WO1992002559A1 - Starch treatment process - Google Patents

Starch treatment process Download PDF

Info

Publication number
WO1992002559A1
WO1992002559A1 PCT/GB1991/001297 GB9101297W WO9202559A1 WO 1992002559 A1 WO1992002559 A1 WO 1992002559A1 GB 9101297 W GB9101297 W GB 9101297W WO 9202559 A1 WO9202559 A1 WO 9202559A1
Authority
WO
WIPO (PCT)
Prior art keywords
starch
weight
water
composition
extruder
Prior art date
Application number
PCT/GB1991/001297
Other languages
French (fr)
Inventor
Karl-Heinz Bahr
Michael George Fitton
Helmut Koch
Original Assignee
Cerestar Holding B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10680292&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1992002559(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Cerestar Holding B.V. filed Critical Cerestar Holding B.V.
Priority to EP91914180A priority Critical patent/EP0495056B1/en
Priority to DE69115673T priority patent/DE69115673T2/en
Publication of WO1992002559A1 publication Critical patent/WO1992002559A1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B30/00—Preparation of starch, degraded or non-chemically modified starch, amylose, or amylopectin
    • C08B30/12—Degraded, destructured or non-chemically modified starch, e.g. mechanically, enzymatically or by irradiation; Bleaching of starch
    • 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
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • 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
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films

Definitions

  • the present invention relates to a process for treating starch by extrusion or injection moulding and, in particular to a process for producing thermoplastic starch products by extrusion.
  • EP 118240 includes (a) maintaining a composition comprising a starch and water at a water content in the range of from 5 to 30% by weight based on the weight of the composition and heating the composition at elevated pressure to form a melt (b) further heating and plasticising the melt into a molecularly dispersed form (c) injecting the piasticised melt into a mould while maintaining the water content in the 5- 30% by weight range (d) cooling down the mould and (e) ejecting the moulded article.
  • This process is suitably carried out in injection moulding equipment.
  • the starch used in the process of EP 118240 may be chosen from a wide range of commercially available starches eg. maize, wheat, potato, rice or tapioca starch, the only proviso being that the starch is not chemically modified.
  • the thermomechanical properties of the product of the process are said to be strongly dependent on its water content, the lower limit being defined by a maximum processing temperature of 240°C, which cannot be exceeded if degradation of the starch is to be avoided.
  • the upper limit is determined by the stickiness and distortion of the finished products.
  • the invention is applicable to a process in which a starch-containing composition is extruded to produce pellets for subsequent processing as a thermoplastic eg. by injection moulding, compression moulding or film extrusion or to a process in which the starch-containing composition is processed in an injection moulding machine followed by direct injection into a mould.
  • a process for extruding or injection moulding a starch-containing composition by feeding the composition either to an extruder which extrudes the composition through a die or to an injection moulding machine which injects the composition into a mould is characterised in that a substantially transparent product is produced by providing that,
  • the starch which is used contains less than 8% by weight water based on the starch
  • the water content of the starch in the barrel of the extruder or the injection moulding machine is controlled so as to be in the range 5 to 20% preferably 7 to 15% by weight of the starch and
  • ( c ) water is removed from the composition immediately before the composition leaves the barrel of the extruder or the injection moulding machine so that the water content of the composition passing through the die and/or entering the mould is less than 3% by weight of the starch.
  • the starch which is fed to the extruder contains less than 5 weight % water and suitably contains 2 to 3 weight % water.
  • Starch containing this amount of water is made commercially by the mechanical drying of starch in an explosion proof dryer and the product conventionally finds use in blends with polyethylene.
  • the water content of the starch in the extruder barrel may be achieved by adding water if necessary. Water may be added to the starch immediately before the starch is fed to the extruder or water may be fed directly to the extruder itself. It is important that the water is not added to the starch too soon before the latter is introduced to the extruder otherwise the beneficial effects of using super dry starch are lost. For this reason it is preferable to add any water directly to the extruder barrel. Although water may be added to give a composition containing more than 20% by weight water based on starch this is unnecessary and only results in more water to be removed in stage (c) of the process.
  • the water is preferably removed from the starch immediately before it leaves the extruder by means of a vacuum applied to an exit port located at the end of the extruder barrel.
  • the water content of the starch as it leaves the extruder is preferably less than 1% by weight of starch.
  • the starch which is used in the process of the present invention may be chosen from any of the available starches although it is preferred that the amylose content be low since we have observed that the opacity of the product increases with increasing amylose content of the starch.
  • Regular maize starch approximately 25 % amylose is a very suitable feedstock for the process.
  • the temperature maintained in the extruder may be in the range 100 to 220°C but as a minimum degradation of the starch is desirable it is preferred that the temperature be in the range 130-150°C.
  • the starch which is extruded in accordance with the present invention may include other substances depending upon the purpose for which the extruded product is required. It is generally preferred to provide a plasticiser for the starch eg. a polyethylene glycrjl, glycerol, sorbitol, erythritol, propylene glycol, pentaerythritol, or a glycerol ester. A lubricant such as a lipid or a metal stearate may also be present.
  • the plasticiser is usually used in an amount 0.1 to 50% preferably 5 to 30 % by weight based on the starch and the lubricant 0.01 to 10 % by weight based on the starch.
  • Other possible additives include flow improvers, antistatic agents and stabilisers.
  • the extruder used was provided with a feed inlet hopper for the starch, an inlet into the extruder for water adjacent to the starch inlet, an exit die to extrude product in the shape of a rod and a port immediately adjacent to the exit die to which a vacuum could be applied.
  • the starch fed to the extruder contained 2.6 % by weight water based on starch and 30% by weight glycerol based on starch. Water was added to the extruder so that the amount of water in the mixture in the extruder barrel was 10 % by weight based on starch. A vacuum was applied to the port adjacent to the exit die and water removed from the mixture so that the product leaving the extruder die contained 0.8% by weight water based on starch.
  • the extruded product was a hard, brittle, transparent rod which was thermoplastic. When the super dry starch was used without the addition of water to the extruder the extruder rapidly seized and was found to be choked with an ungelatinised white powder. When normal starch containing about 12% by weight water was used as the feedstock, the extruded product was opaque.

