WO2005059014A1 - シート用生分解性発泡体及びその製造方法、並びに当該発泡体を用いた生分解性成形品及びその製造方法 - Google Patents
シート用生分解性発泡体及びその製造方法、並びに当該発泡体を用いた生分解性成形品及びその製造方法 Download PDFInfo
- Publication number
- WO2005059014A1 WO2005059014A1 PCT/JP2004/018782 JP2004018782W WO2005059014A1 WO 2005059014 A1 WO2005059014 A1 WO 2005059014A1 JP 2004018782 W JP2004018782 W JP 2004018782W WO 2005059014 A1 WO2005059014 A1 WO 2005059014A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- biodegradable
- foam
- sheet
- producing
- resin
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
-
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/125—Water, e.g. hydrated salts
-
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/22—After-treatment of expandable particles; Forming foamed products
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
- C08L3/02—Starch; Degradation products thereof, e.g. dextrin
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
-
- 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
- C08J2201/00—Foams characterised by the foaming process
- C08J2201/02—Foams characterised by the foaming process characterised by mechanical pre- or post-treatments
- C08J2201/03—Extrusion of the foamable blend
-
- 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
- C08J2303/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2303/02—Starch; Degradation products thereof, e.g. dextrin
Definitions
- the present invention relates to a biodegradable foam for a sheet and a method for producing the same, and a biodegradable molded article using the foam and a method for producing the same, and particularly to plant fibers such as rice husk powder and the like.
- the present invention relates to a biodegradable foam for a sheet using a biodegradable thermoplastic resin and having excellent biodegradability and moldability, a method for producing the same, and a biodegradable molded article using the foam and a method for producing the same.
- biodegradable molded products are being developed as environmentally friendly materials, such as polylactic acid, succinate polymers such as polyethylene succinate and polybutylene succinate, polycaprolactone, and polyhydroxy.
- succinate polymers such as polyethylene succinate and polybutylene succinate
- polycaprolactone polycaprolactone
- Polyhydroxyalkanoates such as propionate-polyhydroxybutyrate and polyhydroxyparylate, and copolyesters obtained by introducing an aromatic component into the main chain of an aliphatic polyester have been developed.
- alpha-starch is used as a main component for maintaining the shape of the foam, there is a drawback that when used in containers and the like, water resistance and heat resistance are poor.
- Patent Document 2 describes a foam using paper. Specifically, a paper component crushed finely with a thermoplastic resin or a plant material and water is described. A technique of heating and kneading to obtain a molded product foamed by the vapor pressure of water is disclosed.
- the thermoplastic resin include synthetic resins such as polyethylene, polypropylene, polyester, and polyvinyl alcohol, and biodegradable resins such as polybutylene succinate, polybutylene succinate adipate, and polylactic acid. Examples thereof include crushed tea leaves, fine wood flour, and starches.
- Patent Document 2 Japanese Patent Application Laid-Open No. 2000-273800
- Patent Document 2 does not use a surfactant or a foaming agent as in Patent Document 1, and thus ensures safety even when used in food containers and the like.
- the use of biodegradable resins and plant materials makes it possible to provide environmentally friendly foams.
- the illustrated foam is a plate-like foam with a thickness of 20 mm and a width of 100 mm, and it can be used as a cushioning material or as a heat insulator, but it is used to mold complicated shapes such as containers. Has the drawback that the use of the foam is limited. Moreover, since the material is a foam mainly composed of paper, there is a problem that heat resistance is poor.
- An object of the present invention is to solve the above-mentioned problems, to provide excellent biodegradability, moldability, and heat resistance, and to provide highly safe biodegradation for sheets when used in food packaging containers and the like.
- An object of the present invention is to provide a foam and a method for producing the same, and a biodegradable molded article using the foam and a method for producing the same. Means for solving the problem
- the invention according to claim 1 is a biodegradable foam obtained by mixing rice husk powder, starch, and a biodegradable thermoplastic resin and foaming the mixture.
- the invention according to claim 2 provides the biodegradable foam for a sheet according to claim 1.
- rice husk flour contains 5-40% by weight and starch contains 5-30% by weight.
- the invention according to claim 3 provides the biodegradable foam for a sheet according to claim 1 or 2, wherein the biodegradable thermoplastic resin comprises two or more resin components having different melting points. It is characterized by being a mixture.
- the invention according to claim 4 provides the biodegradable foam for a sheet according to claim 3.
