneadingprocess under various pressure and temperature to form non-porous material;extruding and cutting the non-porous material into pellet form; and stabilizingthe pellet for a time period to produce a biodegradable composite having controlled moisture content and rheology for further processing.
Brief Description of the Drawings
The features of the invention will be more readily understood and appreciated from the following detailed description when read in conjunction with the accompanying drawings of the preferred embodiment of the present invention, in which: Fig. 1 is a flow chart ofa method of producing a biodegradable composite in accordance to the present invention.
Detailed Description of the Invention
As required, detailed embodiments of the present invention are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting but merely as a basis for claims. It should be understood that the drawings and detailed description thereto are not intended to limit the invention to the particular form disclosed, but on the contrary, the invention is to cover all modification, equivalents and alternatives falling within the scope of the present invention as defined by the appended claims. As used throughout this application, the word "may" is used in a permissive sense (i.e., meaning having the potential to), rather than the mandatory sense (i.e., meaning must). Similarly, the words "include," "including," and "includes" mean including, but not limited to. Further, the words "a" or "an" mean "at least one" and the word "plurality" means one or more, unless otherwise mentioned. Where the abbreviations or technical terms are used, these indicate the commonly accepted meanings as known in the technical field. For ease of reference, common reference numerals will be used throughout the figures when referring to the same or similar features common to the figures. The present invention will now be described with reference to Fig. 1.
The present invention relates toa method of producing biodegradable composite with controlled rheology fromstarchsuch as tapioca starch, corn starch, natural starch or modified starch. The method of producing a biodegradable compositecharacterised by the steps of:
grinding starch into fine particles;
grinding polyvinyl alcohol into fine particles;
blending the ground starch in a range of 0-60% by total weight and ground polyvinyl alcohol in a range of 30-80% by total weight, with addition of additives to form a mixture;
stabilizingthe mixture for a time period;
subjecting the mixture to acontinuous kneading process to form non-porous material;
extruding and cuttingthe non-porous material into pellet form; and stabilizingthe pellet for a time period to produce a biodegradable composite having controlled moisture content and rheology for further processing.
In a preferred embodiment of the method of producing a biodegradable composite, the starch is tapioca starch, corn starch, natural starch, or modified starch. In a preferred embodiment of the method of producing a biodegradable composite, the starch is ground to particle size of 25 - 40 microns.
In a preferred embodiment of the method of producing a biodegradable composite, the polyvinyl alcohol is ground to particle size of 75 - 150 micrcons.
In a preferred embodiment of the method of producing a biodegradable composite, the additives comprise of water, urea, anti-blocking agent, organic plasticizer, anti-freezing agent, buffer, amide compatibiliser, acrylic modifier, elastomer, and proprietary additives.
In a preferred embodiment of the method of producing a biodegradable composite, the ground starch and ground polyvinyl alcohol are blended with addition of additives at temperature of 60-80°C.
In a preferred embodiment of the method of producing a biodegradable composite, the ground starch and ground polyvinyl alcohol are blended with addition of additives for 30 - 60 minutes.
In a preferred embodiment of the method of producing a biodegradable composite, the blended mixture is cooled to a temperature of 40-50°C before being stabilized. In a preferred embodiment of the method of producing a biodegradable composite, the mixture is stabilized in atmospheric condition to let the additives befuily absorbed in the mixturefor a time period of 24-48 hours.
In a preferred embodiment of the method of producing a biodegradable composite, the continuous kneading process comprises the steps of intensive mixing and compressing the mixture to form non-porous material, followed by extruding and cutting into pellet form.
In a preferred embodiment of the method of producing a biodegradable composite, the continuous kneadingprocess is performed at a temperature in a range of 60°C to 170°C.
In a preferred embodiment of the method of producing a biodegradable composite, the continuous kneading process is performed under high pressure between 3000 - 15000 kilopascals (kPa) to control moisture content of the mixture.
In a preferred embodiment of the method of producing a biodegradable composite, the pellet is stabilized for a time period of minimum one dayin atmospheric condition to obtain biodegradable composite in pelletform which eliminatesshrinkage property and possesses goodflow processablity when being processed by blow, injection, and extrusion machinesinto finished product.