Abstract

In a process for extruding or injection moulding starch-containing composition, a substantially transparent product is produced by providing that the starch used contains less than 8 % by weight of water, that the water content of the starch in the barrel of the extruder or injection moulding machine is controlled so as to be within the range of from 5 to 20 % by weight (based on the weight of the starch) and that water is removed from the composition immediately before the composition leaves the barrel of the extruder or the injection moulding machine so that the water content of the composition passing through the die and/or entering the mould is less than 3 % by weight of the starch.

Description

Starch Treatment Process
The present invention relates to a process for treating starch by extrusion or injection moulding and, in particular to a process for producing thermoplastic starch products by extrusion.
The processing of starch in an extruder has been known for many years and there are articles in the literature describing various aspects of the process eg. Cereal Chemistry 54(3):436-443. In the extruder the starch is subjected to a shearing effect at an elevated temperature resulting in gelatinisation of the starch granules and some degradation of the starch molecules.
Recently, descriptions have appeared in the literature eg. in European patent 118240 of a process for the injection moulding of starch in which the starch is injected into a mould to produce a shaped starch article. The process described in EP 118240 includes (a) maintaining a composition comprising a starch and water at a water content in the range of from 5 to 30% by weight based on the weight of the composition and heating the composition at elevated pressure to form a melt (b) further heating and plasticising the melt into a molecularly dispersed form (c) injecting the piasticised melt into a mould while maintaining the water content in the 5- 30% by weight range (d) cooling down the mould and (e) ejecting the moulded article. This process is suitably carried out in injection moulding equipment.
The starch used in the process of EP 118240 may be chosen from a wide range of commercially available starches eg. maize, wheat, potato, rice or tapioca starch, the only proviso being that the starch is not chemically modified. The thermomechanical properties of the product of the process are said to be strongly dependent on its water content, the lower limit being defined by a maximum processing temperature of 240°C, which cannot be exceeded if degradation of the starch is to be avoided. The upper limit is determined by the stickiness and distortion of the finished products. Since natural starches generally contain an equilibrium amount of water of about 12% to 20% by weight the use of an untreated starch may fall, depending upon the quantity of substances other than starch in the composition, within the range specified in EP 118240 of 5 to 30% without the need to add more water. We have now found however that a product of improved clarity is obtained if the starting material for the process is a so-called super-dry starch containing less than 8% by weight water and particularly less than 5% by weight. The production of a clear product is especially important for film production.
The invention is applicable to a process in which a starch-containing composition is extruded to produce pellets for subsequent processing as a thermoplastic eg. by injection moulding, compression moulding or film extrusion or to a process in which the starch-containing composition is processed in an injection moulding machine followed by direct injection into a mould.
According to the present invention therefore a process for extruding or injection moulding a starch-containing composition by feeding the composition either to an extruder which extrudes the composition through a die or to an injection moulding machine which injects the composition into a mould is characterised in that a substantially transparent product is produced by providing that,
( a ) the starch which is used contains less than 8% by weight water based on the starch,
( b ) the water content of the starch in the barrel of the extruder or the injection moulding machine is controlled so as to be in the range 5 to 20% preferably 7 to 15% by weight of the starch and
( c ) water is removed from the composition immediately before the composition leaves the barrel of the extruder or the injection moulding machine so that the water content of the composition passing through the die and/or entering the mould is less than 3% by weight of the starch.
For the sake of convenience, the invention will be described in the remainder of this specification by referring to an extruder although it should be understood that this description applies equally as well to an injection moulding machine. Preferably, the starch which is fed to the extruder contains less than 5 weight % water and suitably contains 2 to 3 weight % water. Starch containing this amount of water is made commercially by the mechanical drying of starch in an explosion proof dryer and the product conventionally finds use in blends with polyethylene.
The water content of the starch in the extruder barrel may be achieved by adding water if necessary. Water may be added to the starch immediately before the starch is fed to the extruder or water may be fed directly to the extruder itself. It is important that the water is not added to the starch too soon before the latter is introduced to the extruder otherwise the beneficial effects of using super dry starch are lost. For this reason it is preferable to add any water directly to the extruder barrel. Although water may be added to give a composition containing more than 20% by weight water based on starch this is unnecessary and only results in more water to be removed in stage (c) of the process.
The water is preferably removed from the starch immediately before it leaves the extruder by means of a vacuum applied to an exit port located at the end of the extruder barrel. The water content of the starch as it leaves the extruder is preferably less than 1% by weight of starch.
The starch which is used in the process of the present invention may be chosen from any of the available starches although it is preferred that the amylose content be low since we have observed that the opacity of the product increases with increasing amylose content of the starch. Regular maize starch ( approximately 25 % amylose) is a very suitable feedstock for the process.
The temperature maintained in the extruder may be in the range 100 to 220°C but as a minimum degradation of the starch is desirable it is preferred that the temperature be in the range 130-150°C.
The starch which is extruded in accordance with the present invention may include other substances depending upon the purpose for which the extruded product is required. It is generally preferred to provide a plasticiser for the starch eg. a polyethylene glycrjl, glycerol, sorbitol, erythritol, propylene glycol, pentaerythritol, or a glycerol ester. A lubricant such as a lipid or a metal stearate may also be present. The plasticiser is usually used in an amount 0.1 to 50% preferably 5 to 30 % by weight based on the starch and the lubricant 0.01 to 10 % by weight based on the starch. Other possible additives include flow improvers, antistatic agents and stabilisers.
The invention will now be illustrated by reference to the following Example.
Example
The extruder used was provided with a feed inlet hopper for the starch, an inlet into the extruder for water adjacent to the starch inlet, an exit die to extrude product in the shape of a rod and a port immediately adjacent to the exit die to which a vacuum could be applied.
The starch fed to the extruder contained 2.6 % by weight water based on starch and 30% by weight glycerol based on starch. Water was added to the extruder so that the amount of water in the mixture in the extruder barrel was 10 % by weight based on starch. A vacuum was applied to the port adjacent to the exit die and water removed from the mixture so that the product leaving the extruder die contained 0.8% by weight water based on starch. The extruded product was a hard, brittle, transparent rod which was thermoplastic. When the super dry starch was used without the addition of water to the extruder the extruder rapidly seized and was found to be choked with an ungelatinised white powder. When normal starch containing about 12% by weight water was used as the feedstock, the extruded product was opaque.
The process described above was repeated successfully using smooth pea starch (34 % amylose) and high amylose maize starch ( 50 % amylose). The product produced from high amylose pea starch (74 % amylose) however although transparent was found to contain white particles of ungelled starch.
Satisfactory extruded products were also produced when the glycerol was replaced by equivalent amounts of erythritol, sorbitol, 1 ,4-butane diol and pentaerythritol respectively.

