WO2001021696A1 - Composition for molding articles and method for preparing molded articles therefrom - Google Patents
Composition for molding articles and method for preparing molded articles therefrom Download PDFInfo
- Publication number
- WO2001021696A1 WO2001021696A1 PCT/KR2000/000979 KR0000979W WO0121696A1 WO 2001021696 A1 WO2001021696 A1 WO 2001021696A1 KR 0000979 W KR0000979 W KR 0000979W WO 0121696 A1 WO0121696 A1 WO 0121696A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- molding
- composition
- articles
- powder
- weight
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
Definitions
- the present invention relates, in general, to a composition for molding articles and, more particularly, to a composition based on an environmentally friendly material, which can be molded into articles which are harmless to the body and the environment and biodegradable or biodisintegrative . Also, the present invention is concerned with a method for preparing such an article from the composition.
- Environmental hormones scientifically called endocrine disrupters, are generic materials that interrupt or disrupt the action of hormones in human or animal bodies.
- the name "environmental hormones” was given to them because they act just like natural hormones in vivo, owing to their chemical structures which are similar to natural hormones' .
- environmental hormones may bring about serious health problems in humans, including reproductive function abnormalities, breakdown of sex ratio balance, unbalanced hormone secretion, immune function suppression, and increased rate of breast and prostatic cancers.
- policies has been directed to the regulation of the use of environmental hormone- causing materials or articles in many countries.
- recent legislation in response to environmental concerns stemming from environmental hormones and pollution, has been enacted to prohibit the use of environmental hormone-causing materials or articles in children's and dietary products.
- a composition for molding articles comprising: 90 parts by weight or less of grain powder as a base material and 20 parts by weight or less of compounds containing at least one component selected from the group consisting of hydroxyl (R-OH) , ester (R- C0 2 R' ) , carboxylic acid (R-C0 2 H) , amide (R-CONH-R' ) , imides (R-CONHCO-R' ) , amine (R-NH 2 ) , anhydride (R-C0 2 CO-R' ) , phosphonic acid (R-P0 3 H ) , sulfonic acid(R-S0 4 H) and melamine (wherein, R and R' are independently H, aliphatic or aromatic organic compounds, or organic compounds containing the above-mentioned components) as a molding assistant.
- R and R' are independently H, aliphatic or aromatic organic compounds, or organic compounds containing the above-mentioned components
- the composition may further comprise at least one additive selected from the group consisting of molding texture binders and functional improvers for molded articles.
- the additive is used at an amount of 90 parts by weight or less based on the weight of the composition, and the molding texture binder is a fibrous material.
- a method for preparing a molded article comprising the steps of: homogeneously mixing a composition comprising 90 parts by weight or less of grain powder as a base material and 20 parts by weight or less of a molding assistant; loading the composition on a molding machine; and molding the composition into an article for a predetermined period of time at a predetermined atmosphere.
- Fig. 1 is a partially broken perspective view showing a molded article in accordance with an embodiment of the present invention.
- Fig. 2 is a process flow chart illustrating a method for preparing molded articles from a composition in accordance with another embodiment of the present invention.
- Fig. 1 shows a molded article prepared from a composition of the present invention in a partially broken perspective view.
- the composition may be molded into various forms.
- FIG. 1 there is an article 10 which has an ordinary bowl form.
- a body 15 of the article 10 is prepared from a composition comprising wheat flour and a molding assistant powder, the article 10 has two coating layers 20 and 25 which are for its exterior and interior, respectively.
- the article 10 may alternatively be coated only on its one side or prepared with no coating. Since a powder phase of the composition can be pressurized without being modified additionally in a molding machine, the present invention is advantageous in that the molding process is simplified.
- wheat flour is the most preferable, but the present invention is not limited to this.
- an ordinary carbohydrate-based grain powder such as rice, starch, barley, or corn powder may be used as a base material for the molding composition.
- grain powders may be used as they are or in a viscous form, for example, dough mixed with a small quantity of water.
- the base material of the present invention may be in the form of powder, dough, and liquid.
- suitable for use as a base material for the composition of the present invention is a natural product or by-product such as chaff, sawdust, starch, glue, fish glue, or rice.
- the molded articles prepared from grain powders in accordance with the present invention are environmentally friendly because they release no toxic materials to the environment upon biodegradation.
- the molding assistant it is most preferably the said materials, but is not limited thereto.
- a pine resin is effectively used as a molding assistant by taking advantage of its molding-beneficial properties, such as foaming properties.
- the molding assistant materials must be selected discreetly in order to meet the environmentally friendly requirements of the final molding products.
- the contents of components contained in the molding assistant must be selected in consideration of their influence on the body and the environment.