- the invention according to claim 5 is a method for producing a biodegradable foam for a sheet according to any one of claims 1 to 4, wherein the rice husk powder, starch, biodegradable thermoplastic resin, and water are used. Are mixed and extruded to produce a biodegradable foam for a sheet.
- the invention according to claim 6 is a biodegradable molded product obtained by molding the biodegradable foam for a sheet according to any one of claims 1 to 4 into a sheet.
- the biodegradable foam for a sheet according to any one of claims 1 to 4 is formed into a sheet, and then reshaped to form a packaging container. It is a biodegradable molded product obtained by the above.
- the invention according to claim 8 provides the method for producing a biodegradable molded article according to claim 7, wherein the sheet is formed after the biodegradable foam for a sheet is formed into a sheet. It is further characterized by producing a packaging container by heating and pressurizing.
- the material constituting the foam is mainly composed of rice husk powder, starch, and a biodegradable thermoplastic resin, it is excellent in biodegradability and used for containers of foods and the like.
- the conventional high foaming ratio about 20-40 times
- rice husk powder the heat resistance of the foam can be improved, and the rice husks that are now being discarded in large quantities in Japan can be used effectively.
- a highly heat-resistant plant fiber containing silica such as rice husk is used.
- a foam having excellent properties of plant fibers such as providing a foam having excellent heat resistance.
- the heat resistance decreases, and when the content exceeds 40% by weight, the binding property between contained substances decreases, and the fragility increases.
- the amount of starch is less than 5% by weight, the amount of the biodegradable thermoplastic resin contained increases, and the cost of foams and molded products increases.
- the starch content exceeds 30% by weight, the moldability when reshaping the foam is reduced, and the heat resistance is also reduced.
- the biodegradable thermoplastic resin is a mixture of two or more resin components having different melting points, the temperature at which the foam is molded and the temperature at which the foam is remolded It is possible to ensure excellent moldability even when the temperature at the time of heating is different.
- foaming at a temperature higher than the boiling point of water can form a good-quality foam. Resins that retain viscosity are preferred.
- a mold or the like is generally used, so if pressure molding is performed at a high temperature, it is difficult to obtain a uniform molded body due to distortion of the mold and non-uniformity of temperature distribution. Therefore, it is preferable to mix a resin that can be dissolved even at a relatively low temperature.
- the biodegradable thermoplastic resin since the biodegradable thermoplastic resin has a higher extensibility in a resin having a low melting point than a resin having a high melting point, when the foam is re-molded by a mold or the like, Formability is improved.
- a foam which does not use a surfactant or a foaming agent can be provided by utilizing water vapor foaming. Even when the body is used for containers such as food, high safety can be ensured.
- the biodegradable foam for a sheet according to any one of claims 1 to 3 is a foam excellent in remoldability, and thus, by molding these, It is possible to obtain a biodegradable molded product utilizing the excellent properties such as the biodegradability and heat resistance of the foam.
- the biodegradable molded article is a sheet-shaped molded article, it can be used as an intermediate when producing molded articles of various shapes such as packaging containers. Moreover, it is possible to easily produce a molded product by using a heating press used for the production of a conventional molded product. Furthermore, by arranging a molding machine such as a roller immediately after the production of the foam, it is possible to easily form the sheet into a sheet using the residual heat of the foam.
- the foam according to the present invention has excellent properties such as biodegradability, heat resistance, moldability and safety.
- biodegradability heat resistance
- moldability safety
- the biodegradable foam for a sheet according to the present invention includes rice husk powder, starch and biodegradable thermoplastic. It is mainly composed of resin.
- the main component composition of the biodegradable foam for sheets is that rice husk flour contains 5-40% by weight and starch contains 5-30% by weight, and the rest consists of biodegradable thermoplastic resin.
- the content of rice husk is less than 5% by weight, starch and biodegradable thermoplastic resin increase, resulting in high costs and poor mechanical strength.
- the rice husk powder exceeds 40% by weight, the foamability is inferior and the elongation is also reduced, so that a complicated molded product cannot be formed. Further, there is a problem that chipping, cracking, and the like are apt to occur and vulnerability is increased.
- the starch content is 5% by weight or less, the amount of biodegradable thermoplastic resin increases, and the cost increases. Further, the binding power to the rice husk powder decreases, and the fragility increases.
- the starch content exceeds 30% by weight, the moldability in reshaping the foam is reduced, and the heat resistance and water resistance are inferior and the range of use of the foam is limited.
- Vegetable fiber such as rice hull powder not only contributes as a bulking agent for foams and molded articles, but also imparts various properties such as biodegradability, bactericidal property, and heat resistance of the plant fiber. Useful.