Claims

Claims
1 . A process for extruding or injection moulding a starch-containing composition comprising feeding the composition either to an extruder which extrudes the composition through a die or to an injection moulding machine which injects the composition into a mould is characterised in that a substantially transparent product is produced by providing that
( a ) the starch which is used contains less than 8% by weight water based on the starch,
( b ) the water content of the starch in the barrel of the extruder or the injection moulding machine is controlled so as to be in the range 5 to 20% by weight of the starch and,
( c ) water is removed from the composition immediately before the composition leaves the barrel of the extruder or the injection moulding machine so that the water content of the composition passing through the die and/or entering the mould is less than 3% by weight of the starch.
2. A process according to claim 1 characterised in that the starch which is used in step (a) contains less than 5 % by weight water based on the starch, preferably between 2 and 3 % by weight water.
3. A process according to claim 1 or claim 2 characterised in that the water content in step (b) is in the range 7 to 15% by weight of the starch.
4. A process according to any one of the preceding claims characterised in that water is controlled in step (b) by feeding water directly to the extruder or the injection moulding machine.
5. A process according to any one of the preceding claims characterised in that the water content of the composition leaving the barrel of the extruder or the injection moulding machine in step (c) is less than 1% by weight of the starch.
6. A process according to any one of the preceding claims characterised in that a plasticiser for the starch is present.
7. A process according to claim 6 characterised in that the plasticiser is a polyethylene glycol, glycerol, sorbitol, erythritol, propylene glycol, pentaerythritol or a glycerol ester.
8. A process according to claim 6 or claim 7 characterised in that the amount of plasticiser is 0.1 to 50% by weight of the starch.
9. A process according to any one of the preceding claims characterised in that a lubricant such as a lipid or metal stearate is present.
1 0. A process according to claim 9 characterised in that the amount of lubricant is 0.01 to 10 % by weight of the starch.
PCT/GB1991/001297 1990-08-07 1991-07-31 Starch treatment process WO1992002559A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP91914180A EP0495056B1 (en) 1990-08-07 1991-07-31 Starch treatment process
DE69115673T DE69115673T2 (en) 1990-08-07 1991-07-31 METHOD FOR TREATING STARCH

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB909017300A GB9017300D0 (en) 1990-08-07 1990-08-07 Starch treatment process
GB9017300.6 1990-08-07

Publications (1)

Publication Number Publication Date
WO1992002559A1 true WO1992002559A1 (en) 1992-02-20

Family

ID=10680292

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1991/001297 WO1992002559A1 (en) 1990-08-07 1991-07-31 Starch treatment process

Country Status (9)

Country Link
US (1) US5275774A (en)
EP (1) EP0495056B1 (en)
JP (1) JP3280666B2 (en)
AT (1) ATE131831T1 (en)
DE (1) DE69115673T2 (en)
DK (1) DK0495056T3 (en)
ES (1) ES2080958T3 (en)
GB (1) GB9017300D0 (en)
WO (1) WO1992002559A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0516030A2 (en) * 1991-05-29 1992-12-02 Ems-Inventa Ag Process and apparatus for the preparation of melts of starch and the products obtained by this process
EP0541050A2 (en) * 1991-11-07 1993-05-12 Ems-Inventa Ag Starch fibres, process for their preparation and their use
WO1996019599A1 (en) * 1994-12-22 1996-06-27 Biotec Biologische Naturverpackungen Gmbh Technical and non-technical textile products and packaging materials
WO2006042364A1 (en) * 2004-10-18 2006-04-27 Plantic Technologies Ltd Barrier film