- the molding assistant may be a variety of resins obtained from nature sources, for example, pine resin and natural rubbers. Usually, they are used as foaming or coating materials.
- the resins serve to maintain the final products in molded forms and to represent glosses on the surface of the final products.
- Representative of the said resins is a pine resin.
- the pine resin is deprived of oil and moisture and the residues are dried and powdered.
- suitable for use as molding assistants for the composition of the present invention are compounds containing at least one component selected from the group consisting of hydroxyl (R-OH) , ester (R-C0 2 R' ) , carboxylic acid (R-C0 2 H) , amide (R-CONH-R' ) , imides (R- CONHCO-R' ) , amine (R-NH 2 ) , anhydride (R-C0 2 CO-R' ) , phosphonic acid (R-P0 3 H 2 ) , sulfonic acid(R-S0 4 H) and melamine (wherein, R and R' are independently H, aliphatic or aromatic organic compounds, or organic compounds containing the above-mentioned components), but is not limited thereto. Any materials may be used if they can improve molding ability.
- the compounds may have various molecular weight and structure according to the components therein.
- Suitable for use as molding texture binders are powdered fibrous materials such as stems and leaves of various herbs and trees.
- the fibrous materials include wormwood, reed, wheat straw, barley straw, rice straw, cotton and their debris. Any materials may be used if they provide vegetable fibrous components.
- the molding texture binder serves to fortify the bonding strength between neighboring molding textures as well as contributing greatly to the physical properties of the final products, especially the strength of the molded products. Comparing molded products prepared from the base material and the molding assistant; and from the base material, the molding assistant and the molding texture binder clearly demonstrates the great contribution of the molding texture binder to the strength of the products.
- Preferred, non-limitative examples of functional improvers for molded articles include stone powder, soil powder, fine sand powder, and fine yellow earth powder.
- the functional improver allows the final product to have the appearance and functions of potteries.
- the molded articles are suitable for use in household wares and various construction materials such as pavement blocks.
- their functions cannot be sufficiently expressed without completely waterproofing the molded articles.
- application of an appropriate amount of at least one functional improver selected from soil powder, fine sand powder and fine yellow earth powder allows the final products to be freely expressed in strength, color, weight, and thickness.
- the final products can be prepared with suitable properties depending on their intended final uses.
- the grain powders and the above-mentioned resins contained in the molded articles according to the present invention are harmless to the body and friendly to the environment.
- the molding assistants play a role in determining the transparency of the molded articles. The more the molding assistant, the clearer the final product. Thus, the transparency of the final molded article can be controlled with the content of the molding assistant.
- the molded articles of the present invention cannot be made completely transparent like glass articles, but shows high transparency by controlling the content of the molding assistant.
- the composition for molding articles in accordance with the present invention may be in the form of a powder, dough, or a liquid.
- articles When articles are produced by molding, they are usually used in liquid forms.
- the present invention is advantageous in that the compositions can be employed irrespective of whether they are in a liquid phase or a powder phase.
- the powder phase in the case that a powder phase of the composition is used for the molding, the powder phase can be fed, as it is, into a molding machine and pressurized.
- the present invention enjoys the advantage of simplifying the molding process.
- a powder phase of the composition for molding articles in accordance with the present invention allows the molding process to be simply organized and thus, can reduce the production cost.
- Fig. 2 is a process flow of producing a molded article from the composition of the present invention.
- composition constituents are prepared and homogeneously mixed (SI) .
- SI homogeneously mixed
- a separate stirrer may be used.
- the composition When the composition is prepared in a powder phase, it may undergo a separate drying process to control its moisture content or it may be hydrated to retain an appropriate moisture content. On the whole, a powder is virtually impossible to store in a completely dried state if exposed to the air, and exhibits an unavoidable moisture content.
- the powder composition may be changed in its moisture content depending on ambient temperature and humidity. Since the moisture content of the composition may have a direct influence on the storage of the raw materials and/or the maintenance of molded shapes of final products, the moisture content needs to be controlled diversely and accurately in accordance with the intended uses of the final products.
- the composition When the composition is prepared in a liquid phase, a drying process is separately demanded for molded articles. Unless the moisture content of the final product is accurately controlled, it may slowly disintegrate because of the moisture content.
- the base material is used at an amount of 90 parts by weight, greater than 20 parts by weight of the molding assistant is not favorable in consideration of production costs.
- a greater amount of the molding assistant than the amount limit is not unable to achieve the object of the present invention, but is merely unfavorable in an economic aspects, and is within the scope of the invention.
- the prepared composition is colorized (S2) .
- an edible dye with a desired color is added in an appropriate amount to the homogeneously mixed composition.