- wastes such as nut shells and pomace as useful resources.
- shells and shells of shells such as rice, wheat, buckwheat, and soybeans
- shells of fruits such as coffee and peanuts
- skins of fruits such as chestnuts, oranges, apples, and pears, and their pomace are available. It is.
- rice hulls containing silica that contribute to heat resistance are preferable to use as plant fibers.
- Starch has a function as a foaming material constituting a foam and a function as a bulking agent. It has a good binding property to plant fibers and also has a binder function to bind the plant fibers.
- starch examples include raw starch obtained from corn, wheat, rice, potato, and the like, starch having an adjusted arsenic degree, and the like.
- the biodegradable thermoplastic resin is used not only to increase the mechanical strength of the foam, but also to improve heat resistance ⁇ water resistance and to impart extensibility indispensable for moldability.
- Biodegradable thermoplastic resins include polylactic acid, polyethylene succinate and polybutylene.
- Succinate polymers such as succinate, polyproprolataton, polyhydroxypropionate ⁇ polyhydroxybutyrate, polyhydroxyalkanoates such as polyhydroxyparylate, and copolyesters in which aromatic components are introduced into the main chain of aliphatic polyesters. are available.
- the biodegradable thermoplastic resin used in the present invention has a high melting point characteristic of not less than 160 ° C, preferably not less than 170 ° C in order to improve the heat resistance of foams and molded articles. Resin to be used. However, high melting point resins are generally inferior in extensibility and thus poor in moldability. To improve this, use a resin with an elongation of 100% or more, preferably 500% or more. However, the melting point is desirably 90 ° C or higher, preferably 100 ° C or higher.
- the biodegradable foam for a sheet according to the present invention is used by mixing two or more different biodegradable thermoplastic resins having an appropriate melting point and extensibility.
- the mixing ratio of the high melting point resin and the low melting point but high elongation resin can be appropriately set in consideration of the heat resistance and moldability of the biodegradable molded product.
- the low melting point resin is desirably less than the total weight of the high melting point resin, preferably not more than half of the total weight, more preferably not more than one third.
- thermoplastic resin having vapor permeability is more preferable.
- the rice husk is dried and crushed by a ball mill or the like to an average particle size force of not more than Slmm, preferably not more than 500 zm. Although it is possible to use the case where the particle size is 1 mm or more, it is preferable to process the molded product into fine powder when the shape of the molded product is complicated.
- the crushed rice husk powder, starch, and biodegradable thermoplastic resin are put into an extruder, and water is further supplied for water vapor foaming.
- these materials are heated and mixed.
- the material is kneaded and the material is extruded from the die of the extruder.
- the material foams to form a biodegradable foam for the sheet.
- the expansion ratio of the biodegradable foam for a sheet is within 15 times, preferably within 10 times.
- the foam itself cannot be formed into a uniform density and thickness when the foam, which generally has a higher material density in the portion closer to the outer shell than the inner material density, cannot be formed, and the force of the foam increases. Since air exists inside the body, when the foam is compressed, the air inside the body is not sufficiently released to the outside, and the foam tends to be a foamed molded article.
- the expansion ratio can be controlled by adjusting the amount of water mixed into the extruder, and a surfactant such as ammonium lauryl sulfate is used. Therefore, it is possible to produce a biodegradable foam for a sheet that has high safety and can be used for food containers and the like.
- chemicals that are safe for food hygiene can be used as needed.For example, sodium bicarbonate can be used as a foaming agent. it can.
- the biodegradable foam for a sheet according to the present invention is a foam having excellent remolding properties, by further processing these, the foam has excellent properties such as biodegradability and heat resistance. A viable biodegradable molded article can be obtained.
- Molded products can be used for various types of disposable molded products, such as food packaging containers and molded products such as plastic and paper for vehicles and electrical products.
- a sheet-like molded product obtained by heating and pressing the foam into a sheet shape can be used as an intermediate when the sheet is re-formed and molded into a container for packaging, etc., and a useful molded product is provided. It becomes possible to do.
- a method for producing a molded product using the biodegradable foam for a sheet will be described. It is possible to process the biodegradable foam for sheet of the present invention into chips, put it in a mold and heat and press it, but it is necessary to control so that the foam is uniformly dispersed in the molded product. Therefore, a sheet-like molded product is formed by first heating and pressing the foam. Next, a molded product such as a packaging container is manufactured by press-molding the sheet with a heated mold.