Families Citing this family (59)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5660903A (en) 1992-08-11 1997-08-26 E. Khashoggi Industries Sheets having a highly inorganically filled organic polymer matrix
US5580624A (en) 1992-08-11 1996-12-03 E. Khashoggi Industries Food and beverage containers made from inorganic aggregates and polysaccharide, protein, or synthetic organic binders, and the methods of manufacturing such containers
US5679145A (en) 1992-08-11 1997-10-21 E. Khashoggi Industries Starch-based compositions having uniformly dispersed fibers used to manufacture high strength articles having a fiber-reinforced, starch-bound cellular matrix
US5800647A (en) 1992-08-11 1998-09-01 E. Khashoggi Industries, Llc Methods for manufacturing articles from sheets having a highly inorganically filled organic polymer matrix
US5582670A (en) 1992-08-11 1996-12-10 E. Khashoggi Industries Methods for the manufacture of sheets having a highly inorganically filled organic polymer matrix
US5830548A (en) 1992-08-11 1998-11-03 E. Khashoggi Industries, Llc Articles of manufacture and methods for manufacturing laminate structures including inorganically filled sheets
US5506046A (en) 1992-08-11 1996-04-09 E. Khashoggi Industries Articles of manufacture fashioned from sheets having a highly inorganically filled organic polymer matrix
US5830305A (en) 1992-08-11 1998-11-03 E. Khashoggi Industries, Llc Methods of molding articles having an inorganically filled organic polymer matrix
US5810961A (en) 1993-11-19 1998-09-22 E. Khashoggi Industries, Llc Methods for manufacturing molded sheets having a high starch content
US5662731A (en) 1992-08-11 1997-09-02 E. Khashoggi Industries Compositions for manufacturing fiber-reinforced, starch-bound articles having a foamed cellular matrix
US5618341A (en) 1992-08-11 1997-04-08 E. Khashoggi Industries Methods for uniformly dispersing fibers within starch-based compositions
US5545450A (en) 1992-08-11 1996-08-13 E. Khashoggi Industries Molded articles having an inorganically filled organic polymer matrix
US5928741A (en) 1992-08-11 1999-07-27 E. Khashoggi Industries, Llc Laminated articles of manufacture fashioned from sheets having a highly inorganically filled organic polymer matrix
US5783126A (en) 1992-08-11 1998-07-21 E. Khashoggi Industries Method for manufacturing articles having inorganically filled, starch-bound cellular matrix
US5709827A (en) 1992-08-11 1998-01-20 E. Khashoggi Industries Methods for manufacturing articles having a starch-bound cellular matrix
US5851634A (en) 1992-08-11 1998-12-22 E. Khashoggi Industries Hinges for highly inorganically filled composite materials
US5683772A (en) 1992-08-11 1997-11-04 E. Khashoggi Industries Articles having a starch-bound cellular matrix reinforced with uniformly dispersed fibers
US5508072A (en) 1992-08-11 1996-04-16 E. Khashoggi Industries Sheets having a highly inorganically filled organic polymer matrix
US5658603A (en) 1992-08-11 1997-08-19 E. Khashoggi Industries Systems for molding articles having an inorganically filled organic polymer matrix
DE4228016C1 (en) * 1992-08-24 1994-03-31 Biotec Biolog Naturverpack Process for producing biodegradable films from vegetable raw materials
US5844023A (en) 1992-11-06 1998-12-01 Bio-Tec Biologische Naturverpackungen Gmbh Biologically degradable polymer mixture
GB9224557D0 (en) * 1992-11-24 1993-01-13 Cerestar Holding Bv Starch based material
US5716675A (en) 1992-11-25 1998-02-10 E. Khashoggi Industries Methods for treating the surface of starch-based articles with glycerin
DK169728B1 (en) 1993-02-02 1995-01-23 Stein Gaasland Process for releasing cellulose-based fibers from each other in water and molding for plastic molding of cellulosic fiber products
US5738921A (en) 1993-08-10 1998-04-14 E. Khashoggi Industries, Llc Compositions and methods for manufacturing sealable, liquid-tight containers comprising an inorganically filled matrix
US5736209A (en) 1993-11-19 1998-04-07 E. Kashoggi, Industries, Llc Compositions having a high ungelatinized starch content and sheets molded therefrom
US6083586A (en) 1993-11-19 2000-07-04 E. Khashoggi Industries, Llc Sheets having a starch-based binding matrix
US5705203A (en) 1994-02-07 1998-01-06 E. Khashoggi Industries Systems for molding articles which include a hinged starch-bound cellular matrix
US5843544A (en) 1994-02-07 1998-12-01 E. Khashoggi Industries Articles which include a hinged starch-bound cellular matrix
US5776388A (en) 1994-02-07 1998-07-07 E. Khashoggi Industries, Llc Methods for molding articles which include a hinged starch-bound cellular matrix
US5403875A (en) * 1994-05-12 1995-04-04 Rohm And Haas Company Melt-processed polymer blends
ATE242295T1 (en) 1995-04-07 2003-06-15 Biotec Biolog Naturverpack BIODEGRADABLE POLYMER BLEND