Firstly, starch is obtained and ground to break the particles into fine particles with particle size of 25 - 40 microns.Polyvinyl alcohol is obtained in solid form and ground to break the particles to a particle size of 75 - 150 microns.
The ground starch and ground polyvinyl alcohol is then blended in a high shear
mixer, wherein 0-60% by total weight of ground starch and 30-80% by total weight of ground polyvinyl alcohol are mixed. The mixer for blending the particles of ground starch and ground polyvinyl alcohol is not limited to a high shear mixer, but any other blending tools may be used to obtain the desired mixing result. Additives including water, urea, anti-blocking agent, organic plasticizer, anti-freezing agent, buffer, amide compatibiliser, acrylic modifier, elastomer, and proprietary additives are added to the ground starch and ground polyvinyl alcohol while blending in the high shear mixer to form a mixture. The organic plasticiser is preferablypolyhydric alcoholincluding glycerine,glycol, or esters. The anti-blocking agent is preferably silica. The anti-freezing agent is preferably but not limited to glycol and glycerine. The buffer used in the present invention is preferably borax. The amide compatibiliser is preferably formamide. The acrylic modifier and elastomer is preferably ethylene maleat butyl acrylate. The elastomer is preferably ethylene vinyl acetate (EVA).
The step of blending the ground starch and ground polyvinyl alcohol with addition of additives is carried out at a temperature range of 60-80°C for 30-60 minutes. The blended mixture is then cooled to a temperature of 40-50°C.
After the mixture is cooled, the mixture is left for a time period of 24-48 hours for stabilizingprocess in atmospheric condition.
Thereafter, the stabilized mixture is subjected to a continuous kneading process to form the non-porous material. The continuous kneading process comprises the steps of intensive mixing in a continuous kneaderand compressing the mixture under controlled condition. The continuous kneading process involves cooking the mixture at a temperature in a range of 60°C to 170°C, under high pressure in the range of 3000-15000 kPa to control moisture content of the mixture during mixing and compressing. During the continuous kneading process at a high temperature, the water does not evaporate and turn into steam due to the high pressure control in the continuous kneader, therefore the water content in the mixture can be
controlled.
The continuous kneadercomprises a specially design screws, wherein during kneading, the screws turn to knead and squeeze the particles to form homogenous non-porous material.
Next, the non-porous material is fed into an extruder and further cut into pellet form by a pelletizer and stabilizedfor a time period of minimum one day to obtain the biodegradable composite. The stabilizedbiodegradable compositeis subjected to further processing into finished goods by blowing process, extrusion process, injection process, etc.
Below is an example of a method of producing a biodegradable composite from which the advantages of the present invention may be more readily understood. It is to be understood that the following example is for illustrative purpose only and should not be construed to limit the present invention in any way.
- Examples
Tapioca starchwas ground into particle size of 25 - 40 microns and polyvinyl alcohol was ground into particle size of 75 - 150 micrcons separately. The ground starch and polyvinyl alcohol was blended in a mixer at 60-80°C for 30-60 minutes, with addition ofadditives including water, urea, silica, glycol, glycerine, borax, formamide, ethylene maleat butyl acrylate, ethylene vinyl acetate (EVA), and proprietary additives.The mixture Was cooled to 40-50°Cand left for stabilizationfor 24-48 hours. Then, the mixture was undergone continuous kneading process at 60-170°C under high pressure between 3000-15000 kPato control moisture content of the mixture. The continuos kneading process included intensive mixingand compressing the mixture in a continuous kneaderto form non-porous material. Then, the non-porous material was fed into an extruder and furthercut into pellet form in a pelletizer and stabilizedfor one day to obtain the biodegradable composite with 4-15%moisture content.
Although the present invention has been described with reference to specific embodiments, also shown in the appended figures, it will be apparent for those skilled in the art that many variations and modifications can be done within the scope of the invention as described in the specification and defined in the following claims.