- the foam is cut into a predetermined length, and a plurality of the foams are collected and heated.
- a method of fusing a plurality of foams with a pressure roller and forming them into a sheet of a shape, extruding a biodegradable foam from an extruder, introducing a plurality of foams into a pressure roller, Molding is also possible. In the latter case, the pressure roller can be heated if necessary.
- the shape of the foam is not limited to a columnar one, and a rectangular parallelepiped plate-like foam may be formed, and then formed into a sheet by the above-described pressure roller.
- the sheet When obtaining a molded product such as a packaging container from a sheet-shaped molded product, the sheet is introduced into a heating press machine, and heated and pressed by a desired mold to easily form the molded product. Is obtained. Furthermore, it is also possible to perform a punching process at the time of press-molding with a mold and to extract a molded product such as a packaging container from the sheet.
- heating press machine it is possible to use a heating press machine used when manufacturing a molded article from a conventional synthetic resin sheet. It is possible to do.
- a plurality of biodegradable foams for a sheet are conveyed side by side, and are pressed by a pressure roller (manufactured by Yoshimura Kikai Co., Ltd., roller gap 35 mm) to a sheet having a width of 20 cm and a length of 30 cm. Molded into a shape.
- the sheet-shaped molded body was heated and pressed at 120 200 ° C by a heating press machine (manufactured by Yoshimura Kikai Co., Ltd.) to form a container having a width of 9 cm, a length of 15 cm, and a depth of 1.5 cm, A molded article of Example 1 was obtained.
- Example 2 By using the same material and the same manufacturing method as in Example 1 described above, by changing the weight percent of water to be added within the range of 10 to 15 weight percent, and adjusting the pressure in the extruder, the expansion ratio becomes 10%.
- the foams were formed and molded into Example 2 (expansion ratio 10 ⁇ ), Example 3 (15 ⁇ ), and Comparative Example (20 ⁇ ). A molded article of the container was obtained.
- the molded containers were put into a steamer, taken out after 30 minutes, and visually observed for changes from the original molded article shape as follows. It was evaluated on a three-point scale.
- Table 1 shows the results of evaluation of the above-described sheet formability, fusing property, three-dimensional formation, and heat resistance “test on water resistance” with respect to the above Examples 15 and Comparative Examples.
- Example 5 In the case of corn starch containing 30% by weight (Example 5), cracks are seen in some parts in three-dimensional molding, and in the heat resistance / water resistance test, the shape of a part of the container changes. It was understood that sufficient heat resistance and water resistance were not obtained.
- the sheet-like molded body was formed from the columnar biodegradable foam.
- the shape of the die of the extruder was changed to form a rectangular parallelepiped foam, and the above-described sheet-like foam was formed.
- the biodegradable foam for a sheet according to the present invention is not limited to a foam composed of rice hull powder, starch, and a biodegradable thermoplastic resin as described above.
- Various additives such as coloring agents such as silicon and antibacterial agents can be added to form multifunctional molded products.
- biodegradability for sheets is excellent in biodegradability, moldability, and heat resistance, and even when used in food packaging containers and the like. It is possible to provide a porous foam, a method for producing the same, a biodegradable molded article using the foam, and a method for producing the same.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/583,189 US20070254970A1 (en) | 2003-12-19 | 2004-12-16 | Biodegradable Foam for Sheet, Process for Producing the Same, Biodegradable Molding from the Foam and Process for Producing the Same |