US5609817A (en) * 1995-06-06 1997-03-11 The United States Of America As Represented By The Secretary Of Agriculture Extrusion-blown films from graft polymers prepared from cereal flour
US5766366A (en) * 1995-10-13 1998-06-16 A. E. Staley Manufacturing Co. Dry thinned starches, process for producing dry thinned starches, and products and compositions thereof
US6001408A (en) * 1995-10-13 1999-12-14 Corn Products International, Inc. Starch products having hot or cold water dispersibility and hot or cold swelling viscosity
US6168857B1 (en) 1996-04-09 2001-01-02 E. Khashoggi Industries, Llc Compositions and methods for manufacturing starch-based compositions
DE19624641A1 (en) 1996-06-20 1998-01-08 Biotec Biolog Naturverpack Biodegradable material consisting essentially of or based on thermoplastic starch
KR100451527B1 (en) * 1999-01-25 2004-10-08 에코신테틱스 인코포레이티드 Biopolymer nanoparticles
NZ503231A (en) 1999-03-08 2001-09-28 Humatro Corp Absorbent, flexible structure comprising pseudo-thermoplastic starch fibers, plasticizer (such as sorbitol, PVA)
NL1012919C2 (en) * 1999-08-26 2001-07-10 Geldrop Mode B V H O D N Groen Production of biodegradable materials by processing plant-based materials, especially starch, comprises using sorbitol in the processing step
US6231970B1 (en) 2000-01-11 2001-05-15 E. Khashoggi Industries, Llc Thermoplastic starch compositions incorporating a particulate filler component
US20030203196A1 (en) * 2000-11-27 2003-10-30 Trokhan Paul Dennis Flexible structure comprising starch filaments
US7029620B2 (en) 2000-11-27 2006-04-18 The Procter & Gamble Company Electro-spinning process for making starch filaments for flexible structure
US6811740B2 (en) 2000-11-27 2004-11-02 The Procter & Gamble Company Process for making non-thermoplastic starch fibers
US7276201B2 (en) * 2001-09-06 2007-10-02 The Procter & Gamble Company Process for making non-thermoplastic starch fibers
US6723160B2 (en) * 2002-02-01 2004-04-20 The Procter & Gamble Company Non-thermoplastic starch fibers and starch composition for making same
US20070014905A1 (en) * 2003-06-30 2007-01-18 Purdue Research Foundation Starchy material processed to produce one or more products comprising starch, ethanol, sugar syrup, oil, protein, fiber, gluten meal, and mixtures thereof
US20050106300A1 (en) * 2003-06-30 2005-05-19 Purdue Research Foundation Method for producing a material having an increased solubility in alcohol
US6955850B1 (en) 2004-04-29 2005-10-18 The Procter & Gamble Company Polymeric structures and method for making same
US6977116B2 (en) * 2004-04-29 2005-12-20 The Procter & Gamble Company Polymeric structures and method for making same
GB0410388D0 (en) * 2004-05-11 2004-06-16 Adept Polymers Ltd An extrusion process
US20090160095A1 (en) * 2004-11-19 2009-06-25 Board Of Trustees Of Michigan State University Biodegradable thermoplasticized starch-polyester reactive blends for thermoforming applications
US7629405B2 (en) * 2004-11-19 2009-12-08 Board Of Trustees Of Michigan State University Starch-polyester biodegradable graft copolyers and a method of preparation thereof
US7989524B2 (en) * 2005-07-19 2011-08-02 The United States Of America, As Represented By The Secretary Of Agriculture Fiber-reinforced starch-based compositions and methods of manufacture and use
US20070021515A1 (en) * 2005-07-19 2007-01-25 United States (as represented by the Secretary of Agriculture) Expandable starch-based beads and method of manufacturing molded articles therefrom
WO2008105663A1 (en) 2007-03-01 2008-09-04 Bioneedle Technologies Group B.V. Implant containing destructurized starch
US8383134B2 (en) 2007-03-01 2013-02-26 Bioneedle Technologies Group B.V. Biodegradable material based on opened starch
JP2022052117A (en) 2020-09-23 2022-04-04 セイコーエプソン株式会社 Fiber structure and production apparatus of fiber structure
AU2022310072A1 (en) * 2021-07-12 2024-02-22 Yifan LIU Dry starch applied to field of biodegradable plastics and preparation method therefor and application thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE654605A (en) * 1961-12-16 1965-04-20
GB1014801A (en) * 1960-12-22 1965-12-31 Res Ass Of British Flour Mille New products derived from starch
US3265509A (en) * 1963-11-13 1966-08-09 Nat Starch Chem Corp Manufacture of confectionery products by extrusion
US4454268A (en) * 1983-06-23 1984-06-12 The United States Of America As Represented By The Secretary Of Agriculture Starch-based semipermeable films
WO1990010671A1 (en) * 1989-03-09 1990-09-20 Butterfly S.R.L. Biodegradable articles based on starch and process for producing them
WO1990014938A1 (en) * 1989-06-01 1990-12-13 Goodman Fielder Wattie Australia Limited Starch derived shaped articles