Claims
I/We claim: . A method of producing a biodegradable composite, characterised by the steps of:
grinding starch into fine particles;
grinding polyvinyl alcohol into fine particles;
blending the ground starch in arange of 0 - 60% by total weight and ground polyvinyl alcoholinarange of 30 - 80% by total weight.with addition ofadditives to form a mixture;
stabilizingthe mixture for a time period;
subjecting the mixture to continuous kneading process to form non-porous material;
extruding and cutting the non-porous material into pellet form; and stabilizing the pellet for a time period to produce processable biodegradable composite.
2. A method of producing a biodegradable composite according to claim 1 , wherein the biodegradable composite comprises 4-15% moisture content.
3. A method of producing a biodegradable composite according to claim 1 , wherein the starch is tapioca starch, corn starch, natural starch, or modified starch.
4. A method of producing a biodegradable compositeaccording to claim 1 , wherein the starch is ground to particle size of 25 - 40 microns.
5. A method of producing a biodegradable composite according to claim 1 , wherein the polyvinyl alcohol is ground to particle size of 75 - 150 microns.
A method of producing a biodegradable composite according to claim 1 , wherein the additivescomprise ofwater, urea, anti-blocking agent, organic
plasticizer, anti-freezing agent, buffer, amide compatibiliser, acrylic modifier, elastomer, and proprietary additives.
7. A method of producing a biodegradable composite according to claim 1 , wherein the ground starch and ground polyvinyl alcohol are blended with addition of additivesat temperature of 60-80°C.
8. A method of producing a biodegradable composite according to claim 1 , wherein the ground starch and ground polyvinyl alcohol are blended with addition of additivesfor 30 - 60minutes.
9. A method of producing a biodegradable composite according to claim 1 , wherein the blended mixture is cooled to a temperature of 40-50°Cbefore being stabilized.
10. A method of producing a biodegradable composite according to claim 1 , wherein the mixture is stabilizedfor a time period of 24-48 hours.
11. A method of producing a biodegradable composite according to claim 1 , wherein the continuous kneadingprocess comprises the steps of intensive mixing and compressing the mixture to form non-porous material.
12. A method of producing a biodegradable composite according to claim 1 , wherein the continuous kneadingprocess is performed at a temperature in a range of 60°C to 170°C.
13. A method of producing a biodegradable compositeaccording to claim 1 , wherein the continuous kneading process is performed under high pressurebetween 3000 - 15000kPato controlmoisture content of the mixture.
A method of producing a biodegradable composite according to claim 1 , wherein the pellet is stablizedfor a time period of minimum one day in atmospheric condition to obtain the biodegradable composite.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ID20134466 | 2013-10-25 | ||
| IDP00201304466 | 2013-10-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015059685A1 true WO2015059685A1 (en) | 2015-04-30 |
Family
ID=52992354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/ID2014/000008 WO2015059685A1 (en) | 2013-10-25 | 2014-08-21 | A method of producing biodegradable composite |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2015059685A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112759872A (en) * | 2021-01-25 | 2021-05-07 | 大千科技(天津)有限公司 | Formula and preparation process of novel degradable plastic |
| CN114591582A (en) * | 2022-03-18 | 2022-06-07 | 深圳市明星盛包装集团有限公司 | Photo-biodegradable plastic film and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5308879A (en) * | 1992-09-07 | 1994-05-03 | Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha | Process for preparing biodegradable resin foam |
| JPH11130907A (en) * | 1997-10-31 | 1999-05-18 | Yamaguchi Seisakusho:Kk | Biodegradable resin product, raw material therefor, and preparation thereof |
| JP2007262189A (en) * | 2006-03-28 | 2007-10-11 | Achilles Corp | Biodegradable film or sheet |
| WO2011145461A1 (en) * | 2010-05-18 | 2011-11-24 | 昭和電工株式会社 | Foamable resin composition and foam |
| CN102504345A (en) * | 2011-11-10 | 2012-06-20 | 宁夏绿环生物降解制品开发有限公司 | Disposable controlled completely-degradable plastic packing bag and preparation method thereof |