- this colorizing step is, however, optional.
- Various colors can be expressed on the molded articles by applying various edible dyes.
- a powder phase or a liquid phase of the prepared composition is molded into a desired shape in a molding machine under appropriate conditions (S3).
- important parameters include temperature, pressure and time.
- the molding temperature is preferably controlled within the range of 100-200 °C, the molding pressure within the range of 200-400 kg/cm 2 , and the molding time within the range of several seconds to tens of seconds.
- control of the molding conditions is the most important factor in successfully conducting the molding process. Excessive temperature, pressure or time may cause the molded article to be burned or discolored.
- the composition is molded at 150 °C for about 20 sec under a pressure of 300 kg/cm 2 .
- a molded article is coated on one or both sides (S4).
- the molded articles prepared from the composition of the present invention are biodegradable or biodisintegrative and addition of a small amount of water suffices for the disposal of the articles.
- contact with water must be avoided.
- a waterproofing treatment may be conducted on the surfaces of the molded articles.
- functional surface layers may be provided to bring about an improvement in appearance, strength, flame resistance, wear resistance, and etc.
- the above- mentioned resin serving as a molding assistant, may be used. Formation of such a functional surface layer may be achieved by adding a surface-improving material during the molding or by coating the surfaces of molded articles after the molding. However, particular care must be taken of materials and their amounts used for the functional surface formation lest they run counter to the object of the present invention to produce biodegradable articles.
- the molded articles prepared according to the present invention can find numerous applications in many fields.
- the molded articles may be used as general household wares or daily necessities or applied to construction materials or packing materials.
- the molded products with fortified functions can be applied where conventional wood, plastics, iron or ceramic materials are used.
- the molded articles of the present invention can be used as feedstuff or fertilizers after their life spans.
- the composition for molding articles in accordance with the present invention is environmentally friendly because its materials are natural products .
- Another advantage of the present invention is that the composition of the present invention is economically favorable because its materials can be obtained with ease and are low-priced.
- the method for molding articles in accordance with the present invention is very advantageous in the following aspects: First, the composition useful in the method is easily prepared. Additionally, the method is so simple as to reduce the production cost of the final products. Thus, the final products are price-competent.
- the molded articles prepared according to the present invention if care is taken not to stain them, can be used repeatedly. Even when they are stained, the molded articles according to the present invention can be used many times if the stains are properly taken out.
- the present invention which is directed to a composition and a molding method using the same, produces environmentally friendly articles which can at least partially solve the problems of environmental hormones and pollutants.
- low-priced materials for the compositions of the present invention such as wheat flour, make the final products price- competent.
- the molded articles of the present invention can be utilized as materials for other articles.
- the molded articles of the present invention are easily degraded by microorganisms without producing any harmful materials to the body and the environment.
- the molded articles prepared from the molding composition by the method according to the present invention can be applied to disposable supplies such as ramen containers, trays, dishes, chopsticks, toothbrushes, razor handles, knives, spoons, hamburger containers, ice cream containers, ice cream sticks, ice cream spoons, stirring sticks for coffee, toothpicks, forks, straws, golf tees, and food vessels; reusable supplies such as meal trays, salvers, vessels, cups, gourds, restaurant vessels, dishes, and packing materials; daily necessities such as coat hangers, dustbins, picture frames, toys, vases, pencil cases, cases for spoons and chopsticks, ash trays, wall/table clock cases, disc boxes, knitting needles, and spectacles frames; office supplies such as ball pen cases, pencil cases, scotch tape frames, furniture subsidiaries, office desks, clothes chests, and bookshelves; materials for interior and
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR0014620-0A BR0014620A (en) | 1999-09-22 | 2000-08-30 | Composition for molding articles and method for preparing molded articles |
MXPA02002706A MXPA02002706A (en) | 1999-09-22 | 2000-08-30 | Composition for molding articles and method for preparing molded articles therefrom. |