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL263573A (en) * 1960-04-13 1900-01-01
DE1303005B (en) * 1961-04-03 1971-06-24
US3243308A (en) * 1963-10-23 1966-03-29 Dept Of Agriculture And Inspec Amylosic films and method of making the same
CA941825A (en) * 1970-07-14 1974-02-12 Scholten-Honig Research N. V. Redispersible hydrophobic starch derivatives and process for their preparation
BG46154A3 (en) * 1983-02-18 1989-10-16 Warner Lambert Co Method for preparing of capsules
US4673438A (en) * 1984-02-13 1987-06-16 Warner-Lambert Company Polymer composition for injection molding
US5043196A (en) * 1989-05-17 1991-08-27 National Starch And Chemical Investment Holding Corporation Biodegradable shaped products and the method of preparation thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1014801A (en) * 1960-12-22 1965-12-31 Res Ass Of British Flour Mille New products derived from starch
BE654605A (en) * 1961-12-16 1965-04-20
US3265509A (en) * 1963-11-13 1966-08-09 Nat Starch Chem Corp Manufacture of confectionery products by extrusion
US4454268A (en) * 1983-06-23 1984-06-12 The United States Of America As Represented By The Secretary Of Agriculture Starch-based semipermeable films
WO1990010671A1 (en) * 1989-03-09 1990-09-20 Butterfly S.R.L. Biodegradable articles based on starch and process for producing them
WO1990014938A1 (en) * 1989-06-01 1990-12-13 Goodman Fielder Wattie Australia Limited Starch derived shaped articles