| CN103012856A (en) * | 2012-12-06 | 2013-04-03 | 湖南工业大学 | Microcrystalline cellulose and polyvinyl alcohol reinforced starch-based full-biodegradable blending material and preparation method thereof |
-
2014
- 2014-08-21 WO PCT/ID2014/000008 patent/WO2015059685A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5308879A (en) * | 1992-09-07 | 1994-05-03 | Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha | Process for preparing biodegradable resin foam |
| JPH11130907A (en) * | 1997-10-31 | 1999-05-18 | Yamaguchi Seisakusho:Kk | Biodegradable resin product, raw material therefor, and preparation thereof |
| JP2007262189A (en) * | 2006-03-28 | 2007-10-11 | Achilles Corp | Biodegradable film or sheet |
| WO2011145461A1 (en) * | 2010-05-18 | 2011-11-24 | 昭和電工株式会社 | Foamable resin composition and foam |
| CN102504345A (en) * | 2011-11-10 | 2012-06-20 | 宁夏绿环生物降解制品开发有限公司 | Disposable controlled completely-degradable plastic packing bag and preparation method thereof |
| CN103012856A (en) * | 2012-12-06 | 2013-04-03 | 湖南工业大学 | Microcrystalline cellulose and polyvinyl alcohol reinforced starch-based full-biodegradable blending material and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112759872A (en) * | 2021-01-25 | 2021-05-07 | 大千科技(天津)有限公司 | Formula and preparation process of novel degradable plastic |
| CN114591582A (en) * | 2022-03-18 | 2022-06-07 | 深圳市明星盛包装集团有限公司 | Photo-biodegradable plastic film and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8841362B2 (en) | Thermoplastic starch and synthetic polymer blends and method of making | |
| CN104861210B (en) | A kind of starch base full biodegradable resin of hydrophobic stabilization and preparation method thereof | |
| EP2467418B1 (en) | Process of producing thermoplastic starch/polymer blends | |
| CN108559232A (en) | A kind of starch plastics film and preparation method thereof that tearing-resistant performance is excellent | |
| CN108929527B (en) | PBAT/modified starch full-biodegradable film with high ductility and high barrier property as well as preparation method and application thereof | |
| EP3064542B1 (en) | Biodegradable thermoplastic polymer compostion, method for its manufacture and use thereof | |
| Munthoub et al. | Tensile and water absorption properties of biodegradable composites derived from cassava skin/polyvinyl alcohol with glycerol as plasticizer | |
| CN102686660A (en) | Starch-based biodegradable polymer, method for manufacturing the same, and product thereof | |
| Zanela et al. | Mixture design applied for the development of films based on starch, polyvinyl alcohol, and glycerol | |
| CN115584109B (en) | Composite material, preparation method and application thereof, and degradable mulching film | |
| CN112552655A (en) | Modified cellulose filled PBAT/PLA composition suitable for preparing film, and preparation and application thereof | |
| CN105694201A (en) | Biodegradable composite material | |
| CN104530607A (en) | Modified TPU/PVC alloy and preparation method thereof | |
| CA2778580A1 (en) | Expandable beads of a compostable or biobased thermoplastic polymer | |
| CN117887229B (en) | Biodegradable plastic | |
| WO2015059685A1 (en) | A method of producing biodegradable composite | |
| Yee et al. | Mechanical and water absorption properties of poly (vinyl alcohol)/sago pith waste biocomposites | |
| CN109181284A (en) | A kind of complete biodegradable high-barrier polyamide-based composite film material and preparation method thereof | |
| CN105461970A (en) | Biomass composite antibiotic foamed material | |
| KR102599541B1 (en) | Composition for mulching film with improved biodegradability in soil conditions after crop cultivation, manufacturing method thereof, and mulching film prepared therefrom | |
| CN111909496A (en) | Biodegradable plastic, production process and application thereof | |
| CN104974487A (en) | Preparation method of high-toughness polylactic acid-based composite material | |
| CN103923353B (en) | Starch base Dining tool and preparation method thereof | |
| CN113354850B (en) | Preparation method of cellulose/starch compound | |
| CN107722373A (en) | A kind of biodegradable plastic and preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14855619 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 14855619 Country of ref document: EP Kind code of ref document: A1 |