EP04807141A EP1702946A1 (en) | 2003-12-19 | 2004-12-16 | Biodegradable foam for sheet, process for producing the same, biodegradable molding from the foam and process for producing the same |
CA002549924A CA2549924A1 (en) | 2003-12-19 | 2004-12-16 | Biodegradable foam for sheet, process for producing the same, biodegradable molding from the foam and process for producing the same |
AU2004298570A AU2004298570A1 (en) | 2003-12-19 | 2004-12-16 | Biodegradable foam for sheet, process for producing the same, biodegradable molding from the foam and process for producing the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-422501 | 2003-12-19 | ||
JP2003422501A JP3631743B1 (ja) | 2003-12-19 | 2003-12-19 | シート用生分解性発泡体及びその製造方法、並びに当該発泡体を用いた生分解性成形品及びその製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005059014A1 true WO2005059014A1 (ja) | 2005-06-30 |
Family
ID=34420267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/018782 WO2005059014A1 (ja) | 2003-12-19 | 2004-12-16 | シート用生分解性発泡体及びその製造方法、並びに当該発泡体を用いた生分解性成形品及びその製造方法 |
Country Status (8)
Country | Link |
---|---|
US (1) | US20070254970A1 (ja) |
EP (1) | EP1702946A1 (ja) |
JP (1) | JP3631743B1 (ja) |
KR (1) | KR20060109944A (ja) |
CN (2) | CN101104707B (ja) |
AU (1) | AU2004298570A1 (ja) |
CA (1) | CA2549924A1 (ja) |
WO (1) | WO2005059014A1 (ja) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8382888B2 (en) | 2003-08-27 | 2013-02-26 | Biosphere Industries, Llc | Composition for use in edible biodegradable articles and method of use |
BRPI0502338A2 (pt) * | 2005-06-16 | 2014-11-25 | Cbpak Tecnologia S A Produtos Eco Sustentaveis | Formulação para produção de espumas de amido resistentes à água e a ciclos de resfriamento congelamento e descongelamento |
TWI496725B (zh) | 2009-01-20 | 2015-08-21 | Chamness Biodegradables Llc | 多層次容器 |
KR101286485B1 (ko) * | 2013-02-25 | 2013-07-16 | 주식회사 웰데코 | 다기능 무늬시트의 제조방법 |
TWI494323B (zh) | 2013-08-30 | 2015-08-01 | Ind Tech Res Inst | 改質澱粉組成物、澱粉複合發泡材料及其製備方法 |
KR20150125052A (ko) * | 2014-04-29 | 2015-11-09 | (주)엘지하우시스 | 식품 포장용 발포 트레이 및 이의 제조방법 |
US10400105B2 (en) | 2015-06-19 | 2019-09-03 | The Research Foundation For The State University Of New York | Extruded starch-lignin foams |
CN110861381B (zh) * | 2019-11-21 | 2022-01-11 | 上海海洋大学 | 一种抑菌、防震、吸潮的可降解食品保鲜垫及其制备方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001009949A (ja) * | 1999-07-02 | 2001-01-16 | Nippo Kk | 発泡体シートおよびこれを用いた保冷容器 |
JP2001299121A (ja) * | 2000-04-26 | 2001-10-30 | Shimadzu Corp | 生分解性を有する高分子材料からなる敷き藁代替品 |
JP2001302835A (ja) * | 2000-04-26 | 2001-10-31 | Shimadzu Corp | 生分解性発泡体及びその製造方法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2729936B2 (ja) * | 1995-09-14 | 1998-03-18 | 株式会社大光 | 複合樹脂発泡体の製造方法 |
-
2003
- 2003-12-19 JP JP2003422501A patent/JP3631743B1/ja not_active Expired - Fee Related
-
2004
- 2004-12-16 EP EP04807141A patent/EP1702946A1/en not_active Withdrawn
- 2004-12-16 CN CN2007101360362A patent/CN101104707B/zh not_active Expired - Fee Related
- 2004-12-16 CN CNB2004800378683A patent/CN100445324C/zh not_active Expired - Fee Related
- 2004-12-16 US US10/583,189 patent/US20070254970A1/en not_active Abandoned
- 2004-12-16 CA CA002549924A patent/CA2549924A1/en not_active Abandoned
- 2004-12-16 AU AU2004298570A patent/AU2004298570A1/en not_active Abandoned
- 2004-12-16 KR KR1020067012042A patent/KR20060109944A/ko active IP Right Grant
- 2004-12-16 WO PCT/JP2004/018782 patent/WO2005059014A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001009949A (ja) * | 1999-07-02 | 2001-01-16 | Nippo Kk | 発泡体シートおよびこれを用いた保冷容器 |
JP2001299121A (ja) * | 2000-04-26 | 2001-10-30 | Shimadzu Corp | 生分解性を有する高分子材料からなる敷き藁代替品 |
JP2001302835A (ja) * | 2000-04-26 | 2001-10-31 | Shimadzu Corp | 生分解性発泡体及びその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
KR20060109944A (ko) | 2006-10-23 |
AU2004298570A1 (en) | 2005-06-30 |
JP2005179508A (ja) | 2005-07-07 |
CN101104707A (zh) | 2008-01-16 |
CA2549924A1 (en) | 2005-06-30 |
CN100445324C (zh) | 2008-12-24 |
EP1702946A1 (en) | 2006-09-20 |
JP3631743B1 (ja) | 2005-03-23 |
US20070254970A1 (en) | 2007-11-01 |
CN101104707B (zh) | 2011-01-05 |
CN1894316A (zh) | 2007-01-10 |
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