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHIMIA-REPORT vol. 41, no. 3, 1 March 1987, pages 76 - 81; R.P.T. STEPTO ET AL.: 'INJECTION MOULDING OF NATURAL HYDROPHILIC POLYMERS IN THE PRESENCE OF WATER' *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0516030A2 (en) * 1991-05-29 1992-12-02 Ems-Inventa Ag Process and apparatus for the preparation of melts of starch and the products obtained by this process
EP0516030A3 (en) * 1991-05-29 1993-03-24 Ems-Inventa Ag Process and apparatus for the preparation of melts of starch and the products obtained by this process
EP0541050A2 (en) * 1991-11-07 1993-05-12 Ems-Inventa Ag Starch fibres, process for their preparation and their use
EP0541050A3 (en) * 1991-11-07 1993-09-08 Ems-Inventa Ag Starch fibres, process for their preparation and their use
US5516815A (en) * 1991-11-07 1996-05-14 Ems-Inventa Ag Starch-Containing fibers, process for their production and products made therefrom
WO1996019599A1 (en) * 1994-12-22 1996-06-27 Biotec Biologische Naturverpackungen Gmbh Technical and non-technical textile products and packaging materials
AU700005B2 (en) * 1994-12-22 1998-12-17 Bio-Tec Biologische Naturverpackungen Gmbh & Co. Kg Technical and non-technical textile products and packaging materials
US6218321B1 (en) 1994-12-22 2001-04-17 Biotec Biologische Naturverpackungen Gmbh Biodegradable fibers manufactured from thermoplastic starch and textile products and other articles manufactured from such fibers
WO2006042364A1 (en) * 2004-10-18 2006-04-27 Plantic Technologies Ltd Barrier film