JP2001525264A JP2003510391A (en) | 1999-09-22 | 2000-08-30 | Composition for producing molded article and method for producing molded article using the same |
EP00955156A EP1232207A4 (en) | 1999-09-22 | 2000-08-30 | Composition for molding articles and method for preparing molded articles therefrom |
AU67391/00A AU6739100A (en) | 1999-09-22 | 2000-08-30 | Composition for molding articles and method for preparing molded articles therefrom |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1999/41069 | 1999-09-22 | ||
KR1019990041069A KR100338260B1 (en) | 1999-09-22 | 1999-09-22 | Composition for producing a vessel and method for producing a vessel using the same |
KR10-1999-0056132A KR100368048B1 (en) | 1999-12-09 | 1999-12-09 | Composition for producing a plastic goods and method for producing a plastic goods using the same |
KR1999/56132 | 1999-12-09 | ||
KR10-1999-0056131A KR100368047B1 (en) | 1999-12-09 | 1999-12-09 | Composition for producing a plastic goods and method for producing a plastic goods using the same |
KR1999/56131 | 1999-12-09 | ||
KR2000/49850 | 2000-08-26 | ||
KR1020000049850A KR20020016679A (en) | 2000-08-26 | 2000-08-26 | Composition for producing a plastic goods and method for producing a plastic goods using the same |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001021696A1 true WO2001021696A1 (en) | 2001-03-29 |
Family
ID=27483392
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2000/000979 WO2001021696A1 (en) | 1999-09-22 | 2000-08-30 | Composition for molding articles and method for preparing molded articles therefrom |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1232207A4 (en) |
JP (1) | JP2003510391A (en) |
CN (1) | CN1384853A (en) |
AU (1) | AU6739100A (en) |
BR (1) | BR0014620A (en) |
MX (1) | MXPA02002706A (en) |
WO (1) | WO2001021696A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003055562A2 (en) * | 2001-12-28 | 2003-07-10 | Peter Webber | Golf accessories |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102285461B1 (en) * | 2020-02-28 | 2021-09-03 | 이정훈 | Stick candy |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5288318A (en) * | 1993-07-01 | 1994-02-22 | The United States Of America As Represented By The Secretary Of The Army | Cellulose acetate and starch based biodegradable injection molded plastics compositions and methods of manufacture |
US5320669A (en) * | 1992-12-14 | 1994-06-14 | Iowa State University Research Foundation, Inc. | Cereal grain-based biodegradable thermoplastic compositions |
JPH08239402A (en) * | 1995-03-03 | 1996-09-17 | Nippon Koonsutaac Kk | Esterified, vinyl-ester-grafted starch |
JPH09294482A (en) * | 1996-05-07 | 1997-11-18 | Nippon Shokuhin Kako Co Ltd | Biodegradable pot for raising seedling |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3263435B2 (en) * | 1992-07-13 | 2002-03-04 | 日世株式会社 | Biodegradable foam molded container and method for producing the same |
US5736209A (en) * | 1993-11-19 | 1998-04-07 | E. Kashoggi, Industries, Llc | Compositions having a high ungelatinized starch content and sheets molded therefrom |
BR9508812A (en) * | 1994-08-27 | 1997-12-23 | Jung H Metraplast Gmbh | Biologically degradable material from new generation raw materials and process for its preparation |
-
2000
- 2000-08-30 CN CN 00813254 patent/CN1384853A/en active Pending
- 2000-08-30 WO PCT/KR2000/000979 patent/WO2001021696A1/en not_active Application Discontinuation
- 2000-08-30 BR BR0014620-0A patent/BR0014620A/en not_active IP Right Cessation
- 2000-08-30 MX MXPA02002706A patent/MXPA02002706A/en not_active Application Discontinuation
- 2000-08-30 AU AU67391/00A patent/AU6739100A/en not_active Abandoned
- 2000-08-30 EP EP00955156A patent/EP1232207A4/en not_active Withdrawn
- 2000-08-30 JP JP2001525264A patent/JP2003510391A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5320669A (en) * | 1992-12-14 | 1994-06-14 | Iowa State University Research Foundation, Inc. | Cereal grain-based biodegradable thermoplastic compositions |
US5288318A (en) * | 1993-07-01 | 1994-02-22 | The United States Of America As Represented By The Secretary Of The Army | Cellulose acetate and starch based biodegradable injection molded plastics compositions and methods of manufacture |
JPH08239402A (en) * | 1995-03-03 | 1996-09-17 | Nippon Koonsutaac Kk | Esterified, vinyl-ester-grafted starch |
JPH09294482A (en) * | 1996-05-07 | 1997-11-18 | Nippon Shokuhin Kako Co Ltd | Biodegradable pot for raising seedling |
Non-Patent Citations (1)
Title |
---|
See also references of EP1232207A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003055562A2 (en) * | 2001-12-28 | 2003-07-10 | Peter Webber | Golf accessories |
WO2003055562A3 (en) * | 2001-12-28 | 2003-12-31 | Peter Webber | Golf accessories |
Also Published As
Publication number | Publication date |
---|---|
MXPA02002706A (en) | 2002-07-30 |
BR0014620A (en) | 2002-06-18 |
JP2003510391A (en) | 2003-03-18 |
AU6739100A (en) | 2001-04-24 |
EP1232207A4 (en) | 2005-01-19 |
EP1232207A1 (en) | 2002-08-21 |
CN1384853A (en) | 2002-12-11 |
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