Also Published As

Publication number Publication date
ES2080958T3 (en) 1996-02-16
US5275774A (en) 1994-01-04
JPH05501686A (en) 1993-04-02
DE69115673T2 (en) 1996-05-02
JP3280666B2 (en) 2002-05-13
EP0495056B1 (en) 1995-12-20
ATE131831T1 (en) 1996-01-15
GB9017300D0 (en) 1990-09-19
EP0495056A1 (en) 1992-07-22
DE69115673D1 (en) 1996-02-01
DK0495056T3 (en) 1996-01-29

Similar Documents

Publication Publication Date Title
EP0495056B1 (en) Starch treatment process
US6136097A (en) Process for producing thermoplastic starch
US5525281A (en) Method for preparing biodegradable films from plant-based raw materials
JP3076797B2 (en) Modified starch composition for producing biodegradable plastic articles and method for producing the same
US5480923A (en) Thermoplastically processible composition of starch acrylate copolymers
US6730249B2 (en) Methods of making composites containing cellulosic pulp fibers
EP0537317B1 (en) Moisture-proof starch material for making cast films and thermoplastic materials
JPH0725940B2 (en) Polymer-based blend composition containing modified starch
JPH0374445A (en) Polymer-base blend composition containing modified starch
AU648704B2 (en) Method of extruding starch under low moisture conditions using feed starch having coarse particle size
EP0599535A1 (en) Starch based material
CN106800674A (en) Starch foaming product and preparation method thereof
CA2114286C (en) Starch-based material
US2774105A (en) Extraction-extrusion apparatus
US3223664A (en) Thermoplastic molding compositions
US5739244A (en) Polymer composition containing prime starch
US5523372A (en) Starch graft copolymer from prime starch
EP0942040B1 (en) A polymeric plastic film
Lai et al. Study and characterisation of the post processing ageing of sago pith waste biocomposites
US4752429A (en) Process of shaping thermoplastic material containing a carbohydrate additive
Mitrus Microstructure of thermoplastic starch polymers
GB799328A (en) A process of treating polyamides of low molecular weight so as to increase their average molecular weight and improve their physical and chemical properties
JPH11226986A (en) Manufacture of injection-molded article constituted of starchy biodegradable plastic
JPH09505613A (en) Thermoplastically processable composite material based on starch

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LU NL SE

WWE Wipo information: entry into national phase

Ref document number: 1991914180

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1991914180

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 1991914180

Country of ref document: EP